Now showing items 1-10 of 1662
Coinage Metal Complexes of the Carbenic Tautomer of a Conjugated Mesomeric Betaine Akin to Nitron
This study was motivated by our recent observation that the analytical reagent Nitron (2) is an “instant carbene”, whose reaction with coinage metal salts MX afforded complexes of its carbenic tautomer 1,4-diphenyl-3-phenylamino-1,2,4-triazol-5-ylidene (2′). Our aim was to establish an alkyl homologue of 2 in order to achieve a carbenic tautomer of higher donicity. For this purpose 1-tert-butyl-4-methyl-1,2,4-triazol-4-ium-3-tert-butylaminide (6) was synthesized. Its reactions with MX afforded complexes of the carbenic ...
Adoption of Organic Farming as an Opportunity for Syrian Farmers of Fresh Fruit and Vegetables: An Application of the Theory of Planned Behaviour and Structural Equation Modelling
Exporting organic fresh fruit and vegetables (FFV) to the European Union could represent a great opportunity for Syrian farmers and exporters. Yet, the organic sector in Syria is comparatively young and only a very small area of FFV is organically managed. To date, little is known about Syrian farmers’ attitudes towards organic FFV production. Therefore, the aim of this study was to explore the intentions and attitudes of Syrian farmers of FFV towards organic farming and how likely they are to convert their farms to ...
Lower-extremity resistance training on unstable surfaces improves proxies of muscle strength, power and balance in healthy older adults: a randomised control trial
Background: It is well documented that both balance and resistance training have the potential to mitigate intrinsic fall risk factors in older adults. However, knowledge about the effects of simultaneously executed balance and resistance training (i.e., resistance training conducted on unstable surfaces [URT]) on lower-extremity muscle strength, power and balance in older adults is insufficient. The objective of the present study was to compare the effects of machine-based stable resistance training (M-SRT) and ...
Zur Geschichte kulturhistorischer Dauerausstellungen im 19. und frühen 20. Jahrhundert
Das kulturhistorische Museum des 19. Jahrhunderts war wohl die erfolgreichste Neuerfindung des „bürgerlichen Zeitalters“ im Museumswesen. Während die wesentlich früher etablierten Institutionen des Kunstmuseums und des Naturkundemuseums auf eine lange Vorgeschichte nicht oder nur teilweise öffentlich zugänglicher Sammlungen zurückblicken konnten und ihre moderne Ausprägung sich bereits im Laufe des 18. Jahrhunderts abzeichnete, entstand das kulturhistorische Museum erst aus der Reaktion auf die politischen Umwälzungen ...
Phenotypic diversity, major genes and production potential of local chickens and guinea fowl in Tamale, northern Ghana
Objective: Our study provides information on phenotypes of local chickens and guinea fowl and their body measures as well as on major genes in local chickens in northern Ghana. Methods: Qualitative and morphometric traits were recorded on 788 local chickens and 394 guinea fowl in urban households in Tamale, Ghana. Results: The results showed considerable variation of color traits and numerous major genes in local chickens, while color variations and related genotypes in guinea fowl were limited. In local chickens, ...
In the search for low-cost year-round feeds: Pen-level growth performance of local and crossbred Ugandan pigs fed forage- or silage-based diets versus commercial diet
(Kassel University Press, 2018-12-04)
Smallholder pig farmers in East Africa report that lack of feed, seasonal feed shortages, quality and cost are key constraints to pig rearing. Commercially prepared pig diets are too expensive and people and pigs compete for food. Smallholder farmers typically feed nutritionally unbalanced diets, resulting in low average daily gain (ADG) and poor farmer profits. Our objective was to compare the ADG of Ugandan pigs fed forage- or silage-based or commercial diets. Ugandan weaner-grower pigs were randomly assigned to ...
Development of organic products in Kyrgyzstan
(Section Specialized Partnerships in Sustainable Food Systems and Food Sovereignty at the University of Kassel, Germany and Federation of German Scientists (VDW), 2019-06-05)
Kyrgyzstan is a mountainous and landlocked Central Asian country, one of five former Soviet Republics in the region. Agriculture is the main economic sector employing around 20% of population and contributing roughly 20% to the country’s GDP. Due to its climatic conditions, the Central Asian region was considered as a space for growing cotton, wheat, fruits and vegetables and tobacco and other cultures during Soviet times. Owing to its nomadic culture, Kyrgyzstan has been active predominantly in the animal husbandry sector.
Towards Effective Natural Language Application Development
There is a current trend that more and more computer programs analyze written or spoken natural language. For example, DVAs, IE systems, machine translation systems, and many other types of programs process natural language in order to solve specific use cases when interacting with humans via natural language. Amazon, Google, and Mycroft AI are just some of the companies that have produced DVAs capable of interacting with humans via voice. Such NLP applications use techniques from computer science and artificial ...
BamB facilitates folding of outer membrane protein A (OmpA) via interactions of its β-propeller with the membrane surface and via a conformation change induced by phosphatidylglycerol
A sufficient folding and insertion of OMPs into the OM of Gram-negative bacteria requires the conserved β-barrel assembly machinery (BAM) complex. The present thesis concerns the structural properties and folding behavior of the lipoprotein BamB and describes its relevance in the synchronized mechanism of membrane insertion and folding of the β-barrel protein OmpA. Furthermore, specific binding sites in BamB involved in the interaction to the lipid membrane or the periplasmic domain of BamA (PD-BamA) were identified ...
Leading and Following Day by Day
This dissertation deals with daily leader-follower interactions, alignment of words and actions, well-being and effectiveness. The first part of the dissertation shows the impact of leader behavior on follower well-being in the context of transformational leadership. The second part goes beyond single leader behaviors and investigates the value-based alignment of two behaviors, namely vision communication and goal setting, and their effects on trust and leaders‘ effectiveness. Turning the lens, the final part sheds ...