Separation of Sixteen Dinitrophenylamino Acids by Adsorption Chromatography on Silicic Acid-Celite

F. C. Green; L. M. Kay

doi:10.1021/ac60064a030

Thin-layer adsorption chromatography of free and conjugated bile acids on silicic acid

The Journal of Lipid Research ◽

10.1016/s0022-2275(20)40463-8 ◽

1962 ◽

Vol 3 (1) ◽

pp. 127-128

Author(s):

Alan F. Hofmann

Keyword(s):

Thin Layer ◽

Bile Acids ◽

Silicic Acid ◽

Adsorption Chromatography ◽

Layer Adsorption ◽

Conjugated Bile Acids

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Study of Thrombin-Coagulase

Thrombosis and Haemostasis ◽

10.1055/s-0038-1654156 ◽

1967 ◽

Vol 17 (03/04) ◽

pp. 321-334 ◽

Cited By ~ 7

Author(s):

J. P Soulier ◽

Odette Prou-Wartelle ◽

Liliane Hallé ◽

Keyword(s):

Esterase Activity ◽

Adsorption Chromatography ◽

The Difference

SummaryThe preparation of thrombin-coagulase is described. The properties of thrombin-coagulase are compared with those of biothrombin: kinetics, thermostability, adsorption, chromatography, esterase activity, clotting activity, action on platelets and on factors V and VIII, susceptibility to inhibitors.Biothrombin and thrombin-coagulase are closely related but distinct. Both apparently derive from prothrombin. Prothrombin and coagulase combine to form a complex: thrombin-coagulase wherein both factors are necessary for its activity. Possible explanations for the difference between thrombin-coagulase and biothrombin are proposed.

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Characteristics Of The Structure Formation Of Gypsum Binder Modified With Zinc Hydrosilicates

Promyshlennoe i Grazhdanskoe Stroitel stvo ◽

10.33622/0869-7019.2020.02.40-46 ◽

2020 ◽

pp. 40-46

Keyword(s):

Synergistic Effect ◽

Physicochemical Properties ◽

Structure Formation ◽

Silicic Acid ◽

Chemical Properties ◽

Crystal Formation ◽

Ability To Act ◽

Chemical Factors ◽

Sorption Characteristics

The authors' methodic for assessing the role of chemical and physic-chemical factors during the structure formation of gypsum stone is presented in the article. The methodic is also makes it possible to reveal the synergistic effect and to determine the ranges of variation of controls factors that ensure maximum values of such effect. The effect of a micro-sized modifier based on zinc hydro-silicates on the structure formation of building gypsum is analyzed and corresponding dependencies are found. It is shown that effects of influence of modifier on the properties of gypsum compositions are determined by chemical properties of modifier. Among the mentioned properties are sorption characteristics (which depend on the amount of silicic acid and its state) and physicochemical properties - the ability to act as a substrate during crystal formation. The proposed method can also be extended to other binding substances and materials. This article contributes to the understanding of the processes that occur during the structure formation of composites, which will make it possible to control the structure formation in the future, obtaining materials with a given set of properties.

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STEROIDSTOFFWECHSEL BEI BRUSTKREBS. III.

Acta Endocrinologica ◽

10.1530/acta.0.xxxii0023 ◽

1959 ◽

Vol XXXII (I) ◽

pp. 23-32 ◽

Cited By ~ 3

Author(s):

Kurt Schubert ◽

Hans Schröder

Keyword(s):

Advanced Cancer ◽

Liver Damage ◽

Adsorption Chromatography ◽

Hepatic Insufficiency ◽

Loading Test ◽

Patients With Cancer ◽

Urinary Steroids ◽

Normal Women

ABSTRACT A testosterone test using two different dosages was carried out simultaneously in 7 women suffering from metastasizing carcinoma of the mamma and in 3 normal women. In each case the urinary steroids were estimated before the beginning of the test and after administration of 50 mg and 100 mg of testosterone respectively; the interval between the single estimations being one week. The use of fractionated hydrolysis enabled a mild fission of the conjugates and the classification of the products into free steroids, glucuronosides, sulfates and unknown conjugates. The 17-ketosteroids and the testosterone were estimated by means of Girard's separation and adsorption chromatography. During the loading test with testosterone different behaviours became evident, which had not been realized before. The behaviour of the 17-ketosteroids rendered possible the differentiation of normal women from patients with cancer of the breast yet without hepatic insufficiency, and furthermore of these latter ones from those with a liver damage in addition to the cancer of the breast. The glucuronosides of the 17-ketosteroids are only depressed, when there exists a pronounced damage of the liver; the loading test making possible an extension of the range of recognizable damages. Furthermore, the behaviour of dehydroepiandrosterone (II/III), of androsterone (IV), and of aetiocholanolone (V) lends itself to this differentiation. In advanced cancer of the breast the values of II/III are invariably low, whilst IV and V often increase temporarily. The relation of IV to V may be altered in a different way. The excretion of not transformed testosterone is less in patients than in normal women and especially low in patients with liver damage.

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