The most important reason for intensity fluctuations seems to be the relative movement of the camera with respect to the anode; such a movement may be caused either by mechanical or by temperature effects, which cannot be avoided even by careful stabilization of the room temperature: The X-ray...
21 RF (slicing) Femtosecond laser "pump" X-ray optics, chopper Sample (liquid jet) Detector Storage ring Figure 1: Schematic diagram of a generic synchrotron ultrafast pump-probe beamline. A radiofrequency (RF) clock determines the pulse timing of both the storage ring and an optical laser ...
All measurements were taken at room temperature. C and N K-edge NEXAFS was measured using the partial electron yield detector with a 150 V retardation potential. The Fe 2p3/2 L3-edge NEXAFS was measured with a 470 V retardation potential. A linear background, fitted to the pre-edge back...
Crystal structure of CO-bound cytochrome c oxidase determined by serial femtosecond X-ray crystallography at room temperature. Proc Natl Acad Sci USA , 2017 , 114: 8011 -8016 CrossRef PubMed Google Scholar [127] Dasgupta M, Budday D, de Oliveira S H P, et al. Mix-and-inject XFEL...
The output voltage is then delivered to the low-noise amplifier of the WFEE operated at room temperature. Fig. 8 Left) Illustration of the feedback loop used to null out the magnetic field sensed by the SQUID [40]. Right) Schematic [41] of 2-column × 2-row TDM. Each dc-biased ...
X-ray coronary angiography (CAG) is a primary imaging technique for diagnosing coronary diseases, one of the leading causes of death in the world. From CAG, the morphology of coronary arteries is obtained from real-time interpretation in the catheterization room, and quantitative coronary angiography...
were added and mixed at the defined volume fraction. The resulting mixture was poured in a Petri dish to obtain a 2 mm-thick bulk, and immediately degassed in a vacuum environment for 5 min at\(8\times 10^{3}\)Pa to eliminate air bubbles. Afterwards, it was left for curing at room...
Because this fraction is relatively small at room temperature, it has been a limiting factor in the sensitivity of NMR imaging. The spinning nucleus responds to the external magnetic field like a gyroscope precessing around the direction of the gravitational field. The rotating or precessional ...
The protein solutions were subsequently centrifuged at 21 000g for 5 min at room temperature and set up for crystallization. Control experiments were prepared in exactly the same manner without heat incubation. Crystals analyzed were those obtained after 1 week of equilibration. The average I/σ ...
10. A high vacuum X-ray tube provided with an anode, a cold metallic cathode solid at room temperature, and an auxiliary electrode spaced in close proximity to said cathode to produce a high potential gradient at said cathode sufficient to cause field emission of electrons with an attendant me...