Results 41 to 50 of about 7,622,278 (249)

Simulation of avalanche low-gain sensor performance in X-ray detection [PDF]

مجله علوم و فنون هسته‌ای
X-ray applications in imaging and beyond require efficient and optimal detectors. Energy separation, time loss, and manufacturing cost are among the features that led us to design a semiconductor detector.
M. Dansi, M.B. Fathi
doaj   +1 more source

Functional comparison of EncB and EncC cargo proteins in iron storage within the Myxococcus xanthus encapsulin

FEBS Letters, EarlyView.
Encapsulins are protein nanocompartments that play an important role in iron storage. In the Myxococcus xanthus encapsulin system, two cargo proteins called EncB and EncC contribute to iron mineralization. Here, we show that EncB and EncC generate iron‐containing minerals with distinct chemical compositions, suggesting that the composition of stored ...
Harry B. McDowell, Thomas Walther, Egbert Hoiczyk   +2 more
wiley   +1 more source

Structural and biochemical analysis of a B12 superbinder

FEBS Letters, EarlyView.
BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices, Jacob J. Whittaker, Dirk J. Slotboom, Albert Guskov   +3 more
wiley   +1 more source

A design of source spacing of the X-ray density logging tool based on numerical simulation

He jishu, 2022
Background In recent years, with increased awareness of environmental protection and safety, the development of nuclear logging tools using non-chemical sources such as X-ray instead of chemical sources like 137Cs has become a new trend.
WU Huilin, LI Yulian, JIN Ya, ZHANG Qiong   +3 more
doaj   +1 more source

X-Ray Detectors

, 2004
This chapter contains sections titled: Semiconductor Detectors for (Imaging) X‐ray Spectroscopy Gas Proportional Scintillation Counters for X‐ray Spectrometry Superconducting Tunnel Junctions Cryogenic Microcalorimeters Position Sensitive Semiconductor ...
P. Lechner, P. Gryboś, G. Lutz, E. Figueroa-Feliciano, Figueroa‐Feliciano, E, Da̧browski, W, Soltau, H, Kurakado, M, Strüder, L, W. Da̧browski, Galeazzi, M, Gryboś, P, M. Kurakado, C. A. N. Conde, M. Galeazzi, L. Strüder, Conde, C. A. N, Holl, P, Lechner, P, H. Soltau, P. Holl, Lutz, G   +21 more
core   +1 more source

The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation

FEBS Letters, EarlyView.
Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge, Vivian Pogenberg, Alexander Baumgart, Bente Siebels, Hartmut Schlüter, Michael Hecht‐Bucher, Aymelt Itzen   +6 more
wiley   +1 more source

Fluorescence-line-selective soft X-ray absorption spectroscopy: a novel approach to element-specific electronic structure analysis

Journal of Synchrotron Radiation
A novel approach to soft X-ray fluorescence-yield absorption spectroscopy is presented using a superconducting tunnel junction (STJ) X-ray detector, a new type of detector for the soft X-ray region.
Kota Naito, Nobuo Nakajima, Shigetomo Shiki   +2 more
doaj   +1 more source

The heterodimeric amino acid transporters (HAT) of the SLC7/SLC3 family: A structure−function relationships and relevance to human pathology

FEBS Letters, EarlyView.
Heterodimeric amino acid transporters consist of SLC7 and SLC3 family proteins arranged in a conserved structural organization. They regulate nutrient transport across cell membranes, supporting essential cellular functions. These transporters also contribute to xenobiotic/drug uptake and distribution.
Mariafrancesca Scalise, Tiziano Mazza, Raffaella Scanga, Lara Console, Michele Galluccio, Cesare Indiveri   +5 more
wiley   +1 more source

Smaller is better: nanobodies meet NMR

FEBS Letters, EarlyView.
Nanobodies are single‐domain antigen‐binding fragments derived from camelid heavy chain antibodies. Their small size, high stability, and exceptional specificity make nanobodies uniquely useful probes for NMR studies of protein dynamics, transient conformational states, and protein–protein interactions.
Oleg Y. Dmitriev
wiley   +1 more source

View synthesis for depth from motion 3D x-ray imaging. [PDF]

, 2009
The depth from motion or kinetic depth X-ray imaging (KDEX) technique is designed to enhance the luggage screening at airport checkpoints. The technique requires multiple views of the luggage to be obtained from an arrangement of linear X-ray detector ...
Liu, Y
core