Sökning: "leaf"
Visar resultat 1 - 5 av 264 avhandlingar innehållade ordet leaf.
1. To “leaf” or not to “leaf” : Understanding the metabolic adjustments associated with leaf senescence
Sammanfattning : The adequate execution of the final developmental stage of a leaf, leaf senescence, is crucial to the long-term survival of the plant. During senescence cellular structures like membranes, proteins, lipids and macromolecules are degraded and released nutrients are relocated to developing parts of the plant, such as young leaves, stems, flowers, siliques and ultimately seeds that are dependent on this nutrient remobilization. LÄS MER
2. Discrete element simulation of elasto-plastic shock waves in high-velocity compaction
Sammanfattning : Elasto-plastic shock waves in high-velocity compaction of spherical metal particles are the focus of this thesis which consists of four papers (A-D). The compaction process is modeled by a discrete element method while using elastic and plastic loading, elastic unloading and adhesion at contacts. LÄS MER
3. From green to yellow : a leaf story
Sammanfattning : När ett blad gulnar genomgår det både morfologiska och metaboliska förändringar. Denna process benämns senescence och en förbättrad förståelse av dess mekanismer är viktiga både ur ett grundvetenskapligt perspektiv och för potentiella bioteknologiska applikationer. LÄS MER
4. The Cursed Leaf : An Anthropology of the Political Economy of Cocaine Production in Southern Colombia
Sammanfattning : In this study, Oscar Jansson explores the relations mediating the distribution of surplus value in the sub-capitalist environment of cocaine production in Putumayo, Colombia. Analyzing the groups of actors in the chain of production in the tropical periphery, the study asserts that the transfer of surplus value from the peasant producers at the bottom of the cocaine economy to a significant extent is mediated by violence inflicted by paramilitary groups. LÄS MER
5. Morphological and chemical leaf traits of tropical montane tree species and their responses to warming
Sammanfattning : Leaf morphological and chemical traits of tropical trees vary along climate gradients, but it is currently unclear how they will respond to a rapidly warming climate and how this will vary among species. Considering this, tropical trees native to East and Central Africa were investigated in three complementary studies in Rwanda. LÄS MER