排序方式: 共有4条查询结果,搜索用时 0 毫秒
1
1.
R. L. Aggarwal S. Di Cecca L. W. Farrar T. H. Jeys 《Journal of Raman spectroscopy : JRS》2014,45(8):677-679
Early warning of the presence of chemical agent aerosols is an important component in the defense against such agents. A Raman spectrometer has been constructed for the purpose of detecting and identifying chemical aerosols. We report the detection and identification of a low‐concentration chemical aerosol in atmospheric air using 532‐nm continuous wave laser Raman scattering. We have demonstrated the Raman scattering detection and identification of an aerosol of isovanillin of mass concentration of 1.8 ng/cm3 with a signal‐to‐noise ratio of about 19 in 30 s for the 1116‐cm−1 mode with a Raman cross section of 3.3 × 10−28 cm2 using 8‐W double‐pass laser power. Copyright © 2014 John Wiley & Sons, Ltd. 相似文献
2.
3.
Yu. V. Shklyaev T. S Vshivkova A. G. Tolstikov 《Chemistry of Heterocyclic Compounds》2009,45(3):341-344
When treated with cyanoacetic ester in conc. H2SO4 1-(4-hydroxy-3-methoxyphenyl)- and 1-(3-hydroxy-4-methoxyphenyl)-2-methylpropan-1-ol form ethyl 7-hydroxy-6-methoxy-3,3-dimethyl(or
6-hydroxy-7-methoxy- 3,3-dimethyl)-1,2,3,4-tetrahydroisoquinolylidene-1-acetate.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 421-425, March, 2009. 相似文献
4.
Synthesis and Structural Characterization of [(C_2H_5)_4N][V~((V))O_2(OC_6H_3(OCH_3)CHNNCSNH_2)]·H_2O 总被引:1,自引:1,他引:0
1 INTRODUCTIONAlthough vanadium plays an increasingly recognized role as a biometal[1~4], little is known about the structure and function of vanadium compounds in living organisms. A classical and nevertheless rapidly developing field of application for oxovanadates and related compounds is their use as catalysts in polymerization and oxidation reactions[5,6], and recent interest has focused on oxovanadates as model compounds for the interaction of oxovanadates with the active sites of en… 相似文献
1