Naturwissenschaft, Mathematik, Informatik

Die dielektrische Erwärmung von Samen kann z. B. für die thermische Vorbehandlung vor der Verarbeitung angewendet werden. Dabei kommt es zu einer schnellen Temperaturerhöhung in dem zu trocknenden Gut, was zu mikrostrukturellen Veränderungen in den Samen und zur Inaktivierung lipidspaltender Enzyme führen kann. Die vorliegende Studie wurde durchgeführt, um den Einfluss der dielektrischen Erwärmung mittels Mikrowellen und Hochfrequenzwellen in Abhängigkeit von Dauer und Temperatur auf qualitative Merkmale von Rapssamen und zwei Sorten von Sonnenblumenkernen mit unterschiedlicher Fettsäurezusammensetzung zu untersuchen. Die...

History has witnessed forests shaping human civilization from the ancient times to the industrial ages and after. In recent years, the world's forests have staged more prominent roles in our society. That the year 2011 has been declared as the International Year of Forests by the United Nations reveals a bold statement on such importance. The forests of Indonesia are in particular; stakes placed upon are diverse and often conflicting, not only from local or national levels but also from...

Three local carrot cultivars from Myanmar and two hybrid cultivars from Germany were investigated for their yield and nutritional quality supplied by mineral or organic fertilizers. Root yield and nutritional qualities were affected by cultivar difference and fertilizer types. Details Titel: Agronomic characteristics and nutritional quality of carrot (Daucus carota L.) cultivars from Myanmar and Germany as affected by mineral and organic fertilizers Autorin: Dr. Le Le Win Auflage: 1. Auflage Hochschule: Georg-August Universität Göttingen Erschienen: 1. Aufl. 20.09.2010 Fachbereich:...

Twenty eight genotypes of tomato were organically cultivated in two locations (Schönhagen and Ellingerode, Germany) in different two years. Plant infection by Phytophthora infestans was evaluated as well as the fruit nutritional and quality parameters (content of lycopene, phenolic compounds, ascorbic acid antioxidant capacity, mineral nutrients and organic compounds). It was also of interest to find a connection between infection and fruit quality. Details Titel: Organically-grown tomato (Lycopersicon esculentum Mill.) Untertitel: Plant infection by Phytophthora infestans and fruit quality Autor:...

Ackee is an underutilized species native to West Africa important for the livelihoods of rural population and candidate species for domestication. However, because the species was neglected for so long, key knowledge essential to elaborate a clear domestication strategy is very sketchy in the region. This book provide data from Benin on farmer's indigenous knowledge and perception of variation taking into account the difference among ethnic groups and gender, the morphological variability in tree and fruit traits in relation to...

Ectomycorrhiza Paxillus involutus (two strains: Maj and Nau) were used to synthesize mycorrhiza with Populus canescens in an axenic culture. Next fungal strain Maj and the systemic fungicide Previcur® N were used on 5 clones of Populus nigra cuttings in an open condition. Biometric parameters, microsatellite, photosynthesis rate, ecto- and arbuscular mycorrhization, endophytic fungal colonisation, ITS-sequencing, biochemical analysis, insect feeding test and emission of volatile compounds were studied. Details Titel: Influence of ectomycorrhiza Paxillus involutus (Batsch. Ex. Fr.) inoculation and fungicide treatment on Populus sp. Autor:...

The monotypic tropical tree species Hagenia abyssinica (Rosaceae) is an anemogamous and anemochorous broad-leaved dioecious tree species native to Africa. Fossil pollen evidences suggest that it immigrated into Ethiopia from the south during the late Pleistocene. The chloroplast haplotypes identified in Hagenia are grouped into two lineages and demonstrated a strong pattern of congruence between their geographical distribution and genealogical relationships. Restricted gene flow through seeds, contiguous range expansion, mutation and rare long-distance dispersal shaped the genetic structure in the...

Cedrus brevifolia (Cyprus cedar) is a narrow endemic species of the Cyprus flora. The range of the species has nowadays been limited to only one population, which is non-uniform and has been restricted to five neighbouring stands (patches) in the region of the Pafos forest. Although C. brevifolia is an endemic species with a narrow distributional range, it exhibits high genetic diversity. Based on this result, the species does not appear to be characterised by founder effect. The high genetic...

Tropical rainforests are hostspots of biodiversity. Therefore, their species' richness and sustainability are of central importance. However, during the last decades, the destruction of tropical forest, mainly by illegal logging, has severely degraded the tropical rainforests. In terms of forest certification, timber identification of tree species and their origin are recently being applied for monitoring and control of illegal activities and thereby aiming at the conservation of tropical forests. The development of molecular methods (e.g. genetic fingerprints) as tools for...

Phyto-hormones play critical roles in the coordination of plant growth and development. Generally, plant hormones promote, inhibit, or qualitatively modify plant growth and development. This complex process requires signal transduction, specific information pathways, translating intra- or extra-cellular signals into specific cellular responses within a cell. Auxins represent an important class of plant hormones. Plant growth is regulated by auxin via the regulation of various genes responsible for different metabolic processes in the plant. The impact of toxic heavy metals like...