As part of the Paris Agreement, countries across the world agreed to support developing countries to invest in climate mitigation and adaptation through a Green Climate Fund. However, developed countries have failed to meet funding commitments for the Green Climate Fund–the flagship program financing…

Issue 1

This thesis investigates the historical development of Japanese pitch accent.

Microbial rhodopsins are photosensitive pigments implemented in the growth and adaptation of a large population of microorganisms.

Bacteria often experience external challenges, such as changes in environmental conditions or attacks by bacteriophages.

Worldwide resurgence of pertussis necessitates the need for improvement of pertussis vaccines and vaccination strategies.

S.S. Kolipaka’s thesis questions and investigates the survival prospects of reintroduced tigers and their offspring’s in the human dominated landscape of Panna tiger reserve in India.

Nanodiscs are small, disc-shaped structures designed to mimic biological cell membranes, composed of a lipid bilayer stabilized by scaffold proteins. Membrane proteins play crucial roles in essential processes such as nutrient and waste transport, molecular recognition, and cell signalling, making them…

PAIR stands for ethical publishing and transparency. Below you can read about our commitment to COPE principles, copyright compliance and rigorous peer review ensures the integrity of every article we publish.

The cellular metabolism of immune cells constitutes an important part of their proper function and activation. Using T cells as an example, this phenomenon is highlighted by the metabolic reprogramming that occurs in these cells upon activation.

Around 1.8 million years ago, early hominins moved into Eurasia and adapted to colder climates and unfamiliar ecosystems. This project investigates whether innovations in diet such as eating new plants or applying new techniques for food processing (cooking or fermentation) contributed to this major…

Teaching Resilience and Environmental Democracy (TREnD) is an Erasmus+ Cooperation partnerships project coordinated by Dario Fazzi from Leiden University.

Promotor: H.S. Overkleeft, Co-Promotor: B.I. Florea

Currently, several successful vaccines are available. However, for pathogens with a highly variable genetic composition, and for which serum IgG antibodies are not a useful correlate of protection, effective vaccines are yet to be developed.

Our team is involved in the translation and adaptation of several questionnaires, for research purposes. Information about each questionnaire is listed below.

Want to increase your adaptability and self-management over your career and personal development? You can do that with career competences. 'Empower your PhD' is a university-wide project in which PhD candidates work on their career competences using a self-evaluation tool, personal coaching or peer…

Arco Timmermans’ handbook unites experts to examine public affairs, its challenges, and its alignment with democracy and open society.

Knowledge of mental distress and resilience factors over the time span from before to after a stressor is important to be able to leverage the most promising resilience factors and promote mental health at the right time. To shed light on this topic, we designed the RESIST Study, in which we assessed…

The ultimate goal of the PhD program is the preparation and successful defense of a PhD dissertation.

Having encountered a series of shocks that pose an existential threat to our livelihoods, our societies have become increasingly polarized.

Living systems scale from unicellular microbes to complex multispecies communities that constantly change over time. Within the theme Development & Disease, we enhance our fundamental understanding of development and homeostasis of living cells and systems. We analyze the normal situation and how stresses…

Electives offer students the opportunity to further specialise and deepen in specific aspects of leadership.

Seagrass is a marine flowering plant with special adaptations to coastal and marine environments, playing a crucial role in providing a wide range of ecosystem services.

This programme starts from the idea that cultural discourse is one of the main engines of intellectual history and the history of ideas.

Curious about how sustainability fits into our university's strategic plan, or how much energy and water we consume? Read about it here.

How has early development in R. ocellatus been modified as a result of its parasitic embryonic lifestyle?

If you're considering starting the master’s in February, please take into account that the programme may be adapted if fewer than 12 students enroll. In that case, you'll begin with an intensive crash course designed to provide essential foundational knowledge. Read below what the adapted program will…

How can a CLIL approach, with a focus on disciplinary literacies, improve the teaching of the LLA programme’s literary component in senior bilingual education (TTO)?

What is the optimal way to utilise intermediate assessment in improving study behaviour and study success?

The research of the department Public Management and Organisation addresses topics concerning the relationship between the structure of public organisations and behaviour, the role of public leadership in influencing behaviour within and around public organisations, and the importance of diversity,…

Our research in the area of safety sciences aims to increase the mechanistic understanding of cellular toxicity of drugs and, in a broader sense, chemicals.

In the ‘Cool Little Kids’ research project, we investigate a parenting program that focuses on the prevention of the development of anxiety problems in young, anxiety-prone children.

We are pleased to announce that the ENPAIR Conference 2026 will be hosted and organized by colleagues from the University of Prešov, Slovakia. The conference will take place on 17–18 September 2026 at Galéria Umelka in Bratislava, capital city of Slovakia. The conference the will be:

The Institute of Biology Leiden (IBL) is an internationally oriented institute for research and education in biology.

In the track Governance of Crisis, you will be familiarized with the main body of knowledge on strategic crisis management.

PhD defence

Archaic and Classical architectural terracottas constituted an integral part of the architecture of monumental buildings at Akragas. These objects therefore provide unique insights into the built environment of sanctuaries at this important Greek colony in Sicily. This research's multi-disciplinary…

Tom Buitelaar assesses how 'agency' is addressed in peacekeeping studies and identifies gaps.

Introduction

Cities need to become greener, more biodiverse, and climate-resilient. However, many organisms that are vital for the functioning of urban green spaces and the wellbeing of urban citizens remain largely unknown.

Leiden Law School offers an extensive range of English-taught law courses at undergraduate level. These are open to both Dutch and international students alike, giving them a truly international flavour.

The Egyptian hieroglyphic script was exceptionally versatile, as becomes clear when studying its multiple uses both within Ancient Egypt and beyond its borders.

Colonial Soldiers in Europe, 1914-1945: