The influence of sodium dodecyl sulfate on the dissociation of protonated 8-hydroxyquinoline in aqueous solutions is investigated by potentiometric titration at 293 K. The constants of direct binding of 8-hydroxyquinoline with the monomers and micelles of sodium dodecyl sulfate are determined by...
Because of the ability of 8-hydroxyquinoline sulfate (8-HQS) to irreversibly bind metals from rubber stoppers, the stability of 8-HQS in tuberculin solutions was investigated. For the determination of 8-HQS, a simple and sensitive reversed-phase HPLC method with detection at 240 nm was developed...
Sodium salt of a water-soluble, anionic, and monomeric 1:2 complex of Au(I) with a dianion of thiosalicylic acid TSA 2 - (H 2 TSA = o-HS(C 6 H 4 )COOH) was first prepared and isolated as colorless needle crystals through a stoichiometric reaction of NaAuCl ...
The present work describes a method for the determination of methyl anthranilate (MA) in honey, and reports the results of a study carried out on 46 Citrus honey samples produced in different countries. The MA content was measured, and the compliance of the samples with the unifloral Citrus hone...
Plants respond to herbivore or pathogen attacks by activating specific defense programs that include the production of bioactive specialized metabolites to eliminate or deter the attackers. Volatiles play an important role in the interaction of a plant with its environment. Through transcript pr...
In this research, preparations of polymer microcapsule encapsulated methyl anthranilate (MA) as an essential oil model by both microsuspension conventional radical polymerization (ms CRP) and microsuspension iodine transfer polymerization (ms ITP) using methyl methacrylate (MMA) and ethylene gly...
The results of a comprehensive investigation of the photophysical properties of the sunscreen analogue, N-acetyl menthyl anthranilate (NAMA), in various solvent systems are reported. Luminescence studies reveal that this compound is fluorescent (Φ f =0.16+/-0.01) in toluene and has a so...
An anthocyanidin, pelargonidin (PG), loses its color with time in acidic media. The rate determining step of the discoloration reaction at pH 1–4 is the nucleophilic attack of the OH- ion on PG to give a hemiacetal, which readily isomerizes to the corresponding α-diketone. Native, branched, an...
Here, we are reporting a sensitive, simple and rapid method for the analysis of cyanidin chloride and pelargonidin chloride anthocyanins in cherry, sour cherry, pomegranate and barberry produced in Iran. The analytes were extracted with acetonitrile-hydrochloric acid (1% v/v) mixture under optim...
CuSO4·5H2O and NaAsc catalyzed hydroxylation and C–O/C–S cross-coupling reactions of aryl halides with phenols or 4-methylbenzenethiol were described. A wide range of substrates and test cases highlight the synthetic utility of the approach. A series of phenols, diaryl ethers, alkylaryl ether...
The objective of this research was to functionally characterize sodium-dependent vitamin C transporter (SVCT) in MDCK-MDR1 cells and to study the effect of substituted benzene derivatives on the intracellular accumulation of ascorbic acid (AA). Mechanism of AA uptake and transport was delineated...
The authors conducted a study to quantify the amount of hydrogen peroxide remaining after in-office bleaching and to investigate the effectiveness of 35 percent sodium ascorbate (SA) on removal of the bleaching agent from dentin. The authors sectioned 70 extracted human third molars to form 4...
Three-phase hollow fiber based liquid phase microextraction (HF-LPME) was developed for the preconcentration of kanamycin sulfate combined with electrochemiluminescence detection. The extractant was 1-octyl-methylmidazolium hexafluorophosphate ([OMIM]PF 6 ). A hollow fiber supported liqu...
The analysis of kanamycin sulfate by liquid chromatography using a column packed with poly(styrene-divinylbenzene) and pulsed electrochemical detection on a gold electrode is described. A two-step gradient was necessary to obtain a good separation together with a reasonable analysis time of maxi...
Capillary zone electrophoresis was successfully applied to separate eight related substances of kanamycin and several minor unknowns from the main component. Strategies to enhance derivatization and selectivity and to optimize separation parameters involved the application of experimental design...
Transthyretin (TTR) is a plasma homotetrameric protein associated with senile systemic amyloidosis and familial amyloidotic polyneuropathy. In theses cases, TTR dissociation and misfolding induces the formation of amyloidogenic intermediates that assemble into toxic oligomeric species and lead t...
Due to their extraordinary binding properties, serum albumins are the main transporters of many small molecules in the circulatory system. Although all mammalian serum albumins exhibit quite high sequence similarity, their binding abilities are not the same. Until now, only human serum albumin (...
The photocatalytic degradation of chloramben (3-amino-2,5-dichlorobenzoic acid) was investigated in aqueous solutions containing TiO 2 suspensions under irradiation with simulated solar light. The primary degradation of the herbicide, the mineralisation of the organic carbon to CO 2 ...
Since S-methylation is a major pathway in the metabolism of thiopurines, our data point to the possibility of a clinically significant diuretic-thiopurine interaction in patients treated simultaneously with these drugs.
A liquid chromatographic procedure was developed and validated for the quantitative determination of trichlormethiazide (TCMTZ) in bovine milk. Whole milk was defatted by initial centrifugation at 4°C. The resulting skim milk was treated with lead acetate and acetonitrile, vortex mixed, and cen...
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