Results 11 to 20 of about 18,101 (260)

Copper Corrosion inhibition by a Quaternary Ammonium Salt-assisted Benzotriazole [PDF]

Archives of Metallurgy and Materials, 2023
Quaternary ammonium salt (QAS) Hyamine 1622 and benzotriazole (BTAH) were used to form a protective layer on copper surface to resist the corrosion by immersing the copper into the inhibitors-containing solutions. The inhibitor’s anticorrosion properties
Chuanyun Wan, Xiaotao Li, Hao Xing
doaj   +1 more source

Enantioselective Synthesis of Acyclic Orthogonally Functionalized Compounds Bearing a Quaternary Stereocenter Using Chiral Ammonium Salt Catalysis

ChemistryOpen, 2021
We herein report an asymmetric protocol to access a series of orthogonally functionalized acyclic chiral target molecules containing a quaternary stereogenic center by carrying out the enantioselective α‐alkylation of novel orthogonally functionalized ...
Katharina Röser, Bettina Berger, Prof. Michael Widhalm, Prof. Mario Waser   +3 more
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Estudo da emissão por fluorescência de ultravioleta na quantificação de um inibidor de corrosão do tipo sal de amônio quaternário em água

Química Nova, 2012
Quaternary ammonium salts are the corrosion inhibitors most frequently used by the oil industry. In this study, the ultraviolet fluorescence technique was evaluated for the analysis of a quaternary ammonium salt in water as a corrosion inhibitor.
Herllaine de Almeida Rangel, Fábio Merçon   +1 more
doaj   +1 more source

Recent advances in the application of quaternary ammonium compounds in biomedical materials

口腔疾病防治, 2019
Microbial infections affect people worldwide. Quaternary ammonium salts serve antibacterial, antifungal,antiviral, anti⁃matrix metalloproteinase and polymerization functions. While the modification of biomaterials with quater⁃ nary ammonium salts cannot
JIAO Yang, CHEN Jihua
doaj   +1 more source

Fabrication of bamboo fiber-based adsorbent by radiation grafting and rapid adsorption of phosphate

Fushe yanjiu yu fushe gongyi xuebao, 2021
Quaternary ammonium salt modified bamboo fiber was prepared by radiation grafting of methacryloxyethyltrimethyl ammonium chloride on the bamboo fiber. The modified bamboo fiber was characterized by scanning electron microscopy, Fourier transform infrared
DU Jifu, DONG Zhen, YANG Xin, ZHAO Long
doaj   +1 more source

Multilayered Curcumin-Loaded Hydrogel Microcarriers with Antimicrobial Function

Molecules, 2022
The design of multifunctional microcarriers has attracted significant attention because they combine various functions within a single system. In this study, we developed a set of multilayered hydrogel microcarriers, which were first loaded with ...
Weronika Szczęsna, Marta Tsirigotis-Maniecka, Łukasz Lamch, Lilianna Szyk-Warszyńska, Ewa Zboińska, Piotr Warszyński, Kazimiera A. Wilk   +6 more
doaj   +1 more source

Antibacterial activity of gemini quaternary ammonium salts [PDF]

FEMS Microbiology Letters, 2013
A series of gemini quaternary ammonium salts (chlorides and bromides), with various hydrocarbon chain and spacer lengths, were tested. These compounds exhibited antibacterial activity against both Gram-positive and Gram-negative bacteria and were not mutagenic.
Ewa, Obłąk, Agata, Piecuch, Katarzyna, Guz-Regner, Ewa, Dworniczek   +3 more
openaire   +2 more sources

Azobenzene Based Photo-Responsive Hydrogel: Synthesis, Self-Assembly, and Antimicrobial Activity

Gels, 2022
A new azobenzene-based symmetric amphiphile was synthesized and characterized using 1H NMR spectroscopy. Its self-assembly behavior as well as photo-responsive behavior in its solution and gel states were investigated.
Runmiao Yang, Wei Jin, Chingcheng Huang, Yuhai Liu   +3 more
doaj   +1 more source

Correlation and Prediction of Thermodynamic Properties for Quaternary Ammonium Salt Types by Applying the Modified Nonelectrolyte UNIQUAC-NRF Model [PDF]

Iranian Journal of Chemistry & Chemical Engineering
The osmotic and activity coefficients of quaternary ammonium salt types are correlated and predicted by applying a modified nonelectrolyte UNIQUAC-NRF equation.
Ali Hosseini Eghbal, Seyed Hossein Mazloumi   +1 more
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Complicated synergistic effects between three corrosion inhibitors for Q235 steel in a CO2-saturated 3.5 wt% NaCl solution

International Journal of Electrochemical Science, 2019
The corrosion inhibition of a one-component inhibitor, a bicomponent inhibitors and a three-component inhibitor consisting of 4-methylpyridine quaternary ammonium salt (PQ), quinoline quaternary ammonium salt (QQ) and thiourea (TU) for Q235 steel in a ...
Junlei lang, Yuxin Hu, Hu Wang, Yuanqiang Zhu, Yuan Wang, Zhen Nie, Yingymg Wang, Bernard Normand   +7 more
doaj   +1 more source