共查询到20条相似文献，搜索用时 31 毫秒
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Stone R 《Science (New York, N.Y.)》2008,321(5886):184-185
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Albania is facing serious problems with the national food safety control system in terms of legislation, control and enforce-ment. The objective of this paper is to analyse consumer perceptions about s... 相似文献
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ical Safety Technology4 13-15X937B02647B;B026_47赵恩乾;6-8 55浅谈企业安全生产应如何做到以人为本雍信实;南京输油管理处扬子分输站 江苏南京211500安全生产;;以人为本;;安全文化从理论的角度 相似文献
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Schuyler AH 《Science (New York, N.Y.)》1978,201(4354):398
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Kerr RA 《Science (New York, N.Y.)》1982,217(4563):917-919
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单对基因(A,a)的自然选择 总被引：2，自引：0，他引：2
定量讨论了自然选择对单对基因的作用,校正了生态遗传学中的若干流行误解,得出了一些有现实意义的新结果.这些结果与生物进化的现实相符。 相似文献
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Xiong P Nocek JM Vura-Weis J Lockard JV Wasielewski MR Hoffman BM 《Science (New York, N.Y.)》2010,330(6007):1075-1078
Direct measurements of electron transfer (ET) within a protein-protein complex with a redesigned interface formed by physiological partner proteins myoglobin (Mb) and cytochrome b(5) (b(5)) reveal interprotein ET rates comparable to those observed within the photosynthetic reaction center. Brownian dynamics simulations show that Mb in which three surface acid residues are mutated to lysine binds b(5) in an ensemble of configurations distributed around a reactive most-probable structure. Correspondingly, charge-separation ET from a photoexcited singlet zinc porphyrin incorporated within Mb to the heme of b(5) and the follow-up charge-recombination exhibit distributed kinetics, with median rate constants, k(f)(s) = 2.1 × 10(9) second(-1) and k(b)(s) = 4.3 × 10(10) second(-1), respectively. The latter approaches that for the initial step in photosynthetic charge separation, k = 3.3 × 10(11) second(-1). 相似文献
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Walsh J 《Science (New York, N.Y.)》1980,210(4475):1230-1231
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Lawler A 《Science (New York, N.Y.)》2003,299(5609):998-1000
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Aisenberg AD 《Science (New York, N.Y.)》2005,309(5740):1491
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Lloyd I 《Science (New York, N.Y.)》2001,292(5519):1064-1065