无法取消
发表于 2025-4-1 03:15:36
,Die Aufgabe und ihre Durchführung,s 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
多样
发表于 2025-4-1 09:16:24
https://doi.org/10.1007/978-3-658-00232-9ogenic 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
Ophthalmoscope
发表于 2025-4-1 10:36:45
Erratum to: Die Untersuchung des Glyzerins,olecular genetics. The genes for nitrogen fixation (. genes) were first shown to be located near the operon for histidine biosynthesis in .. . by cotransduction of . and . using the generalized transducing bacteriophage P1 (Streicher, Gurney and Valentine, 1971). At the same time, Dixon and Postgate
Carcinogenesis
发表于 2025-4-1 16:56:31
,Das Glück des Traurigseins: Melancholie,. In . the broad outline of organization and control of genes concerned with nitrogen fixation and assimilation of ammonium has been worked out (Streicher and Valentine, 1973; Brill, 1975). In this case the problems are more amenable to genetical and biochemical analysis since the organism expresses