The chemical substance that is used to make glass is ___. A. silica B. calcium carbonate C. sodium carbonate D. magnesium oxide 相关知识点: 试题来源: 解析 A。制造玻璃的化学物质是二氧化硅,即 silica。选项 B 是碳酸钙,选项 C 是碳酸钠,选项 D 是氧化镁。所以答案是 silica。反馈...
This invention isolation of the target nuclear acid which uses the substance which possesses the non improvement silica surface, regards the method for expanding the target nuclear acid under existing of the substance which possesses the non improvement silica surface which follows to that. It is ...
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This is because both porous and non-porous PDMS were formed of the same components, with the exception that sugar was used to generate pores in the porous PDMS, which was entirely leached out of the substance during the soaking times. The PDMS curve shown in this work is comparable to ...
chemical compound,compound- (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight silicone,silicone polymer- any of a large class of siloxanes that are unusually stable over a wide range of temperatures; used in lubricants and adhe...
Imaging of humic substance macromolecular structures in water and soils. Science 286, 1335–1337 (1999). Google Scholar Denton, J. K. et al. Molecular-level origin of the carboxylate head group response to divalent metal ion complexation at the air–water interface. Proc. Natl Acad. Sci. ...
PURPOSE: A fluorescent substance for a display device is provided, to improve the dispersion of a fluorescent substance layer for forming a rough layer, thereby preventing the generation of crack, and to control the particle size of silica and a pigment for controlling scattering in exposure and ...
An adsorbent is a porous substance having high surface area which can adsorb substances onto its surface by intermolecular forces. A number of materials such as silica gel, zeolites, activated carbon, and activated alumina have been extensively investigated for their use as adsorbents in water pollut...
Solubility was measured at room temperature by slurrying the solid drug substance in deionized water and pH buffers for 48 h, passing the slurry through a 0.2 µm filter, and analyzing the filtrate using LC-UV spectrometry. Solution state NMR was used to measure the chemical shift of...
Meanwhile, according to the identified structure of the substance, the corresponding components capable of reducing the presence of the substance forming grey speckles on tobacco leaves can be investigated, so as to reduce the incidence of tobacco with grey speckled leaves in the flue-curing process...