Results 81 to 90 of about 16,570 (284)

Mechanochemical topological defects in an active nematic

Physical Review E
We propose a reaction-diffusion system that converts topological information of an active nematic into chemical signals. We show that a curvature-activated reaction dipole is sufficient for creating a system that dynamically senses topology by producing a concentration field possessing local extrema coinciding with $\pm\frac{1}{2}$ defects.
Michael M. Norton, Piyush Grover
openaire   +3 more sources

Wet Ball Milling Synthesis of Iron Oxide Nanoparticles for High‐Efficiency, Controllable Magnetic Hyperthermia in Ovarian Cancer

Advanced Materials Technologies, EarlyView.
A wet ball‐milling method is presented to synthesize iron magnetic nanoparticles and evaluate their magnetic hyperthermia performance. Optimized particles (∼270 nm, Ms ∼114 emu/g) achieve ∼50°C heating under clinically safe alternating magnetic fields, while pulsed‐field operation enables controlled temperature regulation (∼30°C).
Shahriar Mostufa, Bahareh Rezaei, Md Shahriar, Karla Mercedes Paz González, Anil Kumar, Changxue Xu, Yun Suk Eo, Ioannis H. Karampelas, Jenifer Gómez‐Pastora, Rui He, Kai Wu   +10 more
wiley   +1 more source

Mechanochemical Coupling in Spin-Labeled, Active, Isometric Muscle [PDF]

Biophysical Journal, 1999
Observed effects of inorganic phosphate (P(i)) on active isometric muscle may provide the answer to one of the fundamental questions in muscle biophysics: how are the free energies of the chemical species in the myosin-catalyzed ATP hydrolysis (ATPase) reaction coupled to muscle force? Pate and Cooke (1989. Pflugers Arch. 414:73-81) showed that active,
Baker, Josh E., LaConte, Leslie E.W., Brust-Mascher, Ingrid, Thomas, David D.   +3 more
openaire   +2 more sources

Self‐Soldering, Stretchable and Self‐Healing Liquid Metal Elastomer Interconnections for Soft Electronics Platforms

Advanced Materials Technologies, EarlyView.
A self‐healing and electrically conductive liquid metal elastomer enables robust self‐soldering of surface mount devices for soft electronics. Photothermally activated conductive pathways, strong pressure‐sensitive adhesion, and stable package‐integrated contacts provide high conductivity and extreme stretchability.
Su Thiri San, Ahmed Albeltagi, Mikko Nelo, Jari Juuti, Jarkko Tolvanen, Jari Hannu   +5 more
wiley   +1 more source

A fibrocontractive mechanochemical model of dermal wound\ud closure incorporating realistic growth factor kinetics [PDF]

, 2011
Fibroblasts and their activated phenotype, myofibroblasts, are the primary cell types involved in the contraction associated with dermal wound healing.
Hall, C. L., Maini, P. K., McCue, S. W., McElwain, D. L. S., Murphy, K. E.   +4 more
core  

Understanding Mechanochemical Coupling in Kinesins Using First-Passage Time Processes

, 2004
Kinesins are processive motor proteins that move along microtubules in a stepwise manner, and their motion is powered by the hydrolysis of ATP. Recent experiments have investigated the coupling between the individual steps of single kinesin molecules and
A. B. Kolomeisky, A. B. Kolomeisky, A. Yildiz, Alex A. Popov, Anatoly B. Kolomeisky, D. Bray, Evgeny B. Stukalin, H. Lodish, J. Howard, K. Svoboda, M. E. Fisher, N. G. van Kampen   +11 more
core   +1 more source

Flexible and High‐Performance Perovskite‐Polymer Composites for Dual X‐Ray and Proton Direct Detection

Advanced Optical Materials, EarlyView.
A polymer–perovskite composite obtained by mechanochemical synthesis enables thick, tunable active layers for efficient absorption of highly penetrating ionizing radiation. Vertical‐electrode detectors achieve low X‐ray detection limits and high sensitivity direct 5 MeV proton sensing.
Camilla Bordoni, Bas A. H. Huisman, Joost W. C. Reinders, Ilaria Fratelli, Massimo Chiari, Laura Basiricò, Henk J. Bolink, Andrea Ciavatti, Michele Sessolo, Beatrice Fraboni   +9 more
wiley   +1 more source

Chromosome movement in lysed mitotic cells is inhibited by vanadate. [PDF]

, 1978
Mitotic PtK1 cells, lysed at anaphase into a carbowax 20 M Brij 58 solution, continue to move chromosomes toward the spindle poles and to move the spindle poles apart at 50% in vivo rates for 10 min.
CANDE, W. Zacheus, Wolniak, S
core   +1 more source

Mechanochemical Activation of Polymer-Embedded Photoluminescent Benzoxazole Moieties [PDF]

ACS Macro Letters, 2018
Despite an increasing number of studies that have investigated mechanochemical effects in polymers, the number of polymers whose fluorescence characteristics change upon exposure to mechanical stress is still limited. We here report the investigation of a mechanofluorophore based on an aliphatic ester of 2-(2'-hydroxyphenyl)benzoxazole.
Marc Karman, Ester Verde-Sesto, Christoph Weder   +2 more
openaire   +2 more sources

ECM‐Stiffness Mediated Persistent Fibroblast Activation Requires Integrin and Formin Dependent Chromatin Remodeling

Advanced Science, EarlyView.
Prolonged exposure to stiff extracellular matrix drives cancer‐associated fibroblasts into a persistently activated myofibroblast state. Two parallel pathways are identified: β1 integrin activation smoothens the nuclear lamina to reduce lamin–chromatin contacts, while the formin mDia2 regulates nuclear actin to alter chromatin organization.
Swathi Packirisamy, Oscar André, Zhimeng Fan, Pontus Nordenfelt, Vinay S Swaminathan   +4 more
wiley   +1 more source