Context and contents of the Izcatqui manuscript in the Royal Tropical Institute, Amsterdam

Poly(lactic-co-glycolic acid) (PLGA) particles have been extensively studied as biodegradable delivery system to improve the potency and safety of protein-based vaccines. In this study we analyzed how the size of PLGA particles, and hence their ability to be engulfed by dendritic cells (DC), affects…

Light reflects from a mirror, but where exactly does this reflection happen? Well, it depends, Martin van Exter and Corné Koks discovered. Their precise calculations, published in Optics Express, are important for designing optical cavities for quantum communication.

Brandon Zicha (Leiden University College The Hague) had always been critical of the teaching system at universities. But it was only when he passed the Senior Teaching Qualification at the end of last year that he was able to explain exactly what was wrong with it.

Geert Wilders wants a stricter asylum policy, but is this realistic? Maartje van der Woude, Professor of Law and Society, and Mark Klaassen, assistant professor, spoke to NRC newspaper about the legal feasibility of Wilders' plans.

To properly understand how babies absorb a language we need to study the process from a number of different perspectives, linguist Claartje Levelt argues. She accepts her appointment as Professor of Language Acquisition on 27 March with an inaugural lecture entitled ‘Language in its infancy’.

Pushing the limits and trying things out. The academic year of the Honours Academy started on 10 October and all the speakers encouraged students to jump in at the deep end.

Human trafficking is much more than kidnapping and selling people. Those who commit labour exploitation can, for example, also be sentenced for human trafficking. Criminologist Masja van Meeteren hopes to simplify the complexity of the phenomenon by charting the different forms of labour exploitati…

Replicas of artworks by world-famous artist and political activist Banksy are being exhibited at several locations in Amsterdam without the permission of the anonymous graffiti artist. Dirk Visser, Professor of Intellectual Property Law, says this is ‘clearly copyright infringement’.

The promise made in the run-up to the last Dutch elections that the ‘next cabinet formation process will be quicker and more transparent’ has already proven unrealistic. To what extent does a minority Dutch government stand a chance in the Netherlands’ fragmented political landscape? Corné Smit, external…

The recently opened ICPA (International Centre for the Prosecution of the Crime of Aggression Against Ukraine) in The Hague will be responsible for coordinating the prosecution of Russia for the crime of aggression and possibly also the prosecution of Vladimir Putin. The ICPA aims to close the gaps…

Anthonya (Thony) Visser, Leiden Professor of German Language and Literature, is spending six months as a senior fellow at the Freiburg Institute for Advanced Studies. 'Possibly the most important thing of all is that I have time.'

During the opening of the academic year, true to tradition the LUC Teaching Prize will be awarded to the best lecture at the University. Get to know the nominees. This week: Christine Espin.

Electrons in graphene behave like light particles; they have no mass and can penetrate everything: very useful if you dream about nano-electronics. But you do have to channel them. Carlo Beenakker will be researching how. He has been awarded an ERC Advanced Grant of 1.5 million euro to carry out this…

The COVID Radar app is citizen science at its best. More than 200,000 users in the Netherlands are answering questions about their health and behaviour to help predict the development of the pandemic. Niels Chavannes, Professor of General Practice at Leiden University Medical Center, explains how the…

Many Western defence strategies concentrate on maintaining the status quo. Actively promoting universal values can also be a good strategy for resilience, according to Theo Brinkel, Professor by Special Appointment in Military-Social Studies. Inaugural lecture 15 January.

Dutch coalition parties VVD and CDA want to tighten asylum policy and have launched a plan to grant two types of statuses to refugees. They also intend to partially restrict the right to family reunification. However, this plan is facing strong opposition. With the proposal, the government can expect…

‘Be yourself. Be as gay, queer, trans as you can and show the world you exist.’ These rousing words from Looi van Kessel marked the start of the third Pride Leiden for the university boat, with the theme: ‘450 years of being yourself’.

Artificial Intelligence (AI) is a technology that often puts women and minority groups at a disadvantage because it tends to be developed by straight white men. What if that changed and women were the driving force behind AI? This is the thought experiment at the heart of Maaike Harbers’ Annie Romein-Verschoor…

The death of George Floyd has led to fierce protests against police violence in the United States and beyond. What effects are we seeing in our University community? We discussed the situation with Diversity Officer Aya Ezawa.

A growing number of AI tools are being developed for the legal sector, to help professionals search lengthy texts or check court rulings. Leiden SAILS researcher Masha Medvedeva, an expert on the technical development of these systems, warns: ‘Users should know what’s under the hood.’

This month the University and several partners signed the rental contract for the brand-new Spui building. What will this location mean for the future of Campus The Hague, Leiden University and the population of The Hague? Martijn Ridderbos explains in his column.

If you would want to set up an alumni network after you graduated in Leiden and returned to your home country, how would you go about it? Seven Leiden alumni in China did not hesitate and decided to just do it! Last year they launched the Leiden Alumni Chapter in China, an initiative which was met with…

Why are we unable to address health-care inequality? This was the topic of the inaugural speech of Professor Jet Bussemaker on Friday 15 February 2019. She analysed why current policy does not suffice when it comes to protecting vulnerable groups and fighting inequality. She proposed an agenda that…

Last year around 2,000 international students started a master’s degree at Leiden University. To make this possible, there are various grants that these students can apply for. One such grant is the LExS: the Leiden University Excellence Scholarship Programme. Three LExS students tell us about their…

History can be found in utensils and in interviews with ordinary citizens. ‘With the reconstruction of everyday life, an anthropological approach works better,’ thinks historian Jan-Bart Gewald. Inaugural lecture on 6 June.

‘We’re going to see each other again on campus. We’re so pleased, but we do have to say safe.’ Rector Magnificus Hester Bijl is looking ahead to the new academic year, which begins on 6 September. No more 1.5m distancing, but we do have to take responsibility for other people’s safety.

The new Ehrenfest multi-storey car park at the heart of the Leiden Bio Science Park was opened today by the Vice-Chairman of the Executive Board of Leiden University, Martijn Ridderbos. The car park, an initiative of the University, should improve accessibility and quality of life on the campus.

Online discussion

In my research, we developed a method to distinguish knots. A knot is a mathematical depiction of the everyday knot that occurs in ropes and cords.