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The relationship between synthetic factors and the resulting structures is critical for rational synthesis of zeolites and related microporous materials. In this paper, we develop a new feature selection method for synthetic factor analysis of (6,12)-ring-containing microporous aluminophosphates (AlPOs). The proposed method is based on a maximum weight and minimum redundancy criterion. With the proposed method, we can select the feature subset in which the features are most relevant to the synthetic structure while the redundancy among these selected features is minimal. Based on the database of AlPO synthesis, we use (6,12)-ring-containing AlPOs as the target class and incorporate 21 synthetic factors including gel composition, solvent and organic template to predict the formation of (6,12)-ring-containing microporous aluminophosphates (AlPOs). From these 21 features, 12 selected features are deemed as the optimized features to distinguish (6,12)-ring-containing AlPOs from other AlPOs without such rings. The prediction model achieves a classification accuracy rate of 91.12% using the optimal feature subset. Comprehensive experiments demonstrate the effectiveness of the proposed algorithm, and deep analysis is given for the synthetic factors selected by the proposed method. [ABSTRACT FROM AUTHOR]

In this work, we present an alternative route to supply excessive selenium (Se) for the deposition of Sb2Se3 thin films by the co-evaporation of Se and Sb2Se3. Scanning electron microscopy (SEM) images showed that additional Se modified the growth process and surface morphology of Sb2Se3 thin films. X-ray diffraction (XRD) patterns confirmed that this co-evaporation process enhanced the beneficiary preferred orientations, and capacitance–voltage (C–V) measurement showed that the carrier concentration of the Sb2Se3 absorber increased with the additional evaporation of Se. Accordingly, the efficiency of the devices employing co-evaporated Sb2Se3 absorber layers increased significantly from 2.1 to 3.47% with a open-circuit voltage (VOC) of 364 mV, a short-circuit current density (JSC) of 23.14 mA/cm2, and a fill factor (FF) of 41.26%. [ABSTRACT FROM AUTHOR]

cold-resistant bacterium (strain GYT1) for degrading nitrobenzene was isolated from sediment in the Wei-he River by cultivation, domestication, enrichment, screening, and purification. Strain GYT1 is observed as a gram-negative bacterial strain of short pole shape according to the analysis of its morphology and physiological-biochemical characteristics. Strain GYT1 is identified as Methylobacillus sp. Lap based on the similarity analysis of its 16S rDNA gene sequence with the sequences logged in RDP database and the GenBank. Methylobacillus sp. Lap has never been reported to be able to degrade nitrobenzene. The degradation characteristics show that strain GYT1 can grow with nitrobenzene as the sole source of carbon and nitrogen. Nitrobenzene can be degraded completely when nitrobenzene concentration is less than 711μg/L at 12±0.5℃, with 15ml inoculation volume of strain GYT1 andpH 6.3-7.2. The degradation process meets the first-order reaction dynamics. According to the results of GC-MS analysis, nitrobenzene can be degraded into small molecule substances of non-toxicity or low-toxicity, and finally into CO2 and H2O by multi-step biochemical reactions under the action of enzyme catalytic metabolism. [ABSTRACT FROM AUTHOR]