scholarly journals ISOLATION AND ANALYSIS OF STEROIDAL SAPONINS FROM POLYGONATUM ODORATUM (MILL.) DRUCE

2021 ◽  
Vol 55 ◽  
pp. 135-140
Author(s):  
Cristina MOGOSAN ◽  
Ilioara ONIGA ◽  
Mircea TAMAS
Keyword(s):  
Thin Layer ◽  
Acid Hydrolysis ◽  
Thin Layer Chromatography ◽  
Biological Properties ◽  
Steroidal Saponins ◽  
Physico Chemical ◽  
Layer Chromatography ◽  
Hydrolysis Of

We isolated the steroidal saponins from the rhizomes of Polygonatum odoratum (Mill.) Druce with an efficiency of 4.50% which represents 7 fractions identified by thin-layer chromatography (TLC), of which 3 were furostanics and 4 spirostanics. After the acid hydrolysis of the saponins, one aglycone (sapogenine) was identified by TLC. Further, we have determined the physico-chemical and the biological properties of the isolated saponins.

scholarly journals The reaction of iodobenzene-p-sulphonyl chloride (pipsyl chloride) with certain amino acids and peptides, and with insulin

1967 ◽  
Vol 102 (3) ◽  
pp. 815-824 ◽  
Author(s):  
J. C. Fletcher
Keyword(s):  
Amino Acids ◽  
Thin Layer ◽  
Acid Hydrolysis ◽  
Thin Layer Chromatography ◽  
Cysteic Acid ◽  
Buffer System ◽  
The Common ◽  
Layer Chromatography ◽  
Derivatives Of

1. A system of separation using buffered Celite columns is described that enables the pipsyl derivatives of most of the common amino acids to be separated. 2. The reaction of pipsyl chloride with several amino acids not included in previous studies has been investigated. In particular, knowledge of the acid-soluble pipsyl derivatives of arginine, histidine, lysine, tyrosine and cysteic acid has been extended. 3. Reproducible factors have been obtained that enable corrections to be applied for the breakdown of pipsylamino acids on acid hydrolysis. 4. The reaction of pipsyl chloride with peptides has been studied under various conditions. 5. The extent of the reaction between pipsyl chloride and insulin depends on the nature of the solvent-buffer system, and under the best conditions so far found is about 75% complete. 6. In an Appendix, the separation of pipsylamino acids by thin-layer chromatography is described.

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.

scholarly journals Acid Hydrolysis of Phenylthiohydantoins of Amino Acids

1971 ◽  
Vol 24 (4) ◽  
pp. 1247 ◽  
Author(s):  
AS Inglis ◽  
PW Nicholls ◽  
CM Roxburgh
Keyword(s):  
Amino Acids ◽  
Hydrochloric Acid ◽  
Thin Layer ◽  
Acid Hydrolysis ◽  
Free Amino ◽  
Hydriodic Acid ◽  
Ultraviolet Spectroscopy ◽  
Quantitative Identification ◽  
Layer Chromatography ◽  
Hydrolysis Of

The phenylthiohydantoins (PTHs) derived from amino acids were hydrolysed in boiling hydriodic acid for 24 hr. Good yields of free amino acids were obtained for all PTH derivatives except methionine. In contrast to hydrolysis with hydrochloric acid, hydrolysis with hydriodic acid converts PTH-threonine, PTH-serine, and PTH-tryptophan respectively to oc-amino-n-butyric acid, alanine, and a mixture (approx. 2: 1) of glycine and alanine. This procedure provides a useful adjunct to thin-layer chromatography and ultraviolet spectroscopy for quantitative identification of the PTH derivative.

scholarly journals Original Article BIOACTIVE COMPOUNDS FROM SPONGE SUBERITES CARNOSUS (JOHNSTON) COLLECTED FROM WEST COAST OF MUMBAI, INDIA

2021 ◽  
pp. 41-51
Author(s):  
BHADEKAR N. S ◽  
ZODAPE G. V.
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Bioactive Compounds ◽  
West Coast ◽  
Acid Methyl Ester ◽  
Biological Properties ◽  
Gas Chromatography Mass Spectrometry ◽  
Ftir Analysis ◽  
Infrared Spectrometer ◽  
Layer Chromatography

Objective: Structural elucidation of bioactive compounds from marine Sponge Suberites Carnosus (Johnston) by using Thin Layer Chromatography (TLC), Gas Chromatography-Mass Spectrometry (GC-MS), Fourier Transform Infrared Spectrometer (FTIR) techniques with respect to its pharmacological and biomedical properties. Methods: The sponge Suberites carnosus (Johnston) was collected during low tides from West Coast of Mumbai. Crude extract was obtained by taking 10 gram of sponge sample in10 ml of methanol. The preparative TLC (Thin Layer Chromatography) was performed by using Toluene: Ethyl acetate: Diethylamine (7:2:1) (v/v). The isolated compounds were subjected to GC-MS and FTIR analysis. Results: From the GC-MS and FTIR analysis, total ten compounds were identified. The GC-MS spectra correlate to the mass spectra. The structures of those compounds are 6-Fluoro 2-trifluromethylbenzoic acid,2,3-dichlorophenyl ester, Eicosane 3-cyclohexyl, Phosphine imide, P,P,P,-tris (p-chlorophenyl)-N-phenyl-, Dimethylhyl hexavinyl octasilsesquioxane, Hexanoicacid, hexadecyl ester, Hexadecanoic acid,2-hydroxy1-(hydroxymethyl)ethyl ester, 9, 19-Cyclolanostan-3-ol, acetate, (3β), Tetracosane, 3-ethyl-, 11, 14-Eicosadienoic acid, methyl ester, Triacontane, 11,20-didecyl-respectively. Conclusion: The nature and biological properties of the said compounds were determined and it was found that some of them act as a skin irritant. Some of them have fatty, metabolite, and irritant property, whereas some are act as masking and perfuming agents. Some compounds are highly toxic property, whereas others have an effect on health and environmental hazard. Some are highly corrosive in nature, whereas others are Cholesterol and chemotaxonomic significance.

Pharmacognostic studies of Flemingiavestita

2019 ◽  
Vol 6 (1) ◽  
pp. 21-28
Author(s):  
Wympher Langstang ◽  
Melvorene Kharsahnoh ◽  
Teilinda Khongwir ◽  
N Venugopal
Keyword(s):  
Amino Acids ◽  
Thin Layer ◽  
Key Words ◽  
Thin Layer Chromatography ◽  
Tannic Acid ◽  
Physico Chemical ◽  
Protein Amino Acids ◽  
Phytochemical Studies ◽  
Layer Chromatography ◽  
Histological Parameter

Abstract: Flemingia vestita(Family: Fabaceae), is a leguminous root crop commonly found in the northeastern region of India. The tubers are anthelmintic and eaten unpeeled by the natives against gastrointestinal worminfection. The present study deals with the pharmacognostic studies on the rhizome of crude drug F. vestita. Our preliminary phytochemical studies of the powdered rhizome revealed the presence of alkaloid,carbohydrate, protein, amino acids, phenol, tannic acid flavonoid,phytosterols, saponins,fat, oil, gum and mucilage. The physico-chemical, morphological, histological parameter may be proposed as parameters to establish the authencityof F. vestita. Key words: Flemingiavestita, pharmacognostic, phytochemicals, thin layer chromatography

Studies of the Chemical and Biological Properties of the Skeletal Imaging Agent 99mTc-Methylene Diphosphonate

1982 ◽  
Vol 21 (04) ◽  
pp. 150-156 ◽  
Author(s):  
D. Djokić ◽  
N. Paunković ◽  
D. Gorkić ◽  
N. Vanlić-Razumenić
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Clinical Application ◽  
Paper Chromatography ◽  
Gel Filtration ◽  
Biological Properties ◽  
Clinical Applications ◽  
Molar Ratio ◽  
Kidney Imaging ◽  
Layer Chromatography

Studies of the chemical and biological properties as well as of the optimization of a 99mTc-MDP kit for clinical application have been performed. During the preparation of a Sn-MDP complex for labelling with 99mTc, the molar ratio of the reactants [MDP: Sn (II)], the concentration of the Sn-MDP complex and the pH of the 99mTc-MDP solution have been varied and their effects on biodistribution examined. The radiochemical composition of the labelled solutions was checked by paper chromatography, thin-layer chromatography and gel-filtration. The results of clinical applications for bone and early kidney imaging are also reported.

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