Results 21 to 30 of about 20,444 (199)

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

Structures of quaternary ammonium salt-based antibody-drug conjugates based on CPTS-1 and WL-14.

, 2023
Structures of quaternary ammonium salt-based antibody-drug conjugates based on CPTS-1 and WL-14.
Lei Wang (6656), Shulei Zhu (8821937), Yifan Zhang (119570), Tong Yang (103174), Xuemei Cao (331331), Zhiyang Chen (4006895), Mengyuan Ding (4530670), Sicheng Yin (11777608), Weinan Li (844080), Qingsong Guo (4372993), Liang Zhang (41392), Wei Lu (3580)   +11 more
core   +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

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

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

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
doaj   +1 more source

Synthesis and Resolution of an Axially Chiral Spirocyclic Quaternary Ammonium Ion‐Based Phase‐Transfer Catalyst

, 2023
We report the synthesis of a novel spirocyclic quaternary ammonium salt that possesses axial chirality. Enantiopure material was obtained by fractional crystallization of the corresponding (R,R)-tartrate salt.
Li, S., Shen Li, List, B., Benjamin List, Hui Zhou, Zhou, H.   +5 more
core   +1 more source

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

Characterization and Solution Properties of Quaternary-Ammonium-Salt-Type Amphiphilic Gemini Ionic Liquids

, 2019
Quaternary-ammonium-salt-type amphiphilic gemini compounds (Cm-2-Cn X, where m and n represent the alkyl chain lengths; m = 4, 6, 8, 10; n = 2, 4, 6, 8, 10; m ≥ n; and X indicates the counterion BF4, PF6, OTf, FSA, or NTf2) were synthesized by the ...
Risa Kawai (494245), Shiho Yada (3903907), Tomokazu Yoshimura (2070670)   +2 more
core   +1 more source