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

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

This thesis explores squaramide-based supramolecular polymers and hydrogels, enhancing their mechanical strength for 3D cell culture.

The primary goal of this research is to deepen our understanding of substrate-enzyme interactions in Glycoside hydrolases. For this purpose, Bacillus circulans xylanase (BcX) has been selected as a well-established model to examine the Michaelis complex and glycosyl-enzyme adduct.

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.

Promotor: Prof.dr. M. Ubbink

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

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.

N-acylethanolamines (NAEs), including N-arachidonoylethanolamine (anandamide, AEA), N-palmitoylethanolamine (PEA) and N-oleoylethanolamine (OEA), are signaling lipids that play an important role in different physiological process.

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.

Promotor: Prof.dr. G.A. van der Marel, Co-Promotor: J.D.C. Codée

The main goal of this thesis is to achieve advanced control of binding properties in bis-pyrrolic and macrocyclic pyrrolic receptors by light.

Inaugurale rede

The thesis describes terrestrial field trials aimed to detect side-effects of pesticides within the framework of pesticide registration procedures. Field trials were developed using vascular plants Brassica napus and Poa annua, caterpillars Pieris brassicae and effects on decomposition were studied…

This thesis describes the use of an activity-based proteomics method to study the endocannabinoid system.

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…

The research described in this thesis combines the latest insights in lysosomal function with lysosome centred cell signalling.

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…

Promotor: Prof.dr. J.P. Abrahams

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.

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

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

If mankind wants to survive into the 22nd century, we will need to change the way we live drastically. The human impact on our planet is everywhere, we are changing the atmosphere, the oceans and the land, leading to global warming, climate change, loss of biodiversity and pervasive pollution. There…

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…

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…

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

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

Promotor: G.R. de Snoo, Co-promotores: M.G. Vijver, J.P.M. Vink

Soil biodiversity is of great importance for the maintenance of multifunctionality in terrestrial ecosystems.

The research of the Applied Mathematics cluster is concerned with such diverse topics as dynamical systems, representation theory, differential equations and pattern recognition.

This multidisciplinary minor provides students with knowledge on how and why humans became the way they are. The minor focuses on the evolution of the species Homo sapiens from other hominin lineages and animal ancestors, and on the various factors shaping this process. Not only is human evolution of…

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

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.

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.

Promotie

Promotie

Hoe kunnen we onze maatschappij zo inrichten dat de wereld leefbaar blijft voor onszelf en al het andere leven om ons heen? Aan dat vraagstuk werken Leidse wetenschappers samen vanuit allerlei disciplines, van biologie tot datawetenschap en van milieueconomie tot archeologie.

Hoe detecteren bacteriën signalen uit hun omgeving en hoe passen ze zich daaraan aan? Die vraag intrigeert Ariane Briegel, hoogleraar Ultrastructuurbiologie. Met behulp van nieuwe technieken produceert ze driedimensionale beelden, die nieuwe informatie geven over het zintuiglijke systeem van bacteri…

In hoeverre hopen nanodeeltjes zich op in planten en dieren, en welke eigenschappen van de deeltjes spelen hierbij een rol? Willie Peijnenburg, hoogleraar Milieutoxicologie en biodiversiteit kreeg een Marie-Curie beurs toegekend om onderzoek te doen naar de milieueffecten van nanodeeltjes.

Aan de hand van de karakteristieke aspecten van een beeld kunnen bepaalde computers ons vertellen wat het beeld laat zien. Ze kunnen dit leren op dezelfde manier als jonge kinderen beelden kunnen leren herkennen. Het verder verbeteren van deze technieken opent de weg naar een hele reeks nieuwe toepassingen.…

Aan de hand van de karakteristieke aspecten van een beeld kunnen bepaalde computers ons vertellen wat het beeld laat zien. Ze kunnen dit leren op dezelfde manier als jonge kinderen beelden kunnen leren herkennen. Het verder verbeteren van deze technieken opent de weg naar een hele reeks nieuwe toepassingen.…

Om goed onderbouwde besluiten over complexe onderwerpen zoals het klimaat, recht en gezondheid te kunnen nemen, zijn wetenschappelijke resultaten van groot belang. Maar wetenschappelijke resultaten bevatten altijd een mate van onzekerheid. Binnen het onderzoek Communicatie over onzekerheden wordt onderzocht…

Promotor: A. Kros

Plant diversity is essential for us and our planet as it sustains the stability of our ecosystems, provides vital materials and food to us and supports many ecosystem services.

Supramolecular polymers are class of materials that are formed by non-covalent interactions such as hydrogen bonding, π-π interactions, electrostatic interactions and the hydrophobic effect.

Endothelial dysfunction and microvascular diseases are key drivers of cardiovascular disease, the world's leading cause of death.

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