The aim of this thesis was to study phage infection in Streptomyces, focused on cell wall-deficient cells. Bacteriophages (or phages in short) attach to the cell wall of bacteria after which they replicate and lyse the host cell.

Subproject of

Can SMILE, our multi-component intervention, which combines cognitive-behavioural therapy for insomnia, mindfulness, stress, and lifestyle components, improve sleep quality? Can it also improve mood and quality of life and prevent depression and anxiety in the long term?

This book considers the porous relationship between legality and illegality in Brazil, a country that presages political and societal changes in hitherto unprecedented dimensions.

This thesis discusses the discovery potential of Intensity Frontier experiments.

Live presentation Farmacie at the Master's Online Open Days, 5 October 2023

Leiden University will be 444 years old this year and is still very much alive and kicking. But how can we humans grow old healthily? Hanno Pijl at LUMC is the grand master of lifestyle medicine. He explains how we can all benefit from a sensible - but still enjoyable - lifestyle.

On 29 April a live viewing event was held on the Spanish Stairs at the Wijnhaven building in The Hague broadcasting the ‘Spitzenkandidaten’ debate held at the Theatre at the Vrijthof in Maastricht. The debate between the lead candidates of the European political parties for the presidency elections…

Promotor: Jelle S. Kaastra Co-promotor: Jelle de Plaa

This thesis is a (biased) journey through very different topics in astrophysics: quasars and new populations of active galactic nuclei, gravitational waves from merging black holes, and protoplanetary discs around young stars.

My work is motivated by the necessity to extend Standard Model of Particle Physics in order to explain three observed phenomena that this great theory fails to accommodate

In this provocative study, Shumon T. Hussain engages with the long-standing issue of French-Anglophone research conflicts in Palaeolithic archaeology.

Zaanen

The focus of the dissertation

The radio sky harbours both galactic and extragalactic sources of arcminute- to degree-scale emission of various physical origins. To discover extragalactic diffuse emission in the Cosmic Web beyond galaxy clusters, one must image low–surface brightness structures amidst a sea of brighter compact fore-…

The high velocity tail of the total velocity distribution of stars provides essential insight into fundamental properties of the Galaxy.

As sea levels rise and climate change speeds up, knowledge about the ocean becomes increasingly important. But how is this knowledge being created and how can we use it best to prepare for the future? To answers these questions, Jackie Ashkin studies the day-to-day work of ocean scientists from up c…

A better environment starts at the Living Lab. Leiden Scientists investigate the effect of chemical compounds on biodiversity in 38 natural ditches. The official opening took place on 8 June.

PhD candidate Sebastiaan van de Lubben has written live blogs about Leiden politics. But how do you go about covering an event while it unfolds? ‘You don’t have time to think while you’re at it.’ Much proved to be unknown about this relatively new journalistic genre.

Leiden University’s Living Lab is moving to the middle of the Leiden Bio Science Park. In the lab’s new home between the University of Applied Sciences, Mentor and Naturalis Biodiversity Center, the first ditches have now been dug. This new location is more accessible to both researchers and the public.…

Coming Friday afternoons, primary school classes will visit the Living Lab! In cooperation with Technolab Leiden, several school visits will be organised. Last Friday, group 7

Biophysicist Rolf Harkes has developed a microscope to optically localize individual molecules in living cells. It improves monitoring of diseases like cancer and Parkinson’s at the cellular level. Defende PhD thesis on t13 January 2016.

Master's students of Vitality & Ageing work together with older individuals in the so-called ‘Living Lab’ to combat loneliness. You can watch four brief video’s that show their creative solutions for the course ‘the older individual’ that is coordinated by health psychologist Sandra van Dijk and former…

The LUMC, Leiden University and The Hague University of Applied Sciences want to help health professionals support behaviour change in the population. Such change would help people live healthier lives and reduce their risk of disease. The Municipality of The Hague is supporting this educational project…

Getting out and exercising rather than slobbing on the sofa, breathing in fresh air instead of cigarette smoke and grabbing healthy snacks instead of junk food. In a new interdisciplinary Medical Delta programme, researchers are going to investigate how to help people live healthier lives. What are…

The worldwide protests following the police violence in the United States show how deep-rooted and wide-spread racism is across the world. As an academic institution doing research on law & society, the Van Vollenhoven Institute is very much aware of systemic racism and speaks out in support of these…

On Thursday, November 20, 2025, the Leiden Jewish Studies Network celebrated the launch of the book Still Lives: Jewish Photography in Nazi Germany (The University of Pennsylvania Press, 2025) co-authored by Ofer Ashkenazi (Jerusalem), Sarah Wobick-Segev (Hamburg), Shira Miron (Basel) and Rebekka Grossmann…

Roderick Bouman is collection manager of the Leiden Hortus botanicus. He keeps track of which plants there are in the garden, where they come from and makes sure visitors can find the right information about them. ‘We are like a regular museum,’ says Bouman. ‘Except that our objects are alive. That…

The state, and specifically the idea of nationality, is almost all-determining in social life in the Netherlands. It determines how people identify, how we interact with each other, and what (in)equality in society looks like. However, ultimately, the idea that we can divide people into different nationalities…

Screening documentary

We are a dynamic research group at the Leiden Institute of Physics. Our aim is to explore and understand quantum materials, including strange metals, high-temperature superconductors, and quantum critical electron matter.

Our mission is to advance the understanding of mental health of individuals with a history of stress and/or trauma through rigorous interdisciplinary research, integrating insights from clinical psychology, neurobiology, and social sciences. We are committed to translating our findings into innovative…

Rossi

The main goal of the THEOR CHEM group, headed by Prof. Geert-Jan Kroes, is to characterize, and to accurately predict the outcome of chemical reactions at gas-solid and liquid-solid interfaces. Here the solid surface is typically a metal or an ice surface. These goals are important to many areas in…

After two years, it was great to be back in Brussels again. Many thanks to all alumni and students who were present during the academic discussion on the values and the future of the EU, followed by networking drinks.

The Netherlands Academy for Empirical Legal Studies is now live with website!

Over the past few weeks the world has experienced unprecedented disruption, disorder and over all change. Leiden University was no exception. Not only did all in-person teaching get cancelled and substituted by online classes, the cancellation of open days, information sessions, experience evenings…

Musicologist Dinko Fabris has been appointed professor at the Academy of Creative and Performing Arts (ACPA). He started on 1 September. 'I’m looking forward to making a connection with society.'

A new health programme will reward patients with - or at risk of developing - cardio-vascular diseases for keeping to a healthy lifestyle. A research group including psychologist Andrea Evers has been awarded 2.5 million euros by the Dutch Heart Foundation and the Ministry of Public Health, Welfare…

How can we as a society prevent suicide? According to Professor of Suicide Prevention Renske Gilissen, a better understanding and targeted action could help save lives.

On Monday 14 November, the first spadeful of earth was dug for the construction of the Living Lab, an experimental test site to study living organisms in freshwater. A total of 36 ditches will be dug out to create a natural environment where researchers can study the effects of chemical compounds from…

Playing a game, picking a cutting for your room or just having a cup of coffee: it is all possible in the new Humanities Living Room in the Matthias de Vrieshof. From Wednesday 17 May, staff and students will be able to meet informally and socialise here.

The Faculty of Humanities is looking for creative students who would like to share their talent for their Live Lunch Friday.

The Student Living Room at the KOG will soon officially open its doors. All Leiden Law School staff and students are welcome to come and see this new space during the official opening event on Tuesday 23 May at 12.00 hrs. A free lunch will be provided for all, we’ll raise a toast with a glass of bubbles,…

Archaeologist Fulco Scherjon has used computer simulations to identify where and how Neanderthals lived in West Europe. What stood out was that they probably had lots of children and lived in smaller groups than was previously thought. PhD defence on 28 May.

Staying connected has never been more important. With campus visits suspended, how are students connecting with universities? In times where physical recruitment is impossible the university turns to a more modern way of connecting with the prospective students of generation Z.

Around 1:00 p.m., a group of more than one hundred pro-Palestinian protesters gathered at the The Hague campus. Participants chanted slogans and put up banners. The vast majority of those taking part left the building after a short time. However, a small group refused to leave. Follow updates in this…

We analyse the link between media consumption and the attitudes toward people living with HIV/AIDS in Chile. We used data from a sample of 1000 people, obtained in the 2011 wave of the World Values Survey (WVS). We use a logistic binary regression model by maximum likelihood. Our results suggest that…