The use of N fertilizers has increased worldwide in the past century. While this increased input of N has increased food productivity, it has also contributed to decreases in biodiversity, soil quality and environmental health, including increases in greenhouse gas emissions.

The main research question of this thesis was: Can nitrogen cycling on dairy farms on peat soil in the Dutch Green Heart area be improved by adapting management to the nitrogen supply from soil and by using other grassland species and crops without affecting milk production?

Every organisms in the tree of life faces the same challenge: the length of its DNA exceeds the volume of the cell it needs to fit in. Several strategies have evolved to solve this problem, one of them being the expression of proteins that bind and organize the DNA.

A P300-based Brain Computer Interface character speller, also known as P300 speller, has been an important communication pathway, under extensive research, for people who lose motor ability, such as patients with Amyotrophic Lateral Sclerosis or spinal-cord injury because a P300 speller allows human-beings…

Supervisor: S.F. Portegies Zwart Co-Supervisor: A.G.A. Brown

In this thesis, we used genetically engineered mouse models to identify genes and pathways that are involved in ILC formation and in the development of resistance to FGFR-targeted therapy.

Plants, are sessile organisms, have developed strategies to adapt to changes in their environment, in part by altering their growth and development.

Promotor: Prof.dr. R. Verpoorte, Co-Promotor: Dr. Young Hae Choi

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: J.W.M. Frenken

This work describes several studies into the electroreduction of carbon dioxide (CO2RR), both regarding mechanistical aspects and catalyst stability considerations. Mechanistic insights into carbon-carbon bond formation on a silver catalyst are described in Ch 2, were we find an acetaldehyde-like surface…

Lezing

This course provides an insider perspective into the work of international criminal courts and tribunals. You will learn about the investigation and prosecution of international crimes in The Hague.

Bij Cambridge University Press (CUP) verscheen onlangs van Ingrid Leijten het boek Core Socio-Economic Rights and the European Court of Human Rights. Het boek maakt onderdeel uit van de serie Cambridge Studies in European Law and Policy en heeft als onderwerp de bescherming van sociaaleconomische rechten…

Onder de naam BrainTrain trekken onderzoekers van de Universiteit Leiden langs middelbare scholen om adolescenten weerbaarder te maken tegen desinformatie op nieuwsmedia en hun socials. In een bruisende les ontdekken leerlingen hoe makkelijk hun brein is te foppen. ‘Man, ik kreeg een hartaanval.’

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

Studievoorlichting

De specialisatie Politics, Culture and National Identities, 1789 to the Present (research) van de Universiteit Leiden brengt je in de voorhoede van de nieuwe benadering van de manier waarop in Europa politiek en identiteit worden opgevat.

We describe certain birational modifications of nodal relative curves over a regular base of arbitrary dimension.

Promotores: S.J. Edixhoven, F. Andreatta

Promotor: A.P.IJzerman, Co-Promotor: L.H. Heitman

Promotor: Prof.dr. C.W.J. Beenakker

Nicotinamide adenine dinucleotide (NAD+) is the substrate used for the introduction of the ubiquitous and highly dynamic PTM in which either one or multiple adenosine diphosphate ribose (ADPr) moieties are covalently attached to a nucleophilic side chain of an specific amino acid in the target protein…

Dit jaar werd de Staatsrechtconferentie gehouden op de Universiteit van Amsterdam op 13 december 2019 Het thema was ‘De economische constitutie’. In een van de drie parallelle panels, over sociale grondrechten, presenteerde Dr. Eduardo Arenas Catalán, docent bij het Europa Instituut, zijn paper ‘Where…

The function of TLRs in innate immunity has aroused worldwide attention soon after its discovery. Because of the broad functions of TLR2 in innate immunity, the drive for the development of TLR2-targeted vaccines or therapeutic treatments has accelerated in the last decades.

Promotores: Prof.dr. T.H.W. Bäck, Prof.dr. M.R.V. Chaudron, Co-Promotor: M.T.M. Emmerich

Promotores: J. Kok, M. Chaudron (Chalmers University)

Online cursus The Importance and Power of Music in our Society

Electrons in a crystal lattice have properties that may differ from those of a free electron in vacuum.

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

The bacterial cell wall is a nearly universal structure that offers protection and gives the cell its shape. However, environmental stressors, such as cell wall-targeting antibiotics and hyperosmotic conditions, can induce bacteria to shift to a wall-deficient state. It is unknown whether the lack of…

An Active Galactic Nucleus (AGN) is a highly luminous region at the center of a galaxy, powered by the accretion into a supermassive black hole and emitting energy from radio waves to gamma rays, often outshining the host galaxy.

The focus of the described research in this thesis is on the oxidative stress response (Nrf2 pathway). The aim of the research presented in this thesis is to obtain more information concerning microRNAs which are involved in the Nrf2 pathway, to determine and evaluate the application of microRNAs for…

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…

To improve cancer treatments, personalized medicine approaches have aimed to identify exactly which mutations are driving tumor development in a given patient and specifically target these mutations using precision therapies.

Promotores: Prof.dr. S.J. Edixhoven, Prof.dr. E. Ullmo (University Paris-Sud)

Promotor: Prof.dr. P. Stevenhagen, Prof.dr. K. Belabas (Univ. de Bordeaux)

Even though more than 4000 extra-solar planets are known today, only a small fraction of these has been captured in an image. To better understand the planet formation mechanisms in solar-like environments we started the Young Suns Exoplanet Survey (YSES).

This thesis systematically studies the physicochemical properties of non-planar, propeller-shaped, polycyclic aromatic hydrocarbons. The synthesis of several so-called propellerenes is described on a gram scale, using optimized procedures aimed at using less hazardous reagents and reducing the amount…

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

In this Ph.D. thesis we study the interaction of low energy electrons with thin materials, namely layered materials (graphene, hexagonal boron nitride, molybdenum disulfide) and organic films. At these low energies the quantum mechanical wavelength of the electron wave function is in the order of a…

Promotores: Prof.dr. H.P. Spaink & Prof.dr. P.C.W. Hogendoorn Co-promotor: Dr. M.J.M. Schaaf

Promotor: Prof.dr. M. Ubbink

Promotor: Prof.dr. B. van de Water

The elementary excitations of magnets are called spin waves, and their corresponding quasi-particles are known as magnons. The rapidly growing field of Magnonics aims at using them as information carriers in a new generation of electronic devices, (almost) free of electric currents.

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

Promotor: A. Kros

In this thesis we investigated the ability of two-photon multifocal microscopy for single-molecule microscopy in live cells and organisms.