307 zoekresultaten voor “biological cock” in de Publieke website
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Anisotropy, multivalency and flexibility-induced effects in colloidal systems
We have studied the impact of particle shape anisotropy, multivalent interactions and flexibility on systems of micron-sized colloidal particles.
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Uncovering vulnerabilities in triple-negative breast cancer
Triple-negative breast cancer (TNBC) constitutes a small subtype (~15%) of breast cancer, but causes the majority of breast cancer-related deaths.
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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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From pixels to patterns: AI-driven image analysis in multiple domains
This thesis investigates the application of deep learning techniques in image analysis across various domains, focusing on four main themes: feature extraction, classification, segmentation, and integration, demonstrating the transformative potential of these technologies.
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Novel factors modulating AGC kinase signaling-controlled polar auxin transport
The PID-directed shift in PIN polarity has been broadly accepted as one of the essential mechanisms for the regulation of auxin transport polarity.
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Does it still hurt?
The last decades it is increasingly recognized that acute as well as chronic postoperative pain is an important problem. Treatment and prevention of postoperative pain is a challenge, especially in special patient populations where there is only limited guidance on how to optimally use opioids.
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Electron Paramagnetic Resonance Approaches to Study Biologically Relevant Reactions: Examples from Amyloid Aggregation to Enzymes
This thesis explores how electron paramagnetic resonance (EPR) spectroscopy can be used to investigate key biochemical processes.
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Algorithms for analyzing and mining real-world graphs
Promotor: Prof.dr. J.N. Kok, Co-Promotor: W.A. Kosters
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Affinity-based profiling of the adenosine receptors
The adenosine receptors are proteins that reside in the extracellular membranes of cells. Activation of adenosine receptors plays a role in many physiological and pathological processes, such as immune responses and cancers.
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Evaluation of the zebrafish embryo as an alternative model for hepatotoxicity testing
Promotor: Prof.dr. B. van de Water, Co-promotores: L.T.M. van der Ven, A.S. Kienhuis
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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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Using cryo-EM methods to uncover structure and function of bacteriophages
Bacteriophages, or phages for short, are the most abundant biological entity in nature. They shape bacterial communities and are a major driving force in bacterial evolution.
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Functional analysis of agrobacterium tumefaciens virulence protein VirD5
Supervisor: P.J.J. Hooykaas
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Lipid nanoparticle technology for mRNA delivery: Bridging vaccine applications with fundamental insights into nano-bio interactions
Lipid nanoparticles (LNPs) have enabled the success of mRNA vaccines but remain limited in broader therapeutic use by challenges in delivery efficiency, targeting, and mechanistic understanding.
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Colloidal mechanical metamaterials
This thesis describes how to scale down concepts of macroscopic mechanical metamaterials to the thermal scale using a system of flexibly-linked colloids.
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Forces and symmetries in cells and tissues
The way organisms develop from the initial single-cellular state to a complex final assembly like the human body, and how the final body is maintained throughout life, is one of the greatest mysteries and it’s understanding one of the biggest scientific challenges.
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Acquired resistance in pancreatic cancer: characterization and exploration of actionable targets of a multifactorial disease
Pancreatic ductal adenocarcinoma (PDAC) is among the cancers with the highest mortality rate, despite a relatively low incidence.
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Een grappig blok rubber als rekenmachine
Promovenda Jiangnan Ding onderzoekt hoe je een blok rubber zo kunt ontwerpen dat het dienst kan doen als een mechanische computerbit. Zo'n zogenaamd mechanisch metamateriaal wordt op een specifieke manier samengeperst om de vorm te veranderen. ‘Met een heel eenvoudig materiaal kunnen we in de toekomst…
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Nieuwe professor Luca Giomi creëert zijn eigen natuurkunde van levende systemen
Zwermen drones, voetgangers of de cellen in je lichaam. Dat zijn allemaal voorbeelden van actieve materie: materialen waarvan de bouwstenen autonoom kunnen bewegen. Dat is wat Luca Giomi bestudeert. Giomi is per 1 januari 2024 benoemd tot hoogleraar theoretische natuurkunde op het gebied van zachte…
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Een stuk rubber kan niet tellen. Toch?
Martin van Hecke en Lennard Kwakernaak ontwikkelen in hun onderzoek met universiteit leiden en amolf een mechanisch metamateriaal dat tot tien kan tellen.
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Een primeur in het lab: een piepklein netwerk dat sterk én flexibel is
Het is de groep van Daniela Kraft gelukt om een netwerk van microdeeltjes te maken dat zowel sterk als volledig flexibel is. Dat klinkt misschien simpel, maar toch zijn ze wereldwijd de eersten die hierin geslaagd zijn. Een heuse doorbraak in de natuurkunde van zachte materie.
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De loopbaankeuzes van cellen
Hoe beslist een embryonale stamcel of het een hart- of een niercel wordt? Dat is de vraag die rekenkundig biologe Maria Mircea bestudeerde voor haar promotieonderzoek. Ze keek naar de binnenkant van individuele cellen om te analyseren hoe ze veranderen. Dit is wat ze ontdekte.
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More than just a number: modelling biological aging and vulnerability
Promotie
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Eenrichtingsweg voor beweging in nieuw materiaal
Onderzoekers hebben een materiaal ontwikkeld dat ingaat tegen een van de basisprincipes van de natuurkunde. Reguliere materialen die ingedrukt worden, verspreiden de druk gelijkmatig, ongeacht waar die vandaan komt. Het nieuwe materiaal breekt met deze wetmatigheid en dat kan interessant zijn voor toepassingen…
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Biophysical characterization of membrane protein-small molecule interactions
Promotor: Prof.dr. M. Ubbink
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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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Nano shapes micro : Impacts of metallic nanoparticles on microbial communities
This thesis aimed to investigate the impact of exposure dynamics, relative contributions of ENPs(particle) and ENPs(ion), and dosing regimens on the toxicity of ENPs varying in different physico-chemical properties, on the composition and functioning of soil microbial communities.
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Can tigers survive in human-dominated landscapes?
S.S. Kolipaka’s thesis questions and investigates the survival prospects of reintroduced tigers and their offspring’s in the human dominated landscape of Panna tiger reserve in India.
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Systematics, Epidermal defense and Bioprospecting of Wild Orchids
This thesis presents the systematics, epidermal defense, and bioprospecting of wild orchids.
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Towards artificial photosynthesis on the lipid bilayer of liposomes
Artificial photosynthesis has recognised potential to produce green and sustainable fuels from earth-abundant resources such as water, carbon dioxide (CO2), and sunlight.
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Role of integrin adhesions in cellular mechanotransduction
Promotor: B. vd Water, T. Schmidt, Co-Promotor: E.H.J. Danen
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Liposome-based vaccines for immune modulation: from antigen selection to nanoparticle design
Nanoparticles can be used as delivery systems for both small molecules and macromolecules such as proteins, peptides or oligonucleotides. This thesis focuses on the use of liposomes, nanometric vesicles formed by a lipid bilayer enclosing an aqueous core. Liposomes are highly versatile delivery syst…
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Bioorthogonal Antigens as Tool for Investigation of Antigen Processing and Presentation
In order to be able to develop effective medicine and treatments to prevent or cure autoimmune diseases or cancer we need to understand the mechanisms how they arise and what drives their course.Unravelling the fundamental molecular mechanisms influencing the onset and course of diseases such as allergies,…
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Cyclophellitol analogues for profiling of exo- and endo-glycosidases
To this day, all cyclophellitol-based inhibitors and ABPs have been close analogues of their natural substrate counterparts. As a result, these probes showed high selectivity towards their target glycosidases.
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Accelerating the Photocatalytic Water Splitting in Catalyst−Dye Complexes
As a virtually inexhaustible source, solar energy plays a major role in future global energy scenarios.
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Multi-Biomarker Pharmacokinetic-Pharmacodynamic Relationships of Central Nervous Systems Active Dopaminergic Drugs
Discovery and development of Central Nervous System (CNS) drugs is hampered by high attrition rates.
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The impact of defense hormones on the interaction between plants and the soil microbial community
The soil ecosystem consists of the largest reservoir of biodiversity on Earth.
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Multi-omics studies of the control of growth and antibiotic production of Streptomyces
Actinobacteria are Gram-positive bacteria that have a complex multicellular life cycle and are well known for their ability to produce a wide range of bioactive natural products (NPs).
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Illuminating N-acylethanolamine biosynthesis with new chemical tools
In this thesis, the discovery and optimization is described of chemical tools to study the N-acylethanolamine (NAE) biosynthetic pathway.
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The heart of oxygenic photosynthesis illuminated
Promotor: Prof.dr. H.J.M de Groot, Co-Promotor: A. Alia
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Statistical physics and information theory for systems with local constraints
Systems with local constraints is a new finding in recent researches on complex systems. The heterogeneous spatial interactions and the temporal dependencies among those numerous units make it difficult to describe by traditional statistical physics.
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Inhibitor Selectivity: Profiling and Prediction
Less than 1 in 10 drug candidates that enter phase 1 clinical trials actually gets approved for human use.
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Extracellular Matrix Mechanics in the Regulation of the early steps of the Metastatic Cascade
Metastasis is responsible for over 90% of cancer-related deaths and arises from the ability of a small subset of tumor cells to detach from the primary tumor, overcome multiple biochemical and mechanical barriers, disseminate through the body, and colonize distant organs.
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Geribbeld plastic onthult principe voor programmeerbare materialen
Martin van Hecke en Anne Meeussen publiceren in het tijdschrift Nature over mechanische metamaterialen. Ze hebben een nieuwe klasse multistabiele materialen ontdekt. Dit is gebaseerd op ribbeltjes plastic.
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Hoe zwermen vogels zonder te botsen? Inzicht in collectieve bewegingen in heterogene populaties
De Leidse natuurkundigen Alexandre Morin en Samadarshi Maity bestuderen zelforganisatie en flocking-verschijnselen. Ze werpen licht op zwermgedrag, wat helpt om te begrijpen hoe het kan dat vogels in een zwerm niet botsen. Met plastic microkralen creëerden ze een experimentele opstelling en ze ontwikkelden…
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En de winnaar is... Resultaten van de jaarlijkse fotowedstrijd natuurkunde
Zoutkristallen, een golfstick van nanoformaat en gesmolten glas. De LION Image Award-wedstrijd van 2023 leverde weer een heleboel prachtige beelden op. Maar uiteindelijk kan er maar één de winnaar zijn.
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Dubbelbenoeming zeven nieuwe Medical Delta-hoogleraren
Zeven nieuwe Medical Delta-hoogleraren ontvouwen hun onderzoeksplannen in een oratiemarathon op 21 juni. De hoogleraren van de Universiteit Leiden, het LUMC, de TU Delft en het Erasmus MC Rotterdam opereren op het snijvlak van de life sciences en gezondheid en technologie.
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Mapping Medieval Malaria
This research project studies the distribution and impact of medieval malaria in the Netherlands.
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Neurolaw
Neurolaw is een relatief jonge discipline, waarin de impact van de neurowetenschappen op het recht, de juridische praktijk en de criminologie wordt onderzocht. De actuele ontwikkelingen binnen de neurowetenschappen (neurobiologie, -psychologie en -psychiatrie) hebben de betekenis van onderzoek op dit…
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Het winnen van de Pharmaceutical Research Meritorious Manuscript Award 2016
De publicatie van de groep Catherijne Knibbe werd in 2016 bekroond met de AAPS Pharmaceutical Research Meritorious Manuscript Award.