Helmut Stärker und der OVE-verlässlicher Partner im Netzwerk der Branche

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Helmut St?rker und der OVE-verl?sslicher Partner im Netzwerk der Branche     

Cognitive bias modification: Induced interpretive biases affect memory.

Previous research has shown that it is possible to experimentally induce interpretive biases using ambiguous scenarios. This study extends past findings by examining the effects of cognitive bias modification for interpretation on subsequent scenario recall. Participants were trained to interpret emotionally ambiguous passages in either a positive or negative direction. Transfer of the training to novel scenarios was tested. After training, participants were also asked to recall details from these novel scenarios. The results indicate that the training was effective in inducing the intended group differences in interpretive bias. Importantly, participants exhibited memory biases that corresponded to their training condition. These results suggest that manipulating interpretive biases can result in corresponding changes in memory. Findings from this study highlight the importance of future research on the relation among cognitive biases and on the possibility of modifying cognitive biases in emotional disorders. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Ganzheitliche Betrachtung bei Analyse,Planung und Ausführung von Sanierungen - Risikomanagement im Altbergbau

Examination and rehabilitation of mining legacies often result initially in separate risk management systems for surface openings and near-surface mining activities. On the one hand this can be explained by more or less spectacular past loss events around abandoned surface openings and on the other hand by the gradual change of approach to and perception of the issue of abandoned near-surface mines in the last centuries respectively, that has taken place lately. Initially, the focus used to rest on the entrances as they present a high but spatially limited risk potential and, being technical underground structures that break through the surface, they are also easier to detect and prioritise than near-surface mining or other mine workings. Against this background, this risk assessment, prioritisation and rehabilitation limited purely to the surface openings does make sense for large deep mining shafts. For smaller surface openings like, for example sloping shafts which were mostly driven in the seam, however, it is imperative to evaluate the risk in dependence on the associated seam as well as the near-surface mining operations which took place therein. For this reason, with respect to the risk management of abandoned near-surface mines, it is essential to take a holistic approach to analysis and evaluation but above all concerning implementation planning and rehabilitation of mine workings and affected areas respectively. On the one hand it comprises all facts to be collected beforehand and the possibly resulting reciprocal effects, however, on the other hand, influences resulting from exploratory or rehabilitation measures themselves are also of importance. Any intervention in the underground has the potential to at least upset the temporary balance and can for this reason actively change the risk potential.     

Regiocomplementary O‐Methylation of Catechols by Using Three‐Enzyme Cascades

S‐Adenosylmethionine (SAM)‐dependent enzymes have great potential for selective alkylation processes. In this study we investigated the regiocomplementary O‐methylation of catechols. Enzymatic methylation is often hampered by the need for a stoichiometric supply of SAM and the inhibitory effect of the SAM‐derived byproduct on most methyltransferases. To counteract these issues we set up an enzyme cascade. Firstly, SAM was generated from l ‐methionine and ATP by use of an archaeal methionine adenosyltransferase. Secondly, 4‐O‐methylation of the substrates dopamine and dihydrocaffeic acid was achieved by use of SafC from the saframycin biosynthesis pathway in 40–70 % yield and high selectivity. The regiocomplementary 3‐O‐methylation was catalysed by catechol O‐methyltransferase from rat. Thirdly, the beneficial influence of a nucleosidase on the overall conversion was demonstrated. The results of this study are important milestones on the pathway to catalytic SAM‐dependent alkylation processes.     

Extraktionsverfahren zur simultanen Bestimmung von Natrium, Kalium, Calcium, Magnesium, Eisen, Kupfer, Zink und Mangan in organischem Material mit Hilfe der Atomabsorptionsspektrophotometrie

Zusammenfassung Das beschriebene Extraktionsverfahren ermöglicht die Bestimmung von Natrium, Kalium, Calcium, Magnesium, Eisen, Kupfer, Zink und Mangan in organischem Material aus einem Aufschluß. Das Extraktionsverfahren liefert im Vergleichmit konventionellen Methoden [1, 2, 4] übereinstimmende Werte für die Elemente Natrium, Kalium, Calcium, Magnesium, Eisen und Mangan. Für die quantitative Bestimmung von Kupfer und Zink ist die Extraktionsmethode der trockenen Veraschung bei 450° C [1, 4] überlegen. Daruber hinaus ist die Extraktionsmethode der trockenen Veraschung vorzuziehen, da Probenmenge, Zeitbedarf und Kosten bei der Verwendung der beschriebenen Methode wesentlich gesenkt werden können.

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Extraction method for the simultaneous determination of sodium, potassium, calcium, magnesium, iron, copper, zinc and manganese in organic material using atomic absorption spectrophotometry

Summary Determination of sodium, potassium, calcium, magnesium, iron, copper, zinc, and manganese in organic material is possible with one digestion using the described extraction method. Data for sodium. potassium, calcium, magnesium, iron, and manganese agree well with those obtained by conventional methods [1, 2, 4]. For quantitative determination of copper and zink the extraction method is superior to dry ashing at 450° C [1, 4]. In general the extraction method ist preferable to dry assing, because the amount of sample, time and costs can be reduced essentially using the described method.

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Die Untersuchungen wurden mit Mitteln des Ministeriums für Wissenschaft und Forschung des Landes Nordrhein-Westfalen durchgefuhrt