Search PubMed⌕ Search

Biomedical subjects

K Verma

Publications and source records attributed to K Verma.

At least 127 records · Page 7Linked to original sources
PubMed1979

Structure and synthesis of naturally occurring anhydrovitamin A2.

The structure of naturally occurring anhydrovitamin A2 was elucidated as 3-hydroxyanhydroretinol from study of its u.v.--visible, i.r., n.m.r. and mass spectra. The structure has been confirmed by a chemical synthesis. Saccobranchus fossils, a freshwater fish, can convert 3-hydroxyretinol into 3-hydroxyanhydroretinol, which in turn is converted into-3-dehydroretinol. Chemical conversion of 3-hydroxyretinol into 3-dehydroretinol was also carried out.

Animals↗
PubMed1979

Potential biosoluble carriers: biocompatibility and biodegradability of oxidized cellulose.

The biocompatibility and biodegradability of periodate oxidized cellulose is assessed in vivo. Morophological and histopathological studies over a period of six months indicate that oxidized cellulose degrades slowly without producing excessive tissue reaction. Preliminary investigations on the kinetics of degradation of oxidized cellulose in vitro, immobilization of alpha-chymotrypsin on it and the rate of the enzyme release in a solution of pH 7.4 are also briefly reported.

Animals↗
PubMed1977

Occurrence of 3-hydroxyretinol in the freshwater fish Bagarius bagarius and Wallago attu. Isolation and synthesis.

A new chromogen that absorbs maximally at 329 nm was frequently found in the liver oils of the freshwater fish Bagarius bagarius and Wallago attu. It was shown to be a diester of 3-hydroxyretinol. 3-Hydroxyretinol was found to be a metabolite of lutein during the biosynthesis of 3-dehydroretinol in a freshwater fish. A new method for the chemical synthesis of 3-hydroxyretinol from methyl 3-dehydroretinoate is described. The possible pathway for the conversion of lutein into 3-dehydroretinol in vivo is discussed.

Animals↗
PubMed1975

Malignant parotid cyst.

A case of primary malignant cyst of the parotid gland is described, and the possible origins of such cysts are discussed.

Aged↗