Results 201 to 210 of about 317,473 (251)
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Reactive solvent extraction of amino acids with cationic extractants
Journal of Chemical Technology & Biotechnology, 1998A mixture of amino acids (arginine, phenylalanine, alanine, glycine and aspartic acid) in solution was extracted by four acidic extractants (dinonylnaphthalenesulphonic acid (DNNSA), di(2-ethylhexyl)monothiophosphoric acid (D2EHPA(S)), di(2-ethylhexyl)phosphoric acid (D2EHPA) and Versatic 10) in toluene. The extractive capacity of the organic phase for
Neil A. Kelly +4 more
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Reactive Extraction of Propionic Acid
2017192Propionic acid is greatly utilized in food, chemical, pharmacy, and other industries. The gaining values of fermentation explained with new techniques leads to focus on technologies for downstream processing for product separation. The reactive extraction is effectively used to recover propionic acid from process feed solution.
A. Thorgule, R. P. Ugwekar
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Reactivations of ocular toxoplasmosis after cataract extraction
Ophthalmology, 2002To determine the risk of reactivation of ocular toxoplasmosis following cataract extraction.Retrospective case-control study.Out of 154 patients with ocular toxoplasmosis, 14 patients (15 eyes) who had undergone a cataract extraction and 45 age- and sex- matched controls without cataract were selected.A review of the medical records of 14 patients with
Lotje H, Bosch-Driessen +4 more
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Reactivity of solids and extractive metallurgy
Reactivity of Solids, 1987Abstract This paper reviews the use of the reactivity of solids in extractive metallurgy. Various examples of the application of reactivity of solids in pyrometallurgy, hydrometallurgy and in solving problems of environmental protection are considered.
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Recovery of penicillin by reactive extraction in centrifugal extractors
Biotechnology and Bioengineering, 1987AbstractPenicillin V and/or G were extracted from fermentation broth by Amberlite LA‐2 in n‐butylacetate at pH 5 in a laboratory centrifugal extractor, Type SA 01 of Westfalia, up to an overall phase throughput rate of 30 L/h, in a bench‐scale four‐stage extraction system, consisting of Type TA 1 of Westfalia, up to an overall phase throughput rate of ...
Z, Likidis, K, Schügerl
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Decrease in reactivity of basophils by immunotherapy with housedust extract
Clinical & Experimental Allergy, 1985SummaryChanges of basophil reactivity to housedust extract and anti‐IgE during immunotherapy was examined in thirteen patients with bronchial asthma sensitive to housedust. (i) A significant decrease in the morphological reactivity of basophils to housedust extract was observed 6 months after the beginning of immunotherapy with the antigen, and a ...
I, Kimura +4 more
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Equilibrium studies on reactive extraction of lactic acid with an amine extractant
The Chemical Engineering Journal and the Biochemical Engineering Journal, 1997Abstract Equilibrium studies on the extraction of lactic acid from aqueous solutions with tri-n-octylamine (TOA) in xylene were made in the temperature range 293–323 K. The formulation of the extracted species in the organic phase and the corresponding equilibrium constants were numerically determined at different temperatures.
Ruey-Shin Juang, Ren-Hour Huang
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Investigation of reactive extraction on single droplets
Chemical Engineering Science, 1983Abstract Extraction of dichlorphenol from freely suspended single drops into a continuous phase enhanced by an instantaneous chemical reaction was investigated using NaOH solutions of different concentrations. Also, the reverse mass transfer direction from the continuous phase into the dispersed phase was studied by extracting salicylic acid with the
Werner Halwachs, Karl Schügerl
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Extracting Environmental Constraints in Reactive System Specifications
2015Reactive systems ideally never terminate and maintain some interaction with their environment. Temporal logic is one of the methods for formal specification description of reactive systems. For a reactive system specification, we do not always obtain a program that satisfies it because the reactive system program must satisfy the specification no ...
Yuichi Fukaya, Noriaki Yoshiura
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Process intensification with reactive extraction columns
Chemical Engineering and Processing: Process Intensification, 2008Abstract Process intensification of liquid–liquid extraction columns using reactive extraction systems and population balance modelling approaches are discussed. As a means of process intensification, bulk organic solvents could be replaced by chemically reactive organic phases in order to enhance the extraction efficiency and selectivity.
H.-J. Bart, C. Drumm, M.M. Attarakih
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