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Biomedical subjects

D Mishra

Publications and source records attributed to D Mishra.

At least 37 records · Page 2Linked to original sources
PubMed1989

Prevalence of PPNG strains & in vitro sensitivity pattern of Neisseria gonorrhoeae in Varanasi (Uttar Pradesh, India).

Forty one consecutive gonococcal isolates were tested by disc method for their sensitivity to penicillin and seven other antimicrobials. Nineteen (46.34%) strains of N. gonorrhoeae were found to be relatively resistant to penicillin (MIC over 0.25 IU/ml) including 2 (4.88%) strains with complete resistance to penicillin (MIC over 1 IU/ml). None of the gonococcal strains tested was penicillinase-producing (PPNG). A decline in the proportion of sensitive strains of gonococci with a non-significant rise in median value of MIC for penicillin from 2.16 IU/ml in 1980-81 to 2.52 IU/ml in 1986-87 and other antimicrobials was observed.

Anti-Bacterial Agents↗
PubMed1979

Pyrophosphatase, Peroxidase and Polyphenoloxidase Activities during Leaf Development and Senescence.

Inorganic pyrophosphatase, peroxidase, and polyphenoloxidase activities were studied as the function of leaf insertion level in eight monocotyledonous and eight dicotyledonous species. Alkaline inorganic pyrophosphatase shows a declining activity toward the end of senescence whereas no regular drift in either peroxidase or polyphenoloxidase activities was noticed during senescence of attached leaves. In the primary leaves of rice, peroxidase and polyphenoloxidase activities were high in the senescent leaves and there exists a correlation between chlorophyll content and peroxidase activity though not with polyphenoloxidase activity. Upon detachment leaves exhibit increasing peroxidase and polyphenoloxidase activities with time. The distribution of the enzyme activities during senescence of attached leaves is suggested to be species-specific, and an increase in peroxidase and polyphenoloxidase activities cannot be taken as an indicator of leaf senescence.

Journal Article↗
PubMed1976

Catalase, Peroxidase, and Polyphenoloxidase Activities during Rice Leaf Senescence.

The activities of catalase, peroxidase, and polyphenoloxidase were studied in attached and detached rice (Oryza sativa L. cv. Ratna) leaves. Catalase activity decreased while peroxidase and polyphenoloxidase activities increased during senescence of both attached and detached rice leaves. Kinetic (5 mum) and benzimidazole (1 mm), which are known to delay the senescence of detached rice leaves, retarded the decrease of catalase activity during detached leaf senescence. On the other hand, these chemicals accelerated the increase of peroxidase and polyphenoloxidase activities over the water control. Total phenolics accumulated in detached and darkened rice leaves, but in attached leaf senescence in light no accumulation of phenolics was observed.

Journal Article↗
PubMed1972

Effect of Transpiration-reducing Chemicals on Growth, Flowering, and Stomatal Opening of Tomato Plants.

Phenyl mercuric acetate, 8-hydroxyquinoline, N-dimethylamino succinamic acid, or 2-chloroethyl trimethyl ammonium chloride were sprayed on 37-day-old tomato (Lycopersicon esculentum Mill. cv. Sioux) plants seven times at weekly intervals. Plants of nearly normal appearance resulted with all treatments except 2-chloroethyl trimethyl ammonium chloride. There was no change in leaf number, but 2-chloroethyl trimethyl ammonium chloride increased the number of flowers. 2-Chloroethyl trimethyl ammonium chloride and phenyl mercuric acetate caused earlier flowering. Yield was not affected significantly. Stomatal opening was reduced 80% immediately after spraying with phenyl mercuric acetate or 2-chloroethyl trimethyl ammonium chloride, but 6 days after spraying, the reduction in stomatal opening was only 30 to 40%. Wilting was delayed 8 days by phenyl mercuric acetate and 4 days by 2-chloroethyl trimethyl ammonium chloride and N-dimethyl amino succinamic acid treatments, when water was withheld 59 days after the final spray application.

Journal Article↗