[en] A Cu–2.5%Sn alloy was fabricated by continuous unidirectional solidification (CUS). The EBSD was used to analyse the microstructure of CSU Cu–2.5%Sn alloy. The results show that the alloy is composed of coarse columnar grains, which grow along the direction of [001] and [101], and the average diameter of the columnar grains is about 470 μm. Most of grain boundaries between the columnar grains are small-angle and the rest are high-angle grain boundaries. It is also found that the CUS Cu–2.5%Sn alloy has strong {110} <110> texture and cubic texture. (paper)

[en] ⁶⁰Co γ-ray was used to irradiate newly-harvested sweet corn and the results showed that the effects of irradiation on soluble solids, sucrose, starch and total sugar were not significant. The viscosity of starch decreased with the increasing of irradiation dose. The preservation duration of irradiated sweet corn was 7 days longer than that of CK, and the sweet, smell, taste of sweet corn had no abnormal change

[en] Graphical abstract: N–F codoped and molecularly imprinted TiO_2 were prepared by simple ethanol–water solvothermal method. Their mechanism of high adsorption capacity, preferable photocatalytic degradation activity, good selectivity and excellent reusability for target contaminants were identified and discussed. - Highlights: • Synthesis of N–F codoped and molecularly imprinted TiO_2 (MIP-NFTs) is simple. • Molecular imprinting enhanced the adsorption capacity and selectivity of MIP-NFTs. • MIP-NFTs show high photocatalytic activity under simulated solar light. • MIP-NFTs exhibit excellent reusability due to their inorganic framework. - Abstract: N–F codoped and molecularly imprinted TiO_2 (MIP-NFTs) were successfully prepared by simple ethanol–water solvothermal method using 2-nitrophenol (2NP) and 4-nitrophenol (4NP) as template molecules (target contaminants), respectively. The surface structure and properties of the catalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen adsorption/desorption measurements (BET), X-ray photoelectron spectroscopy (XPS) and UV–vis diffuse reflectance spectra (UV–vis DRS). In comparison with non-imprinted N–F codoped TiO_2 nanocomposites (NIP-NFTs), MIP-NFTs show a higher adsorption, good selectivity and preferable degradation capacity toward the target contaminants. The adsorption amounts of 2NP and 4NP over the corresponding MIP-NFTs are about 1.78 and 2.21 times of that over NIP-NFTs, respectively. MIP-NFTs show a much higher adsorption capacity and selectivity for target contaminants in the mixed solution. Degradation selectivity experiments demonstrate that the selectivity coefficient (R) of degradation of 2NP relative to 4NP over 2NP/MIP-NFTs and 4NP relative to 2NP over 4NP/MIP-NFTs are 1.93 and 1.61, respectively. The enhancement about adsorption capacity and selectivity can be attributed to the chemical interaction and size matching between target contaminants and imprinted cavities. The apparent rate constants for the photodegradation of 2NP and 4NP over the corresponding MIP-NFTs are 0.05233 min"−"1 and 0.03734 min"−"1, being 267% and 198% of that over NIP-NFTs under simulated solar light. Moreover, MIP-NFTs exhibit excellent reusability due to their inorganic framework.