A5017315866- Soil and Environmental Studies
- Advanced X-ray Imaging Techniques
- Enzyme Structure and Function
- Particle Accelerators and Free-Electron Lasers
- Environmental Sustainability and Technology
- Water Resources and Management
- Protein Structure and Dynamics
- Medical Imaging Techniques and Applications
- Agricultural Productivity and Crop Improvement
- Particle accelerators and beam dynamics
- Agricultural Development and Policies
- Land Use and Management
- Human Health and Disease
- Particle Detector Development and Performance
- Marine and environmental studies
- Regional Socio-Economic Development Trends
- Glycosylation and Glycoproteins Research
- Electron and X-Ray Spectroscopy Techniques
- Advanced Electron Microscopy Techniques and Applications
- Food Industry and Aquatic Biology
- Engineering and Environmental Studies
- X-ray Spectroscopy and Fluorescence Analysis
- Atomic and Subatomic Physics Research
- Advancements in Photolithography Techniques
- Soil Carbon and Nitrogen Dynamics
Argonne National Laboratory
2011-2025
Lomonosov Moscow State University
2013-2024
Moscow State University
2008-2024
University of Michigan
2007-2023
Moscow State University of Civil Engineering
2023
Dubna State University
2023
Saint-Petersburg State Agrarian University
2021
Leibniz Centre for Agricultural Landscape Research
2021
Irkutsk State Medical University
2019
National Institute of General Medical Sciences
2011
Self-amplified spontaneous emission in a free-electron laser has been proposed for the generation of very high brightness coherent x-rays. This process involves passing high-energy, high-charge, short-pulse, low-energy-spread, and low-emittance electron beam through periodic magnetic field long series high-quality undulator magnets. The radiation produced grows exponentially intensity until it reaches saturation point. We report on demonstration self-amplified gain, exponential growth, at...
Radiation damage is a major limitation in crystallography of biological macromolecules, even for cryocooled samples, and particularly acute microdiffraction. For the X-ray energies most commonly used protein at synchrotron sources, photoelectrons are predominant source radiation damage. If beam size small relative to photoelectron path length, then may escape footprint, resulting less illuminated volume. Thus, it be possible exploit this phenomenon reduce radiation-induced during data...
The high-brilliance X-ray beams from undulator sources at third-generation synchrotron facilities are excellent tools for solving crystal structures of important and challenging biological macromolecules complexes. However, many the most structural targets yield crystals that too small or inhomogeneous a ;standard' beam an source, approximately 25-50 microm (FWHM) in vertical 50-100 horizontal direction. Although have microfocus beamlines other applications, this capability macromolecular...
Automated scanning capabilities have been added to the data acquisition software, JBluIce-EPICS, at National Institute of General Medical Sciences and Cancer Collaborative Access Team (GM/CA CAT) Advanced Photon Source. A `raster' feature enables sample centering via diffraction over two-dimensional grids simple rectangular or complex polygonal shape. The is used locate crystals that are optically invisible owing their small size visually obfuscated properties mount. raster also identify...
Experimental evidence for self-amplified spontaneous emission (SASE) at 530 nm is reported. The measurements were made the low-energy undulator test line facility Advanced Photon Source, Argonne National Laboratory. experimental setup and details of results are presented, as well preliminary analysis. This experiment extends to shorter wavelengths operational knowledge a linac-based SASE free-electron laser explicitly shows predicted exponential growth in intensity optical pulse function...
The trio of macromolecular crystallography beamlines constructed by the General Medicine and Cancer Institutes Collaborative Access Team (GM/CA-CAT) in Sector 23 Advanced Photon Source (APS) have been growing demand owing to their outstanding beam quality capacity measure data from crystals only a few micrometres size. To take full advantage state-of-the-art mechanical optical design these beamlines, significant effort has devoted designing fast, convenient, intuitive robust beamline...
Nonlinear optical (NLO) instrumentation has been integrated with synchrotron X-ray diffraction (XRD) for combined single-platform analysis, initially targeting applications automated crystal centering. Second-harmonic-generation microscopy and two-photon-excited ultraviolet fluorescence were evaluated detection assessed by raster scanning. Two designs constructed characterized; one positioned downstream of the sample into upstream path diffractometer. Both instruments enabled protein...
The Advanced Photon Source (APS) has undergone a comprehensive upgrade to replace the original electron storage ring with new (APS-U) that will increase X-ray brightness 500 times compared APS. National Institute of General Medical Sciences and Cancer Structural Biology Facility at (GM/CA@APS) operates national user facility for structural biology. includes canted-undulator beamlines, 23ID-B, 23ID-D. GM/CA users have been very productive, resulting in over 2100 publications almost 3600...
The present study was carried out to describe the characteristic features of potentially toxic metals (PTMs) in soil industrial city, Kolchugino–Vladimir Region–Russia. mass fractions mg/kg Cu, Pb, Zn, and Cd were measured by atomic absorption spectrometer (AAS). Multivariate statistical analysis hierarchical cluster (HCA), performed. obtained results elements mapped using ArcGIS. A total four pollution indices calculated identify areas with significant associations. data showed that...
This research aims to evaluate the dynamics of soil loss through erosion by water in agricultural lands steppe areas using a modification RUSLE2 model from 1980s 2010s. The calculation was performed raster data that included slope angle, length, erodibility, rainfall and snowmelt erosivity factors, types land use, cover management factor. All were taken open sources. average territory studied amounted 1.48 t ha−1 year−1 1.72 discrepancy with other studies 12% for level 2–7% main factor...
This paper reports on several developments of X-ray fluorescence techniques for macromolecular crystallography recently implemented at the National Institute General Medical Sciences and Cancer beamlines Advanced Photon Source. These include (i) three-band on-the-fly energy scanning around absorption edges with adaptive positioning fine-step band calculated from a coarse pass; (ii) rastering over rectangular domains locating small invisible crystals shuttle-scanning option increased speed;...
GM/CA‐CAT has developed a 1‐μm beam for challenging micro‐diffraction experiments with macromolecular crystals (e.g. small crystals) and radiation damage studies. Reflective (Kirkpatrick‐Baez mirrors) diffractive (Fresnel zone plates) optics have been used to focus the beam. Both cases are constrained by need maintain convergence. Using two different plates, 1.0×1.0 0.8×0.9 μm2 (V×H,FWHM) beams were created at 15.2 keV 18.5 keV, respectively. Additionally, introducing vertical focusing...
Recently, several important structures have been solved using micro‐crystallographic techniques that previously could not with conventional crystallography. At GM/CA‐CAT we continue to develop capabilities for difficult problems such as small crystals of large macromolecular complexes or membrane proteins grown in the lipidic cubic phase. This paper will describe three major upgrades our arsenal tools, "mini‐beam" collimators, active beamstop, and an improved goniostat. Our collimators...