XLV. Chemical and electrical changes induced by ultraviolet light
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چکیده
منابع مشابه
Ultraviolet light induced changes in polyimide liquid-crystal alignment films
Ultraviolet light induced changes in polyimide liquid-crystal alignment films were investigated. Infrared, UV-visible, x-ray photoelectron spectroscopy, and electron-spin-resonance measurements indicated that bond breaking and subsequent oxidation reactions occur in polyimide films ~SE7210, OCG284, DuPont 2555 and 2540! during the broadband UV illumination in air. Mechanical rubbing has no effe...
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Cytoplasmic alterations in human epidermis irradiated with ultraviolet light have been described by light microscopy (1, 2). Pronounced changes occurred in cells of the basal and spinous layers at the peak of the erythema reaction (twenty-four to thirty hours after irradiation). At this time, cells in the spinous layer developed homogeneous, deeply staining cytoplasm and pyknosis of nuclei. Tbe...
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Procedures have been developed in this laboratory which allow the quantitation of the mutagenic effects of ultraviolet light on bacterial populations, unobscured by concomitant lethal effects. For example, large numbers of mutations can be induced in Escherichia coli strain B/r at the locus controlling high levels of streptomycin resistance by doses of ultraviolet (UV) so small that there is no...
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ژورنال
عنوان ژورنال: The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science
سال: 1906
ISSN: 1941-5982,1941-5990
DOI: 10.1080/14786440609463553