patch-test
发表于 2025-3-21 18:29:27
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小母马
发表于 2025-3-21 20:46:39
General Introduction to the Conferencee National Science Foundation and, in particular, the Research Applications Directorate. This conference is being supported by the Foundation through an unsolicited grant to Associated Universities, Inc. from the Energy and Resources Division of the Research Applied to National Needs (RANN) Program
Endometrium
发表于 2025-3-22 03:28:59
Overview of Nitrogen Fixations somewhat over 90 years now since Hellriegel and Wilfarth clearly indicated that biological N. fixation occurs in leguminous plants. There had been earlier indications of this as evidenced by the long-accepted practice of crop rotation between leguminous and nonleguminous plants. In the 1830’s Bous
Basal-Ganglia
发表于 2025-3-22 07:52:14
Plasmids as Vectors for Gene Cloningogenic plasmid El (ColE1) or plasmids closely related to ColEl. ColE1 is a relatively low molecular weight plasmid, naturally occurring in ., that specifies the production of antibiotically active protein, colicin El, and conveys to cells harboring the plasmid immunity to this colicin. The ColE1 pla
炼油厂
发表于 2025-3-22 09:47:54
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grudging
发表于 2025-3-22 13:48:50
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grudging
发表于 2025-3-22 19:11:59
Nitrogen Fixation (NIF) Regulatory Mutants of ,: Determination of the Energy Cost of N, Fixation ,, Burns & Hardy, 1975; Winter and Burris, 1976; Zumft & Mortenson, 1975). Evidence has been presented by Hardy & Havelka (1973) that the supply of energy may often be a rate-limiting step in symbiotic N. fixation. It has, however, proved difficult to determine exactly how much energy is required. . e
合乎习俗
发表于 2025-3-23 00:49:07
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Nomogram
发表于 2025-3-23 05:15:24
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GIDDY
发表于 2025-3-23 08:39:29
The Ti-Plasmid of ,,, A Natural Vector for the Introduction of , Genes in Plants?DNA must be taken up by the recipient plant cells without drastic alterations (e.g. extensive breakdown), secondly the introduced DNA must be replicated and the new copies must be distributed among the daughter cells at mitosis. Finally the introduced DNA must be expressed via transcription, transla