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Trace metal

About: Trace metal is a research topic. Over the lifetime, 5125 publications have been published within this topic receiving 181046 citations.


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Journal ArticleDOI
TL;DR: In this paper, the combined data on trace metal concentrations in bottom sediments, particulate matter and in solution within and outside the estuary suggest that the Rhine estuary acts as a sink for particulate trace metals.

79 citations

Journal ArticleDOI
14 Dec 1963-BMJ
TL;DR: A total of 267 hospital in-patients were examined for splinter haemorrhages and 19.1% were found to occur more often in those patients whose occupations or activities exposed their hands to frequent trauma.
Abstract: A total of 267 hospital in-patients were examined for splinter haemorrhages. These were present in 51 (19.1 %). They were found to occur more often in those patients whose occupations or activities exposed their hands to frequent trauma. They were also found more often in those patients who had recently been admitted to hospital, their incidence tending to decrease with increasing length of duration in hospital. It is suggested that they may be traumatic in origin. Other details which were recorded-namely, age, sex, temperature, blood-pressure, capillary fragility, and haematuria-were apparently irrelevant. We wish to acknowledge our gratitude to Dr. A. Bloom and Dr. T. Norris, of the Whittington Hospital, and Dr H. Joules, of the Central Middlesex Hospital, for permission to examine patients. We also wish to thank Dr. I. Sutherland and Dr. R. Doll, of the M.R.C. Statistical Research Unit, and Dr. N. G. Hulbert, of the West End Hospital, for reading the paper and offering valuable suggestions. Mrs. I. M. Prentice prepared the Chart. REFERENCES Bramwell, C., and King, J. T. (1942): Principles and Practice of Cardiology. p. 386. Oxford Univ. Press, London. Horder, T. (1920). Brit. med J., 2. 301. Lewis, T. (1942). Diseases of the Heart, 3rd ed., p. 89. Macmillan, London. Platts, M. M., and Greaves, M. S. (1958). Brit. med. J.. 2, 143. White, P. D. (1947). Heart Disease, 3rd ed., p. 360. New York. Wood, P. H. (1956). Diseases of the Heart and Circulation, 2nd ed., p. 648. Eyre and Spottiswoode, London.

79 citations

Journal ArticleDOI
TL;DR: The influence of trace metal pollution on the community structure of soft bottom molluscs was investigated in intertidal areas of the Dar es Salaam coast and showed that the gastropods Acteon fortis, Assiminea ovata, and Littoraria aberrans, were negatively affected by As.

79 citations

Journal ArticleDOI
TL;DR: Overall, simultaneous measurement of macroelements and trace metals coupled with non-linear analysis provide a new perspective for revealing the underlying mechanism of trace metal bioavailability and bioaccumulation in marine organisms.

79 citations

Journal Article
TL;DR: Study of trace metal con centrations in the area of the outfalls of major discharges in Southern California found that the average enrichment ratios range from as high as 70 for mercury to almost unity for iron, manganese, and nickel, and the ratios of other trace metals were scattered in between.
Abstract: were determined on a dry weight basis. These were in turn compared with par ticulates from many natural rivers, urban ized storm drainage, and background nat ural sediment to provide quantitative data for evaluating the possible ecological con sequences of various discharges. Galloway3 studied the trace metal con centrations in the area of the outfalls of major discharges in Southern California and found that the average enrichment ratios (the concentration factors relative to the natural concentration of the metal in the sediment for each outfall region) range from as high as 70 for mercury to almost unity for iron, manganese, and nickel. The ratios of other trace metals were scattered in between. These concen trations are not excessively high in com parison with the several hundred enrich ment factors in manganese modules 4 and, to a lesser degree, with the enrichment fac tor of the organic-rich continental shelf.5 Changes are known to occur in the trace metal contents of suspended particulates when they enter the ocean; thus the con centrations in dry weight residues will provide the upper limit of the trace metal contents around the outfall. Because some of the trace metals associated with par ticulates may desorb in the presence of the high concentration of chloride ion in sea water, the actual enrichment factor might well be below that predicted from the determinations of discharge residues.

78 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202394
2022225
2021197
2020220
2019193
2018186