Four solvents (ethanol, isopropanol, ethylene glycol (EG) and N,N-dimethyl formamide (DMF)) that can be mixed with water in any ratio were selected to determine the dissolution performance of 7-amino-4-methylcoumarin by the classical shake-flask method. The measured temperature range began at 278.15 and ended at 303.15K, and the pressure environment was controlled at standard atmospheric pressure (101.1 kPa). Results reveal that with the addition of organic solvents, the solubilization effect of the 7-amino-4-methylcoumarin was very significant, and the larger the amount of addition, the more obvious the effect of solubilization. Not only that, the temperature change had a non-negligible effect on the dispersion of 7-amino-4-methylcoumarin, the temperature increases monotonically, and the better the dissolution. When the external conditions were kept constant, the addition of DMF made the solubilization effect of 7-amino-4-methylcoumarin most obvious among all the organic solvents used. This study involved three models including the Jouyban-Acree model and its two variants (van't Hoff-Jouyban-Acree model and Apelblat-Jouyban-Acree model) were used to correlate the solubility data of 7-amino-4-methylcoumarin in aqueous cosolvent mixtures. The RAD and RMSD reaches to 3.47×10 -2 and 1.79×10 -3 rooting in the van't Hoff-Jouyban-Acree model. The relevant parameters obtained through model calculation and experimental means are essential for product synthesis, separation and purification processes.

A novel g-C3N4/TiO2/hectorite Z-scheme composites with oxygen vacancy (Vo) defects and Ti3+ were synthesized by so-gel method and high temperature solid phase reaction. This composite exhibited high visible photo-catalytic degradation of rhodamine B (RhB). The apparent rate constant of g-C3N4/TiO2/hectorite was 0.01705 min−1, which is approximately 5.38 and 4.88 times that of P25 and g-C3N4, respectively. The enhancement of photo-catalytic efficiency of the composites can be attributed to the great light harvesting ability, high specific surface area and effective separation of electrons(e−) and holes(h+). The F element from Hectorite causes the formation of Vo and Ti3+ in TiO2, making it responsive to visible light. The effective separation of e− and h+ mainly results from Z-scheme transfer of photo-produced electrons in g-C3N4/TiO2 interface. The composites can be easily recycled and the degradation rate of the RhB still reached 84% after five cycles, indicating its good reusability.

Gene expression data composed of thousands of genes play an important role in classification platforms and disease diagnosis. Hence, it is vital to select a small subset of salient features over a large number of gene expression data. Lately, many researchers devote themselves to feature selection using diverse computational intelligence methods. However, in the progress of selecting informative genes, many computational methods face difficulties in selecting small subsets for cancer classification due to the huge number of genes (high dimension) compared to the small number of samples, noisy genes, and irrelevant genes. In this paper, we propose a new hybrid algorithm HICATS incorporating imperialist competition algorithm (ICA) which performs global search and tabu search (TS) that conducts fine-tuned search. In order to verify the performance of the proposed algorithm HICATS, we have tested it on 10 well-known benchmark gene expression classification datasets with dimensions varying from 2308 to 12600. The performance of our proposed method proved to be superior to other related works including the conventional version of binary optimization algorithm in terms of classification accuracy and the number of selected genes.

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The corrosion behaviour of polymer‐laminated steel in sodium chloride (NaCl) solution was studied. The iron migration amount was determined by inductively coupled plasma optical emission spectrometry (ICP‐OES). The result indicated that the migration of iron increased with time and a turning point occurred in 3 wt.% NaCl solution when polymer‐laminated steel cans containing NaCl solution soaked at different temperatures for 240 h. In addition, the changes of the PET/TiO2 composite film after soaking were analysed by the differential scanning calorimeter (DSC), scanning electron microscope (SEM) and energy dispersive spectrometer (EDS). The crystallinity of the composite film decreased, the porosity increased and the surface cracks formed. Moreover, the composition and morphology of the corrosion products were characterized by the X‐ray diffraction (XRD), SEM and EDS, indicating that the corrosion products were Fe3O4 and Fe2O3. Based on the results, a schematic diagram of the corrosion mechanism of polymer‐laminated steel cans was given.