1,368 zoekresultaten voor “chemistry wapens en ethiek” in de Publieke website
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Selective and efficient electrochemical CO2 reduction on nanostructured catalysts
Promotor: M.T.M. Koper, Co-Promotor: L.B.F. Juurlink
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Non-linear astrochemical kinetics: theory and applications
This Thesis shows discoveries in non-linear astrochemical kinetics as well as a deeper analysis of dark clouds chemistry.
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Exploring CO Adsorption on Copper: From Flat to Stepped and Curved Surfaces
This thesis highlights the significant role of surface geometry and oxidation state in determining CO adsorption behavior on copper surfaces.
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Publiekslezing en Workshop over algoritmische systemen: machtsstructuren, non-discriminatie, verantwoording
Op dinsdag 19 december 2017 organiseren Rijksmuseum Boerhaave, het Lorentz Center en eLaw een publiekslezing over de interacties tussen informatietechnologie en maatschappij.
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Mark Rutgers nieuwe decaan Faculteit der Geesteswetenschappen
Het College van Bestuur van de Universiteit Leiden heeft prof. dr. M.R. (Mark) Rutgers benoemd tot nieuwe decaan van de Faculteit der Geesteswetenschappen. Zijn benoeming gaat in op 1 maart 2017. Rutgers volgt prof. dr. Wim van den Doel op, die per 1 januari toetreedt tot de Raad van Bestuur van de…
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Zo kunnen kunstmatige antistoffen de toekomst van medicijnen veranderen
Soms is een idee op het eerste gezicht zo logisch, dat je je achteraf afvraagt waarom niemand er eerder op is gekomen. Twee onderzoekers van het LACDR hebben samen een volledig synthetisch alternatief voor antistoffen ontwikkeld. Een alternatief dat dezelfde grootte, vorm en werking heeft, maar goedkoper,…
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Astronoom Joe Callingham getuigt tegen killer-sterren in nieuwe show op Discovery
Op vrijdagavond 17 september is de Leidse astronoom Joe Callingham te zien in een nieuwe serie op Discovery. ‘Killers of The Cosmos’ gaat over krachten in het heelal die ons bestaan kunnen bedreigen. Asteroïden, kosmisch puin, elektromagnetische wapens… De show behandelt elke bedreiging als potentiële…
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‘Nooit ophouden met proberen’: Barz ziet zijn polymeren nu in klinische studie
Een nieuwe klasse polymeren is voor het eerst bij patiënten toegepast. Het gaat om de eerste nieuwe hulpstof in decennia die medicijnen beter oplosbaar maakt. Scheikundige Matthias Barz introduceerde de stof in 2014, die een uniek alternatief op de huidige opties biedt.
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Onderzoek
Onderzoekers vanuit verschillende vakgebieden werken samen om oplossingen te bedenken voor maatschappelijke problemen.
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Over het programma
In 2020 zijn de stimuleringsprogramma's van de Universiteit Leiden gestart, met als één van de programma's regeneratieve geneeskunde.
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From Atoms to Asteroids: How Chemistry Governs the Birth of Planets
Lezing, Harold Linnartz Astrochemistry Prize lecture
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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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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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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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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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Coherent dynamics in solar energy transduction
Promotor: Prof.dr. H.J.M. de Groot, Co-promotor: Francesco Buda
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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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Kunstmatige fotosynthese
Voor de omzetting van zonlicht naar brandstof
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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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Synthesis and Characterization of Boron, Nitrogen, and Carbon-Based Two-Dimensional Materials
This thesis comprises the development of reproducible synthesis procedures for two-dimensional materials (composed of boron, nitrogen and carbon) on different metallic surfaces.
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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 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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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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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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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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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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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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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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Applications of topology to Weyl semimetals and quantum computing
This thesis covers various applications of topology in condensed matter physics and quantum information.
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CO2 reduction on post-transition metals and their alloys: an industrial approach
This thesis focuses on the synthesis, characterization and performance towards CO2 electroreduction of mono and bi-metallic particles based on p-block metals
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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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Natural and non-natural factors influencing Alzheimer´s Aβ
Promotor: Prof.dr. J.P. Abrahams
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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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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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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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A fresh view on carbon radio recombination lines powered by LOFAR
The Low Frequency Array enables studies of low-frequency carbon radio recombination lines with unprecedented sensitivity, spectral and spatial resolution.
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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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Hydrogen dissociation on metal surfaces
Promotor: G. J. Kroes
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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.
- Managing the nuclear threshold: Non-nuclear allies in NATO decision-making
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Zelfportret met halsberg
In dit indringende zelfportret uit circa 1629 presenteert Rembrandt zich als een aristocratische jongeman. Rembrandt schreef zich in 1620 in als letterenstudent aan de Leidse universiteit. Het is onbekend of hij daadwerkelijk naar college ging. In zijn schilderijen en prenten verwerkte hij veel onderwerpen…
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Veiligheid en cybersecurity
Kennis die helpt om Nederland en Europa te beschermen tegen militaire en digitale bedreigingen.
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Retorica
Retorica is overal. In de Tweede Kamer, in de rechtbank, en in de collegezaal; maar ook op de markt en op sociale media. Mensen proberen elkaar steeds weer te overtuigen met argumenten, te verleiden met emoties, en te imponeren met een gunstige zelfpresentatie. De minor Retorica bestudeert de complexe…
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Willie PeijnenburgFaculteit der Wiskunde en Natuurwetenschappen
peijnenburg@cml.leidenuniv.nl | 071 5272727
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Faculteit Governance and Global Affairs
De Faculteit Governance and Global Affairs (FGGA) richt zicht op onderzoek naar maatschappelijke en governancevraagstukken zoals terrorisme, organisatie van het openbaar bestuur, klimaatverandering en economische crises. Hedendaagse onderwerpen worden zowel vanuit een bestuurskundig, politicologisch,…