نتایج جستجو برای: 522 bc
تعداد نتایج: 19378 فیلتر نتایج به سال:
A combined experimental and Density functional theory (DFT) B3LYP/6-311+G* study on the IR spectra of four stable isomers of 2-N,N-dimethylaminecyclohexyl 1-N’,N’-dimethylcarbamate was performed. Our theoretical calculations reveal that two new isomers of this compound exist and may be more stable than the known isomers. In addition the entropy, heat capacity, and the enthalpy content of the st...
A study was conducted to appraise the effect of different stocking densities on three male morphotypes named blue claw (BC), orange claw (OC) and small male (SM) at harvest in all-male culture and to assess the growth performance of BC, OC and SM in each isolated culture. Trials involving three stocking densities of all-male prawn viz., 20, 30 and 40 juvenile m-2 were carried out in...
زمینه و هدف: فرم‌آلدئید یکی از ترکیبات آلی فرّار سمی است که حذف آن از هوای آلوده ضروری است. یکی از فن‌آوری‌های موجود برای حذف این ترکیب، تجزیه فتوکاتالیستی است. این مطالعه با هدف تعیین تأثیر ترکیب نانوذرات اکسید روی (ZnO) با خاکستر استخوان (BC) بر حذف فتوکاتالیستی گاز فرم‌آلدئید صورت گرفت. روش بررسی: در این مطالعه تجربی، ویژگی‌های کاتالیست‌های تولیدشده با تعیین سطح ویژه به روش BET و بررسی‌های تص...
The Big Bang-Big Crunch (BB–BC) method is a relatively new meta-heuristic algorithm which inspired by one of the theories of the evolution of universe. In the BB–BC optimization algorithm, firstly random points are produced in the Big Bang phase then these points are shrunk to a single representative point via a center of mass or minimal cost approach in the Big Crunch phase. In this paper, the...
Background and Objectives: Reproductive factors are in close relationship with breast carcinogenesis. This matched case-control study was conducted to study the association of reproductive risk factors with the risk of breast cancer (BC) among women in Tehran and northwest of Iran. Methods: This hospital-based case-control study was performed on a total of 432 patients diagnosed with BC with...
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