منابع مشابه
[ . the Effect of Monochromatic Ultra - Violet Light upon Vaccine Virus
I t has been known for many years tha t ul tra-violet light is bactericidal. Finsen and Dreyer (1), in 1903, were probably the first to Show tha t light with short wave-lengths is virucidal also. More recent ly (2-7) other reports have appeared dealing with the effects of ul tra-violet irradiation upon bacteria, viruses, and enzymes. For the most par t , however, single wave-lengths have not be...
متن کاملThe Abiotic Action of Ultra-violet Light
Typhoid bacilli are about one two-hundredth as sensitive to ultraviolet light of wave-lengths 2100 to 2800 Angström units as is the photographic plate. This sensitivity then falls off, decreasing rapidly to almost zero sensitivity at about 2970, the beginning of the sun's spectrum.
متن کاملthe washback effect of discretepoint vs. integrative tests on the retention of content in knowledge tests
در این پایان نامه تاثیر دو نوع تست جزیی نگر و کلی نگر بر به یادسپاری محتوا ارزیابی شده که نتایج نشان دهندهکارایی تستهای کلی نگر بیشتر از سایر آزمونها است
15 صفحه اولThe Effect on the External Parathyroid Glands of the Exposure of Rabbits to Ultra-violet Light
Because many instances have been observed of the effects of light on metabolic processes, and because in the higher animals tbe glands of internal secretion act in part as chemical regulators of metabolism, we are undertaking certain studies on the effects on the endocrine tissues of exposure of the skin to ultra-violet light. In preparation for these studies it seemed desirable to make prelimi...
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cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...
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ژورنال
عنوان ژورنال: Monthly Weather Review
سال: 1915
ISSN: 0027-0644,1520-0493
DOI: 10.1175/1520-0493(1915)43<502a:eoulot>2.0.co;2