Now showing items 11-20 of 144
Separation of bile acids from neutral lipids on thin-layer chromatograms
(Elsevier, 1974-11-13)
A game to help students comprehend enzyme structure and mechanism of action
(Elsevier, 1976-01)
Determination of iodoamino acids and inorganic lodide by thin-layer chromatography
(Elsevier, 1970-10)
A method has been presented for the separation of monoiodotyrosine diiodotyrosine, diiodothyronine, triiodothyronine, thyroxine, and inorganic iodide from one another by thin-layer chromatography on silica gel. The solvent ...
Aspirin as a quantitative acetylating reagent for the fatty acid oxygenase that forms prostaglandins
(Elsevier, 1976-01)
A selective acetylation of the prostaglandin-forming fatty acid oxygenase (part of the prostaglandin "synthetase" system) occurs with 100 [mu]M concentrations of aspirin (acetylsalicylic acid). The amount of acetylation, ...
Synthesis of potential antiprogestogens
(Elsevier, 1976-01)
Acylated derivatives of 17[alpha]-hydroxyprogesterone were prepared in order to test the hypothesis that dialkylamino alkyl moieties have the effect of transforming progestogens into antiprogestogens. This approach has ...
Stimulation by prostaglandin E2 of glucagon and insulin release from isolated rat pancreas
(Elsevier, 1975-09)
To ascertain whether prostaglandins (PG) may play a role in the secretion of glucagon and in an attempt to elucidate the conflicting observations on the effects of PG on insulin release, the isolated intact rat pancreas ...
The inhibitive effects of steroid analogues in the binding of tritiated 5[alpha]-dihydrotecto3terone to receptor proteins from rat prostate tissue
(Elsevier, 1975-02)
The relationship between molecular structure and the binding potential of steroids to receptor proteins was investigated. Twenty-four selected steroids were studied in minced incubations of rat pro state tissue. Measurements ...
Fluorescein isothiocyanates: Improved synthesis and purity : Spectral studies
(Elsevier, 1974-01)
Modification of the methods of synthesis by direct reaction of the isomeric aminofluoresceins with a limited excess of thiophosgene in the presence of calcium carbonate has yielded the 5- and 6-isothiocyanatofluoresceins ...
Simple procedures for the rapid cleavage of ester lipids and for the large-scale isolation from brain of cerebroside sulfate
(Elsevier, 1979-12)
The ester groups of glycerophospholipids in tissue extracts can be cleaved in less than 10 min at room temperature if the lipids are extracted with hexane-isopropanol and the filtrate is treated with methanolic NaOH. The ...
Properties of a partially-purified preparation of the prostaglandin-forming oxygenase from sheep vesicular gland
(Elsevier, 1975-11)
The fatty acid oxygenase of sheep vesicular glands was solubilized with Tween-40 and purified 60-fold using ammonium sulfate precipitation and DEAE-cellulose chromatography. Glycerol (50%) stabilized the activity at all ...