This thesis is an experimental study of the UV irradiation of the interstellar ice analogues, relevant for the different stages of the star and planet formation sequence.

Phospholipase A/acyltransferase 3 (PLAAT3) and PLAAT4 are enzymes involved in the synthesis of bioactive lipids. Despite sequential and structural similarities, the two enzymes differ in activity and specificity.

Promotor: Prof.dr. H.L.V. Linnartz

This thesis revolves around the electronic spectroscopy of molecules in the laboratory and the search for the carriers of the diffuse interstellar bands (DIBs).

Catalysis is of extreme relevance in the production of everyday materials and plays a central role in many aspects of our life.

Promotor: Prof.dr. E. Smets, M. Stech

Promotor: Prof.dr. E.F. Smets, Co-Promotor: L.W. Chatrou

Promotor: Prof.dr. H.P. Spaink, Co-promotor: Dr. B.E. Snaar

Large areas of space are filled by molecular clouds that consist of gas and dust grains that are the remnants of dead stars. When these clouds start collapsing, the decreasing temperature and increasing density cause gas particles to start accreting onto dust grain surfaces.

Op 11 november organiseerde de bacheloropleiding Molecular Science and Technology een corona-proof diploma-uitreiking met een bijzondere afstudeerder: de 18-jarige Ruard van Workum. Al van jongs af aan ontwikkelde Ruard een passie voor scheikunde. Hij begon op 15-jarige leeftijd met de opleiding Molecular…

The long-held desire - to link structure directly to function and to explain molecular mechanisms based on basic chemical or physical principles - is finally coming closer, satisfying not only our scientific curiosity but also offering new solutions to the many challenges in the field of health, energy…

This thesis is about the study of hydrocarbons via infrared spectroscopy.

Promotor: F.P. Israel, Co-Promoter: R. Meijerink

Mechanical forces are known to play an important role in bacterial colonies. In this dissertation, we study the self-organization at various stages of growing bacterial colonies, and focus on the mechanical effects of cell growth.

The formation and evolution of galaxies is fundamentally driven by the formation of new stars out of cold gas.

Promotor: H.V.J. Linnartz

This thesis describes a study from both a theoreticaL and an experimental point of view.

Several techniques are explored for going beyond the born-oppenheimer static surface model for molecule-surface reactions.

Promotor: Prof.dr. E. F. van Dishoeck

Hybrid zones occur where two species meet and produce offspring (hybrids). Typically, hybrids show a considerable reduction in fitness. In this thesis two hybrid zones are treated.

Promotor: Prof.dr. E. Bouwman, Co-Promotor: S. Bonnet

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Organic molecules in interstellar space are important as they influence the structure of galaxies and star formations. Studying catalytic processes in space allows us to understand how molecular species are formed and chemically evolved in the interstellar medium and solar system objects.

With increasing carbon dioxide levels in the atmosphere and their detrimental effect on the global climate, modern society needs to push for more renewable energy sources. Storing widely accessible and abundant solar energy in chemical bonds in the form of molecular fuel via artificial photosynthesis…

This thesis presents pioneering work on the panchromatic emission of some of the most luminous galaxies in the early Universe: star forming galaxies and active galactic nuclei.

Metals surfaces form a group of effective catalysts for the reaction of small molecules such as hydrogen (H2).

De master Biology is een samenwerking tussen het Instituut Biologie Leiden, Naturalis en het Centrum voor Milieuwetenschappen Leiden waardoor het programma een brede en diverse scope heeft. De opleiding biedt zeven specialisaties, waarvan vier researchspecialisaties die nauw verbonden zijn met het onderzoek…

Promotor: J. Schaye

Promotor: Huub J.M. de Groot, Co-promotor: Francesco Buda

Promotor: R.C.M. Pelger Co-Promotor: G. van der Pluijm

Trigonostemon Blume is a plant genus in the family Euphorbiaceae comprising 59 species.

Promotor: Prof.dr. P.C. van Welzen

In this work, we illustrate unconventional approaches towards the fabrication of edge functionalized graphene nanostructures and bidimensional architectures in polymeric and metallic supports, with an outlook towards molecular sensing devices.

Polycyclic aromatic hydrocarbons (PAHs) are the most abundant class of organic compounds in space. The PAH field evolves from the constant interaction between experimentalists, theorists, modellers and observers. While laboratory research and quantum chemical calculations together set up the molecular…

Promotor: M. Ubbink, Co-promotor: G. Siegal

In the search for sustainable energy solutions, the idea of artificial photosynthesis has been proposed as an approach with which to use water and sunlight to produce hydrogen.

This thesis takes steps toward understanding the interaction between gas-phase and solid-state molecules in star- and planet-forming regions.

Promotor: Prof.dr. E. Bouwman, Co-promotor: S. Bonnet

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