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Biomedical subjects

J K Gupta

Publications and source records attributed to J K Gupta.

80 records · Page 5Linked to original sources
PubMed1976

Effect of sugars, hydrogen ion concentration and ammonium nitrate on the formation of citric acid by Aspergillus niger.

Aspergillus niger Mulder strain when grown on a synthetic medium containing urea as the sole source of nitrogen at pH 5.2, formed a mixture of citric and gluconic acids. On growing the organism at pH 2.0 the gluconic acid content was reduced but citric acid yield remained low. Addition of NH4NO3 to the medium lowered the gluconic acid yields to undetectable levels with a simultaneous increase in the citric acid content. Of the sugars used for the production of citric acid, sucrose in an unautoclaved medium was found to be the best carbon source. Sucrose medium if autoclaved at pH 2.0, or a mixture of glucose and fructose instead of sucrose gave lower yields of citric acid. Under optimum conditions only citric acid was produced and the yield was 66-68 per litre after a growth period of about 10 days.

Aspergillus↗
PubMed1975

N-Substituted indanamines as potential hypoglycemic agents.

A number of indanamines substituted at the terminal amino nitrogen with various aliphatic, alicyclic, heterocyclic, and aromatic ring systems were synthesized and screened for hypoglycemic activity. None was found to possess significant activity compared to tolbutamide.

Amines↗
PubMedDate not supplied

Anti-inflammatory derivatives of indan-1-acetic acids with low gastric irritancy.

In an attempt to minimize the gastric ulcerogenicity of 6-methoxyindan-1-acetic acid and 5,6-dimethoxyindan-1-acetic acid exhibiting high anti-inflammatory activity, we synthesized their esters, amides and nitrile derivatives. It was found that the anti-inflammatory activity of ethyl esters were almost equal to those of parent acids and phenylbutazone while other derivatives were less potent. Those ethyl esters were also found to be much less ulcerogenic than phenylbutazone.

Animals↗
PubMedDate not supplied

Studies on anti-inflammatory, analgesic and antipyretic activities of some indan acids.

A series of indan-1 acids were synthesized and screened for anti-inflammatory activity. All the reported compounds showed varying degrees of anti-inflammatory activity in carrageenin-induced paw oedema test. They also exhibited appreciable antipyretic and analgesic activity in various animal test models. Among these compounds 6-methoxy-indan-1-acetic acid (compound 11) and 5,6-dimethoxy-indan-1-acetic acid (compound 12) showed activity profile close to that of phenylbutazone having prolonged action and lower toxicity than the latter.

Animals↗
PubMedDate not supplied

Further studies on anti-inflammatory activity of two potent indan-1-acetic acids.

The anti-inflammatory activity of 6-methoxyindan-1-acetic acid (1a) and 5,6-dimethoxyindan-1-acetic acid (1b) was evaluated in various acute, subacute and chronic models of inflammation. The results of these studies suggest that they have equal or slightly more anti-inflammatory activity than phenylbutazone, a standard anti-inflammatory drug. Of the two compounds, 5,6-dimethoxyindan-l-acetic acid appeared to be slightly more active than 6-methoxyindan-l-acetic acid.

Animals↗