Factors affecting galanthamine production in Narcissus

Promotor: J.M. Memelink

Promotor: Prof.dr. P. Hooykaas, Co-promotor: Dr. R. Offringa

Possible improvements for the assessment of abiotic depletion in LCA.

Promotor: Prof.dr. G.R. de Snoo, Co-promotores: Dr. ing. M.G. Vijver, J.P.M. Vink

Promotor: P.J.J. Hooykaas, Co-Promotor: E.J. van der Zaal

Description of Biotic ligand models: making an inventory of available models & assessment of the variability of the predicted HC5 using the BLMs in different Dutch water types (2005 - 2007)

Promotor: Prof.dr. W.J.G.M. Peijnenburg, Co-promotor: Dr. ing. M.G. Vijver

How can we facilitate the early recognition of stress and anxiety in the classroom and collaborate with schools in providing low-threshold interventions?

What is the role of stress and stress-related hormones in emotion regulation?

With this thesis the PhD-candidate aims to enrich the body of evidence concerning the relation between stress and health, and the mediating role of (un)conscious perseverative cognitions, which is captured in the extended perseverative cognition hypothesis.

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…

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

How can we manipulate the biotic and abiotic environment to increase thrips resistance in tomato and chrysanthemum? More specifically we ask: How can plant secondary metabolites that are not soluble in water be delivered to plants in seed coating or root dipping treatment? Can bacteria be used to…

Professor at the School of pharmaceutical sciences, University of Geneva - Switzerland

Promotor: B. van de Water

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?

Promotor: Prof.dr. J. Kuiper

Promotor: P.G.L. Klinkhamer, Co-Promotores: K. Vrieling, P.P.J. Mulder

The major aim is to determine the role of stress and stress-related psychophysiological mechanisms (e.g., cognitions, behaviors, and physiological stress responses) of patients with chronic inflammatory conditions and to develop and evaluate stress management interventions to alter the psychophysiological…

To what extent is sound a stressor to fish? And are behavioural and physiological phenotypes equally sensitive to disturbance by noise pollution?

Stress, burnout, depression – these conditions pervade all levels of our society. Children and students suffer from constant pressure to achieve; at the international level, tensions lead to short-sighted actions; and, at the personal level, stress affects our health and social environment. How do our…

How does the endocannabinoid system in the zebrafish function at the molecular and phenotypic levels and how is it linked to the stress axis?

Our vision of stress is starting to change fundamentally. We can suffer stress without even being aware of it, while sleeping as wall as during the day. Professor of Psychology Jos Brosschot will discuss this phenomenon in his inaugural lecture on 2 December.

What are the behavioral, cognitive, and motivational consequences of decision reversibility?

Which microorganisms live near and inside plant roots? How do they contribute to plant health? Can microorganisms be employed in plant protection?

Clinical psychologist Bernet Elzinga has been appointed as Professor of a personal chair at the Faculty of Social and Behavioural Sciences. This professorship will contribute both nationally and internationally to the broader promotion of Leiden University in the field of stress and psychopathology.

The research question is that unconscious perseverative cognition (UPC) is responsible for a considerable part of cardiovascular (CV) activity that occurs even in the absence of threats and other stressors that one may encounter in one’s daily life.

The overall objectives of my thesis are to investigate the dynamics of the sorghum root microbiome and to explore the beneficial effects of the root microbiome on sorghum growth and stress tolerance.

What is the role of neuronal emotional reactivity in the intergenerational transmission of abuse?

Ilze Bot and Johan Kuiper have published in The Lancet: Study unveils how stress may increase risk of heart disease and stroke. Aso: The National Dutch newspaper 'NRC' has mentioned them in a column

Chronic stress weakens the immune system, psychologist Jos Brosschot warns in an interview with Leidsch Dagblad newspaper. Social isolation can cause feelings of insecurity and stress. He therefore advises keeping in touch with others.

Promotores: W.J.G.M. Peijnenburg, G.R. de Snoo, Co-promotor: M.G. Vijver

The challenge: Building a tool to detect chemical compounds that individually cause non-lethal stress to bacteria, but that are lethal in combination. A team of thirteen Leiden students are taking up this challenge in the annual ‘international Genetically Engineered Machine’ (iGEM) competition for applications…

How can we quantify the density of species within a community through environmental DNA concentrations?

The mission of the Plant Sciences cluster is to contribute to the sustainable production of high-quality crops, flowers and high-value bio-based products, and to contribute to the maintenance and restoration of biodiversity in natural ecosystems. This is realised by generating fundamental knowledge…

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?

Are you a school or university student, and do you feel very anxious before and during exams? Take advantage of these tips by Leiden student psychologists, from how to stop ruminating to how to conquer a black-out.

PhD at the Max Planck Institute of Molecular Plant Physiology, Golm – Germany

Dr. Kirsten Leiss and Prof. Peter Klinkhamer received 900.000 euro’s from “Stichting Toegepaste Wetenschappen (STW)” and the company “Rijk Zwaan” to develop plants that are resistant to thrips, a major agricultural pest all over the world.

High throughput microscopy

What are trait-trait relationships in wetlands? To what extent the so-called leaf economics traits deviate from terrestrial ecosystems? How traits specific to wetland plant relate to plant strategies? What’s the relationship between wetland plant traits to the ecosystem functioning (e.g. productivity,…

Plant Sciences' contribution to the Development & Disease research theme is to unravel the processes that allow plants to adapt to changing abiotic and biotic environmental conditions or stresses, with the aim to contribute to the sustainable production of food, flowers and bio-based products using…