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Spectrophotometric flow-injection determination of sulphite in white wines involving gas diffusion through a concentric tubular membrane
(2003-07-14)
A flow-injection system is proposed for the spectrophotometric determination of sulphite in white wines. The method involves analyte conversion to SO2, gas diffusion through a Teflon® semi-permeable membrane, collection ...
Spectrophotometric flow-injection determination of sulphite in white wines involving gas diffusion through a concentric tubular membrane
(2003-07-14)
A flow-injection system is proposed for the spectrophotometric determination of sulphite in white wines. The method involves analyte conversion to SO2, gas diffusion through a Teflon® semi-permeable membrane, collection ...
An evaluation of three upwinding approximations for numerical modeling the flow in tubular membrane of Newtonian and non-Newtonian fluids
(ELSEVIER SCIENCE INC, 2011)
In this paper, the laminar fluid flow of Newtonian and non-Newtonian of aqueous solutions in a tubular membrane is numerically studied. The mathematical formulation, with associated initial and boundary conditions for ...
Potentiometric determination of L-ascorbic acid in pharmaceutical samples by FIA using a modified-tubular electrode
(Soc Brasileira QuimicaSao PauloBrasil, 2000)
Construction and evaluation of an ammonium tubular ion-selective electrode with ionophore nonactin.
(Soc Brasileira QuimicaSao PauloBrasil, 1996)
Manufacture of ceramic membranes for application in demulsification process for cross-flow microfiltration
(ELSEVIER SCIENCE BV, 2009)
This paper describes the manufacture of tubular ceramic membranes and the study of their performance in the demulsification of soybean oil/water emulsions. The membranes were made by iso-static pressing method and micro ...
Determination of acetylsalicylic acid by FIA-potentiometric system in drugs after on-line hydrolysis
(Elsevier Science BvAmsterdamHolanda, 1999)
Fracionamento de subproduto do processamento de lignina por processos com membranas para obtenção de compostos fenólicos
(2020)
A polpação kraft é o processo mais empregado no mundo para extração da celulose. Neste processo são separadas celulose com uma fração de hemicelulose e lignina com algumas frações degradadas de hemicelulose. Um dos produtos ...
Single-channel recording of inositol trisphosphate receptor in the isolated nucleus of a muscle cell line
(SOCIEDAD BIOLGIA CHILE, 2006)
Nuclear calcium appears to have an important role in the regulation of gene expression in many cells, but the mechanisms involved in controlling nuclear Ca2+ signaling are controversial and still poorly understood. We have ...