نتایج جستجو برای: plasma torche
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An atmospheric microwave plasma argon was used for the inactivation of bacteria E. coli. The employed device, called Axial Injection Torch (or TIA Torche à Axiale), consisted a power source, waveguide and gas supply system. Using this we studied effects exposure time, distance, input power, flow rate on reduction Escherichia coli cells. first part study carried out with static sample exposed to...
This article distinguishes three measures of intergenerational economic mobility that emerge when the population is divided into groups: overall individual mobility, within-group mobility, and between-group mobility. We clarify their properties and the relationship between them. We then evaluate Clark’s use of surname between-group persistence as a preferred measure of intergenerational mobilit...
terms, which capture the difference in effect of exposure in the affected region compared with the unaffected region, for each month of exposure. We see that for the ‘All births’ sample, births exposed in month 3 of gestation have significantly lower gestational age in the affected than in the unaffected region (difference: 20.228 weeks, P 1⁄4 0.022). When we compare these findings by sex of th...
در سال 1950 دانشمندان کشف کردند که اگر دهانه ی نازل هدایت کننده جریان گاز خنثی را در مشعل های جوشکاریtig ،کاهش یابد، خواص قوس به طور قابل ملاحظه ای دچار تحول می شود . کاهش یافتن دهانه ی نازل ، منجر به محدود شدن گاز و قوس الکتریکی شده و باعث افزایش سرعت و قاومت گرمایی قوس می شود .دما به طور قابل توجهی رشد می کند و تکانه گاز به علت داشتن سرعت بالا منجر به برداشته شدن حوضچه ی مذاب می شود . در این ...
It has long been recognized by obstetricians and paediatricians that babies of lower birthweight experience an increased risk of some physical and mental morbidities soon after birth and in childhood. Additionally, over the past two decades, the formulation of the ‘Developmental Origins of Health and Disease’ (Barker) hypothesis has resulted in acceptance that pre-natal influences (usually capt...
background: there are varieties of purification techniques for separation of human plasma proteins such as salting out, ion exchange chromatography, and ethanol fractionation. there are limitations for each method, for example in salting out method, the salt has to be removed in an additional step. ion exchange chromatography is difficult for scaling up, and plasma fractionation is a time consu...
thrombotic thrombocytopenic purpura is the result of multiple thrombus disseminated in small arterioles throughout the body. principle damage is in the endothelium of small vessels and capillaries. from 1982 to 1999, 28 patients (16 female and 12 male) have been treated for ttp. the outcome was evaluated for risk factors and prognosis. these patients were 18 to 69 years old. all had neurologica...
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