منابع مشابه
Effects of Aluminum, Silicon And Ferro Silicon Anti Oxidants in MgO C Refractories
Three different materials (aluminum, ferro -silicon and silicon) were used as antioxidants in order to prevent the decarburization process and to keep and/or increase the final properties in MgO-C refractories. Their effects were compared by measuring the physical and mechanical properties as well as oxidation and the resultant phases and microstructures, in the temperature range of 200-1600 ...
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Deep fear of nuclear radiation is widespread, yet research on radiation’s biological effects finds that the level of alarm far exceeds the actual danger. This “radiophobia” has roots in the fear of nuclear weapons, but has been significantly reinforced and inflamed by accidents at nuclear power plants. Radiophobia does far more harm to human health than the radiation released by nuclear acciden...
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Transcription is obviously essential, but even a good thing can be dangerous at times. In this issue, Lin et al. (2009) provide evidence that binding of the transcription machinery may predispose genome regions to breakage and translocations that may lead to cancer.
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Humans often alter their behavior depending on the opponent’s group membership, with positive (e.g., support of same-group members) or negative (e.g., stereotyping, oppression, genocide) consequences. An influential model developed by Hammond and Axelrod highlighted the emergence of macro-level “ethnocentric cooperation” from the aggregation of micro-level interactions based on arbitrary tags s...
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ژورنال
عنوان ژورنال: Nature
سال: 1910
ISSN: 0028-0836,1476-4687
DOI: 10.1038/084053b0