Plants are constantly exposed to various environmental stressors. Pathogen infections causing disease can affect economically important crops and impact global food production. To counter disease development and spread, it is imperative that we acquire a thorough knowledge of its pathogenesis, as well as of the mechanisms underlying plant immune response. …
This thesis presents studies of probability of heterogeneous recombination of oxygen and hydrogen atoms on surfaces of different types of carbon-based materials. The probability of heterogenous recombination is described with a quantity called recombination coefficient, which is defined as the probability that an atom which impinges upon a solid surface …
This thesis presents studies of ultrafast carrier relaxation dynamics in charge density wave (CDW) materials by means of femtosecond time-resolved optical spectroscopy. In these experiments, a femtosecond pump pulse excites electrons via interband transitions, thereby changing the optical properties of the material. The dynamics of relaxation processes is then recorded …