The dissociative chemisorption of a molecule on a transition metal surface represents a rate-limiting step in many heterogeneously catalyzed processes, whereby most chemicals are made. In spite of the importance of this reaction, an accurate first principles approach to modeling it does not yet exist.…

The research of the Van Eck Group focusses on 3 interconnected research lines: 1) Identification and therapeutic targeting of key pathways/regulators in macrophages essential for prevention of atherosclerotic lesion development or stimulation of regression of existing lesions, 2) Atherosclerosis as…

Promotores: Prof.dr. H.J.M. de Groot, Prof.dr. J. Matysik (Universitaet Leipzig)

How are the building blocks of life formed?

Promotor: H.J.A. Röttgering, Co-promotor: G.K. Miley

Methods for accurately computing the interaction of molecules with metal surfaces are critical to understanding and thereby improving heterogeneous catalysis.

The Dutch-Japanese made DESHIMA instrument has passed its first practical tests when measuring the distances and ages of distant galaxies. The core of the instrument is a chip the size of two euro coins that measures 49 shades of far infrared light. The developers of the spectrometer publish the results…

The effectiveness of the skin barrier underlies the outer layer of the skin: the stratum corneum (SC). However, in several skin diseases this barrier is impaired. In two inflammatory skin diseases, atopic eczema and Netherton syndrome, an increased level of monounsaturated fatty acids (MUFAs) has been…

Health psychologist Andrea Evers has been invited by several Dutch and international media to talk about the coronavirus and the measures taken by the government with regard to public health.

It's now possible to measure how many plastic particles there are in our food. Chinese scientists and Leiden professor Willie Peijnenburg applied their new method to lettuce and wheat. Their results were published January 20 in Nature Nanotechnology.

Lecture

In many student cities, the number of corona infections grows, and in Leiden we can also see rising figures. Especially in student housing, it is sometimes difficult to keep your distance, how do you do that? We asked students about mutual agreements in their student housing.

The Dutch temporary bridging measure for self-employed professionals (known as Tozo) was set up to help Dutch self-employed professionals who are experiencing financial difficulties due to the Covid-19 pandemic. Last week, the ombudsman announced an investigation into the scheme for the self-employed.…

This week, several media reported on a confidential research report in response to internal investigation into the working environment at the Institute of Education and Child Studies. The Board of the Faculty of Social and Behavioural Sciences wants to repeat its commitment to a safe working environment…

The Copenhagen interpretation of quantum mechanics states that a measurement collapses a wavefunction onto an eigenstate of the corresponding measurement operator.

PhD Defence

You check out Facebook to see if one of your friends or someone in your family has done something interesting. Your attention is drawn to a holiday advert. That’s a coincidence, you think, because just before you went to Facebook you had been searching internet for a holiday destination. But this is…

This long term project in Jordan is at the basis of many specialists’ studies and has several off-shoot projects. The project, with its many approaches, is also a framework for much teaching in Levantine Archaeology at Leiden University, especially concerning fieldwork methods, artefact studies, research…

Large carnivore population is globally declining as a result of the fragmentation of habitat, large prey depletion and retaliatory killing by pastoralists.

Can animal venoms yield novel antimicrobial peptides?

We study the interplay of topology and geometry with chirality for several passive and active systems, employing both analytical and numerical methods.

Promotor: H.J.M. de Groot, Co-Promotor: A. Alia

Promotores: S.F. Portegies Zwart, E. M. Rossi

Promotor: M.T.M. Koper, Co-Promotor: L.B.F. Juurlink

Promotor: A. Doelman, Co-promotor: V. Rottschäfer

How is structural and functional brain development related to behavioral change in cognitive-control, impulse regulation, and socio-emotional functioning?

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

Consequences for sediment stability and seston trapping

Atherosclerosis is a chronic inflammatory disease affecting millions of people world-wide.

Within this project, PeptoMiktoStars were realized through an orthogonal protecting group strategy and should be investigated further regarding their potential as drug delivery systems in the field of drug delivery to inflamed areas in cancer, bacterial infections or autoimmune diseases.

Cathodic corrosion is a relatively unknown phenomenon that can severely etch metallic electrodes at cathodic (negative) potentials.

Promotor: K.E. Schalm, Co-promotor: S.S. Lee

The research aim of the Catalysis and Surface Chemistry group headed by Prof. Marc Koper is to probe and understand chemical reactions on well-defined, mostly single crystalline, surfaces at the molecular level.

Advanced sensing techniques require graphene with high quality and well-controlled surface chemistry.

To what extent did the street patterns in urban districts influence crime patterns?

Promotor: S.M. Verduyn Lunel, Co-Promotores: S.C.Hille, O.W. van Gaans

Assessing the effects of landscape and land-use changes on the visibility of archaeological landscapes in Central-Southern Italy.

How did Angkor interact with regional urban centers? How did the settlement system impact the society's agricultural system and regional resilience?

Do offshore windfarms affect the local biodiversity of the pelagic fish community and are fish deterred or attracted by sounds?

Promotor: Prof.dr. T.J. Aartsma, Co-promotor: R.N. Frese

At the Faculty of Science, forty per cent of the employees are of a non-Dutch nationality. Amongst PhDs that is even sixty per cent. How are they doing in a time of working at home in a different culture, when travelling is not possible? Biologist Astri Kusumawardhani is the second in this series to…

All acute care staff at Leiden University Medical Center have received their first and sometimes even their second dose of the coronavirus vaccine. But how long will you be protected after vaccination and what does the genetic material of the virus do in the vaccine? Our virologists Ann Vossen and Leo…

Why have some European countries responded faster to the coronavirus outbreak than others? While in some countries the lockdown had already been declared when relatively few cases were known, others did not take action until thousands of people were already infected and hundreds were already dead. What…

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.

Hot astrophysical plasma is ubiquitous in the Universe, from comets in our Solar system to the largest scale structures -- the cosmic web filaments. These hot plasmas, with the temperature of a few millions of degrees, are often observed in the X-ray wavelength range.

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.

In several Mediterranean regions archaeological sites have been mapped by fieldwalking surveys, producing large amounts of data. These legacy site-based survey data represent an important resource to study ancient settlement organization. Methodological procedures are necessary to cope with the limits…

Plants and their pollinators form complex interaction networks. Within these networks, species differ widely in the number of species they interact with.