cytotoxicity evaluation of daphne mucronata (thymelaeaceae) extract and one of its active purified components, using seven different cancerous cell lines, revealed the strong antiproliferative activity of the plant. using flow cytometry technique, it was found that treatment of the most responsive cells (k562) with the plant extract or the active component inhibited the progression of cells thr...

INTRODUCTION Synthesis in the field of nucleic acids has been a major and continuing interest in my laboratory ever since we knew the structures of the nucleic acids. Clearly the foundations of synthetic work in the nucleotide field were laid by the prolonged and intensive efforts of Professor Todd's laboratory (Cambridge, England) and it was my good fortune to be associated with this laborator...

trichophyton rubrum (t. rubrum) is an anthropophilic dermatophyte that is distributed worldwide and causes common cutaneous disease such as mycosis. although several properties of this fungus have been investigated so far, however a few studies were carried out in the field of molecular biology of this fungus. in the present study we tried to identify its molecular characterization of the goano...

Gale & Folkes (1953a, b) showed that there is an inorease in the nucleic acid content of washed suspensions of Staphylococcus aureus (Micrococcu4s pyogenes var. aureus) when these are incubated in the presence of glucose, purines, pyrimidines and a mixture of all those amino acids necessary for protein synthesis. Omission of an essential amino acid resulted in cessation of nucleic acid synthesi...

The process of carcinogenesis following exposure of mice to urethane is demonstrated in the present work to be intimately related to nucleic acid synthesis. Injection of animals with a DNA hydrolysate immediately prior to a single exposure of the animals to urethane markedly reduced the number of pulmonary adenomas initiated. Aminopterin, known to interfere in nucleic acid synthesis (46), poten...

The accumulation of labeled phosphorus into newly synthesized nucleic acids or peanut cotyledon slices incubated with chloramphenicol, puromycin, or 2,4-dichlorophenoxyacetic acid (2,4-D) was reduced. Promotion of nucleic acid synthesis was not noted by any of these chemicals. Chloramphenicol completely inhibited the synthesis of the DNA-RNA fraction at 1.25 x 10(-3)m while soluble and ribosoma...