Results 231 to 240 of about 313,183 (286)

Targeting Post‐Irradiation Thyroid Dysfunction: Electrospun Scaffolds As A Dual‐Action Approach for Antioxidant and Immune Modulation

open access: yesAdvanced Healthcare Materials, EarlyView.
Radiation‐induced hypothyroidism follows head and neck radiotherapy due to oxidative stress and inflammation. Electrospun polycaprolactone scaffolds containing adenosine have potential to modulate thyroid repair. Scaffolds enhance thyrocyte proliferation, antioxidant enzymes glutathione peroxidase and catalase, reduce senescence and apoptosis markers ...
Maria Heim   +5 more
wiley   +1 more source

Lysosome‐Acidifying Nanoparticles Rescue A30P α‐Synuclein Induced Neuronal Death in Cellular and Drosophila Models of Parkinson's Disease

open access: yesAdvanced Healthcare Materials, EarlyView.
Lysosome‐targeted acidic nanoparticles based on a biodegradable poly(ethylene tetrafluorosuccinate‐co‐succinate) copolymer are engineered to restore impaired lysosomal acidification through pH‐responsive intracellular degradation. Localized acid release enhances autophagic proteolysis, reduces α‐synuclein accumulation, and preserves dopaminergic neuron
Chih Hung Lo   +6 more
wiley   +1 more source

Stimulated Emission Tomography

Physical Review Letters, 2013
We identify a relation between the number of photon pairs generated by parametric fluorescence, through either spontaneous parametric down-conversion (SPDC) or spontaneous four-wave mixing, and the number generated by the corresponding stimulated process, respectively, either difference-frequency generation or stimulated four-wave mixing.
LISCIDINI, MARCO, J. E. Sipe
openaire   +3 more sources

Cooling Atoms with Stimulated Emission

Physical Review Letters, 1986
We have observed an efficient collimation of a cesium atomic beam crossing at right angles an intense laser standing wave. This new cooling scheme is mainly based on a stimulated redistribution of photons between the two counterpropagating waves by the moving atoms. By contrast with usual radiation pressure cooling, this "stimulated molasses" works for
Aspect, A.   +4 more
openaire   +3 more sources

Stimulated Emission from Nuclei

Applied Optics, 1974
The feasibility of obtaining stimulated emission of both zero and finite mass particles from nuclei is considered, and the limitations imposed on the relevant nuclear parameters determined.
J, Byrne, G I, Peters, L, Allen
openaire   +2 more sources

Stimulated Emission Depletion Microscopy

Chemical Reviews, 2017
Despite its short history, diffraction-unlimited fluorescence microscopy techniques have already made a substantial imprint in the biological sciences. In this review, we describe how stimulated emission depletion (STED) imaging originally evolved, how it compares to other optical super-resolution imaging techniques, and what advantages it provides ...
Hans Blom, Jerker Widengren
openaire   +5 more sources

Stimulated emission

2012
AbstractStimulated emission is treated as a ‘special case of luminescence’ that requires population inversion of energy levels. After introductory examples of spontaneous emission spectra influenced by ingredient of stimulated emission, basic concept of spontaneous and stimulated emission (Einstein coefficients) in an atomic system is reviewed.
Ivan Pelant, Jan Valenta
openaire   +1 more source

Stimulated Emission Tomography

CLEO: 2014, 2014
We experimentally demonstrate the reconstruction of the polarization state of entangled photon pairs by stimulated emission tomography.
Liscidini, M.   +6 more
openaire   +2 more sources

Stimulated emission and black holes

Physical Review D, 1985
The probability of a black hole emitting m particles when n particles are incident on the black hole was first derived by Bekenstein and Meisels, and later, using a different method, by Panangaden and Wald. In another paper by Bekenstein, it was argued that black holes should have stimulated emission in all modes including the nonsuperradiant ones.
openaire   +2 more sources

Stimulated Emission of Polaritons

Journal of Applied Physics, 1972
The gain of optically pumped CdS lasers is calculated assuming that stimulated emission occurs with photonlike polaritons created in inelastic exciton-exciton collisions; it is shown that gain constants of the recently observed magnitude can be expected from this mechanism.
Herbert Mahr, C. L. Tang
openaire   +1 more source

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