This dissertation consists of two parts, with the common theme

The main research question of this thesis was: Can nitrogen cycling on dairy farms on peat soil in the Dutch Green Heart area be improved by adapting management to the nitrogen supply from soil and by using other grassland species and crops without affecting milk production?

Promotor: C. W. J. Beenakker, Co-promotor: J. K. Asboth

Het Leiden Advocacy Project on Plastic (LAPP) is een pro bono initiatief aangaande juridische vraagstukken omtrent plastic. LAPP is opgericht om het toenemende probleem van plasticvervuiling aan te pakken en onderzoek te doen naar juridische kwesties gerelateerd hieraan. Studenten werken hierbij als…

Dit onderzoek gaat over hoe automatische gebarentaalherkenningstechnologie verder ontwikkeld kan worden om statische beelden en tekstuele beschrijvingen van gebaren te analyseren.

DNA carries various forms of information. Out of these forms of information the most well-known is classical genetic information.

Like a mixture of oil and water, lipid membranes separate into two liquid phases.

Promotor: P.M. Brakefield

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 thesis describes how complex and real-world relevant analytical solutions can be found starting from a simple Nagumo problem posed on one or two-dimensional lattices.

Dissociative chemisorption is an important reaction step in many catalytic reactions.

Promotor: G. J. Kroes

In this thesis we study bistable reaction-diffusion equations on lattice domains.

This thesis investigates opinion dynamics on random graphs through the lens of the voter model, a classical interacting particle system used to describe how consensus emerges in networks.

Understanding interactions in quantum many-body systems remains one of the most profound and difficult challenges in condensed matter physics.

The dissertation describes TEM experiments on heterogeneous catalysts.

The main topic of this PhD thesis is the Arakelov ray class group of a number field, an algebraic object that contains both the ideal class group structure and the unit group structure.

Promotor: J.G.E.M. Fraaije, Co-Promotor: A. Kros

Promotor: M.T.M. Koper, Co-Promotor: L.B.F. Juurlink

Promotores: R. Cramer, A.K. Lenstra, Co-Promotor: B.M.M. de Weger

Promotor: Prof.dr. P. Stevenhagen, Jan-Hendrik Evertse, Co-promotor: Pascal Autissier

The research described in this thesis centered on retaining exo-β-glucosidases implicated in health and disease, in particular the human inherited lysosomal storage disorder, Gaucher disease (GD).

Promotor: A. Achúcarro, Co-Promotor: J.W. van Holten

This thesis describes the role of pollution, specifically neonicotinoid insecticides, as an actor of the ongoing biodiversity decline.

My PhD research is devoted to studies of the conjectural cluster-algebraic symmetry in the theory of topological string, which is the simplest, however already non-trivial sector in the theory of string.

Polycyclic aromatic hydrocarbons (PAHs) are the most abundant class of organic compounds in space. The PAH field evolves from the constant interaction between experimentalists, theorists, modellers and observers. While laboratory research and quantum chemical calculations together set up the molecular…

Promotor: Prof.dr. M.L. van Hecke, Co-Promotor: V. Vitelli

Shape and biological function are tightly connected. Physical descriptions are used to connect the shape of a biological system with its function.

This thesis deals with properties of Jacobians of genus two curves that cover elliptic curves.

This Thesis focuses on the design and synthesis of ADP-ribosylated compounds that can be applied in biological studies.

Promotor: G.R. de Snoo

De masterspecialisatie Philosophical Perspectives on Politics and the Economy van de Universiteit Leiden was voorheen bekend onder de naam Philosophy, Politics and Economics.

This thesis mainly extends the theory of positive operators on Riesz spaces to a setting of pre-Riesz spaces.

In this thesis, we extend the concept of null models as canonical ensembles of multi-graphs with given constraints and present new metrics able to characterize real-world layered systems based on their correlation patterns.

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…

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.

The parabolic Anderson model (PAM), which is the Cauchy problem for the heat equation with random potential. The PAM is a mathematical model that describes how mass (i.e. matter or energy) flows in a medium in the presence of a field of sources and sinks.

This thesis aimed to investigate the impact of exposure dynamics, relative contributions of ENPs(particle) and ENPs(ion), and dosing regimens on the toxicity of ENPs varying in different physico-chemical properties, on the composition and functioning of soil microbial communities.

Promotor: P. Stevenhagen, Co-promotor: R.M. van Luijk

Promotor: Robert Tijdeman, Co-promotor: Cornelis Kraaikamp

In this thesis, rational points on K3 surfaces are studied. In the first part of Chapter 1 the Brauer group and the the Brauer-Manin obstruction are introduced.

Microbiome composition of the spermosphere and the rhizosphere of wild and modern bean accessions grown in an agricultural and a native soil from Colombia was characterized by metagenomics and cultivation-dependent approaches.

Plants are colonized by an astounding number of microorganisms that can provide different life-support functions, including nutrient acquisition and protection against (a)biotic stresses like drought or pathogen attack.

Het Netwerk antieke wereld (Ancient Worlds Network) bestaat uit medewerkers en masterstudenten binnen het LIAS die onderzoek doen naar de antieke wereld in het Middellandse Zeegebied en het Nabije-Oosten.

This thesis consists of three papers that are centered around the common theme of Hausdorff uo-Lebesgue topologies and convergence structures on vector lattices and on vector lattices and vector lattice algebras of order bounded operators.

The research described in this thesis has, using the zebrafish as a model system, shed new light on the intricate relationship between TB and DM2, in particular on the role of leptin, SHP-1 and glucocorticoids.

Promotor: Prof.dr. E. Bouwman, Co-Promotor: S. Bonnet

Welke rol spelen ouder-kind interacties bij het ontstaan, in stand houden en de behandeling van depressieve klachten van jongeren?

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