1,950 search results for “mechanism metamaterials” in the Public website
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A time-space translation mechanism for patterning the vertebrate anteroposterior axis
My PhD project studies how the temporally sequential Hox gene expression is regulated during head-tail patterning of the frog embryo.
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Freedom of additional signals on genes: on the combination of DNA mechanics, genetics and translation speed
DNA carries various forms of information. Out of these forms of information the most well-known is classical genetic information.
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Physicists find way to control fractures
Rigid materials break more easily than floppy ones. This simple observation allows to predict and control the width of cracks. Theoretical understanding of how materials break is useful in for example the production of cars or screens. Publication in PNAS.
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Unraveling the auxin mechanism in 2,4-D induced somatic embryogenesis in Arabidopsis thaliana
Promotor: P. J. J. Hooykaas, Co-promotor: R. Offringa
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Do fungi differ? Understanding the mechanisms of mycorrhizal fungal impacts on soil C sequestration
How presence, abundance and enzymatic activities of AM and EM fungi differently affect soil carbon sequestration processes?
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Exploring and exploiting the mechanism of mycelial pellet formation by Streptomyces
Promotor: G.P. van Wezel
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Material built from gears
A specifically designed collection of gears is soft on one end and rigid on the other. These are robust properties of the system that hold even in the presence of manufacturing imperfections. This emerging research area may lead to new ways of designing geared devices like satellite trackers or watches.…
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Exploring the mechanism of targeted nanoparticle-mediated drug delivery using the zebrafish model
Exploring the mechanism of targeted nanoparticle-mediated drug delivery using the zebrafish model
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Mechanisms and consequences of horizontal gene transfer in cell wall-deficient cells of Kitasatospora viridifaciens
The bacterial cell wall is a nearly universal structure that offers protection and gives the cell its shape. However, environmental stressors, such as cell wall-targeting antibiotics and hyperosmotic conditions, can induce bacteria to shift to a wall-deficient state. It is unknown whether the lack of…
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Martin van Hecke elected APS fellow
Metamaterials researcher Martin van Hecke has been elected American Physical Society (APS) fellow, an honour exclusive to only half a percent of the society's members.
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Chemokine signaling mechanisms underlying inflammation and infection control: insights from the zebrafish model
This thesis focuses on the role of chemokine receptors CXCR3 and CCR2 in the inflammatory process and infection control using the zebrafish model.
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Mutagenic mechanisms in normal and neoplastic B cells: From AID- induced diversification to genome-wide patterns
PhD defence
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Noonan and LEOPARD syndrome in zebrafish: molecular mechanisms and cardiac development
Promotor: Prof.dr. J. den Hertog
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Countering Terrorist Narratives: Assessing the Efficacy and Mechanisms of Change in Counter-narrative Strategies
This study presents the findings of a laboratory-based experiment testing hypothesised processes implicated in the prevention of violent radicalisation through counter-narratives. The central aims of the study were to contribute to counter-narrative theory, whilst highlighting the value of experimental…
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High throughput microscopy of mechanism-based reporters in druginduced liver injury
Promotor: B. van de Water
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Zebrafish xenograft model: identification of novel mechanisms driving prostate cancer metastasis
Prostate cancer (PCa) is one of the most prevalent cancer in males.
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In vitro investigation of the photoprotection mechanism of Light Harvesting Complex II
Solar energy is used by photosynthetic organisms to drive energy required cellular processes. Is absorbed by two groups of pigments, located in the LHCs.
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Unraveling the mechanism of multicopper oxidases: from ensemble to single molecule
Promotores: Prof.dr. G.W. Canters, Prof.dr. T.J. Aartsma
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Cognitive control in context: Neural, functional, and social mechanisms of metacontrol.
To argue that people can control the relative contributions of goal-driven and stimulus-driven processes to decision-making and action selection.
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induces an anti-inflammatory effect: in vivo studies and molecular mechanism of action
Source: Mediators Inflamm (2014)
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The development of the speech production mechanism in young children: evidence from the acquisition of onset clusters in Dutch
On October 31st, Margarita Gulian succesfully defended her doctoral thesis and graduated. The Leiden University Centre for Linguistics congratulates Margarita on this great result.
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Rediscovering the lost pedal techniques on harps with a single‐action pedal mechanism
The “harpe organisée”, 1720-1840: Rediscovering the lost pedal techniques on harps with a single-action pedal mechanism, is the title of Maria Christina Cleary's PhD thesis. This is the first monographic study on harp pedal techniques, tracing the historical way to pedal on the early pedal harps with…
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Copper(II) Tris(2‐pyridylmethyl)amine Complex through a Stepwise Mechanism
The mechanism of the electrochemical reduction of dioxygen by a mononuclear pyridylalkylamine copper complex was investigated (see picture). It was shown that in neutral aqueous solution dioxygen undergoes stepwise reduction, wherein hydrogen peroxide plays a key role. The rate constants determined…
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MSc Research Presentation Daan van Velzen 8 September @ 10:00
The project has been done in the Mechanical Metamaterials group under the supervision of Prof.dr. Martin van Hecke and MSc Anne Meeussen . The title of the presentation is: ''Elastic Moduli of Smooth and Corrugated Thin Silicone Rubber Sheets.
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Where photons meet phonons
We investigate how radiation pressure can be used to influence the mechanical motion of a micro-mirror suspended from springs.
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Mechanisms of renoprotection: on the anti-inflammatory roles of thrombomodulin and soluble FLT1 in renal disease
PhD defence
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The activation mechanisms of G protein-coupled receptors: the case of the adenosine A2B and HCA2/3 receptors
Promotor: A.P. IJzerman
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The peculiar effect of a small error
Metamaterials have properties that depend on their shape and architecture. Researchers at AMOLF, Leiden University and Tel Aviv University have found a new way of designing these metamaterials and their properties by deliberately incorporating small errors. They publish their results today in Nature…
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ERC grant for calculating materials
Physicist Martin van Hecke receives a 2.5 million euro ERC research grant for research into information processing materials. Starting out with a piece of rubber that can count to ten.
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A computer made of floppy rubber
A piece of corrugated rubber can function as a simple computer, displaying memory and displaying the ability to count to two. Leiden physicists describe the computing rubber in the journal PNAS. ‘Simple materials can process information, and we want to find the principles behind that.’
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Non-Abelian Metamaterials: Emergent computing and memory
PhD defence
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Lowlands visitors will teach scientists more about quantum mechanics
Goldband, Skrillex, Róisín Murphy and... quantum: the latter may not be a band but is part of the Lowlands line-up nonetheless. Scientists from Leiden University are using the festival for research on the very smallest particles.
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Mechanism captured behind platinum catalyst
Cars are equipped with catalysts to disarm toxic exhaust gases. Platinum plays an important role there. Leiden physicists and chemists have now for the first time seen the mechanism behind a platinum catalyst. With a fundamental understanding of the process, scientists can use this rare material more…
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brain target site concentrations on the basis of CSF PK: impact of mechanisms of blood-to-brain transport and within brain distribution
Promotor: Prof.dr. M. Danhof, Co-promotor: E.C.M. de Lange
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Building with flexible blocks
On an apparently normal cube a pattern of hollows and bulges appears when the cube is compressed. A method has been developed to design such three-dimensional structures and to construct these using simple building blocks. Publication in Nature.
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Quantum Mechanics Course for Physics teachers
Leiden University organizes a course on quantum mechanics for high school Physics teachers. As the curriculum gains a new quantum component, the university enables teachers to give the best possible guidance to their students.
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Mechanism MRI amplifying agents explored
Special amplifying agents can make MRI scanners and NMR techniques hundreds of times more sensitive. Leiden physicists have now found a method to test their efficiency. More sensitive MRI scans could for example improve our understanding of cystic fibrosis or Parkinson’s disease. Publication in PCCP…
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Research Seminar on Human Rights Reviewing Mechanisms
On the 2nd of June, Valentina Carraro gave a lecture on the complementarity of human rights reviewing mechanisms in the United Nations and presented an original framework to assess the extent to which institutions within regime complexes repeat or contradict each other when delivering recommendations…
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How does the European Stability Mechanism safeguard financial stability?
On Wednesday 5 June, Kalin Anev Janse, Secretary-General and Management Board Member of the European Stability Mechanism (ESM), was invited to give a lecture on 'Bridging decision-making: a new direction for Europe? Prioritising financial stability: the European Stability Mechanism and the Banking U…
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New water jet cutter for Fine Mechanical Department
The Fine Mechanical Department's (FMD) new Wardjet A0612 will cut anything using a 4000 bar water jet. This enables the FMD to work faster, more accurately, and to perform more versatile jobs.
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Cancer cell mechanism found to be used against itself
Leiden biophysicists have found a new possible way to attack cancer cells. They have located ‘sinkholes’ on the cells where receptor proteins disappear from the surface. If a drug could push these proteins towards those areas, it would kill the cancer cell.
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On the geometry of demixing: A study of lipid phase separation on curved surfaces
Like a mixture of oil and water, lipid membranes separate into two liquid phases.
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Anna BablFaculteit der Sociale Wetenschappen
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Giulia CallegaroScience
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for the beauty of physics
Leiden Physics Poster
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Conference The Development of Normative Powers of UN Investigative Mechanisms
The Grotius Centre for International Legal Studies in collaboration with the University of Geneva, the Chinese Journal of International Law (ChineseJIL, OUP) and the European Society of International Law (ESIL), are pleased to invite public international scholars and researchers to attend a conference…
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From grains to planetesimals: the microphysics of dust coagulation
Promotor: Prof.dr. A.G.G.M. Tielens, Prof.dr. C. Dominik (UvA)
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Hof awarded EU funding for research on age verification and consent mechanisms
As part of the euCONSENT consortium, the Center for Law and Digital Technologies (eLaw) has been awarded European Commission funding to create a child rights’ centred cross-border system for online age verification and parental consent.
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Corrugated plastic unveils a new design principle for programmable materials
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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New material challenges 250 year old building principles
Researchers at FOM-institute AMOLF and the Leiden Institute of Physics (LION) have developed a rubber rod with strange bending behaviours. Beyond a certain point, it bends more under decreasing pressure. This behaviour doesn’t fit our expectations and does not conform to secular laws that predict the…