Results 301 to 310 of about 311,496 (336)

Identification and quantification of polyethylene glycol types in polyethylene glycol methyl ether and polyethylene glycol vinyl ether

Journal of Chromatography A, 2009
Quantitative determination of polyethylene glycol (PEG) impurities in two monofunctional polyglycol types, PEG methyl ether (M-PEG) and PEG vinyl ether (V-PEG), has been carried out by reversed-phase liquid chromatography with evaporative light scattering detection (ELSD).
Stephen L. Sjoberg, Donald H. Champion, Bhajendra N. Barman   +2 more
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Dissolution properties of polyethylene glycols and polyethylene glycol-drug systems

International Journal of Pharmaceutics, 1979
Abstract The release of polyethylene glycol from discs prepared using polyethylene glycols of differing molecular weight was determined. The influence of polyethylene glycol weight fraction on the release of hydroflumethiazide and bendrofluazide from drug—polymer solid dispersions was also investigated.
Owen I. Corrigan, R.P. Timoney, C.A. Murphy   +2 more
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Polyethylene glycol and solutions of polyethylene glycol as green reaction media

Green Chemistry, 2005
In this review, we examine the concept that aqueous biphasic reactive extraction (ABRE) can successfully integrate the solvent properties of polyethylene glycol (PEG) and its phase-transfer characteristics into a single efficient system which can additionally be manipulated to facilitate the separation of reactants and/or catalysts from products.
Robin D. Rogers, Scott K. Spear, Jonathan G. Huddleston, Ji Chen   +3 more
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Polyethylene glycol derivatives of procaine

Journal of Medicinal Chemistry, 1973
AbstractPolyäthylenglykole (I) geben mit Phosgen die Chlorkohlensäureester (III), di mit Procain zu (IV) amidiert werden.
Albert Zilkha, Ben-Zion Weiner
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Modification of polyethylene glycol

European Polymer Journal, 1988
Abstract The products of the oxidation of the hydroxyl groups of polyethylene glycol with a mixture of dicyclohexyl carbodiimide, dimethylsulphoxide and o -phosphoric acid in CHCl 3 or CCl 4 at room temperature (Pfitzner-Moffatt reaction) have been studied.
V.P. Zubov, A.I. Kuzaev, I.N. Topchieva
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The densities of polyethylene glycols

Chemical Engineering Science, 1989
Abstract The densities of five polyethylene glycols (ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol and pentaethylene glycol) at temperatures between 398 and 423 K were measured using a vibrating tube densitometer and are reported in this paper.
Wahid Y. Tawfik, Amyn S. Teja
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Esterification of Polyethylene Glycols

Journal of Macromolecular Science: Part A - Chemistry, 1984
Abstract Esterification of polyethylene glycols by various carboxylic acids in high yield and high substitution levels is described. The esterification reaction is achieved by dicyclohexylcarbodiimide and catalyzed by dimethylaminopyridine. Rate measurements indicated that the reaction is complete after 2 h at room temperature.
Albert Zilkha, Samuel Zalipsky, Chaim Gilon   +2 more
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Lyophilization of polyethylene glycol mixtures

Journal of Pharmaceutical Sciences, 2004
Lyophilization of cosolvent systems may be a beneficial way of enhancing both physical and chemical stability of a drug product. The objective of this research is to establish whether cosolvent systems commonly used in the formulation of poorly water-soluble drugs can be successfully lyophilized. Polyethylene glycol (PEG) 400 was selected because it is
Rose-Marie Dannenfelser, Ketan Amin, Barbara Wang, Joseph Lawrence Zielinski   +3 more
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Decomposition of Aspirin in Polyethylene Glycols

Journal of Pharmaceutical Sciences, 1972
Decomposition of aspirin in polyethylene glycols was studied at four temperatures. The decomposition proceeded as a pseudo-first-order reaction at these temperatures. Different molecular weights of polyethylene glycol did not affect the reaction rate.
C.W. Whitworth, L.A. Luzzi, H.W. Jun
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Polyethylene Glycol in Suppositories: Carcinogenic?

Annals of Internal Medicine, 1980
Excerpt To the editor: Polyethylene glycol, a family of chemical compounds composed of linear polymers of ethylene oxide and water, is a component in many medications, including ointments, where it...
MARK H. GREENE, TINA I. YOUNG, GEORGE S. EISENBARTH   +2 more
openaire   +3 more sources