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651.
The majority of the objects found in the textiles collection at the German Historical Museum in Berlin have been treated with different biocides at various points in the past. Prior to this study, the presence of organochlorinated pesticides in rooms and storage cabinets had already been proven in an analysis of air samples that employed gas chromatography and mass spectroscopy. To estimate the risks these toxins pose to both collections and museum staff, we conducted a field study with the help of a portable X-ray fluorescence spectrometer. In this study, we present an attempt at a reliable quantitative analysis. In addition to chlorine, other potentially hazardous elements such as lead, arsenic, and mercury were found in the majority of the objects. In some cases, however, it has to be taken into account that the detected elements might have originated from manufacturing processes rather than biocide treatments. Such knowledge is a crucial prerequisite to proper risk prediction. 相似文献
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Dr. Jochen Kramer Dr. Ingo Zettler Dr. Felix Thoemmes Prof. Dr. Gabriel Nagy Prof. Dr. Ulrich Trautwein Prof. Dr. Oliver Lüdtke 《Zeitschrift für Erziehungswissenschaft》2012,15(4):847-874
The German higher education system has three different types of universities. This study aims to investigate the effect of choosing one particular university type on central personality traits (vocational interests, vocational motives and the Big Five). Existing results clearly show that the individual types of universities recruit students with different backgrounds. Whether differential development during and after studies is determined by university type (i.e. socialization effects in a broader sense) or whether it denotes a consequence of pre-existing differences among students of the university types will, for the first time, be examined using propensity-score matching. To do this, data of a large longitudinal study in Baden-Wuerttemberg were used in order to compare 1568 students at traditional universities (Universit?ten), universities of applied sciences (Fachhochschulen), and universities of cooperative education (Berufsakademien) in their second, fourth and sixth year after university entrance examination. Socialisation effects were tested in propensity-score based parallelised sub-samples (N?=?622). Results show that differences between university types can mainly be explained with selection effects and that the effects of attendance at the university types itself were hardly differential. 相似文献
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Carol Vincent Caroline Oliver Georgia Pavlopoulou 《British Educational Research Journal》2023,49(3):522-537
This paper reports on the findings of a BERA-funded small-scale project that explores the impacts of COVID-19 lockdowns on the educational experiences of autistic children and young people who attend mainstream schools and their parents/carers in England. We observe that, unsurprisingly, lockdown resulted in associated stresses for families. However, our main argument is that for the participants, the pandemic has not been experienced to the same extent as is popularly understood; that is, causing major disruption to children's schooling experiences and/or unusual levels of social isolation. Using the concept of stigma as a theoretical resource, we argue that this is because the families with whom we spoke were already experiencing, pre-COVID-19, disrupted schooling and degrees of social isolation. Indeed, for many of the young people, the break from school occasioned by lockdown allowed them a release from the more negative and stigmatising aspects of their routine experiences within school. We therefore argue that the disruption of the pandemic sheds light on how stigma shapes students' daily school experiences. 相似文献