Intimately coupled photocatalysis and biodegradation (ICPB) is a novel wastewater treatment technique that has potential applications in refractory degradation. This paper reports a synergistic degradation protocol that allowing the transfer of photoelectrons between photocatalysts and microbes ...
The fate of antibiotic residues in the manure of treated animals is of considerable concern because of the potential development of antibiotic-resistant bacteria in the environment and because of the effect of these residues on manure treatment systems. The objective of this study was to determi...
The degradation behavior of veterinary antibiotics in soil is commonly studied using the following methods of adding antibiotics to the soil: (i) adding manure collected from animals fed with a diet containing antibiotics, (ii) adding antibiotic-free animal manure spiked with antibiotics and (ii...
A liquid chromatographic-tandem mass spectrometric method using an Xterra MS C18 chromatographic column (100mm×2.1 mm i.d., 3.5 μm) that allows complete separation of oxytetracycline (OTC) and the impurities: 4-epi-oxytetracycline (EOTC), tetracycline (TC), 4-epi-tetracycline (ETC), 2-acetyl-2...
The fate of oxytetracyclines (OTCs) in soil interstitial water was investigated and the structure of a number of degradation products elucidated in a time-related experiment. A previously developed separation method for LC–MS–MS able to base separate and quantify OTC and three of its epimers a...
This paper describes the development of a HPLC–MS–MS (ESI) method with baseline separation of oxytetracycline, 4-epi-oxytetracycline, α-apo-oxytetracycline and β-apo-oxytetracycline using an XTerra column and an MeOH–MilliQ-water (containing 8 mM formic acid) mobile phase. Limits of quantif...
Pharmaceuticals in waterbodies are a growing concern due to their extensive uses and adverse effects on aquatic life. Oxytetracycline (OTC) is one of tetracycline antibiotic group used for treatment of animals and humans. This study evaluates the simultaneous oxidation of OTC and ammonium under ...
Agglomerated crystals of indomethacin and epirizole were prepared by the spherical crystallization technique. The solvent used was ethanol—water—chloroform, ethyl acetate—water, or ethyl acetate—aqueous sodium chloride. From the ethanol—chloroform—water system, we obtained agglomerated cry...
We report the synthesis of novel 2H,8H-pyrano[2,3-f]chromene-2,8-dione based scaffolds by the reaction of 8-formyl-7-hydroxy-4-methylcoumarin with various active methylene compounds. A mechanism of a tandem Knoevenagel condensation and cyclisation reaction is proposed. The structure of all compo...
The inclusion complex of 7-hydroxy-4-methylcoumarin (7H4MC) with sulfobutyl ether-β-cyclodextrin (SBE-β-CD) was investigated by means of UV–vis, circular dichroism and 1H NMR spectroscopy in phosphate buffer solutions at different temperatures and pH values. The stoichiometric ratio of the co...
In this work, 8-formyl-7-hydroxy-4-methylcoumarin has been synthesized and characterized by elemental analysis, FT-IR, FT Raman, 1H NMR, 13C NMR and UV–vis spectra. The molecular geometry, harmonic vibrational frequencies and gauge including atomic orbital (GIAO) 1H and 13C chemical shift value...
The new Cu(II) complexes with 6-acetyl-7-hydroxy-4-methylcoumarin (HL1) and 8-acetyl-7-hydroxy-4-methylcoumarin (HL2) have been obtained by the electrochemical method. The density functional theory calculations and X-ray absorption spectroscopy techniques have been used to geometrically describe...
This work reports the synthesis of 7-hydroxy-4-methylcoumarin tetrasubstituted Ruthenium (III)(4a), Indium (III)(4b), Tin (IV)(4c) phthalocyanines bearing axial chloride ligand for the first time. These new metallophthalocyanines show good solubility in many organic solvents. This study also inv...
Mast cells trigger IgE-mediated allergic reactions by releasing various allergic mediators. 8-Formyl-7-hydroxy-4-methylcoumarin, also called 4μ8C, was originally known as an inositol-requiring enzyme 1 (IRE1) suppressant, but no study has examined its relationship with mast cells and allergic d...
In the search for new environmental-friendly antifoulants for replace metallic biocides, 7-hydroxy-4-methylcoumarin was synthesized according to green chemistry procedures. This compound was characterized by current organic analysis and its antifouling properties were firstly evaluated on the bi...
A novel method for synthesis of 7-hydroxy-4-methylcoumarin from resorcinol and ethyl acetoacetate via the Pechmann reaction with polyvinylpyrrolidone-supported phosphotungstic acid (PVP–HPW) catalyst is developed. The catalysts were characterized by FTIR, TGA, elemental analysis, UV–vis and a ...
The standard molar energies of combustion, ΔcUm∘ (cr, 298.15 K) of 7-hydroxy-4-methylcoumarin, 7-ethoxy-4-methylcoumarin, and 6-methoxy-4-methylcoumarin were obtained by combustion calorimetry. The experimental values are (−4536.4 ± 2.2), (−5888.0 ± 3.2), and (−5267.3 ± 2.3) kJ · mol−1, re...
The herbicide methabenzthiazuron, and inhibitor of the Hill reaction, was applied to Hordeum seeds at the time of sowing, and the greening process under continuous Fluora light was investigated to the age of 13 days. Chlorophyll and xanthophyll contents were increased by methabenzthiazuron relat...
A calorimetric study of methabenzthiazuron (MBT) has provided evidence of chemical transformation in the solid state at room temperature. Traces of water vapour were absorbed to form a hydrate, which produces a binary eutectic system with MBT at a temperature of 380.3 K and an estimated mole fra...
In a two-year lysimeter experiment with methabenzthiazuron herbicide applied in accordance with good agricultural practice in an orthic luvisol, the dissolved active ingredient fractions in the soil solutions and leaching behaviour were examined with the aid of suction candles. The highest activ...
About|Contact|Cas|Product Name|Molecular|Country|Encyclopedia
Message|New Cas|MSDS|Service|Advertisement|CAS DataBase|Article Data|Manufacturers | Chemical Catalog
©2008 LookChem.com,License: ICP
NO.:Zhejiang16009103
complaints:service@lookchem.com Desktop View