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

Promotor: S.M. Verduyn Lunel, Co-promotor: O. van Gaans

Balsaminaceae is a diverse plant family characterized by a huge floral morphological diversity.

The soil-dwelling, filamentous bacteria of the genus Streptomyces are renowned for their production of useful secondary metabolites including antibiotics. The work described in this thesis provides new insights on the role and regulation of antibiotic production and resistance in these bacteria.

Promotor: Prof.dr. M. Schilthuizen

The growing demand of energy indicates that global energy resources in the form of fossil fuels will not be sufficient in the future. In order to solve potential future energy problems development of a sustainable hydrogen economy is highly desirable.

Promotor: S.M. Verduyn Lunel, Co-promotor: O.W. van Gaans

To gain more insight into the evolutionary development of orchid flowers and fruits, the orchid species Erycina pusilla was studied. The evolutionary origin of the median petaloid sepal, the callus on the labellum, and the stelidia was studied.

Sustainable energy from wind and solar is most readily available near the sea.

Promotores: Prof.dr. M. Franx, Prof.dr. P.G. van Dokkum (Yale University)

Promotor: Prof.dr. H.J.A. Rottgering

Promotor: H.J.A. Rottgering, Co-Promotor: R.J. van Weeren

This thesis investigates the structural evolution and assembly of galaxies since the first few billions years after the big bang.

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

Plants produce an astonishing variety of secondary metabolites (SMs) which are thought to play vital roles in the fitness of plants through ecological interactions.

Pulsars were first discovered in 1967 and since then the population has grown and expanded over several wavelengths.

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

Promotor: Prof.dr. E.F. Smets

Promotor: Prof.dr. P.G.L Klinkhamer, Co-promotor: K. Vrieling

The logic seems inescapable indeed. The bigger the population, the higher the probability it contains an Einstein. Hence, bigger populations are more likely to develop complex culture.

Evolutie is elke dag om je heen. Dat is de boodschap van de nieuwe Massive Open Online Course (MOOC) van de Universiteit Leiden en Naturalis die 19 september van start gaat.

Promotor: E. Gittenberger, Co-promotores: L.P. van Ofwegen; B.W. Hoeksema

Promotor: M.T.M. Koper, Co-promotor: L. Juurlink

Galaxies are environments where gas coalesces, cools, and is converted into stars. However, it remains unclear the exact mechanisms through which galaxies acquire, redistribute and lose their gas.

Promotor: Prof.dr. M.T.M. Koper, Co-Promotor: F. Calle-Vallejo

Promotores: Prof.dr. J. Schaye & Prof.dr. C. Steidel (California Institute of Technology)

Promotor: Prof.dr. E.F. Smets, Co-Promotor: L.W. Chatrou

Cursus

The formation and evolution of galaxies is fundamentally driven by the formation of new stars out of cold gas.

This thesis presents pioneering work on the panchromatic emission of some of the most luminous galaxies in the early Universe: star forming galaxies and active galactic nuclei.

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

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

This dissertation studies the Asymptotics of Bayesian nonparametric inference for Gaussian linear models.

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.

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

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

The solar system was formed approximately 4.56 billion years ago. Despite the numerous theories that have been developed over the years, the formation and evolution of the solar system still remain unclear.

Lezing

Promotor: Prof.dr. S.F. Portegies Zwart

This thesis aims to enhance our understanding of galaxies by testing theoretical models of galaxy formation against observations, particularly in the cases of extreme systems which have been found to have an excess of baryonic mass in their central regions, in the form of either supermassive black holes…

Promotor: M. Franx, Co-Promotor: I.F. Labbé

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

Promotor: Prof.dr. M. Franx, Co-Promotor: Rychard Bouwens

Promotor: Prof.dr. E Gittenberger, Co-Promotores: C.H.J.M. Fransen, B.W. Hoeksema

Promotor: Prof.dr. E.F. van Dishoeck

Ben Wielstra onderzoekt balanced lethal systems, waarin de helft van het nageslacht al voor de geboorte sterft. In vakblad Current Biology legt hij op toegankelijke wijze uit hoe zoiets nadeligs kan ontstaan in de natuur.

In het kader van de Nationale Wetenschapsagenda ontvangt gedragsbioloog Hans Slabbekoorn (Instituut Biologie Leiden) een beurs van 750.000 euro van NWO om met een consortium onderzoek te doen naar vissen en geluiden rondom windmolenparken in de Noordzee.