منابع مشابه
Biosafety standards for working with Crimean-Congo hemorrhagic fever virus.
In countries from which Crimean-Congo haemorrhagic fever (CCHF) is absent, the causative virus, CCHF virus (CCHFV), is classified as a hazard group 4 agent and handled in containment level (CL)-4. In contrast, most endemic countries out of necessity have had to perform diagnostic tests under biosafety level (BSL)-2 or -3 conditions. In particular, Turkey and several of the Balkan countries have...
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There is evidence that the National Literacy Strategy has led to a sustained increase in literacy attainment, especially in reading, although recent international comparisons also suggest some additional issues regarding pupil performance in England. The relative success of the NLS may at least partly lie in the policy application of several complementary areas of educational research, a sugges...
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Dual-use concerns – that legitimate research has the potential to be misused – are inherent in life sciences research. In the past 15 years, numerous scientific papers have raised security questions, and split opinions of scientists, ethicists, and policymakers on whether the research should have been performed or published. Some of the most high-profile examples include the addition of an immu...
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Introduction: In 2000, the American National Standards Institute (ANSI) undertook the task of drafting a “National Standards Strategy “ for the United States. The goals included identifying the challenges then facing America as it participated domestically and abroad in standard setting, devising responsive actions to be taken to meet those challenges, and designating the stakeholders best suit...
متن کاملNational Institute of Standards & Technology
This Standard Reference Material (SRM) is a primary transfer standard certified using a national reference spectrophotometer at NIST [1-3]. SRM 2930 is complementary to SRM 930e and SRM 1930, providing levels of transmittance/absorbance that extend the range covered by those SRMs. It is intended for use in the verification of the transmittance and absorbance scales of spectrophotometers in the ...
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ژورنال
عنوان ژورنال: Nature
سال: 2017
ISSN: 0028-0836,1476-4687
DOI: 10.1038/543623c