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Improved uptake of steroid hormone from aqueous solution using g-Fe2O3/NiO nanocomposites
Ali Fakhri,Sajjad Behrouz 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.26 No.-
The present paper was assume to develop a potential adsorbent and to work the adsorption reaction captivated in the removal of Steriod Hormone such as 17b-estradiol (E2) from aqueous solution using the g-Fe2O3/NiO nanocomposites. The adsorbent was characterized with different techniques such XRD, SEM, TEM and UV–vis DRS analysis. Utilizable factors thus pH, contact time equilibrium, dose of adsorbent, and temperature were so investigated. Data of adsorption investigated with the Langmuir, Freundlich, Temkin and Fakhri models. Although, Langmuir model demonstrated a high value of R2, therefore, denoting to the monolayer coverage removal of the 17b-estradiol on g-Fe2O3/NiO nanocomposites. The adsorption reaction was obtained to confirm pseudo-second-order kinetics. The parameters of thermodynamic including Gibbs free energy (DG), enthalpy change (DH) and entropy change (DS) were calculated. The results indicate the spontaneous and exothermic of adsorption reaction. The adsorption isosteric heats (DHX) were determined and represented the mechanism of adsorption was a physical process.
Cylindrical Shock Waves in Space Superthermal Fluids
Hesham Gomaa Abdelwahed,Emad Kheder El-Shewy,Ali Abd El-Rahman,Noura Fakhry Abdo 한국물리학회 2019 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.75 No.9
The three-dimensional Burgers equation is used to count the effects of the spectral index param- eter , the ion, the negative (positive) kinematics viscosity coefficients of negatively (positively) charged grains on the dissipation of cylindrical shocks. The obtained results may useful for both laboratory and space applications of plasmas.
Vinod Kumar Gupta,Shilpi Agarwal,Inderjeet Tyagi,Maryam Sohrabi,Ali Fakhri,Sahar Rashidi,Nima Sadeghi 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.41 No.-
Carbon nanofibers have been synthesized by simple facile microwave-assisted hydrothermal route andapplied as adsorbent for the fast adsorption of methamphetamine. The topological property of CNF wasanalyzed using XRD, SEM, TEM, and nitrogen adsorption–desorption instrumental techniques. Thesignificance of the independent variables and their interactions were tested by the analysis of variance(ANOVA) and t-test statistics. Influential parameters are optimized using BBD implemented with RSM,and the optimized value of pH, adsorbent dose and temperature was found to be 8.0, 0.1 g and 298 K,respectively. Under optimal conditions, the removal efficiency of methamphetamine was found to be55.25 mg/g.
Bias Atlases for Segmentation-Based PET Attenuation Correction Using PET-CT and MR
Jinsong Ouyang,Se Young Chun,Petibon, Yoann,Bonab, Ali A.,Alpert, Nathaniel,El Fakhri, Georges IEEE 2013 IEEE transactions on nuclear science Vol.60 No.5
<P>This study was to obtain voxel-wise PET accuracy and precision using tissue-segmentation for attenuation correction. We applied multiple thresholds to the CTs of 23 patients to classify tissues. For six of the 23 patients, MR images were also acquired. The MR fat/in-phase ratio images were used for fat segmentation. Segmented tissue classes were used to create attenuation maps, which were used for attenuation correction in PET reconstruction. PET bias images were then computed using the PET reconstructed with the original CT as the reference. We registered the CTs for all the patients and transformed the corresponding bias images accordingly. We then obtained the mean and standard deviation bias atlas using all the registered bias images. Our CT-based study shows that four-class segmentation (air, lungs, fat, other tissues), which is available on most PET-MR scanners, yields 15.1%, 4.1%, 6.6%, and 12.9% RMSE bias in lungs, fat, non-fat soft-tissues, and bones, respectively. An accurate fat identification is achievable using fat/in-phase MR images. Furthermore, we have found that three-class segmentation (air, lungs, other tissues) yields less than 5% standard deviation of bias within the heart, liver, and kidneys. This implies that three-class segmentation can be sufficient to achieve small variation of bias for imaging these three organs. Finally, we have found that inter- and intra-patient lung density variations contribute almost equally to the overall standard deviation of bias within the lungs.</P>
Majid Nooshkam,Fereshteh Falah,Zahra Zareie,Farideh Tabatabaei Yazdi,Fakhri Shahidi,Seyed Ali Mortazavi 한국식품과학회 2019 Food Science and Biotechnology Vol.28 No.6
Chitosan (1%) was glycated with inulin (0.5, 1,and 2%) via the Maillard reaction at various initial pHvalues (5, 5.5, and 6). Higher pHs led to a greater pH dropand increase in the intermediate products and browningintensity (BI). The chitosan–inulin conjugates were thenclassified into three levels of low, medium, and high BIthrough K-means clustering in order to investigate theeffect of BI development on the antioxidant and antimicrobialattributes of the conjugates. Covalent linkagebetween chitosan and inulin was confirmed by fouriertransform infrared spectroscopy. High BI chitosan–inulinconjugate had significantly higher antioxidant propertycompared to chitosan and other conjugate fractions. Inaddition, the conjugates obtained at low pH values mainlypresented greater antimicrobial activities than those preparedat high pHs. It can be concluded that chitosan–inulinMaillard-born conjugates can be used as novel antioxidantand antimicrobial prebiotic-based ingredients for foodapplications.