منابع مشابه
A Statistical Model for the Incidence of Large Hailstones on Solar Collectors
AMtraet--A statistical model is described for estimating the risk of impacts by large hail on any ground installation (such as a solar collector array). The model is based on data for three frequency distributions: hailstone size, hailfall count (number of hailstones per m 2 per storm), and number of haildays per year. Other than parameters derived from meteorological data, the parameters of th...
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The present paper focuses on determining the most important factors affecting urban growth in large cities of Iran through modeling and comparing the common and diverse points of urban growth obtained from other studies. For this purpose, by reviewing the theoretical concepts associated with urban growth, quantities and measurable variables are developed as proper frameworks to study the influe...
متن کاملCompositional Heterogeneity of Hailstones: Atmospheric Conditions and Possible Environmental Implications
© Royal Swedish Academy of Sciences 2001 Ambio Vol. 30 No. 7, Nov. 2001 http://www.ambio.kva.se Hail is precipitation in the form of balls or irregular chunks of ice, which are usually produced by convective clouds, in association with multicell, supercell, and cold fronts. Hail begins as tiny ice pellets that collide with water droplets. As the attached droplets freeze, the pellets become larg...
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Production and purification of human growth hormone using a simple method was studied in two recombinantEscherichia coli, D7-5 and C27-2 strains. The r-hGH was expressed in the form of inclusion body in a batchfermentation process and purified to 99% purity using a procedure based on acid precipitation of the hostderived proteins and other impurities. The effect of the pH and ...
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ژورنال
عنوان ژورنال: Nature
سال: 1989
ISSN: 0028-0836,1476-4687
DOI: 10.1038/337691a0