Research at the Catalysis and Surface Chemistry group is comprised of the following research themes:

Prof. Dr. Joost N. Kok is panel chair in the research assessment of Tampere University of Technology (TUT), Tampere, Finland.

Identification of the products or product groups that have the greatest environmental impact from a life-cycle perspective using environmentally extended input-output analysis.

Where did species survive the cold cycles of the current Ice Age?

Vitamin A or retinol is essential in embryonic development, the visual cycle and the immune system.

Political scientists Tom van der Meer, Lisa Janssen (University of Amsterdam) and Tom Louwerse (Leiden University) analyse polls presented by the main polling agencies in the Netherlands, as well as micro-level panel data. They reach three main conclusions. First, vote intention polls in the Netherlands…

This thesis describes the role of pollution, specifically neonicotinoid insecticides, as an actor of the ongoing biodiversity decline.

For many people, five o’clock signals the end of their working day. But not for the motivated students of the Honours College Law. With some drinks and snacks, they keep going well into the evening. This time, they met for the festive conclusion of a course which brought the history of Dutch crime to…

Tessa van de Rozenberg and Daudi van Veen won the Synergy Award last month during a yearly conference of the Dutch Research Council (NWO). The PhD - candidates from Leiden University College The Hague won the prize for their idea to develop a diagnostic tool for publishers to examine gender and ethnic…

We talk to Justin, who was diagnosed with Bipolar Disorder type 1 over 14 years ago. Justin is very candid and talks about his first manic episode at the age of 28, and how he learned to live a stable life. Justin is doing well, and he owes this in particular to his own perseverance. What do you experience…

ADHD & ME aims to explore how enhancing self-esteem can break the relation between ADHD symptoms and comorbid disorders, such as anxiety and depression. In this study we assess the effectiveness of a Cognitive Behavioural Therapy (CBT) program called Competitive Memory Training (COMET) for improving…

Early diagnosis, new treatments, and personalised care: all of these are possible if we can better unlock the wealth of information hidden in health data. Unfortunately, this data is often poorly organised, difficult to access, and not interoperable. The new international Leiden Institute for FAIR and…

The MSc Life Science & Technology receives a bronze medal in EW Best Studies 2023. Every year, Elsevier selects the top programmes in higher education. A medal means that students are above-average satisfied with the quality of their programme.

The four thousand war victims buried at the Netherlands Field of Honour at Loenen include a number of Leiden students who were in the Resistance. The War Graves Foundation is looking for volunteers to take part in a special event to honour the deceased.

In recent years, the Walad Djifir from Chad found themselves in a turbulent environment due to the unrest in Nigeria, Libya and the Central African Republic. How did they adapt? Inge Butter explored their situation in her PhD thesis. PhD defence will take place on 2 July.

The Radboud Institute for Culture and History is looking for a researcher/PhD candidate in the project 'The Social Life of Early Medieval Normative Texts'. Deadline for applications: July 6.

The number of life sentences in the Netherlands is rising sharply. This is a clear response to the serious drugs violence and brutal attacks on our rule of law. However, criminal justice experts do not believe that this will deter future offenders from carrying out liquidations.

Plant architecture has distinct forms in different plant species, but also within a species the finalarchitecture of a plant is determined by its gradual development and changes therein induced by environmental conditions during the plant’s life cycle.

Research and design are two activities that are becoming increasingly important in the Dutch subjects O&O (‘research and design’) and NLT ('nature, life and technology’). The dissertation of Tessa Vossen (ICLON and Faculty of Science) indicates that teachers and students understand the importance of…

Actinobacteria are Gram-positive bacteria that have a complex multicellular life cycle and are well known for their ability to produce a wide range of bioactive natural products (NPs).

Streptomyces are multicellular, Gram-positive bacteria in the phylum of actinobacteria which produce a high amount of bioactive natural products of which the expression is tightly coordinated with the life cycle.

Promotor: E. Bouwman, Co-Promotor: S. Bonnet

The structure of bacterial cells provides crucial clues about their interaction with their host. What are the key structural features of a bacterial cell that determine pathogenicity? What roles do these structures play in the life cycle, and how do they change during the infection process?

Twenty years from now, the world population is estimated to be around 8.7 billion people, compared to the current 7.3 billion. In combination with the improvements in living standards and the corresponding growth in consumption, this will result in an enormous increase in the demand for food, consumables,…

The court has dismissed Ratko Mladić’s appeal and upheld his life sentence for genocide and war crimes. The verdict is one of Yugoslavia tribunal’s last. Mission accomplished?

The course Designing Your Life helps students navigate their career pathways. As it turns out, these pathways are full of twists and turns and - as with many journeys - you only make progress once you gather the courage to take the first step.

How did you get to where you are now? This is a key question in the Academic Life Course board game, developed by and for academics. ‘In a normal working week we hardly ever talk about the career choices we make, but with this game, we do.’

Circular economy… is it another a buzz word or a concept worth learning more about?

Amino acids are the building blocks for life on earth. They may originate in space and reach the Earth via comets and meteorites. Daniël Paardekooper examined part of this hypothesis. PhD defence on 5 July.

Our vision of stress is starting to change fundamentally. We can suffer stress without even being aware of it, while sleeping as wall as during the day. Professor of Psychology Jos Brosschot will discuss this phenomenon in his inaugural lecture on 2 December.

To look for atmospheres around planets outside our solar system is to look for extraterrestrial life. Astronomist Sebastian Zieba used data from the James Webb Space Telescope to study small rocky exoplanets but found no aliens yet. However, his findings are still very interesting for future observations.…

ALMA has observed stars like the Sun at a very early stage in their formation and found traces of methyl isocyanate - a chemical building block of life. This is the first ever detection of this prebiotic molecule towards solar-type protostars, the sort from which our Solar System evolved. The discovery…

Learning to cycle without a handbrake, saying sorry if you're late for a lecture and fathoming out the weird sounds of Dutch. Leiden's new international students get a crash course in Dutch culture during their introduction week.

NASA’s telescope SOFIA has provided a new glimpse of the chemistry in the inner region surrounding massive young stars where future planets could begin to form. Leiden PhD candidate Andrew Barr writes about it in the Astrophysical Journal. The scientists found massive quantities of water and organic…

Three students of the Arabic/Islamic BA programme seem to enjoy the Arabic class assignments.

‘Rembrandt was a stubborn, socially inept shopaholic.’ In his lifetime the Dutch master became embroiled in over 20 legal disputes. Emeritus Professor of Private Law Bob Wessels has written a book about Rembrandt’s legal and financial dealings.

At the end of a difficult year, students of ACPA’s Music Minor have put together “sonic postcards” to capture their experience of life under Covid restrictions. The result is a powerful, intimate statement about our pandemic fears and hopes.

An unprecedented space telescope, an astrolab that makes space ice and molecules that may lead to the origin of life… The Ice Age project has all the prerequisites to become a very fascinating research project – if it is not one already. Leiden astronomers Melissa McClure, Harold Linnartz and Will Rocha…

As of 1 September, Marco van Eijk has been appointed Director of Education of the bachelor's programme Life Science & Technology. He succeeds Marcellus Ubbink, who moved to the position of Scientific Director of the Leiden Institute for Chemical Research (LIC). Van Eijk has been appointed for a period…

The Automated Design and Analysis of Algorithms (ADA) research group pursues the development of Artificial Intelligence techniques that complement, rather than replace, human intelligence.

Our Leiden Law Vlogger Daniëlle shows us what life is like at the KOG while keeping to all the coronavirus measures.

A new study published in Archaeometry describes the unexpected results obtained from analyses of five human teeth discovered in a ritual cache at an enslaved African plantation site on the island of Saba in the Caribbean.

A more efficient solar panel sounds great. But what if these new panels consume more toxic materials, or their production consumes a lot of energy? Leiden environmental scientists, together with colleagues from the Fraunhofer ISE, address this multifaceted question in a new publication in the prestigious…

How does the medieval body of texts known as 'canon law' reflect social and moral ideas? With a combination of AI and an advanced dataset, can we reveal patterns in the transmission and alteration of these ideas over time? Join the SOLEMNE project as a research assistant to explore these questions and…

Leiden prof. emeritus Grzegorz Rozenberg is honoured with the first life time award in formal languages, a research area of theoretical computer science. During a small ceremony at his house, he received a statue that was specially made for the occasion.

With a Kick Off Meeting on 10 December 2021, we are proud to present the partnership of Leiden University’s Institute of Security and Global Affairs (ISGA) in the LIFE SECURDOMINO project!