We simuleren interstellaire wolken met speciale plasma-expansies en chemische reacties op ijzige stofdeeltjes in ultrahoogvacuümopstellingen. Dit levert gegevens die nodig zijn om astronomische waarnemingen te interpreteren en de reactienetwerken in de ruimte te modelleren.

Commerciële bedrijven die gebruik willen maken van de expertise en faciliteiten worden doorverwezen naar LAB , de commerciële eenheid die verantwoordelijk is voor gespecialiseerd laboratoriumwerk.

Astronomical observations of cold regions in the universe show a rich inventory of ices. Part of these ices may end up on planets like our own, but in that journey they will be exposed to considerable amounts of radiation.

The Standard Model (SM) of particle physics fails to explain several observed phenomena and is incomplete. In order to resolve this problem, one may extend the SM by adding new particles.

In this thesis, we present new laboratory data of interstellar dust analogues.

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.

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

Laboratory, observation and modeling work on the dissociation of polycyclic aromatic hydrocarbons in interstellar environments and the formation of new molecular species through the fragmentation process.

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

Promotor: H.V.J. Linnartz

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

Promotie

In this thesis chemical and physical processes in the ice mantles on interstellar dust grains are studied.

This thesis combines field and laboratory studies to address some of the most pressing questions in the field of microplastic research.

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In previous studies at our laboratory it was demonstrated that drug exposure of HepG2 cells can lead to an altered TNFα-induced NF-κB oscillatory phenotype, concurrent with a synergistically increased sensitivity for TNFα-induced apoptosis.

The next generation of high-contrast imaging instruments on space-based observatories requires sophisticated wavefront sensing and control in addition to a high-performance coronagraph.

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

Promotores: P.G.L. Klinkhamer, P.M. Brakefield, Co-Promotor: M. Bruinsma

Promotie

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

Promotores: W.J.G.M. Peijnenburg, G.R. de Snoo, Co-promotor: M.G. Vijver

Promotie

Promotie

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…

This thesis is largely an experimental study on the formation of solid-state simple and complex organic molecules in the H2O-rich and CO-rich ice phases of dense interstellar clouds and dark cores.

Acidobacteria is a widely distributed phylum but their functional roles in ecosystem processes are still largely elusive.

Promotor: Christoph U. Keller, Co-promotores: Matthew A. Kenworthy, Frans Snik

Promotores: Prof.dr. P.M. Brakefield, Prof.dr. B.J. Zwaan (Wageningen Universiteit)

Promotor: T. H. Oosterkamp

Filamentous Actinobacteria, such as Streptomyces, produce a plethora of chemically diverse bioactive metabolites that have found applications across medicine, agriculture and biotechnology.

Agrobacterium tumefaciens, a gram-negative plant pathogen belonging to the family Rhizobiaceae, is the causative agent of crown gall disease, which can affect many plant species including agronomically important ones.

Beenderen bevatten informatie over het leven van een persoon, zoals zijn herkomst, leeftijd bij overlijden en aan welke ziektes hij leed. Wetenschappers kunnen hieruit veel herleiden over het leven van die persoon en de ontwikkeling van de mens. Dit biedt aanknopingspunten voor het oplossen van problemen…

Wiskunde en Natuurwetenschappen, Instituut Biologie Leiden (IBL)

What are the global relationships between environmental conditions and abundance of distinct types of mycorrhizal fungi in soil and plant roots?

Creating a framework to assess the sustainability of fish farms which will set sustainability standards and give consumers information about the the sustainability and safety of their seafood.

It is an established fact that the Standard Model has to be extended to explain the so-called Beyond the Standard Model (BSM) phenomena: dark matter, matter-antimatter asymmetry of the Universe and neutrino flavour oscillations.

Plants are colonized by an astounding number of microorganisms that can provide different life-support functions, including nutrient acquisition and protection against (a)biotic stresses like drought or pathogen attack.

This thesis describes the development and validation of new high-contrast imaging techniques, with the ultimate goal of enabling the next generation of instruments for ELT-class telescopes to directly image Earth-like extra-solar planets orbiting around nearby stars.

In de wetenschap is het van vitaal belang dat meerdere studies hetzelfde resultaat onderschrijven. Onderzoekers moeten daarom alle details van eerdere experimenten kennen om de procedures zo exact mogelijk uit te kunnen voeren. Dit is echter een steeds groter probleem in de neurowetenschappen. Het is…

What would be the environmental performance of the Carbon4PUR technology at industrial scale in the future?

Rachel Schats is Assistant Professor in Human Osteoarchaeology in the Faculty of Archaeology, Leiden University.

Osteoarcheologen helpen forensische wetenschappers bij het oplossen van misdaden en onderzoeken ook botmateriaal uit de Tweede Wereldoorlog om slachtoffers te identificeren.

Het vermogen om voorwerpen en bouwsels met de hand te maken, is essentieel geweest voor de ontwikkeling van de mens. De moderne samenleving dreigt dat vermogen te verliezen. Leidse archeologen verzamelen kennis over processen van ‘maken en creëren’ door de eeuwen heen. Die kennis helpt onze huidige…

Wiskunde en Natuurwetenschappen, Leiden Academic Centre for Drug Research (LACDR)

In this project innovative technology for photovoltaics cells is developed and analysis of ecological and health related risks are explicitly accounted for.

How can we quantify the density of species within a community through environmental DNA concentrations?