Results 41 to 50 of about 6,474,819 (304)

Structural and Mechanistic Basis for Extended-Spectrum Drug-Resistance Mutations in Altering the Specificity of TEM, CTX-M, and KPC β-lactamases

Frontiers in Molecular Biosciences, 2018
The most common mechanism of resistance to β-lactam antibiotics in Gram-negative bacteria is the production of β-lactamases that hydrolyze the drugs.
T. Palzkill
semanticscholar   +1 more source

Experimental Hypervelocity Dust Impacts in Olivine—Multiscale Insights Into Microcrater Shock and Melting Effects From Coordinated SEM/TEM Observations

Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract The flux of solar system meteoroids is dominated by objects less than 1 mm in diameter whose impact effects play a major role in the space weathering of airless body surfaces. These effects remain poorly characterized with respect to their dependence on the range of impact speeds for meteoroids across the inner solar system.
R. Christoffersen, M. J. Loeffler, S. Kanee, C. J. Cline II, L. P. Keller, T. M. Erickson, J. Fontanese, T. Munsat, M. Horányi   +8 more
wiley   +1 more source

A novel approach to pulsed laser deposition of platinum catalyst on carbon particles for use in polymer electrolyte membrane fuel cells

Beilstein Journal of Nanotechnology, 2023
The research undertaken aimed to develop an efficient Pt-based catalyst for polymer electrolyte membrane fuel cells (PEMFCs) by using a cost-effective and efficient physical method to deposit platinum nanoparticles (PtNPs) on carbon supports directly ...
Bogusław Budner, Wojciech Tokarz, Sławomir Dyjak, Andrzej Czerwiński, Bartosz Bartosewicz, Bartłomiej Jankiewicz   +5 more
doaj   +1 more source

Structural characterization of newt tendon regeneration after complete transection: In vivo two‐photon imaging and transmission electron microscopy

Journal of Anatomy, Volume 248, Issue 3, Page 383-394, March 2026.
The present study characterized newt digital flexor tendon regeneration structurally at both micro‐ and nanoscales following complete transection and suggested that the mechanism of tissue regeneration differs between the early phase (until 6 weeks) and the late phase (after 6 weeks). Tendon stubs remained separated for up to 2 weeks after transection,
Tomoka Kamiya, Yusaku Ito, Tomohito Iwasaki, Daisuke Suzuki, Toshinori Hayashi, Jeonghyun Kim, Takeo Matsumoto, Eijiro Maeda   +7 more
wiley   +1 more source

Prevalence of TEM, SHV, and CTX-M Beta-Lactamase genes in the urinary isolates of a tertiary care hospital

Avicenna Journal of Medicine, 2017
Introduction: Extended-spectrum beta-lactamases (ESBLs) are the major cause of resistance to beta-lactam antibiotics such as penicillins, cephalosporins, and monobactams.
T. Bajpai, M. Pandey, M. Varma, G. Bhatambare   +3 more
semanticscholar   +1 more source

Histone methyltransferase G9a crosstalks with H3K36 histone methyltransferases NSD3 and SETD2 to mediate gene activation

Frontiers in Cell and Developmental Biology
The euchromatic histone methyltransferase G9a/KMT1C/EHMT-II functions as a corepressor and a coactivator of transcription, depending upon its association with distinct protein complexes. While the mechanisms of G9a-mediated repression are well understood,
Arunim Shah, Chandra Prakash Chaturvedi, Kulwant Singh, Shobhita Katiyar, Akhilesh Sharma   +4 more
doaj   +1 more source

ALTERNATIVE METHOD FOR DETERMINING METAL UPTAKE FROM WATER BY ESCHERICHIA COLI K12 CD3 [PDF]

مجلة الأنبار للعلوم الزراعية
Bacteria are usually applied in biotechnology in areas such as element adsorptions due to extracellular/intracellular accumulation. Electron microscopes and spectrophotometry have shown proximate/accurate methods for observing and detecting these ...
N. M. T. Jebril, A. K. Murad, R. A. Majeed, A. H. Al-Sabary, I. A. Abed, B. H. Hashim   +5 more
doaj   +1 more source

Antibacterial Resistance Pattern in Clinical and Non-clinical Bacteria by Phenotypic and Genotypic Assessment

Journal of Pure and Applied Microbiology, 2021
Bacterial infections represent a very serious problem that threatens human health, antibiotics were designed to attack the causative agents of infectious diseases, but some bacterial pathogens became virulent and resistant to antibiotics by different ...
Mohamed Shawky, Waleed B. Suleiman, Ayman A. Farrag   +2 more
doaj   +1 more source

Loading Mode Dependence of Twin‐Twin Boundary Formation in a Textured Magnesium Alloy

Advanced Materials Interfaces, Volume 13, Issue 4, 17 February 2026.
The structures of twin‐twin boundaries formed by interactions between twin variants sharing the same or different zone axes in a deformed magnesium alloy are demonstrated. Lattice distortion around complicated interfaces promotes grain refinement in the subsequent thermomechanical process, enhancing the mechanical performance of magnesium alloys ...
Yuzhi Zhu, Shiqiang Wang, Yi Chen, Guanyi Wang, Yinhu Zhao, Zidong Wang, Zhipeng Li, Dewen Hou   +7 more
wiley   +1 more source

A syntactic perspective on rhetorical purpose: The example of if-conditionals in medical editorials [PDF]

Ibérica, 2014
This paper provides an in-depth analysis of the functioning of if-conditionals in medical editorials (MEDs). As previous genre-based studies of medical discourse genres have shown, MEDs need to address at least three different types of readers and are ...
Shirley Carter-Thomas , Elizabeth Rowley-Jolivet   +1 more
doaj