837 zoekresultaten voor “bioactive molecular” in de Publieke website
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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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UV Photodesorption and Photoconversion of Interstellar Ices
This thesis is an experimental study of the UV irradiation of the interstellar ice analogues, relevant for the different stages of the star and planet formation sequence.
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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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Another Brick in the Wall: The role of the actinobacterial cell wall in antibiotic resistance, phylogeny and development
Streptomyces are multicellular, Gram-positive bacteria in the phylum of actinobacteria which produce a high amount of bioactive natural products of which the expression is tightly coordinated with the life cycle.
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Arthur Ram ontvangt NWO-beurs voor verbeteren enzymfabriek
Dit jaar start de Leidse microbioloog Arthur Ram met onderzoek om op grote schaal nuttige enzymen te produceren. Ram ontvangt een NWO-beurs voor het project dat toepassingen heeft in de industriële biotechnologie en voedingsindustrie.
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Rob Verpoorte winnaar prestigieuze farmacognosie prijs
De American Society of Pharmacognosy (ASP) heeft de Varro E. Tyler prijs toegekend aan Rob Verpoorte, voor zijn uitstekende bijdragen aan de wetenschap van de natuur als bron van geneesmiddelen.
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Molecular mystery in space
The space between the stars isn't simply a void; it also contains substances such as methanol and carbon dioxide. So far, chemical theories have been unable to explain how these substances originate under circumstances that should make it impossible. Fedor Goumans has been awarded a Veni subsidy to…
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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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Breaking & Entering: PAH photodissociation and top-down chemistry
Laboratory, observation and modeling work on the dissociation of polycyclic aromatic hydrocarbons in interstellar environments and the formation of new molecular species through the fragmentation process.
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Transformation and sublimation of interstellar ices: insights from laboratory experiments and astronomical observations
Stars and planets form within cold, dense clouds of gas and dust drifting through interstellar space. Although dust makes up only a small fraction of this material, it plays a key role in shaping the chemical evolution of these environments.
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Electronic spectroscopy of molecules of astrophysical interest
This thesis revolves around the electronic spectroscopy of molecules in the laboratory and the search for the carriers of the diffuse interstellar bands (DIBs).
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ERC beurs voor verder onderzoek moderne, minder giftige antibiotica
Nathaniel Martin heeft een Proof of Concept (PoC) beurs toegekend gekregen van de European Research Council (ERC). De beurs zal zijn onderzoeksgroep gebruiken om een potente, maar gevaarlijk, antibioticum minder giftig te maken. Hij ontvangt €150.000.
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Semi-empirical approach to the simulation of molecule-surface reaction dynamics
Catalysis is of extreme relevance in the production of everyday materials and plays a central role in many aspects of our life.
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The Miliuseae revisited: phylogenetic, taxonomic, and palynological studies in a major clade of Annonaceae
Promotor: Prof.dr. E.F. Smets, Co-Promotor: L.W. Chatrou
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Phylogeny and species delimitation within the moss genus Dicranum Hedw.
Promotor: Prof.dr. E. Smets, M. Stech
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Functions of P38 and ERK kinases in zebrafish early development
Promotor: Prof.dr. H.P. Spaink, Co-promotor: Dr. B.E. Snaar
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Functionalized two-dimensional membranes and materials for solar-to-fuel devices: a multiscale computational approach
In the current global context, there is a pressing need to address sustainable energy supplies to safeguard our Planet and its ecosystems. The choices made by human society have a significant impact on genetic evolution and climate.
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Slangengifklieren in het lab gekweekt
Voor het eerst hebben onderzoekers uit Utrecht, Leiden, Amsterdam, Liverpool en Maastricht mini-orgaantjes van slangengifklieren in het lab gekweekt. De groepjes cellen kunnen gifmoleculen produceren. Dit is een belangrijke stap om slangenbeten beter te behandelen. Publicatie in toptijdschrift Cell…
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18-jarige Molecular Science & Technology afstudeerder wil iets betekenen voor de chemie
Op 11 november organiseerde de bacheloropleiding Molecular Science and Technology een corona-proof diploma-uitreiking met een bijzondere afstudeerder: de 18-jarige Ruard van Workum. Al van jongs af aan ontwikkelde Ruard een passie voor scheikunde. Hij begon op 15-jarige leeftijd met de opleiding Molecular…
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Growth-induced self-organization in bacterial colonies
Mechanical forces are known to play an important role in bacterial colonies. In this dissertation, we study the self-organization at various stages of growing bacterial colonies, and focus on the mechanical effects of cell growth.
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Surface Temperature and the Dynamics of H2 on Cu(111)
Heterogeneous catalysis is one of the fundamental processes of modern life, being common in industrial refinery and hydrogen vehicles, all the way to the living cell. The dissociation of H2 on Cu(111) is an important benchmark system for studying heterogeneous catalysis, with a large and varied amount…
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Infrared spectroscopy of astrophysically relevant hydrocarbons
This thesis is about the study of hydrocarbons via infrared spectroscopy.
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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.
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A computational study of structural and excitonic properties of chlorosomes
The long-held desire - to link structure directly to function and to explain molecular mechanisms based on basic chemical or physical principles - is finally coming closer, satisfying not only our scientific curiosity but also offering new solutions to the many challenges in the field of health, energy…
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State-resolved studies of CO2 gas-surface reactions
The adsorption of D2 and CO2 on catalyst surfaces is studied using a molecular beam in ultra-high vacuum.
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Diagnostics for mechanical heating in star-forming galaxies
Promotor: F.P. Israel, Co-Promoter: R. Meijerink
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Bloembollen als Alzheimermedicijn
Het stofje galantamine uit bloembollen kan symptomen van Alzheimer bestrijden. Nadeem Akram onderzocht hoe narcissen dit natuurlijke medicijn optimaal kunnen produceren. Promotie op 24 juni.
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NWO-beurs drijft zoektocht naar duurzame productie antibiotica
De kans om een nieuw, spannend onderwerp te onderzoeken. Dat is hoe Lennart Schada von Borzyskowski zijn succesvolle beursaanvraag voor de NWO XS-beurs noemt. Deze 50.000 euro zal de onderzoeker van het Instituut Biologie Leiden (IBL) spenderen aan het ontwikkelen van een nieuwe methode om op duurzame…
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Ecology and genomics of Actinobacteria and their specialised metabolism
Filamentous Actinobacteria, such as Streptomyces, produce a plethora of chemically diverse bioactive metabolites that have found applications across medicine, agriculture and biotechnology.
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Copper complexes for bioinspired electrocatalysis relevant to the reduction of oxygen
This thesis advance our understanding and the application of molecular catalysts relevant to the reduction of oxygen as well as reduction of nitrite.
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Samenwerking start zoektocht voor nieuwe antibiotica met NWO beurs
Nieuwe stoffen identificeren om antibioticaresistente bacteriën te bestrijden. Onderzoekers van Leiden Universiteit en VU Amsterdam bundelen hun krachten om dit waar te maken, met een project gefinancierd door NWO’s Open Technologieprogramma (OTP). De samenwerking heeft bijna een miljoen euro toegekend…
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Een revolutie in plantbeschermende strategieën? Ding lab ontvangt 2,4 miljoen beurs
Plantenbioloog Pingtao Ding, universitair docent bij het Instituut Biologie Leiden (IBL), heeft een beurs ontvangen van 2,4 miljoen euro. De Starting Grant van de European Research Council (ERC) voor veelbelovende jonge onderzoekers geeft hem de mogelijkheid om te kijken hoe planten zich beschermen…
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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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Molecules during stellar formation and death
Promotor: Prof.dr. E. F. van Dishoeck
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Chemical reactivity of O2, CO and CO2 on Cu surfaces
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.
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Flow: A study of electron transport through networks of interconnected nanoparticles
This thesis describes a study from both a theoreticaL and an experimental point of view.
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Shining Light on Interstellar Matter
Promotor: H.V.J. Linnartz
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Kevin GroenWiskunde en Natuurwetenschappen
k.groen@cml.leidenuniv.nl | +31 71 527 6822
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Hybrid zone dynamics in amphibians
Hybrid zones occur where two species meet and produce offspring (hybrids). Typically, hybrids show a considerable reduction in fitness. In this thesis two hybrid zones are treated.
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Nathaniel Martin: waarom genezen antibiotica ons niet meer?
Resistentie tegen antibiotica heeft ertoe geleid dat de huidige middelen om bacteriën te bestrijden, dat niet meer zo goed kunnen als vroeger. Vandaag de dag overlijden er mensen aan bacteriële infecties die vijftig jaar geleden wel behandeld hadden kunnen worden.
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Cold gas in distant galaxies
The formation and evolution of galaxies is fundamentally driven by the formation of new stars out of cold gas.
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Niels van der WindtWiskunde en Natuurwetenschappen
n.van.der.windt@cml.leidenuniv.nl | 071 5272727
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Mononuclear spin-transition materials based on the bapbpy scaffold
Promotor: Prof.dr. E. Bouwman, Co-Promotor: S. Bonnet
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Lost in Chemical Space, Found in Data
Developing new medicines is one of modern science's most significant hurdles, a process marked by high costs, long timelines, and frequent failures of promising candidates.
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Beyond the Born-Oppenheimer Static Surface Model for Molecule- Surface Reactions
Several techniques are explored for going beyond the born-oppenheimer static surface model for molecule-surface reactions.
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Understanding the Surface Structure of Catalysts and 2D Materials at the Atomic Scale
The work in this thesis demonstrates how to obtain an atomic-scale picture of a diverse set of complex surface structures observed using STM, under disparate conditions.
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Deze elf Leidse bètaonderzoekers behoren tot de meest geciteerden ter wereld
Elf onderzoekers van de faculteit Wiskunde en Natuurwetenschappen staan op de 2021 Highly Cited Researchers-lijst van Clarivate Analytics. Slechts 0,1 procent van de wereldwijde onderzoekers komt in deze lijst voor, waarmee ze dus letterlijk één uit duizend zijn.
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What's in the diet? DNA-based analysis for qualitative and quantitative assessment of animal diet
Animal diet studies are critical for understanding ecological processes such as trophic interactions, energy flow, and nutrient cycling. By examining what animals consume, ecologists gain insights into species specialization, predator-prey relationships, and ecosystem management.
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The colours of the extreme universe
This thesis presents pioneering work on the panchromatic emission of some of the most luminous galaxies in the early Universe: star forming galaxies and active galactic nuclei.
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Applications of Natural Deep Eutectic Solvents to Extraction and Preservation of Biomolecules
The recently introduced nature-originated deep eutectic solvents, so-called natural deep eutectic solvents (NADES) are considered as truly green solvents, which composed of natural ingredients found abundantly in organisms.