1,485 zoekresultaten voor “mathematics biology” in de Publieke website
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Synthesis of D-alanylated wall teichoic acids from staphylococcus aureus
This Thesis describes the synthesis of D-alanylated ribitol-based wall teichoic acids from S. aureus to probe their interaction with immune-binding partners.
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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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Inverse design of curvature-sensing antiviral peptides
Viral diseases constitute one of the major challenges in modern medicine. Membrane-targeting have broad-spectrum potential and could distinguish viral membranes from the host cell plasma membrane by the difference in membrane curvature.
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Substrates and inhibitors to study and modulate ER-I α-glucosidase activity
This thesis describes research aimed at discovering inhibitors selective for either of the two endoplasmic reticulum α-glucosidases, ER-I and ER-II, with the overarching goal of discovering new antiviral agents to treat viruses that rely on host N-glycosylation for proliferation.
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Project SkinPrint van Leidse masterstudenten wint de Digital Award van de Philips Innovation Award
Vier Leidse studenten die de masterspecialisatie Science Based Business volgen, bedachten een concept om met een 3D Bioprinter menselijke huid te produceren. Slachtoffers van brandwonden zouden dankzij Skinprint minder operaties nodig hebben en er minder littekens aan over houden.
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Activity-based protein profiling in drug discovery
In the last decades, activity-based protein profiling (ABPP) has emerged as a powerful chemical tool that may aid the ever-challenging drug discovery process.
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Biophysical characterization of membrane protein-small molecule interactions
Promotor: Prof.dr. M. Ubbink
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Activity-Based Proteasome Profiling
Promotor: Prof.dr. H.S. Overkleeft
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Microglial lipid metabolism: a delicate balance
Microglia support the central and peripheral nervous system by forming the first line of defense against hazardous events. Microglia are increasingly acknowledged as critical players in neurodegenerative diseases, highlighting them as potential therapeutic targets.
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Dynamic organization of bacterial chromatin by DNA bridging proteins
Bacteria often experience external challenges, such as changes in environmental conditions or attacks by bacteriophages.
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Bioorthogonal tools to study fatty acid uptake in immune cells
The cellular metabolism of immune cells constitutes an important part of their proper function and activation. Using T cells as an example, this phenomenon is highlighted by the metabolic reprogramming that occurs in these cells upon activation.
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Science meets Business; 70 stageplaatsen bij meer dan 20 bedrijven op Bio Science Park Leiden
Je bent masterstudent in Leiden en je loopt stage op het Bio Science Park (BSP). Veel idealer kun je het niet hebben als bètastudent met de masterspecialisatie ‘Science Based Business’ (SBB). Nog voordat ze zijn afgestudeerd, hebben zeventig masterstudenten in een bedrijf meegedraaid.
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Ionica Smeets presenteert Nationale Wetenschapsquiz
Hoe krijgen spionnen in azijn gedrenkte eierschalen weer hard? Op kerstavond onthult hoogleraar wetenschapscommunicatie Ionica Smeets het antwoord op deze vraag en andere breinbrekers. Ze presenteert dit jaar de Nationale Wetenschapsquiz van de VPRO.
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Afrikaanse leeuw twee ondersoorten
De traditionele scheiding van leeuwen in een Afrikaanse en een Aziatische ondersoort is onterecht, zegt bioloog Laura Bertola. In Afrika leven twee ondersoorten. Promotie 18 maart.
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Twee Leidse wetenschappers in Opzij Top 100
Wetenschappers Bibi van den Berg en Ionica Smeets staan in de Opzij Top 100, de jaarlijkse lijst met invloedrijkste vrouwen van Nederland.
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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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Chemical synthesis of fragments of galactosaminogalactan and pel polysaccharides
The work described in this Thesis is focused on the assembly of oligosaccharide fragments derived from a fungal polysaccharide, galactosaminogalactan (GAG) and fragments of the exopolysaccharide Pel, generated by Pseudomonas aeruginosa.
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The development of molecular tools for investigating NAD+ metabolism and signalling
Nicotinamide adenine dinucleotide (NAD+) is the substrate used for the introduction of the ubiquitous and highly dynamic PTM in which either one or multiple adenosine diphosphate ribose (ADPr) moieties are covalently attached to a nucleophilic side chain of an specific amino acid in the target protein…
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NMR structural studies of protein-small molecule interactions
Promotor: Prof.dr. M. Ubbink, Co-promotor: G. Siegal
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DNAmarkerpoint
DNAmarkerpoint heeft als doel ecologie, evolutie en biodiversiteit beter te begrijpen door het bestuderen van modern en ancient DNA.
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Mechanism-based inhibitors and probes for neuraminidases
Neuraminidases are enzymes that cleave glycosidic linkages of sialic acid. These enzymes are involved in influenza infections as well as in many cellular processes in mammals and micro-organisms.
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Synthesis of cyclic peptides as bioconjugation platforms
Cyclic peptides are investigated as a platform to induce different orientations between various ligands.
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Projecten
Projecten van de afdeling Environmental Biology
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Essentiality of conserved amino acid residues in β-lactamase
Evolution acts via mutations in amino acid sequences. Substitution of essential amino acids leads to a nonfunctional protein. l.
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Voor de liefhebbers van wiskunde: de Leidse Wiskundewandeling
De Leidse Wiskundewandeling voert door de fraaie Leidse binnenstad waarbij voor uiteenlopende locaties een uitdagend wiskundig vraagstuk is bedacht. De wandeling is gericht op scholieren maar iedereen die wiskunde leuk vindt kan de korte of de lange versie van de route nemen.
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Crowdfundingsactie 'Een tuintje op Mars' van start
Dertien Leidse studenten zijn een crowdfundingsactie gestart om geld in te zamelen voor onderzoek naar mogelijkheden om planten op Mars te verbouwen. Zij dragen hiermee bij aan de kennis van het heelal. Het project maakt deel uit van de iGEM-wedstrijd.
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Brede universiteit heeft gunstige uitgangspositie voor innovatie
Brede universiteiten met veel aandacht voor fundamenteel onderzoek hebben de beste kans om bij te dragen aan economische innovaties, bijvoorbeeld in de life en data sciences. Dat zegt hoogleraar Simcha Jong in zijn oratie op 14 november.
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Internationale consortia: de toekomst voor de wetenschap?
Internationale wetenschappelijke consortia zijn steeds belangrijker binnen de wetenschap. Ze staan tegenwoordig vaak centraal bij de aanpak van mondiale vraagstukken op het gebied van gezondheid, milieu en schone energie. Ze kennen echter ook unieke uitdagingen. Om die in kaart te brengen, ontving hoogleraar…
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Jitske van WelsenFaculteit der Wiskunde en Natuurwetenschappen
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C-SCAPE - Sandy strategies for sustainable coastal climate change adaptation
What is the optimal design of sandy solutions for sustainable climate change adaption, from an ecological, biophysical and societal point of view?
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Mutation-Driven Modulation of GPCR Pharmacology: Insights from Adenosine and Serotonin Receptors
This thesis seeks to investigate how cancer-associated mutations affect the pharmacological properties of selected GPCRs—primarily A2AAR and 5-HT2CR—through a combination of ligand binding assays, signaling readouts, kinetic profiling, and cellular functional assays.
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Bachelorstudent universiteit
Om leraar te worden in het voortgezet onderwijs heb je een onderwijsbevoegdheid nodig, die je kunt behalen aan de Universiteit Leiden.
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Design and Synthesis of Inhibitors and Probes for Sulfoquinovosidases and Xylanases
This thesis focuses on the design and synthesis of activity-based probes and inhibitors targeting enzymes involved in the degradation of specific plant glycans.
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Bioorthogonal deprotection strategy to study T-cell activation and cross- presentation
Cytotoxic T-cells (CTLs) are involved in the clearance of viruses and killing of tumor cells.
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Activity-based protein profiling of diacylglycerol lipases
Promotor: H.S. Overkleeft, Co-promotor: M. van der Stelt
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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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Satellite remote sensing of plant functional diversity
Biodiversity enables ecosystems to thrive through the synergy of functional differences among organisms. While human well-being strongly depends on biodiversity-driven ecosystem services, human actions are also at the root of current unprecedented biodiversity declines.
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Effects of pesticides on aquatic macrofauna in the field
Promotores: W.J.G.M. Peijnenburg, G.R. de Snoo, Co-promotor: M.G. Vijver
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Synthesis and applications of cell wall glycopolimer fragments from Staphilococci and Enterococci
Carbohydrates are present on the surface of bacteria making them suitable antigen candidates for vaccine development. This thesis deals with the synthesis of two carbohydrate-based components; the capsular polisaccharide of S. aureus type 5 and teichoic acids from staphilococci and enterococci speci…
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Cyclophellitol and its derivatives: synthesis and application as beta-glycosidase inhibitors
Promotores: Prof.dr. H.S. Overkleeft, Prof.dr. G.A. van der Marel
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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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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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Witnessing the Process of Bacterial Cell Death: Novel Antimicrobials and Their Mechanisms of Action
This thesis describes the antimicrobial discovery strategy developed in our group, the den Hertog Group at the Hubrecht Institute. It includes a cultivation-based screening approach for novel antimicrobial agents from the source of fungi, and a bacterial time-lapse imaging approach for antimicrobial…
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Photocatalytic approaches for carbon-heteroatom bond construction
Photocatalysis has emerged as a powerful tool for enabling challenging transformations in organic synthesis. This thesis explores the development of several photocatalytic reactions designed to form carbon-heteroatom bonds from less-functionalized precursors.
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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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Crossing boundaries
Celebrating 20 years of environmental research in Cagayan Valley and Sierra Madre
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Management implications for invertebrate assemblages in the Midwest American agricultural landscape
Promotor: G.R. de Snoo Co-promotor: C.J.M. Musters
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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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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.