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71.
R. Garnier L. Palfray S. Sabetay E. J. Parry und J. H. Seager 《Fresenius' Journal of Analytical Chemistry》1937,110(1-2):46
Ohne Zusammenfassung 相似文献
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There are many interesting cubic curves which arise from the geometry of the triangle. In particular, those which are invariant under the operation of isogonal conjugacy have attracted much attention, and a class of these is here investigated by a variety of methods. 相似文献
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J. Gizon B. M. Nyak J. Timr A. Gizon L. Zolnai A. J. Boston Gh.Cata-Danil J. Genevey D. T. Joss N. J. O'Brien C. M. Parry E. S. Paul D. Santos A. T. Semple A. V. Afanasjev I. Ragnarsson 《Physics letters. [Part B]》1997,410(2-4):95-102
The level structure of 102Pd has been investigated using data collected with the Eurogam 2 array. Several cascades of γ-rays have been established up to high spins. Termination of rotational bands has been observed at Iπ = 28− and 32+, and tentatively at Iπ = 38+ and 42+. The nucleus 102Pd is the first case where rotational bands built on valence space configurations are followed from spin close to zero up to termination and, at higher spins, a smooth rotational band which appears to terminate is built on core excited configurations. 相似文献
75.
Partially purified cell-free extracts of the aristeromycin producer Streptomyces citricolor have been shown to catalyze the NADPH-dependent reduction of neplanocin A to aristeromycin. Stereochemical studies revealed that the reduction proceeds with anti geometry and involves transfer of the 4 pro-R hydrogen atom of NADPH to the 6′β position of aristeromycin. 相似文献
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Dimandja JM Clouden GC Colón I Focant JF Cabey WV Parry RC 《Journal of chromatography. A》2003,1019(1-2):261-272
A novel column characterization test mixture is developed for use in comprehensive two-dimensional gas chromatography (GC x GC). This mixture has been named the "Phillips mix" in honor of the late professor John B. Phillips, the father of GC x GC. The mixture comprises a series of homologous compounds from structural groups that cover a volatility and polarity range that is similar to the Grob mix, and includes saturated hydrocarbons (alkanes), unsaturated hydrocarbons (alkenes and alkynes), carbonyls (ketones and aldehydes), primary alcohols, fatty acid methyl esters, alkyl ethers, carboxylic acids, aromatics, as well as other unique functional groups (such as amines, etc.). Similarly to the Grob mix in conventional one-dimensional GC, the Phillips mix can be used as a standardized test for performance characterization of GC x GC column sets. Unlike the Grob mix, however, the Phillips mix's most important use is as a practical guideline for column users. This paper addresses some qualitative aspects of the use of the Phillips mix through an investigation of the chromatographic fingerprints of two different GC x GC column combinations. 相似文献
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