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Sepideh Afshari Majid Montazer Tina Harifi Mahnaz Mahmoudi Rad 《Coloration Technology》2019,135(6):427-438
In this study, we aimed to produce a coloured polyester fabric through the in situ sonosynthesis of copper nanoparticles using copper sulphate, hydrazine, sodium hydroxide and polyvinylpyrrolidone. The treated fabrics were characterised by X‐ray diffraction, field emission scanning electron microscopy, energy‐dispersive X‐ray spectroscopy and elemental mapping. Moreover, mechanical properties, wettability and antibacterial/antifungal activities of the treated fabrics were evaluated. Central composite design based on the response surface methodology was used to study the effect of copper sulphate, hydrazine hydrate and sodium hydroxide on the weight gain and colour of the treated fabrics. In addition to their roles as reducing agents, hydrazine and sodium hydroxide were responsible for the simultaneous aminolysis and hydrolysis of polyester, increasing the adsorption of nanoparticles on the surface. According to the results, the reddish brown samples treated with copper nanoparticles showed excellent antibacterial and antifungal efficiencies, improved tensile strength and decreased wettability. 相似文献
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Ahmad Saleh Beyt Sheikh Rafie Mahnaz Ghorabie Seyed Mojtaba 《Multimedia Tools and Applications》2021,80(8):11583-11605
Multimedia Tools and Applications - Spam tweets might cause numerous problems for users. An automatic method is introduced as a proposed method to detect spam tweets. This method is based on... 相似文献
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Development of a Green Chromatographic Method for Simultaneous Determination of Food Colorants 总被引:2,自引:1,他引:1
Mahnaz Khanavi Mannan Hajimahmoodi Ali Mohammad Ranjbar Mohammad Reza Oveisi Mohammad Reza Shams Ardekani Ghazaleh Mogaddam 《Food Analytical Methods》2012,5(3):408-415
A green chromatographic method for the successful separation and determination of eight synthetic food colorants (Tartrazine
E 102, Quinoline Yellow E 104, Sunset Yellow E 110, Carmoisine E 122, Ponceau 4R E 124, Allura Red E 129, Indigo Carmine E
132 and Brilliant Blue E 133) was developed. A C8 stationary phase was used and the mobile phase was a mixture of 50 mM phosphate
buffer at pH 7 containing triton X-100 (0.25% v/v). The method was validated as regards its selectivity, linearity, precision, accuracy, limit of detection (LOD) and quantification
(LOQ). LOD of colorants varied between 0.17 μg mL−1 in Allura Red and 1.91 μg mL−1 in Quinoline Yellow. In the case of LOQ, it was ranged from 0.52 in the Allura Red to 5.79 in the Quinoline Yellow. The method
applicability was verified by the determination of colorants present in 22 samples. The 15 samples were only unicolor and
the color concentration in these samples varied from 18.426 ± 0.100 to 610.390 ± 4.711 ppm. The method can be used successfully
to the determination of binary and ternary color food and drug samples too. This method provides substantial green benefits
without using organic solvents in extraction procedure and in both liquid and paper chromatographic methods. 相似文献
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Bakhshali Massoumi Nasrin Sabbah Isfahani Mahnaz Saraei Aliakbar Entezami 《应用聚合物科学杂志》2012,124(5):3956-3962
The copolymerization of pyrrole (Py) with N‐ethyl pyrrole, N‐butyl pyrrole, and N‐octyl pyrrole (NOPy) was carried out by electrochemical and chemical oxidation. In the electrochemical method, copolymer thin films with different feed ratios of monomers were synthesized by the cyclic voltammetry method in a lithium perchlorate (LiClO4)/acetonitrile (CH3CN) electrolyte on the surface of a glassy carbon working electrode. The deposition conditions on the glassy carbon, the influence of the molar ratios of the monomers on the formation of the copolymers, and the electroactivity of the copolymers were investigated with cyclic voltammetry. Nanoparticles made of a conjugate of the copolymers with different feed ratios of monomers were prepared by chemical polymerization (conventional and interfacial methods) in the presence of iron(III) chloride hexahydrate (FeCl3·6H2O) as the oxidant. Nanostructural copolymers with higher conductivities were synthesized by simple tuning of the preparation conditions in a two‐phase medium. Fourier transform infrared spectroscopy, scanning electron microscopy, and four‐probe conductivity measurement techniques were applied for the characterization of the obtained copolymers. The conductivity of the obtained copolymer by an interfacial method with chloroform as the organic phase was 20 times higher than the copolymer obtained via an interfacial method with toluene as the organic phase and 700 times higher than the copolymer prepared by the conventional method (for a molar ratio of 70 : 30 Py : NOPy). © 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012 相似文献
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