Results 261 to 270 of about 726,175 (291)
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Europe’s darker atmosphere in the UV-B
Photochemical & Photobiological Sciences, 2008Irradiation in the ultraviolet wavelength range is found to be up to 50% lower in the European summer compared to sites with comparable latitudes in New Zealand. We have developed a method to quantitatively attribute the causes for such differences between sites by analysis of spectra.
Seckmeyer Gunther +17 more
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A pH/UV-B Synergism in Amphibians
Conservation Biology, 1995Some workers have proposed that synergistic interactions may contribute to the decline and disappearance of amphibians (Blaustein & Wake 1990; Carey 1993; Blaustein et al. 1994a). In this pilot study, we tested the effects of low pH and increased ultraviolet-B radiation (UV-B) on frog-embryo survival. Blaustein et al.
Leslie E, Long +2 more
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UV‐B PHOTOTHERAPY FOR PITYRIASIS LICHENOIDES
Australasian Journal of Dermatology, 1985SUMMARYEighteen patients with long standing pityriasis lichenoides were treated with UV‐B phototherapy. Fourteen patients (82.4%) had a good response to the treatment with complete clearance in nine patients (53.0%) and more than 90% clearance in five patients (29.4%). Three patients (17.6%) did not clear but all had definite improvement.
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Ocular effects of UV-B exposure
Documenta Ophthalmologica, 1995Although an association between UV-B exposure and ocular damage has been long suspected, this relationship is still not well quantified. Cataract is the most significant ocular damage associated with UV-B exposure. Initial studies of the association between UV-B exposure and cataract were hampered by a lack of precision in the assessment of cataract ...
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Atmospheric Research, 1999
Abstract A new series of measurements including global and UV radiation was initiated in 1994 at Penang. These high quality data were used to study diurnal and seasonal variations. The mean daily total UV-B and global radiation is about 1.43×104 J and 1.77×107 J, respectively.
Mohammad Ilyas +2 more
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Abstract A new series of measurements including global and UV radiation was initiated in 1994 at Penang. These high quality data were used to study diurnal and seasonal variations. The mean daily total UV-B and global radiation is about 1.43×104 J and 1.77×107 J, respectively.
Mohammad Ilyas +2 more
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UV-B Response: When UVR8 Meets MYBs
Trends in Plant Science, 2020Although it is well known that plants respond to UV-B light, how UV-B regulates plant growth and development in an organ-specific manner remains unknown. Two recent reports by Yang et al. and Qian et al. show that the UV-B photoreceptor UVR8 interacts with different MYB transcription factors in arabidopsis (A.
Yang, Xu, Ziqiang, Zhu
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1997
One of the predicted consequences of the depletion of stratospheric ozone is an increase in the amount of ultraviolet light reaching the surface of the earth, in particular UV-B (320–280nm). Although the real effects are as yet unknown, this change in radiation could have profound consequences for plant growth and productivity. The need for information
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One of the predicted consequences of the depletion of stratospheric ozone is an increase in the amount of ultraviolet light reaching the surface of the earth, in particular UV-B (320–280nm). Although the real effects are as yet unknown, this change in radiation could have profound consequences for plant growth and productivity. The need for information
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AIP Conference Proceedings, 1992
Global UV‐B flux (sum of direct and diffuse radiations) data at four wavelengths 280, 290, 300 and 310 nm are recorded at several locations in India as part of Indian Middle Atmosphere Programme (IMAP). The stations have been selected considering distinct geographic features and possible influence of atmospheric aerosols and particulates on the ground ...
B. S. N. Prasad +2 more
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Global UV‐B flux (sum of direct and diffuse radiations) data at four wavelengths 280, 290, 300 and 310 nm are recorded at several locations in India as part of Indian Middle Atmosphere Programme (IMAP). The stations have been selected considering distinct geographic features and possible influence of atmospheric aerosols and particulates on the ground ...
B. S. N. Prasad +2 more
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1982
New physical inputs are summarized and placed in analytic forms suitable for calculations of the ultraviolet spectral irradiance reaching the ground. These include (a) recent values of the extraterrestrial solar spectral irradiance based upon the work of Heath et al.; (b) improved analytic characterizations of ozone attenuation coefficients; (c) an ...
Alex E. S. Green, P. F. Schippnick
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New physical inputs are summarized and placed in analytic forms suitable for calculations of the ultraviolet spectral irradiance reaching the ground. These include (a) recent values of the extraterrestrial solar spectral irradiance based upon the work of Heath et al.; (b) improved analytic characterizations of ozone attenuation coefficients; (c) an ...
Alex E. S. Green, P. F. Schippnick
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UV-B response of greening barley seedlings
Acta Biologica Hungarica, 2009The relationship between the greening stage of barley seedlings and their response to UV-B irradiation was studied. Etiolated barley seedlings ( Hordeum vulgare L., cv. Alfa) greened 12, 24 and 48 h were exposed to UV-B irradiation (312 nm) for 5 h.
Fedina, Ivanka +4 more
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