Measurement of the position and intensity of chromosomal denaturation bands by an automatic system]

The band density profile of a marked chromosome was obtained using a photodiode collector combined with a minicalculator, working with an ordinary photographic document. The measurement was carried out over 10 to 20 300-point lines oriented longitudinally along the chromosome. The profile obtained corresponds to the sum of the values of each of these lines. The proposed systems's originality resides in its ability to determine the position and intensity of a band over the entire thickness of the chromosome.     

Lack of immediate response of liver tyrosine-α-ketoglutarate transaminase to exogenous adrenaline in the adrenalectomized rat

Zusammenfassung Es wird eine Steigerung der Tyrosin--Ketoglutarat-Transaminase-Aktivität in der Rattenleber durch Adrenalin bestätigt und eine Verminderung der Transaminase-Aktivität nach Adrenalektomie durch Adrenalin nachgewiesen.     

Blood histamine and response of spleen cells to phytohemagglutinins during moderate magnesium deficiency in the rat]

Blood histamine and spleen cell stimulation index by PHA were determined in either magnesium deficient or control Rats. Between the 10th and 17th days of diet (hyperemia and dermatosis period), histaminemia was significantly higher in deficient animals (485 ng/ml) than in control ones (112 ng/ml), but at the 32nd day it came back to normal values. The mean spleen cell stimulation index by PHA was depressed in deficient animals mainly between the 10th and 17th day of the deficiency; 33% of control mean value. A negative correlation is found between histamine level and stimulation index.