Amorphous calcium phosphate (ACP) was synthesised in aqueous solution at room temperature using cyclodextrins. Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX) and thermal analysis (DTA/TGA...
Since their initial formulation in the 1980s, calcium phosphate cements (CPCs) have been increasingly used as bone substitutes. This article provides an overview on the chemistry, kinetics of setting and handling properties (setting time, cohesion and injectability) of CPCs for bone substitution...
Soil co-contamination of potentially toxic elements (PTEs) and phthalate esters has become prominent due to its potential adverse effect on human food supply. There is limited information on using wood- and animal-derived biochars for the remediation of co-contaminated soils. Therefore, a pot ex...
Some aspects of the toxicity of the anionic surfactant sodium 2-ethylhexyl sulfate (Tergitol® anionic 082) were determined in rats, mice, rabbits, and dogs. The most toxic commercial samples found during 12 years had rat LD50 values of 5.61 ml/kg orally, 4.73 ml/kg sc, and 0.32 ml/kg ip. In the ...
We have developed a quantum dot aptasensor (QD-aptasensor) and its accompanying portable analyzer for the detection of di-2-ethylhexyl phthalate (DEHP). This sensor is based on a newly screened aptamer (60-mer) via SELEX and shows a binding affinity of 213 nmol/L with DEHP. The 60-mer aptamer to...
A study of the reaction mechanism and thermodynamic modeling of pentavalent vanadium V(V) extraction from NaVO3-H2SO4-H2O solutions using Di-(2-ethylhexyl) phosphoric acid (D2EHPA or HA) extractant was carried out. The effects of initial pH of the solution, extractant concentration, and temperat...
Di(2-ethylhexyl) phthalate (DEHP) and di(n-butyl) phthalate (DBP) are the major phthalic acid esters to be used during the plastic manufacturing process; they have emerged as pollutants that result in serious environmental problems. However, their impacts on wheat at the reproductive stage remai...
Interactions between mixed anionic surfactants: Sodium dodecyl sulfate (SDS) and Sodium bis-(2-ethylhexyl) sulfosuccinate (AOT) and papain were investigated over the entire mole fraction range of SDS i.e. αSDS. The UV–visible and fluorescence behavior revealed the binding of papain to mixed su...
As judged by alkaline elution, exposure of Walker cells to either 3-amino-1,2,4-benzotriazine-1, 4-dioxide (SR 4233) or nitromin results in a dose-dependent increase in DNA damage due to single-strand breaks. With nitromin or SR 4233 there was little difference in the extent of DNA single-strand...
The experimental results show that the decompositions of 2,2-dimethoxypropane (DMP) and 2,2-diethoxypropane (DEP) have nearly identical rate ratio of 2-methoxypropene (MPP) and 2-ethoxypropene (EPP) in ionic liquids. The yields ratio of MPP/methanol and EPP/ethanol were nearly 1.0. The four-cent...
A thermal-stable and salt-tolerant biobased zwitterionic surfactant N, N-Dimethyl-N-[2-hydroxy-3-sulfo-propyl]-N′-phenyloctadecanoyl-1, 3-diaminopropane (SPODP) was successfully obtained from modification of oleic acids which can be regenerated from waste cooking oils, and its structure was cha...
Non-catalytic solvent-free assembling of aldehydes, dimedone and malononitrile at ambient temperature affords substituted 5,6,7,8-tetrahydro-4H-chromenes in 88–98% yields.
A series of 6-aryl-5-(1-cyclohexen-1-yl)pyrrolo[2,3-d]pyrimidines 9a–q were obtained by the three-component reaction between 6-aminopyrimidines 6, 7, 8, dimedone 2, and arylglyoxal 5a,b. The unexpected cyclization process was established by NMR and X-ray diffraction measurements.
Ionization of the well-known 2:1 dimedone–aldehyde adducts in polar solvents leads to the respective monoanions involving the intramolecular ionic hydrogen bond. These anions feature the short O···Ha···O distance (2.403 Å for 4, Rp-ClC6H4) and the strong downfield shift of the correspondi...
A novel fluorescent probe, 2, 4-cyclohexanedione-1-propyl-pyrene (TAR), has been synthesized to research thioredoxin (Trx) disulfenylation and visualize the activity of Trx in cells. The turn-on fluorescence change was induced by combining the vicinal dithiol proteins with the spatially sensitiv...
The study was designed with an aim to synthesize a series of 2-(((2-ether)amino)methylene)-dimedone derivatives and evaluate the synthesized compounds for antimicrobial activity. Compound library was synthesized by reaction with alkyl, alkenyl, alkynyl and alicyclic bromo-compounds. Characteriza...
Diethylamine catalyzed tandem Knoevenagel–Michael reactions have been carried out in aqueous medium as an efficient, greener and cost effective process for the simple one-pot synthesis of bis-dimedone derivatives. Reaction of substituted aromatic aldehyde (1 equiv.) and dimedone (2 equiv.), in ...
A highly enantioselective Michael/cyclization tandem reaction between dimedone and isatylidene malononitriles has been developed. With 5 mol% of bifunctional organocatalyst C15, chiral spiro[2-amino-4H-pyran-oxindole] derivatives were obtained in excellent yields (97–99%) with excellent enantio...
A new series of the complexes has been prepared by template condensation reaction of dimedone and carbohydrazide in the methanolic medium forming the complexes of the type [M(TML)X]X2; where TML is a tetradentate macrocyclic ligand; M = Cr(III), Fe(III); X = Cl−, NO3-, CH3COO−. The complexes hav...
In stressed plants, the reactive oxygen species (ROS) levels rise. Key to ROS signaling research are detection and identification of the protein cysteine sulfenylation (-SOH), the ROS-mediated oxidative product of a thiol (-SH). Arabidopsis thaliana seedlings were stressed with hydrogen peroxide...
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