Promotor: Prof.dr. H.S. Overkleeft

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.

Bacteria often experience external challenges, such as changes in environmental conditions or attacks by bacteriophages.

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.

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.

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.

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.

Fate and toxicity of copper nanoparticles was related to the water chemistry of the environment and pristine size.

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.

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…

Promotor: Prof.dr. M. Ubbink, Co-promotor: G. Siegal

DNAmarkerpoint heeft als doel ecologie, evolutie en biodiversiteit beter te begrijpen door het bestuderen van modern en ancient DNA.

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.

Cyclic peptides are investigated as a platform to induce different orientations between various ligands.

Projecten van de afdeling Environmental Biology

Evolution acts via mutations in amino acid sequences. Substitution of essential amino acids leads to a nonfunctional protein. l.

Wetenschappers Bibi van den Berg en Ionica Smeets staan in de Opzij Top 100, de jaarlijkse lijst met invloedrijkste vrouwen van Nederland.

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.

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.

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.

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…

What is the optimal design of sandy solutions for sustainable climate change adaption, from an ecological, biophysical and societal point of view?

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.

Om leraar te worden in het voortgezet onderwijs heb je een onderwijsbevoegdheid nodig, die je kunt behalen aan de Universiteit Leiden.

De Nobelprijs voor Scheikunde 2017 is uitgereikt aan Jacques Dubochet, Richard Henderson en Joachim Frank, voor hun ontwikkeling van de cryo-elektronenmicroscopie. Met deze techniek kunnen biomoleculen in 3D in beeld gebracht worden, legt hoogleraar Ultrastructuurbiologie Ariane Briegel uit.

This thesis focuses on the design and synthesis of activity-based probes and inhibitors targeting enzymes involved in the degradation of specific plant glycans.

Cytotoxic T-cells (CTLs) are involved in the clearance of viruses and killing of tumor cells.

Promotor: H.S. Overkleeft, Co-promotor: M. van der Stelt

Promotor: G. A. van der Marel, Co-promotor: D. V. Filippov

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.

Promotores: W.J.G.M. Peijnenburg, G.R. de Snoo, Co-promotor: M.G. Vijver

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…

Promotores: Prof.dr. H.S. Overkleeft, Prof.dr. G.A. van der Marel

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…

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.

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…

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.

This dissertation was to develop effective graphene-based nanofluidic devices by developing scalable fabrication methods and elucidating proton transport mechanisms.

Celebrating 20 years of environmental research in Cagayan Valley and Sierra Madre

Promotor: G.R. de Snoo Co-promotor: C.J.M. Musters

A new type of tripodal squaramide-based supramolecular hydrogels is developed and studied.

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.

Overkleeft

Leiden University offers a unique range of summer courses where you can broaden or deepen your knowledge or share your expertise with fellow students. The choice of academic courses is very diverse, ranging from Law, Big Data, Languages and Linguistics to Maths and Natural Sciences, Biology, Biomedical…

Promotores: Prof.dr. W.J.G.M. Peijnenburg & Dr. M.G. Vijver

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.

This thesis combines field and laboratory studies to address some of the most pressing questions in the field of microplastic research.

The research presented in this thesis explores the chemotherapeutic potential of metal-based compounds as chemotherapy agents, with an initial focus on the synthesis and DNA interaction studies of platinum and palladium compounds utilizing the [Pt(bapbpy)]2+ scaffold. The study identifies intercalation…

Endocannabinoids are lipid messengers that modulate various physiological functions by activating the cannabinoid CB1 and CB2 receptors. While the metabolism of endocannabinoids and their action at the CB receptors is fairly well studied, the molecular mechanisms governing their release and transport…

Anthropogenic change is reshaping ecological systems, raising concerns about increasing transmission of infectious diseases. Among these, mosquito-borne diseases may be particularly sensitive to environmental change, as their transmission depends on vector populations.