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تعداد نتایج: 10447820 فیلتر نتایج به سال:
fluorescence chemical sensors for the highly sensitive and selective determination of pb2+ , hg2+, co2+ and fe3+ ions in aqueous solutions are described. the ion sensing system was prepared by incorporating lipophilic ligand (l) as a neutral ion-selective fluoroionophore in the plasticized pvc membrane containing sodium tetraphenylborate or potasium tetrakis (p-chlorophenyl) borate as a liphoph...
Background—Stroke occurs concurrently with myocardial infarction (MI) in '30 000 US patients each year. This number is expected to rise with the increasing use of thrombolytic therapy for MI. However, no data exist for the economic effect of stroke in the setting of acute MI (AMI). The purpose of this prospective study was to assess the effect of stroke on medical resource use and costs in AMI ...
abstract this study aimed at investigating the possible relationship between self-assessment in writing and self-regulation of iranian efl learners. the main purpose of the study was not only to report and inform about this relationship, but also to investigate and find practical outcomes of the incorporation of self-assessment in writing, such as improving writing skill. the research was carr...
Abstract Introduction Sexuality is complex and multifaceted, broadly composed of psychological, physiological, interpersonal, identity, social/political phenomena. The term “sexuality” used inconsistently in the literature, both how it defined by researchers measured. Some define sexuality a narrow, heteronormative, genital-focused way that negates subjective experiences individuals, turn, affe...
introduction: the aim of this study was to evaluate the influenceof different light curing systems and curing times on the micro-hardness of aresin modified glass ionomer. methods: forty two samples of resinmodified glass ionomer (rmgi) were prepared using stainless steel cylindrical mold(8 × 2 mm) and randomly divided into six groups of seven. three groups werecured with a quartz tungsten halo...
Animal production has moved quite rapidly to a consolidated structure of fewer, larger farms, ranches, and animal feeding units in both developed and developing countries. Driven by economies of scale arising from steady advances in technology, the trend shows no sign of slowing. This new structural concept and features increased concentration of large-scale livestock and specialty crop product...
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