Sterols produced by Cryptotnonas ovata var. palustris

1968 ◽  
Vol 14 (8) ◽  
pp. 837-839 ◽  
Author(s):  
R. P. Collins ◽  
K. Kalnins
Keyword(s):  
Infrared Spectroscopy ◽  
Melting Point ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Mass Spectroscopy ◽  
Layer Chromatography

Cholesterol and stigmasterol were isolated from C. ovata var. palustris. The compounds were identified by thin-layer chromatography, mass spectroscopy, infrared spectroscopy, derivative formation, and melting point determinations.

scholarly journals SINTESIS CALKON ((E)-1,3-DI(NAPHTHALEN-2-YL)PROP-2-EN-1-ONE) DAN AKTIVITASNYA SEBAGAI ANTIOKSIDAN

2012 ◽  
Vol 3 (1) ◽  
pp. 7-14
Author(s):  
Rahmiwati Hilma ◽  
Jasril ◽  
Hilwan Yuda Teruna
Keyword(s):  
Free Radical ◽  
Melting Point ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Room Temperature ◽  
Intermediate Compound ◽  
Alkaline Condition ◽  
Point Measurement ◽  
Anti Inflammatory ◽  
Layer Chromatography

Study on chalcone calkon (E)-1,3-di(naphthalen-2-yl)prop-2-en-1-one synthesis have been carried out with stirrer methode. These compounds can be used as intermediate compound to synthesize others compounds which was reported having antimicrobial, anti-inflammatory, anti-depressant, anti-tumour. The of chalcones synthesis vatives were reported in acid and alkali condition. In this study, chalcone and its derivates were synthesized by using stirrer method in alkaline condition in room temperature. the compounds subjected to somes analyses including melting point measurement, thin layer chromatography and HPLC. Scavenging free radical by using DPPH methode showed Scavenging free radical with LC50 >80 μg/ml min potent activity while the ascorbat acid LC50 89,79 μg/ml.

DDT-Type Compounds: Separation and Identification by a System Combining Thin Layer Chromatography, Gas Chromatography, and Infrared Spectroscopy

1968 ◽  
Vol 51 (6) ◽  
pp. 1247-1260
Author(s):  
M B Abou-Donia ◽  
D B Menzel
Keyword(s):  
Gas Chromatography ◽  
Infrared Spectroscopy ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Electron Capture ◽  
Structural Changes ◽  
Effective Technique ◽  
Rf Values ◽  
Solvent Systems ◽  
Layer Chromatography

Abstract Infrared spectroscopy, in combination with TLC and GLC, offers an effective technique for isolation, separation, and identification of DDT-type compounds. Rf values for DDT and 13 other compounds, most of which have been reported as DDT breakdown products, have been determined in 27 solvent systems, using TLC techniques. Three columns, in combination with the electron capture detector, have been experimentally studied to analyze the 13 DDT-like compounds. The positions and intensities of the infrared bands of the 14 compounds have been measured in KBr. The variations of these measurements have been discussed in relation to the structural changes of DDT-type compounds.

A PRACTICAL METHOD FOR ESTIMATION OF URINARY PREGNANEDIOL AND ALLOPREGNANEDIOL USING THIN LAYER CHROMATOGRAPHY

1965 ◽  
Vol 49 (1) ◽  
pp. 97-106 ◽  
Author(s):  
S. Sulimovici ◽  
B. Lunenfeld ◽  
M. C. Shelesnyak
Keyword(s):  
Melting Point ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Practical Method ◽  
Melting Point Determination ◽  
Uv Absorption Spectra ◽  
Infra Red ◽  
Point Determination ◽  
Layer Chromatography ◽  
Hydrolysis Of

ABSTRACT A method is described for the assay of urinary pregnanediol and allopregnanediol which employs acid hydrolysis of pregnanediol glucuronide, ascending thin-layer chromatography and spectrophotometric quantitation of the eluted pregnanediol and allopregnanediol. The reliability of the method was established by analysis of infra-red and UV absorption spectra, melting point determination, recovery experiments, duplicate assays and comparison with the Klopper method. The method has advantages in that it is rapid and requires small urine samples.

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