974 resultados para ENDO-1,4-XYLANASE II
Resumo:
"The Collapse of German Democracy and the Expansion of National Socialism" (1940):; 1. Darstellung des Forschungsprojekts (15.9.1940), b. Typoskript mit handschriftlichen Korrekturen, 78 Blatt; 2. "Research work on recent trends in the history of ideas (parts of the Research project on the Collapse of German Democracy would be included)". Als Memorandum zur Eröffnung zur Eröffnung einer Zweigstelle des Instituts in Los Angeles (12.12.1940): a) Typoskript, 2 Blatt, b) Teilstück, Typoskript mit handschriftlichen Korrekturen, 1 Blatt, c) Teilstück, Typoskript mit handschriftlichen Korrekturen, 1 Blatt, d) Teilstück, Typoskript, 1 Blatt, e) Teilstück, Typoskript, 1 Blatt, f) Entwurf, Typoskript mit handschriftlichen Korrekturen und Manuskript, 3 Blatt; 3. University of California, Los Angeles: 2 Briefe (Abschrift) von Max Horkheimer, o.O., 1940, 2 Briefe (Abschrift) an Max Horkheimer, 1940, 2 Blatt; A.R.L. Gurland: "Survey of Structural Changes in the German Economy, 1933 to 1939. Technological Bases and Organizational Forms of the National Socialist Economic System". Typoskript mit handschriftlichen Korrekturen unter anderem von Theodor W. Adorno, 48 Blatt (formal nicht identisch mit "Technological Trends and Economic Structure under National Socialism", Studies in Philosophy and Social Science, Bd. IX, 1941, S. 226ff.); "Cultural Aspects of National Socialism. A Research Project" (1941):; 1. Institute of Social Research: Mitteilung über das Forschungsprojekt und das 'Supplementary Statement', Typoskript, englisch, 4 Blatt; 2. Supplementary Statement to the Research Project, a) Typoskript, 14.4.1941, 63 Blatt, b) Typoskript, 12.4.1941, mit handschriftlichen Korrekturen, 35 Blatt; 3. "Cultural Aspects of National Socialism. A Research Project" (24.2.1941), a) als Typoskript vervielfältigt, 54 Blatt, b) Typoskript mit handschriftlichen Korrekturen, 34 Blatt, c) Fassung Januar 1941, Typoskript mit handschriftlichen Korrekturen, 40 Blatt; 4. Inhaltsverzeichnisse, mit handschriftlichen Korrekturen, 3 Blatt;
Resumo:
In the mouse, gamete recognition is mediated in part by the binding of sperm surface $\beta$1,4 galactosyltransferase (GalTase) to specific oligosaccharide residues on the zona pellucida ZP3. The expression of GalTase on the sperm surface is regulated by alleles within the distal segment of the T/t complex and results in a haploid-specific increase in GalTase expression on spermatids and sperm from t-bearing males, suggesting that differences in sperm GalTase activity may contribute to t-sperm transmission ratio distortion. In this study, the expression of GalTase RNA during wild-type and T/t-mutant spermatogenesis was characterized and the role of GalTase was analyzed in transmission ratio distortion. It was found that spermatogenic cells predominantly express the long form of the GalTase RNA, which encodes the GalTase protein that is preferentially targeted to the cell surface in somatic cells. In wild-type testes, GalTase RNA accumulates during the maturation of primary spermatocytes, reaches peak levels prior to meiosis, and decreases and meiosis. GalTase RNA accumulates to similar levels during the maturation of +/t and t/t primary spermatocytes, but unlike wild-type, the level of GalTase RNA in t-spermatocytes remains elevated during meiotic division. Consequently, spermatids in t-mutant testes inherit higher levels of GalTase RNA than do wild-type spermatids, which likely accounts for the haploid-specific increase in surface GalTase activity characteristic of spermatids from t-bearing mice.^ The functional significance of the increased GalTase activity during t-sperm transmission ratio distortion was determined by examining the distribution of GalTase RNA and surface GalTase protein in haploid spermatids from +/t males. Results show that +- and t-spermatids have similar levels of both GalTase RNA and protein, indicating that transmission ratio distortion in +/t mice is not likely due to haploid-specific differences in sperm surface GalTase activity.^ The presence of GalTase on the surface of an early spermatogenic cells before it is required on the mature sperm to perform its function during gamete binding suggests a separate function for GalTase in Sertoli-germ cell adhesion. Studies indicate that cell surface GalTase partly mediates the initial adhesion of pachytene spermatocytes, but not haploid spermatids, to Sertoli cells. ^
Resumo:
Fil: Peretó Rivas, Rubén.
Resumo:
Structure and composition of sub-surface bottom sediments from the southwest Barents Sea have been under study. The study has revealed heterogeneity of sediment structure resulted from temporal irregularity and variability of sedimentation processes. The study of the heavy minerals from 0.1-0.01 mm grain size fraction has shown prevalence of green hornblende, epidote, garnet, and ilmenite in all types of sediments; these minerals are the basis of terrigenous-mineralogical province. At the same time in different areas local terrigenous-mineralogical associations have been identified. Clay mineral composition of in the sediments was quite uniform: biotite, chlorite, hydromica, smectite. Despite this, a number of features indicating initial stages of clay mineral transformation has been identified. Differences in material composition and structure of the studied sediments are associated with rapid change in paleogeographic situation on the land - ice cover melting on the Kola Peninsula and subsequent Holocene climatic situation.
Resumo:
Antarctic land surfaces in South Victoria Land, all without a covering of vegetation, are actively formed by winds which often reach velocities of more than 100 km/h. Consequently, deflation and abrasion are essential factors in the process of slope formation. Water erosion, active only during the very short summer period, is limited to a few localities in South Victoria Land. Experiments in a wind tunnel proved that ventifacts in the Dry Valleys can be formed within a few decades or at the most, a few centuries. Yearly corrasion rates average around a maximum of a few millimeters. Considerable variability is caused by the different exposures of ventifacts within the micro relief end the varying resistance of the rocks. The importance of ice crystals (snow) for abrasion processes should not be overestimated.