Results 21 to 30 of about 10,250 (215)

The Short-Term Performances of Two Independent Gas Modulated Refractometers for Pressure Assessments

open access: yesSensors, 2021
Refractometry is a powerful technique for pressure assessments that, due to the recent redefinition of the SI system, also offers a new route to realizing the SI unit of pressure, the Pascal. Gas modulation refractometry (GAMOR) is a methodology that has
Clayton Forssén   +4 more
doaj   +1 more source

An optical fiber hydrogen sensor using a palladium-coated ball lens [PDF]

open access: yes, 2015
A self-referenced optical fiber refractometer using a ball lens as a sensor head has been developed and characterized. A 350-μm ball lens created at the tip of a single mode fiber has been coated with a 40-nm optically thin layer of palladium that reacts
Brooks, Simon J.   +7 more
core   +1 more source

Optical Window to Polarity of Electrolyte Solutions

open access: yesMolecules, 2023
Medium polarity plays a crucial role in charge-transfer processes and electrochemistry. The added supporting electrolyte in electrochemical setups, essential for attaining the needed electrical conductivity, sets challenges for estimating medium polarity.
Omar O’Mari, Valentine I. Vullev
doaj   +1 more source

Liquid-infiltrated photonic crystals: Ohmic dissipation and broadening of modes [PDF]

open access: yes, 2006
The pronounced light-matter interactions in photonic crystals make them interesting as opto-fludic "building blocks" for lab-on-a-chip applications.
Adams   +18 more
core   +2 more sources

Refractive Index Compensation in Over-Determined Interferometric Systems

open access: yesSensors, 2012
We present an interferometric technique based on a differential interferometry setup for measurement under atmospheric conditions. The key limiting factor in any interferometric dimensional measurement are fluctuations of the refractive index of air ...
Zdeněk Buchta   +5 more
doaj   +1 more source

Plasmonic Sensors Based on Doubly-Deposited Tapered Optical Fibers

open access: yesSensors, 2014
A review of the surface plasmon resonance (SPR) transducers based on tapered fibers that have been developed in the last years is presented. The devices have proved their good performance (specifically, in terms of sensitivity) and their versatility and ...
Agustín González-Cano   +3 more
doaj   +1 more source

Refractometry as an alternative to the biuret method for measuring total serum proteins in Podocnemis expansa (Podocnemididae) and Phrynops geoffroanus (Chelidae) [PDF]

open access: yesActa Amazonica, 2017
Total serum protein is a significant indicator of health condition in animals. The aim of this study was to analyze the precision of the portable refractometer in determining the concentration of total serum proteins in Podocnemis expansa and Phrynops ...
Lourdes Marina Bezerra PESSOA   +8 more
doaj   +2 more sources

Modified prism methods for measuring the refractive index of solid and liquid substances

open access: yesКомпьютерная оптика, 2023
Methods for measuring the refractive index of optically transparent dielectric materials are considered. Modified methods based on the methods of minimum deviation and constant deviation are proposed and allow determining the refractive index of ...
A.I. Yurin, G.N. Vishnyakov, V.L. Minaev
doaj   +1 more source

Inmunidad pasiva en el control de la diarrea por coronavirus bovino en un rodeo lechero de Argentina [PDF]

open access: yes, 2018
El coronavirus bovino (Bovine coronavirus, BCoV) es un enteropatógeno viral asociado a la diarrea neonatal del ternero. El objetivo del presente trabajo fue estudiar si los anticuerpos IgG1 anti-BCoV adquiridos pasivamente mediante el calostro modulan la
Allassia, Martín   +5 more
core   +2 more sources

Comparison of rapid laboratory tests for failure of passive transfer in the bovine [PDF]

open access: yes, 2015
peer-reviewedBackground Failure of passive transfer of maternal immunity via colostrum can occur in the bovine, and a number of blood tests have been developed to test calves for this failure. It is not clear which test is most suitable for this purpose.
Brady, Paula   +7 more
core   +1 more source

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