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.

Mechanical metamaterials are man-made materials which derive their unusual properties from their structure rather than their composition.

Fundamental understanding of molecular reactions on metal surfaces is important for improving heterogeneous catalysis.

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

Studievoorlichting

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

Tijdens de studie Molecular Science & Technology leren studenten te werken aan schonere en efficiëntere processen en worden zij opgeleid om nieuwe technologieën te ontwikkelen als antwoord op de uitdagingen van de toekomst: de groeiende vraag naar nieuwe producten en milieuvriendelijke processen. Bij…

Bij de bacheloropleiding Molecular Science & Technology aan de Universiteit Leiden ontwikkelen studenten een sterke theoretische basis in de scheikunde en doen ze kennis van de technologische toepassingen op. Daarnaast leren studenten een bijdrage te leveren aan vraagstukken op het gebied van duurzaamheid,…

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

Deze opleiding integreert genetica, moleculaire biologie en biotechnologie in een aantrekkelijk programma met uitstekende carrièreperspectieven.

Hoe kunnen we chemische processen nog efficiënter maken? Hoe ziet ons gebruik van brandstoffen eruit in de toekomst? Kunnen we door middel van de kennis van de chemie van de mens nog betere medicijnen maken? Zullen we ooit ziektes compleet kunnen uitbannen?

Molecular complexes can be used as electrocatalysts for oxygen reduction, water oxidation, and/or hydrogen peroxide production.

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

Deze opleiding biedt de mogelijkheid om onderzoek op moleculair, cellulair en organismaal niveau te verenigen, maar biedt ook de mogelijkheid om je te specialiseren op één van deze niveaus.

Wiskunde en Natuurwetenschappen, Instituut Biologie Leiden (IBL)

Ingen

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

Phosphorylation affects all four major biomolecules – proteins, lipids, carbohydrates and nucleic acids – and plays a pivotal role in the most fundamental cellular functions.

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.

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

Promotor: G.F.A. Kersten, W. Jiskoot, Co-promotor: B. Metz

Before the large scale use of renewable energy sources can be implemented in our society, the storage of electrical energy needs to be tackled. Storage the energy as hydrogen via the reduction of protons is a good option.

Atoms and molecules are the basic units of matter. If we keep dividing a bar of gold or a glass of water into smaller parts, at the end we are left with a single gold atom or a water molecule.

Promotor: Prof.dr. G.J. Kroes

The research described in this thesis has, using the zebrafish as a model system, shed new light on the intricate relationship between TB and DM2, in particular on the role of leptin, SHP-1 and glucocorticoids.

Wiskunde en Natuurwetenschappen, Instituut Biologie Leiden (IBL)

Wiskunde en Natuurwetenschappen, Instituut Biologie Leiden (IBL)

We have examined sequences from the ligand-binding domain of the nicotinic acetyl choline receptor (nAChR) in 148 vertebrate species. We are in interested in this receptor because the α-neurotoxins of many venomous snakes binds to this receptor in its location at the neuromuscular junction in all ve…

Metal complexes and 2D materials like graphene were combined to produce structures that can function as sensors.

The clinical potential of applying synthetic lethality to cancer treatment is famously demonstrated by the BRCA1/PARP1 paradigm: a tumor specific defect in BRCA1 – a component of the DNA double-strand break (DSB) repair pathway homologous recombination (HR) – results in a remarkable sensitivity to PARP1…

Stars like the sun are born in large molecular clouds existing from gas and dust. During the formation process, the chemical composition of the material can be altered drastically by the changing physical conditions.

Promotor: Prof.dr. E.F. van Dishoeck, Co-Promotor: G.J. Herczeg

Promotor: J. A. Bouwstra

Supervisor: P.J.J. Hooykaas Co-Supervisor: R. Offringa

The explosive radiation and diversification of the advanced snakes (superfamily Colubroidea) was associated with changes in all aspects of the shared venom system. Morphological changes included the partitioning of the mixed ancestral glands into two discrete glands devoted for production of venom ormucous…

Promotor: Prof.dr. J. den Hertog

The electrochemical oxygen reduction reaction (ORR) is an essential half-reaction for the utilization of hydrogen as a sustainable fuel, via the conversion of hydrogen to electrons and protons facilitated by the ORR. In the most common fuel cells, the ORR is requires high loadings of non-abundant platinum…

Kros

Promotie

The thesis explores how interstellar chemistry evolves as a function of time and changing physical architectures during the formation of stars.

This thesis presents the first synthetic peptides ADP-ribosylated on serine, threonine, tyrosine, arginine and cysteine.

Indonesia is experiencing various environmental challenges related to its fast economic growth. Therefore, it is necessary to have measurable and applicable indicators to obtain accurate data and information regarding the costs of adverse environmental impacts arising from economic activities to support…

Promotor: G.P. van Wezel, Co-promotor: D. Claessen

In this dissertation iron-based homogeneous catalysts were synthesized, characterized and investigated for water oxidation activity.

Promotor: J.M. van Ruitenbeek, Co-Promotor: S.J. van der Molen

I will give a general introduction to the field of molecular electronics, its history, methods and challenges. I will also introduce the subject of my investigation and provide a brief outlook to the remainder of our thesis.

The space between the stars isn't simply a void; it also contains substances such as methanol and carbon dioxide. So far, chemical theories have been unable to explain how these substances originate under circumstances that should make it impossible. Fedor Goumans has been awarded a Veni subsidy to…