منابع مشابه
Bright ideas for chemical biology.
Small-molecule fluorescent probes embody an essential facet of chemical biology. Although numerous compounds are known, the ensemble of fluorescent probes is based on a modest collection of modular "core" dyes. The elaboration of these dyes with diverse chemical moieties is enabling the precise interrogation of biochemical and biological systems. The importance of fluorescence-based technologie...
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Previous research has characterized insight as the product of internal processes, and has thus investigated the cognitive and motivational processes that immediately precede it. In this research, however, we investigate whether insight can be catalyzed by a cultural artifact, an external object imbued with learned meaning. Specifically, we exposed participants to an illuminating lightbulb - an ...
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Securing the right of the world’s poor to live and thrive by developing effective weapons to prevent, reduce, cure, or eliminate infectious diseases was the goal underpinning the creation of the United Nations Children’s Fund (UNICEF)/United Nations Development Program (UNDP)/World Bank/World Health Organization (WHO) Special Programme on Research and Training in Tropical Diseases (TDR) [1]. At...
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Observations suggest that nearly seventy per cent of the energy density in the universe is unclustered and exerts negative pressure. Theoretical understanding of this component (‘dark energy’), which is driving an accelerated expansion of the universe, is the problem in cosmology today. I discuss this issue with special emphasis on the cosmological constant as the possible choice for the dark e...
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ژورنال
عنوان ژورنال: Nature
سال: 1974
ISSN: 0028-0836,1476-4687
DOI: 10.1038/247331a0