Results 91 to 100 of about 10,250 (215)

Method for Assessing the Fidelity of Optical Diffraction Tomography Reconstruction Methods

open access: yes, 2019
We use a spatial light modulator in a diffraction tomographic system to assess the accuracy of different refractive index reconstruction algorithms. Optical phase conjugation principles through complex media, allows us to quantify the error for different
Ayoub, Ahmed B.   +4 more
core   +1 more source

Optical diffraction tomography using a digital micromirror device for stable measurements of 4-D refractive index tomography of cells

open access: yes, 2016
Optical diffraction tomography (ODT) is an interferometric microscopy technique capable of measuring 3-D refractive index (RI) distribution of transparent samples.
Hong, Kihyun   +6 more
core   +1 more source

FABRICATION OF TISSUE-SIMULATIVE PHANTOMS AND CAPILLARIES AND THEIR INVESTIGATION BY OPTICAL COHERENCE TOMOGRAPHY TECHNIQUES [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2013
Methods of tissue-simulative phantoms and capillaries fabrication from PVC-plastisol and silicone for application as test-objects in optical coherence tomography (OCT) and skin and capillary emulation are considered.
A. V. Bykov   +6 more
doaj  

Changes of ultrasound characteristics of mango juice during fruit ripening [PDF]

open access: yes, 2012
Attenuation and propagation velocity of ultrasound signals at 25 MHz were measured on clear mango juice samples using a pulse echo method. Ultrasound characteristics were determined with other physico-chemical characteristics on juice samples extracted ...
Laux, Didier   +2 more
core  

Laser produced plasma refractometry

open access: yesLaser and Particle Beams, 1990
A method of probing beam refraction is suggested for the investigation of laserproduced plasma with high density gradients. The refraction angle α of a probing ray as a function of ray impact parameter p is used as input data. Different experimental realizations of α(p) measurements are considered.
Yu. A. Zakharenkov   +4 more
openaire   +1 more source

Clinical performance evaluation of total protein measurement by digital refractometry and characterization of non-protein solute interferences

open access: yesPractical Laboratory Medicine, 2016
Objectives: Refractometric methods to measure total protein (TP) in serum and plasma specimens have been replaced by automated biuret methods in virtually all routine clinical testing.
Joshua J.H. Hunsaker   +3 more
doaj   +1 more source

Calibrating evanescent-wave penetration depths for biological TIRF microscopy

open access: yes, 2019
Roughly half of a cells proteins are located at or near the plasma membrane. In this restricted space the cell senses its environment, signals to its neighbors and ex-changes cargo through exo- and endocytotic mechanisms.
Becherer, Ute   +4 more
core   +1 more source

The Refractive Index of Human Milk Serum: Natural Variations and Dependency on Macronutrient Concentrations

open access: yesFoods
The refractive index (RI) of human milk serum (also known as whey, milk soluble fraction or milk plasma) depends on the individual molecular species dissolved in the serum and their concentrations.
Johanna R. de Wolf   +4 more
doaj   +1 more source

Studies of Heavily Ionizing Particles and Space Biology Semiannual Report [PDF]

open access: yes
Radiobiological and radiation medical studies on biological ...
Lawrence, J. H., Neville, T.
core   +1 more source

Use of clinic refractometer at farm as a tool to estimate the IgG content in goat colostrum

open access: yesJournal of Applied Animal Research, 2018
Refractometry has been proposed as a farm technique to estimate the IgG concentration in colostrum. In order to validate the method in goat colostrum using a clinical refractometer, 216 colostrum and milk samples were obtained from 54 dairy goats ...
Noemí Castro   +3 more
doaj   +1 more source

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