685 zoekresultaten voor “biological check” in de Publieke website
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Analytical chemistry and biochemistry of glycosphingolipids: new developments and insights
Advanced mass spectrometry of glycosphingolipids takes the central stage in this thesis. Investigations focus on characterization of glycosphingolipid metabolism in health and disease with emphasis to the detection and accurate quantitation of known and so far unknown glycosphingolipids and closely…
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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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Lipid signaling and inflammation: metabolomics for better diagnosis and treatment strategy
Lipid signaling is an essential biological event/process in a plethora of pathophysiological conditions. The underlying idea of this thesis is that many of the roles and the complex interplay of the individual signaling lipids in inflammatory processes and related conditions in health and disease is…
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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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Giant barrel sponges in diverse habitats: a story about the metabolome
Marine sponges are important members of reef ecosystems, as they play ecological roles that are essential for the health of the reef.
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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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Synthetic Study on ADP-ribosylation
This Thesis focuses on the design and synthesis of ADP-ribosylated compounds that can be applied in biological studies.
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Design and development of conformational inhibitors and activity-based probes for retaining glycosidases
Glycosidases are essential in fundamental biological processes and are responsible for the degradation of most (oligo)saccharides, glycolipids and glycoproteins.
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Towards automated identification of metabolites using mass spectral trees
Promotor: Prof.dr. T. Hankemeier, Co-promotor: Theo Reijmers
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Thiosugars: reactivity, methodology and applications
Carbohydrates, alongside proteins and nucleic acids, constitute a crucial and versatile family of biomolecules present in all life forms. They manifest as monosaccharides, oligosaccharides, and polysaccharides, covalently bonded to proteins and fats. Carbohydrates are integral to plant and arthropod…
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Bacterial glycomimetics: synthesis and applications
This work has described synthetic strategies towards well-defined structures resembling capsular polysaccharide (CPS) fragments, CPS mimics, teichoic acid (TA) fragments as well as a third-generation ring-closing tandem metathesis (RCM) linker to better exploit the potential of automated synthesis.
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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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Shape Analysis for Phenotype Characterisation from High-throughput Imaging
We have studied shape with a particular focus on the zebrafish model system. The shape is an essential appearance of the phenotype of a biological specimen and it can be used to read out a current state or response or to study gene expression.
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Inhibitor discovery of phospholipases and N-acyltransferases
In this thesis an activity-based probe was discovered that could visualize the activity of PLAATs. With an optimized gel-based ABPP assay in hand, screening of a compound library led to the discovery of alpha-ketoamides as a hit for PLAAT3.
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Developing metabolomics for a systems biology approach to understand Parkinson's disease
Neurodegenerative diseases, including Parkinson’s disease (PD), are increasing in prevalence due to the aging population. Despite extensive study, these diseases are still not fully understood and the lack of personalised treatment options that can target the cause of the diseases, rather than the symptoms,…
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Understanding functional dynamics and conformational stability of beta-glycosidases
Due to their central physiological roles in living organisms, retaining beta-glycosidases have been the subject of tremendous research efforts to examine their structure/function relation using numerous biophysical and biochemical approaches.
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Direct and two-step activity-based profiling of proteases and glycosidases
Promotores: Prof.dr. H.S. Overkleeft, Prof.dr. G.A. van der Marel
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Systems diagnosis of chronic diseases, explored by metabolomics and ultra-weak photon emission
Promotor: J. van der Greef; Co-promotor: E. van Wijk, M. Wang
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The synthesis of mannose-derived bioconjugates and enzyme inhibitors
Promotores: H.S. Overkleeft, G.A. van der Marel, Co-Promotor: J.D.C. Codee
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mRNA and drug delivery with lipid-based nanoparticles
This thesis focuses on the application of lipid-based nanomedicine in drug delivery, including small molecular antitumor drugs and biomacromolecules including mRNA, and evaluates their biological performance.
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Discovery and characterization of new glucosylated metabolites: pathophysiological consequences
Within this thesis the central stage is taken by the discovery and investigation of transglycosylation of sterols. First, investigation focuses on the development of a method to accurately detect and quantify glucosylated metabolites in biological materials.
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Transcutaneous vagus nerve stimulation reduces spontaneous but not induced negative thought intrusions in high worriers
Transcutaneous vagus nerve stimulation (tVNS) was tested in chronic worriers. tVNS may reduce spontaneously occurring negative thought intrusions. After a worry induction, there was no longer an effect of tVNS. tVNS did not affect physiological responding to worrying.
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Stuiterende hydrogelballetjes populair in de media
De verklaring van natuurkundige Scott Waitukaitis voor de gillende en stuiterende hydrogelballetjes is door verschillende media overgenomen. Zo was Waitukaitis te zien op het RTL 4 journaal van maandag 24 juli.
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Improving vegetation representation in Multi-sensor Earth Observation Products through phenology and trait-based priors
What are the behaviours of plant traits throughout various points in the growing season in a radiative transfer model framework and how well can this knowledge be integrated through data assimilation to provide priors for robust local and global vegetation products and analysis?
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Bouwen met flexibele blokjes
Op een ogenschijnlijk gewone kubus verschijnt onder druk een patroon van hollingen en bollingen. Er is nu een methode ontwikkeld om zulke 3 dimensionale structuren te ontwerpen en maken met eenvoudige bouwstenen. Publicatie in Nature.
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Piepkleine deeltjes bouwen zelfstandig complexe structuren
Kleinere computerchips, smallere cameraatjes; ze worden steeds moeilijker om te maken. Maar wat als de bouwstenen zichzelf opbouwen? Natuurkundige Daniela Kraft bedacht een methode om deeltjes aan te sturen in samenklonteren. Publicatie in ACS Nano.
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Synthesis of well-defined ADP-Ribosylated biomolecules
Promotor: G. A. van der Marel, Co-promotor: D. V. Filippov
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Spin-label EPR Approaches to Protein Interactions
Promotor: Prof.dr. E.J.J. Groenen, Co-Promotor: M. Huber
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On shape and elasticity: bio-sheets, curved crystals, and odd droplets
Because thin systems can deform along the thickness with relative ease, the interplay between surface mechanics and geometry plays a fundamental role in sculpting their three-dimensional shape.
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Novel Protecting Group Strategies in the Synthesis of Oligosaccharides
The thesis focuses on synthesis strategies in oligosaccharide campaigns, and the influence of protecting groups.
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Iminosugars as glucosylceramide processing enzymes inhibitors: design, synthesis and evaluation
This Thesis describes the design, synthesis and evaluation as glycoprocessing enzyme inhibitors of focused libraries of iminosugars.
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Mechanistic modelling of drug target binding kinetics as determinant of the time course of drug action in vivo
Drug-target binding kinetics determine the time course of the central event in pharmacotherapy: Drug-target interaction.
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Patterns in natural systems
Promotor: A. Doelman, Co-promotores: P.J.A. van Heijster; A. Zagaris
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Physics (MSc)
De tweejarige masteropleiding Physics wordt aangeboden door het Leids Instituut voor Onderzoek in de Natuurkunde. De opleiding is theoretisch en experimenteel. Er is ruime aandacht voor onderzoekstraining. Ook bieden we veel keuzemogelijkheden en op maat gemaakte, individuele studieprogramma’s.
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Vervolgopleidingen
Na het afronden van de bacheloropleiding volgen verreweg de meeste studenten de masteropleiding.
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Biological evaluations of nanocarriers to improve the effectiveness of colorectal cancer treatment
Promotie
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Toelating en aanmelding
Is Sterrenkunde de studie die bij je past? Dan kun je je inschrijven aan de hand van onderstaand stappenplan.
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Toelating en aanmelding
Is Informatica de studie die bij je past? Dan kun je je inschrijven aan de hand van onderstaand stappenplan.
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Toelating en aanmelding
Is de specialisatie Bioinformatica van de opleiding Biologie de studierichting die bij je past? Dan kun je je inschrijven aan de hand van onderstaand stappenplan.
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Toelating en Aanmelding
Is Natuurkunde de studie die bij je past? Dan kun je je inschrijven aan de hand van onderstaand stappenplan.
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Toelating en Aanmelding
Is Biologie de studie die bij je past? Dan kun je je inschrijven aan de hand van onderstaand stappenplan.
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Toelating en aanmelding
Heb je besloten om Wiskunde te gaan studeren bij de Universiteit Leiden? Dan kun je je inschrijven aan de hand van onderstaand stappenplan.
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Toelating en aanmelding
Is Psychologie de studie die bij je past? Je kunt je vanaf 1 oktober 2024 aanmelden voor het studiejaar 2025-2026.
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Metabolomics- and methylomics-based predictors for estimating health and biological aging
Promotie
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Elastisch Leidenfrost-effect voor zachte motoren
Waterdruppels zweven in een hete pan vanwege het zogenoemde Leidenfrost-effect. Nu hebben natuurkundigen een variatie ontdekt: het Elastische Leidenfrost-effect. Het verklaart waarom hydrogel balletjes op een hete plaat rondspringen en hoge piepgeluidjes maken. Publicatie in Nature Physics op 24 jul…
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Metamateriaal vouwt zichzelf op
Hoe complexer het voorwerp, des te ingewikkelder het is om op te vouwen. Een ruimtevaartuig heeft al snel vele motortjes nodig om een instrument-arm in elkaar te vouwen en mensen hebben zelfs moeite met een wegenkaart. Natuurkundigen uit Leiden en Amsterdam hebben nu een structuur ontworpen die zichzelf…
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Toelating en Aanmelding
Is MST de studie die bij je past? Dan kun je je inschrijvenaan de hand van onderstaand stappenplan. Je schrijft je in bij de Universiteit Leiden. De Universiteit Leiden zorgt voor je inschrijving bij de TU Delft.
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Toelating en Aanmelding
Wil je graag Informatica & Economie studeren? Dan kun je je inschrijven aan de hand van onderstaand stappenplan. Inschrijving verloopt via de opleiding Informatica.
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Toelating en aanmelding
Wil jij beginnen aan een masteropleiding aan de Universiteit Leiden? Doorloop dan ons overzichtelijke stappenplan en meld je aan voor jouw master.
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Toelating en aanmelding masteropleiding
Wil je je graag aanmelden voor Fiscaal Recht aan de Universiteit Leiden? Doorloop dan de onderstaande stappen. We zien je aanmelding graag tegemoet!