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?

In this thesis we have discussed several parameters that affect the electrochemical conversion of enviromentaly harmful molecules such as nitrates and carbon dioxide to more valuable and less deleterious compounds, in order to cast light onto the mechanism of the reaction to achieve an efficient and…

On 10 June 2021, Merinda Stewart defended her thesis 'Freedom of Overflight: A Study of Coastal State Jurisdiction in International Airspace'. The doctoral research was supervised by Prof. P.M.J. Mendes de Leon en Prof. J.J. Rijpma.

Promotor: M. Ubbink, Co-promotor: G. Siegal

With the recent rise and fall of IS, academics and policy makers around the world are expressing concerns about the fate of children of former foreign fighters. Will they follow in their parents’ footsteps? In this paper, Layla van Wieringen, Daan Weggemans and Marieke Liem argue that in light of this…

How do educational philosophies, discourses and practices spread around the globe, and how are they transformed and adapted locally?

The main aim of my Ph.D. thesis is to further explore the value of using early developing zebrafish larvae (up to 5 dpf) as a model to study anxiety-like behaviour and their pharmacological modulation with drugs.

This November, Leiden Jewish Studies Network has presented the Best Thesis in Jewish Studies award to a highly talented Leiden graduate, Lotte-Sofie Groenendijk, and awarded an honourable mention to Nasreen Javanjoo.

On Friday 7 March 2025 Adam Knight successfully defended a doctoral thesis and graduated.

How can we develop new chemical biology tools and approaches to understand and interfere with glucosylceramide metabolism in relation to Gaucher disease?

On Wednesday 14 May 2025 Remzi Çakırlar successfully defended a doctoral thesis and graduated.

Whilst government’s ability to design ‘context-specific’ regional innovation policy is generally assumed to depend on the region’s decision-making power, the aim of this study is to investigate how regional government matters. In order to open up the black box of policy design, the study develops a…

The Board of Governors of Leiden University has confirmed the appointment of Professor André Gerrits (Institute for History, currently in the field of Russian Politics and History) to the field of International Studies and Global Politics, commencing October 1st 2015.

Promotor: Prof.dr. H.V.J. Linnartz, Co-Promotores: H.M. Cuppen, S. Ioppolo

On the 26th of September, Cosmas Rai Amenorvi successfully defended a doctoral thesis. Leiden University Centre for Linguistics congratulates Cosmas on this achievement!

This thesis describes biochemical investigations of glucocerebrosidase (GBA), the lysosomal β- glucosidase that is deficient in Gaucher disease (GD).

Pharmaceutical companies, governments and the general public have become increasingly aware that animal models used in drug testing lack vital aspects to serve as an accurate representation of human biology. As models of the human body should become more physiologically relevant, animal models no longer…

In this dissertation iron-based homogeneous catalysts were synthesized, characterized and investigated for water oxidation activity.

In the studies described in this study, we introduce a novel ex vivo human skin barrier repair model. To develop this, we removed the upper layer of the skin, the stratum corneum (SC) by a reproducible cyanoacrylate stripping technique.

An archaeological case-study of the Pointe des Châteaux, La Désirade and Les Îles de la Petite Terre micro-region, Guadeloupe, F.W.I.

This thesis investigated miniaturized mass spectrometry (MS)-based analytical methods to address challenges in analyzing biomass-restricted biological samples.

This article by Honorata Mazepus and Florian van Leeuwen in the journal Governance: An International Journal of Policy, Administration and Institutions looks at how evaluations of authorities were influenced by four aspects of a governmental response to a hypothetical disaster.

How do Humanitarian Response Organizations (HROs) and Virtual & Technical Communities (V&TCs) collaboratively govern disaster sensemaking processes, and what challenges shape the effectiveness of these collaborations between 2010 and 2016?

Mouse models are commonly used to assess the immunogenicity of therapeutic proteins and to investigate the immunological processes leading to antidrug antibodies. The aim of this work was to develop a transgenic (TG) Balb/c mouse model for evaluating the immunogenicity of recombinant human insulin (insulin)…

In this project we study the properties of statistical- and rule-learning mechanisms in relation to the acquisition and evolution of language. We ask to what extent these mechanisms are unique to humans - or to human language - by comparing the acquisition of vocal structure in two species: humans (infants)…

The main subject of this thesis is the design and synthesis of paramagnetic molecules for protein studies with NMR and EPR spectroscopy.

Of all the mass in our Universe, 80% is thought to consist of a hypothetical and invisible substance called dark matter (DM).

This paper describes two synthetic lipid models designed to replace human stratum corneum (SC) in studies of the impact of volatile organic chemicals on the molecular organization of the skin barrier lipids.

The endocannabinoid receptors CB1R and CB2R are involved in a plethora of processes, and consequently are involved in many pathological conditions. Their wide distribution makes the CBRs both an interesting therapeutic target and hard to study.

Spectroscopic studies on fluorescent single molecules in organic condensed matter does not only provide information about the molecule itself, but also its near environment. By suppression of phonon-induced broadening of spectral lines through cooling to low temperatures, small changes in the spectral…

Atherosclerosis is the most important underlying process that drives cardiovascular disease, and is characterized by an accumulation of cholesterol which triggers an inflammatory response in the vessel wall.

β-Lactamases are enzymes that can break down β-lactam substrates, such as antibiotics, preventing the use of these antibiotics for the treatment of various infectious diseases. However, some compounds, β-lactamase inhibitors, can block these enzymes allowing for possible treatments using a combination…

Structure-affinity relationship (SAR) and structure-kinetics relationship (SKR) studies were combined to investigate a series of biphenyl anthranilic acid agonists for the HCA2 receptor.

This dissertation defends the existence of a type of movement that has so far been considered not to be possible, namely, movement of a bare head to a specifier position over arbitrarily long distances.

The urban graveyard presents several studies in which the results of older archaeological and osteoarchaeological research are compared to more recent excavation data from several Dutch, Belgian and Danish cities and towns.

Organised in four separate sessions throughout the day, and broadcast live online to guests and families who could not join, a total of 260 students received their Bachelor’s Diploma of International Studies on 28 August 2020 at the graduation ceremony in the historic Pieterskerk in Leiden.

On Tuesday 3 September 2024 Straton Papagianneas successfully defended a doctoral thesis and graduated.

On Friday 22 November 2024 Ye Jiang successfully defended a doctoral thesis and graduated.

This study aims to examine how South Korea (hereafter, Korea) and Japan, two neighboring countries in Northeast Asia, have been responding to and mitigating the spread of COVID-19.

At the request of Dutch Parliament, Professor of European Law, Freya Baetens, wrote an expert case study on the EU-Canada Free Trade Agreement (CETA) and the EU-Indonesia Free Trade Agreement (CEPA-Indonesia). This factsheet offers parliamentarians clear, research-based insights into complex policy…

Globalization, migration, technological innovation and climate change pose challenges to citizens in European countries. These challenges test the limits of cross-national and cross-generational solidarities, touching upon the very foundations of governance and society. This research program aims at…

The Security Studies bachelor's programme has received a bronze medal in EW Best Studies 2023. Every year, EW Best Studies selects the top programmes in Dutch higher education.