نتایج جستجو برای: nrc
تعداد نتایج: 2516 فیلتر نتایج به سال:
We report the complete sequence of an extreme halophile, Halobacterium sp. NRC-1, harboring a dynamic 2,571,010-bp genome containing 91 insertion sequences representing 12 families and organized into a large chromosome and 2 related minichromosomes. The Halobacterium NRC-1 genome codes for 2,630 predicted proteins, 36% of which are unrelated to any previously reported. Analysis of the genome se...
Abstract What if you could tune the temperature of fixed point used to calibrate your thermometer continuously between freezing points zinc (692.677 K) and silver (1234.93 while maintaining uniform environment (±10 mK) along 20 cm zone for hours at a time with an uncertainty approaching fraction mK? We are aiming do exactly that by using set caesium- sodium-filled pressure controlled heat pipes...
به منظور بررسی اثر نوع منبع و سطح کلسیم جیره غذایی و اندازه ذرات سنگ آهک بر ویژگی های تولیدی و سختی استخوان درشت نی، آزمایشی با استفاده از 384 قطعه جوجه گوشتی انجام گرفت. جوجه ها تا هفت روزگی با یک جیره آغازین تجارتی تغذیه، و سپس به طور تصادفی به 64 گروه شش قطعه ای تقسیم شدند، به گونه ای که از نظر میانگین وزن بدن میان گروه ها اختلاف معنی داری وجود نداشت (4/5± 2/82 گرم). از روز هشتم تیمارهای آزم...
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consumption of fish has been associated with reduced performance on tests of neurologic function in children, including tests of cogni-tive development, attention and behavior, and motor skills. A comprehensive review of the mercury literature conducted by the National Research Council (NRC) Committee on the Toxicological Effects of Methylmercury concluded that, based on the evidence available,...
This review assessed the relationships between dietary energy density and animal performance in an effort to evaluate a possible upper limit for energy density in finishing diets for cattle. Data were combined from 49 experiments (69 trials; 243 treatment observations) in which the dietary ME concentration (Mcal/kg of DM) was varied by level of concentrate, grain source, grain processing, and l...
need to prepare an environmental impact statement. Document Access and Management System (ADAMS), which provides text and image files of NRC's public documents. The ADAMS accession numbers for the documents related to this notice are as follows: Document ADAMS accession No. If you do not have access to ADAMS or if there are problems in accessing the documents located in ADAMS, contact the NRC's...
The optokinetic reflex (OKR) is a basic visual reflex exhibited by most vertebrates and plays an important role in stabilizing the eye relative to the visual scene. However, the OKR requires that an animal detect moving stripes and it is possible that fish that fail to exhibit an OKR may not be completely blind. One zebrafish mutant, the no optokinetic response c (nrc) has no OKR under any ligh...
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