Ice, the solid state of water, plays an important role on our planet as well as the entire universe.Despite the fact that an individual water molecule has a very simple structure, its chemical bonding in the solid phase can be surprisingly complex.

Organisms often need to adapt more efficiently and devise new strategies for surviving difficult ecological circumstances.

Binnen het brede netwerk van de Universiteit Leiden neemt het instituut deel aan onderzoek binnen de volgende profileringsgebieden:

The haplolepideous mosses (Dicranidae) comprise about 4000 species distributed over a wide range of habitats, with great gametophytic and sporophytic morphological variation. Their monophyly is well supported by the results of several molecular phylogenetic studies, which shed light on their relationships…

Promotor: Prof.dr. E.F. Smets, Co-Promotor: L.W. Chatrou

Promotor: J.M. van Ruitenbeek, Co-Promotor: S.J. van der Molen

Promotor: Prof.dr. J. den Hertog

Promotor: S.M. Verduyn Lunel, Co-promotor: S.C. Hille

Promotor: J. Zaanen, Co-Promotor: V. Juricic

De hersenontwikkeling van kinderen met een extra X chromosoom in vergelijking met kinderen met idiopathisch autisme: inzicht vanuit MRI onderzoek

The growing demand of energy indicates that global energy resources in the form of fossil fuels will not be sufficient in the future. In order to solve potential future energy problems development of a sustainable hydrogen economy is highly desirable.

In condensed matter systems electron-electron interactions, negligible in everyday metals, can dramatically alter the electronic behavior of the system. Examples of such altered behavior include high-temperature superconductivity and modulation of the electron density.

An interdisciplinary collection of the best international scholarship on Muslim youth.

The main focus of this thesis is the behaviour of two-dimensional materials, namely (anti)-ferromagnetic materials in the first two chapters, which show topological phases, and energetic square ice in the third and fourth chapter.

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

Parkinson's disease is the second most common neurodegenerative disease in the world. One of its symptoms is the loss of dopaminergic neurons in the substantia nigra pars compacta.

De nieuwbouw voor de Faculteit der Wiskunde en Natuurwetenschappen is een belangrijke mijlpaal voor de Universiteit Leiden en de faculteit in het bijzonder. In drie fasen wordt een nieuw gebouw gerealiseerd. De eerste fase van het nieuwe gebouw is in 2016 in gebruik genomen en beslaat 45.000m2. Het…

Can we develop a platform for raw materials intelligence?

In this Ph.D. thesis we study the interaction of low energy electrons with thin materials, namely layered materials (graphene, hexagonal boron nitride, molybdenum disulfide) and organic films. At these low energies the quantum mechanical wavelength of the electron wave function is in the order of a…

The research presented in this thesis explores the chemotherapeutic potential of metal-based compounds as chemotherapy agents, with an initial focus on the synthesis and DNA interaction studies of platinum and palladium compounds utilizing the [Pt(bapbpy)]2+ scaffold. The study identifies intercalation…

Visualizing the internal structure is a crucial step in acquiring knowledge about the origin, state, and composition of cultural heritage artifacts. Among the most powerful techniques for exposing the interior of cultural heritage objects is computed tomography (CT), a technique that computationally…

Guest lecture

This programme aims to make the digitized archival sources of the Kerala and Tamil Nadu Archives more accessible to Indian and international scholars and to the widest possible audience, in particular to the people of Kerala.

The sequence-dependence of biomolecular interactions involving nucleic acids and proteins is essential for numerous processes inside the cell. Insights into the underlying molecular mechanisms have been obtained using various biochemical and biophysical methods on two different levels — bulk and sin…

Throughout the history of computer science, a major challenge has been how to assert that software is free of bugs and works as intended. Software bugs can lead to serious negative impacts on any software system. Throughout the main body of the thesis, we implemented a series of studies on exploring…

De Europalezing vond voor het eerst plaats in 2013. Zij wordt jaarlijks georganiseerd door het Europa Instituut van de Leidse Rechtenfaculteit. De lezing biedt een platform aan denkers, academici en politici om hun visie op vragen van Europese integratie te delen met de academische gemeenschap en een…

Het Europa Instituut van de Universiteit Leiden is één van de oudste academische instellingen gespecialiseerd in het recht van de Europese Unie en het Europees Verdrag inzake de Rechten van de Mens.

Hoe kunnen we de uitvoering van EU beleid begrijpen en welke uitdagingen spelen daarbij een rol?

Eric De Brabandere, Anna Marhold en Nico Schrijver van het Grotius Centre for International Legal Studies zijn als arbiters en Trade en Sustainable Development experts opgenomen op een nieuw samengestelde lijst van de Europese Commissie ter implementatie van Europese vrijhandelsverdragen.

What are the behaviours of plant traits throughout various points in the growing season in a radiative transfer model framework and how well can this knowledge be integrated through data assimilation to provide priors for robust local and global vegetation products and analysis?

CERA (CErtification of RAw Materials) is a four-year project that will develop a standardized certification scheme ensuring environmental, social and economic sustainability in extraction, processing, trading and manufacturing of all mineral raw materials. It will guarantee traceability of certified…

De universiteit streeft ernaar dat alle studenten in hun opleiding kennismaken met duurzaamheidsthema’s en -vraagstukken, die zoveel mogelijk aansluiten bij de inhoud van hun opleiding.

Modern optimization algorithms offer solutions for architectural decisions like spatial, structural and energy efficiency. A young computer scientist from Leiden University co-authored a paper that won the Best Paper Award at a leading conference in Krakow during the summer.

In hoeverre is Nederland rijk geworden van de trans-Atlantische slavenhandel? Gerhard de Kok kijkt in zijn proefschrift 'Walcherse Ketens' naar Vlissingen en Middelburg, de belangrijkste slavenhandelssteden van Nederland in de tweede helft van de achttiende eeuw. Wat blijkt: op nationaal niveau was…

Noord-Korea heeft de afgelopen tijd een recordaantal raketten afgevuurd. Voor de Amerikaanse president Joe Biden reden om in gesprek te gaan met de Japanse premier Fumio Kishida en de Zuid-Koreaanse president Yoon Suk-yeol. Voor BNR duidt hoogleraar Remco Breuker de situatie.

How should jurisdictions, both on the national and on the supra-national level, handle the interaction between public and private law where it regards the regulation of financial markets?

Eduard Fosch-Villaronga, hoofdonderzoeker van het ERC StG Safe and Sound-project heeft onlangs Arnau Izaguerri van de United Nations Conference on Trade and Development (UNCTAD) ontmoet om mogelijkheden voor samenwerking te verkennen. De focus van het gesprek was het benutten van synergieën op het gebied…

What is the environmental impact of different waste collection systems across Europe? How can the collection be improved when considering collection, sorting, and treatment, as well as use options for secondary materials?

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

Het Binnenhof is het centrum van de politiek in Nederland. De eeuwenoude politieke functie van dit gebouwencomplex in Den Haag en de combinatie van bestuur, regeringsleiding en volksvertegenwoordiging op één plaats maken het Binnenhof een uniek brandpunt van de geschiedenis van Nederland.

In the Schouwburgstraat, LUGO is currently redesigning the back-garden in order to increase biodiversity and make it a more beautiful space. Throughout October 2023 until March 2024, we will be making changes to the garden with our team of volunteers.

The chemical and structural heterogeneity of toxoid vaccines makes their analysis challenging. However, detailed insights on a molecular level can be obtained by mass spectrometry.

This thesis describes the synthesis and biochemical evaluation of a variety of cyclophellitol based activity-based probes and inhibitors targeting various endo- and exo-acting retaining glycosidases. In the last two decades a variety of probes and inhibitors for (hemi)cellulose degrading enzymes have…

This thesis consists of two main parts. The first part (Chapters 2 and 3) deals with a class of Markov process called Quasi-Skipfree (QSF) processes.

The bacterial cell wall is a nearly universal structure that offers protection and gives the cell its shape. However, environmental stressors, such as cell wall-targeting antibiotics and hyperosmotic conditions, can induce bacteria to shift to a wall-deficient state. It is unknown whether the lack of…

This thesis presents the results of a study on the interfaces of insulating oxides with and without the insertion of a magnetic layer.

Binnen Quantum Leiden doen verschillende groepen onderzoek naar quantumnetwerken en quantumsensing.

Academy of Creative and Performing Arts (ACPA) verzorgt artistiek onderzoek en onderwijs in de kunsten. ACPA is een onderzoeksinstituut van de Faculteit der Geesteswetenschappen en onderdeel van een samenwerkingsverband tussen de Hogeschool der Kunsten Den Haag en de Universiteit Leiden.

Promotor: M. Danhof, Co-promotor: E.C.M. de Lange

Fungal food spoilage often starts with a contamination with spores. Experimental data strongly indicate the existence of subpopulations of spores with different levels of resistance to preservation methods.