Ultraviolet (UV) irradiation or exposure to sunlight are well known but poorly understood predisposing factors of systemic lupus erythematosus (SLE) (Dubois, 1966; Freeman, Knox, and Owens, 1969). It appears from the published literature, that little attention has been paid to what actually occurs when apparently healthy individuals are exposed to UV irradiation. On a molecular level, UV irradi...

Abstract Many plant-dwelling mites reside on lower leaf surfaces. The biological impact of solar ultraviolet-B (UV-B) radiation spider has been demonstrated over the last decade. Due to serious problem acaricide resistance in mites, development alternative control methods and establishment an integrated pest management (IPM) strategy are urgently needed, especially for greenhouse horticultural ...

The lethal effect of ultraviolet light, k 254 m/z, on Esckerichia toll, Streptomyces griseus, and other microorganisms can be largely prevented if following ultraviolet irradiation the cells are exposed to visible and near-ultraviolet light in the vicinity of 400 m~ (Kelner, 1949 a, 1949 b, 1950). Such light-induced recovery (or pkotoreactivation, pkotore~ersal, or pkotorecwoery) has been confi...

DAMAGE IN DNA AFTER IRRADIATION CAN BE CLASSIFIED INTO FIVE KINDS: base damage, single-strand breaks, double-strand breaks, DNA-DNA cross-linking, and DNA-protein cross-linking. Of these, repair of base damage is the best understood. In eukaryotes, at least three repair systems are known that can deal with base damage: photoreactivation, excision repair, and post-replication repair. Photoreacti...

Zelle and Hollaender (1955) summarized data from several sources which showed that spores of aerobic bacilli are usually about twice as resistant to killing by ultraviolet light as are vegetative cells of the same species. Recently Stuy (1956) showed that spores of Bacillus cereus are many times more resistant than their vegetative cells. In seeking an explanation for the discrepancies in these...