Results 241 to 250 of about 6,203,659 (303)

Analysis of phase shift between pulse oscillations of macro- and microvascular cerebral blood flow in patients with traumatic brain injury. [PDF]

Acta Neurochir (Wien)
Kasprowicz M, Hendler M, Ziółkowski A, Nasr N, Czosnyka M.   +4 more
europepmc   +1 more source

Comparative assessment of crystallographic and cryo‐EM models in the Protein Data Bank

FEBS Open Bio, EarlyView.
Raw data obtained by X‐ray crystallography or cryo‐EM result in experimental maps, ultimately fitted by atomic models. Although the physical principles are different, the final results can be viewed, compared, and evaluated in the same way. With cryogenic electron microscopy (cryo‐EM) on track to surpass X‐ray crystallography as the preferred method ...
Alexander Wlodawer, Pawel Rubach, Zbigniew Dauter, Wojciech Dec, Dariusz Brzezinski, Marta Kulik, Wladek Minor, Mariusz Jaskolski   +7 more
wiley   +1 more source

Exploratory investigation of virtual lesions in gastrointestinal endoscopy using a novel phase-shift method for three-dimensional shape measurement. [PDF]

DEN Open
Sakamoto T, Oda I, Okamura T, Cho H, Toyoshima N, Nonaka S, Suzuki H, Nakamura T, Watanabe D, Matsuo K, Hanano K, Takeyama T, Yoshinaga S, Saito Y.   +13 more
europepmc   +1 more source

Structural and biochemical insights into the thermostable esterase Ta0887 from Thermoplasma acidophilum

FEBS Open Bio, EarlyView.
In this study, a novel esterase from the thermoacidophilic archaeon Thermoplasma acidophilum was biochemically and structurally characterized. Our results demonstrate that Ta0887 is a highly thermostable esterase that preferentially hydrolyzes p‐nitrophenyl hexanoate and possesses an α‐helical cap domain that likely contributes to its substrate ...
Alejandro Delgado‐Rey, Miriam Livier Llamas‐García, Gabriela M. Montero‐Morán, Leticia Santos, Samuel Lara‐González   +4 more
wiley   +1 more source

Assessing the oxygen scavenging capacity and myocardial gas embolization risk of ultrasonically activated phase shift perfluorobutane droplets.

J Mater Chem B
Al Rifai N, Stone K, Bo B, Zhang B, Kasiviswanathan D, Redington AN, Haworth KJ.   +6 more
europepmc   +1 more source

Novel Thermoreversible Reverse-Phase-Shift Foam With Deployment System for Treatment of Penetrating Globe Trauma in a Newly Described Porcine Model. [PDF]

Mil Med
Donaldson RI, Chou E, Tanen DA, Armstrong JK, Buchanan OJ, Graham TL, Cristerna NN, Cambridge JS, Goldenberg D, Tolles J, Ross JD.   +10 more
europepmc   +1 more source

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Phase-shifting interferometry with uncalibrated phase shifts

Applied Optics, 2000
A computationally efficient algorithm for phase-shifting interferometry with imprecise phase shifts is developed. It permits the use of an uncalibrated phase shifter and is also insensitive to spatial intensity variations. The measurement has both spatial and temporal aspects. Comparisons are made between pixels within the same interferogram, and these
X, Chen, M, Gramaglia, J A, Yeazell
openaire   +2 more sources

Phase-shift calibration algorithm for phase-shifting interferometry

Journal of the Optical Society of America A, 2000
We propose a novel phase-shift calibration algorithm. With this technique we determine the unknown phase shift between two interferograms by examining the sums and differences of the intensities on each interferogram at the same spatial location, i.e., I1(x, y) +/- I2(x, y). These intensities are normalized so that they become sinusoidal in form.
X, Chen, M, Gramaglia, J A, Yeazell
openaire   +2 more sources

Phase-shift extraction for generalized phase-shifting interferometry

Optics Letters, 2009
A simple algorithm for blind extraction of phase shifts is proposed for generalized phase-shifting interferometry from only three interferograms. Based on the statistical property of the object wave, the algorithm calculates approximately the involved phase shifts as initial values. The extraction is further improved by an iterative method, considering
Gao, Peng, Yao, Baoli, Lindlein, Norbert, Mantel, Klaus, Harder, Irina, Geist, Eduard   +5 more
openaire   +2 more sources

Blind phase shift estimation in phase-shifting interferometry

Journal of the Optical Society of America A, 2007
A blind phase shift estimation algorithm that allows simultaneous calculation of phases and phase shifts from three or more interferograms is presented. In phase-shifting interferometry, the phase shift errors introduce specific correlations between the calculated background intensity distribution and the fringe component.
Hongwei, Guo, Yingjie, Yu, Mingyi, Chen
openaire   +2 more sources