Bicarbonate buffer is largely found in nature due to its ability to regulate pH variations around neutral values. As the pH changes, so does the speciation of the buffer.

This PhD-thesis presents a study on micron-sized particles, so-called colloids. By controlling the chemical and physical properties of these particles, such as the interparticle interaction and the particles’ shape, colloids can act as building blocks that self-assembly into larger structures.

Pectin is a plant cell wall polysaccharide made of mainly D-galacturonic acid (GA) subunits. The potency of the filamentous fungus Aspergillus niger to naturally secrete high amounts of pectinases to degrade pectin has been utilized for the industrial production of pectinases.

In this dissertation iron-based homogeneous catalysts were synthesized, characterized and investigated for water oxidation activity.

Electrocatalysis allows for storing electricity or converting it into chemical bonds, producing chemical building blocks and fuels using renewable resources.

Anthropogenic noise has been shown to affect marine animals in various ways, this may have fitness consequences at individual and population level. This thesis aims to increase insight into the quantification of sound-induced behavioural responses that are relevant to fitness, and into factors that…

Hydrodesulfurization (HDS) is an ubiquitous part of oil refining that ensures that fuels are cleaned of impurities and environment release of pollutants such as SOx and NOx gasses are minimized.

The electrochemical oxygen reduction reaction (ORR) is an essential half-reaction for the utilization of hydrogen as a sustainable fuel, via the conversion of hydrogen to electrons and protons facilitated by the ORR. In the most common fuel cells, the ORR is requires high loadings of non-abundant platinum…

Electron microscopy has become an extremely important techniquein a wide variety of elds.

This thesis focuses on the X-ray spectral analysis of merging galaxy clusters and the plasma code development for future high-resolution X-ray spectroscopy observations.

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

I have studied the hot, diffuse gas around and between galaxies. Specifically, I have used the EAGLE numerical simulations of galaxy formation to predict the properties of this gas, and I have used those properties to predict specific observables: soft X-ray absorption and emission lines.

In this thesis we study the landscape of gravitational models which modify GR by introducing an additional scalar degree of freedom (d.o.f.) to source Cosmic Acceleration.

Food waste is a defining inefficiency of the modern food system, with profound implications for resource use, climate change, and circular economy transitions. This dissertation examines food waste through two complementary lenses: the prevention of avoidable food waste and the valorization of unavoidable…

Producing green energy has become the main goal in our society in the search of reducing or eliminating the carbon emission from fossil fuels.

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

Radiography is an important technique to inspect objects, with applications in airports and hospitals. X-ray imaging is also essential in industry, for instance in food safety checks for the presence of foreign objects.

Sustainable energy from wind and solar is most readily available near the sea.

In multi/many-core System-on-Chips (SoCs), the performance is almost linearly scaling with the number of processing elements.

The redox-conversion reaction of metal-disulfide and metal-thiolate complexes are important, as they may shed light on electron-transfer reactions that often occur in Nature.

In this thesis, we develop a novel technique called Optical Near-field Electron Microscopy (ONEM), which aims to combine the advantages of both optical and electron microscopy: the high resolution of electron microscopy and the low sample damage of optical microscopy.

In the first part of this thesis we study the geometry of folding patterns.

What physics controls the properties of quantum matter, such as how electrons flow inside high-temperature superconductors? This question has captivated the physics community and industry for decades, in part due to the great technological potential such materials have, but also because they have resisted…

This thesis addresses the challenge of sustainable urban development by analyzing the interplay between green and grey infrastructure to optimize resource use and ecosystem services.

This thesis investigates catalytic reactions at the atomic scale using scanning tunneling microscopy (STM), with a focus on Fischer–Tropsch synthesis, a key industrial process that converts hydrogen and carbon monoxide into liquid fuels.

Met behulp van software die de hersenen nabootst, heeft ESA’s Gaia satelliet zes sterren gespot die met hoge snelheid vanuit het centrum van ons sterrenstelsel naar de rand vliegen. Dit kan essentiële informatie geven over de meest obscure gebieden in ons Melkwegstelsel.

Waar gaan de quantummechanica, de relativiteitstheorie en de zwaartekracht elkaar vinden? Wat is het missende stukje? Of is er een compleet nieuwe theorie die alle vormen van materie elegant beschrijft?

Nieuw onderzoek van de National University of Singapore en Leiden laat zien dat chimpansees en bonobo’s net zoveel contrast in hun ogen hebben als mensen, waardoor ze gemakkelijk de richting van iemands blik kunnen volgen.

Ontdek hoe je de fundamenten van natuurkunde onderzoekt en toepast in de praktijk in de bachelor Natuurkunde. Kom jij studeren aan Universiteit Leiden?

Heb je nog vragen over de opleiding Taalwetenschap? Neem dan gerust contact met ons op!

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. G.J. Kroes

Dit proefschrift gaat over theoretische oppervlakte chemie binnen het veld van de heterogene katalyse.

Hydrogen peroxide (H2O2) is an important bulk chemical that is used in various industrial processes. More than 95% of the H2O2 used in industry is made via the anthraquinone process during which a large amount of energy is going to waste.

Promotor: Prof.dr. T. Schmidt, Co-Promotor: S.J.T. van Noort

Leiden University College The Hague (LUC) biedt een 3-jarige bacheloropleiding aan waarin je je focust op Global Challenges; grote uitdagingen waar de mensheid mee te maken heeft: Vrede & Rechtvaardigheid, Diversiteit, Duurzaamheid en Welvaart. Je hebt ruimte om de opleiding zo in te richten als je…

Electrons in a crystal lattice have properties that may differ from those of a free electron in vacuum.

Microbial rhodopsins are photosensitive pigments implemented in the growth and adaptation of a large population of microorganisms.

Computers worden steeds krachtiger en krijgen steeds ingewikkelder taken. Het Leiden Institute of Advanced Computer Science (LIACS) doet baanbrekend wetenschappelijk onderzoek en past nieuwe vindingen toe in actuele maatschappelijke vraagstukken.

Hoe kunnen we een balans vinden tussen de soms tegenstrijdige belangen van individuele, publieke en private data-producenten en –verwerkers?

Promotor: Prof.dr. H.J.M de Groot, Co-Promotor: A. Alia

Leiden University College The Hague (LUC) biedt een 3-jarige bacheloropleiding aan waarin je je focust op Global Challenges; grote uitdagingen waar de mensheid mee te maken heeft: Vrede & Rechtvaardigheid, Diversiteit, Duurzaamheid en Welvaart. Je hebt ruimte om de opleiding zo in te richten als je…

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

Promotores: Prof.dr. H.J.M. de Groot, Prof.dr. J. Matysik (Universitaet Leipzig)

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

During the development of the (human) body from a single fertilized egg, organs and structures must form. The development and growth of biological forms is called morphogenesis.

Of je nu geïnteresseerd bent in internationaal recht, wereldpolitiek, diversiteit en integratie, gezondheid en het milieu, klimaatverandering en alternatieve energiestrategiëen, besluitvormingsprocessen of maatschappelijke veiligheid, LUC The Hague heeft een afstudeerrichting die bij je past!