1,189 zoekresultaten voor “chemistry weapons en ethics” in de Publieke website
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Pyrrole-based photoswitchable anion receptors
The main goal of this thesis is to achieve advanced control of binding properties in bis-pyrrolic and macrocyclic pyrrolic receptors by light.
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Graphene transmembrane nanofluidic devices: Fabrication strategies and ion transport
This dissertation was to develop effective graphene-based nanofluidic devices by developing scalable fabrication methods and elucidating proton transport mechanisms.
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Hydrogen dissociation on metal surfaces
Promotor: G. J. Kroes
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Gaining control of lipid-based nanomedicine by understanding the nano-bio interface
Dit proefschrift beschrijft een collectie aan alternatieve strategieën voor het begrijpen, ontwerpen en toepassen van lipide nanosystemen, waarin de rol van de bio-nano interacties centraal staan. In het bijzonder wordt gekeken naar de interactie van RNA-lipide nanosystemen, bekend van de toepassing…
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Coherent dynamics in solar energy transduction
Promotor: Prof.dr. H.J.M. de Groot, Co-promotor: Francesco Buda
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Highly Accurate Simulations and Benchmarking of Molecule-Surface Reactions
Heterogeneous catalyzed processes are highly significant to the chemical industry. Dissociative chemisorption (DC) of molecules on surfaces is always considered as a step with a high degree of rate control for heterogeneous catalysis.
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Towards in-cell structural study of light-harvesting complexes : an investigation with MAS-NMR
Light-Harvesting Complex II (LHCII) is responsible for light absorption and excitation energy transfer in plants and photosynthetic algae, while in high light it undergoes conformational changes by which it quenches excitations to prevent photodamage.
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Hydrogen dissociation on metal surfaces
Dissociative chemisorption is an important reaction step in many catalytic reactions.
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Influence of the electrode-electrolyte interface on electrochemical CO2 reduction reaction and hydrogen evolution reaction
The goal of this thesis is to understand how interfacial parameters, such as the addition of organic additives, bulk pH or metal cations of the electrolyte, affect the relevant electrocatalytic reactions, i.e. electrochemical CO2 reduction reaction or hydrogen evolution reaction.
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Computational electrocatalysis
This dissertation focused on computational methods based on first principles calculations using the Density Functional Theory (DFT) framework. Emphasis was laid on affordable methods that can provide a tradeoff between computational expense and accuracy.
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Development of homogeneous catalysts for the selective conversion of levulinic acid to caprolactam
Promotors: Prof.dr. E. Bouwman, Prof.dr. E. Drent
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Coiled-coil biomaterials for biological applications
This dissertation contains four works during my PhD. Different biomaterials have been designed based on coiled-coil peptides. These biomaterials have a range of applications, inclusing drug delivery, cell sorting to cell-cell fusion.
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Kunstmatige fotosynthese
Voor de omzetting van zonlicht naar brandstof
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Accurate modeling of the dynamics of dissociative chemisorption on metal surfaces
Fundamental understanding of molecular reactions on metal surfaces is important for improving heterogeneous catalysis.
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Proteins in harmony: Tuning selectivity in early drug discovery
This thesis describes the importance of being able to control the selectivity of potential drug candidates.
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Squaramide-based interpenetrated networks for load-bearing applications
This thesis explores squaramide-based supramolecular polymers and hydrogels, enhancing their mechanical strength for 3D cell culture.
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Squaramide-based supramolecular polymers : from self-assembly to in vivo application
The aim of this thesis is to develop and study a robust and adaptable scaffold for supramolecular polymer self-assembly in water.
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Transforming data into knowledge for intelligent decision-making in early drug discovery
Promotor: A.P.IJzerman Co-promotor: A. Bender
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Dynamics of a β-lactamase
BlaC is the β-lactamase of Mycobacterium tuberculosis. We show that it can recover from inhibition by clavulanic acid and that phosphate helps it do so.
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Hydrocarbons in interstellar ice analogues: UV-vis spectroscopy and VUV photochemistry
Promotor: Prof.dr. H.L.V. Linnartz
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Synthetic modification of fusogenic coiled-coil peptides
A structural investigation of coiled coil peptides used as membrane fusogens, mimicing naturally occuring coiled-coil fusion proteins. Synthetic modifications have been made to alter lipid attachment, secondary structure and to insert photoactive azobenzene moieties for active control over coiled coil…
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Data structures for quantum circuit verification and how to compare them
Quantum computers are a proposed fundamentally new type of computer. They aim to perform some computations much faster than previously possible by exploiting phenomena at the quantum scale, called superposition and entanglement.
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Electroreduction of nitrate and carbon dioxide on copper electrodes: a mechanistic study
In this thesis we have discussed several parameters that affect the electrochemical conversion of enviromentaly harmful molecules such as nitrates and carbon dioxide to more valuable and less deleterious compounds, in order to cast light onto the mechanism of the reaction to achieve an efficient and…
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Phase separation in lipid-based nanoparticles: exploring the nano-bio interface
This doctoral thesis is an effort to understand how lipid phase-separation induced by diacylglycerol analogues in lipid-based nanoparticles affects their in vivo behavior, leading to specific nanoparticle-protein communications and selective cell targeting.
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Natural and non-natural factors influencing Alzheimer´s Aβ
Promotor: Prof.dr. J.P. Abrahams
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Functionalizing monolayer graphene as a proton-selective membrane for direct methanol fuel cells
This thesis focused on the exploration of monolayer graphene as a membrane in direct methanol fuel cell (DMFC) applications, with improvements achieved through plasma exposure or damage- free chemical functionalization.
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The role and analysis of molecular systems in electrocatalysis
Molecular complexes can be used as electrocatalysts for oxygen reduction, water oxidation, and/or hydrogen peroxide production.
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From grains to planetesimals: the microphysics of dust coagulation
Promotor: Prof.dr. A.G.G.M. Tielens, Prof.dr. C. Dominik (UvA)
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Squaramide-based supramolecular materials for 3D cell culture applications
A new type of tripodal squaramide-based supramolecular hydrogels is developed and studied.
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The flux and flow of data: connecting large datasets with machine learning in a drug discovery envirionment
This thesis focuses on data found in the field of computational drug discovery. New insight can be obtained by applying machine learning in various ways and in a variety of domains. Two studies delved into the application of proteochemometrics (PCM), a machine learning technique that can be used to…
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Gamechangers
Onderzoek naar het ontwikkelen van privacy-vriendelijke zorg-games voor kinderen.
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The Hague Centre for Digital Governance
De opkomst van het digitale tijdperk beïnvloedt het openbaar bestuur op vele manieren. Digitalisering en data hebben invloed op elk aspect van openbaar bestuur en beleid. Binnen het instituut Bestuurskunde van de Universiteit Leiden, gevestigd in Den Haag - de bestuurlijke hoofdstad van Nederland -…
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Maatschappelijk verantwoord ondernemen in de wereldwijde toeleveringsketen?
Mensenrechten zijn lang het unieke domein van staten geweest. Dat is veranderd met de globalisering en de opkomst van multinationale ondernemingen. De zorg voor fundamentele arbeidsrechten binnen mondiale toeleveringsketens vormt een probleem.
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Resilience after terrorist attacks
Boekpresentatie en panel
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Hermen Overkleeft wint de 2015 Jeremy Knowles Award
Prof. Hermen Overkleeft is bekroond met de 2015 Jeremy Knowles Award van de Royal Society of Chemistry voor zijn innovatieve en inzichtelijke ontwikkeling van activity-based eiwit probes voor de beeldvorming en de identificatie van enzymen in gezondheid en ziekte. Van Overkleeft is in Leiden verbonden…
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Toon KerkhoffFaculteit Governance and Global Affairs
a.d.n.kerkhoff@fgga.leidenuniv.nl | 070 8009484
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Amber VermuntWiskunde en Natuurwetenschappen
a.d.vermunt@lic.leidenuniv.nl | 071 5274293
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Obstinate Graves in East Java: Traditionalist and Modernist Ethics, Excess, and Sufi Perspectives | Research Seminar
Lezing, Research Seminar
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De geur van het universum
Voormalig promovendus Cameron Mackie krijgt niet één, maar twee proefschriftprijzen voor zijn proefschrift over het aromatische universum. Door zijn werk kunnen we binnenkort misschien een virtueel ‘snuifje’ van de ruimte nemen. ‘Deze moleculen in de ruimte ruiken waarschijnlijk als een grote houtsk…
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Onze mensen
Dit zijn de mensen die binnen de Universiteit Leiden actief zijn op het gebied van kunstmatige intelligentie.
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Communicatie over onzekerheden
Om goed onderbouwde besluiten over complexe onderwerpen zoals het klimaat, recht en gezondheid te kunnen nemen, zijn wetenschappelijke resultaten van groot belang. Maar wetenschappelijke resultaten bevatten altijd een mate van onzekerheid. Binnen het onderzoek Communicatie over onzekerheden wordt onderzocht…
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Oncode Accelerator
Nog altijd lukt het niet om alle kankerpatiënten van de juiste behandeling te voorzien. Oncode Accelerator wil daarom de manier waarop we kankerbehandelingen ontwikkelen innoveren: binnen het programma wordt de patiënt centraal gesteld. Universiteit Leiden en LUMC gaan hier samen met andere partijen…
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Lipasen: een nieuwe doelwit in de strijd tegen tuberculose
Hoe helpen lipasen in Mycobacterium tuberculosis de bacterie te overleven, en kunnen we deze enzymen gebruiken als doelwit voor nieuwe antibiotica?
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Coiled-coils on lipid membranes: a new perspective on membrane fusion
Promotor: J.G.E.M. Fraaije, Co-Promotor: A. Kros
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Supramolecular polymer materials for biomedical applications and diagnostics
Self-assembly is an abundant process in nature and is vital to many processes in living organisms.
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Random walks and the contact process
Promotores: W. Th. F. den Hollander, M.O. Heydenreich
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The electrode-electrolyte interface in CO2 reduction and H2 evolution: a multiscale approach
Electrocatalysis allows for storing electricity or converting it into chemical bonds, producing chemical building blocks and fuels using renewable resources.
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Mechanistic studies of the water oxidation reaction with molecular iron catalysts
In this dissertation iron-based homogeneous catalysts were synthesized, characterized and investigated for water oxidation activity.
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Histone-DNA assemblies in archaea. Shaping the genome on the edge of life
All life on earth contains DNA, which is used to store biological information. Organisms compact their DNA in order for it to fit inside their cell(s).
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The formation of complex organic molecules in dense clouds-Sweet results from laboratory
Large areas of space are filled by molecular clouds that consist of gas and dust grains that are the remnants of dead stars. When these clouds start collapsing, the decreasing temperature and increasing density cause gas particles to start accreting onto dust grain surfaces.