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Université de Neuchâtel

Two birds, one stone : essays on the values of Swiss forest ecosystem services

Borzykowski, Nicolas ; Zarin, Milad (Dir.) ; Baranzini, Andrea (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2017 ; 2663.

Forests provide several valuable services to the Swiss population such as wood, recreational opportunities, carbon sequestration and habitat for biodiversity, among others. Since wood exploitation contributes to forests maintenance, it is acknowledged that a reasonable intensification of wood harvest would benefit other forest ecosystem services in Switzerland. In addition, because of its CO...

Université de Neuchâtel

Geogenic arsenic in groundwater of Burkina Faso

Bretzler, Anja Maria ; Schirmer, Mario (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2018.

In the semi-arid West African Sahel belt, rural populations often rely on groundwater from fractured aquifer systems for their drinking water needs. Recent evidence has shown that some tube wells in northern Burkina Faso are affected by arsenic (As) concentrations above the World Health Organisation’s (WHO) 10 μg/L guideline value. Arsenic is hypothesised to stem from geogenic (naturally...

Université de Neuchâtel

Oxidative stress in sperm competition games : experimental tests of the soma vs. germline allocation trade-off in wild house sparrows "Passer domesticus"

Rojas Mora, Luis Alfonso ; Helfenstein, Fabrice (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2016.

Female promiscuity leads to the situation where ejaculates of two or more males compete for the fertilization of the ova. Therefore, the reproductive success of a male largely depends on its ejaculate quality, and thus sperm competition exerts strong selection into traits that maximize the fertilizing ability of an ejaculate. Theory predicts that males should progressively increase resource...

Université de Neuchâtel

Resistance elements of small grain cereals against Fusarium head blight and contribution of Health Promoting Compounds

Martin, Charlotte ; Mauch-Mani, Brigitte (Dir.) ; Mascher, Fabio (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2017.

Fusarium head blight FHB is one of the main cereal disease. FHB is caused by the complex of Fusarium pathogens and results in significant yield losses and contamination of grain with mycotoxins. These toxins constitute a substantial risk to human health and a threat for food safety. The most dominant toxin is deoxynivalenol (DON), produced by F.gramineraum. The use of resistant...

Université de Neuchâtel

Approaches for cloudification of complex high performance simulation systems

Lapin, Andrei ; Kropf, Peter (Dir.) ; Felber, Pascal (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2017.

Scientific computing is often associated with ever-increasing need for computer resources to conduct experiments, simulations and gain outcomes in a reasonable time frame. While local infrastructures could hold substantial computing power and capabilities, researchers may still reach the limit of available resources. With continuously increasing need for higher computing power, one of the...

Université de Neuchâtel

Factors that determine the effectiveness of entomopathogenic nematodes in combination with other beneficial soil organisms to control root herbivores

Chiriboga Morales, Xavier ; Turlings, Ted (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2017.

Belowground ecosystems are inhabited not only by organisms that represent a threat to plants (e.g. root herbivores and pathogens), but also by organisms that provide protection to these antagonists (e.g. entomopathogenic nematodes, mychorrizal fungi and root associated bacteria). Herbivore-induced root volatiles, such as the sesquiterpene E-(β)-caryophyllene, are an indirect defense in...

Université de Neuchâtel

Conception, synthèse et étude de "tris"-fullérodendrimères et rotaxanes liquides-cristallins

Pieper, Pauline ; Deschenaux, Robert (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2017.

The aim of this thesis work is to combine self-organizing liquid-crystalline dendrimers with isotropic components, such as C60 and rotaxane to create complexes supramolecular architectures of interests for optoelectronic applications. This work is intended to rationalize the relation between molecular design and liquid-crystalline properties, with emphasis on the influence of isotropic...