منابع مشابه
Spectrophotometric determination of arsenic in water samples based on micro particle formation of ethyl violet-molybdoarsenate.
In this study, a simple and sensitive method for the determination of arsenic in water samples was developed. The method is based on the formation of micro particles of Ethyl Violet and molybdoarsenate, which gives an apparently homogeneous blue color to the solution. The absorption of the excess dye gradually decreases due to its conversion to a colorless carbinol species under strongly acidic...
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Arsenic toxicity is a global health problem affecting many millions of people. The main source of exposure is drinking water contaminated by natural geological sources. Current risk assessment is based on the recognized carcinogenicity of arsenic, but neurotoxic risks have been overlooked. In 1955, an outbreak of arsenic poisoning occurred among Japanese infants, with more than 100 deaths. The ...
متن کاملUltra-violet Finiteness in Noncommutative Supersymmetric Theories
We consider the ultraviolet divergence structure of general noncommutative super-symmetric U (N c) gauge theories, and seek theories which are all-orders finite. September 2001
متن کاملArsenic and Arsenic Compounds
Arsenic (atomic number, 33; relative atomic mass, 74.92) has chemical and physical properties intermediate between a metal and a nonmetal, and is often referred to as a metalloid or semi-metal. It belongs to Group VA of the Periodic Table, and can exist in four oxidation states: –3, 0, +3, and +5. Arsenite, AsIII, and arsenate, AsV, are the predominant oxidation states under, respectively, redu...
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The normal skin is from 0.5 to 10 millimetres thick, varying from place to place in the body, and consists of two layers, the epidermis and the dermis. The more superficial layer of the skin is the avascular epidermis which consists of stratified epithelium accurately moulded on the papillae of the corium , or true skinThe lowest or the deepest layer of the epidermis is known as the basal layer...
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ژورنال
عنوان ژورنال: The Lancet
سال: 1878
ISSN: 0140-6736
DOI: 10.1016/s0140-6736(02)43800-7