975 resultados para 336.222
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Abschrift liegt vor
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u.a.: Klage über die Einsamkeit in der Provinz; Ferdinand Laban; Arthur Schopenhauer;
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Über seinen Garten
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Frankfurter Dialekttheater, Wilhelm Sauerwein: "Der Gräff, wie er leibt und lebt", "Gräff im Grünen", "Der Amerikaner", Carl Malß, Pfeifer: "Die Brunnenfahrt", Sauerwein: Briefe an Wilhelm Rieger (verloren), Collegzeitung, Geplante Sauerwein-Gesamtausgabe
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126 Briefe zwischen Max Horkheimer und Leo Löwenthal, Januar - August 1948; 1 Brief von Max Horkheimer an Herbert Marcuse, 1948; 2 Briefe zwischen Theodor W. Adorno und Leo Löwenthal, 1948; 1 Brief von Leo Löwenthal an Samuel H. Flowerman, 15.06.1948; 3 Briefe zwischen Erich Preiser und Leo Löwenthal, 1948; 1 Brief von Max Horkheimer an Howard Wilson, 28.08.1948; 1 Brief von Paul Lazarsfeld an Leo Löwenthal, 26.08.1948; 1 Brief von Käte Hirsch an Leo Löwenthal, [1948]; 1 Brief von Willy Haas an Max Horkheimer, 15.07.1948; 1 Brief von Max Horkheimer an Moses Finley, 16.08.1948; 1 Brief von Max Horkheimer an Robert J. Havighurst, [August 1948]; 1 Brief (Auszug) von Hans Mayer an Max Horkheimer, 23.03.1948; 1 Brief von Julius Schwietering an Max Horkheimer, 18.02.1948; 1 Brief von E. Stein an Max Horkheimer, 26.06.1948;
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Vorbesitzer: P. Henckel;
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Maternal ingestion of high concentrations of radon-222 (Rn-222) in drinking during pregnancy may pose a significant radiation hazard to the developing embryo. The effects of ionizing radiation to the embryo and fetus have been the subject of research, analyses, and the development of a number of radiation dosimetric models for a variety of radionuclides. Currently, essentially all of the biokinetic and dosimetric models that have been developed by national and international radiation protection agencies and organizations recommend calculating the dose to the mother's uterus as a surrogate for estimating the dose to the embryo. Heretofore, the traditional radiation dosimetry models have neither considered the embryo a distinct and rapidly developing entity, the fact that it is implanted in the endometrial layer of the uterus, nor the physiological interchanges that take place between maternal and embryonic cells following the implantation of the blastocyst in the endometrium. The purpose of this research was to propose a new approach and mathematical model for calculating the absorbed radiation dose to the embryo by utilizing a semiclassical treatment of alpha particle decay and subsequent scattering of energy deposition in uterine and embryonic tissue. The new approach and model were compared and contrasted with the currently recommended biokinetic and dosimetric models for estimating the radiation dose to the embryo. The results obtained in this research demonstrate that the estimated absorbed dose for an embryo implanted in the endometrial layer of the uterus during the fifth week of embryonic development is greater than the estimated absorbed dose for an embryo implanted in the uterine muscle on the last day of the eighth week of gestation. This research provides compelling evidence that the recommended methodologies and dosimetric models of the Nuclear Regulatory Commission and International Commission on Radiological Protection employed for calculating the radiation dose to the embryo from maternal intakes of radionuclides, including maternal ingestion of Rn-222 in drinking water would result in an underestimation of dose. ^
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Fil: Ocampo, Fernanda.
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Fil: Matuschka, Daniel von. Universidad Nacional de Cuyo. Facultad de Filosofía y Letras. Instituto de Filosofía Argentina y Americana
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This paper provides an overview of dust transport pathways and concentrations over the Arabian Sea during 1995. Results indicate that the transport and input of dust to the region is complex, being affected by both temporally and spatially important processes. Highest values of dust were found off the Omani coast and in the entrance to the Gulf of Oman. Dust levels were generally lower in summer than the other seasons, although still relatively high compared to other oceanic regions. The Findlater jet, rather than acting as a source of dust from Africa, appears to block the direct transport of dust to the open Arabian Sea from desert dust source regions in the Middle East and Iran/Pakistan. Dust transport aloft, above the jet, rather than at the surface, may be more important during summer. In an opposite pattern to dust, sea salt levels were exceedingly high during the summer monsoon, presumably due to the sustained strong surface winds. The high sea salt aerosols during the summer months may be impacting on the strong aerosol reflectance and absorbance signals over the Arabian Sea that are detected by satellite each year.