SIMPLE AND ETHEREAL SULPHATES.
نویسندگان
چکیده
منابع مشابه
202 Studies in Detoxication 43 . A STUDY OF THE ARYLSULPHATASE ACTIVITY OF TAKADIASTASE TOWARDS SOME PHENOLIC ETHEREAL SULPHATES
Several types of sulphatases occur in nature. These are distinguished by the nature of the ester group found in the ethereal sulphates which they hydrolyse (Fromageot, 1950). Takadiastase, a commercial preparation of Aspergillus oryzae, possesses arylsulphatase (phenolsulphatase) activity (Neuberg & Kurono, 1923), for it hydrolyses phenolic monoesters of sulphuric acid but has no action on alip...
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Poorlyand well-crystallized efflorescent sulphates sequences beginning with the simple hydrated salts from divalent to trivalent cations are described in acid mine drainage (AMD) elsewhere (Alpers et al., 1994; Nordstrom, 1999; Nordstrom and Alpers, 1999; Buckby et al., 2003; Romero et al., 2006; among others). Weathering of pyrite and pyrrothite produces acidity and Fe, followed by precipitati...
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In their essay in the April 2004 issue of PLoS Biology, Elizabeth Blackburn and Janet Rowley (2004), two distinguished cellular biologists and members of the President’s Council on Bioethics, strongly question the scientifi c foundation of two reports from the Council (President’s Council on Bioethics 2003, 2004). The Council on Bioethics was formed by executive order “to advise the President o...
متن کاملHydration Modeling of Calcium Sulphates
The CEMHYD3D model has been extended at the University of Twente in the last ten years [1,2]. At present the cement hydration model is extended for the use of gypsum. Although gypsum was present in the model already, the model was not suitable for high contents of gypsum and did not include the transitions between the different calcium sulphate phases (anhydrite, hemihydrate and gypsum). Beside...
متن کاملHydration modelling of Calcium Sulphates
The CEMHYD3D model has been extended at the University of Twente in last ten years. At present the cement hydration model is extended for the use of gypsum. Although gypsum was present in the model already, the model was not suitable for high contents of gypsum and did not include the transitions between the different calcium sulphate phases (anhydrite, hemihydrate and gypsum). Besides that gyp...
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ژورنال
عنوان ژورنال: Journal of the American Medical Association
سال: 1900
ISSN: 0002-9955
DOI: 10.1001/jama.1900.24610130020001g