Results 61 to 70 of about 590,337 (295)

Enhancement of the nonlinear optical absorption of the E7 liquid crystal at the nematic-isotropic transition

open access: yes, 2012
We present an experimental study of the nonlinear optical absorption of the eutectic mixture E7 at the nematic-isotropic phase transition by the Z-scan technique, under a continuos wave excitation at 532 nm. In the nematic region, the effective nonlinear
Bechtold, Ivan H.   +3 more
core   +1 more source

3D face recognition using multiview keypoint matching [PDF]

open access: yes, 2009
A novel algorithm for 3D face recognition based point cloud rotations, multiple projections, and voted keypoint matching is proposed and evaluated. The basic idea is to rotate each 3D point cloud representing an individual’s face around the x, y or z ...
Mayo, Michael, Zhang, Edmond Yiwen
core   +2 more sources

Structural biology of ferritin nanocages

open access: yesFEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

Pulse Shape Influence on the Accuracy of Z-scan Measurements

open access: yesNonlinear Analysis, 2005
Although the laser pulses with durations ranging from nanoseconds to femtoseconds and various pulse shapes are utilized for the Z-scan measurements, the influence of the temporal pulse shape on the measurement results is often neglected.
A. Dement’ev, A. Jovaiša
doaj   +1 more source

Comparative study of the linear and nonlinear optical properties for different Iraqi heavy and light crude oils

open access: yesIraqi Journal of Physics, 2020
Iraqi oil crudes have some of the physical and chemical characteristics that distinguish it from other types of oil crudes in the world. Some of these features such us molecular composition, rheological, viscosity and emulsions are studied carefully by ...
Aseel I. Mahmood   +2 more
doaj   +1 more source

Improving elevation resolution in phased-array inspections for NDT [PDF]

open access: yes, 2019
The Phased Array Ultrasonic Technique (PAUT) offers great advantages over the conventional ultrasound technique (UT), particularly because of beam focusing, beam steering and electronic scanning capabilities.
Brizuela, Jose David   +4 more
core   +1 more source

Transferrin receptor 1‐mediated iron uptake supports thermogenic activation in human cervical‐derived adipocytes

open access: yesFEBS Letters, EarlyView.
In this study, we found that human cervical‐derived adipocytes maintain intracellular iron level by regulating the expression of iron transport‐related proteins during adrenergic stimulation. Melanotransferrin is predicted to interact with transferrin receptor 1 based on in silico analysis.
Rahaf Alrifai   +9 more
wiley   +1 more source

Thermal lens investigation of DAZA polymer using dual beam z-scan technique

open access: yesResults in Optics
The thermal lens properties of DAZA polymer solution have been investigated using the dual beam thermal lens method in a mode-mismatched configuration.
M.D. Zidan   +4 more
doaj   +1 more source

Large nonlinear absorption in single aggregate of silver nanoparticles observed with z-scan imaging technique

open access: yesAIP Advances, 2021
Although nonlinear optical spectroscopy of nanostructures, nanomaterials, and nanomedicines has been widely used to observe and study the nature of nonlinear optical (NLO) phenomena, the field has to improve for the single nanostructure system.
Hendry Izaac Elim
doaj   +1 more source

Linear and Nonlinear Optical Properties of Mn doped Benzimidazole Thin Films

open access: yes, 2014
In the present work, the Mn doped benzimidazole (BMZ) thin films were prepared by simple chemical bath deposition technique. The material was directly deposited as thin film on glass substrates and the metal concentration in the solution was varied in ...
Babu, R. Ramesh   +3 more
core   +1 more source

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