115 samples of honey various botanical types, geographical origin and harvest year (2019– 2021) were analysed using attenuated total reflection infrared spectroscopy impaired reflection, refractometry biochemical analysis. Initial in liquid crystallised states investigated. Crystalline D-glucopyranose (glucose), D-fructopyranose (fructose), their 40% solutions invert sugar used as auxiliary sub...

The work is devoted to the study of physicochemical and surface-active properties N-(benzoyl)-N'-(phenylsulfonyl)hydrazine (BPSH) assess possibility using reagent in processes concentration non-ferrous metal ions. solubility ethanol, 0.1 mol/l KOH solution, toluene, chloroform, hexane was studied by spectrophotometry, refractometry, gravimetry. Acid-base equilibria solutions hydrolytic stabilit...

background: accumulation of pleural and peritoneal fluid is seen in some diseases. in order to diagnose the disease and start the treatment, one of the most important actions will be to differentiate between exudates and transudates. the objective of this study was to determine the diagnostic value of measuring the specific gravity of the fluid through refractometer and strip in differentiation...

The refractive index as well as molar refraction, is the true index of purity of substance and plays a vital role in solution chemistry. A small addition of a foreign substance either in solid state of liquid form is going to effect the refractive index.As such the variation of refractive indices in pure glucose solution as a function of concentration is studied in detail and this principle is ...

Digital holography has some desirable properties for refractometry of microscopic objects since it gives phase and amplitude information of an object in all depths of focus from one set of exposures. The refractive index of the object can be determined by observation of the movements of the Becke lines between different focus depths. It is also shown that one single phase image provides an inde...

Plasma and serum protein concentrations were determined in chickens and turkeys by refractometry (with human and veterinary refractometers) and by the biuret method. Chicken and turkey serum protein values were significantly lower than respective plasma protein values according to both methods. Refractometer readings for both plasma and serum correlated closely with the results of the biuret te...

We present a concept that enables the determination of complex refractive index attenuating media from two critical angles, measured sequentially at interfaces between single sample and different prisms. The proposed method is general in it applies with s p polarisation states, thus suited for characterisation isotropic as well anisotropic media. Uncertainty analysis indicates relative error re...