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تعداد نتایج: 16828781 فیلتر نتایج به سال:
increasing the efficiency of water use is one of the main topics of sustainable agriculture in arid and semi-arid. the use of some materials such as superabsorbent polymers increase water storage in the soil and thus reduces the water use. increase water storage in the soil to reduce the effects of drought and saline soil. in order to evaluate the effect of super absorbent polymer on survival a...
High strength low alloy steels are widely used in gas industry, so shield metal arc welding in pipelines to transport natural gas from Iran is of great importance. For experimental investigation of seam weld and integrity of girth weld, destructive and non-destructive tests are required. In this article the effects of normal heat treatment on properties of multi pass welding in different situat...
OBJECTIVES How to contain medical expenditures is a universal problem. The Japanese government has increased patient co-payments to control it. The purpose of this study is to clarify whether the increase in co-payments to 30 percent prevented patients with hypertension or diabetes mellitus from receiving necessary care in the Employee Health Insurance System. METHODS The subjects were 211 pa...
From September 1982 through December 1987, 1012 patients were treated with intravenous streptokinase within 6 hours of acute myocardial infarction. Most of them (816/1012, 81 percent) were treated in community hospitals by primary care physicians. The remaining 196 (19 percent) were treated in the referral center, usually by a cardiologist. Cardiac catheterization within 2 days showed an open i...
A total of 487samples (77 and 410 of poultry feed ingredients and poultry feed, respectively) received from various parts of the country were analysed for detection of Aflatoxin B1 (AFB1). Overall incidence of AFB1 in feed ingredients was 60 percent. The average contamination and maximum levels of AFB1 were 37.62 and 56 g/kg, respectively, whereas, the incidence in poultry feed samples was 44....
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