Online data breaches are recurrent and damaging cyber incidents fors organizations worldwide. This study examines how organizations can effectively mitigate reputational damages in the aftermath of data breaches by hacking, through situational crisis communication strategies.

Freshwater and brackish water ecosystems are arguably the most vulnerable ecosystems on earth, due to concentrated human developments in and around them. The Pontocaspian (PC) region located at the border of Europe and Asia contains a variety of brackish water ecosystems and unique inhabitants, known…

In this article, Amandine Lerusse, investigates how the order of performance information affects local politicians’ issue prioritisation decisions.

Promotor: H.J.M. de Groot, Co-Promotor: A. Alia

Bioenergy with carbon capture and storage (BECCS) is a promising method for removing carbon dioxide (CO2) from the atmosphere and simultaneously generating energy. Yet this method is controversial, as it may require a great deal of land and water. Researchers at Leiden University have now proposed a…

This thesis combines field and laboratory studies to address some of the most pressing questions in the field of microplastic research.

Promotor: E.F. Smets Co-promotor: J. Geml

Can epigenetic changes explain associations between early life stress and health outcomes?

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

The effects of anthropogenic noise on interactions between predators and their prey are still little understood.

The global population speaks approximately 7,000 different languages and approximately half of the world’s population is bilingual. The unique orthographic characteristics of different languages can help us to gain insight into the seemingly simple process of transforming written to spoken words (i.e.,…

Does a universal psychoeducational course about stress in adolescents: I) lead to an increase in knowledge of stress?, II) affect the frequency with which stressors are experienced and the overall stress level?, III) create interest in a tier 2 level follow-up training?, and IV) appeal to students in…

Promotor: Prof.dr.ir. J.W.M. Hilgenkamp, Prof.dr. J. van den Brink

Promotor: Prof.dr. G.R. de Snoo, Co-promotor: R. Heijungs

There is concern about the threat that nanoplastics (NPs) may pose to both wildlife and humans. This thesis explores the mechanisms of toxicity of polystyrene nanoparticles (PS-NPs) in chicken embryo.

Balsaminaceae is a diverse plant family characterized by a huge floral morphological diversity.

In February 2014, the Swiss voting population accepted a constitutional initiative that aims at limiting migration through quota and, in the field of employment, national preference.

Together with a large international team of scientists, researchers Peter van Bodegom and Nadia Soudzilovskaia of the Leiden Institute of Environmental Sciences (CML) have created maps of variability in plant trait distribution across the globe. The new maps have been published in Proceedings of the…

What relationships exist between different types of PLCs and cognitive differentiated teaching?

The overall aim of the project is to investigate effective ways to strengthen vocational identity of at-risk adolescents in order to contribute to a successful transition from late secondary to post secondary lower vocational education or to work.

How and when do interest groups organise themselves as transmission belts and what are the implications for their political relevance among public officials involved decision-making processes?

The stratum corneum (SC) plays a fundamental role in the barrier function of the skin. The SC consists of corneocytes embedded in a lipid matrix.

The aim of this work was to study the applicability of antigen-coated pH-sensitive microneedle arrays for effective vaccination strategies. Therefore, a model antigen (ovalbumin) was coated onto pH-sensitive (pyridine-modified) microneedle arrays to test pH-triggered antigen release by applying the…

Why do plants produces always produced so many slightly differing metabolites within a particular chemical class?

Researchers from the Plant Ecology and Phytochemistry group at the Institute of Biology Leiden (IBL) received an STW (Stichting Technologische Wetenschappen) grant for applied studies in plant herbivore resistance with potential for a novel resistance test.

In September 2023, we started transforming a under-utilised outdoor space into a greener and more biodiverse garden in which all students and staff of the Schouwburgstraat can relax and enjoy.

Students searched for a student project about internalization and the effects of nanomaterials in freshwater organisms. Open to BSc and MSc students and any timeframe.

Studies on representative bureaucracy have often confirmed the positive performance effects of bureaucracies mirroring the demographic characteristics of their clientele. However, little is known about the underlying individual level mechanisms leading to these outcomes.

Do offshore windfarms affect the local biodiversity of the pelagic fish community and are fish deterred or attracted by sounds?

By reforming agriculture in targeted areas, we can protect the Natura 2000 areas much more effectively. This is what Jan Willem Erisman of Leiden University and Ton Brouwer of Gispoint consultancy write in a new report. They have created a special, nitrogen map of the Netherlands that shows the areas…

Promotor: Prof.dr. R. Verpoorte, , Co-Promotor: Young Hae Choi

This thesis consists of two subjects, that are both a consequence of radiation pressure.

Arts and culture, Stekjesmarkt

Arts and culture, Stekjesmarkt

PhD defence

2,240 plant extracts from 1,299 different plant species of Dutch origin. That’s the collection of the Dutch Extract Library, which has recently been transferred to the Institute of Biology Leiden. To plant biologist and contact person for this library Pingtao Ding this is a true treasury. ‘To bring…

Identifying natural plant-associated bacteria that provide targeted inhibition of pathogens through the production of antimicrobial peptides.

The placebo effect was completely new to her when Lingling Weng began the PhD project in Leiden. She is now a postdoc in China. 'It would be great to investigate the underlying mechanisms of placebo and nocebo effects with my current knowledge of EEG and fMRI.' PhD defence on 17 October.

One of the objections to the Comprehensive Economic and Trade Agreement between Canada and Europe (Ceta) is that countries would be surrendering national sovereignty to multinationals which will obstruct effective climate policy. But compared to other trade agreements, CETA is an improvement.

In this article, Yannick Veilleux-Lepage and Tommy van Steen, assistant professors at the Institute of Security and Global Affairs, discuss the degree of consensus within the field of terrorism studies regarding the impact of the COVID-19 pandemic on the activities of violent non-state actors.

Can we link multiple components from herbal extracts with their biological activities?

Plants and their pollinators form complex interaction networks. Within these networks, species differ widely in the number of species they interact with.

Mycoheterotrophy is a particular mode of life in which plants obtain carbohydrates from their associated fungal partners, instead of by using photosynthesis.