N N Dimethylacetamide
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. 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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2. 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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3. 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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4. 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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5. 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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6. 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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7. Complexes between lanthanide picrates and N,N-dimethylacetamide (DMA): synthesis, characterization, spectroscopic studies and thermal behavior / Síntese, caracterização, estudos espectroscópicos e termoanalíticos de compostos de picratos de lantanídeos com o ligante N,N - Dimetilacetamida (DMA)
Nesta tese são descritos as preparações e caracterizações dos compostos de picratos de Ln (III) com o ligante N,N - Dimetilacetamida (DMA). Apresentaram a seguinte estequiometria: Ln(pic)3.3DMA, Ln = La(III) - Lu(III) e Y(III). A coordenação do ânion picrato foi sugerida pelo comportamento não-eletrólito em solução de acetonitrila e nitrometano e
Publicado em: 1997
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8. Estudo termodinamico da interacao de ions lantanideos - (III) e anion cloreto em N, N-dimetilacetamida
By using the calorimetric titration tecnique, the following equilibria in N,N-dimethylacetamide (DMA) solutions, at 298K, have been studied: Ln(sol) + X¨(sol) LnX (sol) Ln(sol) + X¨(sol) LnX2 (sol) where Ln = Y and lanthanide elements (except Pm), and X¨ = Cl. Also, when Ln = La and Nd and X¨ = Br e NO3. The stoichiometric equilibrium constants (K1 and K
Publicado em: 1978
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9. Compostos de adição entre hexafluorofosfatos de ítrio e lantanídeos (III) e a N,N - Dimetilacetamida (DNA) / N,N-Dimethylacetamide adducts of lanthanide hexafluorphosphates
The preparation and characterization of adducts between lanthanide hexafluorophosphates and DMA are described. According to elemental analysis the compounds present two general compositions: Ln(PF6)3.7DMA (Ln= La-Ho) and Ln(PF6)3.6DMA (Ln= Er-Lu, Y). The compounds are crystalline, not hygroscopic and melt between 115-125°C. They are soluble in water, nitrom
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/1977
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10. Induction of erythroid differentiation in murine virus infected eythroleukemia cells by highly polar compounds.
Murine-virus-infected erythroleukemia cells cultured in a medium with dimethylsulfoxide or N,N-dimethylformamide are induced to differentiate to erythroid cells. A number of highly polar compounds have a similar effect in inducing erythroid differentiation of the virus-infected cells, as assayed by the appearance of hemoglobin. These compounds are 1-methyl-1
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11. Erythroid cell differentiation: murine erythroleukemia cell variant with unique pattern of induction by polar compounds.
The murine-virus-infected erythroleukemia cell system provides an opportunity to examine regulatory mechanisms controlling cytodifferentiation. A cloned cell line (DR10c3) resistant to the erythropoiesis-inducing effect of dimethylsulfoxide (Me2SO) was isolated from the Me2SO-sensitive line DS19. DR10c3 is characterized as follows: (1) the uptake of [3H]Me2S
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12. Oral formulation of a novel antiviral agent, PG301029, in a mixture of Gelucire 44/14 and DMA (2∶1, wt/wt)
To develop an oral formulation for PG301029, a novel potent agent for the treatment of Hepatitis C virus infection, that not only has very low aqueous solubility but also degrades rapidly in water. The solubility of PG301029 was determined in water, various aqueous media, and several neat organic solvents. The stability of PG301029 was monitored at room temp
Springer-Verlag.