The products of basic hydrolysis of ethyl oxal-acetate and the preparation of 3-ethoxy carbonyl pyruvic acid 1 are reported.Esterification reaction of 1 with unhindered alcohols could be carried out smoothly, but it w...The products of basic hydrolysis of ethyl oxal-acetate and the preparation of 3-ethoxy carbonyl pyruvic acid 1 are reported.Esterification reaction of 1 with unhindered alcohols could be carried out smoothly, but it was unsuccessful with hindered alcohols.展开更多
The practical condition of needle-punched filters applied in coal-fired power plants is investigated. According to the actual operating conditions, two common filters (glass fiber filter and polyphenylene sulfide (PPS...The practical condition of needle-punched filters applied in coal-fired power plants is investigated. According to the actual operating conditions, two common filters (glass fiber filter and polyphenylene sulfide (PPS) filter) are selected for experiment. The performance of these two kinds of filter is compared based on a series of tests such as resistance to the acid and alkali, oxidation resistance,hydrolysis resistance,and wear resistance. Experimental results show that PPS filter materials have better properties than those of glass filter material except oxidation resistance. Composite filter mixed glass fiber and PPS is recommended for polluters because of its good properties in all aspects.展开更多
The phytochemical investigation of the stems of Homalium stenophyllum afforded seven new phenolic glycosides(1-5 and 8-9)and two known compounds(6 and 7).Their structures were elucidated by comprehensive analyses of N...The phytochemical investigation of the stems of Homalium stenophyllum afforded seven new phenolic glycosides(1-5 and 8-9)and two known compounds(6 and 7).Their structures were elucidated by comprehensive analyses of NMR spectroscopic,mass spectrometric data and chemical hydrolysis.Additionally,their anti-inflammatory activities against the NO production in LPS-induced macrophages were evaluated.展开更多
文摘The products of basic hydrolysis of ethyl oxal-acetate and the preparation of 3-ethoxy carbonyl pyruvic acid 1 are reported.Esterification reaction of 1 with unhindered alcohols could be carried out smoothly, but it was unsuccessful with hindered alcohols.
文摘The practical condition of needle-punched filters applied in coal-fired power plants is investigated. According to the actual operating conditions, two common filters (glass fiber filter and polyphenylene sulfide (PPS) filter) are selected for experiment. The performance of these two kinds of filter is compared based on a series of tests such as resistance to the acid and alkali, oxidation resistance,hydrolysis resistance,and wear resistance. Experimental results show that PPS filter materials have better properties than those of glass filter material except oxidation resistance. Composite filter mixed glass fiber and PPS is recommended for polluters because of its good properties in all aspects.
基金supported by the National Natural Science Foundation of China(Nos.21362009,81360478 and 21302181)International S&T cooperation Program of China(ISTCP)(No.2014DFA40850)Hainan Special Project for TCM Modernization(No.2015ZY19)。
文摘The phytochemical investigation of the stems of Homalium stenophyllum afforded seven new phenolic glycosides(1-5 and 8-9)and two known compounds(6 and 7).Their structures were elucidated by comprehensive analyses of NMR spectroscopic,mass spectrometric data and chemical hydrolysis.Additionally,their anti-inflammatory activities against the NO production in LPS-induced macrophages were evaluated.
