A remarkable population of short period transiting rocky exoplanets with equilibrium temperatures on the order of 2,000 K has recently been discovered.

Wetenschappers bij de Leidse Sterrewacht onderzoeken de oorsprong van sterren en hun planetenstelsels. Ze detecteren en karakteriseren planeten rondom andere sterren (exoplaneten). Ze onderzoeken hoe sterren en planeten ontstaan. En ze volgen moleculen van interstellaire wolken tot planetenstelsels…

The thesis describes terrestrial field trials aimed to detect side-effects of pesticides within the framework of pesticide registration procedures. Field trials were developed using vascular plants Brassica napus and Poa annua, caterpillars Pieris brassicae and effects on decomposition were studied…

This thesis addresses the chemical processes that determine the compositions of giant planet atmospheres.

Promotor: Prof.dr. M. Schilthuizen

Over the past years it has been discovered that the population of extra-solar planets is large and diverse.

Promotores: Prof.dr. A.G.G.M. Tielens, Prof.dr. L.B.F.M. Waters (UvA), Prof.dr. C. Dominik (UvA)

This thesis discusses the physical and chemical processes than influence the composition of forming planets.

Promotor: Prof.dr. W.J.G.M. Peijnenburg

This thesis examines the link between simple molecules and the underlying structure and chemistry within protoplanetary disks - the birthplaces of planets.

The focus of this thesis is how stars like our Sun and planets like Jupiter, Saturn, and Earth are formed.

Promotores: J.A.van Veen, P.L.G.Klinkhamer. Co-promotor: E.E.Kuramae

The filamentous bacteria Streptomyces are widespread inhabitants of terrestrial soils.

Promotor: I. Snellen, Co-Promotor: M. Kenworthy

A large diversity of exoplanetary systems has been found, but it is still unclear what drives this diversity.

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

Planets are formed in disks of gas and dust around young stars.

This thesis focuses on protoplanetary disks: flattened structures of gas and dust around young stars in which planets are expected to form and grow.

Promotores: Prof.dr. E.F. van Dishoeck, Prof.dr. C.P. Dullemond

Wetland plants are distinguished from plants of other terrestrial ecosystems by their adaptations to specific habitat stresses, including waterlogged and flooding and the subsequent abundance of phytotoxic compounds.

Promotie

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.

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.

The thesis addresses the long-term dynamical evolution of hierarchical multiple systems.

Circumstellar discs are the reservoirs of gas and dust that surround young stars and have the potential to become planetary systems.

Hoe kan de methode om de gecombineerde effecten van metaal-gebaseerde chemische stoffetn te bepalen worden verbeterd?

What are trait-trait relationships in wetlands? To what extent the so-called leaf economics traits deviate from terrestrial ecosystems? How traits specific to wetland plant relate to plant strategies? What’s the relationship between wetland plant traits to the ecosystem functioning (e.g. productivity,…

Promotor: Prof.dr. A.G.G.M. Tielens, Prof.dr. C. Dominik (UvA)

Lezing

Promotores: Prof.dr. H. van Veen & Prof.dr. W. de Boer (Wageningen University)

Does a high quality prairie restoration in an urban/agricultural landscape provide invertebrates necessary for a sustainable ecosystem?

Promotores: Prof.dr. W.J.G.M. Peijnenburg & Dr. M.G. Vijver

Promotor: Prof.dr. H.P. Spaink, Co-promotor: Dr. M. van der Zee

The lysosomal β-glucosidase named glucocerebrosidase (GCase) is a retaining β-glucosidase that hydrolyzes the glycosphingolipid glucosylceramide (GlcCer) to ceramide and glucose at acid pH.

Lezing

This thesis describes the Multi-site All-Sky CAmeRA (MASCARA), which consists of two small robotic telescope designed to detect exoplanets around the brightest stars in the sky.

My work focuses on a class of astronomical objects called protoplanetary disks.

To address the fundamental questions of how life on Earth emerged and how common life may be in the Universe, it is crucial to know the chemical composition of the planet-forming material.

Promotor: H.V.J. Linnartz

Which traits and/or trade-offs determine benefits of being deciduous or evergreen?

Promotor: G.R. de Snoo, Co-promotor: H.H. de Iongh, C.J.M. Musters

Promotor: Prof.dr. H. J. A. Röttgering, Co-Promotor: M. Haverkorn

De lezing vindt plaats op woensdag 29 mei 2013 en is getiteld ‘Building stars, planets and the ingredients for life between the stars’. De Halley Lecture aan de Universiteit van Oxford is opgericht door de wijlen Henry Wilde, bij de terugkomst van de comeet Halley in 1910. De lezing wordt jaarlijks…

Lezing, This Week's Discoveries

Growing planets one dust grain at a time

Astronoom Ignas Snellen besprak in Nature de opzienbarende ontdekking van zijn internationale collega's: een dwergster met zeven, op de Aarde lijkende planeten eromheen. Mogelijk zijn de omstandigheden er geschikt voor leven. Ook diverse media vroegen Snellen om commentaar.

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

How can mega sand nourishments, such as the Sand Motor, be designed and managed for optimal ecosystem services provision ?

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

What is the effect of light at night on plant phenology and physiology, and how does this affect plant interactions with other species?