Commercially available pesticides were examined as Mus musculus and Homo sapiens acetylcholinesterase (mAChE hAChE) inhibitors by means of ligand-based (LB) structure-based (SB) in silico approaches. Initially, the crystal structures simazine, monocrotophos, dimethoate, acetamiprid reproduced using various force fields. Subsequently, LB alignment rules assessed applied to determine inter synaptic conformations atrazine, propazine, carbofuran, carbaryl, tebufenozide, imidacloprid, diuron,...

Abstract The misuse of psychoactive substances is attracting a great deal attention from the general public. An increase use observed among young people who do not have enough awareness harmful effects these substances. Easy access to illicit drugs at low cost and lack effective means routine screening for new (NPS) contributed rapid in their use. New research evidence suggest that drug can cause variety adverse psychological physiological on human health (anxiety, panic, paranoia,...

The aim of this study is to evaluate the content phenolics: total phenols (TP), flavonoids (TF), anthocyanins (TA), as well antioxidant capacity (TAC) in three sour cherry cultivars (Prunus cerasus L.) introduced southeast Serbia climate conditions. Among researched cherries, ?Oblacinska? cultivar contained highest amounts all groups phenolics, followed by ?Cigancica? > ?Marela?. A significant difference were observed phenolic among different and growing seasons (p<0.05), compounds...

The content of phenolics: total phenols (TP), flavonoids (TF), anthocyanins (TA) and hydroxicinnamic acid as well the antioxidant capacity (TAC) in nine commercial red fruit juices (sour cherry, black currant, grape) produced Serbia were evaluated. compounds was measured by spectrophotometric methods, TAC determined using DPPH assays, individual hydroxycinnamic acids HPLC-DAD methods. Among examined juices, currant contained highest amounts all groups phenolics exhibited strong capacity....

The aim of this research was the determination heavy metals' (iron, copper, zinc, manganese, cadmium, nickel and lead) contents white, red black mulberry fruit grown in southeast region Serbia, their extracts. content all metals confirmed fruits. All tree types contained highest iron lowest Cd. level assayed fruits species ranged between 23.06-57.38 mg?100g?1. concentration range cadmium for tested found to be from 1.77 2.46 μg?100g?1 Morus nigra L. alba L., respectively. white decreases...

The storage stability of catechins, procyanidins, and total flavonoids in dark chocolate was investigated. obtained results showed that the degradation followed first-order reaction kinetics. Temperature-dependent modelled on Arrhenius equation. activation energy for during 61.2 kJ/mol. During storage, degraded more rapidly at 35°C (k = 7.8 × 10<sup>–3</sup>/day) than 22°C 5.4 4°C 2.2 10<sup>–3</sup>/day).

The objective of the present study was to investigate correlation between radical-scavenging properties (measured by evaluating quenching stable 2,2-diphenyl-1-picrylhydrazil radical) Serbian, Macedonian and Montenegran red wine Vranac different geographical origins, their contents total phenolics, flavonoids polyphenol profile. All tested wines samples showed a high antioxidant activity ranging from 13.00 15.02 mmol/L, while polyphenolic content 3478.70 3935.19 mg/L. predominant anthocyanin...

Abstract A high sensitive, accurate and simple kinetic method has been developed for determination of trace Co(II) ions, based on its strongly catalytic effect in the reaction oxidation disodium-6-hydroxy-5-[(4-sulfophenyl)azo]-2-naphtalenesulfonic acid (artificial color, Sunset Yellow FCF, E110 text selected as SY) by hydrogen peroxide borate buffer at pH 9.5, monitoring rate disappearance SY. Reaction was monitored spectrophotometrically, λmax SY 478.4 nm. The optimum operating conditions...

Abstract Synthesis and photoluminescence are reported of two phosphors whose basis lattice is MgBr 2 · 6H O. In the first case Mn 2+ ions as impurity introduced in this second Zn ions. For both it shown that absorption‐emission center a manganese ion. ion located octahedral coordination, reaching state through an isomorphic substitution Mg case, depending on relative concentration comparison to ions, may exist octahedral, tetrahedral, quasi‐tetrahedral causing appearance three emission bands...

Evaluation of an ICP-AES method that considers plasma robustness and matrix effects for the determination metals in berry fruits.

The present work describes a rapid and sensitive method for the determination of ultra micro amounts tungsten (VI) based on its inhibitory effect oxidation 4-hidroxycoumarine by potassium permanganate in presence hydrochloric acid. sensitivity is 20 ng/cm3. probable relative error -4.8-13 % W(VI) concentration range 250 to ng/cm3, respectively. Kinetic equations investigated process which determine order reactions regarding each reaction parameter under certain experimental conditions were...

Abstract A new kinetic method for determination of traces manganese(II) based on its catalytic effect the oxidation 4‐hydroxycoumarine with KMnO4 at pH=1.35 and a temperature 25°C was proposed. The reaction followed spectrophotometrically by measuring decrease in absorbance dye 525 nm. calibration graph is linear range 20–200 ng/cm3. effects certain foreign ions upon rate were determined assessment selectivity method. proposed has been applied river water samples satisfactory results....

In this work, synthesized 12-tungstenphosphoric acid (H3PW12O40 ? nH2O; PWA) was further ionically exchanged with Fe3+ ions, which led to the formation of 12- tungstophosporic iron salt, (FePW12O40 Fe-PWA). Fe-PWA then subjected thermal analysis (TGA/DTA), determining phase transition temperature 576?C from its corresponding phosphate tungsten bronze doped iron, Fe-PWB. Using X-ray powder diffraction (XRPD), Fourier-transform infrared spectroscopy (FTIR), and Scanning electron microscopy an...

The contents of 17 elements in thirteen strawberry cultivars grown the five districts Southern Serbia were determined using inductively coupled plasma optical emission spectrometry (ICP-OES). most abundant are K (875–1148 mg · kg−1 fresh weight), P (307–664 Ca (192–256 and Mg (111–189 weight) all samples. Strawberries also found to be a good source Sr (8.05–18.6 Fe (3.09–10.4 weight). As Cd below detection limit (0.0828 0.0205 kg−1, respectively) samples, while Ni, Cr, Cu recommended...

The analytical method based on a ligand-exchange reaction is proposed for the determination of salicylic acid (SA) in wines. was followed spectrophotometrically by monitoring rate appearance manganese(II)- salicylate complex alkaline medium at 370 nm. initial-rate adopted constructing calibration curve, which found to be linear over concentration range 0.69-4.14 μg mL-1. optimized conditions yielded theoretical detection limit 0.11 mL-1 3-3S0 crite­rion and quantification 0.33 10S0...