199 search results for “crystal” in the Public website
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Geometry and Topology in Active and Driven Systems
The key characteristic of active matter is the motion of an emergent collection (such as a flock of birds), which is driven by the consumption of energy by its active components (i.e. individual birds).
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Exploring chemical space in covalent and competitive glycosidase inhibitor design
Glycoside hydrolases (glycosidases/GHs) are widely abundant enzymes in all kingdoms of life and are important biocatalysts that catalyze the hydrolysis of glycosidic linkages in oligo/polysaccharides, glycoproteins and glycolipids with tremendous efficiency
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Magnetic imaging of spin waves and magnetic phase transitions with nitrogen-vacancy centers in diamond
The elementary excitations of magnets are called spin waves, and their corresponding quasi-particles are known as magnons. The rapidly growing field of Magnonics aims at using them as information carriers in a new generation of electronic devices, (almost) free of electric currents.
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Fundamental research on the voltammetry of polycrystalline gold
Voltammetry plays a crucial role in modern scientific research by offering valuable insights into the electrochemical properties of materials, with wide-ranging applications in fields such as materials science, energy storage, corrosion studies, and sensor development.
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David Doelman
Science
doelman@strw.leidenuniv.nl | +31 71 527 2727
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Research
Developing computational algorithms for structural biology -A high resolution, three dimensional view of a molecule provides detailed information that help elucidate its function: by knowing the exact arrangement of atoms in a molecule, we can understand disease, develop drugs to combat them and improve…
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Ab initio molecular dynamics calculations on reactions of molecules with metal surfaces
Promotor: Prof.dr. G.J. Kroes
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Visualizing cityscapes of Classical antiquity
This study aims to make a practical contribution to a new understanding and use of 3D reconstructions, namely as ‘laboratories’ to test hypotheses and visualize, evaluate and discuss alternative interpretations.
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Structural characterization of bacterial proteins involved in antibiotic resistance and peptidoglycan biosynthesis
This thesis describes the structural and biochemical characterization of the β-lactamase BlaC from Mycobacterium tuberculosis (Mtb), and the Alr and YlmE proteins from Streptomyces coelicolor A3(2).Mtb is the main cause of tuberculosis.
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Painting with starlight : optical techniques for the high-contrast imaging of exoplanets
This thesis describes the development and validation of new high-contrast imaging techniques, with the ultimate goal of enabling the next generation of instruments for ELT-class telescopes to directly image Earth-like extra-solar planets orbiting around nearby stars.
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Another Brick in the Wall: The role of the actinobacterial cell wall in antibiotic resistance, phylogeny and development
Streptomyces are multicellular, Gram-positive bacteria in the phylum of actinobacteria which produce a high amount of bioactive natural products of which the expression is tightly coordinated with the life cycle.
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Leiden University Centre for International Relations
The Leiden University Centre for International Relations (LUCIR) is a multi-disciplinary platform promoting research and education on international relations at Leiden University.
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Stable single molecules for quantum optics and all-optical switches
Promotor: Prof.dr. M.A.G.J. Orrit
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Michel Orrit Lab - Single Molecule Optics
Since the early 1990s, one can isolate the optical signal of a single molecule and single-molecule spectroscopy has quickly grown into an important research field.
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The effect of the chain length distribution of free fatty acids on the mixing properties of stratum corneum model membranes
The stratum corneum (SC) plays a fundamental role in the barrier function of the skin. The SC consists of corneocytes embedded in a lipid matrix.
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Riches Beyond the Horizon
Long-distance Trade in Early Medieval Landscapes (ca. 6th-12th centuries)
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Joan van der Waals colloquium
The Joan van der Waals colloquium is an ongoing bi-weekly lecture series.
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And the winner is… Results of the annual physics image competition
Salt crystals, a nano-sized golf stick and molten glass. The LION Image Award competition of 2023 yielded a lot of beautiful images once again. But in the end, only one can be the winner.
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Leiden Political Economy Group (L-PEG)
The Leiden Political Economy Group (L-PEG) is a multi-disciplinary network of scholars with a research interest in (comparative / global) political economy based at Leiden University. Our members belong to various institutes and faculties across Leiden University, and from other universities across…
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In shape for photoregulation
How does the photoregulation mechanism work in detail?
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Surface Reactivity of Activated CO2 Selective use of energy in splitting CO2
Juurlink
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Leiden Institute of Chemistry
The Leiden Institute of Chemistry (LIC) is the basis for research and collaborations of the Leiden chemistry groups. Chemistry is the central science enabling a healthy future in a sustainable society. Chemistry researchers at Leiden University take a fundamental approach in finding tailored solutions…
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On Display: Instagram, the Self, and the City
Discover the impact of Instagram on our daily lives in the book On Display. Boy and Uitermark delve into the platform's influence on our social interactions.
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John Mydosh and the mystery of the Hidden Order
A 35-year-old uranium crystal will not disclose its secret: what causes a dramatic phase transition at 17.5 Kelvin? Thanks to a new artificial intelligence approach, half of the possible explanations are excluded, but the definitive answer remains to be found. 'It is very frustrating', says physicist…
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Data-Driven Drug Discovery Network (D4N)
The Data-Driven Drug Discovery Network (D4N) is an initiative by researchers from Leiden University and collaborators to join efforts in applying and developing novel techniques from data science to drug discovery and related topics from bioinformatics.
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Collateral Management: more or less risk?
Jacques Sevat discussed the practical and legal aspects of global collateral management: collateral management to reduce the credit risks a global bank such as ING Bank runs every day.
- The pentagonal universe of Gerard Caris
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More effective blocking of CCR2 receptor
The discovery of new medicines is a tedious and lengthy process. On average, over 10,000 molecules need to be studied for one to become a drug and reach the patient. Part of that process are the very costly clinical trials in humans, and candidate drugs often fail due to side effects or lack of efficacy.…
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Colloidal LEGO with peptides
Kros
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Events calendar
LIAS PhD program activities include thematic coursework (the PhD Seminars), generic skills training, library training, research presentations, social events, and so on. They are open to all LIAS PhD candidates.
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Leiden Observatory
With each discovery that is made, the universe reveals a fraction of its secrets: the most distant galaxies and quasars, the atmosphere of exoplanets, evidence of dark matter, complex molecules in space. This is what fills the days and nights of the researchers from the Leiden Observatory and their…
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Selectivity
Target selectivity is an important aspect of any drug molecule, and certainly a parameter to be optimized. That is not trivial for a number of reasons. First of all hundreds of drug targets (receptors, enzymes, ion channels) exist, and no single lab in the world has assays for all of them.
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Computational Drug Discovery
Research in this group, headed by Gerard van Westen, focusses on computational methods integrated in different parts of the drug discovery process. More specifically, topics include innovative treatments for cancer, selectivity modeling, translational research, allosteric modulation, drug resistance…
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Video: Leiden University awards Kiem grant to interdisciplinary initiatives
With a 'Kiem grant' of up to €10,000, Leiden University stimulates initiatives in research and education where diverse fields of study meet. This interdisciplinary approach helps solve complex issues.
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KiKa grant for mathematician: how statistics helps fight bone cancer
Using mathematics to help children with bone cancer. It sounds a little strange, but for statistician Marta Fiocco, it's just her job. She gets a substantial grant from KiKa for it. With that money, she is going to study the effect of chemotherapy adjustments.
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Controlling active matter with curvature
Nematic liquid crystals form the key ingredients of most tv screens. The active version of these complex fluids forms a useful model for physicists to research the responses of active matter—like bacteria or traffic flows—to mechanical and geometrical cues. An international research team publishes their…
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New insight brings sustainable hydrogen one step closer
Leiden chemists Marc Koper and Ian McCrum have discovered that the degree to which a metal binds to the oxygen atom of water is decisive for how well the chemical conversion of water to molecular hydrogen takes place. This insight helps to develop better catalysts for the production of sustainable hydrogen,…
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Leiden physicists image lumpy superconductor
High-temperature superconductivity is one of the big mysteries in physics. Milan Allan’s research group used a Josephson Scanning Tunneling Microscope to image spatial variations of superconducting particles for the first time, and published about it in the journal Nature.
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Training
As a PhD candidate, you are expected to follow certain courses and training programmes in the context of your training as a researcher. The courses and training programmes will help you conduct your research, write your dissertation, develop your career, and gain self-insight. The LACDR PhD training…
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Breakthrough in uncrackable quantum encryption
An important discovery makes it possible to communicate complex information among multiple people without the message being cracked. The communication can also relate to complex information.
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Surprising similarity between stripy black holes and high-temperature superconductors
We don’t understand how some materials become superconducting at relatively high temperatures. Leiden physicists have now found a surprising connection with auxiliary black holes. It enables us to use our knowledge of black holes on the mystery of high-temperature superconductivity. Publication in Nature…
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Searching for quasicrystals near Kamchatka
Quasicrystals are crystals with ‘impossible’ five-fold symmetries, which nevertheless were synthesized in the lab in 1982. Paul J. Steinhardt helped figure out their structure, but he didn’t stop at that.
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Physics in the picture: cancer cells as an explosion of fireworks
When you think of physics, do you think only of complicated formulas? You’re not the only one. Therefore, every year, the Leiden Insitute of Physics organises the LION Image Award to show another side of physics: beautiful images about intriguing science. The winner of the 2022 photo competition captured…
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Cathodic corrosion: devastating but predictable
An indian stepwell on a nanoscale. That is what postdoc Nakkiran Arulmozhi calls the pattern he saw when he corroded a special kind of platinum crystal. The unique images show the destructiveness of the process, but also show how predictable it is.
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BSc Project Research Presentatie Giel Keijsers, 19 december @ 09:30, HL207
Het project heeft plaats gevonden in de QMO groep onder begeleiding van Dr. Michiel de Dood en Dr.ir. Sense Jan van der Molen. De titel van de presentatie is:
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Lunch Seminar: Governing Delivery Platform Companies
On Monday 22 April, Dr. Crystal Ennis, Dr. Shivant Jhagroe, and Dr. Yujing Tan will presented the progress of their Seed Grant project 'Governing Delivery Platform Companies'. This project examines the interaction between platform companies, local authorities, workers, and households to understand the…
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Negotiating Fiscal Norms, Property and Labour in Eighteenth-Century Dutch Colonial Sri Lanka
This project focuses on Dutch registration of land and people in rural Sri Lanka. How did the practice of “fixating” the fluid social relations and dynamic daily practices into categories affect family strategies of reproduction and survival?
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Events
One of LUCIR’s key objectives is to bring together scholars and students of International Relations. To this end, LUCIR regularly organises events such as conferences, roundtables, lectures and book launches.
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Alumni
Former PhD, Bachelor and Master students of the Van Exter Lab
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Science and society Faculty of Science Leiden
We also conduct research to make meaningful contributions to society. For instance, by talking about our research, contributing to community projects or by inviting people to help us with our research. Scroll down and discover how Science and Society can mutually reinforce each other.