12-Hydroxystearic acid (12-HSA) is obtained via hydrogenation of castor oil resulting in complete saturation of the hydrocarbon chain. The first study addressing the thickening action of 12-HSA occurred in 1972 when it was added to peanut butter. In this study, low levels (0.5%–1.0%) of 12-HSA ...
Fatty acids (FA) bearing oxygenated functions and present in esterified form in triacylglycerols are widespread in nature but very little is known about their occurrence in dairy products. A method based on gas chromatography (with flame ionization detector and mass spectrometry detectors), incl...
Simple treatment of conjugated all E-dienal, (2E,4E)-hexa-2,4-dienal, in subcritical water afforded an intramolecular redox product, non-conjugated Z-enoic acid, (Z)-hex-3-enoic acid, in 42% yield without the usage of a metal catalyst in one-step under the conditions of 250 °C, 10 min, and 0.35...
Cholesteryl ester transfer protein (CETP) is a serum component responsible for both cholesteryl ester and triglyceride trafficking between high-density lipoprotein (HDL) and the apolipoprotein B (apoB)-containing very low-density lipoprotein (VLDL) and low-density lipoprotein (LDL). Several fluo...
The role of conformation and the effect of position of the substituent on the activity of copper(II) derivative of meso-5,10,15-tris(4- or 5- bromothien-2-yl)-20-(4-((thiophen-2-ylimino)methyl)benzoic acid)porphyrin (CuXB5TP, X = 4 or 5) as photosensitisers have been investigated. The higher pho...
Reaction of methyl 1-azulenecarboxylate (8) with terephthalaldehyde (9) in acetic acid in the presence of hydrochloric acid at 25 °C for 2 h gives 1,4-bis[bis(3-methoxycarbonyl-1-azulenyl)methyl]benzene (12), in 93% yield, which upon oxidation with 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ) ...
The inexpensive large scale preparation of N-methoxycarbonyl-7-aza-2,3-bis(phenylsulfonyl)bicyclo[2.2.1]hept-2-ene and the re-examination of its stereoselective desymmetrization are reported. Moreover, the kinetic resolution of N-protected 3-arylsulfonyl-7-aza-2-bromobicyclo[2.2.1]hepta-2,5-dien...
The synthesis of 3,4-bis[(methoxycarbonyl)methyl]thiophene and bis-, ter- and pentathiophenes, with alternating 3,4-bis(methoxycarbonyl)methyl-substituted rings, is reported. These new thiophene derivatives are possible precursors for the preparation of new conducting polymers useful as material...
Copolymers were prepared by the Suzuki reaction of 2,5-diheptylbenzene-1,4-bis(trimethylene boronate) with dibromobenzenes or dibromothiophene. From n.m.r. spectra, these copolymers turned out to be alternative copolymers of diheptylbenzene with benzenes or thiophene. The degree of polymerizatio...
[2.2](2,5)Pyridinophanes 1 – 4 consisting of two nicotinic ester units in the four different orientations possible were synthesized. Diquaternization to the corresponding pyridiniophanes 9 – 12 and partial reduction of 9 and 12 yielded the semi-reduced species 14 and 15; these isomers, due to ...
The selective determination of l-tyrosine (Tyr) in the presence of important interferents, ascorbic acid (AA) and uric acid (UA) at physiological pH in phosphate buffer solution was reported for the first time using the electropolymerized film of 3-amino-5-mercapto-1,2,4-triazole on glassy carbo...
This paper describes the electropolymerization of 3-amino-5-mercapto-1,2,4-triazole (AMTa) on glassy carbon electrode (GCE) and the electrocatalytic activity of the resulting polymer film towards uric acid (UA) at physiological pH. The electropolymerization of AMTa was performed by potentiodynam...
Three novel complexes, [NiII(dpp)2(L)2] (1), [NiII(eda)2(L)2] (2) and [NiII(deda)2(L)2] (3) (L = 3-pyridinyl-4-amino-5-mercapto-1,2,4-triazole, dpp = 1,3-diaminopropane, eda = ethanediamine, deda = N,N-dimethyl ethylenediamine), were synthesized by reacting 3-pyridinyl-4-amino-5-mercapto-1,2,4-t...
Electrochemical synthesis of o-benzoquinone derivatives and their in situ transformation are one of the versatile approaches for the synthesis of derivatized catechols. In the present work, electrochemical oxidation of catechols 1a–1d in the presence of a unique nucleophile, 4-amino-3-methyl-5-...
The molecular vibrations of 3-amino-5-mercapto-1,2,4-triazole (AMT) have been investigated in polycrystalline sample, at room temperature, by Fourier transform infrared (FT-IR) and FT-Raman spectroscopies. A detailed vibrational spectral analysis has been carried out and assignments of the funda...
A high performance liquid chromatography (HPLC) method using fluorescence detection to determine 3-amino-5-mercapto-1,2,4-triazole (AMT) levels in serum has been developed. Sample preparation involved treatment with tributylphosphine (TBP) to reduce disulfides formed during storage, precipitatio...
A promising electrochemical sensor was developed through electrodepositing copper nanoparticles (CuNPs) on overoxidized poly(3-amino-5-mercapto-1,2,4-triazole) (p-TAOX) film modified glassy carbon electrode (GCE). The composite electrode exhibits excellent selectivity and sensitivity towards asc...
The self-assembled monolayer (SAM) of 3-amino-5-mercapto-1,2,4-triazole (AMTa) was formed on a copper surface and characterized using cyclic voltammetry, Fourier Transform Infra-red spectroscopy and scanning electron microscopy. Quantum chemical calculations suggested the stronger interaction be...
This article reports formulation of remarkably stable macromolecule capped silver nanoparticles for the instant naked eye assay of extremely hazardous environmental pollutant, picric acid. We have established a simple and sensitive colorimetric technique for the assay of picric acid using spheri...
A novel adsorbent was synthesized via modifying silica nanoparticles with 3-Amino-5-mercapto-1,2,4-triazole and was used to selectively adsorb silver ions from aqueous solutions. The adsorbent was confirmed by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, transmissio...
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