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

Can we distinguish the effects of pesticides from other abiotic and biotic factors that occur in the field? And how do these factors interact with pesticides?

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Promotor: A.P. IJzerman

Developing robust algorithms and theory for establishing cause-effect relationships from observational data that scale up to large data sets

In this paper, Kantorowicz argues that reverse party favoritism exists. He exploits the fact that during the SARS-CoV-2 pandemic crisis, the Polish government was keen to launch postal voting in the presidential elections scheduled for May 2020.

Promotor: A.P. IJzerman

1. To what extent do metallic NPs added to soil extractions change the activity, abundance, or community composition of microbes? 2. How do the effects of metallic NPs on soil microbes differ from the effects of the ions shedding from corresponding NPs?

A management strategy has been developed for field margins to reduce pesticide drift to non-target areas and to promote biodiversity on arable land. To this end, 3 and 6 m wide strips along the edges of winter wheat, sugar beet and potato crops have been left unsprayed with herbicides and insecticides…

We have conducted a full spectral line survey of the 3-13 micron region of two massive protostars, AFGL 2591 and AFGL 2136, for the first time at high spectral resolution.

Ichthyoarchaeological and biomolecular research to assess the trophic ecology of the Rhine-Meuse delta in the Holocene

Promotors: Prof.dr. P.J. Punt, Prof.dr. C.A.M.J.J. van den Hondel

Freshwater is an important resource, but at a great risk of species decline due to habitat loss, pollution and over-exploitation, and invasive alien species.

Nanoplastics influence the behaviour of larval zebrafish, says new research by the Institute of Biology Leiden (IBL) and the Institute of Environmental Sciences (CML). The researchers observed that a certain type of nanoparticles leads to stress reactions in the sugar balance, resulting in hyperactivity…

Nanoparticles that transport medicines to a specific part of the human body are usually broken down in the liver prematurely. Jeroen Bussmann from Leiden University has discovered a new method to prevent this from happening. Publication in ACS Nano.

We perform multidisciplinary research at molecular, cellular, and organismal levels of animal biology to increase fundamental understanding of health and disease.

Health workers have always sought ways to fight disease in vulnerable groups in the population. It is now clear that such research also benefits more prosperous countries. African worm infections and innovative thermometers have shown Leiden researchers how to fight diseases of affluence and keep health…

Since 2005 Leiden fieldschools have maintained local collaborations with archaeologists on Martinique carrying out surveys and excavations.

Supervisor: Anna Vlachodimou

What are the principles of genome folding and dynamics in bacteria?

How are the building blocks of life formed?

This research project focuses on the relation between identity marks and writing.

Rembrandt painted this Flora, the Roman goddess of spring, in 1635. She is on display above the archway leading from the Academy Building to the lush flora of the University’s Hortus Botanicus. Rembrandt, who had his own cabinet of curiosities, almost certainly knew this botanical garden, the oldest…

This project will clarify how these concepts operated in theoretical writings on performance ,this broadened conceptual framework will not only give us a clear view on how sublime effects in performance were theorized, it will also provide us a concrete apparatus to understand the cultural and political…

Research at LUC fits within the general frame of global challenges that is central to our teaching program, covering major societal issues including Peace & Justice, Diversity, Prosperity, and Sustainability.

This project intends to provide the required knowledgebase for the design of novel mild intervention protocols to prevent fungal food spoilage.

How does the photoregulation mechanism work in detail?

He presented his PhD research entitled “Kick-starting drug development; translational systems pharmacology using innovative zebrafish experiments and advanced computational modelling”. During his presentation, Rob highlighted the advancements he made in using zebrafish as model in system pharmacolog…

How do you microscopically image zebrafish larvae? The new free online course ‘Imaging the Vertebrate embryo’ teaches you all about it. Leiden PhD candidates Salomé Muñoz Sánchez and Radoslaw Gora contributed to the course.

The ‘Stans Prize 2015' (for the best thesis, report or article produced by a CML student) has been awarded to Kevin Groen. Other CML prizes were awarded to Laura Bertola, Patrik Henriksson and Rene Kleijn.

An interdisciplinary team of Leiden researchers has discovered that wasting syndrome, a severe byproduct of tuberculosis, is the same for all humans and animals studied. The discovery offers new opportunities to investigate the still insufficiently understood condition. The scientists also developed…

To develop good cancer treatments, we need to know much more about how malignant tumour cells develop. Professor Ewa Snaar-Jagalska looks at not just the effect of medication on isolated cells but also the behaviour of cancer cells in their tissue environment. Inaugural lecture on 11 December.

Pharmacologist Rob van Wijk is the Highlighted Trainee Author in the October 2019 issue of the Journal of Pharmacology and Experimental Therapeutics. In his research, Van Wijk aims for a new paradigm by combining experimental work and computational data analysis.

By comparing the archaeological evidence at Sedgeford and other sites located on both English and Continental coastal zones, what evidence is there for a shared maritime culture between these North Sea communities? Also if evidence is found, can we reveal to some extent a separate coastal identity to…

Ancient Greek was spoken in a large number of different dialects. Although we do not find direct evidence for syllabic liquids in any of our sources, comparative evidence shows that these sounds must have been present in Proto-Greek, and that they were retained until comparatively recently in the prehistory…

Update : March 2020 Directors: Dr. Lara Weiss and Dr. Christian Greco Deputy directors: Dr. Daniel Soliman and Dr. Paolo Del Vesco

Research framework CIAS

A novel in vivo model system for studies on glucocorticoid resistance

Professor Annemarie Meijer and several students explained to more than 8000 visitors the zebrafish as a model for research during the National Weekend of Science (3-4 Oct) at Science Center NEMO in Amsterdam.

Plants can’t run away from enemies. Still, it would like to keep life-threatening herbivores at a distance. This can be done with odours. Klaas Vrieling of the Institute of Biology Leiden found out with his team how plants change odour production to keep the munchers at a distance.

Tropical butterflies adapt to their environment to improve their chances of survival. The changes are triggered by hormone signals that transmit information about temperature to the butterflies' tissues. Biologist Ana Rita Mateus shows how a complex combination of environment, physiology and genetics…

Researchers from all parts of the world will be in Leiden from 2 to 4 May for a major malaria conference. The Leiden University Medical Center (LUMC) is organising a two-day workshop on how vaccines can be tested safely in humans.

The opportunistic bacterium Burkholderia cenocepacia is feared by cystic fibrosis patients and is emerging in hospital-acquired infections. An international study sheds new light on the infection mechanism of this opportunistic pathogen that may have large implications for treatment strategies.

Michiel van der Vaart with a team from Leiden University and the LUMC, led by IBL-researcher Annemarie Meijer, discovered that DRAM1 is a protein that regulates anti-bacterial autophagy, a defense mechanism against infections such as tuberculosis.

Do Ethiopian wolves change their diet and foraging strategy in the landscape under different land uses? How land use affect Afro-alpine rodent Communities? How important are Afro-alpine natural resources utilisation for local livelihoods? What is the human perception of conflict in the Afro-alpine a…

Impressions by Dr. Lilian Ruhe

Leiden University’s European and International Business Law programme has been successful for more than 20 years. Read more information about the benefits.

There must be a reason why there are 90,000 international students in the Netherlands, a number that is increasing every year. In fact, there are several very good reasons.

Promotores: G.R. de Snoo, B. Sinsin, Co-Promotor: H.H. de Iongh