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Cowdrey, H. E. J. "La caroixa d'Ara Christi 1585–1660. 2 volumes. By Albert Ferrer Orts. Pp. 247, 284. (Analecta Cartusiana, 197.) Salzburg: Institut für Anglistik und Americanistik, 2004. isbn 3 900033 11 0. Paper n.p". Journal of Theological Studies 56, n. 2 (1 ottobre 2005): 835. http://dx.doi.org/10.1093/jts/fli260.
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Wittenhagen, Julia. "Hybrid für immer". Lebensmittel Zeitung 74, n. 36 (2022): 47. http://dx.doi.org/10.51202/0947-7527-2022-36-047.
Testo completoAbstract (sommario):
Die Pandemie hat das Arbeitsleben in eine neue Ära geführt: Die Option Homeoffice befreit vom Joch der starren Zeiten und Orte. Komplett zurückdrehen lässt sich das Rad nicht mehr, glaubt das Rheingold Institut, und richtet den Blick auf den Mensch im „New Normal“.
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Tran, Hien Thi, e Phong Duc Pham. "Research and complete the processing technology of Son La oxide copper ores for the Tay Bac Minerals Joint Stock Company". Journal of Mining and Earth Sciences 62, n. 3b (20 luglio 2021): 22–29. http://dx.doi.org/10.46326/jmes.2021.62(3b).03.
Testo completoAbstract (sommario):
The copper ore processing plant of the Tay Bac Minerals Joint Stock Company has been designed and operated to produce metallic copper from copper sulphide ores and copper oxide ores in Son La province. Copper sulphide ores are processed to produce copper concentrates with content of more than 20% Cu for the next processing stage, while copper oxide ores, with average content of 1÷3% Cu and after grinding, are fed directly into hydrometallurgical processes to extract copper. However, this process requires large amount of chemicals. Therefore, the economic efficiency is not high. The National Institute of Mining - Metallurgy Science and Technology has researched and proposed a reasonable technology process for Son La copper oxide ores for solving difficulties and perfecting the processing technology at the plant that improves economic efficiency and minimizes environmental pollutions. This report presents results of the experimental production research project with the code CNKK.013.19, implemented by the Institute of Materials Science and sponsored by the Ministry of Industry and Trade.
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Back, Nikolaus, e Reinhild Kreis. "Rezension von: Kreis, Reinhild, Orte für Amerika". Zeitschrift für Württembergische Landesgeschichte 73 (30 marzo 2022): 440–42. http://dx.doi.org/10.53458/zwlg.v73i.2334.
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Reinhild Kreis, Orte für Amerika, Deutsch-Amerikanische Institute und Amerikahäuser in der Bundesrepublik seit den 1960er Jahren (Transatlantische historische Studien Bd. 44), Stuttgart: Franz Steiner Verlag 2012. 425 S., 19 s/w Abb. ISBN 978-3-515-10048-9. € 56,–
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Vogel, Bernd. "Orte des Selbststudiums 2018". ABI Technik 39, n. 2 (1 luglio 2019): 92–103. http://dx.doi.org/10.1515/abitech-2019-2002.
Testo completoAbstract (sommario):
Zusammenfassung Das HIS-Institut für Hochschulentwicklung hat im Frühjahr 2018 eine Befragung unter Studierenden zum Selbststudium durchgeführt. Unter Selbststudium wird das studienbezogene Lernen außerhalb von Lehrveranstaltungen verstanden. Ziel war es, empirische Daten darüber zu erheben, an welchen Orten und mit welchem Zeitaufwand Studierende außerhalb von Lehrveranstaltungen lernen. Im Ergebnis zeigt sich, dass aktuell die beliebteste Lernwelt der Studierenden das Homeoffice ist: zwei Drittel der Studierenden lernen vor allem zu Hause, ein Drittel in der Hochschule. Innerhalb der Hochschulen ist die Bibliothek der beliebteste Lernort. Allerdings lernt eine große Gruppe von Studierenden kaum oder gar nicht in der Bibliothek, ein kleinerer Anteil dagegen sehr intensiv (mehr als 8 Stunden/Woche). Die digitalen Angebote der Hochschulbibliotheken werden von rund 80 % der Studierenden genutzt, überwiegend zu Hause. Das Lernverhalten der Studierenden ist je nach Fächergruppe sehr heterogen.
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Berbey Álvarez, Aránzazu. "Dr Oris Sanjur". Prisma Tecnológico 12, n. 1 (1 marzo 2021): 8–10. http://dx.doi.org/10.33412/pri.v12.1.2968.
Testo completoAbstract (sommario):
Dr. Sanjur’s relationship with the Smithsonian Tropical Research Institute spans three decades.
In 1989, she was a research assistant for two years working on her undergraduate thesis project. After earning a B.S. in Biology from the University of Panama, she completed a PhD in Cell and Developmental Biology at Rutgers, the State University of New Jersey. She returned to STRI as a postdoctoral fellow in 1998, studying the relationships between wild and domesticated crops such as squash and pumpkin.
She then spent ten years as manager and researcher of the Molecular Evolution laboratory, after which she took on her most recent role as Associate Director for Science Administration at STRI. In this position, she became responsible for maintaining high standards of scientific operational support for the Institute’s research programs throughout a decade.
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Poole, Farris L., Brian A. Gerwe, Robert C. Hopkins, Gerrit J. Schut, Michael V. Weinberg, Francis E. Jenney e Michael W. W. Adams. "Defining Genes in the Genome of the Hyperthermophilic Archaeon Pyrococcus furiosus: Implications for All Microbial Genomes". Journal of Bacteriology 187, n. 21 (1 novembre 2005): 7325–32. http://dx.doi.org/10.1128/jb.187.21.7325-7332.2005.
Testo completoAbstract (sommario):
ABSTRACT The original genome annotation of the hyperthermophilic archaeon Pyrococcus furiosus contained 2,065 open reading frames (ORFs). The genome was subsequently automatically annotated in two public databases by the Institute for Genomic Research (TIGR) and the National Center for Biotechnology Information (NCBI). Remarkably, more than 500 of the originally annotated ORFs differ in size in the two databases, many very significantly. For example, more than 170 of the predicted proteins differ at their N termini by more than 25 amino acids. Similar discrepancies were observed in the TIGR and NCBI databases with the other archaeal and bacterial genomes examined. In addition, the two databases contain 60 (NCBI) and 221 (TIGR) ORFs not present in the original annotation of P. furiosus. In the present study we have experimentally assessed the validity of 88 previously unannotated ORFs. Transcriptional analyses showed that 11 of 61 ORFs examined were expressed in P. furiosus when grown at either 95 or 72°C. In addition, 7 of 54 ORFs examined yielded heat-stable recombinant proteins when they were expressed in Escherichia coli, although only one of the seven ORFs was expressed in P. furiosus under the growth conditions tested. It is concluded that the P. furiosus genome contains at least 17 ORFs not previously recognized in the original annotation. This study serves to highlight the discrepancies in the public databases and the problems of accurately defining the number and sizes of ORFs within any microbial genome.
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Parzinger, Hermann. "Klima für die Katz. Kleine Expedition in die Kleine Eiszeit". Zeitschrift für Ideengeschichte 18, n. 1 (2024): 80–88. http://dx.doi.org/10.17104/1863-8937-2024-1-80.
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Im Sommer 2021 fanden wir bei der Erneuerung des Daches in unserem «Stammsitz» im Bayerischen Wald Teile einer mumifizierten Katze (Abb. 1). Die Katze unter dem Dach weckte meine Neugier, und ich begab mich auf Spurensuche. Wie lange hatte sie dort schon gelegen? Das aus Fichtenbalken traditionell errichtete Waldlerhaus befindet sich im ältesten Dorfkern des Ortes Hohenwarth (Landkreis Cham). Urkundlich erwähnt wird das Dorf erstmals 1180. Ein Kollege des Deutschen Archäologischen Instituts half, die Zeit des Fundstücks weiter einzukreisen. Die dendrochronologische Analyse eines Balkens ergab eine Datierung der Baumringfolge von 1459 bis 1521, und aufgrund der erhaltenen Waldkante muss danach der zugehörige Baum im Winter 1521/22 gefällt worden sein.
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Li, Ya, L. Zhuo, I. V. Shadrunova, A. K. Ermamatov e T. V. Chekushina. "Development of Technologies to Reduce Environmental Risk in Extracting Gold from Refractory Ores". Mining Industry (Gornay Promishlennost), n. 6/2020 (29 dicembre 2020): 143–47. http://dx.doi.org/10.30686/1609-9192-2020-6-143-147.
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The task of the countries of the Eurasian Economic Union is to look for effective technologies to recover gold from refractory ores while reducing the environmental hazard of the operations. In order to solve this problem, the Jin Xing reactant (a salt complex) was developed in the Kyrgyz Republic in the course of studying alternative highly effective agents for gold recovery from gold-bearing ores of different genesis. Joint studies of the Full Gold Mining Company, the Institute of Comprehensive Exploitation of Mineral Resources of the Russian Academy of Sciences and the Tae Jin Xing Science and Environmental Technology Company justified the application efficiency of the developed Jin Xing reactant. The paper presents the results of testing the new agent at a real mining operation.
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Alquier, Eleonore. "Data Management at the French National Audiovisual Institute (Ina)". Atlanti 26, n. 1 (24 ottobre 2016): 101–8. http://dx.doi.org/10.33700/2670-451x.26.1.101-108(2016).
Testo completoAbstract (sommario):
The French National Audiovisual Institute has been responsible since 1974 for the preservation of the audiovisual heritage produced by national broadcasting corporation (or “Office de radio et television française”: ORTF, for French radio and television corporation). The massive digitalization of these collections in the 1990s, the native digital capture of 120 channels since 2001, the opening of a “general public” website in 2006, are some of the steps taken by the Institute to progressively take into account the digital technologies to benefit the audiovisual preservation. This proposal of presentation would provide an update on the evolution of our processing, concerning most specifically a multi-year project which aims, linked to a new big data policy, to harmonize descriptive metadata according to common thesaurus and to streamline production processes as well as to promote new uses of these contents within the Institute (partial automation of documentary processing by automatic detecting of quoted or represented entities (faces, names, …), automatic articulation of documentary and legal metadata, …), but also outside of the Institute (online access to open data, access to media by technical data mining, …).
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Oahimire, Debrah Memshima, Victor Uchechi Ukaegbu e Joel Friday Ogbonna. "Quality assessment of some baryte ores in Benue state area, Nigeria for oilfield drilling". Journal of Degraded and Mining Lands Management 8, n. 4 (1 giugno 2021): 2861–72. http://dx.doi.org/10.15243/jdmlm.2021.084.2861.
Testo completoAbstract (sommario):
The massive exploration and production well drillings in Nigerian oilfield indicate the demand for drilling fluid supplements such as baryte, in managing over-pressured formations and preventing hazardous blowouts. The underdevelopment of Nigerian solid minerals has created a wide gap between the demand and supply of the local resource, whereas there exist some assertions that the Nigerian baryte quality is below the American Petroleum Institute, API, standard. This study aimed at testing and evaluating qualitatively, based on API standards, some baryte ores from the Benue area, Nigeria, to establish their usefulness or otherwise in oilfield drilling operations. General field studies and sampling with laboratory studies were done including flame tests, X-ray Diffraction and X-ray fluorescence, to confirm mineralogy and chemical compositions of the barytes respectively and very importantly, the API tests prescribed for drilling grade barytes were carried out. The results showed impressive quality barytes with a specific gravity range from 4.10 to 4.49 and concentration of alkaline earth metals as calcium, Ca, 20mg/kg to 48mg/kg, particle sizes processed within API standard requirement, and the weight percentage of BaSO4 composition of the ores ranged from 93.55% to 99.61%. There were no significant impurities of threat such as carbonates, iron ores, silicates and sulphides. The estimation of reserves and proper development of the resource is highly recommended as the quantity and quality might enhance the sustainability of local drilling grade baryte supply and save Nigeria the current huge capital flight and other plights
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Tsyrenov, Т. "Rare-earth element distribution features in natural-technogenic complexes of some polymetallic deposits of Eastern Transbaikalia". Transbaikal State University Journal 27, n. 1 (2021): 15–23. http://dx.doi.org/10.21209/2227-9245-2021-27-1-15-23.
Testo completoAbstract (sommario):
The purpose of the study is to investigate rare-earth elements distribution features in all components of the natural-technogenic complexes of Akatuevsky, Blagodatsky and Novo-Shirokinsky polymetallic deposits of Eastern Transbaikalia. Due to increasing demand for rare-earth elements (REE) in various fields of industry, identification of features of REE distribution in natural-technogenic complexes of polymetallic deposits of Eastern Transbaikalia is relevant. The chemical elements of the REE group include 15 elements, yttrium (Y) and the lanthanoid group consisting of 14 elements (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu). Determination of the elemental composition of samples was carried out by X-ray fluorescence method in the Geological Institute of the Geological Institute of the Siberian Branch of the Russian Academy of Sciences (Ulan-Ude) and by ICP- MS method in the laboratory of SGS Vostok Limited (Chita). In the process of investigations REE concentrations in all components of natural-technogenic complexes of Akatuevsky, Blagodatsky and Novo-Shirokinsky polymetallic deposits (lead-zinc ores, technozems, soils) were determined. Their regular decrease of REE concentrations in the order: soils→technozems→lead-zinc ores was established. In the most of studied samples there is a decrease of heavy lanthanides content relative to light ones, as well as negative europium anomaly, in some samples of lead-zinc ores positive europium anomaly is observed. Europium anomaly magnitude (Eu/Eu*) is an indicator of the degree of differentiation of magmatic melts, determined by plagioclase fractionation processes. It is known that feldspars serve as the main controller of the Europium anomaly. The phenomenon of a negative europium anomaly is observed if plagioclase remains in the source after fractional crystallization or partial melting. Positive europium anomaly in sulphide ores is caused by the presence of barite, as well as by the accumulation of plagioclase in the liquid phase due to the fractionation process. REE is known to have adverse effects on the environment due to its high biological and biochemical activity. Modern methods of remediation of the potential damage to the environment have been proposed
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Krivolutskaya, Nadezhda A. "Foundations of the theory of magmatic ore formation in works by M. N. Godlevsky and their modern development". Ores and metals, n. 4 (11 gennaio 2023): 119–35. http://dx.doi.org/10.47765/0869-5997-2022-10025.
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On the occasion of the 120th anniversary of the birth of Mikhail Nikolayevich Godlevsky, an outstanding geologist and researcher of magmatic sulfide deposits, a book about the life of this remarkable man “From the depths of the Norilsk ores. Mikhail Godlevsky” is being prepared at the Central Research Geological Prospecting Institute for Base and Precious Metals, where he worked in 1961-1984. The material published below is based on the article “The theory of magmatic ore formation in works by M. N. Godlevsky and its modern aspects” from the anniversary edition and contains minor editorial changes. The article considers the principal theoretical provisions of the magmatic genesis of the Norilsk platinum-copper-nickel deposits, that were developed by M. N. Godlevsky in his works. Particular attention is paid to his still unpublished doctoral dissertation that covers all aspects of the genesis of the unique Norilsk ores: from the formation conditions of the ore-bearing magmas in the northwest Siberian Platform and their crystallization in the upper zones of the earth's crust, to the formation of disseminated and veined ores of the Norilsk 1 and Zub-Marksheiderskoe deposits. Modern views are presented on the origin of ore deposits of the Norilsk region, which were characterized in the works by M. N. Godlevsky.
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Trommler, Frank. "Orte für Amerika. Deutsch-Amerikanische Institute und Amerikahäuser in der Bundesrepublik seit den 1960er Jahren by Reinhild Kreis". German Studies Review 38, n. 2 (2015): 459–61. http://dx.doi.org/10.1353/gsr.2015.0059.
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ONOPRIENKO, VALENTIN. "PROFESSOR YA. V. SAMOILOV: CONTRIBUTION TO THE DEVELOPMENT OF PALEOBIOCHEMISTRY, THE DOCTRINE OF BIOLITHS AND AGRONOMIC ORES. TO THE 150TH ANNIVERSARY OF THE BIRTH". History and modern perspectives 2, n. 3 (30 settembre 2020): 86–102. http://dx.doi.org/10.33693/2658-4654/-2020-2-3-86-102.
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Yakov Vladimirovich Samoilov (1870-1925) - a large and original mineralogist, geologist, paleobiogeochemist of the early 20th century, one of the first students of V.I. Vernadsky at Moscow University, a talented teacher, professor at Moscow University, Moscow Agricultural Institute, Novoaleksandriysky Institute of Agriculture and Forestry. As a mineralogist he worked in the Urals, in Central Russia, in the Donetsk basin. Head of a large-scale program for the study of phosphorites in European Russia, founder and first director of the Scientific Institute for Fertilizers, an active participant in several international geological congresses. Developed the doctrine of biolites and agronomic ores. He made an original contribution to the substantiation of paleobiochemistry, sedimentology and lithology. I'M IN. Samoilov was one of the first scientists to pay attention to the study of the mineralogy of sedimentary deposits. Organizer and head of a large-scale program for studying phosphorite deposits in European Russia with the aim of using phosphorus fertilizers in agriculture. Organizer of the Public Committee and the Scientific Institute for Fertilizers (now the Ya.V. Samoilov Scientific Institute for Fertilizers and Insectofungisides), an active participant in the organization of research in mineralogy and geochemistry at the Institute of Applied Mineralogy and the Floating Marine Scientific Institute, chairman of a number of commissions at the Supreme Council of the National Economy of the USSR, a consultant State Planning Committee of the USSR. All his life he was in close communication with V.I. Vernadsky.
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Nishonov, V., A. Badnjevich e N. Muminov. "EFFECTIVENESS OF LEGAL MEDICAL METROLOGY IN THE REPUBLIC OF UZBEKISTAN". Journal of Science and Innovative Development 6, n. 1 (27 aprile 2023): 42–53. http://dx.doi.org/10.36522/2181-9637-2023-1-6.
Testo completoAbstract (sommario):
Safety and reliability of medical devices are becoming more emphasized as the time passess. Crisis situations such as COVID-19 have shown the negative eff ects that can be brought upon by lack of medical device surveillance mechanisms. This aim of this study is to present the results of implementation of legal metrology framework conducted by joint eff orts of the State Center of Expertise and Standardization of Medicines, Medical Devices, and Medical Equipment and Uzbek National Institute of Metrology. The study was based upon the data collected from annual performance inspectionsin all healthcare institutions in the period from 2016 to 2021 for 11 types of medical devices. Data envelopment analysis was used to derive conclusions and the results were compared with results from Bosnia and Herzegovina. Results indicate that the implementation of legal metrology framework leads to a signifi cant increase in the accuracy of medical devices hence leading to increased reliability and patient safety in diagnostic and therapeutic processes.
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Voyeikov, E. V. "«CADRES DETERMINE EVERYTHING». TO THE QUESTION OF THE REASONS FOR THE FAILURE OF THE VOLGA SHALE PROJECT DURING THE PRE-WAR FIVE-YEAR PLANS". Izvestiya of Samara Scientific Center of the Russian Academy of Sciences. History Sciences 3, n. 1 (2021): 19–34. http://dx.doi.org/10.37313/2658-4816-2021-3-1-19-34.
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The author examines the activities of managers of shale ores and heads of party bodies of the Kuibyshev and Saratov regions who implemented the Volga shale project in the 1930s. The managers from mining departments committed a number of unprofessional actions in the organization of the production process of shale mining, which contributed to the departure of workers from the mines, mass absenteeism, downtime of teams of miners during work shifts. The party leaders of the Kuibyshev and Saratov regions did not provide the necessary assistance to engineers from the Volga Heat Engineering Institute in organizing tests of shale furnaces and paid little attention to the problems of shale mines.
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Abramov, B. N., e V. F. Posokhov. "Petrogeochemical and isotopic characteristics, connection with magmatism of tungsten deposits of Aginskaya and Argunskaya structural-formation zones of the Eastern Transbaikalia". LITHOSPHERE (Russia) 21, n. 2 (26 aprile 2021): 262–72. http://dx.doi.org/10.24930/1681-9004-2021-21-2-262-272.
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Research subject. Tungsten deposits of the Aginsky and Argunsky structural-formation zones in the Eastern Transbaikalia. The aim was to clarify the sources and conditions for the formation of tungsten mineralisation, as well as to clarify a relationship between magmatism and tungsten mineralisation. The conditions of deposit formation were studied using data on the chemical composition of rocks and ores and the oxygen isotopic composition of the ore veins of tungsten deposits.Methods. The elemental composition of rocks was determined by the methods of X-ray fluorescence and standard chemical analysis; the concentration of rare-earth elements was determined by sorption-atomic emission analysis with inductively coupled plasma (Geological Institute SB RAS, Ulan-Ude). The examination of oxygen isotope composition was carried out at the Geological Institute of SB RAS (Ulan-Ude) using a MIR 10-30 system of laser heating with a 100W CO2 laser and 10.6 microns wavelength in the infrared region in the presence of a BrF5 reagent (analyst V.F. Posokhov).Results and conclusions. It was established that granites in the Kukulbey complex of the Antonovogorsky and Bukukinsky tungsten deposits correspond to granites of an ilmenite series, while the ores in the Spokoininsky deposit are associated with the granites of a magnetite series. A close correlation was established between W with Ta, Nb, Hf and As, indicating similar compositions of ore-bearing sources of the tungsten deposits. For Barun-Shiveinsky, Antonovogorsky and Bukukinsky deposits, the oxygen isotope compositions in the fluid in equilibrium with quartz of the productive stage was calculated, indicating the magmatic sources of mineralisation.
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Ismayilov, Rasim T., Vagif M. Kаrimov e Sevil A. Zeynalova. "Study of spontaneous combustion of the main industrial types of sulphide ores of sulphide- polymetallic deposits of Azerbaijan". Journal of Geology, Geography and Geoecology 32, n. 1 (9 aprile 2023): 59–66. http://dx.doi.org/10.15421/112307.
Testo completoAbstract (sommario):
The article is devoted to the study of the causes and conditions of spontaneous com- bustion of sulphide ores, which may result in endogenous fires that complicate mining operations in mines, causing enormous material damage to the national economy, and often also leading to human casualties. There are several sulphide-polymetallic deposits in Azerbaijan, the reserves of which were approved back in the days of the USSR. Of these, the Filizchay deposit is the most unique in terms of its reserves and ore composition. The development of other deposits adjacent to the Filizchay deposit, separately, is inexpedient because of their small reserves. However, the development of sulphide-polymetallic deposits in Azerbaijan is complicated by the revealed tendency of industrial types of ores to oxidation and spontaneous combustion. In this regard, there was a need for a special study of the chemical activity of sulphide ores and the phenomena accompanying oxidative processes, taking into account the natural features of the deposits in order to obtain the initial parameters necessary for scientifically based technological solutions for their development. Sulphide ores of sulphide -polymetallic deposits of Azerbaijan significantly differ in material composition, conditions of occurrence and mining technical features of their development from the listed deposits, the issues of spontaneous combustion of which have been studied for a long time. Until now, there are no general criteria for assessing the fire hazard of sulphide ores, suitable for any deposit, since the conditions for the occurrence of underground fires at different deposits are different. It is this circumstance that makes it necessary to conduct special studies for each deposit separately. Therefore, the need for a special study of this problem on the example of the conditions of sulphide-polymetallic deposits in Azerbaijan, which are prone to oxidation and spontaneous combustion, is of great importance. Identification of causes and factors affecting spontaneous combustion of sulphide ores, classification of sulphide-polymetallic deposits of Azerbaijan according to the degree of their tendency to spontaneous combustion by analyzing the collected materials, as well as by the results of studies to determine the oxidative activity of sulphide ores. The article presents the results of experimental studies to determine the oxidative activity and spontaneous combustion of sulphide ores of the Katsdag, Filizchay and Katekh deposits, carried out in laboratory conditions by the method of Institute of Mining named after. A.A. Skochinsky, the basis of which is the determination of the oxygen absorption rate constant. It is known that the susceptibility of ore to spontaneous combustion is determined by its oxidizability at low temperatures and depends on a large number of factors. In this regard, the dependence of the total amount of oxygen absorbed by sulphide ores on time has been studied, it has been established that the rate of oxygen absorption by sulphide ores is long-live and slowly fading, but incessant. On the basis of extensive experimental material, a classification of sulphide ores of Azerbaijan according to the degree of tendency to spontaneous combustion according to low-tempera-ture oxidation is proposed, since it is this that forms the basis of the spontaneous combustion process. The classification is also based on differences in textural and structural features and mineralogical composition of ores. Of great interest is also the influence of the size of the free reacting surface of the ore on the oxidation process. Analysis of ore samples shows that for their spontaneous combustion, the most dangerous are its coarse fractions than the dust. The results of the conducted studies allow a scientifically sound approach to planning the sequence of development and designing mines.
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Sahin, Ibrahim Halil, Wanqi Chen, Mohamad Bassam Sonbol, Satya Das, Zhengjia Chen, Mehmet Akce, Olatunji B. Alese et al. "Analysis of age, tumor-sidedness, and mismatch repair (MMR) genes with response to immune checkpoint inhibitors (ICIs) in MMR-deficient (dMMR) colorectal cancer (CRC) patients (pts): A multi-institutional study." Journal of Clinical Oncology 37, n. 15_suppl (20 maggio 2019): e15029-e15029. http://dx.doi.org/10.1200/jco.2019.37.15_suppl.e15029.
Testo completoAbstract (sommario):
e15029 Background: ICIs induce durable responses in dMMR CRC pts with overall response rates (ORR) of 30-50%. Even though the loss of expression of any MMR gene predicts ICIs response, it is unknown if ORRs are similar across all MMR genes (MLH1, PMS2, MSH2, and MSH6). In this study, we analyzed the impact of each specific MMR gene loss and clinical characteristics of pts with best response to ICIs. Methods: Pts were eligible if they had confirmed dMMR CRC by IHC or microsatellite instability-high (MSI-H) by PCR, and received ICIs between 01/01/2012 and 10/01/2018 at Winship Cancer Institute of Emory University, Mayo Clinic or Vanderbilt University Medical Center. Due to the pattern of frequent concurrent loss and functional dependency, the groups were categorized as MLH1 ±PMS2 vs. MSH2 ±MSH6. Cox proportional hazard model and Fisher’s exact test were used for the best response and the distribution of variable among the subgroups. Results: A total of 45 pts with dMMR CRC were identified. ORRs in MLH1 ±PMS2 and MSH2 ±MSH6 groups were 68% and 57.1% respectively without statistical difference (Table). Pts with age < 50 and 50-65 years old had better ORRs compared to pts with age >65 (58.3%, 85.7% and 42.1% respectively, P=0.036). Left-sided tumors had a trend toward higher ORRs compared to right-sided tumors (83.3% vs 51.5% P=0.086). Gender and BRAF status were not predictors of response. BRAF mutations were more common in right-sided tumors (29.6% vs 11.1% respectively) and in older patients. Conclusions: Our data suggest that MSI-H CRC pts aged 50-65 treated with ICIs, have improved ORR compared to pts > 65; pts with left-sided tumors have a trend toward improved ORR compared to those with right sided tumors. [Table: see text]
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Kulikov, Vadim I. "Improving the technology of gold ore X-ray radiometric separation". Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal 1, n. 3 (14 maggio 2021): 88–96. http://dx.doi.org/10.21440/0536-1028-2021-3-88-96.
Testo completoAbstract (sommario):
Introduction. Gold ore pre-concentration is an urgent issue that can efficiently be solved by the technology of X-ray radiometric separation (XRS). Quarts and quarts-sulfide gold ore XRS is based on the methods of indirect sorting by gold accompanying chemical elements or genetic associate minerals laying the foundation for the creation of separation characteristics for these ores. Additional separation characteristics are required for efficient gold-quartz and gold-quartz-sulfide ore sorting; Irgiredmet Research Institute works on these characteristics search and development. Research methodology. Optimal ore separation characteristics for each specific deposit are chosen after studying and analyzing the spectral information acquired at XRF separators when detecting secondary characteristic radiation from each specific deposit ore samples. The recent modernization of XRF separators significantly enhanced the technological capabilities of XRS concerning intensive search and study of new separation characteristics for gold ore. It has been established that most ores can be efficiently sorted by three characteristics. Research results. A new method of gold ore XRS has been developed which consists of simultaneously applying three, two, or one decision criterion of a lump separation depending on the type, geologicalmineralogical properties, and material composition of the processed ore
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Asherson, Philip, Lena Johansson, Rachel Holland, Megan Bedding, Andrew Forrester, Laura Giannulli, Ylva Ginsberg et al. "OROS-methylphenidate to reduce ADHD symptoms in male prisoners aged 16–25 years: a RCT". Efficacy and Mechanism Evaluation 9, n. 6 (giugno 2022): 1–114. http://dx.doi.org/10.3310/thei8200.
Testo completoAbstract (sommario):
Background It is estimated that 20–30% of prisoners meet diagnostic criteria for attention deficit hyperactivity disorder (ADHD). Methylphenidate reduces ADHD symptoms, but its effect among prisoners remains uncertain. Objectives The primary objective was to estimate the efficacy of osmotic release oral system (OROS) methylphenidate in reducing ADHD symptoms in male prisoners aged 16–25 years who met diagnostic criteria for ADHD. Secondary objectives investigated change for associated clinical and behavioural problems and the role of ADHD symptoms in mediating change in behaviour. Design A Phase IV, 8-week, parallel-arm, double-blind, randomised, placebo-controlled trial of OROS-methylphenidate, compared with placebo, in young male adult prisoners with ADHD. Participants were randomised in a 1 : 1 ratio of OROS-methylphenidate to placebo, stratified by prison. Setting Participants were recruited from Her Majesty’s Prison and Young Offender Institution Isis (London, England) and Her Majesty’s Young Offender Institution Polmont (Falkirk, Scotland). Participants The participants were 200 male prisoners with ADHD aged 16–25 years who met the diagnostic criteria for ADHD. Exclusion criteria included moderate or severe learning disability; serious risk of violence to researchers; current major depression, psychosis, mania or hypomania, or a past history of bipolar disorder or schizophrenia; and drug-seeking behaviour that was of sufficient severity to affect the titration protocol. Intervention The intervention was overencapsulated OROS-methylphenidate (18 mg) or placebo capsules. Trial medication was titrated weekly for 5 weeks against symptom reduction and adverse effects to a final dose of one to four capsules per day, followed by a stable dose for 3 weeks. Main outcome measures The primary outcome was ADHD symptoms at 8 weeks using the investigator-rated Conners’ Adult ADHD Rating Scale-Observer. There were 13 secondary outcomes, including measures of emotional dysregulation, general psychopathology, reports of behaviour by prison staff and engagement with educational activities. Results For the primary outcome, the estimated improvement between the OROS-methylphenidate and placebo arms was 0.57 points on the Conners’ Adult ADHD Rating Scale-Observer (95% confidence interval –2.41 to 3.56) at 8 weeks, with a standardised effect size of 0.06. The difference was not statistically significant and was smaller than the difference the trial was powered to detect. Responder rate, defined as a 20% reduction in the Conners’ Adult ADHD Rating Scale-Observer score, was 48.3% for the OROS-methylphenidate arm and 47.9% for the placebo arm. None of the 13 secondary outcomes that could be formally compared between the trial arms showed a significant effect and no mediators of change in behaviour were identified. Limitations Low adherence to trial medication and low medication dose might have affected the results. Conclusion OROS-methylphenidate was not found to have an effect, compared with placebo, on the primary and secondary outcomes investigated. The findings indicate that ADHD symptoms do not respond to a standard treatment for ADHD following titration to low doses in young adults in prison. The findings do not support the routine treatment with OROS-methylphenidate of young adult prisoners meeting diagnostic criteria for ADHD. Future research Investigations of adequate, maintained dosing, non-pharmacological interventions and community studies are suggested. Trial registration This trial is registered as ISRCTN16827947 and EudraCT 2015-004271-78. Funding This project was funded by the Efficacy and Mechanism Evaluation (EME) programme, a MRC and National Institute for Health and Care Research (NIHR) partnership. Janssen-Cilag Ltd supplied OROS-MPH (Concerta-XL). This will be published in full in Efficacy and Mechanism Evaluation; Vol. 9, No. 6. See the NIHR Journals Library website for further project information.
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Ismayilov, Rasim T., Vagif M. Kаrimov e Shura A. Ganbarova. "Low-temperature oxidation of sulphide ores of sulphide-polymetallic deposits of Azerbaijan". Journal of Geology, Geography and Geoecology 32, n. 1 (9 aprile 2023): 52–58. http://dx.doi.org/10.15421/112306.
Testo completoAbstract (sommario):
The article presents the results of experimental studies to determine the oxidative ac- tivity for the main industrial types of sulphide ores of sulphide-polymetallic deposits in Azerbai- jan. To calculate the amount of heat generated during oxidation, the dependences of the oxygen absorption rate on the temperature and moisture of the ore were established. It was found that with an increase in temperature above 50-80oC, absorption of oxygen slows down with time faster than at low (2.5-50oC) temperatures. If with an increase in temperature from 2.5 to 45-50oC the amount of absorbed oxygen increases by 7.5-12 times, then at a temperature from 45-50oC to 80oC it increases only by 3.6-3.7 times, which is explained by a decrease in moisture of the ore with an increase in temperature, due to evaporation. The time dependence of absorption rate of the oxygen for sulphide ores of sulphide-polymetallic deposits of Azerbaijan has a clearly pronounced break, which indicates a change in the oxidation mechanism. The oxidizing activity of sulphide ores of sulphide-polymetallic deposits of the Balakan ore field of Azerbaijan at low temperatures (2.5-800C) was studied. Determination of the oxidative activity of the main industrial types of sulphide ores of sulphide-polymetallic deposits in Azerbaijan makes it possible to classify ore reserves according to the degree of tendency to spontaneous combustion, which will allow a scientifically sound approach to planning the sequence of their development and designing mines. In addition, the article presents the results of experimental studies to determine the oxidizing activity of the sulfide ores of the Katsdag, Filizchay and Katekh deposits, carried out in laboratory conditions by the method of Institute of Mining named after A.A. Skochinsky. An indicator of oxidative activity is the oxygen absorption rate constant and labeled by the letter U (ml/g hour). The results of laboratory studies show that the oxidation of the ore leads to an increase in temperature and ignition and depends on a large number of factors such as mineralogical composition, chemical activity, humidity, temperature, fragmentation, etc. The dependence of the total amount of oxygen absorbed by sulphide ores on time at various temperatures is obtained. It has been estab- lished that with increasing temperature, the rate of oxygen absorption by sulphide ores increases. The values of the temperature coefficient (Kt < 2.0) in the temperature range of 2.5-800C show that the rate of the oxidation of sulfide ore is controlled by oxygen diffusion, and not by the rate of the chemical reaction. With equal fragmentation and equal distribution of chemical elements in ore samples, the oxidation rate is directly proportional to the outer surface of the sulphide ore.
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Kaumetova, D. S., I. D. Arystan, H. K. Absalyamov, K. K. Zhusupova, A. D. Zhukenova e G. S. Abisheva. "Research into heap leaching technology of gold-bearing ores at the Vasilkovsky gold ore deposit (Kazakhstan)". Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, n. 2 (30 aprile 2022): 17–22. http://dx.doi.org/10.33271/nvngu/2022-2/017.
Testo completoAbstract (sommario):
Purpose. To study gold-bearing ores subjected to heap leaching technology to identify both free gold particles, as well as gold in aggregates and adhesions, which makes it possible to obtain data on the distribution of gold by its occurrence forms. Methodolgy. Leaching process studies are conducted at the laboratory setup of the Institute of Metallurgy and Ore Beneficiation of the Ministry of Education and Science of the Republic of Kazakhstan. The gold particles are studied using an AxioScope A1 optical microscope on the polished thin section surface. The sample materials are taken from the heap leaching site of the Vasilkovsky gold ore deposit. Findings. As a result of a microscopic test of a sample taken from the heap leaching site, ultrafine-dispersed and finely-dispersed gold particles have been found both in free form and in aggregates with waste rock and arsenical pyrite, as well as the fact of Au particles adhesions, accumulated on a grain of the host waste rock. The size class of detected Au particles varies from 0.35 to 9.5 m. Originality. For the first time, according to the samples of gold-bearing ores of the Vasilkovsky gold ore deposit, a pattern of the gold distribution according to the forms of its occurrence has been revealed. Practical value. The data obtained as a result of the research make it possible to predict the distribution of the gold form occurrence in other areas of the deposit. This can greatly simplify the conditions for its development, as well as adjust the technological process of leaching the gold-bearing ores and the main technological parameters of the heap leaching process.
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SANAKULOV, Kuvondik, Alexander VOROBYOV, Evgeny KOZYREV e Zhang LIANZI. "Physical and chemical properties of gold nanoparticles in ores and catalysts". Sustainable Development of Mountain Territories 14, n. 4 (30 dicembre 2022): 676–84. http://dx.doi.org/10.21177/1998-4502-2022-14-4-676-684.
Testo completoAbstract (sommario):
Introduction. At present, in the instrumental study of the mineral forms of finding gold in geogenic and technogenic ores, more and more attention has been paid to free gold, with a size of several nanometers. Such gold has been found in almost all types of its geogenic ores: starting with deposits of primary sulfide ores and ending with various gold-bearing placers. A similar situation is observed with technogenic gold-bearing ores accumulated in numerous dumps and tailings. At the same time, with the increase in research on nanogold, not only its fundamental, but also practical importance grows, because. in theoretical and applied research, more and more of its actual physical and chemical properties and previously unknown phenomena and effects accompanying them are discovered and clarified. Research methods and materials. An important aspect is the instrumental study of the geometry of various forms of nanogold occurrence in natural (geogenic) and technogenic ores and minerals. The instrumental and analytical part of our research was based on the visualization of nanoparticles obtained from the Nanjing Research Institute of the Chemical Industry under Sinopec (PRC), carried out on a JEOL 2010F microscope. Research results. The studied gold nanoparticles were presented in the form: • spherical fullerene-like monoparticles; • fullerene-like gold cells, consisting of a different number (from 13 to 20 clusters) of gold nanoparticles; • self-organized «fractal» dendrites; • rather complex composites with the participation of nanogold; • various aggregates of nanoparticles, etc. The concentrations of gold nanoparticles vary significantly from one deposit to another and between individual ore facies (even within the same deposit). Discussion of the obtained results. It was found that nanogold can be contained in arsenopyrites in 2 main forms: a) as a structurally bound solid solution (Au + 1) located in the lattice of this mineral; b) in separate mineral inclusions of submicron size or nanoparticles. Gold nanoparticles (5-10 nm in size) detected in arsenopyrite in concentrations up to 4% mass fraction are sufficiently representative to account for their amount in gold-bearing ores. A gold nanoparticle with a size of 3 nm usually has an average coordination number CN = 9.5, similar nanoparticles with a size of 1 nm have an average CN = 6, and nanoparticles with a size of 0.5–1 nm have an average CN = 3.6. Conclusion. To date, a nanoparticle catalyst has been developed in which gold clusters are attached to metal oxides that are semiconductors. At the same time, their number is very limited and includes only Fe2O3, TiO2, CeO2, and MgO compounds, which can be used not only in the form of nanoparticles, but also nanofilms. Such an innovative nanocatalyst ensures the efficient flow of a number of oxidative and other processes with hydrocarbons at normal temperatures, which is difficult to achieve by other methods. Findings. The article presents the results of studies of the physicochemical properties of gold nanoparticles installed in ores and catalysts. The morphology of gold nanoparticles has been established. The character of gold speciation in various sulfides is determined. The presence of gold nanoparticles in ores and rocks in the state of colloids has been confirmed. The catalytic activity of nanoparticles of various shapes and chemical states was revealed, depending on the values of the ambient temperature. The results of the research can be useful in the enrichment of gold-bearing ores of upland deposits.
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Ariel, N., A. Zvi, K. S. Makarova, T. Chitlaru, E. Elhanany, B. Velan, S. Cohen, A. M. Friedlander e A. Shafferman. "Genome-Based Bioinformatic Selection of Chromosomal Bacillus anthracis Putative Vaccine Candidates Coupled with Proteomic Identification of Surface-Associated Antigens". Infection and Immunity 71, n. 8 (agosto 2003): 4563–79. http://dx.doi.org/10.1128/iai.71.8.4563-4579.2003.
Testo completoAbstract (sommario):
ABSTRACT Bacillus anthracis (Ames strain) chromosome-derived open reading frames (ORFs), predicted to code for surface exposed or virulence related proteins, were selected as B. anthracis-specific vaccine candidates by a multistep computational screen of the entire draft chromosome sequence (February 2001 version, 460 contigs, The Institute for Genomic Research, Rockville, Md.). The selection procedure combined preliminary annotation (sequence similarity searches and domain assignments), prediction of cellular localization, taxonomical and functional screen and additional filtering criteria (size, number of paralogs). The reductive strategy, combined with manual curation, resulted in selection of 240 candidate ORFs encoding proteins with putative known function, as well as 280 proteins of unknown function. Proteomic analysis of two-dimensional gels of a B. anthracis membrane fraction, verified the expression of some gene products. Matrix-assisted laser desorption ionization-time-of-flight mass spectrometry analyses allowed identification of 38 spots cross-reacting with sera from B. anthracis immunized animals. These spots were found to represent eight in vivo immunogens, comprising of EA1, Sap, and 6 proteins whose expression and immunogenicity was not reported before. Five of these 8 immunogens were preselected by the bioinformatic analysis (EA1, Sap, 2 novel SLH proteins and peroxiredoxin/AhpC), as vaccine candidates. This study demonstrates that a combination of the bioinformatic and proteomic strategies may be useful in promoting the development of next generation anthrax vaccine.
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Baranov, L. N., e A. V. Tolstov. "Typomorphic features of magnetite from tomtor massif camaphorites". Proceedings of higher educational establishments. Geology and Exploration 63, n. 6 (20 giugno 2022): 66–76. http://dx.doi.org/10.32454/0016-7762-2020-63-6-66-76.
Testo completoAbstract (sommario):
Background. The paper presents new data on the material composition and formation conditions of apatite-magnetite rocks (phoscorite and camaphorites) from the Onkuchakh deposit within the Tomtor massif drawing on the study into the typomorphic features of magnetite.Aim. To study the morphology, chemical composition, and relations of magnetite with associated minerals in apatite-magnetite rocks from the Onkuchakh deposit (Tomtor massif).Materials and methods. The study employed core samples measuring 177 m in total length (borehole No. 801, Onkuchakh field, Tomtor massif). In order to determine the composition of recovered minerals, the following instruments were used: JEOL JXA-8230 Electron Probe Microanalyzer (ALROSA, Mirny, Russia); TESCAN MIRA 3 LMU field emission scanning electron microscope equipped with an Oxford Instruments INCA Energy 450+ energy dispersive spectrometer with an XMax-80 detector (ALROSA, Mirny; V. S. Sobolev Institute of Geology and Mineralogy, SB RAS). The measurements were performed according to a standard procedure: accelerating voltage — 20 kV; current — 1 nA; counting time — from 60 s; probe size — 2 μm. Instrument calibration was carried out using a set of characterized artificial compounds and natural minerals; instrument stability was confirmed by measuring Co line intensity.Results. The authors identified the textural and structural features of magnetite ores, as well as ascertaining their relations with the areas of camaphorites characterized by different material composition and host rocks. The impact of superimposed hydrothermal processes was determined. In addition, a detailed morphological characterization was provided for magnetite found to comprise two generations: primary magmatic magnetite and that transformed under the influence of superimposed processes. Finally, representative data on the chemical composition of magnetite were obtained.Conclusion. It is concluded that magnetite is formed through a magmatic process involving crystallization differentiation. The occurrence of noble metal is shown to be related to hydrothermal processes superimposed on magnetite ores. The role of apatite-magnetite ores in the formation of the supergene complex — ferrous phosphate lateritic weathering crusts of the Tomtor massif — is confirmed. It is recommended to consider camaphorites from the Tomtor massif as naturally alloyed iron ores potentially extracted along with a number of valuable components.
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Morozova , T. P., E. V. Karelina e V. E. Markov. "Forecast of the morphology and occurrence conditions of complex chromite ore bodies (on example of Labogeyskoe-2 site, Polar Urals)". Proceedings of higher educational establishments. Geology and Exploration, n. 2 (17 ottobre 2022): 31–38. http://dx.doi.org/10.32454/0016-7762-2022-64-2-31-38.
Testo completoAbstract (sommario):
Background. Chromium ores are confined to stratified massifs of basic and ultra-basic composition. The Voikaro-Sinyinsky massif is part of the main hyperbasite belt of the Urals. Inside the hyperbasites of this massif, at the boundaries of tectonic flakes in particular, ultra-basic metamorphites are developed, constituting the zones of sharply variable thickness. During survey routes, a mechanical halo of scattering of ore fragments was found. When studying the ore stockpile, ditches opened the Labogeyskoe-2 chromite ore body, which belongs to the Pogureysky block of the Voikaro-Sinyinsky massif. In the ore occurrence area, harzburgites are predominantly developed with thin striped dunite aggregates in a small volume and individual dunite bodies of low thickness. Chromium ores are densely impregnated, medium- to coarse-grained. The amount of chromospinelides in the composition of ores сonstitutes 90—95%, the serpentine of irregular shape as well as the relics of olivine and emerald-green uvorovite grains, along with the single grains of pyrrhotite and magnetite are found in the interstitia (2—5%). Ores are massive, often cataclazed. The experience of studying this ore occurrence can serve as an analogue for a more effective study of similar ore occurrences. Aim. Evaluation of the Labogeyskoye-2 ore occurrence for the application of the information obtained and methods of its study in the study of a similar Levopayersk ore body, which will help save time and finances in the design and more efficient exploration.Materials and methods. During the filming routes, a mechanical halo of scattering of ore fragments was detected. During the study of the ore collapse in 1966, the KM22—KM25 ditches were passed and the Labogeyskoye-2 chromite ore body was uncovered by the KM24 ditch. In 2013, during geological exploration at Labogeyskoye-2, 3 ditches (K50—K52) were passed and detailed gravimagnetic studies of Institute of Mineralogy, Geochemistry and Crystal Chemistry of Rare Elements in 2011—2012 were performed.Results. The Levopayerskoe ore body is probably the closest analogue of the Labogeyskoye-2 ore occurrence among the 24 ore occurrences, for which geological plans and calculation sections were compiled based on the results of mining and drilling operations.Conclusions. The closest analogue of the Labogeyskoye-2 ore occurrence is probably the Levopayerskoye ore body. Therefore, further geological and exploration work at the Labogeyskoe-2 site should be carried out taking into account the conditions of occurrence of the similar Levopayerskoe ore body.
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Kiss, Viktória. "Transformations of Metal Supply during the Bronze Age in the Carpathian Basin". Hungarian Historical Review 9, n. 2 (2020): 315–30. http://dx.doi.org/10.38145/2020.2.315.
Testo completoAbstract (sommario):
This paper presents recent research questions which have been raised and methods which have been used in the study of Bronze Age metallurgy in connection with available natural resources (ores) in and around the Carpathian Basin. This topic fits in the most current trends in the research on European prehistoric archaeology. Given the lack of written sources, copper and bronze artifacts discovered in settlement and cemetery excavations and prehistoric mining sites provide the primary sources on which the studies in question are based. The aim of compositional and isotope analysis of copper and tin ores, metal tools, ornaments, and weapons is to determine the provenience of the raw materials and further an understanding of the chaine operatiore of prehistoric metal production. The Momentum Mobility Research Group of the Institute of Archaeology, Research Centre for the Humanities studies these metal artifacts using archaeological and scientific methods. It has focused on the first thousand years of the Bronze Age (2500–1500 BC). Multidisciplinary research include non-destructive XRF, PGAA (promptgamma activation), TOF-ND (time-of-flight neutron diffraction) analyses and neutron radiography, as well as destructive methods, e.g. metal sampling for compositional and lead isotope testing, alongside archaeological analysis. Microstructure studies are also efficient methods for determining the raw material and production techniques. The results suggest the use of regional ore sources and interregional connections, as well as several transformations in the exchange network of the prehistoric communities living in the Carpathian Basin.
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Znamensky, Sergei Evgenievich, e Nina Michailovna Znamenskaya. "Ree patterns for ore pyrite and host rocks of the orogenic gold deposit Mindyak (Souhern Urals)". Geologicheskii vestnik, n. 1 (25 marzo 2024): 39–49. http://dx.doi.org/10.31084/2619-0087/2024-1-3.
Testo completoAbstract (sommario):
The aim of the research is to study the factors that controlled the fractionation of rare-earth elements in ore pyrite and to assess, on this basis, possible sources of matter in gold-sulfide ores of the Mindyak deposit (Southern Urals), the genesis of which is a controversial problem. The mineralization of the orogenic type deposit is localized in a polymictic olistostrome with carbonaceous clayey-siliceous cement
Determination of REE contents was carried out in ore pyrite and in the host rocks using inductively coupled plasma mass spectrometry (ICP-MS) on an ELAN 9000 mass spectrometer (Perkin Elmer) at the Institute of Geology and Geochemistry UB RAS.
In the early pyrite and late polysulfide-carbonate-quartz ore associations of the deposit, two types of pyrite were found. The REE patterns in one of them inherit the peculiarities of the composition of lanthanides in the carbonaceous shales of the olistostrome cement, and in the other, in their varieties enriched in syngenetic globular pyrite mineralization. The behavior of REE in pyrite and the fluid coexisting with it was also influenced by temperature, oxidation-reduction conditions and alkalinity of the mineral formation environment. Pyrite of the early ore association, crystallized under high-temperature reducing conditions from a fluid of increased alkalinity, has higher concentrations of lanthanides compared to the low-temperature pyrite of late polysulfide-carbonate-quartz ores. It was found that in the low-temperature environment of the late ore stage there was a slight oxidation and a decrease in the alkalinity of the fluid.
Fractionation of REE in ore pyrite from the Mindyak deposit is mainly associated with the processes of mobilization of components from the olistostrome cement by the mineral-forming fluid, which can be considered as one of the sources of ore matter.
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Oahimire, Debrah Memshima, Victor Uchechi Ukaegbu e Joel Friday Ogbonna. "Assessment of some baryte ores from Northern Cross-River, Nigeria, for oilfield drilling fluid supplement". Journal of Degraded and Mining Lands Management 9, n. 1 (1 ottobre 2021): 3015–26. http://dx.doi.org/10.15243/jdmlm.2021.091.3015.
Testo completoAbstract (sommario):
There is a very high demand for the American Petroleum Institute (API) grade baryte in Nigeria due to the continuous massive drilling in oil and gas fields. Considering the presumption that local baryte is of low quality, processed baryte is imported, leading to great national revenue losses. Some baryte deposits in the Northern Cross River, Nigeria were sampled and studied in field and laboratories, based on API standard requirements (2004 and 2010), to ascertain their suitability for use as weighting additive in drilling fluids. Furthermore, flame testing of the samples yielded yellowish-green flame indicating barium presence; X-ray diffraction (XRD) and X-Ray fluorescence (XRF) analyses confirmed the mineralogy and chemical composition of the samples, respectively. The results revealed the Specific Gravity, SG range of 4.37 to 4.52; concentration of alkali earth metals as calcium 8.40mg/kg to 62.10mg/Kg; the residue >75micron and particle sizes <6microns processed had normal range, respectively below 3% and 30%; and the samples’ BaSO4 %weightcomposition was over 90%. The chemical analysis indicated no significant undesired minerals. Galena gangue with baryte was observed in three locations though these could be easily beneficiated through physical separation. The tests and analyses result qualified the Northern Cross River baryte samples as high-grade API standard baryte, suitable for oilfield drilling fluid. Further estimation of the baryte reserves in this region was highly recommended, as this might proffer a substantial solution to the sustainable supply of excellent local quality drilling baryte in Nigerian oilfields.
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Dmitriev, A. N., G. Yu Vit’kina, R. V. Petukhov, S. A. Petrova e Yu A. Chesnokov. "Estimation of indices of BF heat of titanium-magnetite concentrates with different titanium dioxide content". Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 75, n. 2 (10 marzo 2019): 154–65. http://dx.doi.org/10.32339/0135-5910-2019-2-154-165.
Testo completoAbstract (sommario):
Russia owns world largest reserves of titanium- magnetite and ilmenite- titanium- magnetite ores. Following the stepby-step inclusion into metallurgical processing of titanium- magnetite raw materials, the matter of maximum extraction of iron, vanadium and titanium becomes more and more actual. Kachkanar group of deposits of titanium- magnetite ores consists of two deposits: Gusevgoskoe and Sobstvenno-Kachkanar. At present JSC EVRAZ NTMK uses titanium- magnetite sinter and pellets, produced of Gusevgorskoe deposit ores. To make up the dropped out capacities and to keep the volume of mined ore at the level of 55 m t/year, it is planned to put into operation the reserved Sobstvenno-Kachkanar deposit. To process the titanium- magnetite ores of this deposit, their specific peculiarities should be taken into consideration. In particular, the increased TiO2content in iron ore concentrate up to 3.4% might require corrections of the BF technology. In this connection a study of metallurgical properties of lump iron ore raw materials with different titanium dioxide content was carried out. To clarify the pellets phase components a method of X-ray-phase analysis was used. The studies were done at CKP “Ural-M” equipment in the Institute of Metallurgy, Ural branch of Russian academy of Sciences. It was determined that pellets chemistry was represented by hematite (from 77 up to 89%), magnetite (from 2.84 up to 10.44%), complicated diopside (from 2 up to 10%), as well as in a small amount by quartz, hedenbergite, corundum, rutile, ferro-periclase, ilmenite, wollastonite, α-Fe, wustite. Results of viscosity calculation of obtained slags showed that it is within a range, typical for real BF slags viscosity. The obtained values of slag viscosity do not offer problems with slag regime of BF heat. It was shown, that increase of titanium dioxide content in pellets does not give rise to quality deterioration of iron ore raw materials preparation to BF heat as volume of introduced concentrate with increase TiO2content into the materials is increasing. Increase of hot strength and pellets temperature of beginning of softening, the pellets having increased titanium dioxide content, will positively affect main technical and economic indices of BF heat – coke rate and productivity, that was confirmed by BF indices calculation by application of balance logical and statistical model of BF process.
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Liu, Mei Hua, Yi Qiang Liang, Sheng Jian e Xu Dong Zhang. "Flotation of a Copper-Lead Sulfide-Oxide Ore：Using a Combined Depressant for Galena and an Effective Activator D2 for Copper Oxide Minerals". Advanced Materials Research 634-638 (gennaio 2013): 3368–74. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.3368.
Testo completoAbstract (sommario):
The properties of a Cu-Pb oxide ore are investigated by XRD and SEM. Results show that the ore is characterized by chalcocite, galena, azurite and cerusite. Copper and lead phases analysis show that the oxidation rates of copper and lead are up to 70% and 72%, respectively. In order to get a good flotation performance for the difficult-to-treat ore, an efficient flotation technology of bulk flotation of Cu-Pb sulfides，separation of Cu-Pb sulfides, copper and lead oxides flotation has been developed. By applying the combined depressants (sodium thiosulfate + peroxide), activator Disulhydroxybenzen Thiodiazole (developed by Kunming Metallurgy Research Institute) in copper oxide flotation and sodium sulfide in flotation of lead oxide, chalcocite and galena can be separated and the Cu-Pb oxides can be activated. Results in closed circuit test show that when the feed assays 0.59% Cu, 2.40% Pb and 39.87 g/t Ag, marketable copper sulfide and oxide concentrates, lead sulfide and oxide concentrates can be obtained. At the same time, silver got enriched in the concentrates too. This study is expected to give a technical support in utilizing this complex Cu-Pb oxide ores.
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Varga, Sándor, e Lajos Juhász. "Presence, feeding and health status of collared doves (Streptopelia decaocto Friv. 1838) on animal breeding farms". Acta Agraria Debreceniensis, n. 21 (23 maggio 2006): 49–54. http://dx.doi.org/10.34101/actaagrar/21/3173.
Testo completoAbstract (sommario):
In the course of our examinations we were determining the gender of collared doves (Streptopelia decaocto) feeding at animal breeding farms by biometric data. We were estimated their nourishment and necropsies were carried out.We compared the results of the nutrition analysis with similar data of collard doves feeding at agricultural areas.We analyzed the crop and gizzard content and recorded the body proportions of collard doves that were captured between December of 2004 and August 2005. In the course of the necropsy examinations we did parasitological, bacteriological examinations as well as examinations for the detection of Newcastle disease. In the course of the gender analysis of the collard doves that were collected at animal breeding farms, both the wing length and the length of the third quill-feather has shown a significantly greater value in the case of males (p>0.05).From the orts found in the crop and gizzard it has been stated that the feed consumed the most was corn (80.77% m%). The collared doves consumed much less other cereal seeds (wheat 0.82%, barley 1.26%).In the course of the necropsy examinations done in the Veterinary Institute of Debrecen, the birds proved to be free of parasites, and the results of the Salmonella and Newcastle disease analysis were negative as well. E. coli bacteria had been detected in the liver of not more than three birds.
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Dam G., Oscar. "Model for the approximate assessment of nitrogen content in swollen reduced iron ore from single measurements". Athenea 2, n. 3 (7 marzo 2021): 47–53. http://dx.doi.org/10.47460/athenea.v2i3.16.
Testo completoAbstract (sommario):
A method of calculation has been derived to assess the nitrogen estimated content in iron reduced samples. The method is based on the review of observations and laboratory measurements of relationships between the rate of reduction and the corresponding metallic iron formation during the reduction process. The metallic iron formation has been calculated from relationships that apply to a wide variety of types of ores undergoing reduction under a nitrogen-containing gas mixture in proportions above 50% by volume. The empirical correlations found between the rates of metallization, the sample swelling index, and the equilibrium nitrogen solubility in iron can be used for determined the approximate final content of nitrogen in the reduced samples from the estimated and measured final volume of the reduced specimens. It is necessary to have an accurate analysis of the starting sample as well as the reducibility information.
Keywords: Iron ore, nitriding, catastrophic swelling, rate of metallization, reduction degree.
[1]M. Kumar, B. Himanshu & S. Kumar. “Reduction and Swelling of Fired Hematite Iron Ore Pellets by Non−coking Coal Fines for Application in Sponge Ironmaking”. Mineral Processing and Extractive Metallurgy Review- MINER PROCESS EXTR METALL REV. 34. 10.1080/08827508.2012.656776. 2012.
[2]I. Mikko, M. Olli, A. Tuomas, V. Ville-Valtteri, K. Jari, P. Timo & F. Timo. “Dynamic and Isothermal Reduction Swelling Behaviour of Olivine and Acid Iron Ore Pellets under Simulated Blast Furnace Shaft Conditions”. ISIJ International. 52. 1257-1265. 10.2355/isijinternational.52.1257. 2012.
[3]M. Kumar. “Study of reduction kinectics of iron ore pellets by noncoking coal”. Thesis of Master. National Institute of technology, Rourkela. 2009.
[4]O. Dam. “The Influence of Nitrogen on the Swelling Mechanism of Iron Oxides During Reduction”. PhD Thesis .Univ. of London. 1983.
[5]O. Dam and J. Jeffes. “Model for the Assessment of Chemical Composition of reduced iron ores from single measurements”. Ironmaking and Steelmaking Journal. Vol. 14, N`5. 1987.
[6]O. Dam. “Efecto de la descomposición de gas de amoniaco (NH3) sobre el hinchamiento de óxidos de hierro durante reducción”. UCT Journal. Vol 100, 24. May 2020.
[7]R. Agarwal and S. Hembram. “To Study the Reduction and Swelling Behavior Iron Ore Pellets”. BSc. Department of Metallurgical and Materials Engineering National Institute Of Technology, Rourkela. May 2013
[8]Z. Chen , C. Zeilstra , J. Van der Stel , J. Sietsma & Y. Yang. “Review and data evaluation for high-temperature reduction of iron oxide particles in suspension”. Ironmaking & Steelmaking. Vol. 47. N°7. pp. 741-747. 2019.
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Chaerun, Siti Khodijah, Ronny Winarko e Frideni Yushandiana. "Biohydrometallurgy: Paving the Way for a Greener Future of Mineral Processing in Indonesia". Current Research on Biosciences and Biotechnology 5, n. 1 (31 agosto 2023): 299–307. http://dx.doi.org/10.5614/crbb.2023.5.1/8kiz3aoe.
Testo completoAbstract (sommario):
Biohydrometallurgy has been around since the 1960s, and it uses microorganisms to facilitate the extraction of metals. As environmental rules get stricter and the quality and complexity of ore available for processing decrease, this technology presents an alternate option for mineral processing. Several countries, including South Africa, Russia, Chile, Australia, the United States, China, Burma, New Zealand, Peru, Uzbekistan, and Ghana, have used this method commercially in copper processing plants and gold and silver processing plants. In Indonesia, this approach has neither been developed nor implemented on an industrial basis. In Indonesia, biohydrometallurgical processing is worth proposing as a solution to future mineral processing issues, particularly the problem of limited capital and low-grade ore processing. Globally, a significant amount of focus is placed on the investigation of biohydrometallurgy. However, only the Bandung Institute of Technology (ITB) does biohydrometallurgy-related research in Indonesia. This investigation began in 2009 for the extraction of nickel from laterite ores. Additional research has also been conducted on the extraction of metals such as copper and gold. The research findings thus far have generated an intriguing and highly potential outlook that can be scaled up through a pilot plant and industrialized in Indonesia.
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Barba, Clarides Henrich de, e Ana Paula Batista Lopes. "A Educação Ambiental mediada pelas tecnologias da informação e comunicação no Instituto Federal do Amazonas – Campus Humaitá (Environmental Education mediated by information and communication technologies at the Federal Institute of Amazonas - Humaitá Campus)". Revista Eletrônica de Educação 14 (15 gennaio 2020): 3768014. http://dx.doi.org/10.14244/198271993768.
Testo completoAbstract (sommario):
This research has by objective investigate how the Technologies Information and Communication (ICT) that can be used in the learning process of the environment education with students the 2nd year of the course technical teaching integrated to high school of the Federal Institute of Education, Science and Technology of Amazonas - IFAM Campus of Humaitá (Brazil). The theoretical framework used was based on authors from Environmental Education as well as on Information and Communication Technologies in Environmental Education. The use of ICTs and their pedagogical contributions was investigated through bibliographic research. The methodology used was qualitative in research the form action through lectures and workshops with students carry out a questionnaire to diagnose the students' knowledge of ICT they own. Through the importance the environmental care as well as the disposal of solid waste, in school and outside. The results indicate that the students have knowledge of ICT, they use them of conscientious form and respect environmental. Thus, through the use of ICT, the students develop a reflection on the importance of Environmental Education for the conservation of the environment, as well as the use of technological resources for a better quality of life.ResumoEsta pesquisa tem por finalidade investigar como as Tecnologias da Informação e Comunicação – (TICs) podem ser utilizadas no processo da aprendizagem da Educação Ambiental, com estudantes do 2º ano do curso Técnico em Informática Integrado ao Ensino Médio, do Instituto Federal de Educação, Ciência, Tecnologia do Amazonas – IFAM Campus Humaitá. O referencial teórico utilizado foi baseado em autores da Educação Ambiental bem como nas Tecnologias de Informação e Comunicação na Educação Ambiental. Investigou-se, por meio da pesquisa bibliográfica, a utilização das TICs e suas contribuições pedagógicas. A metodologia utilizada foi a pesquisa qualitativa na forma de pesquisa-ação por meio de palestras e oficinas com estudantes, e a aplicação de um questionário para diagnosticar quais conhecimentos eles detinham sobre essas tecnologias. Abordou-se a relevância do cuidado com o meio ambiente visando à sensibilização ambiental, assim como o descarte de resíduos sólidos, tanto na escola quanto fora dela. Os resultados apontam que os educandos possuem conhecimentos sobre as TICs e as utilizam de forma consciente em respeito ao meio ambiente. Desse modo, por meio da utilização das tecnologias, os estudantes desenvolvem uma reflexão sobre a importância da Educação Ambiental para a conservação do meio ambiente, assim como o uso dos recursos tecnológicos para uma melhor qualidade de vida.Palavras-chave: Educação ambiental, Tecnologia da informação e da comunicação, Práticas pedagógicas.Keywords: Environmental education, Information and communication technology. Pedagogical practices.ReferencesBARBA, Clarides Henrich de. “Ambientalização curricular” no ensino superior: o caso da Universidade Federal de Rondônia, campus de Porto Velho. 2011, 310 f., Tese (Doutorado em Educação Escolar), Universidade Estadual Paulista, Faculdade de Ciências e Letras, Campus de Araraquara, 2011.BARDIN, Laurence. Análise de conteúdo. Lisboa: Edições 70, 1977.BONELLI, Cláudia Maria Chagas. Meio ambiente, poluição e reciclagem, 2 ed., São Paulo: Blucher, 2010.BONILLA, Maria Helena Silveira. Software Livre e Educação: uma relação em construção. Perspectiva, Florianópolis, v. 32, n. 1, 205-234, jan./abr. 2014.CARVALHO, Isabel de Moura. A invenção do sujeito ecológico. Sentidos e trajetórias em Educação Ambiental. Porto Alegre: Editora da UFRGRS, 2001.CARVALHO, Luiz Marcelo. A Temática Ambiental e o Processo Educativo: dimensões e abordagens. In: CINQUETTI, Heloisa Chalmers Sisla; LOGAREZZI, Amadeu. Consumo e Resíduos - Fundamentos para o trabalho educativo. São Carlos: EdUFSCar, 2006, p. 18-41.CASTELLS, Manuel. A sociedade em redes. 8. ed., São Paulo: Paz e Terra, 2000.COSTA, Elenice dos Santos; DE CARLI, Ana Alice; SANTOS, Daniele da Costa Rubim Messeder dos. Educação Ambiental consciente por meio do uso das tecnologias da informação e comunicação no processo ensino-aprendizagem. Setembro de 2016, p.8. Disponível em: http://www.meioambientepocos.com.br/anais-2016. pdfGIROTO, Cláudia Regina Mosca; POKER, Rosimar Bortolini; OMOTE, Sadao. As tecnologias nas práticas pedagógicas inclusivas. Marília. Oficina Universitária; São Paulo. Cultura Acadêmica, 2012.GOMES, José Ferreira. A tecnologia na sala de aula. Novas tecnologias e educação: Ensinar a aprender, aprender a ensinar (Organizadores: Fátima Vieira e Maria Teresa Restivo). Biblioteca Digital da Faculdade de Letras da Universidade do Porto. 2014. Pp. 17-44. Disponível em: <http://ler.letras.up.pt/uploads/ficheiros/13021.pdf> Acesso em 25 de Julho de 2017.LÉVY, Pierre. Tecnologias da Inteligência - O Futuro do Pensamento da Humanidade na Era da Informática. 1993. Disponível em: <http://wp.ufpel.edu.br/franciscovargas/files/2015/03/LEVY-Pierre-1998-Tecnologiasda-Intelig%C3%AAncia.pdf> Acesso em: 04 dez.2017.MORAN, José Manuel. Os novos espaços de atuação do Professor com as tecnologias. Revista Diálogo Educacional, Curitiba, v. 4, n.12, p.13-21, maio/ago. 2004. Disponível em: <http://www.pucrs.br/famat/viali/tic_literatura/artigos/189117821002.pdf> Acesso em 10 de Agosto de 2017.OLIVEIRA, Cláudio de; MOURA, Samuel Pedrosa. TIC’s na educação: a utilização das tecnologias da informação e comunicação na aprendizagem do aluno. 2015. Disponível em: <http://periodicos.pucminas.br/index.php/pedagogiacao/article/viewFile/11019/8864> Acesso em 04 de Agosto de 2017PONTES, Elivelton. O que é e como fazer um mapa mental?, 2017. Disponível em: https://eadbox.com/mapa-mental/> Acesso em 20 de Novembro de 2017.PRETTO, Nelson De Luca. Reflexões: ativismo, redes sociais e educação. Salvador: EDUFBA, 2013.RAMOS, Sérgio. Tecnologias da Informação e Comunicação: conceitos básicos. Portugal, 2008. Disponível em: <http://livre.fornece.info/media/download_gallery/recursos/conceitos_basicos/TIC-Conceitos_Basicos_SR_Out_2008.pdf> Acesso em 20 de Julho de 2017.RODRIGUES, Gelze Serrat de Souza Campos; COLESANTI, Marlene T. de Muno. Educação Ambiental e as novas tecnologias de informação e comunicação. Sociedade& Natureza, Uberlândia, 20 (1): 51-66, jun. 2008. Disponível em: <http://www.seer.ufu.br/index.php/sociedadenatureza/article/viewFile/9398/5743> Acesso em 30 de Julho de 2017.SEABRA, G.; MENDONÇA, I., (Eds.). Educação ambiental: Responsabilidade para a conservação da sociobiodiversidade. João Pessoa: Editora Universitária, 2011.SERAFIM, Maria Lúcia; SOUSA, Robson Pequeno de. Multimídia na educação: o vídeo digital integrado ao contexto escolar. In: SOUSA, Robson Pequeno de; MOITA, Filomena da M. C da S. C.; CARVALHO Ana Beatriz Gomes (Orgs). Tecnologias digitais na educação. Campina Grande: EDUEPB, 2011.SORRENTINO, Marcos et al. Educação Ambiental como política pública. Educação e Pesquisa, São Paulo, v. 31, n. 2, p. 285-299, maio/ago. 2005. Disponível em: <http://www.scielo.br/pdf/ep/v31n2/a10v31n2.pdf> Acesso em 10 de Agosto de 2017.THIOLLENT, Michel. Metodologia da Pesquisa-ação. São Paulo: Cortez, 2011.TOZONI-REIS, Marília Freitas de Campos et al. A inserção da Educação Ambiental na educação básica: que fontes de informação os professores utilizam para sua formação? Ciênc. Educ., Bauru, 2013, v. 19, n. 2, p. 359-377.VIEIRA, Fátima; RESTIVO, Maria Teresa (orgs.) Novas tecnologias e educação: ensinar a aprender, aprender a ensinar. Biblioteca Digital da Faculdade de Letras da Universidade do Porto. 2014. Disponível em: <http://ler.letras.up.pt/uploads/ficheiros/13021.pdf> Acesso em 25 de Julho de 2017.e3768014
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Ignatenko, Victor, e Oleg Gribunov. "At the Beginning of the Formation and Development of Legal Education at Baikal State University (to the 30th Anniversary of Legal Education at BSU)". Academic Law Journal 24, n. 3 (31 agosto 2023): 269–81. http://dx.doi.org/10.17150/1819-0928.2023.24(3).269-281.
Testo completoAbstract (sommario):
The article is devoted to the history and traditions of legal education in Baikal State University from the time of the Institute of National Economy (1990) to the present day. It makes a disclosure on the contribution to the training of lawyer-founders of legal science development at the University: doctors of legal sciences, professors G.S. Gaverov, V.I. Shikanov, V.A. Semeusov, V.Y. Rybalskaya. The transformation of university law schools under the guidance of leading university law scientists is shown. The contribution of the university to the training of highly qualified specialists of lawyers — candidates and doctors of legal sciences is presented. It reveals priority directions of research work of legal departments, conditioned by the need to improve legislation in a changing economy, development of forms and methods of combating crime. The scale of publishing activity of representatives of law faculties is shown. It characterizes scientific-representative events, where new ideas of legal science were born and the eff orts of not only scientists in various branches of legal science, but also law enforcement officials — representatives of legislative, judicial and law enforcement authorities were consolidated, as well as representatives of business structures. Today, the university still plays an important role in the discussion and solution of the most conceptual, key tasks of scientific and applied nature for Russia and its regions, which allows to take into account the challenges of modern scientific and technical development in the training of future lawyers.
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Glebov, A. V., e I. V. Zyryanov. "Contribution of the Institute of Mining of the Ural branch of RAS to development of modern technologies for the diamond industry". Mining Industry Journal (Gornay Promishlennost), n. 1S/2022 (16 marzo 2022): 26–33. http://dx.doi.org/10.30686/1609-9192-2022-1s-26-33.
Testo completoAbstract (sommario):
The paper presents an analysis of the research work carried out by the Institute of Mining of the Ural Branch of the Russian Academy of Sciences over the past decades by request of AK ALROSA. Their scientific novelty and practical significance are noted. Many works are based on the results of fundamental and applied research, which made it possible to implement them reasonably and with great efficiency at the existing operations. It is acknowledged that the Mining Institute of the Ural Branch of the Russian Academy of Sciences is one of the priority scientific partners of the Yakutniproalmaz Institute. Over the many years of cooperation, a team of researchers from the Mining Institute of UB of RAS has studied the mining, geological and climatic conditions of mining operations in the permafrost zone. Innovative techniques and technologies for mining kimberlite ores in confined conditions of deep open pits as well as methods to assess and select the type of transport and dump truck models have been developed for the open pits and underground mines of AK ALROSA. Recommendations are provided on the safe operation of open-pit transport, including the one with robotic control. Studies have been carried out which were used as the basis to develop technological regulations for projects of reaching and developing reserves of the Udachnaya Tube. A calculation method was proposed and standards were developed for drilling and blasting operations in open pits of diamond mining enterprises of the Russian Federation located in the permafrost zone. The correlation of rock categories aaccording to blastability grade and the specific consumption of explosives, which we recommended, allows to establish rational limits for changing the parameters of drilling and blasting operations within the permafrost zone. Based on field studies, numerical values of the stress-and-strain state of the rock mass were defined during the construction of underground workings. The geomechanical conditions of underground mining of the Udachnaya Tube diamond deposit were justified for the conditions of transition from the open-pit mining operations to the underground ones, considering the stress-and-strain state and geodynamic activity of various sections of the rock massif. Several sections have been developed for the national standard of the Russian Federation “Mining of diamond ore deposits with open-cast method in the permafrost zone”.
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MENABDISHVILI, L. E., N. E. MENABDISHVILI e N. A. GOMELAURI. "Self-preserving Behaviour of Georgian Population During the Period of Covid-19 Pandemic". Demography and social economy, n. 3 (2 novembre 2021): 53–63. http://dx.doi.org/10.15407/dse2021.03.053.
Testo completoAbstract (sommario):
The following papers deals with self-preserving behaviour in the period of a global problem — COVID-19 pandemic. Positive self-preserving behaviour determines the level of health of an individual and, consequently, of a society. In the period of the pandemic we have witnessed an increased interest toward self-preserving behaviour. Apart from observing private hygiene or hygiene norms and social distancing, there were no other protective mechanisms during the process of the research, and vaccination has not yet begun. As a result of the urgency of the issue, the staff s of Institute Demography and Sociology Ilia State University under the guidance of professor A. Sulaberidze have conducted a sociological research in October 2020, “Awareness of the corona virus pandemic’s impact on the social-economic situation of Georgian population and self-preservative behaviour”, in four regions of Georgia. Th e regions were selected based on the level of the coronavirus’s proliferation. Respondents were selected using the method of random sampling. We interviewed 500 respondents with the help of pre-composed questionnaires. Th e following research is one of the attempts in Georgia to study self-preserving behaviour under the circumstances of the pandemic and it shows us to what extent the population’s self-pre-serving behaviour is directed toward defense against the coronavirus. One of the main functions of a state is to prevent the spread of diseases and protect its population from harmful infl uence of environmental factors. In this regard, the state has implemented signifi cant measures; however, they are not suffi cient as the joint eff orts of the state and each citizen determine the robustness of a country’s population as well as the scope of a pandemic’s proliferation. Our goal is to evaluate the eff orts of the citizens, as for our objectives, we aim to ascertain the factors which seem auspicious and adverse for the mentioned eff orts. Th e analysis of the research’s results outlined important diff erences between genders with regard to evaluating one’s own health and selfpreserving behaviour. Th e researchers had also shown that men value their health more highly and take care of it less. Th is tendency is immutable even when self-preserving behaviour signifi cantly determines not only the possibility of one’s own infection, but also of those surrounding us. Women respondents are more prone to observe every recommendation of epidemiologists than men. Th e level of population’s awareness is high with respect to the symptoms of the infection as well as recommendations for self-protection and the existing infection situation in the country. Th e dissimilar levels of infection between various regions gave us varying indicators of awareness. Th e higher the infection rate, the higher the awareness rate. Th e respondents’ health condition signifi cantly determines the population’s attitude toward the coronavirus infection. Self-assessment of one’s health condition has an impact on the level of fear caused by the pandemic. Th e respondents with chronic ailments are more liable to express fear than those who evaluate their health highly. Th e perception of the risks associated with the coronavirus infection is diff erent in terms of sexes. Compared to men, women, on average, perceive the coronavirus threat and its subsequent problems more emotionally and give a lower assessment to their health condition. Th e population’s fear of the pandemic is exacerbated by the fact that this viral infection has not been adequately studied yet and we are not aware of its future repercussions or complications. Therefore, those respondents who are fully healthy also express justifi able apprehension. Th ere emerged a proportionate connection between the level of following the epidemiologists’ re co mmendations and perception of the threat of the COVID infection. The more seriously people perceive the mentioned threat, the more eager they are to fulfi ll the epidemiologists’ recommendations.
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Kapuran, Aleksandar, Mario Gavranovic e Mathias Mehofer. "Bronze age settlement and necropolis of Trnjane, near Bor - revision and new research results". Starinar, n. 70 (2020): 51–84. http://dx.doi.org/10.2298/sta2070051k.
Testo completoAbstract (sommario):
In archaeological literature, the site of Trnjane, near Bor in eastern Serbia is known as an urn necropolis, with 43 discovered urn graves. The excavations in Trnjane took place between 1985 and 1987-1989, and continued in 1998. The investigations also included an excavation of a nearby settlement, but the results of this research were never published. In most of the previous studies, Trnjane was assigned to the Middle and Late Bronze Age, while the necropolis was often connected with the spread of the Urnfield Phenomena from Central Europe toward the Balkans. New investigations started in 2017 as cooperation between the Archaeological Institute in Belgrade and the Institute for Oriental and European Archaeology (OREA) of the Austrian Academy of Sciences shed new light on the chronology and cultural assignment of Trnjane and other similar surrounding sites in the region of eastern Serbia. The excavation of the settlement area in 2017 and 2018 yielded numerous finds indicating metallurgical activities connected with copper ore smelting (slag and ores), while pottery finds showed a typological resemblance with an Early and Middle Bronze Age repertoire. The radiocarbon dates from the settlement area and from urn graves of the neighbouring necropolis also point to a much earlier time than previously assumed. The new chronological determination of Trnjane raises a set of new questions, especially regarding the cultural connections between central Europe and the Balkans and transfers of copper ore smelting technology in the Bronze Age.
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Makeyev, Alexander B., Sergey G. Skublov, Olga L. Galankina, Evgeny A. Vasiliev e Anna O. Krasotkina. "Pseudorutile-leucoxene-quartz ores of Timan ‒ a new genetic type of titanium raw materials: prospects for industrial development". Georesursy 25, n. 3 (30 settembre 2023): 163–74. http://dx.doi.org/10.18599/grs.2023.3.10.
Testo completoAbstract (sommario):
The two largest deposits of Russia – Yaregskoye and Pizhemskoye belong to the same genetic type; hydrothermal-metamorphic indigenous deposits. They are located in the same Timan structure at a distance of no more than 230 km from each other. According to the total approved reserves and forecast resources of titanium dioxide, they are approaching 60% of the all-Russian and will form the basis of industrial titanium raw materials used in Russia in the near future. In the interests of technological mineralogy, morphological features, internal structure, chemical composition of grains of the two main titanium mineral phases ‒ leucoxene and pseudorutile, TiO2 polymorphs, as well as the composition of mineral microinclusions in these phases have been studied in detail. The compositions of all mineral phases in polished preparations of leucoxene and pseudorutile were analyzed by SEM-EDS method at the Institute of Geology and Geochronology of the Precambrian of the RAS, 147 chemical analyses were obtained at the point (3 µk) and many images of polished grains of anatase, leucoxene and pseudorutile were scanned over the area (20×20 µk). In the leucoxene grains themselves, 12 mineral phases were diagnosed and characterized in the form of inclusions: pseudorutile, rutile, anatase, quartz, hydromuscovite-illite, kaolinite, siderite, zircon, xenotime, pyrite, florencite, monazite and kularite. TiO2 polymorphs are verified by Raman spectroscopy and X-ray diffraction analysis. New evidence has been obtained that the transformation of ilmenite into leucoxene occurs hydrothermally through intermediate phases ‒ Fe-rutile and pseudorutile; the enlargement of rutile crystals in the leucoxene grain itself is shown; the presence of secondary crystals of siderite, florencite and others inside the studied grains.
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Degtyareva, A. D., N. B. Vinogradov, S. V. Kuzminykh e M. A. Rassomakhin. "METAL PRODUCTS OF THE ALEKSEYEVKA-SARGARY CULTURE FROM THE MIDDLE AND UPPER TOBOL AREAS". VESTNIK ARHEOLOGII, ANTROPOLOGII I ETNOGRAFII, n. 4(47) (30 dicembre 2019): 28–44. http://dx.doi.org/10.20874/2071-0437-2019-47-4-3.
Testo completoAbstract (sommario):
The article describes morphological and typological characteristics of non-ferrous metal, determines the for-mulae of alloys, as well as identifies techniques used for the production of tools by the Alekseyevka-Sargary cul-ture from the South Trans-Urals (15th/14th and 12th/11th BC). We carried out the morphological and typological study of the non-ferrous metal along with the X-ray fluorescence (Institute of Archaeology RAS, Institute of Mine-ralogy UB RAS; X-MET3000TX analysers from Oxford Instruments Analytical, M1 Mistral from Bruker Nano GmbH) and metallographic (Tyumen Scientific Centre SB RAS; Zeiss Axio Observer D1m microscope) analyses. A total of 19 tools exhibiting morphology inherent to the tool collections of the Alekseyevka-Sargary culture were selected for the study. These tools comprised random finds and items from the settlements of the Chelyabinsk and Kurgan regions of Russia, as well as from the Kostanay Region of Kazakhstan: daggers, а spearhead, sick-les, socketed chisels, a spear end cap and single-blade knives. A group of tools and weapons characteristic of all Eurasian cordoned-ware cultures was distinguished — daggers with handguards and socketed grooved chisels. In addition, weapons characteristic of the sites attributed to the Alekseyevka-Sargary culture (Saryarka, Altai, and Semirechye) were identified within the weapon complex of the South Trans-Urals. These weapons included bush hooks of the Sosnovaya Maza type, knives having marked handles, spearheads with holes and socketed straight-blade chisels. The metal of the South Trans-Urals is distinguished by the marked heterogeneity of its chemical composition with the predominance of low-alloyed bronzes Cu–Sn, Cu–Sn–As and Cu–As (66.7 %). There are 4 pure copper items, as well as products from the complex alloy Cu–Sn–As–Ni–Co and products with elevated iron concentrations (up to 2.68 %). These data indicate that the population experimented in the course of metal-lurgical processing of raw materials; they transitioned to smelting metal from sulphide ores or to the smelting of copper with sulphide or silicate nickel ores of the Ufaley Massif (deposits in the Chelyabinsk Region). South Ural craftsmen produced bronze and copper primarily using technologies for casting tools in one-sided (with flat cov-ers) and two-sided moulds. The casting was followed by refining operations using the cold forming technology with the intervals of low-temperature forging modes. This choice of temperature is justified in the procession of low-alloyed bronze. Clearly, the centre for metal production of the Alekseyevka-Sargary culture in the South Trans-Urals was a metallurgical one, with the development of both oxidised and sulphide deposits in the South Urals. Innovative technologies of smelting copper with chalcopyrite, arsenopyrite, and nickel-containing ores were introduced. The complex of tools attributed to the Alekseyevka-Sargary tribes from the Tobol area is generally identical to the bronze inventory from Saryarka, Altai and Kyrgyzstan. Local craftsmen employed the traditional technologies of processing copper and bronze commonly used in the centres for metal production throughout the area of the Alekseyevka-Sargary culture, working primarily with bronzes low-alloyed by tin. As in previous eras, tin ingots and products were delivered from Central Kazakhstan and Ore Altai, but in much smaller quantities. The small number of products and the data of an analytical study indicate the relocation of the main centres for metal production of the Alekseyevka-Sargary culture from the Urals region (as compared to the big centres of Petrovka and Alakul cultures) to Central and Eastern Kazakhstan, up to Xinjiang in China.
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Serratine, Paula Lopes, e Kledson Lopes Barbosa. "Lip filling associated with subcision in a patient with cleft lip and palate". Research, Society and Development 11, n. 11 (28 agosto 2022): e458111133751. http://dx.doi.org/10.33448/rsd-v11i11.33751.
Testo completoAbstract (sommario):
To describe a case of lip filling associated with subcision of the ligaments of the orbicularis oris muscle and the superficial musculoaponeurotic system (SMAS) of a patient with cleft lip and palate. Case details: A 42-year-old woman was seen at a dental clinic specializing in orofacial harmonization (Instituto Erlacher) with a complaint of lip asymmetry. She reported being born with cleft lip and palate and being submitted to surgical intervention by an oral and maxillofacial surgeon. After clinical evaluation and planning, a subcision technique was performed prior to lip filling with hyaluronic acid, with the objective of maintaining good tissue integration of the product, avoiding its migration to other regions, and reducing local resistance due to scar fibrosis. Final considerations: This study revealed that even though it is not a definitive procedure, which requires periodic maintenance, the minimally invasive treatment with the injection of hyaluronic acid through the subcision technique is capable of immediately correcting the lip asymmetry of patients with cleft lip and palate. looking for the procedure.
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DMITRAK, Yuri. "THE MAIN SCIENTIFIC ACTIVITY TRENDS OF NORTH CAUCASIAN INSTITUTE OF MINING AND METALLURGY (STATE TECHNOLOGICAL UNIVERSITY) IN THE STUDY AND SOLUTION OF THE PROBLEM OF COMPLEX AND ENVIRONMENTALLY SAFE PROCESSING OF NATURAL AND TECHNOGENIC MINERAL RAW MATERIALS". Sustainable Development of Mountain Territories 13, n. 2 (30 giugno 2021): 304–32. http://dx.doi.org/10.21177/1998-4502-2021-13-2-304-332.
Testo completoAbstract (sommario):
The result of many years research of the university scientific community in the field of topical issues of complex processing of natural and man-made mineral raw materials was the creation of a scientific school “Dynamics of working bodies of machines and equipment for fine grinding of rocks” under the leadership of Professor Dmitrak Yu. V. Research results. The dynamic parameters of the grinding bodies are determined directly in the mill grinding chamber which ensure the contactless transmission of information from the grinding ball to the receiving device. A new method of materials self-grinding and the design of a vertical centrifugal mill based on it has been developed. The mill tests during the grinding waste from the production of ceramic products (the battle of insulators, crushed mullite bricks) showed high efficiency and prospects. The tests of a laboratory vibrating mill with one grinding chamber and a rotor diameter of 250 mm for grinding dolomite were carried out. The experiments have shown the possibility of creating vibrating mills for solid materials grinding. In the development of the work of I. N. Plaksin on the flotation of ores with the jet movement of products in the scheme tested by him together with employees in the conditions of the Tekeli processing plant, the modes of joint processing of ores and gold placers were developed at the NCIMM (GTU). It was established that with the unprofitable individual development of alluvial gold mining waste, a positive economic effect can be obtained through their joint processing with ore gold reserves by fine-tuning the concentrate extracted from man-made raw materials by gravitational enrichment methods at a stationary processing plant. It is proved that the addition of the gravitational technology of alluvial gold extraction by flotation methods provides an increase in annual gold production by ~38 % due to the additional extraction of “resistant” forms of gold for gravitational methods. It has been proved in laboratory conditions that the waste slag of the Copper plant of “Ltd. MMP Norilsk Nickel” can be disposed of by joint processing with the ore of current production. It is established that the technology development using metal leaching is promising for the development of Sadonsky plant deposits.
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Awan, Waqar Ahmed, Anam Aftab, Usman Iqbal Janjua, Rehan Ramzan e Nasir Khan. "EFFECTIVENESS OF KINESIO TAPING WITH OROMOTOR EXERCISES IN IMPROVING DROOLING AMONG CHILDREN WITH CEREBRAL PALSY". Rehabilitation Journal 01, n. 02 (31 dicembre 2017): 21–27. http://dx.doi.org/10.52567/trj.v1i02.43.
Testo completoAbstract (sommario):
Objective: To determine the effectiveness of kinesio taping (KT) with oromotor exercises (OME) in improving drooling in children with cerebral palsy. Material and Methods: A randomized control trial (RCT) was conducted at National Institute of Rehabilitation Medicine (NIRM). Forty eight CP children, age ranged 4-8 years, having good head control and fair comprehension for verbal commands with drooling severity ≥ 3 rated on Thomas Stonells drooling scale were included in the study. The n=48 CP children were equally divided into two groups. Group A (n=24) participants were given an hour time which included taping of orbicularis oris muscle followed by oral motor exercises. Group B (n=24) participants were given the same treatment except there was only application of Kinesio taping of orbicularis oris muscle without oral motor exercises. The participants were assessed 5 times; at week 0 (Baseline) and then during intervention at week 4, week 8, week 12 and finally at week 16 after completion of intervention. Data was collected through Thomas Stonells drooling scale and drooling impact scale. Data was analyzed by using SPSS version 21. For presentation of categorical and demographic variables, mean and standard deviation were used. RM-ANOVA was used to analyze changes within the groups and independent samples t-test was used for differences between the groups. Results: The mean age in group A is 3.93±1.7 years and the mean age in group B is 3.66±1.26 years. The result showed significant improvement within both groups (p≤0.05). Between groups comparison revealed more significant decrease in drooling severity and its impact in group A (KT+OME) as compared to group B (KT) at p≤0.05. in case drooling frequency no significant difference was observed. Conclusion: The results of the study indicated that kinesio tapping along with oro-motor exercises were more effective management option for drooling severity and impact on CP children life. Keywords: Cerebral palsy, drooling, kinesio tapping, oro-motor exercises, Thomas Stonells drooling scale, drooling impact scale.
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Kuznetcov, N. N., e L. Yu Kondrashov. "Rockburst hazard potential assessment of rocks of the Khibiny massif deposits according to the Kaiser criterion". Vestnik MGTU 26, n. 2 (30 giugno 2023): 170–79. http://dx.doi.org/10.21443/1560-9278-2023-26-2-170-179.
Testo completoAbstract (sommario):
The mining and geological conditions in the mines worsen due to changes in the stress-strain state of rock masses and their structural disturbance when mining goes to great depths. Under such conditions, it is necessary to assess the impact hazard of ores and rocks that make up the mined deposits. For the prompt implementation of such an assessment, it is proposed to use the Kaiser criterion consisting in the analysis of experimental data obtained on rock samples. The paper presents the results of laboratory testing of rock samples from the deposits of the Khibiny massif under uniaxial compression and tension. The values of their brittleness coefficients have been determined. The possibility of using the Kaiser criterion for a preliminary assessment of rock burst hazard potential has been shown. It has been established that spotty-trachytoid melteigite and trachytoid ijolite-melteigite have a high potential for impact hazard, while spotted apatite-nepheline ore does not have such a potential. A comparison has been made of the obtained results of rockburst hazard assessment of hard rocks from the Khibiny massif deposits according to the Kaiser criterion, as well as the criterion of the Mining Institute of the KSC RAS and the criterion of A. N. Stavrogin. It can be noted that the Kaiser criterion makes it quite easy to carry out a preliminary assessment of rock burst hazard based on the results of testing samples on standard presses. However, to increase the degree of reliability of the data obtained, they must be certified according to the criterion of the Mining Institute of the KSC RAS or the criterion of A. N. Stavrogin.
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Toktar, G., D. R. Magomedov, A. K. Коizhanova, N. N. Abdyldaev e A. N. Bakraeva. "Extraction of gold from low-sulfide gold-bearing ores by beneficiating method using a pressure generator for pulp microaeration". Kompleksnoe Ispolʹzovanie Mineralʹnogo syrʹâ/Complex Use of Mineral Resources/Mineraldik Shikisattardy Keshendi Paidalanu 325, n. 2 (28 novembre 2022): 62–71. http://dx.doi.org/10.31643/2023/6445.19.
Testo completoAbstract (sommario):
Research results on the study of the material composition of low-sulfide gold-bearing ore from the East Kazakhstan deposit are presented. The main non-metallic minerals of the original sample and beneficiation products include quartz, chlorite (clinochlore), carbonates (calcite and dolomite). Pyrite is present predominantly in the form of cubic crystals, sometimes in the form of clusters. The grain size is from 0.03 to 0.40.5 mm, the size of the clusters reaches several mm. Iron oxides (goethite, hydrogoethite) were formed on pyrite, possibly magnetite and ilmenite. The assay test found that the test sample contains 6.04 g/t Au and 7.9 g/t Ag. The content of sulfide minerals is 11.81%. A significant part of gold (85.51%) is in a finely disseminated state in sulfides, as well as in rock-forming minerals 1.22%. The paper presents the results of laboratory studies of the gold- ore beneficiation ability using gravity concentration processes. Gravity enrichment tests were performed on laboratory equipment: Knelson KS-MD 3 centrifugal concentrator, SKO-05 concentration table, and a two-chamber diaphragm jig (OML TsNIGRI type (jig of Central Geological Research Institute for Nonferrous and Precious Metals)). The obtained results of ore beneficiation on the concentration table show the possibility of obtaining a gravity concentrate with a gold grade of 48.9 g/t with a gold recovery of 40.08%. When separating the gravity concentrate on a jig, the gold extraction was 31.6% at a content of 51.4 g/t. It was found that that according to a single-stage beneficiation scheme in a centrifugal concentrator, a gold-bearing concentrate with a gold content of 58.3 g/t was obtained with a recovery of 80.6%. The dependence of the gold extraction and its content in the gravity concentrate on the output at the Knelson centrifugal concentrator is shown. The results of ore flotation beneficiation show the possibility of obtaining waste grade flotation tailings with a gold grade of 0.8 g/t. The extraction of gold into the combined concentrate, with a gold content of 49.7 g/t, is 88.88%.
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Kenzhaliyev, B. К., S. A. Kvyatkovskiy, S. A. Trebukhov, R. A. Abdulvaliyev, A. K. Koizhanova, N. K. Tussupbayev, S. V. Gladyshev e Gulzhaina K. Kassymova. "Development and Implementation of Innovative Technologies That Ensure an Increase in The Extraction of Non-ferrous, Noble, Rare, Rare-Earth Metals". Teknomekanik 5, n. 1 (30 gennaio 2022): 1–12. http://dx.doi.org/10.24036/teknomekanik.v5i1.11972.
Testo completoAbstract (sommario):
The article presents the most innovative technologies developed by Satbayev University, "Institute of Metallurgy and Ore Beneficiation" JSC (Republic of Kazakhstan, Almaty) in recent years. The implementation of these works on an industrial scale will lead to significant economic and environmental effects. The following technologies are described: synthesis of a new foaming agent for intensification of flotation enrichment of gold-bearing ores; multicomponent microflotation, which allows to increase the extraction of valuable metals at existing deposits and to develop new, relatively poor and previously economically unpromising deposits; flotation enrichment of persistent gold-containing ore; contractile pyrometallurgical selection, which allows direct melting of persistent gold-containing raw materials with the transfer to the gas phase of arsenic, sulfur and other volatile components, followed by their neutralization and concentration of gold, silver and other non-ferrous metals in matte melt; continuous conversion of copper matte in the Vanyukov furnace; processing of liquid metallurgical slags in a furnace with an electrically heated coke filter; vacuum distillation refining of rough selenium; extraction of rare earth metals from extraction phosphoric acid obtained during the processing of phosphorites; processing of high-grade low-quality bauxite.
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Baghela, Abhishek, M. Thungapathra, M. R. Shivaprakash e Arunaloke Chakrabarti. "Multilocus microsatellite typing for Rhizopus oryzae". Journal of Medical Microbiology 59, n. 12 (1 dicembre 2010): 1449–55. http://dx.doi.org/10.1099/jmm.0.023002-0.
Testo completoAbstract (sommario):
Rhizopus oryzae is the most frequent causative agent of zygomycosis. Although zygomycosis causes considerable morbidity and mortality in immunocompromised patients, the epidemiology of the disease is not well studied and no standard molecular typing method has been described for any of the causative agents. Here we describe a multilocus microsatellite typing (MLMT) method for R. oryzae. R. oryzae genome sequences were downloaded from the Fungal Genome Initiative database (Broad Institute). The intergenic regions and ORFs of approximately 5.7 Mb were screened for repeat regions with the help of the online repeat search tool Repeat Masker. Of the 30 microsatellite loci identified, 3 microsatellites [RO3, (CCT) n ; RO4, (TA) n ; and RO8, (GAA)(GGA) n ] were selected after validation of the ability to amplify them and their size variation in 8 randomly selected clinical isolates of R. oryzae. Nucleotide sequence analysis of these loci demonstrated polymorphism in the microsatellite repeat number. The capabilities of these microsatellite loci were assessed for strain differentiation on 30 clinical isolates, based on fragment size determination in an automated capillary electrophoresis using fluorescent labelled primers. These three polymorphic microsatellite loci were found to have good discriminatory power (D) (RO3, D=0.846; RO4, D=0.747; RO8, D=0.742; with a combined D=0.986) and stability for seven subcultures. It was also confirmed that the MLMT method may be applied to both R. oryzae and Rhizopus delemar (a proposed new species), although MLMT analysis could not differentiate them into two clusters. The MLMT system, described here for what is believed to be the first time for a zygomycotic fungus, holds promise as a powerful tool for the strain typing of R. oryzae.