352 search results for “cosmic rays” in the Public website
- In situ Surface Resonant X-Ray Diffraction to probe the electronic structure at electrochemical interfaces
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MASCARA stations hunt for exoplanets orbiting bright stars
For a number of years, two ‘boxes’ in the Canary Islands and Chile have been scouring the skies for exoplanets that orbit bright stars. PhD candidate Geert Jan Talens helped develop these ‘MASCARA’ telescopes and has made the first discoveries with them. Together with him, we answer the main questions…
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This Week’s Discoveries | 16 January 2018
Lecture
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Resolving the building blocks of galaxies in space and time
We investigate the buildup of galaxies from various vantage points. The first two chapters focus on the stellar content of galaxies, especially the distribution of stellar masses at birth and potential variations therein in various galactic environments.
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Exploring the magnetic, turbulent Milky Way through radio waves
Promotor: Prof.dr. H. J. A. Röttgering, Co-Promotor: Dr. M. Haverkorn
- Leiden Observatory
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Leiden Institute of Physics
Research at the Leiden Institute of Physics (LION) is foundational and curiosity driven. All our scientists share a desire to increase the knowledge of the world around us, in an open atmosphere of inquiry from which innovative ideas emerge that provide applications and value for society.
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Probing new physics in the laboratory and in space
The Standard Model (SM) of particle physics fails to explain several observed phenomena and is incomplete. In order to resolve this problem, one may extend the SM by adding new particles.
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Weighing heavenly bodies based on bending light
Many astronomers suspect that most of the matter in the universe is invisible. So how can you weigh dark matter if you can't actually see it? Professor Henk Hoekstra is looking for a solution. Inaugural lecture 25 June.
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Fusion of X-ray angiography and Optical Coherence Tomography for coronary flow simulation
PhD Defence
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Winds in the AGN environment: new perspectives from high-resolution X-ray spectroscopy
PhD Defence
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X-ray spectroscopy of interstellar dust: From the laboratory to the Galaxy
PhD Defence
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Clues from stellar catastrophes
Promotores: S.F. Portegies Zwart, E. M. Rossi
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Network flow algorithms for discrete tomography
Promotor: R. Tijdeman, Co-promotor: H.J.J. te Riele
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Buddhist and Hindu Metal Images of Indonesia: Evidence for shared artistic and religious networks across Asia (c.6th-10th century)
Mathilde Mechling defended her thesis on 28 january 2020.
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The structure of the dusty cores of active galactic nuclei
Promotor: W. Jaffe, Co-promotor: K. Meisenheimer
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Cathodic corrosion
Cathodic corrosion is a relatively unknown phenomenon that can severely etch metallic electrodes at cathodic (negative) potentials.
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In vitro model systems for studying the impact of organic chemicals on the skin barrier lipids
This paper describes two synthetic lipid models designed to replace human stratum corneum (SC) in studies of the impact of volatile organic chemicals on the molecular organization of the skin barrier lipids.
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TAILored surfaces in Operando conditions: structure and Reactivity
This meeting will be devoted to recent advances in the operando investigation of reactivity at surfaces from both experimental and theoretical points of view.
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Impaired barrier of inflammatory skin diseases
Focus in skin research
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Understanding the physical properties that affect the lipid organization in the skin barrier
It is the aim of this project to better understand how the physical properties of lipids influences the structure and overall barrier function of the skin.
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On Terminal Alkynes That Can React with Active-Site Cysteine Nucleophiles in Proteases
Active-site directed probes are powerful in studies of enzymatic function. We report an active-site directed probe based on a warhead so far considered unreactive.
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Reconstruction Methods for Combined HAADF-STEM and EDS Tomography
The research in this thesis is focused on tomographic reconstruction based on two imaging modalities in electron microscopy.
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Atomic Insights into Hydrodesulfurization
Hydrodesulfurization (HDS) is an ubiquitous part of oil refining that ensures that fuels are cleaned of impurities and environment release of pollutants such as SOx and NOx gasses are minimized.
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Van Marum Colloquium - Catalyzing Green Hydrogen: Tracking Iridium Oxide & Platinum Behavior During Catalysis
Lecture
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Van Marum Colloquium - Catalyzing Green Hydrogen: Tracking Iridium Oxide & Platinum Behavior During Catalysis
Lecture
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Postdoctoral researcher in structural biology of glycan-modifying enzymes
Science, Leiden Institute of Chemistry (LIC)
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Tradition and Innovation: Conrad Gessner and Sixteenth-Century Ichthyology (1551-1602)
This PhD subproject concentrates on 16th-century ichthyology and takes Gessner’s Historia piscium (1558) (further HP) as its point of departure and focus.
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PhD in physical chemistry: operando spectroscopy on platinum electrocatalysts
Science, Leiden Institute of Chemistry (LIC)
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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.…
- Growth of graphene on liquid copper: an operando surface X-ray diffraction and optical microscopy study
- Segregation in a Pt-Rh Alloy Nanoparticle Revealed by In Situ Coherent X-ray Diffraction Imaging
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Unveiling the invisible conformational landscape of cytochrome P450
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Software developments in automated structure solution and crystallographic studies of the Sso10a2 and human C1 inhibitor protein
Promotor: J.P. Abrahams, Co-Promotor: N.S. Pannu
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Nanoparticulate Impurities in Pharmaceutical-Grade Sugars and their Interference with Light Scattering-Based Analysis of Protein Formulations
PURPOSE: In the present study we investigated the root-cause of an interference signal (100-200 nm) of sugar-containing solutions in dynamic light scattering (DLS) and nanoparticle tracking analysis (NTA) and its consequences for the analysis of particles in biopharmaceutical drug products.
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Captured on paper: fish books, natural history and questions of demarcation in eighteenth-century Europe (ca. 1680–1820)
On the28th of September Didi van Trijp successfully defended a doctoral thesis and graduated.
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Microscopy and Spectroscopy on Model Catalysts in Gas Environments
In surface science there is great effort to move from studying simple, flat model surfaces in vacuum to investigating more complex model catalysts in gas environments (in situ). This thesis gives three examples of such studies using microscopy and spectroscopy.
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Intercellular Skin Barrier Lipid Composition and Organization in Netherton Syndrome Patients
Netherton Syndrome (NTS) is a rare genetic skin disease caused by mutations in the serine protease inhibitor Kazal-type 5 gene, which encodes the lympho-epithelial Kazal-type-related inhibitor. NTS patients have a profound impaired skin barrier function. Because SC lipids play a crucial role in the…
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Van Marum Colloquium - Monitoring the dynamics of the heterogeneous interface during electrocatalysis
Lecture
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modeling of the hot Universe: Advances and challenges in high-resolution X-ray spectroscopy
PhD Defence
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From Universe of Visnu to Universe of Siva
Around the sixth and seventh centuries, South and Southeast Asia saw a great religious change: Saivism largely took over from Vaisnavism. We’re going to look at the way in which Saivism, the religion of the god Siva, presented itself with respect to Vaisnavism. In particular we’ll investigate the role…
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Invited speakers
Speakers that have accepted to participate:
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A much sharper picture of the universe with new algorithms and supercomputers
With new algorithms and supercomputers, an incredibly detailed radio map of the universe was created. Now astronomers can look at radio data of galaxies with much more precision. This was published in Nature Astronomy by Leiden PhD student Frits Sweijen and colleagues.
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Astronomer Joe Callingham testifies against killer stars in new show on Discovery Channel
On Friday evening 17 September, Leiden astronomer Joe Callingham can be seen in a new series on Discovery channel. Killers of the Cosmos is about different deadly dangers lurking in the depths of space. Asteroids, cosmic debris, electromagnetic weapons… The show takes a film-noir approach to these threats,…
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FRESH Lecture: Ambient pressure x-ray photoelectron spectroscopy: a tool for the monitoring of surface chemical processes at realistic pressure
Lecture
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Former LION PhD Student Wins GNN Dissertation Prize
The 2015 Dissertation Prize of the Global Neutrino Network has been awarded to Tri Astraatmadja, who was part of the Leiden/Nikhef ANTARES group during his PhD research. Astraatmadja receives the award for his thesis 'Starlight between the waves: In search of TeV photon emission from Gamma-Ray Bursts…
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Charlemagne's Workshops
An Investigation into the role of copper-alloy craft production in the early medieval economy of northwest Europe.
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PhD in physical chemistry: operando spectroscopy on IrOx and RuOx electrocatalysts
Science, Leiden Institute of Chemistry (LIC)
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Deep imaging
A computer can look at, and learn from, many more images than a human specialist. AI systems are rapidly becoming indispensable for medical and biological applications. But they still have to learn how to explain their decisions.
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Invited speakers
Speakers that have accepted to participate: