Dimethylacetamide
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. Pellet Method of Semen Cryopreservation: Effect of Cryoprotectants, Semen Diluents and Chicken Lines
Abstract The present study evaluated the effect of cryoprotectants, semen diluents and chicken lines during pellet method of semen cryopreservation. Three different experiments were conducted; Experiment 1 - semen was cryopreserved using dimethylformamide (DMF) at 6% and 9% concentrations in two semen diluents (Lake and Ravie diluent and TES/NaCl diluent), E
Braz. arch. biol. technol.. Publicado em: 01/08/2019
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2. PVC MEMBRANES PREPARED VIA NON-SOLVENT INDUCED PHASE SEPARATION PROCESS
ABSTRACT Polyvinylchloride (PVC) based membranes are prepared via a phase inversion method using N,N-dimethylacetamide (DMAc) as solvent and water as precipitation bath. Polyvinylpyrrolidone (PVP) and lithium nitrate (LiNO3) are used as additives. Experimental cloud point data and solution viscosity measurements are evaluated. Precipitation rates, transport
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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3. Improved Method for Microwave-Assisted Synthesis of Benzodiazepine-2,5-diones from Isatoic Anhydrides Mediated by Glacial Acetic Acid
An improved and simpler method for the synthesis of benzodiazepin-2,5-diones and 7-iodobenzodiazepin-2,5-diones catalyzed by glacial acetic acid using isatoic anhydride and 6-iodoisatoic anhydride, respectively, as starting materials is reported. The target products were achieved in good yields (up to 71%) using microwave irradiation as the activating mode o
J. Braz. Chem. Soc.. Publicado em: 2018-08
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4. Two novel Mg(II)-based and Zn(II)-based complexes: inhibiting growth of human liver cancer cells
Two new Mg(II)-based and Zn(II)-based coordination polymers, {[Mg3(BTB)(DMA)4](DMA)2}n (1, H3BTB=1,3,5-benzenetrisbenzoic acid, DMA=N,N-dimethylacetamide) and {(H2NMe2)2[Zn3(BTB)2(OH)(Im)](DMF)9(MeOH)7}n (2, Im=imidazole, DMF=N,N-dimethylformamide), have been successfully synthesized and structurally characterized under solvothermal conditions. 1 contains a
Braz J Med Biol Res. Publicado em: 18/12/2017
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5. Solubility of 1-Adamantanamine hydrochloride in Six Pure Solvents between 283.15 K and 333.15 K
Abstract The solubility of 1-adamantanamine hydrochloride (1-AH) in ethanol, acetic acid, distilled water, N -methylpyrrolidone (NMP), N,N -dimethylformamide (DMF) and dimethylacetamide (DMAC) between 283.15 K and 333.15 K was measured using a laser monitoring observation technique. Results of these measurements were correlated with the NRTL equation and a s
Braz. J. Chem. Eng.. Publicado em: 2017-01
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6. Comparison between electrospun and Bubbfil-spun Polyether sulfone fibers
Electrospinning is a simple method for producing ultrafine fibers, and has attracted much recent interest. The classical approach was either polymer solutions or polymer melts. Bubbfil spinning (e.g. bubble-electrospinning) is a facile method to fabricate nanofibers with high surface area to volume ratio and high porosity. Polyether sulfone (PES) dissolved i
Matéria (Rio J.). Publicado em: 2014-12
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7. Modification of PSf membrane nanostructure using different fabrication parameters and investigation of the CO2 separation properties of PDMS-coated PSf composite membranes
The effects of preparation parameters on the performance and morphology of polydimethylsiloxane/ polysulfone (PDMS/PSf) membranes were investigated. The PDMS layer is mainly used for sealing the defects of the PSf selective layer. The membrane morphologies were characterized by using scanning electron microscopy (SEM). The CO2/CH4 separation performance of m
Braz. J. Chem. Eng.. Publicado em: 2013-06
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8. Biocomposites from linters cellulose: cellulose acetate/cellulose and chitosan/cellulose films / Biocompósitos a partir de celulose de linter: filmes de acetatos de celulose/celulose e quitosana/celulose
O presente trabalho visou o estudo da modificação química da celulose de linter (obtida de fonte de rápido crescimento e considerada a celulose de maior pureza isolada de fontes vegetais) através da sua derivatização em meio homogêneo, buscando-se a obtenção de materiais com características bem definidas e via um método que apresente boa reprodut
Publicado em: 2009
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9. Avaliação de géis obtidos a partir da acetilação da quitosana em meio heterogêneo
Chitosan was acetylated during 2, 5 and 10h and physical gels were obtained at different polymer concentrations in N,N-dimethylacetamide containing 5% of LiCl. Acetylation was confirmed by infrared spectroscopy and 13C NMR, and degrees of acetylation in the range of 0.82-0.91 were determined by NMR. The O-acetylation degree (0.12-0.15) was exclusively determ
Química Nova. Publicado em: 2008
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10. Avaliação da dimetilacetamida e do glicerol na criopreservação do sêmen de suínos através de testes de fertilização in vitro / Evaluation of dimethylacetamide and glycerol on cryopreservation of boar semen through in vitro fertilization tests
A avaliação da eficiência da criopreservação do sêmen é uma importante ferramenta para viabilizar o uso de sêmen congelado na inseminação artificial em suínos. Um experimento foi realizado a fim de identificar qual crioprotetor interno (dimetilacetamida-DMA ou glicerol) seria associado com melhores indicadores de qualidade seminal pós-descongelam
Publicado em: 2008
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11. Protein profile of swine seminal plasma and its association with quality of frozen semen / Perfil protéico do plasma seminal de suínos e sua associação com a qualidade do sêmen congelado
Artificial insemination (AI) in swine with frozen semen presents lower reproductive performance than AI with cooled semen. Such inefficiency can be attributed to many factors, especially to the semen extenders and individual boar effects, since boars may have different protein content in their seminal plasma. The objective of this study was to evaluate the p
Publicado em: 2008
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12. Caracterização por ressonância magnética nuclear da celulose bacteriana acetilada em solução de dimetilacetamida/cloreto de lítio
Cellulose consists of an insoluble polysaccharide, used in industrial scale for manufacture of paper, films, or in the dust form, natural, hydrolyzed or derivatized. Bacterial cellulose, mainly produced by the bacterium Acetobacter xylinum, is identical to the vegetal one, but free of lignin and hemicellulose, wuich eliminates severe chemical processes of pu
Publicado em: 2008