Sökning: "Natural regeneration"
Visar resultat 21 - 25 av 194 avhandlingar innehållade orden Natural regeneration.
21. A Class of Renewal Processes in Random Environments
Sammanfattning : This paper deals with a generalization of the class of renewal processes with absolutely continuous life length distribution, obtained by allowing a random environment to modulate the stochastic intensity of the renewal process. The random environment is a birth and death process with a finite state space. LÄS MER
22. Ecological rehabilitation of degraded hill slopes in southern Wello, Ethiopia
Sammanfattning : Clearing of vegetation has left large areas of southern Wello (Ethiopia) at a high risk ofland degradation. In this study, the causes, extent and consequences of land degradationproblems are reviewed. To see land cover changes, aerial photographs from 1958 and1986 were compared with the help of a GIS procedure. LÄS MER
23. Vascular Endothelial Growth Factor (VEGF) and Peripheral Nerve Regeneration
Sammanfattning : This thesis concerns vascular endothelial growth factor (VEGF) and its possible role as a neurotrophic factor. I have investigated the effect of VEGF on neurons in culture but also in vivo, following a crush lesion of the sciatic nerve, and following nerve repair. LÄS MER
24. Macrophages, Nitric oxide synthases and Heme oxygenases: possible roles during peripheral nerve regeneration
Sammanfattning : The purpose of this study was to investigate the suggestions that macrophages, and the systems generating nitric oxide (NO) and carbon monoxide (CO), i.e. nitric oxide synthases (NOS) and heme oxygenases (HO), could be important for peripheral nerve regeneration. LÄS MER
25. Regeneration measures in time and space : Site preparation, planting and digital tools
Sammanfattning : Regeneration success depends on decisions made based on factors on aregional, site, and microenvironmental level. Therefore, understanding andmapping of such factors between and within sites can guide decisions forbetter seedling establishment. LÄS MER