نتایج جستجو برای: nuclear chemical analysis
تعداد نتایج: 3316381 فیلتر نتایج به سال:
To ensure the uninterrupted use of nuclear energy, the radiation protection problem of the "nuclear era" must be placed in proper perspective. Studies in the field of radiation protection span five decades, and we now have a far better understanding of the risks of ionizing radiation than of the risks of toxic chemical substances released from fossil-fuelled power stations, chemical industry an...
Dimethyl (z)-2-[(2-methyl-5-oxo-1-cyclopentyl)oxy]-2-butenedioate has been synthesized using one-pot three component reaction between N-isocyaniminotriphenylphosphorane (Ph3PNNC), 3-methylcyclopentene-1,2-dione and dimethyl acetylenedicarboxylate. Also, optimized geometry and nuclear magnetic resonance ( NMR ) of the title compound are evaluated using HF and B3LYP methods and 6-311+G(d) basis s...
Risk assessment is a standard tool in health care systems which is used to improve patient safety. Failure mode and effects analysis (FMEA) as a powerful risk assessment tool for safety and reliability widely applied by industries such as aerospace, nuclear, automotive, chemical, mechanical, medical technologies, and electronics. FMEA is popular technique, but it has some substantial deficienci...
هدف از ارایه این پایان نامه بررسی و محاسبات نوترونی و ترمو هیدرولیک برای نمونه ای از راکتور مورد استفاده در پیشرانش فضایی به روش تحلیلی و مقایسه و بهینه سازی این محاسبات با نتایج حاصل از شبیه سازی همین قلب توسط کد mcnp می باشد. برای این منظور ابتداء انواع مختلف سیستم های پیرانش هسته ای مورد استفاده در پرتابه های فضایی را مورد بررسی قرار داده و نحوه عملکرد و کارایی آن ها را با یکدیگر مقایسه می ک...
The data on average hadron multiplicities in central A+A collisions measured at CERN SPS are analysed with the ideal hadron gas model. It is shown that the full chemical equilibrium version of the model fails to describe the experimental results. The agreement of the data with the off–equilibrium version allowing for partial strangeness saturation is significantly better. The freeze–out tempera...
BCN compounds have been researched theoretically and experimentally widely. In this paper, weintroduce the theoretical prediction of ternary B-C-N compounds. NMR spectroscopy was employedextensively to study these ternary nanostructures. We discuss the utilization of chemical shiftinformation as well as ab initio calculations of nuclear shielding for H20134C9N4 structuredetermination. We calcul...
Strange particles produced in S–Au/W/Pb 200 A GeV and Pb–Pb 158 A GeV reactions are described invoking final hadronic phase space in thermal equilibrium, but allowing chemical non-equilibrium. Several sets of statistical freeze-out parameters are obtained for each system, invoking different models of dense matter. We show that only when allowing for strange and non-strange flavor abundance non-...
Nuclear spin optical rotation (NSOR) arising from the Faraday effect constitutes a novel, advantageous method for detection of nuclear magnetic resonance, provided that a distinction is seen between different chemical surroundings of magnetic nuclei. Efficient first-principles calculations for isolated water, ethanol, nitromethane, and urea molecules at standard laser wavelengths reveal a range...
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