1,211 zoekresultaten voor “organic chemistry” in de Publieke website
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Chemische gereedschapkist in de strijd tegen kanker
Chemische stoffen maken, om biologische vragen mee op te lossen. Wouter van der Linden vat even kort de chemische biologie samen. Daaraan levert hij zijn bijdrage met stoffen die uiteindelijk behulpzaam zijn in de strijd tegen kanker: ‘Dus niet de medicijnen zelf, maar een chemische gereedschapskist…
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Rolf Bootr.g.boot@lic.leidenuniv.nl | 071 5274213
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Fate, accumulation and ecotoxicity of copper nanoparticles under environmentally relevant conditions
Fate and toxicity of copper nanoparticles was related to the water chemistry of the environment and pristine size.
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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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From midplane to planets : the chemical fingerprint of a disk
This thesis addresses the chemical processes that determine the compositions of giant planet atmospheres.
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Chemical functionalization of the graphene surface for electrical and electrochemical sensing application
Advanced sensing techniques require graphene with high quality and well-controlled surface chemistry.
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Duurzame energie uit fotosynthese: ‘Europa mag niet achterblijven’
Planten, algen en bacteriën zetten zonlicht om in chemische energie. In een workshop van het Lorentz Center inventariseren onderzoekers de mogelijkheden om dit proces van fotosynthese te benutten en imiteren, met het oog op een duurzame brandstofvoorziening. De vrijdagmiddagsessie is openbaar.
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Sander van Kasteren bij Kennislink over een chemische schakelaar in de afweer
Sander van Kasteren wilde via een simpele chemische aanpassing de werking van het immuunsysteem beter onderzoeken. Wat hij deed was het systeem platleggen. Niet de bedoeling, maar geen nood. De mislukking bracht hem op het spoor van een moleculaire schakelaar. En het leverde een hot paper op.
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Nieuw potentieel geneesmiddel onderdrukt door chemotherapie veroorzaakte neuropathische pijn
Onderzoeker Mario van der Stelt van onderzoeksinstituut Oncode heeft met zijn medewerkers een nieuw potentieel geneesmiddel (stofnaam: LEI-515) ontdekt dat door chemotherapie veroorzaakte neuropathische pijn onderdrukt.
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Atom addition reactions in interstellar ice - new pathways towards molecular complexity in space -
Promotor: Prof.dr. H.V.J. Linnartz, Co-Promotores: S. Ioppolo, H.M. Cuppen
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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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Catalysis of the electrochemical water oxidation to oxygen
Promotor: Prof.dr. M.T.M. Koper, Co-Promotor: F. Calle-Vallejo
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Temperature and pressure effects on the electrochemical CO2 reduction
In eight chapters, the thesis of Rafaël Vos covers the effect of temperature and pressure on the electrochemical CO2 reduction.
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Surface-structure dependencies in catalytic reactions
Promotor: M.T.M. Koper, Co-Promotor: L.B.F. Juurlink
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Optimization of quantum algorithms for near-term quantum computers
This thesis covers several aspects of quantum algorithms for near-term quantum computers and its applications to quantum chemistry and material science.
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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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Freek Janssen wint KNCV Farmacochemie prijs voor beste presentatie
Freek Janssen kreeg tijdens de FIGON Dutch Medicine Days 2015 op 5 oktober in Ede de KNCV Farmacochemie prijs voor beste presentatie uitgereikt. Janssen ontvangt deze prijs voor zijn presentatie
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Saeede Tafazolis.tafazoli.2@lic.leidenuniv.nl |
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The trials and tribulations of PAHs in asteroids: investigating aqueous alteration of polycyclic aromatic hydrocarbons under asteroidal conditions
Carbonaceous asteroids preserve a record of early solar system processes, where minerals and organic molecules, like polycyclic aromatic hydrocarbons (PAHs), offer clues to planetary evolution and prebiotic chemistry.
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Linking soil microbial community dynamics to N2O emission after bioenergy residue amendments
Vinasse is a major by-product generated by the sugarcane biofuel industry. It is a source of microbes, nutrients and organic matter and often it is recycled as fertilizer.
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Chemical biology studies on retaining exo-β-glucosidases
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).
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Breaking the witches' spell: towards steering the soil microbiome for volatile-mediated control of the root parasitic weed Striga
Striga hermonthica, commonly known as witchweed, infests major cereal crops in Sub-Saharan Africa causing severe yield losses and threatening the livelihood of millions of resource poor farmers.
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Towards Optical Detection of a Single Electron
Single-molecule spectroscopy has become a powerful method for using organic fluorescent molecules in numerous applications.
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Chemical Tools to Illuminate N-acylphosphatidylethanolamine Biosynthesis
This thesis describes the development and optimization of the first molecular tools to study the enzyme PLA2G4E.
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Activity-based protein profiling of glucosidases, fucosidases and glucuronidases
Promotores: H.S. Overkleeft, G.A. van der Marel, Co-promotor: B.I. Florea
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Synthesis, structure and epitope mapping of well-defined Staphylococcus aureus capsular polysaccharides
This dissertation presents the synthesis and evaluation of antibody recognition for various capsular polysaccharide (CP) fragments of Staphylococcus aureus (S. aureus).
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Design and Synthesis of Immunomodulatory Peptide Conjugates
This dissertation explores new chemical strategies for the synthesis of self-adjuvanting peptide conjugates and immunomodulatory ligands aimed at targeted activation of the immune system.
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Diversity and Functional Potential of the Sorghum Root Microbiome to Control Striga hermonthica
Sorghum (Sorghum bicolor) is a major cereal crop that millions of subsistence farmers in Sub-Saharan Africa (SSA) rely on. However, the scourging impact of the root parasitic weed Striga (Striga hermonthica, a.k.a. “witch-weed”) has remained a major constraint hampering the productivity of sorghum in…
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Chemical genetic approaches for target validation
Drug development is a time- and resource-consuming process that starts with the discovery and validation of a (protein) target that contributes to pathogenesis or disease progression.
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Biophysical feedbacks between seagrasses and hydrodynamics in relation to grazing, water quality and spatial heterogeneity
Consequences for sediment stability and seston trapping
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Stereoelectronic and conformational effects in oxocarbenium, iminium and iminosugar ammonium ions
Promotores: Prof.dr. G.A. van der Marel, M. van Heel
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Applications for activity-based probes in biomedical research on glycosidases
Lysosomal glycosidases are acid hydrolases that fragment glycoconjugates in lysosomes.
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Photocleavable activity-based acid glucosylceramidase probes
Lysosomal acid glucosylceramidase (GBA1) is a lysosomal enzyme that degrades glucolipids with its main substrate being glucosylceramide (GlcCer). Defects in the GBA1 gene lead to glycosphingolipidosis Gaucher disease (GD), in which the hydrolysis of GlcCer is impaired and therefore, it accumulates in…
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Destroy, Create, Transform and Sublimate. Laboratory Dissociation Studies on Polycyclic Aromatic Hydrocarbons and Analogues
The aromatic infrared bands (AIBs) seen throughout the interstellar medium (ISM) are generally thought to be carried by polycyclic aromatic hydrocarbons (PAHs) and their nitrogen analogues (PANHs).
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Glycosyl Cations in Glycosylation Reactions
This thesis describes the use of a combined approach of computational and experimental techniques to gain novel insights to understand the glycosylation reaction and its reactive intermediates.
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Supercritical carbon dioxide spray drying for the production of stable dried protein formulations
Promotor: W. Jiskoot, Co-promotor: H.A. Every
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Laboratory studies of Water Ice in Space
Astronomical observations of cold regions in the universe show a rich inventory of ices. Part of these ices may end up on planets like our own, but in that journey they will be exposed to considerable amounts of radiation.
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Synthesis of chemical tools to study the immune system
This thesis describes the synthesis and biological evaluation of TLR2/6, TLR4, TLR7/8 and TLR9 ligands, of which the activity can be conditionally controlled.
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Chemical Synthesis of Fragments of Streptococcal Cell Wall Polysaccharides
This thesis describes the design and synthesis of fragments of various cell wall carbohydrates of the Streptococcus species, including the branched Group B-specific antigen (GBC) of Group B Streptococcus, glycerol phosphate (GroP) modified group A carbohydrate (GAC), and the O-acetylated type 1 capsular…
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eV-TEM: Transmission Electron Microscopy with few-eV Electrons
Electron microscopy has become an extremely important techniquein a wide variety of elds.
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Exploring chemical space in covalent and competitive glycosidase inhibitor design
Glycoside hydrolases (glycosidases/GHs) are widely abundant enzymes in all kingdoms of life and are important biocatalysts that catalyze the hydrolysis of glycosidic linkages in oligo/polysaccharides, glycoproteins and glycolipids with tremendous efficiency
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Inhibitors and activity-based probes for β-D-glucuronidases, heparanases and β-L-arabinofuranosidases
Glycosidases (GHs) are enzymes responsible for the degradation of carbohydrates and play many roles in human health and pathophysiology. Often, abnormal levels of glycosidase activity are markedly linked to human pathologies.
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Synthesis and application of glycans unique to S. Mansoni
Schistosomiasis is an acute and chronic disease caused by blood dwelling parasitic trematodes of the genus Schistosoma, and it is classified as the second most socioeconomically devastating parasitic disease, second only to malaria.
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Unravelling Glycosylation Reaction Mechanisms
A key step in the synthesis of oligosaccharides and glycoconjugates is the formation of the glycosidic bond.
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Chitin in the fungal cell wall: towards valorization of spent biomass of Aspergillus niger
Aspergillus niger is an important industrial producer of organic acids and enzymes producing large amounts of spent fungal biomass.
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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.
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Targeting bacterial pathogens with next-generation glycoconjugate vaccines
This thesis investigates innovative and classical strategies in glycoconjugate vaccine development to address the growing threat of multidrug-resistant bacterial infections.
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A competitive binding assay for RNA ligand discovery
In the emerging field of small-molecule RNA targeting, there is a growing demand for new high-throughput screening methods.
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Puzzling pyrophosphates: synthetic methodologies for ADP-ribosylated biopolymers
This thesis focuses on developing new chemical synthesis strategies to produce native ADP‑ribosylated biomolecules with precise structural control.
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PLGA-based particulate vaccine delivery systems for immunotherapy of cancer
Promotores: W. Jiskoot, F. Ossendorp