Дисертації з теми "Sulfate groups"
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Mandarini, Elisabetta. "Decoding the role of HSPGs in tumor onset and progression through use of branched peptide probe." Doctoral thesis, Università di Siena, 2020. http://hdl.handle.net/11365/1094789.
Повний текст джерелаAhmed, Yassir Ahmed Mohmed Ali. "Heparan sulfate-protein interactions : evidence for sulfate group-dependent selectivity." Thesis, University of Liverpool, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.539728.
Повний текст джерелаProud, Andrew D. "Development of a protecting group for sulfate esters." Thesis, University of Edinburgh, 1999. http://hdl.handle.net/1842/12804.
Повний текст джерелаArai, Milton Hideaki. "Papel da atividade física regular realizada durante vários anos na função imune do idoso." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/5/5144/tde-14102014-093413/.
Повний текст джерелаThe main objective of this study was to assess the effect of regular practice of physical activity on immunosenescence, that is, the changes that occur when the immune system is affected by aging. The results of immune tests conducted on 20 elderly runners (mean age = 67 years) were compared to those of 20 elderly sedentary individuals (mean age = 66 years) and to those of 10 young sedentary individuals (mean age = 26 years). On average, the elderly runners had practiced this activity for the last 23 years, running a mean weekly distance of 39 kilometers. Their maximum oxygen consumption (VO2 max) was 52% higher than that of sedentary elderly group, and similar to that of the group of younger individuals. The immune parameters studied were: lymphocyte and lymphocyte subtype counts, the proliferative response of T-lymphocytes to mitogens, cytotoxic activity of natural killer cells and production of cytokines (interleukins 2, 3, 4, 6, 10 and 12). The same cytokines were measured in serum, but only in the two groups of elderly people. Elderly runners presented a significantly higher proliferative response of T-lymphocytes to OKT-3 as well as interleukin-2 production than the sedentary group. The production of interleukin-3 was also significantly lower in the group of runners. On the other hand, the results of these parameters did not differ significantly from those of young subjects. Serum levels of interleukins 3, 6, and 12 were significantly lower in elderly runners than in sedentary individuals. The impact of regular physical activity on serum levels of growth hormone, testosterone, and dehydroepiandrosterone sulfate (DHEAS), which are affected by aging (\"endocrinosenescence\"), was also studied. The serum levels of these anabolic hormones did not differ significantly between the groups of elderly runners and the elderly sedentary individuals. When the impact of regular physical activity on beta-endorphin was studied, again no significant difference in the serum levels of this neuropeptide was found between the two elderly groups. Owing to the possible involvement of the endocrine system in immunosenescence, the correlation between anabolic hormones and cytokines was assessed. No relevant correlation was found, especially between DHEAS and interleukin-6. The results indicate that the regular practice of physical activity for several years may delay immunosenescence
Kotler, Julia Michelle. "Biosignature storage in sulfate minerals- synthetic and natural investigations of the jarosite group minerals." The University of Montana, 2009. http://etd.lib.umt.edu/theses/available/etd-08062009-143516/.
Повний текст джерелаKatragkou, Eleni. "Aircraft based measurements of atmospheric sulfur dioxide and ground based measurements of gaseous sulfur (VI) in the simulated internal flow of an aircraft engine implications for atmospheric aerosol formation /." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=969654588.
Повний текст джерелаMatthews, Richard P. "Ion Pairing in Aqueous Metal Sulfates and Platinum Group Metal Ammonium Solutions." Doctoral thesis, University of Cape Town, 2010. http://hdl.handle.net/11427/6330.
Повний текст джерелаWuerch, Helmuth Victor. "Diagenesis and Water Chemistry of the Woodbine Group in the East Texas Basin." DigitalCommons@USU, 1986. https://digitalcommons.usu.edu/etd/6685.
Повний текст джерелаAbdellatif, Mohamed Moustafa. "Poly(arylene ether)s with Truly Pendant Benzene Sulfonic Acid Groups." Wright State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=wright1222544981.
Повний текст джерелаMulwanda, James. "Recovery of dissolved platinum group metals from a pregnant copper sulphate leach solution by precipitation." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86538.
Повний текст джерелаENGLISH ABSTRACT: In Base Metal Refineries (BMRs), the copper sulphate leach solution produced during the final pressure leaching stage contains impurities such as selenium and tellurium, as well as other precious metals (OPMs, namely Rh, Ru, and Ir). Se and Te are removed by precipitation with sulphur dioxide prior to electrowinning of Cu. While a small percentage of the dissolved OPMs precipitate with the Se and Te, the largest portion remains in solution and is recycled to the first stage leach. If a larger portion of the OPMs in solution can be recovered in the Se/Te precipitation stage, OPM losses and the OPM inventory of the plant can be reduced. The aim of this project was to determine operating conditions that would allow maximum OPM recovery with minimal Cu and Ni co-precipitation in the Se/Te removal section of a BMR. The effects that the operating temperature, pressure, stirring rate, reagent type, and reagent quantity have on the metal precipitation behavior and precipitate characteristics were determined experimentally. Thio-urea and sulphurous acid were evaluated as precipitation reagents for temperatures of 80°C and 160°C, stirring rates of 250 rpm and 500 rpm, and pressures equal to ambient pressure and 7 bar. 200 % and 320 % excess thio-urea and 720 % and 960 % excess sulphur dioxide were used. The precipitation of OPMs with sulphur dioxide was generally poor; the maximum percentage Rh, Ru, and Ir precipitated were 35 %, 18 %, and 20 %, respectively. It was, however, found that the OPM precipitation increased as the reagent amount was increased. Increasing the temperature further increased Rh and Ir precipitation but affected the Ru precipitation negatively. Thio-urea precipitated virtually all of the Rh contained in the solution irrespective of the values of the process variables studied. As was the case with sulphur dioxide, increasing the amount of thio-urea added resulted in increased Ru and Ir precipitation, while higher temperatures favored Ir precipitation but not Ru precipitation. The maximum percentage Ru and Ir precipitation achieved with thio-urea were 87 % and 60 %, respectively. Complete Se precipitation was observed at all process conditions, while Te precipitation increased as the operating temperature and the reagent quantity were increased. Maximum Te precipitation of 98 % and 90 % were achieved when using 320 % excess thio-urea and 960 % sulphurous acid quantities, respectively, at 160°C and a stirring rate of 250 rpm. Increasing the reagent quantity and temperature did, however, also result in increased copper and nickel precipitation. The statistical analysis of the results allowed regression models to be fitted to predict the percentage metal precipitation as a function of the investigated process variables. These models were used to define an objective function to determine the optimal operating conditions. A temperature of 80oC, a pressure of 7 bar, and 200 % excess thio-urea were proposed as the optimum operating conditions that would yield 98 % Rh, 75 % Ru, and 48 % Ir precipitation with less than 5 % Cu and Ni co-precipitation. Experimental validation tests confirmed the model predicted values and proved repeatability of the experimental data.
AFRIKAANSE OPSOMMING: Die kopersulfaat logingsoplossing wat tydens die finale drukloging stadium in Basis Metaal Raffinaderye (BMRe) produseer word, bevat onsuiwerhede soos selenium en tellurium sowel as ander edelmetale (AEMe, naamlik Rh, Ru, en Ir). Se en Te word voor Cu elektrowinning verwyder deur middel van presipitasie met swaweldioksied. Alhoewel ʼn klein persentasie van die opgeloste AEMe saam met die Se en Te presipiteer, bly die grootste gedeelte in oplossing en word gevolglik na die eerste loging stadium hersirkuleer. AEM verliese en die AEM inventaris van die aanleg kan verminder word indien ʼn groter gedeelte van die AEMe in die Se/Te presipitasie stadium herwin kan word. Die doel van hierdie projek was om bedryfstoestande te bepaal om maksimum AEM herwinning met minimale Cu en Ni kopresipitasie in die Se/Te verwyderingseksie van ʼn BMR te behaal. Die effekte wat bedryfstoestande soos temperatuur, druk, roerder tempo, tipe reagens, en hoeveelheid reagens op die metaal presipitasiegedrag en presipitaat eienskappe het, is eksperimenteel bepaal. Tio-ureum en swaweligsuur is evalueer as presipitasie reagense vir temperature van 80°C en 160°C, roerder tempo’s van 250 rpm en 500 rpm, en drukke gelyk aan omgewingsdruk en 7 bar. 200 % en 320 % oormaat tio-ureum en 720 % en 960 % oormaat swaweldioksied is gebruik. Die presipitasie van AEMe met swaweldioksied was swak in die algemeen; die maksimum persentasie Rh, Ru, en Ir presipitasie wat behaal is, is 35 %, 18 %, en 20 %, onderskeidelik. Daar is egter gevind dat die AEM presipitasie toeneem indien die hoeveelheid reagens toeneem. ʼn Toename in die temperatuur het verder tot ʼn toename in Rh en Ir presipitasie gelei, maar dit het Ru presipitasie negatief affekteer. Tio-ureum het basies al die Rh in oplossing laat presipiteer, ongeag die waardes van die ander prosesveranderlikes wat ondersoek is. Soos wat die geval vir swaweldioksied was, het ʼn toename in die hoeveelheid tio-ureum ʼn toename in die Ru en Ir presipitasie tot gevolg gehad, terwyl hoër temperature Ir presipitasie bevoordeel en Ru presipitasie benadeel het. Die maksimum persentasie Ru en Ir presipitasie wat met tio-ureum behaal is, is 87 % en 60 %, onderskeidelik. Volledige Se presipitasie is by alle proses toestande waargeneem, terwyl Te presipitasie toegeneem het soos wat die temperatuur en die hoeveelheid reagens toegeneem het. Maksimum Te presipitasie van 98 % en 90 % is behaal toe 320 % oormaat tio-ureum en 960 % oormaat swaweligsuur, onderskeidelik, by 160°C en ʼn roerder tempo van 250 rpm gebruik is. ʼn Toename in die hoeveelheid reagens en die temperatuur het egter ook meer koper en nikkel presipitasie tot gevolg gehad. Die statistiese analise van die resultate het dit moontlik gemaak om regressie modelle te pas om die persentasie metaal presipitasie as ʼn funksie van die ondersoekte veranderlikes te voorspel. Hierdie modelle is gebruik om ʼn doelfunksie te definieer ten einde die optimale bedryfstoestande te bepaal. ʼn Temperatuur van 80°C, ʼn druk van 7 bar, en 200 % oormaat tioureum is voorgestel as die optimale bedryfstoestande wat 98 % Rh, 75 % Ru, en 48 % Ir presipitasie met minder as 5 % Cu en Ni kopresipitasie tot gevolg sal hê. Eksperimentele geldigheidsbepalingtoetse het die waardes wat deur die modelle voorspel is bevestig en die herhaalbaarheid van die eksperimentele data bewys.
Schumacher, Trevor I. "Poly(arylene ether sulfone)s with Ammonium Groups Located on PendentPhenyl Sulfonyl Moieties for Anionic Exchange Membranes." Wright State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1468932871.
Повний текст джерелаMujumdar, Prashant. "Synthesis and Biological Evaluation of Unusual Natural Products and Novel Heterocyclic Chemotypes as Carbonic Anhydrase Inhibitors." Thesis, Griffith University, 2017. http://hdl.handle.net/10072/366972.
Повний текст джерелаThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Natural Sciences
Science, Environment, Engineering and Technology
Full Text
Miller, Suzanne M. "Examination of specific amino acid residues of desulfovibrio desulfuricans cytochrome C₃ in electron transfer." Diss., Columbia, Mo. : University of Missouri-Columbia, 2005. http://hdl.handle.net/10355/4252.
Повний текст джерела"December 2005" The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Vita. Includes bibliographical references.
Kern, Kimberly E. "Poly(arylene ether sulfone)s Carrying Pendant(3-sulfonated) phenyl sulfonyl Groups for use as Proton Exchange Membranes." Wright State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=wright1308770965.
Повний текст джерелаPETIT, EMMANUEL. "Synthese et etudes physico-chimiques de glucuronane et glucoglucuronane substitues par des groupes sulfate et hydrophobe en vue d'applications dans la regeneration tissulaire." Amiens, 2000. http://www.theses.fr/2000AMIE0103.
Повний текст джерелаBartelmehs, Kurt Lane. "Bond length and bonded radii variations in sulfide molecules and crystals containing main group elements." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/91160.
Повний текст джерелаM.S.
Hanauer, Kristina [Verfasser]. "Ferrocene as redox-functional group in N,N'-disubstituted (thio)ureas and sulfite oxidase mimicking molybdenum complexes / Kristina Hanauer." Mainz : Universitätsbibliothek Mainz, 2018. http://d-nb.info/1164255835/34.
Повний текст джерелаBaltas, Michel. "Sulfinamides fonctionnalises inhibiteurs de la coniferylalcool deshydrogenase : synthese, etude de complexation par l'ion zn**(2+), mecanisme d'hydrolyse basique et aminolyse des sulfinamoyl acetates : schema d'inactivation enzymatique via un intermediaire sulfine." Toulouse 3, 1987. http://www.theses.fr/1987TOU30145.
Повний текст джерелаKaukonen, R. (Risto). "Sulfide-poor platinum-group element deposits:a mineralogical approach with case studies and examples from the literature." Doctoral thesis, University of Oulu, 2008. http://urn.fi/urn:isbn:9789514289545.
Повний текст джерелаLe, Thi Kim-Thoa. "Luminescence de l'europium divalent dans les sulfures de magnésium ou d'éléments alcalino-terreux (sulfures MS, thioaluminates et thiosilicates)." Phd thesis, Université Sciences et Technologies - Bordeaux I, 1989. http://tel.archives-ouvertes.fr/tel-00168927.
Повний текст джерелаPermeh, Samanbar. "On the Role of the Pore Water Chemistry of Deficient Post-Tension Grout to Promote Steel Corrosion." FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/2445.
Повний текст джерелаPessayre, Stéphanie. "Action concertée entre un métal noble et une phase sulfure pour l'hydrotraitement poussé des gazoles." Lyon 1, 2000. http://www.theses.fr/2000LYO10178.
Повний текст джерелаDemirci, Umit Bilge. "Caractère bifonctionnel particulier des catalyseurs Pt, Ir, ou Pd supportés sur zircone sulfatée dans les réactions de reformage d'alcanes." Université Louis Pasteur (Strasbourg) (1971-2008), 2002. https://publication-theses.unistra.fr/public/theses_doctorat/2002/DEMIRCI_Umit_Bilge_2002.pdf.
Повний текст джерелаIsomerization reactions of n-alkanes, from nC6 to nC9, on sulphated zirconia supported platinum, iridium, or paladium, catalysts are described in this work, the aim being to contribute to better understand the mechanisms through which those reactants are rearranged. Despite the bifunctional character of the catalysts, the alkane transformation is not explained by the classical bifunctional mechanism. Our results are rather in favour of a metal-proton adduct model [(H-Mm)(Hx)x+], and an associative adsorption step. This adduct gathers the metallic and the acidic sites. All the reaction steps are achieved during a single residence of the molecule on the metallic function. The adsorbed species is an agostic species, for which a hydrogen atom, of a C-H bond of an alkyl group, is covalently bonded both to a carbon atom and to a transition metal atom. This particular bifunctional mechanism is confirmed by kinetic studies, which, moreover, display a hydrogen pressure influence on the catalysts reactivity. A transition from bifunctional catalysis to acid catalysis occurs with the increase of hydrogen pressure and with the enhancement of the reaction temperature
Choi, Adam. "Illuminating Biology with Membrane Penetrating Sulfonate Delivery Scaffolds and Near-Infrared Azasiline Fluorophores." eScholarship@UMMS, 2018. https://escholarship.umassmed.edu/gsbs_diss/997.
Повний текст джерелаMartin, Isabelle. "Développement d'une matrice à base d'aluminate de calcium pour la cimentation de boues issues de la décontamination d'effluents actifs." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30186/document.
Повний текст джерелаNuclear industry generated waste including radioactive wastes, which have different forms and origins. The wastes produced by reprocessing of nuclear fuel are characterized by important water content, by high pH and temperature sensitivity. The cementation in ettringite systems might be a promising solution to solidify radioactive wastes. Mixtures of Calcium Aluminate Cement (CAC) and calcium sulfate are planned to be used, instead of Ordinary Portland Cement (OPC), to form a significant amount of ettringite able to catch water molecules when forming. Moreover, due to the low pH of CAC-based matrices, the latter have a good compatibility with the compounds used to stabilize active elements. Initially, the stability of the sorbent of cesium used in this study was tested in different pH environments (2 to 14) and temperature. Chemical analysis and different microstructural characterizations like X-ray diffraction, FTIR and SEM-EDS have allowed to set stability limits of ettringite systems. Then microstructural study on binary systems composed by mixture of CAC/calcium sulfate (hemihydrate and/or anhydrite) was realized to characterize ettringite stability during the time of hydration. Low pH properties were checked by chemical pore solutions analysis. However, the heat generated by hydration and the possible formation of expansive systems require an increase of e/s ratio and additional components like Ground Granulated Furnace Slag (GGBS). These two parameters were studied subsequently. Microstructural study of GGBS reactivity and the modification of ettringite assemblage were showed that GGBS act as filler at early time of hydration. To promote the GGBS reactivity at long term of hydration by alkaline and sulfate activation, different nature of calcium sulfate was used. Then the microstructural characteristic of this ternary system in presence of different e/s ratio was studied. Finally, different information on the effect of formulation parameters obtained led to the development of tests on formulations containing an inert simulated waste and enriched in chlorides. Systematic tests of fluidity, mechanical strength and for some expansion and heat generation should identify a series of mixtures adapted to test prototype to industrial scale for cementing wastes
Badami, Anand Shreyans. "Morphological and Structure-Property Analyses of Poly(arylene ether sulfone)-Based Random and Multiblock Copolymers for Fuel Cells." Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/29469.
Повний текст джерелаPh. D.
Ohnenstetter, Daniel. "Minéralisations associées aux complexes mafiques-ultramafiques en domaine océanique et continental." Nancy 1, 1990. http://docnum.univ-lorraine.fr/public/SCD_T_1990_0539_OHNENSTETTER.pdf.
Повний текст джерелаSoldera, Armand. "Synthese et caracterisation de nouveaux composes smectiques c* ferroelectriques contenant un cur rigide de type tolane et un groupe sulfinate chiral." Université Louis Pasteur (Strasbourg) (1971-2008), 1992. http://www.theses.fr/1992STR13032.
Повний текст джерелаHarper, Matthew P. "Platinum Group Element Mineralization in "Ballrooms" of the J-M Reef of the Stillwater Complex, Montana." Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd442.pdf.
Повний текст джерелаPollet, Pamela. "Métallation ortho-dirigée par des groupes sulfures en série diazinique. Synthèses de sulfoxydes chiraux et étude de l'induction asymétrique de ces groupes en série aromatique π-déficitaire". Rouen, 1998. http://www.theses.fr/1999ROUES028.
Повний текст джерелаMatson, Johan. "Coffee grounds as an adsorbent for heavy metals in water treatment : Study based on the environment around Vattenriket, Kristianstad." Thesis, Linnéuniversitetet, Institutionen för biologi och miljö (BOM), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-96299.
Повний текст джерелаMattoussi, Nabila. "Assemblages supramoléculaires par complexation moléculaire ou métallique de calix[4]arène fonctionnalisés par des groupes sulfonate et carboxylate : synthèse, cristallisation et détermination des structures cristallines." Thesis, Lyon 1, 2013. http://www.theses.fr/2013LYO10325.
Повний текст джерелаThis work presents the synthesis of calixarenes functionalized with sulfonate and carboxylate groups and the detailed study of the crystal structures of their molecular or metal complexes with 3d and 4f metals ions. One of the major concerns of this work is the understanding of supramolecular assemblies in these systems. The first chapter gives bibliographic elements on the history, the different conformations and the main methods of functionalization of calixarenes and on their supramolecular chemistry comprising molecular and metal complexes. The second chapter is dedicated to a series of molecular complexes of the host-guest type formed between the para-sulfonatocalix[4]arene (SC4) and various bipyridine. In continuation with this work we then present the synthesis, structure and magnetic properties of a metal complex comprising a SC4 bridging by the sulfonate groups two iron(II) dinuclear entities with coordinated phenathroline [FeIII2 (μ-O)(H2O) 5(phen) 2]. The third chapter is devoted to the coordination chemistry of sulfonated calixarenes with lanthanides. We have found three types of crystal structures which are polymers wherein the lanthanide ion function as an assembler of calixarenes by the coordination of the sulfonate groups along three type of structure (A, B and C). We obtained these three structures (A, B and C) for all lanthanide (La, Pr, Nd, Eu, Gd, Tb, Dy, Ho, Yb). The fourth chapter concerns the coordination chemistry of 3d transition metals (Co, Mn, Zn) with calixarenes functionalized with carboxylate groups on lower rim. With calixarene dicarboxylate we got a series of isomorphic complexes in which two calixarenes are coordinated to two metal centers to form infinite chains. The fifth chapter presents the results of an exploratory work to synthesize azacalix[4]arene with the aim to complex transition metals ions. The EPR study of the precursors has evidenced free radical species
Ando, Daisuke. "Studies on the novel selective β-O-4 cleavage method of lignins by E1cB type elimination reaction assisted by the sulfone group -γ-TTSA method-". Kyoto University, 2014. http://hdl.handle.net/2433/188762.
Повний текст джерела0048
新制・課程博士
博士(農学)
甲第18324号
農博第2049号
新制||農||1021(附属図書館)
学位論文||H26||N4831(農学部図書室)
31182
京都大学大学院農学研究科森林科学専攻
(主査)教授 髙野 俊幸, 教授 西尾 嘉之, 教授 梅澤 俊明
学位規則第4条第1項該当
El-Batta, Amer Adnan. "Part I, copper(I) iodide dimethyl sulfide catalyzed 1,4-addition of alkenyl groups from alkenylzirconium and alkenylzinc reagents and their application toward the total synthesis of azaspirene ; Part II, aqueous Wittig chemistry employing stabilized ylides and aldehydes." Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2007. http://wwwlib.umi.com/cr/ucsd/fullcit?p3268346.
Повний текст джерелаTitle from first page of PDF file (viewed August 7, 2007). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 265-280).
Seat, Zoran. "Geology, petrology, mineral and whole-rock chemistry, stable and radiogenic isotope systematics and Ni-Cu-PGE mineralisation of the Nebo-Babel intrusion, West Musgrave, Western Australia." University of Western Australia. School of Earth and Geographical Sciences, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0202.
Повний текст джерелаFleischhacker, Ján. "Vliv technologie výroby popílkového pórobetonu na vznik tobermoritických fází." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240077.
Повний текст джерелаGueddari, Khalid. "Approche géochimique et physico-chimique de la différenciation des éléments du groupe du platine (PGE) et de l'or dans le manteau supèrieur bético-rifain et dans les xénolites de péridotites sous continentales." Université Joseph Fourier (Grenoble), 1996. http://www.theses.fr/1996GRE10031.
Повний текст джерелаSchenck, Charles. "Pollution saline de l'eau souterraine et de l'air liee aux activites economiques en haute alsace : incidences agronomiques." Université Louis Pasteur (Strasbourg) (1971-2008), 1987. http://www.theses.fr/1987STR13220.
Повний текст джерелаDavid, Marta Edith Velásquez. "Composição isotópica de Pb-Sr e Nd da mineralização de ouro do depósito Córrego do Sítio, Quadrilátero Ferrífero (MG): implicações na modelagem conceitual." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/44/44141/tde-19042007-142433/.
Повний текст джерелаThe Quadrilátero Ferrífero is an important geotectonic unit of the São Francisco Craton that host iron and gold deposits within the vulcanosedimentary rocks of the greenstone belt Rio das Velhas. The geodynamic evolution of this greenstone includes several tectonometamorphic events. Gold deposits were formed by epithermal fluids, remobilized during the Proterozoic orogenic processes, are associated whit the banded iron formations and are sporadically disseminate in metapelitic rocks within the top of the greenstone sequence. In the ores is common the crystallization of iron sulfide minerals during diverse stages. Gold deposits have an important structural control by folds, reverse faults and strike-slip shearing zones, and are commons several hydrothermal alteration processes like sericitization, chloritization and carbonate usually related to the deformation. The Córrego do Sítio gold deposit is hosted in turbiditic siliciclastic rocks that are metamorphosed in the greenschist facies. The gold is associated with the iron sulfide arsenopyrite and pyrite, which are disseminated in metapelitic rocks and quartz-carbonate veins. The mineralization includes vary stages of crystallization, (1) pyrite and pyrrotite (2) arsenopyrite, pyrrotite and fine pyrite, (3) arsenopyrite whit pyrrotite and sulphosalts in quartz vein, and (4) pervasive pyrite. An integrated Pb, Sr e Nd, isotopic study of the Córrego do Sítio deposit allowed to identify that sources of the mineralizing fluids was the host rocks, that in the policiclic evolution the gold mineralizaton had participation events of metamorphism and hidrothermalism to age 2.2, 2.0 and 0.6 Ga. respectively the wich induced the hydrothermal circulation processes in the study area. The isotopic character of this deposit and its comparison with similar ones, suggest that the gold and its metals associated it is deposited in Córrego do Sítio to age 2.2 Ga. and that metals were derived from the banded iron formations, and remobilized by hidrothermal fluids across reverse faults. Although U-Pb (SHRIMP) and K-Ar geochronologic data were not conclusive to constrain the age of the mineralization, they provide to age ~2.7 Ga. that a good limit for the sedimentation of the host rock. It is suggest that there is a potential for gold prospection within the metapellitic rocks associated with banded iron formation of the Greenstone Rio das Velhas, and that the more relevant targets include areas with inverse and strike-slip fault.
Madi, Atman. "Géologie de la partie nord de l'ophiolite d'Oman : pétrologie et géochimie de la séquence plutonique du massif de Fizh." Phd thesis, Grenoble 1, 1995. http://www.theses.fr/1995GRE10061.
Повний текст джерелаLeeMing-Chuan and 李明川. "Competitive reaction kinetics of microbial groups in expanded granular sludge bed reactors treating sulfate-containing wastewater." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/40906635843514219683.
Повний текст джерела崑山科技大學
環境工程研究所
95
To examine the competitive-reaction kinetic behavior of sulfate-reducing bacteria (SRB) and methanogenic bacteria (MB) in expanded granular sludge bed (EGSB) reactors treating sulfate-containing wastewater, four identical EGSB reactors (with acetate as a feed substrate) were used. The two EGSB reactors were respectively used to enrich SRB and MB, and thereby the break-up granules (dispersed sludge) can be used to determine intrinsic and apparent biokinetic parameter values of SRB and MB. The other two EGSB reactors were used to proceed with Phase I and II experiments treating sulfate-containing wastewater. Thus, not only water quality data and granule characteristic parameters (granule diameter, microbial density, and biomass) can be obtained, but the mass fractions of SRB and MB (fSRB, fMB) for each test run of the EGSB reactors also be estimated by mixing break-up granules obtained from the experimental system with that obtained from the enrichment system at various proportions. In phase I experiment, the two EGSB reactors were maintained at the organic loading rate (OLR) of 4.0 kg COD/m3-d) but with six different influent COD/SO42- ratios (0.5, 0.8, 1.1, 1.3, 1.8, and 3.0). Phase II experiment proceeded immediately following the last test run of phase I experiment [i.e., the influent COD/SO42- ratios of 1.1 (SRB was a predominant microbial group) and 3.0 (MB was a predominant microbial group)] but with successive increasing OLRs from 4.0 to 6.0, 6.3, 6.8, 7.2, 7.6, 8.0, 8.3, 8.7 and 9.0 kg COD/m3-d. Taking account of inhibiting effects of free H2S on SRB and MPB, a kinetic model for EGSB reactors treating sulfate-containing wastewater was also developed and validated by experiments. When the EGSB reactors were maintained at the OLR of 4.0 kg COD/m3-d but with six different influent COD/SO42- ratios (0.5, 0.8, 1.1, 1.3, 1.8, and 3.0), the concentrations of sulfide (77–564 mg S/L) and free H2S (40–293 mg S/L) in the effluent decreased with increasing influent COD/SO42- ratio and the acetate removal efficiency achieved greater than 98.5%, showing that sulfide/H2S did not impose an inhibiting effect on microbial groups. Meanwhile, the average granule diameter (dp) slightly decreased with increasing influent COD/SO42- ratio; fSRB decreased with increasing influent COD/SO42- ratio whereas fMB increased with increasing influent COD/SO42- ratio. It was also found that SRB became a predominant microbial group when the influent COD/SO42- ratio was maintained at less than/equal to 1.3, whereas MB became a predominant microbial group when the influent COD/SO42- ratio was maintained at greater than/equal to 1.8. By using the performance data and the mass fractions of SRB and MB together with a stoichiometric chemical equation, the calculated specific substrate utilization rate of SRB (0.39–0.62 mg acetate/mg VSS-d) was lower than that of MB (0.57–1.01 mg acetate/mg VSS-d). When the EGSB reactors were maintained at the influent COD/SO42- ratios of 1.1 (SRB was a predominant microbial group) and 3.0 (MB was a predominant microbial group) but with increasing OLR from 4.0 to 6.0, 6.3, 6.8, 7.2, 7.6, 8.0, 8.3, 8.7 and 9.0 kg COD/m3-d, the acetate removal efficiency still achieved 96.1–97.9% and 94.9–98.9%, respectively, disclosing that H2S (286–368 mg S/L) in the bulk liquid did not impose a significant inhibiting effect on SRB and that H2S (88–123 mg S/L) in the bulk liquid also did not impose a significant inhibiting effect on MB. However, with a further increase in OLR (8.7 kg COD/m3-d), the acetate removal efficiency of the EGSB reactor with the predominant microbial group of SRB declined to 80.5%, implying that H2S (429 mg S/L) in the bulk liquid imposed a significant inhibiting effect on SRB. With a further increase in OLR (9.0 kg COD/m3-d), the acetate removal efficiency of the EGSB reactor with the predominant microbial group of MB still achieved 94.1–97.8%, revealing that H2S (128–140 mg S/L) in the bulk liquid did not impose an inhibiting effect on MB. Meanwhile, with an increase in OLR, granule’s specific gravity, dp, microbial density, and biomass increased but fSRB and fMB varied slightly. By comparing the obtained intrinsic and apparent biokinetic parameters of SRB with those of MB, kSR (1.99 mg acetate/mg VSS-d) and kSR’ (1.74 mg acetate/mg VSS-d) were higher than kM (1.57 mg acetate/mg VSS-d) and kM’ (1.30 mg acetate/mg VSS-d); if acetate was growth-limiting for both SRB and MB, Ks,M (10 mg acetate/L) and Ks,M’ (15 mg acetate/L) were lower than Ks,a (27 mg acetate/L) and Ks,a’ (30 mg acetate/L), implying that the affinity of acetate to MB was greater than that to SRB; KI,M (263 mg H2S/L) and KI,M’ (429 mg H2S/L) were lower than KI,SR (289 mg H2S/L) and KI,SR’ (557 mg H2S/L), implying that free H2S imposed a greater inhibiting effect on MB. Finally, by inserting operating conditions and biological and physical parameter values into the kinetic model, the calculated acetate removal efficiency was only 11.6% deviated from the experimental acetate removal efficiency. Accordingly, the proposed kinetic model can be used to predict the treatment performance of EGSB reactors appropriately.
Ingram, Laura Jane. "The Synthesis of Sulfated Carbohydrates Using a Sulfate Protecting Group Strategy." Thesis, 2010. http://hdl.handle.net/10012/5437.
Повний текст джерелаGonzález, Martín Rubén. "N-Butane isomerization catalyzed by hydroxyl groups on sulfated zirconia." 1995. http://catalog.hathitrust.org/api/volumes/oclc/34681804.html.
Повний текст джерелаTypescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 176-192).
"Biosignature storage in sulfate minerals- synthetic and natural investigations of the jarosite group minerals." UNIVERSITY OF MONTANA, 2010. http://pqdtopen.proquest.com/#viewpdf?dispub=3369197.
Повний текст джерелаXU, LAI, and 徐賚. "Reversal Glycosylation with Sulfonate Leaving-Group in Glycosyl Acceptor." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/ggw4b3.
Повний текст джерела輔仁大學
化學系
105
Part 1: A reversal glycosylation method is proposed to introduce a sulfonate group at the sugar receptor and a hydroxyl group at the anomeric carbon of the saccharide. The sulfonic acid ester group of the sugar receptor is catalytically converted to the saccharide body by alkaline or acidic conditions, the leaving group is constructed, followed by a basic or acidic catalyzed glycosylation. Part 2: Try to use monosaccharides with simple protection to connect with diol and unsubstituted pyridine at anomeric carbon, selectively generate carbohydrate- Modified 1- (Substituted alkyl)-2 (1H) Pyridones.
White, Christopher. "Low-sulfide PGE-Cu-Ni Mineralization from Five Prospects within the Footwall of the Sudbury Igneous Complex, Ontario, Canada." Thesis, 2012. http://hdl.handle.net/1807/32849.
Повний текст джерелаCai, Jie-Cheng, та 蔡傑丞. "Synthesis and Properties ofα-Methylstilbene Based Aryl Ether Sulfone Copolymers Containing Sulfuric Acid Group". Thesis, 2005. http://ndltd.ncl.edu.tw/handle/44655600334275864318.
Повний текст джерела國立成功大學
化學工程學系碩博士班
93
A designed series of directly copolymerized homo- and disulfonated copolymers containing controlled degrees of pendant sulfonic acid groups have been synthesized via nucleophilic step polymerization. Novel sulfonated poly (arylene ether sulfone) copolymers using α-methylstilbene (HMS), with dichlorodiphenyl sulfone (DCDPS) and 3,3’-disodiumsulfonyl-4,4’-dichlorodiphenylsulfone (SDCDPS) were investigated. Molar ratios of DCDPS and SDCDPS were systematically varied to produce copolymers of controlled compositions, which contained up to 70 mol% of disulfonic acid moiety. The goal is to identify thermally, hydrolytically, and oxidatively stable high molecular weight, film-forming, ductile ion conducting copolymers, which had properties desirable for proton exchange membranes (PEM) in fuel cells. The sulfonated copolymers were prepared in the sodium-salt form and converted to the acid moiety and subsequently investigated as proton exchange membranes for fuel cells. Hydrophilicity increased with the level of disulfonation, as expected. Moreover, water sorption increased with increasing mole percent incorporation of SDCDPS. The copolymers’ water uptake depended on both bisphenol structure and degree of disulfonation. Furthermore, the acidification procedures were shown to influence the Tg, water uptake, and conductivity of the copolymers. Proton conductivities for the sulfonated copolymers, under fully hydrated conditions, were a function of bisphenol structure and degree of sulfonation. A careful balance of copolymer composition and acidification method was necessary to afford films which can be both ductile and proton conductive. The copolymers of optimum design yielded conductivities of 0.1 S/cm or higher, which were comparable to those of commercial polyperfluorosulfonic acid films (Nafion™ ).
LIN, JIN-QUE, and 林金雀. "Studies on the synthesis and properties of contain sulfone and benzimideazole groups of polyamide-esters, polyamides and polyimides." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/13420994010959252790.
Повний текст джерелаvan, Eck M. "The geology and lithogeochemistry of the Palaeozoic Seventy Mile Range Group at Mt. Farrenden, Charters Towers, North Queensland, Australia." Thesis, 1994. https://eprints.utas.edu.au/21821/1/whole_vanEckM1994_thesis.pdf.
Повний текст джерелаAghajanyan, Manuk. "Chemical resistance of lime-based grouts for masonry strengthening." Master's thesis, 2016. http://hdl.handle.net/10198/13178.
Повний текст джерелаAs paredes de alvenaria de pedra estão presentes em muitos edifícios e monumentos históricos, com valor patrimonial inegável, mas também em edifícios antigos de habitação de construção antigos, tanto em Portugal como na Europa. Grande parte destas edificações em alvenaria encontra-se, em certos casos, num elevado estado de degradação pelo que necessitam de intervenção urgente. Isto requer a identificação das deficiências e a aplicação de técnicas de intervenção apropriadas. Uma das técnicas possíveis para trabalhos de consolidação estrutural das paredes de alvenaria de pedra é a injeção de argamassas fluidas denominadas correntemente por caldas. A escolha destas caldas é muito importante no que respeita, em particular, às suas propriedades químicas e físicas. Neste estudo, realizado no âmbito do Mestrado em Engenharia Química, foram utilizados dois tipos de caldas à base de cal, com a finalidade de comparar e avaliar a sua resistência química face à cristalização de sais solúveis. Uma das caldas é uma mistura pré-doseada comercialmente disponível, a Mape-Antique I da empresa Mapei (CA) e a segunda calda é uma mistura preparada em laboratório (LB), composta por metacaulino, cimento, cal hidratada, água e um superplastificante. Com o proposto de avaliar a ação dos sulfatos sobre estas caldas, submeteram-se uma série de provetes a ciclos molhagem-secagem usando duas temperaturas diferentes, 20 °C e 50 °C. Durante a experiência determinou-se a variação do peso e da resistência à compressão das caldas analisadas, assim como a concentração de ião sulfato e pH da solução onde foram mergulhadas as amostras. A calda comercial (CA) apresenta aparentemente uma resistência química aos sulfatos superior, no entanto a calda LB mostrou ter, em alguns parâmetros, resultados positivos.