Decongestant 发表于 2025-3-30 09:50:26
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https://doi.org/10.1007/978-3-663-04469-7gnificant worsening in the availability of heavy metals in the different sites of the Bay was observed. However, it must be emphasised that the comparison between the present results and those obtained from other works rests on a gap of at least three years. The determinations of heavy metal concentslow-wave-sleep 发表于 2025-3-30 17:34:00
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https://doi.org/10.1007/978-3-322-98501-9l concentrations of mercury were compared to sediment contents of clay-silt, organic/inorganic carbon, total hydrolyzable amino acids (THAA) and specific amino acids, total sulphur and iron. A sequential extraction was also used to clear up some questions arising from the total concentration correla制定 发表于 2025-3-31 03:02:23
Kurt Alder,Manfred Dollhausen,Max Fremeryfound in vein and placer gold deposits..During 1992 a preliminary study was undertaken, resulting in a diagnosis of problems in small scale mining in 6 gold areas (vein type) of Colombia. In order to evaluate the general impact caused to the environment due to mining activities, six gold districts lIrremediable 发表于 2025-3-31 05:05:57
https://doi.org/10.1007/978-3-663-04969-2nd levels of metals were determined by analysing sediments and soils unaffected by mining activities, located upstream of the anthropogenic inputs. The study done in Poconé focuses on Hg, Cu, Pb, Zn, Fe and Mn. In addition, the study aims to evaluate the level of contamination in sediments, soils an战胜 发表于 2025-3-31 11:02:28
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,Ultraschallwellen als optischer Verschluß, from the forest and the particulate material which is emitted to the atmosphere due to the large scale man-made burns during the dry season were studied. The samples were collected during a three year period at three different locations in the Amazon (Cuiabá, Alta Floresta and Serra do Navio), usinCollected 发表于 2025-4-1 01:11:12
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