نتایج جستجو برای: sunshine
تعداد نتایج: 2074 فیلتر نتایج به سال:
The aim of this study is to determine the effect of environmental conditions with emphasis on the main meteorological factors (air temperature variables, sunshine hour, and humidity), on phytoplankton communities. As important primary producers in aquatic ecosystems, phytoplankton communities could be affected by several factors. Environmental factors play the major role in occurrence and diver...
Exposure to sunlight is the major cause of skin cancer. Ultraviolet radiation (UV) from the sun causes damage to DNA by direct absorption and can cause skin cell death. UV also causes production of reactive oxygen species that may interact with DNA to indirectly cause oxidative DNA damage. UV increases accumulation of p53 in skin cells, which upregulates repair genes but promotes death of irrep...
The new Physician Payments Sunshine Act requires public reporting of payments to physicians and teaching hospitals from pharmaceutical and medical device companies, as well as reporting of certain ownership interests (see box). Sponsored by Senators Charles Grassley (R-IA) and Herb Kohl (D-WI) and supported by consumer advocates, the law covers meals, honoraria, travel expenses, and grants from...
—The Editors I t was called the sunshine cure, and in the early 20th century, before the era of antibiotics, it was the only effective therapy for tuberculosis known. No one knew why it worked, just that TB patients sent to rest in sunny locales were often restored to health. The same “treatment” had been discovered in 1822 for another historic scourge, rickets—a deforming childhood condition c...
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