Results 321 to 330 of about 7,837,864 (382)
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AJN, American Journal of Nursing, 1933
physicists have helped to increase our knowledge of the nature of light. Still, even today, we do not know exactly what light is. Many different theories are held. One of the most recent, and that which well explains the action of ultraviolet on the body, is as follows. Light is composed of billions of light particles. These light particles are so tiny
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physicists have helped to increase our knowledge of the nature of light. Still, even today, we do not know exactly what light is. Many different theories are held. One of the most recent, and that which well explains the action of ultraviolet on the body, is as follows. Light is composed of billions of light particles. These light particles are so tiny
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The Sun, Sun Myths, and Sun Worship
1976Most of us take the sun for granted. We know it to be a heavenly body subject to the same laws of physics that govern events on earth. For example, we know that the earth’s axis is not vertical to the earth’s orbit around the sun; that the resultant oblique angles at which the sun’s rays strike the earth cause seasonal variation in radiation (as Figure
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Science, 2016
A fusion research program nurtured in isolation could blossom as Iran joins the ITER megaproject.
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A fusion research program nurtured in isolation could blossom as Iran joins the ITER megaproject.
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IEEE Std 802.15.4aa?2022 (Amendment to IEEE Std 802.15.4?2020 as amended by IEEE Std 802.15.4z?2020, IEEE Std 802.15.4w?2020, and IEEE Std 802.15.4y?2021), 2022
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Sun Exposure and Melanomas on Sun-Shielded and Sun-Exposed Body Areas
2014Malignant melanoma is a tumor that arises from melanocytes and accounts for around 4% of all malignancies in Europe and Northern America and for about 11% in Australia and New Zealand. About 10% of primary melanomas arise from sites not exposed to sun. Acral lentiginous melanoma, mucosal melanoma (in the oral cavities, nasal sinuses, genital tract and ...
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Diogenes, 2003
It is more than a century since what we call the ‘history of religions’ was discovered and has been studied. But only recently have we realized that the ‘geography of religions’ is just as important. East and West are essential geopolitical categories, determined by cultural, historical and even religious differences: an Indian and a Swedish Catholic ...
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It is more than a century since what we call the ‘history of religions’ was discovered and has been studied. But only recently have we realized that the ‘geography of religions’ is just as important. East and West are essential geopolitical categories, determined by cultural, historical and even religious differences: an Indian and a Swedish Catholic ...
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Sun Exposure, Sun Protection, and Vitamin D
JAMA, 2005Objectives: To examine during what behaviors people apply sunscreen and to assess the relationship to UV exposure monitored by personal dosimetry and diaries.Design: Open prospective observational study.Setting: University hospital.Participants: A convenience sample of 340 Danish volunteers: children, adolescents, indoor workers, sun worshippers ...
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Ugeskrift for laeger, 1994
Protection against the sun in Denmark is only necessary from mid April to September. The number of erythema units may reach about 16 per day in the summer sun and about 50% of the biological active radiation is found between 12 a.m. and 3 p.m. (summertime).
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Protection against the sun in Denmark is only necessary from mid April to September. The number of erythema units may reach about 16 per day in the summer sun and about 50% of the biological active radiation is found between 12 a.m. and 3 p.m. (summertime).
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The validity and practicality of sun-reactive skin types I through VI.
Archives of Dermatology, 1988T. Fitzpatrick
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