Medical Facts

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Selenium in biology: facts and medical perspectives.

Several decades after the discovery of selenium as an essential trace element in vertebrates approximately 20 eukaryotic and more than 15 prokaryotic selenoproteins containing the 21st proteinogenic amino acid, selenocysteine, have been identified, partially characterized or cloned from several species. Many of these proteins are involved in redox reactions with selenocysteine acting as an esse...

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Juries in medical malpractice trials are viewed as incompetent, antidoctor, irresponsible in awarding damages to patients, and casting a threatening shadow over the settlement process. Several decades of systematic empirical research yields little support for these claims. This article summarizes those findings. Doctors win about three cases of four that go to trial. Juries are skeptical about ...

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Brute Facts, Social Facts, and Institutional Facts

Geographic regions (henceforth, regions for short) are spatially extended pieces of (near) earth surface that share some aspect of similarity across their extents. The most fundamental aspect of similarity shared within a region is "locational similarity"-proximity. But regions nearly always share common thematic content or activity too. That is, regions are defined not just spatially but accor...

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ژورنال

عنوان ژورنال: Nature

سال: 1967

ISSN: 0028-0836,1476-4687

DOI: 10.1038/214853c0