Сводный каталог книг

[Text] / E.A. Steinhaus. - Berkeley : University of California, 1960. - 327-333 p. - (Journal of Insect Pathology ; vol. 2, N 4). - eng. - Библиогр. в конце ст. - 0.02 р.

УДК

576.8

Аннотация: Miscellaneous observations on polyhedroses in several species of Lepidoptera are reported. The genera of Lepidoptera represented include Peridroma, Prodenia, Colias, and Heliothis. In the case of Peridroma, the data pertaining to a nuclear polyhedrosis were compared with those relating to a granulosis. Incubation periods, strain differences, cross infectivities, symptomatology, and the effects of certain stressors were determined or studied in individual instances. Also reported are new records of virus-diseased insects received as accessions for diagnosis

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[Text] / J.K. Wilson , T.L. Lyon. - New York : Cornell University, 1926. - 25 p. : табл. - (Cornell University Agricultural Experiment Station ; memoir 103). - eng. - Библиогр. в конце ст. - бесплатно

УДК

576.8

Аннотация: Soil was placed in large tubes, and after these had been heated in an autoclave and inoculated with pure cultures of selected organisms, sterilized seeds of maize or timothy in some of the tubes while others remained unplanted. After the plants had grown for periods varying from several days to a few months, the soil was removed from both the planted and the unplanted tubes, dilute infusions were plated, and colonies were counted after incubation. With few exceptions the soil in which plants growing contained a larger number of organisms than did the unplanted soil. The organisms used were in every case those known to be active in changing nitrogen from one form to another. The conclusion is drawn that at least some crop plants produce a condition in the soil surrounding their roots which favors the growth of certain microorganisms that consume nitrate nitrogen, thus accounting for the disappearance of nitrate nitrogen not absorbed by the plants


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Lyon, T.L.
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[Текст] / E. Ambellan, V.P. Hollander. - New York : [б. и.], 1966. - 474-484 с. : рис. - (Analytical Chemistry ; vol. 17). - eng. - Библиогр. в конце ст. - 0.66 р.

УДК

577

Аннотация: A method is described for the precipitation of unhydrolyzed RNA after RNase digestion that avoids the use of strong acids and is extremely sensitive for enzyme assay. The dilution step usually required for spectrophotometric measurements of supernatant fractions after separation from unhydrolyzed RNA is eliminated. The precipitating reagent is buffered lanthanum-magnesium-ethanol added in 10-fold volume to enzyme incubation mixtures. In the macroassay, an increase in absorbancy of 0.41 is obtained with 1 m g bovine pancreatic RNase after 15 min incubation at 37 C. For micromethods, the ethanol can be replaced by Cellosolve (2-ethoxyethanol) and sensitivity increased 5- to 10-fold


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Hollander, V.P.
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[Text] = Studier over kvavemobiliseringen i skogsjord : научное издание / C.O. Tamm, A. Pettersson. - Stockholm : Skogshogskolan, 1969. - 39 p. : рис., табл. - (Studia Forestalia Suecica, ISSN 0039-3150 ; № 75). - eng. - Библиогр.: с. 25-26. - 0.50 р.

УДК

06

Аннотация: Incubation experiments were perfomed on samples from horizons of middle Swedish podzol profiles, stored under aerobic conditions at room temperature for up to two and a half years. More than one-third of the organic matter in the mor sample from a good site disapeared during two years' incubation at room temperture. Twenty-four to twenty-six per cent of its nitrogen content was simultaneously mineralised, the largest part as ammonia. The loss of organic matter was somewhat lower in samples from three poor sites (between 20 and 30 per cent) and the release of nitrogen was also lower (12 to 17 per cent). Both the breakdown and the release of nitrogen were generally decreased nitrogen lelease in mor samples (often to nil) but increased release in B horizon samples. Liming also increased nitrate formation


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Pettersson, A.
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[Текст] : научное издание / A. Pehap. - Stockholm : Skogshogskolan, 1972. - 19 с. : рис., табл. - (Studia Forestalia Suecica, ISSN 0039-3150 ; № 101). - eng. - Библиогр.: с. 19-20. - ISBN 91-38-01464-5 : 0.40 р.

УДК

06

Аннотация: Aged seeds of Scots pine left different eluate spots on the blotter in a germinator after about 24 hours' incubation. Fresh seeds do not give off such eluates. Among the leached substances were found proteins, nucleic acids, amino acids, fats, sugars, etc. The eluate spot are visible on the blotter only after development by simple biochemical methods used in paper chromatography. Possibility of using this eluate-development method as a seed viability test, and other practical aspects, are described.

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