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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Biotechnology of chiral sulfoxyphospholipid production : a feasibility study /

Hodgson, Derek J. January 1900 (has links)
Thesis (M.Sc.) - Carleton University, 2002. / Includes bibliographical references (p. 92-95). Also available in electronic format on the Internet.
12

Electron paramagnetic resonance studies of Rhodobacter capsulatus dimethylsulfoxide reductase, model Mo(V) and W(V) complexes and metallotolyporphyrins /

Lane, Ian. January 2004 (has links) (PDF)
Thesis (Ph.D.) - University of Queensland, 2004. / Includes bibliographical references.
13

Dimetilsulfóxidos como ligantes ancilares em complexos de rutênio: catalisadores duais para a combinação da ROMP de norborneno e ATRP de metacrilato de metila / Dimethyl sulfoxide as ancillary ligands of ruthenium complexes: dual catalysts for the combination of ROMP of norbornene and ATRPof methyl methacrylate

Borim, Patricia [UNESP] 23 February 2016 (has links)
Submitted by PATRICIA BORIM Borim (borim.patricia@gmail.com) on 2016-03-08T17:20:29Z No. of bitstreams: 1 Dissertação Final - Patricia Borim 23.02.pdf: 2290317 bytes, checksum: 7f7a4c24b72b475628d2c6c665f408e7 (MD5) / Rejected by Ana Paula Grisoto (grisotoana@reitoria.unesp.br), reason: Solicitamos que realize uma nova submissão seguindo as orientações abaixo: No campo “Versão a ser disponibilizada online imediatamente” foi informado que seria disponibilizado o texto completo porém no campo “Data para a disponibilização do texto completo” foi informado que o texto completo deverá ser disponibilizado apenas 6 meses após a defesa. Caso opte pela disponibilização do texto completo apenas 6 meses após a defesa selecione no campo “Versão a ser disponibilizada online imediatamente” a opção “Texto parcial”. Esta opção é utilizada caso você tenha planos de publicar seu trabalho em periódicos científicos ou em formato de livro, por exemplo e fará com que apenas as páginas pré-textuais, introdução, considerações e referências sejam disponibilizadas. Se optar por disponibilizar o texto completo de seu trabalho imediatamente selecione no campo “Data para a disponibilização do texto completo” a opção “Não se aplica (texto completo)”. Isso fará com que seu trabalho seja disponibilizado na íntegra no Repositório Institucional UNESP. Por favor, corrija esta informação realizando uma nova submissão. Agradecemos a compreensão. on 2016-03-09T17:20:50Z (GMT) / Submitted by PATRICIA BORIM Borim (borim.patricia@gmail.com) on 2016-03-14T22:35:01Z No. of bitstreams: 1 Dissertação Final - Patricia Borim 23.02.pdf: 2290317 bytes, checksum: 7f7a4c24b72b475628d2c6c665f408e7 (MD5) / Approved for entry into archive by Ana Paula Grisoto (grisotoana@reitoria.unesp.br) on 2016-03-15T13:43:13Z (GMT) No. of bitstreams: 1 borim_p_me_sjrp.pdf: 2290317 bytes, checksum: 7f7a4c24b72b475628d2c6c665f408e7 (MD5) / Made available in DSpace on 2016-03-15T13:43:13Z (GMT). No. of bitstreams: 1 borim_p_me_sjrp.pdf: 2290317 bytes, checksum: 7f7a4c24b72b475628d2c6c665f408e7 (MD5) Previous issue date: 2016-02-23 / Os complexos [RuCl2(S-dmso)3(O-dmso)] (complexo 1) e [RuCl2(PPh3)(S-dmso)2] (complexo 2) foram sintetizados e caracterizados por RMN, FTIR, voltametria cíclica e análise elementar. A atividade catalítica dos complexos 1 e 2 foi investigada na polimerização por abertura de anel via metátese (ROMP) de norborneno (NBE) e na polimerização radicalar por transferência de átomo (ATRP) de metacrilato de metila (MMA). As sínteses de polinorborneno (poliNBE) via ROMP com [RuCl2(PPh3)(S-dmso)2] como pré-catalisador foram avaliadas sob diferentes condições de reação ([EDA]/[Ru], [NBE]/[Ru], temperatura e tempo de reação). Os melhores rendimentos de poliNBE foram obtidos a 50 °C durante 120 minutos com razão molar [NBE]/[Ru] = 5000, na presença de 5 µL de EDA. A polimerização de MMA via ATRP foi conduzida independentemente usando os complexos 1 ou 2. Os testes catalíticos na ATRP de MMA foram avaliados em função das razões molares [EBiB]/[Ru] e [MMA]/[Ru] e do tempo de reação. Todos os experimentos via ATRP foram conduzidos à 85 °C. As polimerizações realizadas com 2 mostraram que as massas moleculares aumentaram linearmente com a conversão. As massas moleculares obtidas no estudo cinético com 1 também aumentaram com a conversão, mas foram maiores do que as massas moleculares teóricas. Este comportamento pode ser explicado pelo processo redox reversível de 2, como confirmado por voltametria cíclica. O complexo [RuCl2(PPh3)(S-dmso)2] (2) demonstrou menor atividade catalítica do que o complexo [RuCl2(S-dmso)3(O-dmso)] (1), o qual é consistente com o melhor controle na polimerização. / The [RuCl2(S-dmso)3(O-dmso)] (1) and [RuCl2(PPh3)(S-dmso)2] (2) complexes were synthesized and characterized by NMR, FTIR, cyclic voltammetry and elementary analysis. Their catalytic activity was investigated in the ring-opening metathesis polymerization (ROMP) of norbornene (NBE) and in the atom transfer radical polymerization (ATRP) of methyl methacrylate (MMA). Syntheses of polynorbornene (polyNBE) via ROMP with 2 as precatalyst were evaluated under different reaction conditions ([EDA]/[Ru], [NBE]/[Ru], temperature and reaction time; EDA is ethyldiazoacetate). PolyNBE yields were dependent on the EDA volume, monomer concentration, temperature and reaction time. The best yields of polyNBE were obtained at 50 °C for 120 min with [NBE]/[Ru] = 5000 in presence of 5 µL of EDA. MMA polymerization via ATRP was conducted independently using the complexes 1 and 2 as catalysts as a function of time and initiator and monomer concentration. The kinetic data for polymerizations carried out with 2 show that molecular weights increase linearly with conversion. The molecular weights obtained in the kinetic study with 1 also increase with conversion but show a marked deviation above the theoretical molecular weights. This behavior was explained by the reversible redox process of 2 as confirmed by cyclic voltammetry. The complex [RuCl2(S-dmso)2(PPh3)] (2) promotes the polymerization with a rate of polymerization slower than that obtained using the complex [RuCl2(S-dmso)3(O-dmso)] (1); it is consistent with the better control in the polymerization.
14

Avaliação da taxa de filtração glomerular e excreção fracionada de eletrólitos de cães com doença renal crônica tratados com dimetilsulfóxido (DMSO)

Crivelenti, Leandro Zuccolotto [UNESP] 24 February 2011 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:23:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-02-24Bitstream added on 2014-06-13T18:19:59Z : No. of bitstreams: 1 crivelenti_lz_me_jabo.pdf: 1024671 bytes, checksum: 41f7ae2340e1dfe3960e54cfba80f4a7 (MD5) / Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / O objetivo do presente trabalho foi avaliar os efeitos do tratamento com DMSO sobre alguns aspectos da função renal, do perfil bioquímico sérico, de parâmetros hematológicos e da condição clínica de cães sadios e de cães com doença renal crônica (DRC). As avaliações foram feitas antes, durante e após a administração de DMSO a 10% na dose de 0,5g/kg, cada 24h, por três dias. Os resultados mostraram que apesar de não ter havido alterações significativas da maioria dos parâmetros analisados, houve diminuição da ingestão de água e ração no grupo de cães sadios durante as primeiras 24 horas pós-tratamento. No grupo DRC, embora tenha havido tendência de diminuição dos valores de hemácias e hematócrito, relacionada ao fator tratamento, o processo foi reversível. O DMSO resultou em alguns efeitos adversos nos cães sadios e também nos cães com DRC, nos quais os efeitos foram mais frequentes e mais graves. A gravidade dos efeitos adversos relacionados ao tratamento com DMSO e possível associação com o óbito em cães com DRC em estágio 4, constituem fatores para contraindicação do fármaco. Considerando que o DMSO pode ser indicado para diversas modalidades terapêuticas, os resultados do presente estudo permitem concluir que no que se refere à função renal, tanto para cães sadios quanto para cães com DRC em estágios 2 e 3, não há contraindicações para o uso do fármaco. O DMSO pode resultar em modificações leves das funções relacionadas aos glomérulos e aos túbulos, mesmo em cães com DRC, que, sabidamente, são limitados quanto à expectativa de melhora da função renal, fato que merece investigação, principalmente em pacientes que já possam estar se beneficiando de tratamento médico de manutenção para a insuficiência renal crônica / The objective of this study was to evaluate the effects of DMSO treatment on some aspects of renal function, serum profile, total blood count parameters and clinical condition of health or chronic kidney disease (CKD) dogs. The evaluations were done before, during and after the administration of DMSO 10% at a dose of 0.5g/kg, each 24h, for three days. The results showed that, although there were no significant changes in the majority of the analyzed parameters, there was decrease of the water and food intake in the health dogs group during the first 24 hours post-treatment. In the CKD group, although there was a tendency toward lower values of red blood cell count and hematocrit, related to the treatment, the process was reversible. DMSO resulted in some adverse effects in both healthy and CKD dogs, however the effects were more frequent and worse in CKD dogs. The severity of adverse effects related to the DMSO and its possible association with death in stage 4 CKD dogs, are contraindications for the drug. Considering that DMSO can be indicated for a variety of therapeutic modalities, the results of this study showed that concerning to the renal function, for both healthy and stages 2 or 3 CKD dogs, there are no contraindications for the drug usage. DMSO can result in some modifications on the functions related to glomeruli and tubules, even in CKD dogs, which are known to be limited on the expectation of renal function improvement, a fact that deserves investigation, especially in patients who are already being benefited from maintenance treatment for chronic renal failure
15

Avaliação da taxa de filtração glomerular e excreção fracionada de eletrólitos de cães com doença renal crônica tratados com dimetilsulfóxido (DMSO) /

Crivelenti, Leandro Zuccolotto. January 2011 (has links)
Orientador: Marileda Bonafim Carvalho / Banca: Márcia Mery Kogika / Banca: Áureo Evangelista Santana / Resumo: O objetivo do presente trabalho foi avaliar os efeitos do tratamento com DMSO sobre alguns aspectos da função renal, do perfil bioquímico sérico, de parâmetros hematológicos e da condição clínica de cães sadios e de cães com doença renal crônica (DRC). As avaliações foram feitas antes, durante e após a administração de DMSO a 10% na dose de 0,5g/kg, cada 24h, por três dias. Os resultados mostraram que apesar de não ter havido alterações significativas da maioria dos parâmetros analisados, houve diminuição da ingestão de água e ração no grupo de cães sadios durante as primeiras 24 horas pós-tratamento. No grupo DRC, embora tenha havido tendência de diminuição dos valores de hemácias e hematócrito, relacionada ao fator tratamento, o processo foi reversível. O DMSO resultou em alguns efeitos adversos nos cães sadios e também nos cães com DRC, nos quais os efeitos foram mais frequentes e mais graves. A gravidade dos efeitos adversos relacionados ao tratamento com DMSO e possível associação com o óbito em cães com DRC em estágio 4, constituem fatores para contraindicação do fármaco. Considerando que o DMSO pode ser indicado para diversas modalidades terapêuticas, os resultados do presente estudo permitem concluir que no que se refere à função renal, tanto para cães sadios quanto para cães com DRC em estágios 2 e 3, não há contraindicações para o uso do fármaco. O DMSO pode resultar em modificações leves das funções relacionadas aos glomérulos e aos túbulos, mesmo em cães com DRC, que, sabidamente, são limitados quanto à expectativa de melhora da função renal, fato que merece investigação, principalmente em pacientes que já possam estar se beneficiando de tratamento médico de manutenção para a insuficiência renal crônica / Abstract: The objective of this study was to evaluate the effects of DMSO treatment on some aspects of renal function, serum profile, total blood count parameters and clinical condition of health or chronic kidney disease (CKD) dogs. The evaluations were done before, during and after the administration of DMSO 10% at a dose of 0.5g/kg, each 24h, for three days. The results showed that, although there were no significant changes in the majority of the analyzed parameters, there was decrease of the water and food intake in the health dogs group during the first 24 hours post-treatment. In the CKD group, although there was a tendency toward lower values of red blood cell count and hematocrit, related to the treatment, the process was reversible. DMSO resulted in some adverse effects in both healthy and CKD dogs, however the effects were more frequent and worse in CKD dogs. The severity of adverse effects related to the DMSO and its possible association with death in stage 4 CKD dogs, are contraindications for the drug. Considering that DMSO can be indicated for a variety of therapeutic modalities, the results of this study showed that concerning to the renal function, for both healthy and stages 2 or 3 CKD dogs, there are no contraindications for the drug usage. DMSO can result in some modifications on the functions related to glomeruli and tubules, even in CKD dogs, which are known to be limited on the expectation of renal function improvement, a fact that deserves investigation, especially in patients who are already being benefited from maintenance treatment for chronic renal failure / Mestre
16

Synthesis of DMSO based silver nanoparticles for application in wound healing

Nqakala, Zimkhitha Biancah January 2021 (has links)
>Magister Scientiae - MSc / Silver nanoparticles (AgNPs) apart from being chemically significant, have shown a lot of health benefits, the most studied being their anti-bacterial and anti-inflammatory properties. These biological properties can be further enhanced by adding compounds with known medical properties giving rise to even more desired potent materials. Anti-bacterial and cytotoxicity studies show that these AgNPs can kill bacteria, prevent infections and regenerate skin cells. On the other hand, previous studies have reported dimethyl sulfoxide (DMSO) with attractive wound healing abilities specifically cell growth promotion. It was then envisaged that the combination of DMSO and AgNPs could lead to a potent wound healing agent. It is a well-known fact that non-healing wounds pose a socioeconomic threat to a large population worldwide. / 2023
17

Molecular mechanism of the synergistic effects of vitrification solutions on the stability of phospholipid bilayers

Hughes, Zak, Mancera, R.L. 13 March 2019 (has links)
No / The vitrification solutions used in the cryopreservation of biological samples aim to minimize the deleterious formation of ice by dehydrating cells and promoting the formation of the glassy state of water. They contain a mixture of different cryoprotective agents (CPAs) in water, typically polyhydroxylated alcohols and/or dimethyl sulfoxide (DMSO), which can damage cell membranes. Molecular dynamics simulations have been used to investigate the behavior of pure DPPC, pure DOPC, and mixed DOPC-β-sitosterol bilayers solvated in a vitrification solution containing glycerol, ethylene glycol, and DMSO at concentrations that approximate the widely used plant vitrification solution 2. As in the case of solutions containing a single CPA, the vitrification solution causes the bilayer to thin and become disordered, and pores form in the case of some bilayers. Importantly, the degree of thinning is, however, substantially reduced compared to solutions of DMSO containing the same total CPA concentration. The reduction in the damage done to the bilayers is a result of the ability of the polyhydroxylated species (especially glycerol) to form hydrogen bonds to the lipid and sterol molecules of the bilayer. A decrease in the amount of DMSO in the vitrification solution with a corresponding increase in the amount of glycerol or ethylene glycol diminishes further its damaging effect due to increased hydrogen bonding of the polyol species to the bilayer headgroups. These findings rationalize, to our knowledge for the first time, the synergistic effects of combining different CPAs, and form the basis for the optimization of vitrification solutions. / Australian Research Council linkage grant No. LP0884027; Alcoa Australia Ltd.; BHP Billiton Worsley Alumina Pty. Ltd.
18

Dimethyl sulfoxide (DMSO), activated sludge volume loading and correlation of dimethyl sulfide (DMS) conversion rate

Hsu, Han-yu 07 September 2012 (has links)
Abstract DMSO (dimethyl sulfoxide) has merits of a high boiling point and high solution power to most photo-resistant materials used in semiconductor and LCD (liquid crystal displayers) industries. Wastewaters originated from the industries contain hundreds of grams of DMSO per cubic mater. DMSO is easily decomposed to DMS (dimethyl sulfide) and DMSO2 (dimethyl sulfone) by microorganisms in biological reactors. Malodorous DMS has a relatively low water solubility and can easily emit into the atmosphere thus causes nuisance problems. The fraction of conversion of DMSO to DMS is possibly related to the volumetric DMSO loading (F/V) to an aerobic wastewater treatment pond. This study aimed to investigate the volumetric DMSO loading which minimize the DMS production. Sequencing batch reaction tests indicate that with F/V of less than 0.45 kg DMSO-S/m3.day, there was no DMS detected in the treating mixed liquor and the vented gas from the liquor. It was also observed that with sulfate-S of higher than 0.55 kg/m3 in the mixed liquor which corresponded to F/V of 0.55 kg DMSO-S/m3.day, a high conversion of DMSO to DMS resulted in the system failure.
19

Reactions of cellulose in the dimethyl sulfoxide/paraformaldehyde (DMSO/PF) solvent

Nicholson, Myron Donal, January 1976 (has links) (PDF)
Thesis (Ph. D.)--Institute of Paper Chemistry, 1976. / Includes bibliographical references (p. 80-83).
20

Designing and investigating molecular bistability in ruthenium dimethylsulfoxide complexes /

Rachford, Aaron A. January 2007 (has links)
Thesis (Ph.D.)--Ohio University, June, 2007. / Includes bibliographical references (leaves 186-191)

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