956 resultados para SI-NANOCRYSTALS


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Capita Ad Dispvtandvm Proposita A Bernardo Ziglero. ... Ad diem Iunij sextum.

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... W. von Rothschild (Französ. Text, Des-dur)

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Baronin W. von Rothschild [= Mathilde von Rothschild]

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Im Beitrag geht es um eine kritische Würdigung der ersten Sozialenzyklika Papst Franziskus' aus evangelischer Sicht. Betont werden die Parallelen zwischen Laudato Si' und der protestantischen Tradition des Nachhaltigkeitsdenkens seit den siebziger Jahren des 20. Jahrhunderts. Wichtige Parallelen liegen in der Verbindung von Ökologie und sozialer Gerechtigkeit, im Hinweis auf die Ungleichverteilung der Macht und die Notwendigkeit entsprechender Reformen, in der genauen Krisenwahrnehmung und der Aufmerksamkeit für eine Nachhaltigkeitskultur, im Selbstverständnis der Enzyklika als Diskursangebot eher denn als Lehrschreiben. Zudem formuliert der Autor aus protestantischer Perspektive kritische Anfragen an das Moderne- und Naturverständnis der Enzyklika.

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Aims. The main goal of this work is to study element ratios that are important for the formation of planets of different masses. Methods. We study potential correlations between the existence of planetary companions and the relative elemental abundances of their host stars. We use a large sample of FGK-type dwarf stars for which precise Mg, Si, and Fe abundances have been derived using HARPS high-resolution and high-quality data. Results. A first analysis of the data suggests that low-mass planet host stars show higher [Mg/Si] ratios, while giant planet hosts present [Mg/Si] that is lower than field stars. However, we found that the [Mg/Si] ratio significantly depends on metallicity through Galactic chemical evolution. After removing the Galactic evolution trend only the difference in the [Mg/Si] elemental ratio between low-mass planet hosts and non-hosts was present in a significant way. These results suggest that low-mass planets are more prevalent around stars with high [Mg/Si]. Conclusions. Our results demonstrate the importance of Galactic chemical evolution and indicate that it may play an important role in the planetary internal structure and composition. The results also show that abundance ratios may be a very relevant issue for our understanding of planet formation and evolution.

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-l.

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Zalmen Reyzen

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7 Stb.: Canto, Alto, Tenore, Basso, Quinto, Sesta parte, Organo

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Signatur des Originals: S 36/G10567

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Signatur des Originals: S 36/G01261

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Background. Poor nutrition is an important factor in the onset of obesity which is a growing problem in the United States that disproportionately affects Mexican-Americans. In order to form recommendations and effectively target nutrition in interventions it is necessary to have valid epidemiological tools to better understand dietary trends. Purpose. The purpose of this study is to evaluate the validity of the nutritional intake questions from the Tu Salud, ¡Sí Cuenta! Questionnaire in an adult Mexican-American population. Methods. Fifty participants in the Cameron County Hispanic Cohort were recruited into the validity study, which consisted of completing the Tu Salud, ¡Sí Cuenta! questionnaire and the 24-hour recall with a 2 hour time period between administrations. Responses were analyzed to determine the percent agreement, kappa statistic and Spearman rank order correlation. Results: Five items had good validity (>0.6), three items had fair validity (>0.4), and three items had poor validity (<0.4). In general, items that had low validity were those that were reported in low frequencies by study subjects. Overall, the Tu Salud, ¡Sí Cuenta! questionnaire showed good validity, making this questionnaire a valuable tool to assess the dietary intake patterns of this Mexican-American adult population. ^