It changes, by the gradually increasing assumption of silicate material, first into a "lithosporic" shell—one in which silicates (especially olivine and pyroxene) are included sporadically in the metal, and then into a "ferrosporic" shell, in which gradually decreasing amounts of metal occur...
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and Pioneer Venus5,6 spacecrafts stimulated us to study the chemical composition of the subcloud atmosphere of Venus in terms of the thermochemical equilibrium calculations, comparison of typical mixing and chemical times and a rule of height-independent element mixing ratio in the absence of condensa...
The chemical composition of the middle atmosphere (composed of the troposphere, stratosphere, and mesosphere) and its changes in the 21st century are considered. The initial data were obtained from the interactive two-dimensional radiation–chemical model SOCRATES, which calculates the height profiles ...
Although fair amount of data on the levels of atmospheric pollutants, such as SO4 2-,NO3 -, NH4 +, trace elements, O3 and recently VOC’s had been generated in both eastern and western parts of the Mediterranean
3.2.1. Elemental composition Most of the metal (loid)s in vehicle exhaust particles comes from fuel combustion, lubricants and abrasion of engine components (Hao et al., 2019; Wang et al., 2003). In the particles emitted by the different vehicles under distinct driving cycles, 47 elements ...
REWAS 2022: Developing Tomorrow’s Technical Cycles Article26 May 2021 SCRREEN: Solutions for Critical Raw Materials—A European Expert Network 1Introduction Our accelerated consumption of natural resources threatens the survivability of diverse life on Earth. At the same time, the stockpiles of disca...
The Earth’s atmosphere is considered as air, in which living things live and breathe. Clean air happens to be the most important matter required by living organism for survival. Therefore, when air is contaminated, living organism is at risk of death. There are many studies available on air...
Atmospheric chemistry in Amazonia: the forest and the biomass burning emissions controlling the composition of the Amazonian atmosphere The understanding of the natural processes that regulate atmospheric composition in Amazonia is critical to the establishment of a sustainable development ... P Artaxo,LV...
The seasonal changes in ambient mass concentrations and chemical composition of fine particulate matter (PM2.5) were investigated in three locations in Pol