Results 301 to 310 of about 403,912 (359)
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Trace Metals in Neuropsychiatry
British Journal of Psychiatry, 1983Naylor's recent hypothesis that vanadium ‘poisoning’ could be a factor in the severity of manic-depressive illness drew attention to the normal and even essential presence of vanadium in the diet, and in human living tissues. The whole brain may contain only about 45 micrograms of vanadium (Underwood, 1977; 1979), as against 500 micrograms of manganese,
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1992
Publisher Summary Metals and other elements of economic interest are deposited when geochemical conditions reduce their mobility. Deposits range in quality from the nearly pure element, such as native copper, to highly disseminated deposits of marginal economic value. In addition, there are natural background levels of nearly all the elements in what
Mark M. Benjamin, Bruce D. Honeyman
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Publisher Summary Metals and other elements of economic interest are deposited when geochemical conditions reduce their mobility. Deposits range in quality from the nearly pure element, such as native copper, to highly disseminated deposits of marginal economic value. In addition, there are natural background levels of nearly all the elements in what
Mark M. Benjamin, Bruce D. Honeyman
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Chemical & Engineering News Archive, 2013
In 1905, the U.S. Pharmacopeial Convention, the nonprofit standards-setting organization known as USP, introduced a method to check for heavy metals in U.S. pharmaceuticals. More than 100 years later, drug manufacturers still use the same chemistry to determine whether the level of 10 metal impurities is acceptable in their products. Exposure to metals
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In 1905, the U.S. Pharmacopeial Convention, the nonprofit standards-setting organization known as USP, introduced a method to check for heavy metals in U.S. pharmaceuticals. More than 100 years later, drug manufacturers still use the same chemistry to determine whether the level of 10 metal impurities is acceptable in their products. Exposure to metals
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1981
There is considerable information published concerning the environmental effects of some of the toxic metals, for example, cadmium, mercury and lead, where their potency has been demonstrated to cause environmental problems. However, there is a growing need to extend our knowledge to encompass the other elements in the Periodic Table which may exhibit ...
P. J. Peterson, C. A. Girling
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There is considerable information published concerning the environmental effects of some of the toxic metals, for example, cadmium, mercury and lead, where their potency has been demonstrated to cause environmental problems. However, there is a growing need to extend our knowledge to encompass the other elements in the Periodic Table which may exhibit ...
P. J. Peterson, C. A. Girling
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Environmental Letters, 1973
Measurements using atomic absorption spectrometry have established the prescence of Pb, Hg, Cd, Zn, Cu, and Cr in shells of the oyster Crassostrea virginica in amounts considerably higher than their concentration in sea water. Preliminary comparisons of trace elements in shells from widely separated areas do not suggest large differences.
R E, Ferrell +2 more
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Measurements using atomic absorption spectrometry have established the prescence of Pb, Hg, Cd, Zn, Cu, and Cr in shells of the oyster Crassostrea virginica in amounts considerably higher than their concentration in sea water. Preliminary comparisons of trace elements in shells from widely separated areas do not suggest large differences.
R E, Ferrell +2 more
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Clinics in Geriatric Medicine, 2002
The elderly are at nutritional risk as a result of multiple physiological, social, psychological, and economic factors. Elderly persons have a higher incidence of chronic diseases and associated intake of medications that may affect nutrient utilization.
Craig J, McClain +3 more
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The elderly are at nutritional risk as a result of multiple physiological, social, psychological, and economic factors. Elderly persons have a higher incidence of chronic diseases and associated intake of medications that may affect nutrient utilization.
Craig J, McClain +3 more
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2003
The term “trace metals” is used here to include both those transition metals, which are essential for cell function and those, which do not have a known biological role but which produce toxic effects by interacting with biological systems. The metals discussed are zinc, copper, cobalt, nickel, chromium, manganese, iron and cadmium.
Niall M. Horn +2 more
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The term “trace metals” is used here to include both those transition metals, which are essential for cell function and those, which do not have a known biological role but which produce toxic effects by interacting with biological systems. The metals discussed are zinc, copper, cobalt, nickel, chromium, manganese, iron and cadmium.
Niall M. Horn +2 more
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2006
Like many other elements, natural background levels of trace elements exist in crustal rocks, such as shales, sandstones, and metamorphic and igneous rocks (Benjamin and Honeyman, 2000). In particular, the majority of trace metals are derived from igneous rocks, simply based on the relative fraction of igneous rocks in comparison with sedimentary and ...
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Like many other elements, natural background levels of trace elements exist in crustal rocks, such as shales, sandstones, and metamorphic and igneous rocks (Benjamin and Honeyman, 2000). In particular, the majority of trace metals are derived from igneous rocks, simply based on the relative fraction of igneous rocks in comparison with sedimentary and ...
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2020
Título de la revista en inglés: Reports on Polar and Marine Research The Expedition PS94 of the Research Vessel POLARSTERN to the central Arctic Ocean in 2015 / Schauer, Ursula.
González González, Aridane +1 more
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Título de la revista en inglés: Reports on Polar and Marine Research The Expedition PS94 of the Research Vessel POLARSTERN to the central Arctic Ocean in 2015 / Schauer, Ursula.
González González, Aridane +1 more
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