Gpc
Mostrando 13-24 de 279 artigos, teses e dissertações.
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13. Exopolysaccharide production from Bacillus velezensis KY471306 using statistical experimental design
Abstract Exopolysaccharide (EPS) biopolymers produced by microorganisms play a crucial role in the environment such as health and bio-nanotechnology sectors, gelling agents in food and cosmetic industries in addition to bio-flocculants in the environmental sector as they are degradable, nontoxic. This study focuses on the improvement of EPS production throug
Braz. J. Microbiol.. Publicado em: 2018-09
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14. Adenanthera pavonina GALACTOMANNAN FOR CONTROLLED DELIVERY OF RUTIN - A PRELIMINARY STUDY
Improving the development of modified release matrix systems strictly depends on selecting an appropriate agent capable of controlling the drug's release. In this study, Adenanthera pavonina galactomannan was investigated as a potential basis for developing a controlled release of rutin. This galactomannan was extracted, purified and characterized by GPC, NM
Quím. Nova. Publicado em: 2018-06
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15. Is it possible to perform bacterial identification and antimicrobial susceptibility testing with a positive blood culture bottle for quick diagnosis of bloodstream infections?
Abstract INTRODUCTION: Bloodstream infections can be fatal, and timely identification of the etiologic agent is important for treatment. METHODOLOGY: An alternative method, consisting of direct identification and susceptibility testing of blood culture bottles using the automated VITEK 2® system, was assessed. RESULTS: All 37 of the Gram-negative bacill
Rev. Soc. Bras. Med. Trop.. Publicado em: 2018-04
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16. Effect of solvents on the morphology of PMMA films fabricated by spin-coating
Abstract A method to produce thin layer of PMMA (poly (methyl methacrylate) films by spin coating is reported. PMMA is dissolved in xylene, a mixture of MIBK-xylene and chloroform. Varying the PMMA concentration and spin-coating speeds controls the thickness of the PMMA films. Using chloroform as solvent evidenced thickness around 10 μm. This thickness is s
Polímeros. Publicado em: 21/09/2017
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17. MODIFICAÇÃO QUÍMICA DA PECTINA DO MELÃO CAIPIRA (Cucumis melo VAR. ACIDULUS)
Melon is one of the most widely consumed fruits in the world. In Brazil, 60% of the production is for domestic consumption, with these fruits deemed to be of lower commercial value. For the first time, pectin has been extracted from this species of melon. So the extraction of this polysaccharide can be used as an alternative to increase the value of the frui
Quím. Nova. Publicado em: 2017-06
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18. Novos surfactantes alquil poliglicosídicos à base de amilose extraída da batata inglesa (Solanum tuberosum L.)
Alkyl polyglycosides (APGs) are new biodegradable surfactants, non-toxic, synthesized from abundant renewable sources, potentially more appropriate than anionic surfactants. A range of glycosides denoted APG-Cy was synthesized by the Köenig-Knorr reaction using C10, C16 and C18 alcohols and derived from the degradation of amylose from English potato. The mo
Quím. Nova. Publicado em: 2017-04
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19. AN ALTERNATIVE ROUTE TO PRODUCE STANDARDS FOR GEL PERMEATION CHROMATOGRAPHY USING NITROXIDE MEDIATED POLYMERIZATION
Abstract All over the world standards for Gel Permeation Chromatography (GPC) are produced using ionic polymerization. Standards are commercialized in a broad range of molecular weight and their dispersity (Ð) must be lower than 1.1. This work proposes the synthesis of polystyrene standards using Nitroxide Mediated Polymerization (NMP), an alternative techn
Braz. J. Chem. Eng.. Publicado em: 2017-01
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20. Waterborne hyperbranched alkyd-acrylic resin obtained by miniemulsion polymerization
Abstract Four waterborne hyperbranched alkyd-acrylic resins (HBRAA) were synthesized by miniemulsion polymerization from a hyperbranched alkyd resin (HBR), methyl methacrylate (MMA), butyl acrylate (BA) and acrylic acid (AA), by using benzoyl peroxide (BPO) and ammonium persulfate (AP) as initiators. The reaction between HBR and acrylic monomers was evidence
Polímeros. Publicado em: 08/12/2016
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21. Efeitos de proteína, amino ácido e balanço alimentar eletrolítico no desempenho de aves de corte e parâmetro sanguíneos sob estresse calórico
RESUMO O efeito de proteína bruta (PB), amino ácido (AA) e balanço alimentar eletrolítico (DAE) foi avaliado por parâmetros sanguíneos, características da carcaça e desempenho de aves de corte sob estresse calórico (29-34°C). Quinhentos e quarenta machos (Ross 308) foram alocados em 12 regimes alimentares num arranjo fatorial 2 × 2 × 3 totalmente
Acta Sci., Anim. Sci.. Publicado em: 2016-09
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22. Investigations on Preparation and Characterization of Certain Copolyesters
In this paper, we report on the synthesis and characterization of high molecular weight copolyesters from Terephthalic acid, 1, 4 butane diol and Succinic acid /Sebacic acid through a two step process of melt polycondensation using titanium tetra butoxide as catalyst. The synthesized aromatic-aliphatic random copolyesters were characterized by means of FTIR,
Mat. Res.. Publicado em: 26/02/2016
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23. Preparation and Characterization of Maleic Anhydride Grafted Poly(Hydroxybutirate-CO-Hydroxyvalerate) – PHBV-g-MA
A compatibilizer agent was successfully produced by grafting maleic anhydride (MA) to poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) chains on a reactive processing by mechanical mixing, using a mixture of PHBV, MA and dicumyl peroxide (DCP) as initiator. The resulting PHBV grafted MA (PHBV-g-MA) was characterized by Fourier transform infrared (FTIR) spectr
Mat. Res.. Publicado em: 12/02/2016
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24. Síntese e caracterização de novos copolímeros fosforilados
Resumo O rápido desenvolvimento da química de polímeros nos últimos anos tem acompanhado a introdução dos materiais poliméricos no campo da medicina. Polímeros com aplicações médicas podem ser subdivididos em dois grandes grupos: materiais usados em próteses e a produção de polímeros biologicamente ativos. Neste trabalho foram sintetizados cop
Polímeros. Publicado em: 2015-12