Promotor: Prof.dr. G.J. Kroes

The dissociative chemisorption of methane on metal surfaces is of fundamental and practical interest, being a rate-limiting step in the steam reforming process. The reaction is best modeled with quantum dynamics calculations, but these are currently not guaranteed to produce accurate results because…

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

The dissociation of CH4 into CH3 + H on a metal surface is the rate determining step in processes which produce hydrogen, such as steam reforming and catalytic partial oxidation. Ultimately, we want to study the dissociation of methane on Ni(111) and Pt(111) quantum mechanically while taking into account…

The main goal of the THEOR CHEM group, headed by Prof. Geert-Jan Kroes, is to achieve the ability to predict the outcome of chemical reactions involving hydrogen from first principles. This goal is important in almost all fields of chemistry and in many fields of physics.

How can we make make accurate predictions for reactions of molecules on metal surfaces?

A full overview of THEOR PhD theses.

Nonadiabatic energy transfer from the translational motion (T) of a molecule impinging on metal surface to the metal’s electrons may determine whether the molecule can lose enough energy to adsorb or react.

This perspective addresses four challenges facing theorists whose aim is to make quantitatively accurate predictions for reactions of molecules on metal surfaces, and suggests ways of meeting these challenges, focusing on dissociative chemisorption reactions of H2, N2, and CH4.

Unfolding potential

Molecular Physiology is a research group at the Leiden Institute of Chemistry, headed by Prof. Mario van der Stelt. The research aim is to design, synthesize and apply new chemical tools to answer important biological and medical questions. We use activity-based protein profiling, assay development,…

In the thesis the dynamics of strategies is studied from two perspectives.In the first part of the thesis strategies are considered to be opinions present in a community.

Koper

How do you fit two meters of DNA in a tiny compartment and at the same time are able to access the right parts of it at the right times?

The research presented in this thesis makes use of small molecules (as H2 , D2 and O2 ) on well-defined single crystal surfaces (flat Pt(111), flat Cu(211) and curved Pt(111)) to elucidate the role of surface structure and degrees of freedom in the reactant in specific surface reactions.

Chemistry is all around us: from nutrition and smartphones to medicine. The field is developing rapidly, as the world population continues to grow and resources become scarce. MST will educate you on the basics of working towards a clean and healthy world.

In this thesis, dynamic testing principles were applied to examine young children's potential for learning. Our studies focused on the role of cognitive flexibility, to further increase our understanding of the cognitive processes involved in children's ability to learn from instruction and feedback,…

An assessment approach that tailors to children’s instructional needs

In the master’s specialisation Molecular Genetics and Biotechnology at Leiden University students are trained by experts in the areas of molecular biology, microbiology, plant genetics, cellular imaging, animal disease models, and various –omics technologies and the corresponding bioinformatics.

Promotor: J.N. Kok, P.E. Slagboom Co-promotor: J.F.J. Laros

Actin Polymerization and Membrane Physics in Living Cells: Analysis of cell spreading mechanisms

Can dynamic testing provide us with insight in children’s potential for learning?

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.

BlaC is the β-lactamase of Mycobacterium tuberculosis. We show that it can recover from inhibition by clavulanic acid and that phosphate helps it do so.

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 provides an overview of the development of the Pair Configuration to Molecular Activity Coefficient (PAC-MAC) model.

Promotor: Prof.dr. S.F. Portegies Zwart, Co-promotor: D.C. Heggie

Chemical reactions go hand-in-hand with an energy exchange with the environment in which they take place. Surfaces offer a variety of energy dissipation channels, constituted by the nuclear and electronic degrees of freedom of the atoms at the interface. Aiming at an improved future harvesting of energy,…

Chemical reactions go hand-in-hand with an energy exchange with the environment in which they take place. Surfaces offer a variety of energy dissipation channels, constituted by the nuclear and electronic degrees of freedom of the atoms at the interface. Aiming at an improved future harvesting of energy,…

The research of our group is centered around dynamical systems, functional analysis and their interplay.

If gifted children are experts in using strategies, why do they experience problems with learning? Why do they underachieve?

Dynamic nuclear polarization with paramagnetic agents can enhance nuclear magnetic resonance signals by orders of magnitude. The mechanism of enhancement depends a.o. on the magnetic resonance properties of the agents used. Electron spin relaxation times at NMR relevant magnetic field/microwave frequencies,…

The research of this programme is centered around dynamical systems, functional analysis, and their interplay.

Ab de Jong, professor of Comparative Religion, was appointed as the new the academic director of the Leiden Institute for Area Studies (LIAS) with effect from 1 September. We asked him about his plans for the future of the LIAS.

The genomic DNA of every organism is organized and compacted in order to fit inside the cell. This is achieved by the joint action of numerous architectural proteins that aid in folding the genome. Genome folding is tightly interconnected with transcription, with genes in certain regions being silenced,…

Promotor: W.Th.F. den Hollander

This research group is interested in the physics of living cells, especially their cytoskeleton dynamics under defined external stimuli.

Promotor: Prof.dr. W.Th.F. den Hollander, Co-promotor: R. Fernandez

Promotor: J.W. van Holten

What is the relationship between outcomes of dynamic testing and cognitive flexibility in young children?

Promotor: Huub de Groot, Co-promotor: Francesco Buda

With the energy transition toward a renewable energy supply and a CO2-neutral economy, electrification of the energy system is rising in importance, which leads to the challenge of long-term storage of renewable electricity.

John van Noort

Promotor: Prof.dr. H.V.J. Linnartz, Co-Promotores: S. Ioppolo, H.M. Cuppen

Does a moving hybrid zone leave a genomic footprint?

This functional genomics project aims at understanding the biology of the underlying mycelium differentiation and autolysis processes in much more detail.