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In the work, synthesis and application of the ternary nanocomposite of SiO2/Fe3O4/multi-walled carbon nanotubes (SFCNT) for adsorptive removal of malachite 相似文献
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Heshmatollah Alinezhad Razieh Azimi Mahboobeh Zare Mohammad Ali Ebrahimzadeh Shahram Eslami Seyed Fazel Nabavi 《International Journal of Food Properties》2013,16(5):1169-1178
In this study, antioxidant and antihemolytic activities of ethanolic extract of flowers, leaves, and stems of Hyssopus officinalis L. Var. angustifolius were investigated employing different in vitro assay systems. Extracts showed good antioxidant activity. IC50 for 1,1-diphenyl-2-picryl hydrazyl radical-scavenging activity were 148.8 ± 4.31 μg mL?1 for flowers, 79.9 ± 2.63 μg mL?1 for stems, and 208.2 ± 6.45 μg mL?1 for leaves. All extracts showed moderate iron (II) chelating ability. Extracts exhibited good antioxidant activity in the hemoglobin-induced linoleic acid model and also they were capable of scavenging hydrogen peroxide in a concentration dependent manner. Extracts showed good antihemolytic activity againts hydrogen peroxide-induced hemolysis (IC50 were 48.51 ± 2.27 μg mL?1 for flowers, 19.47 ± 0.73 μg mL?1 for leaves, and 63.1 ± 2.65 μg mL?1 for stems). The total amount of phenolic compounds in the extracts was determined as gallic acid equivalents and total flavonoid content was calculated as quercetin equivalents from a calibration curve. 相似文献
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Seyed Jafar Sadjadi Mehdi Heidari Amin Alinezhad Esboei 《The International Journal of Advanced Manufacturing Technology》2014,70(5-8):1505-1514
Staff scheduling is one of the most relevant issues among production planning managers. The problem is to set up an appropriate schedule for various employees to maximize the performance measurement. There are different conflicting criteria with any scheduling problem such as cost minimization, efficiency maximization, etc. The proposed model of this paper develops a new multiobjective decision-making scheduling problem, and the resulted problem is solved using two different techniques of goal programming and augmented epsilon constraint. The implementation of the new proposed model is demonstrated with a real-world case study, and they are analyzed. The preliminary results indicate that the epsilon-constraint method somewhat performs better than goal programming technique. 相似文献
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Mehdi Razzaghi-Abyaneh Masoomeh Shams-Ghahfarokhi Mohammad-Bagher Rezaee Kamkar Jaimand Soheil Alinezhad Reza Saberi Tomoya Yoshinari 《Food Control》2009,20(11):1018-1024
In order to find out plants useful to controlling aflatoxins (AFs) production, the essential oils (EOs) from 12 medicinal plants prepared by hydrodistillation were studied with special reference to the inhibition of Aspergillus parasiticus growth and AFs production. The toxigenic fungus was cultured in presence of various oils in 6-well microplates using a microbioassay technique. The mycelial mass was estimated as an index of fungal growth, while the aflatoxins B1 (AFB1) and G1 (AFG1) were measured by high performance liquid chromatography (HPLC). Among plants tested, Thymus vulgari and Citrus aurantifolia were found to inhibit both A. parasiticus and AF production. The EOs from Mentha spicata L., Foeniculum miller, Azadirachta indica A. Juss, Conium maculatum and Artemisia dracunculus were only inhibited fungal growth, while Carum carvi L. effectively inhibited AF production without any obvious effect on fungal growth. The other plants including Ferula gummosa, Citrus sinensis, Mentha longifolia and Eucalyptus camaldulensis had no effect on A. parasiticus growth and AF production at all concentrations used. The IC50 values of T. vulgaris, C. aurantifolia and C. carvi for AF inhibition were reported as 93.5, 285.6, and 621.9 μg/ml for AFB1, while they were calculated as 11.7, 50.1, and 56.0 μg/ml for AFG1. These results indicate that the EOs of some medicinal plants may be considered as potential candidates to protect foods and feeds from toxigenic fungus growth and subsequent AF contamination. 相似文献
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Experimental and modeling approach to study separation of water in crude oil emulsion under non-uniform electrical field 总被引:1,自引:0,他引:1
Kazem Alinezhad Morteza Hosseini Kamyar Movagarnejad Mehdi Salehi 《Korean Journal of Chemical Engineering》2010,27(1):198-205
In many ways, the use of high electrostatic fields in the separation of water-in-oil emulsions is a mature technology, with
most developments arising from attempts to improve the process of crude oils, in terms of the separation of water, salt or
other hydrophilic impurities. In this way, different mechanisms have been proposed until now and several parameters have been
studied to estimate the level of separation. In this work, after a review of the process and its application, new results
are presented for AC currents under non-uniform electrical fields (dielectrophoresis) on the water-in-crude oil emulsion.
Then the effects of voltage, temperature, volume fraction and API are studied on degree of separation. Finally, a correlation
is presented among these parameters by an experimental model. 相似文献
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Fazel Mohammadi-Moghadam Abbas Khodabakhshi Marzieh Farhadkhani Sara Hemati Neda Masoudipour Firoozeh Shahgholian Heshmatollah Nourmoradi 《Journal of surfactants and detergents》2020,23(6):1099-1109
Trichloroethylene (TCE) is commonly found in ground water, and it may serve as a major source of many types of cancers such as kidney, liver, lymphatic glands, and spinal cord. In the present research, TCE uptake from aqueous media by montmorillonite (Mt) modified by tetradecyl trimethyl ammonium bromide (TTAB) surfactant was explored. Firstly, the characteristics of raw and modified montmorillonite (raw-Mt and TTAB-Mt) were analyzed by SEM, FTIR, XRD, and XRF instruments. Then, the sorption process was evaluated as a function of different factors such as surfactant loading rate, pH, ionic strength, contact time, sorbent dosage, TCE concentration, temperature, and regeneration agent. The maximum TCE sorption by the modified clay was obtained at surfactant loading rate of 120% cation exchange capacity of the clay. The maximum removal efficiency of TCE by the modified clay was 99.6% at pH 5 and 30 min contact time. The findings also exhibited that the isotherm and kinetic sorption followed the Freundlich and pseudo-second-order models, respectively. It can be concluded that TTAB-Mt, as a cheap, abundant, non-toxic, and environmental friendly adsorbent can be considered to remove TCE in aqueous phase. 相似文献