Results 51 to 60 of about 2,821,004 (350)

Substrate specificity of Burkholderia pseudomallei multidrug transporters is influenced by the hydrophilic patch in the substrate‐binding pocket

FEBS Letters, EarlyView.
Multidrug transporters BpeB and BpeF from the Gram‐negative pathogen Burkholderia pseudomallei have a hydrophilic patch in their substrate‐binding pocket. Drug susceptibility tests and growth curve analyses using an Escherichia coli recombinant expression system revealed that the hydrophilic patches of BpeB and BpeF are involved in the substrate ...
Ui Okada, Satoshi Murakami
wiley   +1 more source

Study of Uniaxial Tensile Properties of Hexagonal Boron Nitride Nanoribbons

, 2017
Uniaxial tensile properties of hexagonal boron nitride nanoribbons and dependence of these properties on temperature, strain rate, and the inclusion of vacancy defects have been explored with molecular dynamics simulations using Tersoff potential.
Dhar, Rajkumar, Mojumder, Satyajit, Motalab, Mohammad Abdul, Paul, Ratul, Saha, Sourav, Tasnim, Tamanna   +5 more
core   +1 more source

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

Use of strain, strain rate, tissue velocity imaging, and endothelial function for early detection of cardiovascular involvement in patients with beta-thalassemia

Annals of Pediatric Cardiology, 2017
Background: Global ventricular function often remains normal in patients with beta-thalassemia major. (β-TM) until late. Tissue Doppler and strain imaging may be useful to assess regional myocardial function abnormalities in these patients.
Abhinav Gupta, Aditya Kapoor, Shubha Phadke, Archana Sinha, Shridhar Kashyap, Roopali Khanna, Sudeep Kumar, Naveen Garg, Satyendra Tewari, Pravin Goel   +9 more
doaj   +1 more source

Perga under compressive loading [PDF]

Journal on Processing and Energy in Agriculture, 2017
Paper dealt with the experimental testing of the perga cylinder samples at the compressive loading in the longitudinal direction. The perga is bee product and it represents the material created from the bee pollen by means of the lactic fermetation ...
Kubík Ľubomír, Brindza Ján, Brovarskyi Valeryi, Velychko Serhii   +3 more
doaj   +1 more source

In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS

FEBS Letters, EarlyView.
We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka, Yuxi Liu, Stefano Maggi, Debnath Ghosal, Jue Wang, Prashant P. Damke, Stephen D. Carter, Wei Zhao, Sukhithasri Vijayrajratnam, Joseph P. Vogel, Carrie L. Shaffer, Grant J. Jensen   +11 more
wiley   +1 more source

Strain-Rate and Stress-Rate Models of Nonlinear Viscoelastic Materials

Mathematics
The paper is devoted to the modeling of nonlinear viscoelastic materials. The constitutive equations are considered in differential form via relations between strain, stress, and their derivatives in the Lagrangian description.
Claudio Giorgi, Angelo Morro
doaj   +1 more source

Revisiting the Rate-Dependent Mechanical Response of Typical Silicon Structures via Molecular Dynamics

Nanomaterials, 2022
Strain rate is a critical parameter in the mechanical application of nano-devices. A comparative atomistic study on both perfect monocrystalline silicon crystal and silicon nanowire was performed to investigate how the strain rate affects the mechanical ...
Yi Liu, Wei Wan, Quan Li, Zhenkang Xiong, Changxin Tang, Lang Zhou   +5 more
doaj   +1 more source

Machine for use in monitoring fatigue life for a plurality of elastomeric specimens [PDF]

, 1977
An improved machine is described for use in determining the fatigue life for elastomeric specimens. The machine is characterized by a plurality of juxtaposed test stations, specimen support means located at each of the test stations for supporting a ...
Fitzer, G. E.
core   +1 more source

Relaxation oscillations and negative strain rate sensitivity in the Portevin - Le Chatelier effect

, 2000
A characteristic feature of the Portevin - Le Chatelier effect or the jerky flow is the stick-slip nature of stress-strain curves which is believed to result from the negative strain rate dependence of the flow stress.
A. Arneodo, A. H. Cottrell, A. Milik, A. Portevin, A. Rosen, A. van den Beukel, B. Deng, B. J. Brindley, C. Caroli, D. Barkley, D. Maugis, F. Heslot, F. Le Chatelier, G. Ananthakrishna, G. Ananthakrishna, G. Ananthakrishna, G. Ananthakrishna, G. Ananthakrishna, G. Ananthakrishna, G. Ananthakrishna, H. Neuhäuser, L. P. Kubin, L. P. Kubin, L. P. Kubin, M. A. Lebyodkin, M. Bekele, M. Bekele, M. J. B. Hauser, M. T. M. Koper, O. E. Rössler, P. G. McCormick, P. Penning, S. J. Noronha, S. J. Noronha, V. Jeanclaude, W. Eckhaus   +35 more
core   +1 more source