Download Advances in Agronomy, Vol. 27 by N.C. Brady (Ed.) PDF

By N.C. Brady (Ed.)

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1965). Levan synthesis is more intense in the absence than in the presence of toluene (Fig. 2). , 1962a, 1972). Similarly, levanolysis in soils not treated with toluene is due primarily to the levanase of proliferating microorganisms rather than to the accumulated 34 s. KISS, M. DRAGAN-BULARDA, AND D. , 1965; Drigan-Bularda and Kiss, 1972b). In both the presence and the absence of toluene, levan synthesis predominates over levanolysis (Kiss and Dragan-Bularda, 1968a, 1970a). Levansucrase and levanase activities in soil samples 7-irradiated at minimum sterilizing dosage did not suffer any changes in comparison with the activities of nonirradiated but toluene-treated samples.

And Higgs, K. H. 1. Hort. Sci. 48, 203-215. Greacen, E. , and Oh, J. S . 1972. Nature (London), N e w Biol. 235, 24-25. Hsiao, T. C. 1973. Annu. Rev. Plant Physiol. 24, 519-570. , and Aspinall, D. 1970. Ann. Bot. ]34, 393-408. Jordan, W. , and Ritchie, J. T. 1971. Plant Physiol. 48, 783-788.. Keck, R. , and Boyer, J. S. 1974. Plant Physiol. 53, 474479. Kerr, J. , McPherson, H. , and Talbot, J. S . 1973. Proc. Aust. C o n f . Heat Mass Transfer, Ist, 1973 Sect. 3, pp. 1-8. Kirkham, M. , Gardner, W.

Levansucrase and levanase activities in soil samples 7-irradiated at minimum sterilizing dosage did not suffer any changes in comparison with the activities of nonirradiated but toluene-treated samples. At heavier dosages of 7-rays some reductions occurred in both enzyme activities (M. DrBgan-Bularda and S. Kiss, unpublished data). 14. Synthesis and Hydrolysis of Dextran Besides levan, dextran is also synthesized in reaction mixtures consisting of soil, toluene, and sucrose solution and incubated for several days.

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