Ionizing Particles
Mostrando 13-16 de 16 artigos, teses e dissertações.
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13. Effects of Actinomycin D and Ultraviolet and Ionizing Radiation on Pichinde Virus
Actinomycin D (0.05 μg/ml) suppresses the synthesis of ribosomal RNA of baby hamster kidney (BHK21) cells. The production of infectious Pichinde virus was enhanced in the presence of actinomycin D, although the production of virus particles was not substantially different from cultures inoculated in the absence of the drug. By prelabeling BHK21 cells with 3
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14. Functional unit of the low density lipoprotein receptor of fibroblasts: a 100,000-dalton structure with multiple binding sites.
The low density lipoprotein (apoprotein B,E) receptors of fibroblasts bind plasma lipoproteins that contain either the B (apo-B) or E (apo-E) apoproteins. These include the low density lipoproteins (LDL) containing apo-B and certain high density lipoproteins containing apo-E (e.g., the cholesterol-induced apo-E HDLc). The same receptor binds both LDL and apo
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15. Direct evidence for the participation of gap junction-mediated intercellular communication in the transmission of damage signals from α-particle irradiated to nonirradiated cells
It has generally been considered that important biological effects of ionizing radiation arise as a direct consequence of DNA damage occurring in irradiated cells. We have examined this hypothesis by exposing cells to very low fluences of α-particles, similar to those emitted by radon gas, such that as few as 1% of the cells in a population are travers
The National Academy of Sciences.
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16. Resistivity of Spores to Ultraviolet and γ Radiation while Exposed to Ultrahigh Vacuum or at Atmospheric Pressure1
Viability studies were conducted on microbial spores subjected to ultrahigh vacuum (UHV) in the 10-9 to 10-10 torr range. After 5 to 7 days in vacuum, they were exposed to ultraviolet (UV) or to γ radiation either while still under vacuum or in the presence of dried air. Among the four test organisms subjected to UHV and ultraviolet radiation, Aspergillus n