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91.
Michael I. Mishchenko Matthew J. Berg Christopher M. Sorensen Cornelis V.M. van der Mee 《Journal of Quantitative Spectroscopy & Radiative Transfer》2009,110(4-5):323-327
Following the recent analyses of extinction by Berg et al. [J Opt Soc Am A 2008;25:1504–1513; J Opt Soc. Am A 2008;25:1514–1520], we show that although it is possible to define and measure the extinction cross section for a single particle using a detector of light facing the incident beam, this requires certain theoretical assumptions and experimental precautions. 相似文献
92.
V. J. Harding Th. F. Nicholson G. A. Grant G. Hern C. E. Downs A. Castellani F. E. Taylor A. I. Kendall G. C. Linder D. D. van Slyke Eagle M. Somogyi A. L. Raymond J. G. Blanco Spannuth und Power Margrethe Sorensen G. Haugaard S. Fränkel C. Jellinek P. A. Levene T. Mori H. Bierry Cl. Rimington B. Lustig S. P. L. Sorensen Margrethe Høyrup W. M. Dehn K. E. Jackson D. A. Ballard und V. Boulez 《Fresenius' Journal of Analytical Chemistry》1935,101(5-6):204-214
Ohne Zusammenfassung 相似文献
93.
Adcock W Trout NA Vercoe D Taylor DK Shiner VJ Sorensen TS 《The Journal of organic chemistry》2003,68(13):5399-5402
The secondary alpha-deuterium kinetic isotope effect (alpha-kie) for the solvolysis of (Z)-5-trimethylstannyl 2-adamantyl p-bromobenzenesulfonate in 97% w/w aqueous 2,2,2-trifluoroethanol (97T) at 25 degrees C has been measured (k(H)/k(D) = 1.33). The alpha-kie is abnormally high compared to the value of 1.23 for the corresponding limiting S(N)1 solvolysis of 2-adamantyl p-bromobenzenesulfonate, which proceeds via an extended ion-pair mechanism. A novel mechanism for the solvolysis of the tin compound is proposed that accommodates not only the high alpha-kie but also the absence of internal return. 相似文献
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Cathelicidins are a family of diverse antimicrobial peptides found in granules of mammalian neutrophils. Cathelicidins are active against a broad range of microbes in different environments. Aside from their antimicrobial activity, cathelicidins possess other biological properties including cytotoxic activity towards mammalian cells. Several studies have shown that the amino acid sequence of cathelicidins can be modified to temper undesired properties, such as hemolytic and cytotoxic activity, and at the same time maintain antimicrobial activity. These properties make cathelicidins ideal templates in combinatorial chemistry for designing de novo antimicrobial peptides for therapeutic use. However, one of the major challenges will be to screen these peptides in experimentally relevant models that reflect the environments in which the peptides should be therapeutically active. 相似文献
97.
Anita H. Lewin Jennifer B. Sorensen John A. Dustman J. Phillip Bowen 《Journal of computational chemistry》1999,20(13):1371-1378
A comparative study has been performed to evaluate the ability of a range of computational theories to predict the relative basicity and the conformations of diamine systems. Specifically, molecular mechanics (MM3), semiempirical (AM1), and ab initio (Hartree–Fock) methods have been used in the conformational analyses of unprotonated, monoprotonated, and diprotonated 3-aminotropanes, a pair of isomeric 1,3-diamines. Use of the molecular mechanics force field, with the recently determined parameter set for protonated amines, affords results that are in agreement with experimental data, when corrected for water solvent (by setting the dielectric constant to 80). Ab initio and semiempirical calculations, in contrast, give inconsistent and incorrect results. ©1999 John Wiley & Sons, Inc. J Comput Chem 20: 1371–1378, 1999 相似文献
98.
David A. Vosburg Sven Weiler Erik J. Sorensen 《Angewandte Chemie (International ed. in English)》1999,38(7):971-974
A 13-step synthesis of (±)-fumagillol ( 1 ), the direct precursor of the potent angiogenesis inhibitors TNP-470 and fumagillin, from crotonaldehyde, diethylamine, and acrolein (see the scheme) has been achieved. The synthesis features a remarkable hetero-Claisen rearrangement. Small-molecule inhibitors of angiogenesis are promising chemotherapeutic agents for the treatment of cancer and inflammatory diseases. 相似文献
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