Results 21 to 30 of about 4,288 (180)

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

Acta 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, Maíra Gonçalves da Mota LIMA, Filipe Tavares CARNEIRO, Nathalia Salgado ZANANI, Marcela Corrêa SCALON, Thamiris Figueiredo SILVA, Mariana Accioly LIMA, Maia Araújo ABRAHIM, Giane Regina PALUDO   +8 more
doaj   +2 more sources

Absolute salinity determination by oscillation-type densimetry and refractometry

International Journal of Metrology and Quality Engineering, 2022
The determination of salinity values from SI traceable densimetry and refractometry measurement results enable SI traceability of the former. In this work, a short study of the metrological compatibility of salinity determinations via these two methods ...
Furtado Andreia, Napoleão Andreia, Pereira Jorge, Moura Sara, Quendera Raquel, Pellegrino Olivier   +5 more
doaj   +1 more source

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

Sensors, 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, Isak Silander, Johan Zakrisson, Ove Axner, Martin Zelan   +4 more
doaj   +1 more source

Optical Window to Polarity of Electrolyte Solutions

Molecules, 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

Hybrid Microfluidic Platform for Multifactorial Analysis Based on Electrical Impedance, Refractometry, Optical Absorption and Fluorescence

Micromachines, 2016
This paper describes the development of a novel microfluidic platform for multifactorial analysis integrating four label-free detection methods: electrical impedance, refractometry, optical absorption and fluorescence.
Fábio M. Pereira, Iwona Bernacka-Wojcik, Rita S. Rodrigues Ribeiro, Maria Teresa Lobato, Elvira Fortunato, Rodrigo Martins, Rui Igreja, Pedro A. S. Jorge, Hugo Águas, Abel Martin Gonzalez Oliva   +9 more
doaj   +1 more source

Critical-Angle Differential Refractometry of Lossy Media: A Theoretical Study and Practical Design Issues

Instruments, 2019
At a critical angle of incidence, Fresnel reflectance at an interface between a fronttransparent and a rear lossy medium exhibits sensitive dependencies on the complex refractiveindex of the latter.
Spyridon Koutsoumpos, Panagiotis Giannios, Dimos Triantis, Konstantinos Moutzouris   +3 more
doaj   +1 more source

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

Компьютерная 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

Suppression of Air Refractive Index Variations in High-Resolution Interferometry

Sensors, 2011
The influence of the refractive index of air has proven to be a major problem on the road to improvement of the uncertainty in interferometric displacement measurements.
Zdeněk Buchta, Jan Hrabina, Martin Čížek, Ondřej Číp, Josef Lazar   +4 more
doaj   +1 more source

Toward Intelligent Multimodal Holography for Real‐Time Chemical Imaging of Dynamic Ion Separation

Advanced Intelligent Discovery, EarlyView.
Intelligent multimodal holography integrates digital off‐axis holography, spectroscopic imaging, and AI‐driven reconstruction to visualize ion transport and chemical dynamics in real time. In this perspective paper, we outline how this approach enables label‐free, chemically specific monitoring of complex environments and discuss its potential to ...
Giovanna Ricchiuti, Sarah I. Allec, Maxim Ziatdinov, Venkateshkumar Prabhakaran   +3 more
wiley   +1 more source

Validation of a stall‐side immunoglobulin assay for use in equine reproductive management

Equine Veterinary Journal, EarlyView.
Abstract Background Equine foals receive IgG from mare colostrum through passive transfer. Failure of passive transfer (FPT) is a significant risk to the foal's life, leaving them vulnerable to infection and sepsis. Radial Immunodiffusion (RID) and immunoturbidimetric assays quantify IgG present in a foal sample but require a laboratory to complete ...
L. Moore, A. McLain, S. H. McDowell, C. J. Ledgerwood, E. Bailie, M. A. Nesbit, T. Moore   +6 more
wiley   +1 more source