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Dissertation
Chiral recognition in the gas phase using femtosecond to nanosecond photoelectron circular dichroism
(2020-05)
Diese Arbeit konzentriert sich auf die chirale Erkennung in der Gasphase unter Verwendung der resonant verstärkten Multi-Photonen-Ionisation. Gasphasentechniken bieten die Möglichkeit, die Chiralität von Molekülen innerhalb einer nahezu interaktionsfreien Umgebung zu untersuchen. Photoionisation von chiralen Molekülen mit zirkular polarisiertem Licht führt zu einer Asymmetrie in der Photoelektronenemission bezüglich der Ausbreitungsrichtung des ionisierenden Lichts. Diese Asymmetrie ist bekannt als Photoelektronenz ...
Dissertation
Ferrocen-basierte N-heterocyclische Tetrylene
(2020)
Verbindungen des Typs R-E-R‘ (E = C, Si, Ge, Sn, Pb; R = Substituent) werden Tetrylene genannt. Da das jeweilige Tetrelatom E subvalent vorliegt, sind die meisten Vertreter dieser Substanzklasse hoch reaktiv und müssen unter Schutzgasatmosphäre gehandhabt werden. Die AG Siemeling beschäftigt sich bereits seit einigen Jahren vor allem mit Ferrocen-basierten N-heterocyclischen Vertretern der Tetrylene, wobei sich gerade die Synthese eines Silylens (E = Si) als besonders schwierig herausgestellt hat und zuvor nicht ...
Aufsatz
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Pyrolytic transformation of indigenous biomass wastes into biochar: an insight into char structure and physicochemical characteristics
(2022-08-20)
Biochar, the product obtained by the pyrolysis of organic materials with little or no available air, acts as a longterm recalcitrant source of organic carbon when applied to soil. In the present study an in-farm method has been standardized for the pyrolytic conversion of four indigenous biomass resources into biochar. The biomass feedstocks viz. bovine bone (BB), coconut shell (CS), rubberwood (RW) and water hyacinth (WH) were dried and subjected to proximate, ultimate, biochemical analysis and were subjected to ...
Aufsatz
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Rural farmers’ learning of weed management methods in Malaysia
(2022-08-31)
Malim Nawar in Kampar District, Malaysia, is a potential major production site for modern high-technology farms by 2030. To achieve this, a significant increase in intensive agricultural activities and weed management practices is required. To develop strategies and achieve the goals of sustainable agriculture, the present study used a semi-structured questionnaire survey to assess farmers’ perception of weeds, their sources of information, and their reasons for willingness or unwillingness to adopt non-chemical ...
Aufsatz
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Comparative study of white LED light and dark condition in domestic refrigerator on reducing postharvest strawberries waste
(2022-05-30)
Strawberry is one of the most consumed fruits in the world, and due to its perishability, there is a need for new conservation technologies capable of extending its shelf life. An alternative in preservation of short shelf life foods is refrigeration associated with LED lights. In this context, the present study evaluated the effect of white LED light in strawberry preservation at the postharvest condition. Strawberry samples were stored in a perforated package under refrigeration (5 °C), in the presence and the ...
Konferenzveröffentlichung
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Towards Empowering Educators to Create their own Smart Personal Assistants
(ScholarSpace, 2020)
Despite a growing body of research about the design and use of Smart Personal Assistants such as Amazon’s Alexa or Google’s Assistant, little is known about their ability to help educators offering individual support in large-scale learning environments. Smart Personal Assistant ecosystems empower educators to develop their own agents without deep technological knowledge. The objective of this paper is to design and validate a method that helps educators to create Smart Personal Assistants as learning tutors. Using ...
Aufsatz
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Protein and iron source snack bar made from Mlanding Tempeh – A fermented Lamtoro (Leucaena leucocephala)
(2022-08-31)
Mlanding tempeh is an Indonesian fermented food made from Lamtoro (Leucaena leucocephala), a tropical legume that contains complete nutrients and has high productivity and ability to adapt to dry climates. This traditional treatment seems improve its nutritional value, particularly the protein profile. However the short shelf life and low acceptance hinder this food to support community nutrition. This study introduced an effort to process this indigenous fermented legume into a snack bar which has better acceptance ...
Aufsatz
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Economics of food safety practices among cassava processors in northcentral Nigeria
(2022-08-31)
Food safety is a critical issue and a growing public health concern. Cassava being one of the staple foods widely consumed by the majority of households in Africa involves several processes. Assessment of the safety practices adopted by the processors is important to assist marketers and consumers towards the product to avoid food poisoning. Thus, this research assessed the economics of food safety practices adopted by cassava processors. Data collected from randomly selected 120 cassava processors were analysed using ...
Aufsatz
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Adoption and effectiveness of hermetic storage bags to reduce staple food postharvest loss for sustainability in the Ejura-Sekyedumase Municipality, Ghana
(2022-07-31)
Postharvest loss is a major problem facing agricultural households in the global south. It is in this context that the introduction of hermetic storage bags is viewed by many as a key solution to averting postharvest loss, especially for grains which are essential to food security. While there have been policy efforts to increase the availability of hermetic storage bags for farmers, little is known regarding the extent of its adoption and effectiveness in reducing grain loss. This study fills this empirical vacuum ...