Silver nanoparticles were synthesized in linear and branched polyelectrolyte matrices using different reductants and distinct synthesis conditions. The effect of the host hydrolyzed linear polyacrylamide and star-like copolymers dextran-graft-polyacrylamide of various compactness, the nature of the reductant, and temperature were studied on in situ synthesis of silver sols. The related nanosyst...

Starting from the varied chemical composition of Silene species (Caryophyllaceae family), the pharmacological utilizations (homeopathy) and the cumulative toxicity for a long time administration, were performed researches concerning the preparation and characterization of tinctures from aerial parts of S. alba and S. pendula species. Tinctures were obtained, according to the Romanian Pharmacopo...

Silica nanoparticle supported imidazolium ionic liquid [SNImIL] was synthesized and utilized as a biocompatible additive for studying the thermal reversibility of human carbonic anhydrase II (HCA II). For this purpose, we prepared additive by modification of nanoparticles through the grafting of ionic liquids on the surface of nanoparticles (SNImIL). The SNImIL were fully characterized by Fouri...

Wheat phenolic compounds have benefits of maintaining health and reducing risks some chronic diseases cancers. breeders producers are becoming interested in producing specialty wheat with a higher amount bioactive phenolics, addition to the conventional targets yield, disease pest resistance, milling baking quality, etc. Generally, total content (TPC) is determined using Folin-Ciocalteu reagent...

A fast and low-cost analytical method to determine the concentrations of carotenoids (β-carotene, lutein, lycopene) from mixed standard solutions or fruit extracts (kiwi fruits, tomato paste, pink grapefruit juice, kiwi-pineapple smoothie, apricot nectar) was tested. The methodology based on UV-Vis spectrophotometry Multivariate Curve Resolution-Alternating Least Squares (MCR-ALS). Results show...

In this research, a Dispersive Liquid-Liquid MicroExtraction (DLLME) method coupled to UV-vis spectrophotometry was developed for the indirect determination of silver ion. The method is based on the catalytic effect of the silver ion on the oxidation of congo red by potassium peroxodisulphate and extraction with DLLME procedure using chloroform (extraction solvent) containing cetyltrimethyl...

Moringa leaves are part of the moringa plants that contain nutrients. The chemical compounds in very much, one them is beta carotene. Beta carotene a potential source vitamin A and has highest activity all carotenoids. purpose this study was to determine content fresh dry using UV-Vis spectrophotometry method. population leaves, sample leaves. Method analysis research conducted by descriptive r...

A micell-mediated phase separation method for preconcentration of ultra-trace quantities of mercury as a prior step to its determination by UV-Vis spectrophotometry has been developed. The method is based on Hg(II)-dithizone complex formation in alkaline aqueous solution, and extraction of this Hg(II)-dithizone secondary complex into the surfactant-rich phase of the non-ionic surfactant oct...

In this work, we performed laser annealing of thin Sb2Te3 films to optimize crystallization time and their nonlinear optical properties. The annealed layers were studied by electron microscopy UV–Vis spectrophotometry. Their response was investigated transmission Z-scan measurements. These studies a femtosecond system providing 400 fs pulses at 1030 nm. results compared with previous findings b...