Naturwissenschaft, Mathematik, Informatik

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 reconstruction of 3D scene models from arbitrary video sequences is a central task of computer vision. Applications range from the autonomous navigation of robots to the acquisition of 3D models for the entertainment industry. Typical approaches identify and track landmarks in the images as a first step and then recover the geometry in a separate, second step. This book instead focuses on a combination of the two steps. By embedding the novel, combined method in a model-based mathematical framework,...

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...

The drill (Mandrillus leucophaeus) is an endangered, terrestrial primate endemic to the Lower Guinean rainforests between the Cross and Sanaga Rivers and on the island of Bioko in Central Africa. Rarely studied in the wild, the current status and ecological needs of the species are poorly understood. The book presents data on drill diet, seed handling, group size and structure, and conservation status from a study in the Korup National Park, Cameroon. Ecological findings are compared to reports from the...

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...

Infestation with the insect pest is a major problem associate with producing, storing and marketing of grains. Microwave and radio frequency are emerging as safe alternatives to chemical methods, eliminating chemical residue and minimize the grain damage. The present study was performed to investigate the efficiency of microwave and radio frequency in controlling life stages of Sitophilus zeamais in maize grains with different initial moisture contents at various temperatures and holding times. The results indicated that there is a possibility...

Fabrication of ZnO QD’s for visible light emission applications, surface modulation for stability in dispersions and defect control at the surface is vitally important. Therefore long alkyl chain group (e.g. oleate) and biological molecule cysteine were used together with sol-gel chemistry as vectors to regulate reactivity of the ZnO QD’s and their visible light emission. Additionally, using different ligand concentrations and reaction conditions, semiconductor nanostructures of unusual geometrical shapes were synthesized and characterized. Hexagonal crystal growing habit of ZnO provided...