QUATERNARY AMMONIUM SALT
Synthesis of Quaternary Ammonium Salt of Piperidine Derivatives
... In conclusion, we have developed a method for the synthesis of quaternary ammonium salt of piperidine which can be use as phase transfer catalyst with good yields. The main advantage of this method ...
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MODIFICATION OF WOOL AND SILK FIBERS BY PRETREATMENT WITH QUATERNARY AMMONIUM SALT AND DYEING WITH NEW METAL COMPLEX DYE
... A metal complex dye based on acid dye was prepared; this dye proven by NMR study and IR spectroscopy. The dyeing application of the prepared dye on wool and silk fibers showed excellent dyeing properties. Wool and silk ...
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Turbulence and Cavitation Suppression by Quaternary Ammonium Salt Additives
... developed quaternary ammonium salt (QAS) deposit control additives (DCAs) affect the rheological properties of cavitating turbulent flows, resulting in an increase in the volumetric efficiency of ...
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Inhibition Effect of Water-Soluble Chitosan N-quaternary Ammonium Salt on Carbon Steel in 0.25 M H2SO4 Solution
... N-quaternary ammonium salt with good water-solubility by ...N-quaternary ammonium salt is a promising ...N-quaternary ammonium salt of chitosan ...
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Characterization and bioactivity of novel calcium antagonists - N -methoxy-benzyl haloperidol quaternary ammonium salt
... antagonists, quaternary ammonium salt derivatives of haloperidol with N-p-methoxybenzyl (X 1 ), N-m-methoxybenzyl (X 2 ) and N-o-methoxybenzyl (X 3 ) ...
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Investigation of Corrosion Inhibition of Quaternary Ammonium Salt on N80 Steel in 5M HCl Solution
... of quaternary ammonium salt increases with increase in inhibitor concentration, the inhibition efficiencies reaches a maximum value of ...that quaternary ammonium salt is an ...
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Preparation of chitin-amphipathic anion/quaternary ammonium salt ecofriendly dressing and its effect on wound healing in mice
... and quaternary ammonium salts/amphiphilic ions have become a hot field of research because of not only the wide range of potential applications and environmental protection of natural chitin sources but ...
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Effect of Quaternary Ammonium Salt on Shear Bond Strength of Orthodontic Brackets to Enamel
... In this in vitro, experimental study, sample size was calculated to be 12 in each of the four groups for assessment of shear bond strength according to a previous study by Li et al, [9] assuming alpha=0.05, beta=0.2, ...
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An expeditious and environmentally benign synthesis of dispiro-3-phenylpyrrolothiazoles in ACI/EG eutectic mixture and its antioxidant and antimicrobial activities against urinary tract pathogens
... The quaternary ammonium salt eutectic mixture, acetylcholine iodide‑ethylene glycol (ACI/EG) medium brings an efficient environment for the synthesis of dispiropyrrolothiazole with excellent yield in ...
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Reduce the Iron Content in Egyptian Feldspar Ore of Wadi Zirib for Industrial Applications
... Quaternary ammonium salt solution was used again as a cationic collector to separate feldspar from quartz in an acidic ...medium. Quaternary amines are strong collectors and are completely ...
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Synthesis of graphene oxide-quaternary ammonium nanocomposite with synergistic antibacterial activity to promote infected wound healing
... oxide-quaternary ammonium salt (GO-QAS) nanocomposite was synthesized and thoroughly investigated for synergistic antibacterial activity, underlying antibacterial mechanisms and biocompatibility in ...
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A novel and efficient process for the preparation of zolpidem, an insomnia drug
... Another reported procedure [8] for the preparation of 1, as shown in Figure 3, involves the Mannich approach for the synthesis of acetonitrile intermediate compound 6. Treatment of compound 2 with formalin and ...
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Preparation of polymer blend membranes based on cellulose acetate and quaternized polyethersulfone for ultrafiltration
... Quaternized PES is found to be compatible with CA. The extent of compatibility of CA with aminated PES under room conditions is 70/30 of CA/QASPES wt. %. Further, blending of CA with quaternized PES results in blend ...
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ABSTRACTS: July 1989137-148
... studies of the rate of Pd extraction as functions of the quaternary ammonium salt (Q’Cl-), extractant, aqueous U- concentrations and pH showed that the active metal complex w[r] ...
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Antibacterial, cytotoxic and genotoxic activity of nitrogenated and haloid derivatives of C50–C60 and C70–C120 polyprenol homologs
... at least 48 h. The DNA damage in A549 and HepG2 cells exposed to all 10, 20 and 40 μ g/mL MAS was statistically significant in comparison to the control. Our results indicate a dose-dependent increment in DNA damage in ...
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Antibiofilm activity of epoxy sealer incorporated with quaternary ammonium macromolecule
... A new concept is suggested by adding of non-nanopar- ticle macromolecules with antibiofilm features (Biosafe®, HM4100, BIOSAFE Inc., Pittsburg, PA, USA) to epoxy sealer. BioSafe® has received FDA approval (Application ...
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Synthesis and evaluation of a novel antibacterial dental resin composite with quaternary ammonium salts
... containing quaternary ammonium salt (QAS) or phosphonium salt (QPS) groups have been studied extensively as an important antimicrobial material and used for a variety of applications due to ...
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Key words
... the quaternary ammonium salt IM has a chemical structure similar to that of the aminoester DM-11 (Figs 1a and 1b), the two com- pounds seem to differ in their biological ...the quaternary ...
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A PQAS containing glass ionomer cement for improved antibacterial function
... group-containing quaternary ammonium salt (QAS) was synthesized following the procedures described elsewhere with a slight modification ...canyl-1-hydroxyethyl ammonium bromide (DTHAB) was ...
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The future of polar organometallic chemistry written in bio-based solvents and water
... CONCEPT While most of these DES studies use solvent systems based on the non-toxic quaternary ammonium salt ChCl, recent studies on the addition of aryllitium reagents to nitriles 26 to [r] ...
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