A new and facile procedure was developed to synthesize novel 5-O-(6′-O-modified)-desosamine 14-membered ketolides by adopting different protective strategies and comparing various glycosylation conditions. Two trichloroacetimidate donors, with Lev or Ac substituent groups at the C-6 position, w...

pH- and thermo-sensitive (1 → 4)-2-amino-2-deoxy-β-d-glucan (i.e. chitosan) graft copolymer was prepared by reversible addition fragmentation chain transfer polymerizations of N-isopropylacrylamide with 4-methylbenzenesulfonic acid (i.e. tosylic acid)-chitosan complex. The polymerization was c...

The aim of this research was to develop a TiO2 composite from a waste material in order to study the photocatalytic decomposition of an important residual anthraquinonic dye. Carbon-TiO2 composites were obtained from carbonized avocado kernels and sols of TiO2 prepared from NH4OH and TiCl4 using...

A facile procedure was developed to synthesize novel N-glycoside josamycin derivatives by coupling 4′-amino-desmycarosyl josamycin derivatives with l-mycarose. A novel N-glycoside josamycin derivative 10a and a key intermediate 9a were designed and synthesized. And two rearranged compounds 9b a...

A Brønsted-acid catalyzed tandem annulation reaction of o-ethynylanilines, aldehydes and nitriles was reported, affording functionalized tricyclic pyranoquinoline derivatives with excellent functional groups tolerance. 4-Quinolone derivatives could be generated in the reaction of o-ethynylanilin...

The title material was grown by slow evaporation solution growth technique using methanol as solvent. Single crystal X-ray diffraction study revealed that the material belongs to triclinic crystal system with space group P1¯. Powder XRD measurements was explored to identify strain present in th...

The solubility of 2-chloro-5-nitrotoluene-4-sulfonic acid (CNT acid) and 2-amino-5-chloro-4-methylbenzenesulfonic acid (CLT acid) in aqueous sulfuric acid solutions was measured over the temperatures range from 276.91 to 345.42 K at atmospheric pressure by a dynamic method. The solubility of CNT...

Polybrominated dibenzo-p-dioxins (PBDDs) and hydroxylated polybrominated diphenyl ethers (OH-PBDEs) can be formed from bromophenols (BPs) by thermal degradation, biosynthesis or phototransformation. However, it is unknown whether PBDDs and OH-PBDEs can be formed during the chemical production pr...

2,4,6-Tribromophenol (TBP), an intermediate of brominated flame retardants, can easily release to environment and recalcitrant to degradation. Previously, Bacillus sp. GZT, a pure aerobic strain capable of simultaneously debrominating and mineralizing TBP, was successfully isolated by us. To fur...

Legacy environmental contaminants such as polybrominated diphenyl ethers (PBDEs) are widely detected in human tissues. However, few studies have measured PBDEs in placental tissues, and there are no reported measurements of 2,4,6-tribromophenol (2,4,6-TBP) in placental tissues. Measurements of t...

Anaerobic mineralization of 2,4,6-tribromophenol (2,4,6-TBP) was achieved by a synthetic anaerobe community comprising a highly enriched culture of Dehalobacter sp. phylotype FTH1 acting as a reductive debrominator; Clostridium sp. strain Ma13 acting as a hydrogen supplier via glucose fermentati...

This study investigated contamination trends and factors affecting the levels of brominated flame retardants (BFRs), including hexabromocyclododecane (HBCD) diastereomers, tetrabromobisphenol A (TBBP-A), and 2,4,6-tribromophenol (2,4,6-TBP), in breast milk in Japan. Breast milk samples (n = 64) ...

This study investigates the photoassisted processes, namely direct photolysis (DP), heterogeneous photocatalysis (HP) and photoelectrolysis (PEC), in 2,4,6-Tribromophenol (TBP) abatement, mineralization and debromination. Electric energy per order (EEO), degradation kinetic (k′), half-life time...

2,4,6-Tribromophenol is the most widely produced brominated phenol. In the present review, we summarize studies dealing with this substance from an environmental point of view. We cover concentrations in the abiotic and biotic environment including humans, toxicokinetics as well as toxicodynamic...

The study investigates the degradation of 2,4,6-tribromophenol (2,4,6-TBP) and the influence of solution pH, alkalinity, H2O2 and O3 dosage. Debromination efficiency of 2,4,6-TBP was the highest in basic water (pH = 10.61). The extent of TOC removal compared favourably with the amount of substra...

The environmental detriment due to the presence of emerging contaminants has encouraged the development of advanced oxidation processes. Such methods deal with non-selective chemical reactions. Therefore, toxic byproducts can be generated and distinct post treatment toxicity levels can be expect...

Catalytic ozonation of 2,4,6-Tribromophenol (2,4,6-TBP) in aqueous media conducted in the presence of 10%, 20% and 30% Co loaded on Fe by co-precipitation (Co-ppt) and a simple physical mixing method (Mixed), is compared to ozonation alone. In ozonation alone, only 40% of 2,4,6-TBP was converted...

Biocidal polymers were prepared by reacting uramil with polyacrylonitrile and polyethylacrylate, and also by co-polymerizing heterocyclic monomers based on uramil azo-dyes with tolylene-2,6-diisocyanate and toluene-2,4-diisocyanate. The prepared polymers were converted to their quaternary salts ...

SummaryThe tetrahydroxy-1,4-benzoquinone(THQ)/rhodizonic acid (RDZ) redox system exhibits a reversible electrochemical behavior in neutral and basic media where the rhodizonate dianion RDZ2− predominates. In acid media, where the unionized diacid RDZ is dihydrated (RDZ, 2H2O), THQ is oxidized ac...

The tetrahydroxy-1,4-benzoquinone(THQ)/rhodizonic acid (RDZ) redox system exhibits a reversible electrochemical behavior in neutral and basic media where the rhodizonate dianion RDZ2− predominates. In acid media, where the unionized diacid RDZ is dihydrated (RDZ, 2H2O), THQ is oxidized according...