Mycorrhizas are symbiotic associations between soil fungi and most plant species.

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

The mycorrhizal symbiosis is among the most widespread species interactions on Earth⁠. This thesis focuses on orchid mycorrhiza, a unique mycorrhizal type that has caught scientists’ attention for centuries⁠.

The type-IV secretion system (T4SS) is a machinery able to transfer DNA and proteins between bacteria and in certain cases also to eukaryotic cells.

Promotor: S.M. Verduyn Lunel

Planten kunnen zichzelf niet beschermen door van zich af te slaan met scherpe klauwen. Maar toch kan de plant voor hem levensgevaarlijke herbivoren afschrikken. Dat is mogelijk met geuren. Klaas Vrieling van het Instituut Biologie Leiden kwam tot de ontdekking dat evolutie een grote rol speelt om de…

Lezing

What are the flows of C&DW (e.g. bricks, concrete, gypsum and wood) in the case study countries ? How to define the specification for each material to be quantified? What indicators should be used to identify the pattern of each C&DW management system? How to interpret the MFA results in relation…

De schatkamers van de Leidse Universiteitsbibliotheek en Naturalis hebben prachtige historische collecties met gedroogde planten en botanische tekeningen. Tinde van Andel, bijzonder hoogleraar Geschiedenis van botanie en tuinen, onderzoekt deze collecties.

Het collegeaanbod op het gebied van biologie, geologie, scheikunde, natuurkunde, sterrenkunde, wiskunde, informatica en nog veel meer.

Promotie

Promotie

Lezing, Kaiser Lente Lezing

Does a high quality prairie restoration in an urban/agricultural landscape provide invertebrates necessary for a sustainable ecosystem?

Aspergillus niger is an important industrial producer of organic acids and enzymes producing large amounts of spent fungal biomass.

Boek over bestrijdingsmiddelen en waterkwaliteit

Welke planten groeien langs de sloten in de Leidse regio? Wat zegt dit over de vegetatiekwaliteit? Zou het beter kunnen? Voor het tweede jaar op rij zoeken Naturalis en het Centrum voor Milieuwetenschappen van de Universiteit Leiden jouw hulp om deze vragen te beantwoorden.

Thijs Bosker, Universitair hoofddocent Milieuwetenschappen bij Leiden University College (LUC) en het Centrum voor Milieuwetenschappen (CML), heeft samen met 19 andere partijen een subsidie van in totaal 7 miljoen euro ontvangen voor het project PAPILLIONS. Hoofdaanvrager is het NIVA, het Noorse RIVM.…

In dit interdisciplinaire onderzoeksprogramma werken onderzoekers uit vijf verschillende disciplines met elkaar samen. Zij stellen zich hieronder (in het Engels) aan u voor.

In surface science there is great effort to move from studying simple, flat model surfaces in vacuum to investigating more complex model catalysts in gas environments (in situ). This thesis gives three examples of such studies using microscopy and spectroscopy.

Promotor: Prof.dr. M. Ubbink

This thesis explores the theoretical and observational properties of distant massive galaxies that harbour active black holes in their centres and shine brightly at radio wavelengths.

Metal-based prodrugs based on ruthenium(II) polypyridyl complexes have proven to be very suitable for application in both photodynamic therapy (PDT) and photo-activated chemotherapy (PACT).

Promotor: Prof.dr. A.G.G.M. Tielens

In this thesis, the research focuses on the properties of dark matter and dark matter haloes and how they connect with the galaxies we can observe in the Universe.

Before the large scale use of renewable energy sources can be implemented in our society, the storage of electrical energy needs to be tackled. Storage the energy as hydrogen via the reduction of protons is a good option.

In this thesis, the discovery and optimization is described of chemical tools to study the N-acylethanolamine (NAE) biosynthetic pathway.

Mechanical forces are known to play an important role in bacterial colonies. In this dissertation, we study the self-organization at various stages of growing bacterial colonies, and focus on the mechanical effects of cell growth.

Dark matter is one of the biggest mysteries of the Universe. Its properties cannot be explained with the known laws of physics and elementary particles.

In the last decade, the redox interconversion between metal thiolate and disulfide compounds has been extensively investigated for copper, but not for other transition metal ions.

A large diversity of exoplanetary systems has been found, but it is still unclear what drives this diversity.

Despite the fact that gold nanoparticles (GNPs) are one of the most studied nanoparticles, there is still a necessity for new approaches allowing for effective protective coating to enable wider use of GNPs in biomedical applications.

In this thesis, we used genetically engineered mouse models and a variety of cell-culture based assays to identify genes and pathways that are involved in the development and treatment of invasive lobular carcinoma (ILC).

Promotor: Prof.dr. H.J.A. Rottgering

Promotores: Prof.dr. J. Zaanen, Prof.dr. K.E. Schalm

Promotor: A.H. Meijer, Co-promotor: B.E. Snaar-Jagalska

In the thesis the dynamics of strategies is studied from two perspectives.In the first part of the thesis strategies are considered to be opinions present in a community.

According to the amyloid cascade hypothesis, accumulation of beta-amyloid (Aβ) peptides initiates the pathological cascade in Alzheimer's disease (AD).

Particles are omnipresent in biopharmaceutical products. In protein-based therapeutics such particles are generally associated with impurities, either derived from the drug product itself (e.g. protein aggregates), or from extrinsic contaminations (e.g. cellulose fibers).

Despite the history of studies on methanol formation from CO2, the dominant elementary reaction steps that constitute the chemical mechanism for this catalyzed process are not determined.

Promotor: P. T. de Zeeuw, Co-promotor: N. Neumayer; G. van de Ven

The research presented in this thesis makes use of small molecules (as H2 , D2 and O2 ) on well-defined single crystal surfaces (flat Pt(111), flat Cu(211) and curved Pt(111)) to elucidate the role of surface structure and degrees of freedom in the reactant in specific surface reactions.

This PhD-thesis analyses the relationship between the parties’ choices in the CPB Netherlands Bureau for Economic Policy Analysis’ assessments of the election manifestos and coalition agreements over the period 1986-2017, and tries to explain this relationship.

Cholesterol influences many pathways, including serving as precursor for adrenal steroidogenesis. Imbalance of cholesterol levels has been implicated in several diseases including cardiovascular diseases and its underlying pathology, atherosclerosis.

Sterrewacht Leiden is het sterrenkundig instituut van de Faculteit der Wiskunde en Natuurwetenschappen van de Universiteit Leiden.

During embryonic growth, cells proliferate, differentiate, and collectively migrate to form different tissues at the right position and time in the body.

My PhD project studies how the temporally sequential Hox gene expression is regulated during head-tail patterning of the frog embryo.

The genetic information of all living organisms is contained in their DNA. Cells modify the degree of DNA compaction by epigenetics, which largely determines what genes are read out and which genes are transcriptionally silent.

Op 11 Mei 2016 is de prestigieuze NWO Vidi beurs toegekend aan Nadia Soudzilovskaia voor haar onderzoeksvoorstel met de titel “Do mycorrhizal fungi mediate soil carbon fate?”.