Results 41 to 50 of about 377,173 (291)

Ca2+ signaling in arterioles and small arteries of conscious, restrained optical biosensor mice

open access: yesFrontiers in Physiology, 2014
Two-photon fluorescence microscopy and conscious, restrained optical biosensor mice were used to study smooth muscle Ca2+ signaling in ear arterioles. Conscious mice were used in order to preserve normal mean arterial blood pressure (MAP) and sympathetic
Seth T. Fairfax   +5 more
doaj   +1 more source

High-sensitivity two-photon absorption microcavity autocorrelator [PDF]

open access: yes, 2004
A GaAs-AlAs microcavity device has been used as a photodetector in an autocorrelator for measuring the temporal pulsewidth of 1.5-/spl mu/m optical pulses.
Barry, Liam P.   +7 more
core   +3 more sources

Two-Photon Imaging to Unravel the Pathomechanisms Associated with Epileptic Seizures: A Review

open access: yesApplied Sciences, 2021
Despite extensive research, the exact pathomechanisms associated with epileptic seizure formation and propagation have not been elucidated completely. Two-photon imaging (2PI) is a fluorescence-based microscopy technique that, over the years, has been ...
Luqman Khan   +7 more
doaj   +1 more source

Classical reconstruction of interference patterns of position-wavevector-entangled photon pairs by time-reversal method [PDF]

open access: yes, 2017
The quantum interference of entangled photons forms a key phenomenon underlying various quantum-optical technologies. It is known that the quantum interference patterns of entangled photon pairs can be reconstructed classically by the time-reversal ...
Kobayashi, Hirokazu   +2 more
core   +2 more sources

Two-photon interference of multimode two-photon pairs with an unbalanced interferometer

open access: yes, 2003
Two-photon interference of multimode two-photon pairs produced by an optical parametric oscillator has been observed for the first time with an unbalanced interferometer. The time correlation between the multimode two photons has a multi-peaked structure.
Goto, Hayato   +4 more
core   +1 more source

Two-photon lensless endoscope

open access: yesOptics Express, 2013
We report a first demonstration of two-photon endoscopic imaging with a lensless endoscope. The endoscope probe is a double-clad bundle of single-mode fibers; point excitation and scanning is achieved by coherent combining of femtosecond light pulses propagating in the single-mode fibers; and back-scattered two-photon signal is collected through the ...
Andresen, Esben Ravn   +3 more
openaire   +2 more sources

Two-Photon Processes at Intermediate Energies [PDF]

open access: yes, 2001
Exclusive hadron production processes in photon-photon collisions provide important tests of QCD at the amplitude level, particularly as measures of hadron distribution amplitudes and skewed parton distributions.
Brodsky, S. J.
core   +4 more sources

A FRET Based Two-Photon Fluorescent Probe for Visualizing Mitochondrial Thiols of Living Cells and Tissues

open access: yesSensors, 2020
Glutathione (GSH) is the main component of the mitochondrial thiol pool and plays key roles in the biological processes. Many evidences have suggested that cysteine and homocysteine also exist in mitochondria and are interrelated with GSH in biological ...
Zhengkun Liu   +4 more
doaj   +1 more source

D* Production in Two-Photon Collisions [PDF]

open access: yes, 1999
We calculate total and differential production rates of D* mesons in two-photon collisions at LEP2. We include full next-to-leading order QCD corrections, and perform an extensive study of the sensitivity of our predictions to variations of the ...
Frixione, Stefano   +2 more
core   +2 more sources

Synaptic Loss in Alzheimer's Disease: Mechanistic Insights Provided by Two-Photon in vivo Imaging of Transgenic Mouse Models

open access: yesFrontiers in Cellular Neuroscience, 2020
Synapse loss is the strongest correlate for cognitive decline in Alzheimer's disease. The mechanisms underlying synapse loss have been extensively investigated using mouse models expressing genes with human familial Alzheimer's disease mutations. In this
Jaichandar Subramanian   +5 more
doaj   +1 more source

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