منابع مشابه
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...
متن کاملIE evaluation: Criticisms and recommendations
We survey the evaluation methodology adopted in Information Extraction (IE), as defined in the MUC conferences and in later independent efforts applying machine learning to IE. We point out a number of problematic issues that may hamper the comparison between results obtained by different researchers. Some of them are common to other NLP tasks: e.g., the difficulty of exactly identifying the ef...
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ژورنال
عنوان ژورنال: The Lancet
سال: 1845
ISSN: 0140-6736
DOI: 10.1016/s0140-6736(02)87720-0