Results 101 to 110 of about 2,721,612 (374)
Magnetic tweezers to capture the fast-folding λ6-85 in slow motion
Communications PhysicsForce spectroscopy gives access to the underlying free energy landscape of protein folding. Proteins exhibit folding rates between microseconds and hours.
César Augusto Quintana-Cataño +5 more
doaj +1 more source
Methods and Protocols, 2020 Precise creation, maintenance, and monitoring of neuronal circuits would facilitate the investigation of subjects such as neuronal development or synaptic plasticity, or assist in the development of neuronal prosthetics.
Frank H. Kung, Ellen Townes-Anderson
doaj +1 more source
Optical trapping core formation and general trapping mechanism in single-beam optical tweezers
New Journal of Physics, 2022 The working mechanism of single-beam optical tweezers is revisited using a recently established method. The optical force is split into conservative and nonconservative components, and these components are explicitly calculated for particles in the ...
Di Huang +7 more
doaj +1 more source
Micromachines, 2022 Cooperative manipulation through dual-arm robots is widely implemented to perform precise and dexterous tasks to ensure automation; however, the implementation of cooperative micromanipulation through dual-arm optical tweezers is relatively rare in ...
Yoshio Tanaka, Ken’ichi Fujimoto
doaj +1 more source
Advanced Functional Materials, EarlyView.The pre‐internalization phase of endocytosis remains poorly characterized at single‐cell levels. Single‐cell pre‐internalization mechanics are investigated using advanced robotic techniques. Cancer cells exhibit biphasic adhesion – rapid initial binding followed by reinforcement – while fibroblasts show gradual engagement.
Houari Bettahar +6 more
wiley +1 more source
Computational toolbox for optical tweezers in geometrical optics [PDF]
, 2014 Optical tweezers have found widespread application in many fields, from physics to biology. Here, we explain in detail how optical forces and torques can be described within the geometrical optics approximation and we show that this approximation provides reliable results in agreement with experiments for particles whose characteristic dimensions are ...
arxiv +1 more source
Fundamental constraints on particle tracking with optical tweezers
, 2012 A general quantum limit to the sensitivity of particle position measurements is derived following the simple principle of the Heisenberg microscope. The value of this limit is calculated for particles in the Rayleigh and Mie scattering regimes, and with ...
Ditchburn R W +8 more
core +1 more source
Definitions, 2020 Objective An optical tweezers apparatus uses a tightly focused laser to generate a trapping force that can capture and move small particles under a microscope. Because it can precisely and non-destructively manipulate objects such as individual cells and
Jurij Kotar
semanticscholar +1 more source
Optical Tweezers to Study Viruses
, 2013 A virus is a complex molecular machine that propagates by channeling its genetic information from cell to cell. Unlike macroscopic engines, it operates in a nanoscopic world under continuous thermal agitation. Viruses have developed efficient passive and active strategies to pack and release nucleic acids.
J. Ricardo Arias-Gonzalez +1 more
openaire +4 more sources
Optical tweezers for single cells [PDF]
Journal of The Royal Society Interface, 2008 Optical tweezers (OT) have emerged as an essential tool for manipulating single biological cells and performing sophisticated biophysical/biomechanical characterizations. Distinct advantages of using tweezers for these characterizations include non-contact force for cell manipulation, force resolution as accurate as 100 aN and amiability to liquid ...
Zhang, H., Liu, K.
openaire +4 more sources