The Dampening of DNA Replication Cycles after X-Irradiation or Ultraviolet Light Irradiation

Antibacterial response of Cd-TiO2/PEG/folic acid nanocomposite under ultraviolet, visible light, or ultrasonic irradiation

Synthesis and characterization of Cd-TiO2/PEG/FA nanocomposite as a biomaterial is the main aim of this research. Cd-doped TiO2 nanoparticles (NPs) were synthesized by solvothermal assisted sol-gel method. Then, polyethylene glycol (PEG) was added to the as-synthesized NPs in order to modify their surface and to prevent agglomeration. In the next step, folic acid (FA) was conjugated to Cd-TiO2/...

Alterations of liver DNA after X-irradiation.

Ataxia telangiectasia: an anomaly in DNA replication after irradiation.

The effect of increasing dose of gamma-radiation on DNA synthesis in an ataxia telangiectasia lymphoblastoid cell line and a number of control lymphoblastoid cell lines was investigated. No significant inhibition of low molecular weight DNA synthesis was observed in the AT cell line at doses which resulted in considerable inhibition in the control cell lines. At higher doses, 600 to 800 rad, lo...

Ultrastructural changes in Euglena after ultraviolet irradiation.

The structural changes associated with the ultraviolet-induced bleaching of light-grown cells of Euglena gracilis were investigated. Our lightand electron-microscopic observations of the bleaching process indicate that there is a continuity of plastid structure in cells 5 generations after receiving a bleaching dose of ultraviolet light. There seems to be a continuous dilution of the plastid th...

Repair replication in replicating and non-replicating DNA after irradiation with UV light.

Ultraviolet light induces more pyrimidine dimers and more repair replication in DNA that replicates within 2 to 3 hr of irradiation than in DNA that does not replicate during this period. This difference may be due to special conformational changes in DNA and chromatin that might be associated with semiconservative DNA replication.