Results 61 to 70 of about 791,939 (337)

Structural insights into lacto‐N‐biose I recognition by a family 32 carbohydrate‐binding module from Bifidobacterium bifidum

FEBS Letters, EarlyView.
Bifidobacterium bifidum establishes symbiosis with infants by metabolizing lacto‐N‐biose I (LNB) from human milk oligosaccharides (HMOs). The extracellular multidomain enzyme LnbB drives this process, releasing LNB via its catalytic glycoside hydrolase family 20 (GH20) lacto‐N‐biosidase domain.
Xinzhe Zhang, Naoki Sunagawa, Toma Kashima, Kiyohiko Igarashi, Akimasa Miyanaga, Shinya Fushinobu   +5 more
wiley   +1 more source

Dual-layer dual-energy CT for improving differential diagnosis of squamous cell carcinoma from adenocarcinoma at gastroesophageal junction

Frontiers in Oncology, 2022
ObjectiveTo examine the clinical values of dual-energy CT parameters derived from dual-layer spectral detector CT (SDCT) in the differential diagnosis of squamous cell carcinoma (SCC) and adenocarcinoma (AC) of the gastroesophageal junction (GEJ ...
Meihong Wu, Mao Sheng, Ruomei Li, Xinna Zhang, Xingbiao Chen, Yin Liu, Bin Liu, Yongqiang Yu, Xiaohu Li   +8 more
doaj   +1 more source

Tensorial depolarization of alkali atoms by isotropic collisions with neutral hydrogen

, 2012
Results. We consider the problem of isotropic collisions between an alkali atom and neutral hydrogen. We calculate the collisional tensorial components of general p and s-states, characterized by their effective principal quantum number $n^{*}$.
Derouich, Derouich, Derouich, Fano, Kerkeni, M. Derouich, Nienhuis, Omont, Sahal-Bréchot   +8 more
core   +1 more source

The Caenorhabditis elegans DPF‐3 and human DPP4 have tripeptidyl peptidase activity

FEBS Letters, EarlyView.
The dipeptidyl peptidase IV (DPPIV) family comprises serine proteases classically defined by their ability to remove dipeptides from the N‐termini of substrates, a feature that gave the family its name. Here, we report the discovery of a previously unrecognized tripeptidyl peptidase activity in DPPIV family members from two different species.
Aditya Trivedi, Rajani Kanth Gudipati
wiley   +1 more source

Quantum anti-Zeno effect without wave function reduction

, 2010
We study the measurement-induced enhancement of the spontaneous decay (called quantum anti-Zeno effect) for a two-level subsystem, where measurements are treated as couplings between the excited state and an auxiliary state rather than the von Neumann's ...
A Degasperis, A Peres, AG Kofman, AG Kofman, AG Kofman, AG Kofman, AG Kofman, AM Lane, B Elattari, B Misra, C Search, CP Sun, E Block, ES Fry, G Harel, GJ Milburn, H Zheng, K Koshinoa, L Zhou, LA Khalhin, LE Ballentine, LE Ballentine, P Facchi, P Facchi, PG Kwiat, Q Ai, Q Ai, RJ Cook, S Ashhab, S Ashhab, S Ashhab, S Pascazio, SA Gurvitz, SJ Freedman, T Petrosky, T Petrosky, V Frerichs, WM Itano, XB Wang, XF Cao   +39 more
core   +1 more source

Effective Quantum Dynamics of Interacting Systems with Inhomogeneous Coupling [PDF]

, 2006
We study the quantum dynamics of a single mode/particle interacting inhomogeneously with a large number of particles and introduce an effective approach to find the accessible Hilbert space where the dynamics takes place. Two relevant examples are given:
C. E. López, E. Solano, H. Christ, J. C. Retamal, P. Rungta, R. Mani   +5 more
core   +2 more sources

Peptide‐based ligand antagonists block a Vibrio cholerae adhesin

FEBS Letters, EarlyView.
The structure of a peptide‐binding domain of the Vibrio cholerae adhesin FrhA was solved by X‐ray crystallography, revealing how the inhibitory peptide AGYTD binds tightly at its Ca2+‐coordinated pocket. Structure‐guided design incorporating D‐amino acids enhanced binding affinity, providing a foundation for developing anti‐adhesion therapeutics ...
Mingyu Wang, Grace Du, Charity Yongo‐Luwawa, Angelina Lu, Brett Kinrade, Kim Munro, Karl E. Klose, William D. Lubell, Peter Davies, Shuaiqi Guo   +9 more
wiley   +1 more source

The Nature of Metal Artifacts in X-ray Computed Tomography and Their Reduction by Optimization of Tomography Systems Parameters

Applied Sciences, 2023
A significant gap in the known methods for assessing the levels of metal artifacts in X-ray computed tomography and approaches to their reduction is an almost complete disregard for the physical nature of this artifact—the proximity to zero of ...
Sergey Pavlovich Osipov, Sergei Vladimirovich Chakhlov, Vadim Yurevich Zhvyrblia, Dmitry Andreevich Sednev, Oleg Sergeyevich Osipov, Eugeny Yurevich Usachev   +5 more
doaj   +1 more source

Discrepancies in Atomic Data and Suggestions for their Resolutions

, 2017
The analysis and modelling of a range of plasmas (for example: astrophysical, laser-produced and fusion), require atomic data for a number of parameters, such as energy levels, radiative rates and electron impact excitation rates, or equivalently the ...
Aggarwal, K. M.
core   +2 more sources

Interplay between circadian and other transcription factors—Implications for cycling transcriptome reprogramming

FEBS Letters, EarlyView.
This perspective highlights emerging insights into how the circadian transcription factor CLOCK:BMAL1 regulates chromatin architecture, cooperates with other transcription factors, and coordinates enhancer dynamics. We propose an updated framework for how circadian transcription factors operate within dynamic and multifactorial chromatin landscapes ...
Xinyu Y. Nie, Jerome S. Menet
wiley   +1 more source