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Letteratura scientifica selezionata sul tema "Chromium research"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 20 febbraio 2023

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Articoli di riviste sul tema "Chromium research"

Martynenko, V. V., P. O. Kushchenko, I. G. Shulyk, Yu Ye Mishnyova, K. I. Kushchenko e Yu O. Krakhmal. "Properties dependence of chromia and alumina-chromia-zirconia-silica refractories with a mass fraction of 30 % Cr2O3 on the type of chromium oxide". Scientific research on refractories and technical ceramics 121 (30 dicembre 2021): 23–35. http://dx.doi.org/10.35857/2663-3566.121.03.

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In JSC “URIR named after A. S. Berezhnoy” chromia refractories for the lining of pool and feeder of glass-making furnaces for the production of glass fiber from E glass, which are in contact with the glass melt, and alumina-chromia-zirconia-silica refractories with 30 % Cr2O3 for service in the topsides of these furnaces, in areas affected by components of the glass batch and glass melt, have been developed and manufactured. The main raw material for the chromia products manufacturing is metallurgical chromium oxide. In the manufacture of alumina-chromia-zirconia-silica products, metallurgical chromium oxide or a mixture of metallurgical and pigment chromium oxide in a ratio of 2 : 1 is used as the chromium oxide component of the batch. The testing of new materials, such as a new grade of chromium oxide, in the technologies of chromia and alumina-chromia-zirconia-silica refractories is relevant. The effect of a new grade of chromium oxide on the properties of chromia refractories has been investigated. It was found that samples of a new grade of chromium oxide, pressed at optimal values of moisture content of the mass and specific pressing pressure, are characterized by a low apparent density of the raw material in comparison with samples made of metallurgical chromium oxide. After firing, samples from chromium oxide of the new grade are not inferior to those of metallurgical chromium oxide in terms of properties, but they have large changes in linear dimensions during firing, which can lead to the formation of cracks, therefore, the issue of obtaining chromia products from mixtures with the replacement of metallurgical chromium oxide with chromium oxide of the new grade in order to increase the apparent density of products requires additional research. A study on the effect of new grade of chromium oxide on the properties of alumina-chromia-zirconia-silica refractories with a content of 30 % Cr2O3 has been carried out. It was established that, in the batch for the manufacture of these refractories, containing metallurgical and pigment chromium oxide, it is possible to completely replace the pigment chromium oxide with chromium oxide of the new grade or to increase the content in the batch of chromium oxide of the new grade instead of a part of metallurgical chromium oxide to the ratio of metallurgical chromium oxide and chromium oxide of the new grade 1 : 2.

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SHIRYAEV, Pavel Borisovich, e Nadezhda Vladimirovna VAKHRUSHEVA. "Genesis of podiform chromitites – a review of models". NEWS of the Ural State Mining University 1, n. 2 (15 giugno 2020): 20–29. http://dx.doi.org/10.21440/2307-2091-2020-2-20-29.

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Relevance of the work. Research aimed at identification of genesis of chromium ores in alpine-type hyperbasites has been conducted by scientists (geologists, petrologists and geochemists) around the world for more than a century. Nevertheless, the issue of their origin remains debatable to this day. The purpose of the work is to highlight the main stages of the development of scientific ideas about the genesis of chromian mineralization in alpinotype hyperbasites; to present and summarize the main, most significant and innovative scientific ideas of Russian and foreign experts who have been involved in this issue. Results. The evolution of scientific views on the genesis of chromic mineralization from the second half of the 19th century is traced. In Russia and abroad, its main stages are highlighted. Throughout this period, some ideas dominated that link the formation of concentrations of ore-forming chrome-spinels with its crystallization from magmatic melt. Major discoveries in earth sciences – the emergence of plate tectonics, the discovery of UHP minerals in chromite-bearing ultrabasites, – intensified the scientific search and led to the emergence of alternative models that consider chromitites as products of metasomatism or metamorphism. Particular attention is paid to the results of research by Russian experts, whose scientific contribution to the development of ideas about the genesis of chromium ores is very large and at the same time, from our point of view, underestimated. This work is intended for geologists, petrologists, and experts in the geology of ore deposits dealing with ultramafic, chromic ores, and ophiolite complexes in general.

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Eric, R. H. "Chromous capacities of ferrochromium and matte smelting slags". Archives of Materials Science and Engineering 2, n. 93 (1 ottobre 2018): 49–58. http://dx.doi.org/10.5604/01.3001.0012.7354.

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Purpose: of this paper is to extend the slag capacity concept to sparingly soluble cationic species encountered for example in matte smelting and ferrochromium processing in terms of chromous capacities. Design/methodology/approach: In this context in order to develop the chromous capacity the experimental data on slag-metal equilibrium for ferrochromium smelting and on chromium distribution between slag and matte phases encountered in sulphide smelting of PGM (Platinum Group Metals) and chromium containing copper nickel concentrates were used. Findings: The calculated chromous capacities were in the 10-8 range for ferrochrome smelting slags and 10-4 range for matte smelting slags. These values indicate the very low and moderate chromous ion dissolving ability of ferrochromium smelting slags and matte smelting slags respectively. Research limitations/implications: Due to highly reducing conditions in ferrochromium smelting and the imposed low oxygen partial pressures in sulphide smelting of chromium and PGM containing concentrates chromium in the slag was assumed to be in its divalent state. The slag-metal/matte reaction for dissolution of chromium into the slag as a cation under reducing conditions -in contrast to reactions for dissolution of species such as sulphur and phosphorus into the slag as anions under oxidizing conditions – required the release of electrons. Thus to maintain charge neutrality the dissolution of chromium from the metal or the matte phases into the slag as Cr2+ ions was accompanied by consumption of these electrons by reduction of Fe2+ ions in the slag into metallic Fe which dissolved in the metal/ matte phase. This was supported by the experimental equilibrium data. Hence the slagmetal/ matte reaction defining the chromous capacity involved both O2- and Fe2+ ions of the slag phase. Moreover for matte smelting the thermodynamic activities of species in the matte phase were assumed to conform to ideal associated solution model due to lack of data. For future work it is advisable to determine such activities. Practical implications: The calculated chromous capacities were in the 10-8 range for ferrochrome smelting slags and 10-4 range for matte smelting slags. The results clearly indicate that in matte smelting lower basicity slags would be preferable to render chromium more soluble in the slag in contrast to ferrochromium smelting where higher basicity slags would be suitable to minimize chromium losses to the slag. Originality/value: This research and hence the paper is probably the first on dissolution of chromium as chromous ion in slags, thus it is novel and original.

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Liu, Hao Rui, e Chang Xin Nai. "Research on Environmental Materials with Complex Resistivity Dispersion Properties of Chrome-Contaminated Soil". Applied Mechanics and Materials 540 (aprile 2014): 263–66. http://dx.doi.org/10.4028/www.scientific.net/amm.540.263.

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The complex resistivity dispersion experiment of the soil with different water content and different chromic salt content is the base of the complex resistivity detection method which will be used for evaluating the field polluted by chromium residue. By the soil complex resistivity dispersion properties experiment in kinds of conditions, we find that complex resistivity amplitude, phase, in-phase resistivity and out-phase resistivity can be influenced by the water content and contamination content; but the complex phase and out-phase resistivity have the obvious dispersion properties. The experiment result shows that the complex resistivity detection technology based on soil dispersion properties can be used to evaluate the field polluted by chromium residue.

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Chen, Yong, e Xiao Li Wen. "Chromium-Containing Solid Waste Soluble Six Chromium Leaching Influence Factor Research". Advanced Materials Research 482-484 (febbraio 2012): 2496–99. http://dx.doi.org/10.4028/www.scientific.net/amr.482-484.2496.

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Through the research of determining chromium-containing solid waste in different leaching conditions of Cr6+ leaching concentration, get Cr6+ leaching conditions, for the follow-up of the harmless treatment to provide reliable technical parameters.

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Shi, Yu Min, Tong Wang, Cheng Hu, Lin Bai e Zhi Tong Sui. "Research on Detoxifying Treatment to Chromium Slag". Advanced Materials Research 402 (novembre 2011): 61–65. http://dx.doi.org/10.4028/www.scientific.net/amr.402.61.

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A particular industrial waste was selected as reducer for detoxified chromium slag in solid phase. Oxidation resisting was also tested. The results showed that concentration of Cr(Ⅵ)in the products was related to experimental condition, such as the proportion of chromium slag, the granularity of reactants, the reaction temperature and time . The leached Cr(Ⅵ)in the products was remained below 0.5 ppm of GB8978-1996 limits.

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Veillon, Claude, e Kristine Y. Patterson. "Analytical issues in nutritional chromium research". Journal of Trace Elements in Experimental Medicine 12, n. 2 (1999): 99–109. http://dx.doi.org/10.1002/(sici)1520-670x(1999)12:2<99::aid-jtra7>3.0.co;2-m.

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Chen, Da Qing, Hai Bin Wang, Ji Chuan Huo, Yong Lin Lei e Wei Ai. "The Research of the Orgince Silicone Emulsion Hybridized Chromium-Aluminum Phosphate Composites". Advanced Materials Research 699 (maggio 2013): 519–23. http://dx.doi.org/10.4028/www.scientific.net/amr.699.519.

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In the paper ,the preparation of the orgincesilicone emulsion hybridized chromium-aluminum phosphateand thecomposites was studied.The aluminum-chromium-phosphate washybridizedbyadding the orgincesilicone emulsio-n, the tensile lap-shear strength of the hybridized aluminum-chromium-phosphateincreasedfrom1.2MPato4.0MPaor more, its dielectricconstantwasreducedfromabout 4.0toabout3.6; the flexural strength of the composites was increased from80Mpa tomore than120Mpa and the the moisture rate of the composites reduced to about 1.6%

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Li, Xue Lei, Xiao Hang Liu, Hao Bin Tian e Wen Jing Yuan. "Experimental Research on Hard and Crack-Free Electrodeposited Chromium Coatings". Advanced Materials Research 1044-1045 (ottobre 2014): 47–52. http://dx.doi.org/10.4028/www.scientific.net/amr.1044-1045.47.

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In order to eliminate cracks in the chromium coating, a novel method named flexible extrusion assisted chromium electroplating was proposed. The bright and crack-free chromium coatings were electrodeposited by using the perturbation and extrusion of hard and insulating particles. The prepared deposits were characterized by scanning electron microscope (SEM) and three-dimensional topography. The testing results showed that the surface was very smooth and there was no micro cracks in the coating. Micro hardness of the electrodeposited layer was also tested. It was confirmed that the chromium coating electrodeposited with rotating cathode in hard particles had high micro hardness as to 850HV and the micro hardness could be controlled by the process parameters. The rule of the micro hardness was concluded by analyzing current density and rotating speed. In addition the results of salt spray test and electrochemical polarization curve showed that the coating deposited by new method had higher corrosion resistance than that by traditional method.

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Xu, Liu Jie, Guo Shang Zhang, Ji Wen Li, Zhan Wu Dong e Shi Zhong Wei. "Research on Microstructure and Mechanical Properties of High Boron Cast Steel". Advanced Materials Research 189-193 (febbraio 2011): 3968–71. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.3968.

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In recent years, high chromium cast irons have been widely applied in many fields because they have high hardness and abrasion resistance. However, high chromium cast irons are also expensive because much alloying elements, such as chromium, molybdenum and nickel, are added into them. In order to resolve above question, a new abrasion-resistant steel with high boron content was developed in this paper. The new high boron steel, with 0.6%~0.8%B and 0.65% C, was prepared using sand casting method. The microstructure and mechanical properties were researched. The results show that the solidification microstructure of as-cast high boron steel consists of boride (FeB) and matrix composed of pearlite, ferrite, and bainite. And the borides distributes along grain boundary in the form of network. After quenching at 980°C and tempering at 250°C, the FeB transforms to Fe2B, and the matrix transforms lath martensite. The hardness of as-cast high boron steel is 43HRC, and its impact toughness is 5J/cm2. After heat treatment, they increase to 56 HRC and 7J/cm2, respectively, approximating that of high chromium cast irons. The new high boron cast steel have a potential in stead of high chromium cast irons

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Tesi sul tema "Chromium research"

Shaddick, Lindsay Raymond, University of Western Sydney, of Science Technology and Environment College e of Science Food and Horticulture School. "The geochemistry of chromium in the supergene environment : chromium (VI) and related species". THESIS_CSTE_SFH_Shaddick_ L .xml, 2003. http://handle.uws.edu.au:8081/1959.7/474.

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A description of the role of chromium in aqueous solution with respect to its geochemistry and the formation of secondary chromium minerals in the supergene environment is developed. Secondary chromium minerals are relatively rare in Nature and apart from the lead chromate crocoite which is by far the most common and also the most keenly sought after by collectors due its great beauty, little is known of related species. In attempt to redress this situation the initial aim of this study is to present an up-to-date list and description of secondary chromium minerals. It has long been recognised that secondary chromium mineralisation, in the form of chromates and compound chromates, occurs as a minor component of total secondary mineralisation in oxidised zones of some sulphide ore bodies. A thermochemical approach is adopted and a model to describe the geochemistry of chromium in aqueous solution as applied to mineral formation in the supergene environment and its transport in near surface waters is established. The model confirms that species distribution of chromium in aqueous solution is quite pH dependent and that at concentrations appropriate to those experienced in Nature, chromate is the only important species in basic solutions under highly oxidising conditions
Master of Science (Hons.)

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Shaddick, Lindsay Raymond. "The geochemistry of chromium in the supergene environment : chromium (VI) and related species". Thesis, View thesis, 2003. http://handle.uws.edu.au:8081/1959.7/474.

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Panaščikaitė, Erika. "Determination of manganese and chromium by electroanalytical stripping methods research". Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20120710_120425-12220.

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There was proposed method for the determination of manganese in drinking water by inverse voltammetry using a mercury film electrode. The determination of manganese in drinking water does not need chemical treatment of a sample. Optimal detection conditions: accumulation potential of -1.75 V, accumulation time 5-30 s, anodic dissolution is performed using square wave voltammetry. Manganese accumulation by the detection limit of 30 seconds is about 0.4 mg l-1, and the relative standard deviations of the working range of concentrations do not exceed 0.10. Actual calcium, magnesium and iron ion concentration in samples of drinking water does not influence the manganese determination. Method comparison with a standard photometric method showed that they are equivalent, but the electrochemical method can be applied in very small concentrations of the manganese, in addition, it does not influence the iron ions in the drinking water. Determination of chromium in cement can be performed by catalytic adsorption voltammetry method using a hanging mercury drop electrode. The medium composition for Cr (VI) determination: 0.15 mol L-1 CH3COONa, 5 mmol l-1 diethylenetriaminepentaacetic acid (DTPA), 0.7 mol l-1 NaNO3, pH = 6. Optimal voltammetry conditions: accumulation potential of -0.9 V, accumulation time 5-10 s, square wave voltammetry mode. Cr (VI) detection limit is about 0.05 mg l-1, the relative standard deviation does not exceed 3%. Chromium was extracted from the cement samples... [to full text]
Pasiūlytas mangano nustatymo metodas geriamajame vandenyje inversinės voltamperometrijos metodu naudojant gyvsidabrio plėvelinį elektrodą. Manganui nustatyti vandens mėginio nereikia chemiškai apdoroti. Optimalios nustatymo sąlygos: kaupimo potencialas –1,75 V, kaupimo trukmė 5–30 s, anodinis tirpinimas atliekamas naudojant kvadratinės bangos voltamperometriją. Mangano aptikimo riba kaupiant jį 30 s yra apie 0,4 μg l–1, o santykiniai standartiniai nuokrypiai darbiniame koncentracijų intervale ne didesni kaip 0,10. Realios kalcio, magnio ir geležies jonų koncentracijos geriamojo vandens mėginiuose netrukdo nustatyti manganą. Metodo palyginimas su standartiniu fotometriniu metodu parodė, kad jie yra ekvivalentiški, tačiau elektrocheminis metodas gali būti taikomas labai mažoms mangano koncentracijoms nustatyti, be to, jam netrukdo geriamajame vandenyje esantys geležies jonai. Chromo nustatymui cemente gali būti naudojamas katalitinės adsorbcinės voltamperometrijos metodas naudojant kabančio gyvsidabrio lašo elektrodą. Terpės sudėtis Cr(VI) nustatyti: 0,15 mol l-1 CH3COONa, 5 mmol l-1 dietilentriaminpentaacto rūgšties (DTPA), 0.7 mol l-1 NaNO3, pH = 6. Optimalios votamperometrijos sąlygos: kaupimo potencialas –0.9 V, kaupimo trukmė 5-10 s, kvadratinės bangos voltamperometrijos režimas. Cr(VI) aptikimo riba yra apie 0,05 µg l 1, santykinis standartinis nuokrypis neviršija 3%. Iš cemento mėginių chromas išekstrahuojamas vandeniu arba azoto rūgštimi. Bendras chromo kiekis... [toliau žr. visą tekstą]

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Ganguly, Rituparna. "THROMBOSPONDIN-1 AS A TARGET OF MICRONUTRIENT TRIVALENT CHROMIUM IN DIABETIC VASCULAR COMPLICATION". Kent State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=kent1461323798.

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Lipps, Jody Patricia. "RESEARCH INTERNSHIP AT BATTELLE MEMORIAL INSTITUTE DEPARTMENT OF ENVIRONMENTAL RESTORATION". Miami University / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=miami1070400640.

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Marin, Cordoba Roberto. "Chromium Carcinogenesis: Characterization of DNA damaging Intermediates by EPR ³¹P NMR, HPLC, ESI-MS and Magnetic Susceptibility". Ohio University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1261417590.

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JACOB, YVAN PIERRE. "A pre-normative research on the isothermal and cyclic oxidation high temperature oxidation behaviour of chromium". Clermont-Ferrand 2, 2001. http://www.theses.fr/2001CLF22279.

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De nombreux parametres experimentaux intervenant lors de l'oxydation du chrome a haute temperature ont ete etudies afin de comprendre leurs effets sur la croissance et l'integrite de la couche de chromine qui se forme lors de cette oxydation. Hormis les techniques classiques utilisees pour l'etude de l'oxydation a haute temperature, nous nous sommes servis de la methode d'activation nucleaires des couches minces (tla) permettant de quantifier les pertes eventuelles d'oxyde par ecaillage lors d'oxydations isothermes ou cycliques. Le but de ce travail, par l'etude systematique de differents parametres, est de servir de reference et de permettre une comparaison et une traduction correcte des resultats provenant de differentes etudes. Nous avons montre que l'oxydation isotherme du chrome suit un regime parabolique avec une fracturation periodique de la chromine due a une nitruration du metal (diffusion d'azote dans le metal). En cyclage, a 1000\c, nous avons detecte un decollement de l'oxyde principalement dans les angles des echantillons. Nous avons egalement mis en evidence le role benefique du si et negatif du c (present sous forme d'impuretes) sur l'oxydation. En atmosphere humide, l'oxygene de la vapeur d'eau participe a la formation de la chromine. Enfin, nous avons observe que la diffusion aux joints de grains de l'oxyde augmente en presence d'azote et/ou de vapeur d'eau. Plus la frequence de cyclage est faible et plus nous avons un ecaillage important de l'oxyde du a une accumulation des contraintes de croissance. Les echantillons de petites dimensions montrent des decollements proportionnellement plus important lors d'oxydations cycliques a 1000\c. Nous avons egalement montre que la preparation de la surface n'a pas d'effet sur le mecanisme et la vitesse d'oxydation. Enfin l'yttrium implante a un effet benefique uniquement a 800 et 900\c en limitant la prise de masse, la diffusion d'azote et la fracturation de la couche.

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Dai, Lu. "EFFECTS OF CHROMIUM ON MOUSE SPLENIC T LYMPHOCYTES AND EFFECTS OF ETHANOL EXPOSURE DURING EARLY NEURODEVELOPMENT ON BEHAVIORS IN MICE". UKnowledge, 2017. https://uknowledge.uky.edu/toxicology_etds/18.

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The dissertation consists of three major projects with the focus on the immunotoxicity of chromium and the behavior disorders caused by early ETOH exposure respectively. Hexavalent chromium [Cr(VI)] is widely used in various industrial processes and has been recognized as a carcinogen. As the first line of host defense system, the immune system can be a primary target of Cr(VI). T cell population represents a major arm of the immune system that plays a critical role in host anti-tumor immunity. Dysfunction of T cells compromises host anti-tumor immunity resulting in oncogenesis. Using mouse splenic T cells as an in vitro model system, the present study assessed the effects of Cr(VI) on T cell functions, as the first step of our investigation of the mechanism underlying Cr(VI)-inhibited immunosurveillance and carcinogenesis. Our results showed that Cr(VI) decreased the viability of CD4+ and CD8+ T cells, inhibited T cell activation, functions, including cytokine release, and degranulation. Fetal ethanol (ETOH) exposure can damage the developing central nervous system and lead to cognitive and behavioral deficits, known as fetal alcohol spectrum disorders (FASD). The use of animal models, especially mouse models is essential for investigating the neurogenetic mechanism of fetal ETOH effects and screening pharmacotherapies against it, due to the extensive knowledge of mouse genetics. However, the availability of mouse model is limited. Via adopting various dosage, timing and administration routes of ETOH exposure, we developed two mouse models to assess behavioral or cognitive changes caused by fetal ETOH exposure in pre-weaning and adolescent period. Our results show that high dosage of ETOH exposure (4 g/kg) during PD 4-10 resulted in hyperactivity, disinhibition, and deficits in learning and memory in mouse offspring, which lays the groundwork for the future FASD research.

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Rink, Cameron L. "Nutritional Intervention And Modeling Of Acute Ischemic Stroke". The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1210957018.

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Midander, Klara. "Metal Particles – Hazard or Risk? Elaboration and Implementation of a Research Strategy from a Surface and Corrosion Perspective". Doctoral thesis, Stockholm : Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11695.

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Libri sul tema "Chromium research"

Parker, James N., e Philip M. Parker. Chromium: A medical dictionary, bibliography, and annotated research guide to Internet references. San Diego, CA: ICON Health Publications, 2003.

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Parker, James N., e Philip M. Parker. Chromium picolinate: A medical dictionary, bibliography, and annotated research guide to internet references. San Diego, CA: ICON Health Publications, 2003.

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Agency, International Atomic Energy, a cura di. Speciation analysis of arsenic, chromium and selenium in aquatic media: Proceedings of a final research coordination meeting held in Vienna, 26-29 April 2004. Vienna: International Atomic Energy Agency, 2007.

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United States. Bureau of Mines. Chromium-Chromite: Bureau of Mines Assessment and Research : Proceedings of Bureau of Mines Briefing Held at Oregon State University, Corvallis, or, June 4-5, 1985. S.l: s.n, 1985.

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Grau, Roy H. Selected mineral deposits and their role as research locations for innovative mining techniques. [Washington, D.C.?]: U.S. Dept. of the Interior, Bureau of Mines, 1996.

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Grau, Roy H. Selected mineral deposits and their role as research locations for innovative mining techniques. [Washington, D.C.?]: U.S. Dept. of the Interior, Bureau of Mines, 1996.

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B, Daellenbach C., a cura di. Chromium-chromite: Bureau of Mines assessment and research : proceedings of Bureau of Mines briefing held at Oregon State University, Corvallis, OR, June 4-5, 1985. [Avondale, Md.]: U.S. Dept. of the Interior, Bureau of Mines, 1986.

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M, Witmer Charlotte, National Institute of Environmental Health Sciences. e Environmental and Occupational Health Sciences Institute., a cura di. The chromium problem: Research needs and risk assessment. Research Triangle Park, N.C: National Institute of Environmental Health Sciences, 1991.

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Sichler. Chromium in Health, Disease & Industry: Index of New Information & Research Bible. Abbe Pub Assn of Washington Dc, 1994.

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Sichler. Chromium in Health, Disease & Industry: Index of New Information & Research Bible. Abbe Pub Assn of Washington Dc, 1994.

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Capitoli di libri sul tema "Chromium research"

Matsumoto, Norio, Shinichi Hirano e Naoya Ohmura. "Enrichment of Chromium-Reducing Bacteria Using Potential-Controlled Electrochemical Cultivation". In Advanced Materials Research, 505–8. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-452-9.505.

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Hasuda, Y., T. Kato, R. Meguriya, Y. Suzuki, S. Kinebuchi, T. Furusawa e T. Ohashi. "Precision Grinding of High Chromium Steels Using Metal Bonded CBN Wheel". In Advanced Materials Research, 171–76. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-461-8.171.

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Halliday, F. M., David E. J. Armstrong, John D. Murphy e Steve G. Roberts. "Nanoindentation and Micromechanical Testing of Iron-Chromium Alloys Implanted with Iron Ions". In Advanced Materials Research, 304–7. Stafa: Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/3-908454-01-8.304.

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Nguyen, Viet Hue, Thi Nam Hoang, Sik Chol Kwon, Man Kim e Joo Yul Lee. "Study on the Properties of Chromium Matrix Composite Plated with Nanosized Diamond Powders". In Advanced Materials Research, 1361–64. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-463-4.1361.

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Huang, Wei Ling, Fu Tian Liu, Wen Hu Li, Chuan Zhen Huang, Zhao Qian Li e Zi Run Yang. "Research on Properties of Ternary Boride Hard Alloy Materials Added Nickel and Chromium". In Materials Science Forum, 408–11. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-421-9.408.

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Nguyen Vinh, Phoi, Ngon Dang Thien e Cuong Le Chi. "Evaluating the Effect of HVOF Sprayed WC-10Co-4Cr and Hard Chromium Electroplated Coatings on Fatigue Strength of Axle-Shaped Machine Parts". In Advances in Engineering Research and Application, 309–17. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-04792-4_41.

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Forouzanmehr, Mohsen, Kazem Reza Kashyzadeh, Amirhossein Borjali, Mosayeb Jafarnode e Mahmoud Chizari. "Effects of CrN/TiN Coatings on Interfacial Contact Resistance of Stainless Steel 410 Bipolar Plates in Fuel Cells". In Springer Proceedings in Energy, 133–39. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63916-7_17.

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AbstractChallenge on energy resources exists, especially when the fossil resources are limited. Fuel cells, as an alternative replacement, can be used. Fuel cells with coated bipolar plates are the interest of this paper. Current research is concerned with the effects of CrN/TiN coatings on interfacial contact resistance (ICR). Stainless steel 410 was selected as a base metal, and the coating process was performed using chromium nitride and titanium nitride by cathodic arc evaporation method. It was found that the surface roughness and ICR values of CrN-coated sample are lower than the TiN-coated sample. The concluded that the CrN layer could be replaced with the TiN layer for better performance of bipolar plates.

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Kharlamov, Yuriy, Volodymyr Sokolov, Oleg Krol e Oleksiy Romanchenko. "Research of the Influence of Conditions of D-gun Spraying on Properties of Tungsten and Chromium Carbides Coatings". In Lecture Notes in Mechanical Engineering, 300–310. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-68014-5_30.

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Vermeersch, Lieselotte, Abbas Jariani, Jana Helsen, Benjamin M. Heineike e Kevin J. Verstrepen. "Single-Cell RNA Sequencing in Yeast Using the 10× Genomics Chromium Device". In Methods in Molecular Biology, 3–20. New York, NY: Springer US, 2022. http://dx.doi.org/10.1007/978-1-0716-2257-5_1.

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AbstractSingle-cell RNA sequencing (scRNA-seq) is emerging as an essential technique for studying the physiology of individual cells in populations. Although well-established and optimized for mammalian cells, research of microorganisms has been faced with major technical challenges for using scRNA-seq, because of their rigid cell wall, smaller cell size and overall lower total RNA content per cell. Here, we describe an easy-to-implement adaptation of the protocol for the yeast Saccharomyces cerevisiae using the 10× Genomics platform, originally optimized for mammalian cells. Introducing Zymolyase, a cell wall–digesting enzyme, to one of the initial steps of single-cell droplet formation allows efficient in-droplet lysis of yeast cells, without affecting the droplet emulsion and further sample processing. In addition, we also describe the downstream data analysis, which combines established scRNA-seq analysis protocols with specific adaptations for yeast, and R-scripts for further secondary analysis of the data.

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Rahgoshay, M., H. Shafaii Moghadam e V. Forouzesh. "Nodular chromite deposits in some Tethyan opthiolites". In Mineral Deposit Research: Meeting the Global Challenge, 457–60. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/3-540-27946-6_119.

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Atti di convegni sul tema "Chromium research"

Shand, Michael L. "Chromium laser research at AlliedSignal". In OE/LASE '94, a cura di Richard Scheps. SPIE, 1994. http://dx.doi.org/10.1117/12.172724.

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Kumar, T. V. Vineeth, J. Ekanthappa, K. T. Kashyap e Aditya Mohan Naik. "Studies on precipitation hardening in copper chromium alloy with 1 wt% chromium". In PROCEEDINGS OF INTERNATIONAL CONFERENCE ON ADVANCES IN MATERIALS RESEARCH (ICAMR - 2019). AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0026200.

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Tao, Yiyuan. "Progress in chromium research and related diseases". In MATERIALS SCIENCE, ENERGY TECHNOLOGY AND POWER ENGINEERING III (MEP 2019). AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5125399.

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Chandrasekhar, T., N. Sasidhar, B. Chethan e Y. T. Ravikiran. "Effect of chromium oxide in improving humidity sensing properties of polypyrrole/chromium oxide composite". In PROCEEDINGS OF INTERNATIONAL CONFERENCE ON ADVANCES IN MATERIALS RESEARCH (ICAMR - 2019). AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0022613.

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Asher, S. E., J. P. Kalejs e B. Bathey. "SIMS analysis of chromium gettering in crystalline silicon". In Photovoltaic advanced research and development project. AIP, 1992. http://dx.doi.org/10.1063/1.42898.

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AVERINA, Julia, Galina KALYAKINA, Elena SUBCHEVA, Ekaterina ABAEVA e Andrey KURBATOV. "OBTAINING AND RESEARCH OF ELECTRODEPOSITED CHROMIUM NANODIAMOND COATINGS". In METAL 2021. TANGER Ltd., 2021. http://dx.doi.org/10.37904/metal.2021.4175.

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Roy, Aniruddha, e Ayan Das. "Danger of Hexavalent Chromium and Strategy for the Remeditation". In National Conference on Advancement of Computing in Engineering Research. Academy & Industry Research Collaboration Center (AIRCC), 2013. http://dx.doi.org/10.5121/csit.2013.3245.

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Ahmad, N., W. A. Ahmad e Z. Zakaria. "Biosorption of chromium (VI) by chitosan-immobilized Acinetobacter haemolyticus". In 2012 IEEE Symposium on Humanities, Science and Engineering Research (SHUSER). IEEE, 2012. http://dx.doi.org/10.1109/shuser.2012.6268864.

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Xiaosan Song e Qian Wang. "Research on nano-metal clustersmedia removing hexavalent chromium in rainwater". In 2012 International Symposium on Geomatics for Integrated Water Resources Management (GIWRM). IEEE, 2012. http://dx.doi.org/10.1109/giwrm.2012.6349630.

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Guilemany, J. M., e J. A. Calero. "Structural Characterization of Chromium Carbide-Nickel Chromium Coatings Obtained by HVOF-Spraying". In ITSC 1997, a cura di C. C. Berndt. ASM International, 1997. http://dx.doi.org/10.31399/asm.cp.itsc1997p0717.

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Abstract Chromium carbide-nickel chromium coatings produced by HVOF spraying are widely used for high temperature wear and erosion resistant applications. Examination of the literature shows that whilst the mechanical properties of these coatings have been widely investigated, there has been little research into the physical processes occurring during HVOF spraying of this system, such as carbide dissolution, liquid-metallic phase oxidation, decarburisation and rapid solidification. The purpose of the present work has been to perform a systematic characterisation of the chromium carbide-nickel chromium system in both the initial powder and as-sprayed states with a variety of spraying conditions using optical, scanning and transmission electron microscopy, electron microprobe and X-ray diffraction. The presence of amorphous and nanocrystalline phases has been demonstrated. The nanocrystalline structures tend to be Ni rich, with the amorphous phases rich in Cr. Carbides of the form Cr3C2 were found to be dissolved slightly during spraying, increasing the Cr and C contents of the liquid metallic phase. There was no evidence of chromium carbide oxidation.

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Rapporti di organizzazioni sul tema "Chromium research"

Busby, Ryan, H. Torbert e Stephen Prior. Soil and vegetation responses to amendment with pulverized classified paper waste. Engineer Research and Development Center (U.S.), maggio 2022. http://dx.doi.org/10.21079/11681/44202.

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The United States Army produces a significant amount of classified paper waste that is pulverized to a fine consistency unsuitable for recycling. However, cheap, high quality organic materials such as classified paper waste are useful as soil amendments. The objective of this research was to evaluate the utilization of pulverized classified paper waste as a soil amendment to improve soil health and increase establishment of desirable native grasses on degraded Army training lands. Paper was applied at rates of 9 to 72 Mg ha⁻¹ to two soil types at Fort Polk, LA: an alfisol (very fine sandy loam - Fine, smectitic, thermic Chromic Vertic Hapludalfs) and an ultisol (loamy fine sandy - Loamy, siliceous, semiactive, thermic Arenic Paleudults). These are common soil orders found on military training lands nationwide and represent fertile (alfisol) and unfertile (ulitsol) soils. Vegetation and soils were monitored over 2 growing seasons. No increase in heavy metals were observed in soils. Extensive analysis showed very low levels of regulated contaminants in the paper, but most were below detection limits. The ultisol site showed improved soil physical and chemical properties, while desirable vegetation benefitted from nutrient immobilization at the alfisol site. Based on the results of this study, applying pulverized paper waste to soil at a rate of 35.9 Mg ha⁻¹ is recommended. Application of paper waste to soils had no adverse environmental effects, improved soil physiochemical properties, and facilitated establishment of desirable native vegetation.

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