8 research outputs found

    Enhancing the sugars production yield by supporting H3PW12O40 heteropoly acid on activated carbon for use as catalyst in hydrolysis of cellulose

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    In this work, two catalysts were produced to be used in hydrolysis of cellulose reactions to obtain glucose, araw material used in the production of bioethanol. The heteropoly acid, H3PW12O40 (HPW), reported asstrong and thermally stable acid, was supported on activated carbon (AC) in a ratio varying from 1:1 to 2:1 toproduce the catalysts AC-HPW (1:1) and AC-HPW (2:1). The catalysts were tested in cellulose hydrolysisevaluating some reaction variables and the results show the remarkable dependence of reaction temperature,amount and acidity of the catalyst. The results indicate the advantage of supporting HPW on carbonaceousmaterial for using as catalyst in hydrolysis of cellulose, showing better conversion rate into sugars comparingwith unsupported HPW.Keywords: heteropoly acid; activated carbon support; hydrolysis of cellulose

    Hydrolysis of cellulose using heteropoly salts derivatives from H3PW12O40 with different redox properties as catalysts

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    Heteropoly salts containing different numbers of vanadium atoms (K4[PVW11O40] - KPWV1 andK6[PV3W9O40] - KPWV3) were synthesized from the heteropoly acid H3PW12O40 (HPW), and used as catalystsin hydrolysis of cellulose reactions in order to change the redox properties and verify whether the clusterof catalysts are involved in mechanism reaction. The hydrolysis reactions following a full 23 factorialdesign with the variables: mass ratio (catalyst/substrate), reaction time and temperature. The variables evaluatedwere significant at a 90% confidence level including second and third order interactions. According tothe conducted experiments, the catalysts were all active in hydrolysis. The best results occurred when HPWwas used suggesting that the redox properties did not have much influence in depolymerization of celluloseand the hydrolysis mechanism are assigned to acidic properties of the medium. The main products obtainedfrom the reactions were glucose and HMF, which are products of great interest in the chemical industry

    ContribuiçÔes do enfermeiro para a promoção do aleitamento materno/ Contributions of the nurse for the promotion of breastfeeding

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    O aleitamento materno Ă© o meio mais eficaz para garantir o crescimento saudĂĄvel do bebĂȘ, sendo fundamental para a saĂșde do binĂŽmio mĂŁe e filho. O presente estudo foi realizado com o objetivo de evidenciar a atuação do Enfermeiro em açÔes educativas, para promoção ao aleitamento materno, e os benefĂ­cios desta prĂĄtica efetiva, elucidando as dificuldades encontradas pelas mĂŁes durante a lactação, bem como descrever os riscos inerentes, desencadeados pelo desmame precoce para o binĂŽmio mĂŁe e filho. Trata-se de uma revisĂŁo integrativa, adotando os descritores aleitamento materno, saĂșde materno-infantil, cuidados de enfermagem. As buscas ocorreram nas bases de dados na Biblioteca Virtual em SaĂșde (BVS), Scientific Electronic Library (SciELO), e PubMed com seleção entre 2013 a 2018, artigos completos, gratuitos, em portuguĂȘs e inglĂȘs. Como resultado, foram selecionados vinte e quatro artigos que atenderam aos critĂ©rios de inclusĂŁo. Nas pesquisas foram evidenciadas as altas taxas de desmame precoce, visto que muitas mĂŁes deixam de amamentar exclusivamente atĂ© os seis meses de vida, a prematuridade do recĂ©m-nascido, a ansiedade, medo e insegurança das nutrizes contribuĂ­ram para este fator. Verificou-se a necessidade das açÔes do enfermeiro em apoiar as nutrizes e estimular o aleitamento materno junto com o apoio dos pais e familiares. Conclui-se que a prĂĄtica de amamentar deve ser um ato de prazer e dedicação garantindo os benefĂ­cios oriundos desta prĂĄtica para mĂŁe e filho, onde o enfermeiro deverĂĄ estimular a amamentação e oferecer apoio emocional frente Ă s dificuldades que podem surgir

    AtualizaçÔes na abordagem terapĂȘutica da hemorragia digestiva alta (HDA): uma revisĂŁo integrativa

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    A hemorragia digestiva alta (HDA) ainda Ă© uma das principais emergĂȘncias cirĂșrgicas, com elevada taxa de mortalidade mesmo em paĂ­ses desenvolvidos. As ocorrĂȘncias por HDA nĂŁo varicosa estĂŁo associadas a mortalidade que varia entre 4% e 10%, enquanto que os casos de origem varicosa apresentam atĂ© 30% de mortalidade mesmo com os avanços diagnĂłsticos e terapĂȘuticos na ĂĄrea. O presente estudo de revisĂŁo buscou avaliar novos avanços e atualizaçÔes na abordagem terapĂȘutica da hemorragia digestiva alta, documentados por meio de estudos clĂ­nicos e randomizados. Trata-se de uma pesquisa de revisĂŁo integrativa realizada por meio da base de dados PubMed, que levou em consideração os seguintes critĂ©rios de inclusĂŁo: ensaios clĂ­nicos e testes controlados e aleatĂłrios; artigos publicados nos Ășltimos trĂȘs anos; que possuĂ­am texto completo disponĂ­vel e que abordassem acerca da terapĂȘutica da hemorragia digestiva alta. Ficou constatado que a endoscopia precoce para HDA aguda em pacientes com SCA recente demonstrou ser um procedimento eficiente e seguro para controle de hemorragia com menor necessidade de transfusĂŁo de sangue. AlĂ©m disso, o sistema over-the-scope (OTSC) reduziu significativamente as taxas de ressangramento, complicaçÔes graves e transfusĂ”es de hemĂĄcias pĂłs-randomização. Outra medida adotada Ă© a estratĂ©gia de transfusĂŁo restritiva, a qual demonstrou ser uma estratĂ©gia tĂŁo segura e eficaz quanto a transfusĂŁo liberal em tais pacientes. Por fim, o ĂĄcido tranexĂąmico nĂŁo possui evidĂȘncias na redução das mortes por sangramento gastrointestinal e ainda foi associado a um risco aumentado de eventos tromboembĂłlicos venosos e convulsĂ”es

    NĂșcleos de Ensino da Unesp: artigos 2008

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    Conselho Nacional de Desenvolvimento CientĂ­fico e TecnolĂłgico (CNPq

    NĂșcleos de Ensino da Unesp: artigos 2009

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    WAO International Scientific Conference (WISC 2016) Abstracts

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    Evaluation of a quality improvement intervention to reduce anastomotic leak following right colectomy (EAGLE): pragmatic, batched stepped-wedge, cluster-randomized trial in 64 countries

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    Background Anastomotic leak affects 8 per cent of patients after right colectomy with a 10-fold increased risk of postoperative death. The EAGLE study aimed to develop and test whether an international, standardized quality improvement intervention could reduce anastomotic leaks. Methods The internationally intended protocol, iteratively co-developed by a multistage Delphi process, comprised an online educational module introducing risk stratification, an intraoperative checklist, and harmonized surgical techniques. Clusters (hospital teams) were randomized to one of three arms with varied sequences of intervention/data collection by a derived stepped-wedge batch design (at least 18 hospital teams per batch). Patients were blinded to the study allocation. Low- and middle-income country enrolment was encouraged. The primary outcome (assessed by intention to treat) was anastomotic leak rate, and subgroup analyses by module completion (at least 80 per cent of surgeons, high engagement; less than 50 per cent, low engagement) were preplanned. Results A total 355 hospital teams registered, with 332 from 64 countries (39.2 per cent low and middle income) included in the final analysis. The online modules were completed by half of the surgeons (2143 of 4411). The primary analysis included 3039 of the 3268 patients recruited (206 patients had no anastomosis and 23 were lost to follow-up), with anastomotic leaks arising before and after the intervention in 10.1 and 9.6 per cent respectively (adjusted OR 0.87, 95 per cent c.i. 0.59 to 1.30; P = 0.498). The proportion of surgeons completing the educational modules was an influence: the leak rate decreased from 12.2 per cent (61 of 500) before intervention to 5.1 per cent (24 of 473) after intervention in high-engagement centres (adjusted OR 0.36, 0.20 to 0.64; P < 0.001), but this was not observed in low-engagement hospitals (8.3 per cent (59 of 714) and 13.8 per cent (61 of 443) respectively; adjusted OR 2.09, 1.31 to 3.31). Conclusion Completion of globally available digital training by engaged teams can alter anastomotic leak rates. Registration number: NCT04270721 (http://www.clinicaltrials.gov)
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