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Biomedical subjects

A Ghosh

Publications and source records attributed to A Ghosh.

At least 451 records · Page 25Linked to original sources
PubMed1976

Cytochemical study of adrenal medulla of pigeons exposed to high altitude.

The concentration of adrenomedullary catechol hormones along with various types of mucopolysaccharides was studied in groups of control pigeons kept at sea level and in those exposed to high altitudes (1150,3490 and 4880 m, at 24, 8 and 2 degrees C respectively) of the Himalayan range. The exposed birds displayed an appreciable depletion of noradrenaline and periodate-reactive neutral mucopolysaccharides was noted, whereas the basophilia of the adrenomedullary tissue resulting from the presence of by weakly acidic muco-substances was slightly increased. The significance of these findings is discussed.

Adrenal Medulla↗
PubMed1975

Effect of some autonomic drugs on heat defence in the pigeon.

As compared to the time of median control death (i.e. the time inducing 50% death in untreated birds at 50 degrees C), exogenous noradrenaline afforded 100% survival in the blue rock pigeon, Columba livia. The survival percentages with the other autonomic drugs were: chlorpromazine 70%; reserpine 60%; adrenaline 60%; pentolinium 50% and dihydroergotamine 30%. The time of median control death at 50 degrees C was found to be 3.5 hours in the pigeon. During 10-day exposure at 45 degrees C all the birds pre-treated with noradrenaline survived, and 47% of those treated with adrenaline and 42% of the untreated birds survived the stress. It is concluded that noradrenaline acts definitely as a "heat protective" hormone in the pigeon.

Animals↗