نتایج جستجو برای: trace envelope
تعداد نتایج: 105719 فیلتر نتایج به سال:
objective: considering the various evidences due to effects of trace elements on the outcome of pregnancy, we decided to assess the effect of these elements levels in maternal and cord serum on low birth weight. materials and methods: an analytical cross-sectional study was performed on 344 pregnant women in labour and their neonates in maryam, akbarabadi and vali-e-asr hospitals in tehran, ir...
hemodialysis is being implicated in the development of metabolic disturbances, as complications have been observed and the role of trace metals in their development has been questioned. in 78 renal failure patients who underwent hemodialysis, serum levels of zinc and copper were determined before and after first hemodialysis. acute and chronic renal failure patients were found to have lower ser...
in this paper we study triangularization of collections of matrices whose entries come from a finite-dimensional division ring. first, we give a generalization of guralnick's theorem to the case of finite-dimensional division rings and then we show that in this case the reduced trace function is a suitable alternative for trace function by presenting two triangularization results. the firs...
غربالگری، جداسازی و بررسی خصوصیات بیوشیمیایی آنزیم کیتیناز مقاوم به دما حاصل از باکتری های بومی کشور
کیتین n(c8h13o5n ) دومین پلیمر مهم از نظر فراوانی درجهان است. کیتین از پیش ساز فعالudp-n- acetylglucoseamine به وسیله آنزیم کیتین سینتاز، سنتز می شود. مقدار کیتین از سخت پوستان در کل محیط های دریایی 1560 میلیون تن تخمین زده شده است. اسکلت خارج سلولی سخت پوستان (پوسته خرچنگ، لابستر ومیگو) به طور متداول از اصلی ترین منابع زیستی کیتین می باشد. میکروارگانیسم ها اولین تجزیه کننده های کیتین در طبیعت ...
in scpc-dama satellite networks, the baseband rrc pulse shaping is utilized to reduce the bandwidth and inter symbol interference (isi). but the variation in carrier's envelope, which expands the spectrum and ultimately increases the bandwidth, causes isi and quadrature channel crosstalk (qcc). the goal of this paper is to introduce a method to shape baseband rrc pulses, in order to make a near...
Aperture-synthesis and single-dish (sub-) millimeter molecular-line and continuum observations reveal in great detail the envelope structure of deeply embedded young stellar objects (SMM 1 = FIRS 1, SMM 2, SMM 3, SMM 4) in the densely star-forming Serpens Molecular Cloud. SMM 1, 3, and 4 show partially resolved (>2" = 800 AU) continuum emission in the beam of the Owens Valley Millimeter Array a...
An integrated approach of reservoir characterization a field was performed using seismic attributes and petrophysical parameters for the evaluation subsurface geological features hydrocarbon potential an onshore in Niger Delta Basin. Four intervals were identified within wells based on their position stratigraphic column, correlation, which aided principle uniform horizontality, simple rule tha...
Context. Physical processes that govern the star and planet formation sequence influence chemical composition evolution of protoplanetary disks. Recent studies allude to an early start already during a disk. To understand protoplanets, we need constrain structure disks from whence they are formed. Aims. We aim determine molecular abundance young disk around TMC1A protostar on au scales in order...
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