Toxicity of Certain Phosphorus Compounds to Cotton Insects1

Phosphorus Compounds of Cotton Embryos and Their Changes during Germination.

The phosphorus compounds of cotton embryos, particularly ribonucleic (RNA) and deoxyribonucleic (DNA) acid, and their metabolism during germination have not been intensively investigated with modern methods of analysis. In the period 1913 to 1918 Anderson (1) and Rather (9) elucidated the true nature of phytic acid, the principal form of seed phosphorus. Although Anderson obtained the hexaphosp...

Catalytic decomposition of phosphorus compounds to produce phosphorus atoms

Effect of Chromium on Certain Aspects of Cellular Toxicity

Introduction: The impact of chromium exposure was studied on liver, kidney, testis, spleen, cerebrum and cerebellum of male Wistar rats (80-100 g body weight). Material & Method: It was observed that treatments of rats with chromium (i.p. at a dose of 0.8 mg / 100 g body weight per day) for a period of 28 days caused significant increase in chromium content while declining the body weight a...

Phosphorus Compounds in Animal Tissues

The concept that nucleic acids are intimately associated with fundamental cellular processes has gained considerable favor within the last few years. This can undoubtedly be attributed to the researches of Caspersson and his associates. Caspersson, with the aid of ultraviolet spectrophotometry, has been able to measure the nucleic acids in various parts of the cell under a variety of experiment...

Phosphorus Compounds in the Cell

In the first paper in this series (Davidson, Frazer & Hutchison, 1951) it was emphasized that in experiments on the incorporation of radioactive phosphorus (32p) into the nucleic acids and their derivatives in the cell, it was essential, in order to obtain true specific activities, to separate the nucleotide fractions in a form free from all traces of highly active contaminants. The procedure o...