Tesis sobre el tema "Ion exchange chromatography"
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Polite, Lee Nicholas. "Studies in ion exchange chromatography". Diss., Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/54338.
Texto completoPh. D.
Cao, Liming. "Protein Separation with Ion-exchange Membrane Chromatography". Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-050405-174109/.
Texto completoMaketon, Supachai. "Methods Development for Ion Chromatography". Thesis, North Texas State University, 1986. https://digital.library.unt.edu/ark:/67531/metadc330927/.
Texto completoForrer, Nicola. "Antibody purification with ion-exchange chromatography". Zürich : ETH, 2008. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17784.
Texto completoGalindo, Irma C. (Irma Concepcion). "Investigation Into the Causes for the Loss of Resolution in an Ion Chromatograpy Resin". Thesis, North Texas State University, 1988. https://digital.library.unt.edu/ark:/67531/metadc798197/.
Texto completoPearson, C. H. G. "New ion exchange resins for ion chromatography applied to anions". Thesis, University of Kent, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372771.
Texto completoAllyn, M. Liz. "Indirect photometric chromatography of iodide ion in aqueous solutions /". Online version of thesis, 1987. http://hdl.handle.net/1850/8769.
Texto completoHuang, Julie Shiong-Jiun. "Ion Chromatography of Soluble Cr(III) and Cr(VI)". Thesis, University of North Texas, 1988. https://digital.library.unt.edu/ark:/67531/metadc500410/.
Texto completoBorghi, Andrea. "Cellulose hollow fibers membranes for ion-exchange chromatography". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/20289/.
Texto completoMcCannel, Anne Marie. "Separation of immunoglobulins from egg yolk using metal chelate interaction chromatography and ion exchange chromatography". Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/27987.
Texto completoLand and Food Systems, Faculty of
Graduate
Langford, John F. Jr. "Effects of adsorbent structure and adsorption on transport phenomena in ion-exchange chromatography". Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 250 p, 2007. http://proquest.umi.com/pqdweb?did=1251904681&sid=1&Fmt=2&clientId=8331&RQT=309&VName=PQD.
Texto completoPribyl, Ondrej. "Modelling of electrochemical ion exchange". Thesis, University College London (University of London), 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325234.
Texto completoNaidoo, Clive. "Selective separation of elements and radioisotopes by ion exchange chromatography". Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/53046.
Texto completoENGLISH ABSTRACT: The equilibrium distribution coefficients of 32 metal ions [Al(llI), As(V), CdïIl), Ce(III), Ce(IV), Co(n), Cr(III), Cu(II), Fe(III), Ga(III), Ge(IV), !n(III), La(III), Mn(II), Mo(VI), Nb(V), Ni(II), Pr(III), Sb(V), Sc(III), Se(IV), Sn(IV), Ta(V), Tb(III), Te(IV), Ti(IV), Vev), W(VI), Y(III), Yb(III), Zn(lI) and Zr(IV)] on a cation exchanger (Bio- Rad® AG50W-X8) and an anion exchanger (Bio-Rad® AG1-X8) in varying oxalic acid - sulphuric acid mixtures were successfully determined. The equilibrium distribution coefficients of these selected metal ions were determined in both 0.05 M and 0.25 M oxalic acid at various concentrations of sulphuric acid (0.005 M, 0.05 M, 0.10 M, 0.25 M, 0.50 M, 1.00 M, 1.50 M and 2.00 M). Attempts to explain the sorption behaviour of the selected metal ions were made by using MINEQL+, a speciation modelling program, and the speciation systems for AI(III), Cd(II), Co(II) and Zn(lI) in varying oxalic acid - sulphuric acid mixtures were determined. Two component [Zr(IV)-La(III); AI(III)-La(III); Ga(IlI)-Zn(II); As(V)-Zn(II); Cu(II)- Ce(IV); Ga(III)-Ce(IV); Ge(IV)-Ce(III); Mo(VI)- Y(III); Nb(V)- Y(III); Ga(III)-Co(II); As(V)-Co(lI) and Fe(III)-Mn(II)] and three component [Fe(III)-Ga(III)-Zn(lI) and Zr(IV)-Ta(V)-Yb(III)] mixtures on a 10 ml or 13 ml cation exchange resin in a variety of oxalic acid - sulphuric acid mixtures were successfully separated. Two component [As(V)-Zr(IV); Co(II)-Fe(III); Ni(II)-Co(lI) and Ni(II)-Fe(III)] and three component [Ni(II)-As(V)-Se(IV); AI(III)-Zn(II)-Ge(IV) and As(V)-Cu(II)-Ge(IV)] mixtures on a 10 ml or 13 ml anion exchange resin in a variety of oxalic acid - sulphuric acid mixtures were also successfully separated and studied. It was also shown how some of the elution curves developed above could easily be adapted for radiochemical separations. Usin~ the relevant data from the above study, a separation for 68Gefrom a Ga20 target was developed according to a method based on acid dissolution of the target and chromatography on an anion exchange resin (Bio-Rad® AG1-X8). The separated 68Geshowed high radionuclidic purity and an acceptable chemical purity.
AFRIKAANSE OPSOMMING: Die ewewigsverdelingskoëffisiënte van 32 metaalione [Al(III), As(V), Cd(II), Ce(III), Ce(IV), Co(II), Cr(III), Cu(II), Fe(III), Ga(III), Ge(IV), In(III), La(III), Mn(ll), Mo(VI), Nb(V), Ni(ll), Pr(Ill), Sb(V), Sc(III), Se(IV), Sn(IV), Ta(V), Th(Ill), Te(IV), Ti(IV), vrv; W(VI), Y(III), Yb(III), Zn(lI) en Zr(IV)] op 'n katioonruiler (Bio-Rad® AG50W-X8) en 'n anioonruiler (Bio-Rad® AG1-X8) in veranderende oksaalsuurswaelsuurmengsels is met welslae bepaal. Die ewewigsverdelingskoëffisiënte van hierdie geselekteerde elemente is in beide 0.05 Men 0.25 M oksaalsuur by verskeie konsentrasies swaelsuur (0.005 M, 0.05 M, 0.10 M, 0.25 M, 0.50 M, 1.00 M, 1.50 M en 2.00 M) bepaal. Daar is gepoog om die sorpsiegedrag van die geselekteerde metaalione te verklaar deur die gebruik van MINEQL+, 'n spesiëringmodelleringsprogram, en die spesiëringsisteme vir AI(III), Cd(II), Co(II) en Zn(lI) in veranderende oksaalsuur-swaelsuurmengsels is bepaal. Tweekomponent [Zr(IV)- La(III); AI(III)-La(II!); Ga(III)-Zn(Il); As(V)-Zn(II); Cu(II)-Ce(IV); Ga(III)-Ce(IV); Ge(IV)-Ce(Il!); Mo(VI)- Y(III); Nb(V)- Y(ll!); Ga(Ill)-Co(Il); As(V)-Co(lI) en Fe(III)- Mn(II)] en driekomponent [Fe(III)-Ga(III)-Zn(ll) en Zr(IV)- Ta(V)- Yb(III)] mengsels op 'n 10 ml of 13 ml katioonruilhars in 'n verskeidenheid oksaalsuurswaelsuurmengsels is met welslae geskei. Tweekomponent [As(V)-Zr(IV); Co(II)- Fe(III); Ni(Il)-Co(lI) en Ni(II)-Fe(III)] en driekomponent [Ni(II)-As(V)-Se(IV); AI(III)-Zn(Il)-Ge(IV) en As(V)-Cu(II)-Ge(IV)] mengsels op 'n 10 ml of 13 ml anioonruilhars in 'n verskeidenheid oksaalsuur-swaelsuurmengsels is ook met welslae geskei en bestudeer. Daar is ook aangetoon hoe sommige van die elueringskrommes wat hierbo ontwikkel is, maklik vir radiochemiese skeidings aangepas sou kon word. Deur gebruik te maak van die relevante data uit die studie hierbo, is 'n skeiding vir 68Geuit 'n Ga20-teiken ontwikkel volgens 'n metode gebaseer op suurdissolusie van die teiken en chromatografie op 'n anioonruilhars (Bio-Rad® AG1-X8). Die geskeide 68Gehet hoë radionukliedsuiwerheid en 'n aanvaarbare chemiese suiwerheid getoon.
Colby, Christopher Brett. "Optimisation of scale-up of chromatography /". Title page, table of contents and abstract only, 1997. http://web4.library.adelaide.edu.au/theses/09PH/09phc686.pdf.
Texto completoChokazinga, Davlin. "Coordination studies of inositols with aluminium and related cations". Thesis, Curtin University, 2003. http://hdl.handle.net/20.500.11937/2003.
Texto completoTrilisky, Egor. "Stationary and mobile phase selection for ion-exchange chromatography of viruses". Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 266 p, 2009. http://proquest.umi.com/pqdweb?did=1674096451&sid=1&Fmt=2&clientId=8331&RQT=309&VName=PQD.
Texto completoKumar, Guneet. "Design of anion exchange cellulose hydrogel for large proteins". Diss., This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06062008-163945/.
Texto completoSENEDA, JOSE A. "Comportamento de cobre (II) e uranio (VI) em cromatografia de precipitacao no sistema resina anionica forte-hexacianoferrato (II)". reponame:Repositório Institucional do IPEN, 1997. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10489.
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Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
Arcanjo, Maria Rosiene Antunes. "Study on the adsorption of lactic acid by ion exchange chromatography". Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=13346.
Texto completoCurrently the demand for renewable fuels has increased a lot. Thus, biodiesel is an alternative to oil and its derivatives, since its production is cheaper, there is a reduction in emissions, and is considered a renewable energy. Due to government incentives that drive the production of biodiesel, such fuel has been produced on a large scale. Of all the raw material used for producing biodiesel via transesterification, 10 % in mass is converted into glycerin, excess demand and absorption capacity of the current markets. In this context, it is of fundamental importance to develop alternative technologies and innovative at the same time to consume this surplus of crude glycerin. The production of lactic acid by hydrothermal conversion of glycerol is an alternative that adds significantly to the productivity of the biodiesel industry value, besides the production of an organic acid that is widely used industrially. This organic acid exists as two optical isomers, D - lactic acid and L- lactic acid. Presently, it has become an important monomer in the plastics industry, and polymerized biodegradable plastics such as poly-L- lactic acid and copolymers of lactic acid. Therefore, there is a continued interest in a more efficient process for the production of lactic acid as well as for their recovery and purification. Thus, the aim of this study was to conduct a study on the adsorption of lactic acid (derived from the conversion of glycerol resulting from biodiesel production) by ion exchange by Amberlite IRA 67 and IRA 96. Different eluents were evaluated at various concentrations in order to obtain a higher efficiency in removing lactic acid adsorbents studied. From the breakthrough curves obtained with different concentrations of lactic power (60-302 g/L) acid the adsorption isotherms were constructed at temperatures of 30 ÂC, 40 ÂC and 60 ÂC. With data from lactic acid concentration for each condition studied, became the model fit the Langmuir adsorption isotherm. Studies on the purification column fixed bed with mono-component solutions, binary mixtures and real mixture were also performed. It was concluded that the application of the proposed methodology for the purification of lactic acid in a fixed-bed column showed better results when the condition (temperature = 30 ÂC) was used in both adsorbents. As the Amberlite IRA 96, the adsorbent showed better performance in the adsorption of lactic acid.
Atualmente a procura por combustÃveis renovÃveis tem aumentado muito. Deste modo, o biodiesel surge como alternativa em relaÃÃo ao petrÃleo e seus derivados, jà que sua produÃÃo à mais barata, hà uma diminuiÃÃo na emissÃo de poluentes, e à considerada uma energia renovÃvel. Devido aos incentivos governamentais que impulsionam a produÃÃo de biodiesel, tal combustÃvel tem sido produzido em larga escala. De toda a matÃria-prima utilizada para a produÃÃo de biodiesel, atravÃs de transesterificaÃÃo, 10% em massa à convertida em glicerina, excedendo a demanda e capacidade de absorÃÃo dos mercados atuais. Neste contexto, à de fundamental importÃncia o desenvolvimento de tecnologias alternativas e ao mesmo tempo inovadoras para consumir este excedente de glicerina bruta. A produÃÃo de Ãcido lÃtico por conversÃo hidrotÃrmica do glicerol à uma alternativa que agrega um valor significativo para a produtividade da indÃstria de biodiesel, alÃm da produÃÃo de um Ãcido orgÃnico que à amplamente utilizado industrialmente. Esse Ãcido orgÃnico existe como dois isÃmeros Ãpticos, D-Ãcido lÃtico e L-Ãcido lÃtico. Atualmente, tem se tornado um importante monÃmero na indÃstria de plÃsticos, sendo polimerizado em plÃsticos biodegradÃveis, tal como poli-L-Ãcido lÃtico e seus copolÃmeros de Ãcido lÃtico. Por isso hà um interesse contÃnuo em um processo mais eficiente para a produÃÃo de Ãcido lÃtico, assim como para a sua recuperaÃÃo e purificaÃÃo. Dessa maneira, o objetivo desse trabalho foi realizar um estudo sobre a adsorÃÃo de Ãcido lÃtico (oriundo da conversÃo do glicerol resultante da produÃÃo do biodiesel) por cromatografia de troca iÃnica pelas resinas Amberlite IRA 67 e IRA 96. Foram avaliados diferentes eluentes em concentraÃÃes diversas, afim de se obter uma maior eficiÃncia na remoÃÃo de Ãcido lÃtico dos adsorventes estudados. A partir das curvas de ruptura obtidas com diferentes concentraÃÃes de alimentaÃÃo de Ãcido lÃtico (60-302 g/L) foram construÃdas as isotermas de adsorÃÃo nas temperaturas de 30ÂC, 40ÂC e 60ÂC. Com os dados de concentraÃÃo de Ãcido lÃtico para cada condiÃÃo estudada, fez-se o ajuste do modelo da isoterma de adsorÃÃo de Langmuir. Estudos sobre a purificaÃÃo em coluna de leito fixo com soluÃÃes monocomponentes, misturas binÃrias e mistura real tambÃm foram realizados. Concluiu-se que a aplicaÃÃo da metodologia proposta para purificaÃÃo do Ãcido lÃtico em coluna de leito fixo mostrou melhores resultados quando a condiÃÃo (temperatura=30ÂC) foi utilizada em ambos os adsorventes. Sendo a resina Amberlite IRA 96, o adsorvente que mostrou melhor eficiÃncia na adsorÃÃo do Ãcido lÃtico.
Jones, Vonda K. (Vonda Kaye). "Methods Development for Simultaneous Determination of Anions and Cations by Ion Chromatography". Thesis, North Texas State University, 1987. https://digital.library.unt.edu/ark:/67531/metadc330724/.
Texto completoBall, James William 1945. "Thermodynamic and isotopic systematics of chromium chemistry". Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/191202.
Texto completoMartin, Bertha Louise. "High pressure liquid chromatography ion exchange studies on bile relating to the postmortem interval". Scholarly Commons, 1987. https://scholarlycommons.pacific.edu/uop_etds/2141.
Texto completoPannell, Daniel K. (Daniel Kirk). "Detector Comparison for Simultaneous Determination of Organic Acids and Inorganic Anions". Thesis, University of North Texas, 1988. https://digital.library.unt.edu/ark:/67531/metadc500456/.
Texto completoKouyoumdjian, Arthur Jean Michel. "The functionalisation and application of microporous micro-capillary films for the chromatographic purification of biomolecules". Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/289020.
Texto completoChokazinga, Davlin. "Coordination studies of inositols with aluminium and related cations". Curtin University of Technology, School of Applied Chemistry, 2003. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=14424.
Texto completoTriaxial sites of the inositols have shown a preference to coordinate small ions with ionic size of at least 60 pin, smaller ions than this displayed very weak interactions. Likewise large ions (90-100 pm) imparted weak interactions on triaxial sites of the inositols. These large ions coordinated well with the axial-equatorial-axial sites of the inositols although it was observed that calcium ions appeared to form a 2:1 ligand:cation complex with cis-inositol at the triaxial site despite being a large cation (100 pm). The detection of complex formation by HPLC showed a possible formation of very stable complexes of epi-inositol complexes with calcium ions. However, a change of refractive index of the solution on sequential addition of the cation may have caused an interference in the results such that direct interpretation was not possible. Ion exchange chromatography provided the quickest guide on how strongly the inositols interact with a particular cation. However, determination of complex stoichiometry and or structure was not possible using this technique.
Mabakane, Elizabeth Nontombi. "The determination of distribution coefficient for some elements on the macroporous cation exchanger Amberlyst 15 using nitric acid – methanol mixtures". Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2329.
Texto completoThe main purpose of this study is to understand the application of ion exchange chromatography on separation of charged ions of elements. Ion exchange chromatography is an analytical method, which is used for the separation of elements, quantitation and qualitation. The use of Amberlyst 15 resin as a source of separation for metal ions has been investigated and studies in various academic disciplines such as chemistry and material science. In this research study, Amberlyst 15 resin was investigated in order to understand the separation of positively charged divalent elements ions (Zn2+, Cu2+, Co2+ and Ni2+). The use of nitric acid and methanol mixture enhanced separation of these metal ions by ensuring that nitric acid is constant and varying methanol concentration. In this study, it was found that the resin has a high affinity for the metal ions at high methanol concentration, hence the distribution coefficient values increase but decreases at low methanol concentrations. The complexities of molecular structure of the salts of the elements provide the more understanding of the metal ion interaction with the resin particle. Furthermore, the role and strength of nitric acid to break the structural bonds and release the metal ions to get sorbed on the resin remains the most essential factor of understanding distribution coefficient values. Method validation parameters such as linearity, precision and accuracy of the method were determined. The method precision and accuracy were determined from the QC samples which is expressed as relative error (%RE) with the total coefficient of variation (%CV’s) were < 20%.
Motalane, Mpempe Paulus. "Analytical determination of fluorides in South African chemical gypsum". Thesis, Access to E-Thesis, 2004. http://upetd.up.ac.za/thesis/available/etd-04302005-100153/.
Texto completoPathange, Lakshmi Prasad. "Characterization of protein microstructure by various chromatographic techniques". Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/26851.
Texto completoPh. D.
Sines, Brian James. "Evaluation of Phenomena that Determine the Performance of Immunoaffinity, Peptide-Based and Ion Exchange Affinity Sorbents". Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/29841.
Texto completoPh. D.
This report presents an evaluation of the design of low-solids content, large-particle diameter beaded cellulose supports for column-mode protein purification. The study presented here optimizes the molecular accessibility of the cellulose support to high molecular weight proteins relative to the mechanical stability of the support at high operating linear velocities by the manipulation of bead particle diameter and solids content. A novel epoxidegradient activation method (epoxy-GAM) is developed for creating a gradient of support activation for support crosslinking and affinity ligand installation in the preparation of DEAE hydrogel matrices. These cellulose hydrogel supports were evaluated with regards to structure, dynamic and static binding capacity, pressure-flow stability, chemical stability and intraparticle transport phenomena. The utility of the low-solids content, large-particle diameter DEAE hydrogel matrices was demonstrated in a column-mode protein purification using albumin and fibrinogen mixtures.
Roman, Henry James. "Ostrich calpastatin purification and partial characterization of the liver inhibitor". Thesis, University of Port Elizabeth, 2000. http://hdl.handle.net/10948/d1015522.
Texto completoPIRES, MARIA A. F. "Aplicacao da cromatografia de ions no controle de materiais de interesse nuclear". reponame:Repositório Institucional do IPEN, 1989. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9918.
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Tese (Doutoramento)
IPEN/T
Instituto de Química - Universidade de São Paulo - IQ/USP
Chen, Xin. "Development of Monolithic Stationary phases for Cation-Exchange Capillary Liquid Chromatography of Peptides and Proteins". BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2467.
Texto completoBruce, Ruey K. "Synthesis and purity characterization of high purtiy 3,3ʹ-disulfonated-4,4ʹ-dichlorodiphenyl sulfone (SDCDPS) monomer by ion chromatography". Columbus, Ohio : Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1243347553.
Texto completoMARQUES, MARIA N. "Cromatografia de ions aplicada na especia‡ao de cromio hexavalente em amostras de interesse ambiental". reponame:Repositório Institucional do IPEN, 1999. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10739.
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Mestrado (Dissertacao)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
Nicolas-Simonnot, Marie-Odile. "Contribution à l'étude de la chromatographie frontale des protéines par échange d'anions : Application à l'albumine du serum bovin bovin". Vandoeuvre-les-Nancy, INPL, 1991. http://docnum.univ-lorraine.fr/public/INPL_T_1991_NICOLAS_SIMONNOT_M_O.pdf.
Texto completoCastiblanco, Adriana P. "Expression and Purification of Engineered Calcium Binding Proteins". Digital Archive @ GSU, 2009. http://digitalarchive.gsu.edu/chemistry_theses/20.
Texto completoGuzmán, Laparra Gabriel Eduardo. "Use of affordable technology for the sensitive and specific diagnosis of onchocerciasis (river blindness) /". Stockholm, 2002. http://diss.kib.ki.se/2002/91-7349-321-x.
Texto completoJones, Ward M. "Purification and characterization of s-adenosylmethionine synthetase from candida albicans". Virtual Press, 1989. http://liblink.bsu.edu/uhtbin/catkey/722458.
Texto completoDepartment of Biology
OLIVEIRA, INEZ C. de. "Recuperacao e purificacao do uranio utilizado em alvos para a producao de Mosup99". reponame:Repositório Institucional do IPEN, 1998. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10688.
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Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
Richardson, Ashley E. "Hydrophilic interaction and micellar liquid chromatography approaches for the separation of aromatic carboxylic acid positional isomers plus ion exchange chromatography for the separation of sulfonated compounds". Miami University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=miami1511295591427557.
Texto completoMonaco, Enzo. "pH Transients in Hydroxyapatite chromatography columns". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.
Buscar texto completoJen, Jen-Fon. "Analysis of Acid Gas Emissions in the Combustion of the Binder Enhanced d-RDF by Ion Chromatography". Thesis, University of North Texas, 1988. https://digital.library.unt.edu/ark:/67531/metadc331848/.
Texto completoSANTOS, ELIANE E. dos. "Estudo da separacao de galio e zinco por meio de resinas trocadoras e de adsorcao de ions. Obtencao de sup67Ga para uso em medicina nuclear". reponame:Repositório Institucional do IPEN, 1995. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10426.
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Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
OLIVEIRA, JOAO E. de. "Influência do hospedeiro (CHO) e da estratégia de cultivo nas estruturas glicídicas e propriedades moleculares da tireotrofina humana". reponame:Repositório Institucional do IPEN, 2007. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11590.
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Tese (Doutoramento)
IPEN/T
Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP
Sousa, Anayla dos Santos. "Estudo dos modos batelada e reciclo externo estacionário para a separação do ácido hialurônico por cromatografia de exclusão por tamanho". [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266865.
Texto completoTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química
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Resumo: O Ácido hialurônico (AH) é um polissacarídeo linear com importantes aplicações na indústria farmacêutica, médica e cosmética, fazendo-se necessária sua purificação por ser oriundo de uma variedade de fontes, animal e não animal. Assim sendo, o presente trabalho discorre sobre a separação do AH produzido por fermentação em meio de cultura sintético, utilizando a técnica cromatográfica de exclusão por tamanho. Determinaram-se as melhores condições de separação utilizando, inicialmente, uma coluna de exclusão por tamanho operando em batelada. Estas condições foram mantidas em todos os ensaios e serviram de modelo para a obtenção dos parâmetros para o escalonamento do processo. Ainda em batelada, avaliou-se a inserção da técnica cromatográfica de troca iônica acoplada à exclusão por tamanho, com o intuito de aprimorar a separação do AH, averiguando resinas de caráter catiônico e aniônico. Realizou-se um estudo comparativo entre o processo em batelada, com e sem a inserção da troca iônica, e o semicontínuo operado com reciclo externo estacionário (REE), visando a obtenção de frações de AH e proteínas com elevado grau de pureza. Considerando-se o processo semicontínuo operado em REE foram avaliados diferentes volumes de reciclo, sendo eles 1,0; 1,5; 2,25 e 3,0 mL. Os resultados obtidos com o processo semicontínuo em REE alcançaram um percentual de purificação entre 92% e 97% para o AH, trabalhando-se com volumes de reciclo de 1,0 a 3,0 mL, enquanto que para as proteínas mostrou-se inviável. A inserção da cromatografia de troca iônica mostrou-se promissora com o uso da resina catiônica, apresentando 98% de pureza com um rendimento de 99% para o AH; ao contrário da resina aniônica que exibiu uma perda mássica de AH em torno de 50%. O escalonamento do processo cromatográfico de exclusão por tamanho mostrou-se possível, apresentando resultados semelhantes à operação em batelada
Abstract: The hyaluronic acid (HA) is a linear polysaccharide with important applications in the pharmaceutical, medical and cosmetics industry. Its purification is necessary because it is in a mixture coming from a variety of sources, animal and non-animal. The aim of this work is the separation of HA obtained by fermentation in synthetic medium, using the technique of size exclusion chromatography. The best conditions for HA separation were determined using, initially, a batch operation size exclusion column. These conditions were maintained in all trials and served to obtain the parameters for the large scale process. The batch operation also evaluated the ion exchange chromatography technique coupled to size exclusion, in order to enhance the separation of HA by examining cationic and anionic resins. A comparative study was carried out between the batch process, with and without the inclusion of ion exchange, and the semi-batch process with steady state recycling (SSR), in order to obtain fractions of HA and proteins with high purity. The semi-batch process operated with SSR assessed in differents volumes of recycle (1.0, 1.5, 2.25 and 3.0 mL). The results obtained with the semi-batch process with SSR achieved a purification percentage between 92 % and 97% for HA, working with recycle volumes from 1.0 to 3.0 mL, showing to be feasible for HA, while for the proteins proved to be unfeasible, with a maximum of 60 % purity. The ion-exchange chromatography obtained good results with the use of cationic resin, with 98% of purity and a yield of 99 % for HA, unlike the anionic resin which exhibited a mass loss of HA around 50 %. The scale-up process for size exclusion chromatography proved to be possible, with similar results to batch operation
Doutorado
Desenvolvimento de Processos Biotecnologicos
Doutor em Engenharia Química
OLIVEIRA, JOAO E. de. "Purificacao de hormonio de crescimento humano recombinante obtido no espaco periplasmico de ESCHERICHIA COLI, visando sua aplicacao clinica". reponame:Repositório Institucional do IPEN, 1999. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10755.
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Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
Van, der Meulen N. P. (Nicolas Philip). "The cyclotron production of selected radionuclides using medium energy protons". Thesis, Stellenbosch : Stellenbosch University, 2008. http://hdl.handle.net/10019.1/21914.
Texto completoENGLISH ABSTRACT: Radiochemical research involving ion exchange chromatography is of paramount importance to the future of radionuclide production at the Radionuclide Production Group (RPG) of iThemba LABS. It is required for the production of high-activity yields of radionuclides to effectively remove impurities and for the safety of the operators performing such productions. The radiochemical separations of some new products from their target material, as well as experiments to determine whether production is viable, are described. 67Ga is currently being produced at the RPG and makes use of zinc targets. With the production of ultra-pure 67Ga, it was necessary to remove any Fe(III) impurities from the final product, such that it may be possible to label peptides with this product. The use of Amberchrom CG161M for this purpose was found to be satisfactory. Interest was shown in 88Y by an overseas company for the manufacture of sources. While a method involving extraction of the radionuclide and the ion exchange thereof using Chelex 100 chelating resin had been published, problems with the production persisted. Three methods, using ion exchange chromatography, were devised to produce the radionuclide, with two of them being adopted for production purposes. Thick-target nuclear data have also recently been accumulated in collaboration with colleagues from ATOMKI, Debrecen, Hungary. There is a large demand for 82Sr for the manufacture of 82Sr/82Rb generators for medical use. A method was developed to manufacture this radionuclide with thicker (32 g) target material, bombarded in the Vertical Beam Target Station (VBTS), and to separate 82Sr from its target material with the use of Purolite S950 chelating resin. 68Ge/68Ga generators are becoming increasingly important in the world of radiopharmaceuticals. A project to develop a local generator was funded by the Innovation Fund and research was performed to produce 68Ge, such that the generator could be manufactured. This involved bombarding thicker Ga targets in the VBTS and performing the chemical separation using AG MP-1 anion exchange resin. The final product was loaded onto generators, although tests performed on different materials to the ones being marketed are also reported in this work. A project was initiated to study the cluster radioactive decay of 223Ac via 14C and 15N emission. To produce 223Ac for these observations, a Th target was bombarded. The 227Pa was separated from the target material using AG MP-1 macroporous anion exchange resin and used as a source, which decayed to 223Ac. The chemical separation and the drying of the final product onto a source plate were completed within approximately 70 minutes from the end of bombardment. The work was performed in collaboration with JINR, Russia, and University of Milan and INFN, Italy. 133Ba has a half-life of over 10 years and is an expensive radionuclide to produce. It has been used in medical and biological studies and there still appears to be a demand for it. A method was devised, utilizing AG50W-X4 cation exchange resin, to separate 133Ba from its CsCl target material. Agricultural specialists in the past have shown an interest in 28Mg, to determine the uptake of the element in fruit. It has long been regarded by some of the local researchers as an interesting project to investigate. It has been determined that the product can be produced in reasonable quantities using LiCl target material, with ten targets being bombarded in series using a 200 MeV proton beam delivered by the Separated Sector Cyclotron. A method, involving the use of Purolite S950 chelating resin, was devised to separate 28Mg from its target material.
AFRIKAANSE OPSOMMING: Radiochemiese navorsing, wat ioonuitruiling chromatografie behels, is van uiterste belang vir die toekoms van die produksie van radionukliede by die Radionukliedproduksiegroep (RPG) van iThemba LABS. Dit is nodig vir die hoë aktiwiteit opbrengs van radionuklied produkte om onsuiwerhede te verwyder en vir die veiligheid van die operateurs wat die produksies moet uitvoer. Die skeiding van nuwe produkte van hulle skyfmateriaal, sowel as eksperimente om vas te stel of ‘n produksie uitvoerbaar is, word in die werk beskryf. 67Ga word tans by RPG vervaardig en maak gebruik van sink as skyfmateriaal. Vir die produksie van “ultra-suiwer” 67Ga was dit belangrik om enige Fe(III) onsuiwerhede uit die finale produk te verwyder om sodoende peptiede merking te kan uitvoer. Die gebruik van Amberchrom CG161M hars was voldoende vir dié eksperiment. ‘n Oorsese maatskappy het belangstelling getoon in 88Y vir die vervaardiging van bronne. Alhoewel ‘n metode wat die ekstraksie van die radionuklied en die ioonuitruiling daarvan met die gebruik van Chelex 100 chelerende hars reeds gepubliseer was, het probleme met die produksie voortgeduur. Drie metodes is opgestel om 88Y te produseer, waarvan twee van die metodes tans gebruik word vir produksie doeleindes. Dik-skyf kerndata is ook versamel in samewerking met kollegas van ATOMKI, Debrecen, Hongarye. Daar is ‘n groot aanvraag vir 82Sr vir die vervaardiging van 82Sr/82Rb generators vir mediese doeleindes. ‘n Metode is ontwikkel om die radionuklied te vervaardig van dikker skyfmateriaal (32 g), in die Vertikale Bundelstasie gebombardeer, en om 82Sr van sy skyfmateriaal te skei met die gebruik van Purolite S950 chelerende hars. 68Ge/68Ga generators is besig om toenemend belangrik te word in die wêreld van radiofarmasie. iThemba LABS kry baie navrae om die produk te vervaardig. Die projek was ook deel van die voorlegging aan die “Innovation Fund” en ‘n manier is ondersoek om 68Ge te vervaardig, wat benodig word om so ‘n generator te laai. Dik Ga skyfmateriaal word in die Vertikale Bundelstasie gebombardeer en ‘n chemiese skeiding is uitgevoer deur gebruik te maak van AG MP-1 anioonuitruiling hars. Die finale produk is op die generators gelaai vir toetsdoeleindes. Toetse is ook op ‘n ander tipe generator uitgevoer en word in die werk beskryf. ‘n Projek is begin om “cluster” radioaktiewe verval van 223Ac, via 14C en 15N emissie, te bestudeer. ‘n Th-skyf is met protone gebombardeer om die 223Ac te produseer vir die eksperiment. 227Pa is vervaardig en geskei van die skyfmateriaal. Dit is gedoen met die gebruik van AG MP-1 makroporeuse anioonuitruiling hars en drooggemaak op ‘n bronplaat, waar dit verval het na 223Ac. Die chemiese skeiding en die droogmaak van die finale produk op ‘n bronplaat is uitgevoer binne 70 minute na Einde van Bombardering (EVB). Die werk is deel van ‘n samewerking met kollegas van JINR, Rusland, en die Universiteit van Milaan, sowel as INFN, Italië. 133Ba het ‘n halveertyd van oor die tien jaar en is ‘n duur produk om te vervaardig. Dit is al gebruik in mediese en biologiese studies en daar is deesdae ‘n redelike aanvraag daarvoor. ‘n Metode is uitgewerk om 133Ba te skei van die CsCl skyfmateriaal met die gebruik van AG50W-X4 katioonuitruiling hars. Spesialiste in landboustudies het in die verlede belangstelling getoon in 28Mg. Dit word gebruik om die absorpsie van dié element in vrugte te ondersoek. Die produk kan vervaardig word met die gebruik van LiCl skyfmateriaal: tot soveel as tien skywe (agter mekaar) word gebombardeer met ‘n 200 MeV protonbundel te iThemba LABS. ‘n Metode, wat Purolite S950 behels, is daargestel om 28Mg van die skyfmateriaal te skei.
Dias, Jailson Cardoso. "Determinação de acetato, nitrato, ferro(II), ferro(III) e cobre em etanol combustivel por cromatografia de ions". [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/248380.
Texto completoTese (doutorado) - Universidade Estadual de Campinas, Instituto de Quimica
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Resumo: O contexto geral deste trabalho se insere na área de desenvolvimento de métodos analíticos para a separação cromatográfica e detecção de íons em biocombustíveis. Diversos procedimentos de otimização (uni e multivariada) foram executados inicialmente visando estabelecer as melhores condições para uma separação eficiente e seletiva dos diferentes analitos. Posteriormente, os principais parâmetros analíticos foram investigados a fim de avaliar o desempenho e a aplicabilidade de cada método pré-estabelecido. Ao todo, três metodologias foram otimizadas, validadas e aplicadas para a análise de bioetanol, sendo a primeira para a determinação dos íons acetato e nitrato e as demais para a determinação dos íons ferro(II), ferro(III) e cobre (sistemas de eluição a base dos ácidos dipicolínico e quelidâmico). As técnicas de cromatografia líquida por troca iônica com detecção condutimétrica (CLTI-DC) e cromatografia líquida por quelação de íons com detecção fotométrica (CLQI-DF) foram utilizadas para os compostos aniônicos e os íons metálicos, respectivamente. De maneira geral, os resultados obtidos evidenciaram o desempenho analítico satisfatório para os três métodos desenvolvidos. Com exceção do ferro(II), todos os demais analitos apresentaram baixos níveis de detectabilidade, da ordem de mg L. Finalmente, diversas amostras de álcool etílico hidratado combustivel (AEHC) foram analisadas diretamente, sem a necessidade de pré-tratamento, para demonstrar a aplicabilidade de cada método
Abstract: The overall context of this work is in the area of development of analytical methods for the chromatographic separation and detection of ions in biofuels. Several optimization procedures (uni- and multivariate) were performed initially in order to establish the best conditions for an efficient and selective separation of different analytes. Subsequently, the main analytical parameters were investigated to assess the performance and applicability of each method. In all, three methods were optimized, validated and applied to the analysis of fuel ethanol, the first being for the determination of nitrate and acetate and the others for the determination of iron(II), iron(III) and copper (eluents based on dipicolinic and chelidamic acids). The techniques of high performance ion-exchange chromatography with conductivity detection (HPIEC-CD) and high performance chelation ion chromatography with photometric detection (HPCIC-PD) were used for the anionic compounds and metal ions, respectively. Overall, the results showed good analytical performance for the three methods developed. With the exception of the iron(II), all other analytes were detected at mg L levels. Finally, several samples of hydrated fuel ethanol were analyzed with no pretreatment to demonstrate the applicability of each method
Doutorado
Quimica Analitica
Doutor em Ciências
Oliveira, Thais de. "Recuperação e reciclagem dos ácidos nítrico e sulfúrico e do Molibdênio dos resíduos líquidos das indústrias de lâmpadas". Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-26092011-150525/.
Texto completoThe waste treatment of certain industrial processes is becoming more important, either by the economic impact of simple disposal in the environment, or by the economic value of materials and substances that can eventually be recovered and recycled. The rapid depletion of mineral reserves and increasing primary energy demand are problems that deserve special attention. In this context, the recovery of metals present in waste of some manufacturing processes assumes a great importance. The recovery of molybdenum present in nitro-sulfur solutions in the form of liquid waste in the manufacturing process of incandescent and fluorescent lamps, is no exception with regard to the importance of recycling. The tailing from the dissolution of the molybdenum mandrel wires used in the conformation of the tungsten filament of electric lamps, has values that can be recovered and recycled to the process itself. Is the case of sulfuric and nitric acids. Molybdenum, present in concentrations around 40 to 90 g.L-1, can be recovered and used in the manufacture of special stainless steel, pigments, lubricants, fertilizer, etc.. In this work two processes for the recovery of this waste were proposed. At the first one, the waste is diluted and molybdenum is recovered by ion-exchange chromatography. The effluent acid from this process was distilled to extract water used in the dilution step. In the second case, the waste goes through a distillation while the molybdenum is precipitated. In both cases, the acids are recovered back to the lamp factory for the dissolution of the molybdenum mandrel wires and molybdenum finds other different applications, as well as having significant value in the market.
CAMARGO, IARA M. C. de. "Determinacao da concentracao dos isotopos naturais de uranio e torio em amostras de agua". reponame:Repositório Institucional do IPEN, 1994. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10405.
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Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP