نتایج جستجو برای: bf3 detector

تعداد نتایج: 59041  

Journal: :caspian journal of environmental sciences 2010
m. vahabi moghaddam a. sadremomtaz

natural radionuclides present in soil as well as certain anthropogenic radionuclides released to the environment are the major contributors to terrestrial outdoor exposures. in the assessment of human exposures from environmental radioactivity, besides the conventional method of soil and vegetation sampling combined with laboratory based analyses of environmental media, the other choice would b...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه یزد - پژوهشکده علوم پایه کاربردی 1393

جفت شدن آلدهیدها با ارتوآمینوفنول و حلقه زایی ارتوهیدروکسی آریلیدین آنیلین ها یا بازهای شیف فنولی دو روش کلاسیک برای تهیه بنزواکسازول می باشد. در این کار nano-?-al2o3/bf3-nرا به عنوان یک اسید جامد تهیه نمودیم که برای اثبات وجود اتم b در nano-?-al2o3 طیف های xrd, ft-ir نانو گاما آلومینا و نانوگاما آلومینا بورتری فلورید را به طور جداگانه بررسی نمودیم. در این کار تحقیقاتی مشتقات 2-هیدروکسی آریل-...

2009
Qi Sun Sutang Cai Blake R. Peterson

Derivatives of 3 -amino-5-cholestene (3 -cholesterylamine) are of substantial interest as cellular probes and have potential medicinal applications. However, existing syntheses of 3 -amino-5-cholestene are of limited preparative utility. We report here a practical method for the stereoselective preparation of 3 -amino-5-cholestene, 3 -chloro-5-cholestene, 3 -bromo-5-cholestene, and 3 -iodo-5-ch...

Journal: :رادار 0
محمد صادقی وحید طباطباوکیلی

in this paper, the detector of moving target in mimo radar with widely separated antenna in the presence of α-stable clutter is proposed. due to the complexity of unknown parameter estimation in the presence of target, the rao test is applied. the α-stable model is a general model that can applied to different environments with appropriate selection of parameters. the problem with this model is...

رحمانی, خالید, شیرانی, احمد, معینی‌فر, مسعود,

One important factor in using an High Purity Germanium (HPGe) detector is its efficiency that highly depends on the geometry and absorption factors, so that when the configuration of source-detector geometry is changed, the detector efficiency must be re-measured. The best way of determining the efficiency of a detector is measuring the efficiency of standard sources. But considering the fact t...

Journal: :Forensic sciences 2023

The practice of latent print analysis is comprised a visual examination and the comparison fingerprint pattern from questioned to an exemplar(s). When either smudged or contains little detail, would be considered inconclusive determination. However, in these scenarios, residues (LPRs) could provide associative information supplement current ACE-V (Analysis, Comparison, Examination-Verification)...

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