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排序方式: 共有123条查询结果,搜索用时 367 毫秒
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Alves GA Amato S Anjos JC Appel JA Astorga J Bracker SB Cremaldi LM Darling CL Dixon RL Errede D Fenker HC Gay C Green DR Halling AM Jedicke R Karchin PE Kwan S Leuking LH Mantsch PM de Mello Neto JR Metheny J Milburn RH de Miranda JM da Motta Filho H Napier A Passmore D Rafatian A dos Reis AC Ross WR Santoro AF Sheaff M Souza MH Spalding WJ Stoughton C Streetman ME Summers DJ Takach SF Wallace A Wu Z 《Physical review D: Particles and fields》1994,49(9):R4317-R4320
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Alves GA Amato S Anjos JC Appel JA Astorga J Bracker SB Cremaldi LM Dagenhart WD Darling CL Dixon RL Errede D Fenker HC Gay C Green DR Jedicke R Karchin PE Kennedy C Kwan S Lueking LH de Mello Neto JR Metheny J Milburn RH de Miranda JM da Motta Filho H Napier A Passmore D Rafatian A dos Reis AC Ross WR Santoro AF Sheaff M Souza MH Spalding WJ Stoughton C Streetman ME Summers DJ Takach SF Wallace A Wu Z 《Physical review letters》1996,77(12):2388-2391
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Alves GA Amato S Anjos JC Appel JA Bracker SB Cremaldi LM Darling CL Dixon RL Errede D Fenker HC Gay C Green DR Jedicke R Kaplan D Karchin PE Kwan S Leedom I Lueking LH Luste GJ Mantsch PM de Mello Neto JR Metheny J Milburn RH de Miranda JM da Motta Filho H Napier A Rafatian A dos Reis AC Reucroft S Ross WR Santoro AF Sheaff M Souza MH Spalding WJ Stoughton C Streetman ME Summers DJ Takach SF Wu Z 《Physical review letters》1993,70(6):722-725
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F. Drawert W. Heimann und G. Tsantalis 《Fresenius' Journal of Analytical Chemistry》1967,228(3):170-180
Zusammenfassung Durch Direktinjektion von 5–20 l verschiedener Branntweine wurden auf gaschromatographischen Trennsäulen in Verbindung mit Flammenionisationsdetektoren die Verbindungen Acetaldehyd, Essigsäure-methylester, Essigsäure-äthylester, Methanol, Butanol-2, Propanol-1, 2-Methylpropanol-1, Butanol-1, 2-Methyl-butanol-1, 3-Methyl-butanol-1 und Hexanol-1 aufgetrennt und quantitativ bestimmt. Vergleiche der Analysenzahlen zeigen, daß sich die Branntweingruppen Obstbrände, Weinbrände und Getreidebrände deutlich voneinander abgrenzen und darüber hinaus z.B. zwischen Cognacs und Weinbränden bzw. zwischen schottischen, amerikanischen und kanadischen Whiskies unterschieden werden kann.
Summary By direct injection of 5–20 l of various spirits the following compounds can be separated and determined on gas-chromatographic columns using flame-ionization detectors: acetaldehyde, methyl acetate, ethyl acetate, methanol, butanol-2, propanol-1, 2-methyl-propanol-1, butanol-1, 2-methyl-butanol-1, 3-methyl-butanol-1 and hexanol-1. A comparison of the analytical results reveals distinct differences between spirits from fruit, wine and grain. Moreover, different analytical results are obtained for cognacs and (German) brandies, and for Scotch, American and Canadian whiskies.相似文献
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Outdoor sound propagation is significantly affected by the topography (including ground characteristics) and the state of the atmosphere. The atmosphere on its part is also influenced by the topography. A sound propagation model and a flow model based on a numerical integration of the linearized Euler equations have been developed to take these interactions into account. The output of the flow model enables the calculation of the sound propagation in a three-dimensionally inhomogeneous atmosphere. Rigid, partly reflective, or fully absorptive ground can be considered. The linearized Eulerian (LE) sound propagation model has been validated by means of four different scenarios. Calculations of sound fields above rigid and grass-covered ground including a homogeneous atmosphere deviate from analytic solutions by < or = 1 dB in most parts of the computed domain. Calculations of sound propagation including wind and temperature gradients above rigid ground agree well with measured scale model data. Calculations of sound propagation over a screen including ground of finite impedance show little deviations to measured scale model data which are probably caused by an insufficient representation of the complex ground impedance. Further calculations included the effect of wind on shading by a screen. The results agree well with the measured scale model data. 相似文献
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A novel 2:1 (permethylated-beta-cyclodextrin)-fullerene conjugate has been synthesised; highly soluble in cold water with formation of aggregates, it displays a negative solubility coefficient and has a partition coefficient between octanol and water (Log P = 1.58) in the suitable range for biological studies. 相似文献
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F.J. Himpsel K. Christmann P. Heimann D.E. Eastman Peter J. Feibelman 《Surface science》1982,115(3):L159-L164
We have studied carbon-induced two-dimensional energy bands on Ru(0001) using angleresolved photoelectron spectroscopy and have compared them with ab initio calculations. We find a nearly parabolic band (bottom at EF ?9.8 eV at k∥ = 0, effective mass ~ 1.5 me) which we assign to the C 2pz valence states of a graphitic carbon overlayer. Compared to graphite, these states are bound more tightly by 2.3 eV. 相似文献