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Gao Y.,Anhui University | Deng X.,Anhui University | Xu Y.,Anhui Entry Exit Inspection and Quarantine Bureau | Yuan X.,Anhui University
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society

LaF3:Eu nanotube arrays were fabricated in the porous anodic aluminum oxide template by a suction filtering method at subatmospheric pressure. The phase structure, morphology and chemical composition of the LaF3:Eu nanotubes were characterized by X-ray diffraction, scanning electron microscopy, selected area electron diffraction and energy dispersive spectrometry, respectively. The effect of Eu3+-doping amount on the luminescence properties of the LaF3:Eu nanotube arrays was investigated. The results show that the LaF3:Eu nanotube arrays are amorphous with a controllable morphology, and the size of nanotubes is 100 nm. The mole ratio of La, F and Eu in the LaF3:Eu nanotubes is 23.42:72.94:3.64. According to the photoluminescence spectra, the LaF3:Eu nanotube arrays have the most intensive fluorescence when the optimum doping amount of Eu3+ is 6% in mole fraction. Source

Liang J.,Hefei University of Technology | Xu J.,Hefei University of Technology | Pan J.,Hefei University of Technology | Ge M.,Hefei University of Technology | Zong K.,Anhui Entry Exit Inspection and Quarantine Bureau
International Journal of Food Properties

The objective of this work was to identify the main allergenic proteins and to assess the influence of high hydrostatic pressure on the potential allergenicity of high hydrostatic pressure pineapple juice. Fresh pineapple juice was treated with different pressures and the allergenic proteins were extracted and analyzed by sodium dodecyl sulfate polyacrylamide gel electropheresis, Western bloting and liquid chromatography-tandem mass spectrometry. The main allergenic proteins were detected as 24-kDa and 14-kDa bands by serum of pineapple-allergic patients. liquid chromatography-tandem mass spectrometry analysis of these bands showed that they actually consisted of a mixture of several isotypes of cysteine proteinases. Among these, bromelain (Ananas comosus) is a known allergen named Ana c 2 and it is highly homologous to other cysteine proteinases. Enzyme-linked immunosorbent assay assay of high hydrostatic pressure pineapple juice carried out at ambient temperature (18-22°C) showed that the higher the pressure, the higher the reduction in allergenicity, yielding a maximum reduction of about 20% under 500 MPa. However, in the case of 400 MPa and 50°C, the reduction rate of allergenicity was higher, up to 50% compared to that of the sample at 20°C without high hydrostatic pressure treatment. Taken together, the results suggested that high-pressure treatment could alter the potential allergenicity of pineapple juice allergens and identified Ana c 2 and a few other related cysteine proteinases as the main allergens. © Taylor and Francis Group, LLC. Source

Chen Y.,Anhui Academy of Agricultural Sciences | Yao J.,Anhui Entry Exit Inspection and Quarantine Bureau | Wang W.-X.,Anhui Academy of Agricultural Sciences | Gao T.-C.,Anhui Academy of Agricultural Sciences | And 2 more authors.
European Journal of Plant Pathology

Sensitivity to epoxiconazole of 90 single-spore isolates of Magnaporthe oryzae was determined. The EC50 values for epoxiconazole in inhibiting mycelial growth of the 90 M. oryzae isolates were 0. 11-0. 86 μg/ml, with an average EC50 value of 0. 260 ± 0. 082 μg/ml. There was no correlation between sensitivity to epoxiconazole and sensitivity to carbendazim or iprobenfos. In protective and curative tests, epoxiconazole applied at 200 μg/ml provided over 70 % control efficacy, while tricyclazole exhibited better protective than curative activity. The results of four field trials performed in 2010 and 2011 at two sites showed that epoxiconazole at 112. 5 g a. i/ha provided over 75 % control efficacy, which was similar to tricyclazole with 300 g a. i./ha and better than carbendazim with 562. 5 g a. i./ha. © 2012 KNPV. Source

Liu T.,Anhui University of Science and Technology | Li B.,Anhui University of Science and Technology | Hao Y.,Anhui University of Science and Technology | Han F.,Anhui Entry Exit Inspection and Quarantine Bureau | And 2 more authors.
Applied Catalysis B: Environmental

Incorporating plasmonic Ag nanoparticles into mesoporous metal-oxide (MMO) semiconductors will achieve collective effect to greatly increase the photocatalysis. This work demonstrated a general two-step method to obtain diverse Ag/MMO composite photocatalysts with plasmon-enhanced photocatalytic activity. Several typical MMO (TiO2, ZnO, and CeO2) semiconductors were synthesized by integrating evaporation-induced self-assembly and in situ pyrolysis of metal precursors. Different amounts of Ag nanoparticles were then loaded in these MMO semiconductors through a facile photodeposition process. The Ag nanocrystals with sizes of 50-100nm were embedded in MMO semiconductors, endowing the Ag/MMO composites notable visible light absorption. The photocatalytic activities of the as-prepared diverse photocatalysts were studied systematically. The influencing factors including MMO species, mesoporous structure, and Ag loading amount on the photocatalytic activity were discussed in detail. The Ag/MMO composites exhibited much improved photocatalytic activity than their pure MMO semiconductors. The mesoporous TiO2 with the Ag-loading amount of 5wt.% exhibited the best photocatalytic performance for photodegrading both methylene blue and phenol under a simulated sunlight. The enhancement in photocatalysis is attributed to the synergistic effect of the mesoporous structures for efficient mass transfer as well as the Ag nanoparticles providing plasmonic enhanced light absorption. © 2014 Elsevier B.V. Source

Yao J.,Anhui Agricultural University | Zhang L.,Anhui Agricultural University | Chen X.,Anhui Entry Exit Inspection and Quarantine Bureau | Li Z.,Anhui Agricultural University
Biocontrol Science and Technology

Field survey of the entomopathogenic fungus Beauveria bassiana in association with the red turpentine beetle, Dendroctonus valens, was undertaken in three pine plantations in Northern China. In total, 88 strains of B. bassiana sensu lato were isolated from the soil, bark, beetle frass, living adult and cadaver samples and soil was proved to be an important inoculum reservoir for fungal entomopathogens. Of these, 77 isolates were included for genetic diversity analysis by PCR for inter-simple sequence repeats (ISSR). Genetic diversity and population structure analysis of the isolates from three sites and five niches demonstrated high genetic diversity and heterogeneity between and/or within populations. Wright's statistics revealed a high gene flow rate (4.529) among the three populations, especially among the soil-derived isolate subpopulations. Low variation was mainly caused (94.8%) by variation among different substrates, suggesting the importance of microhabitat substrates on genetic diversity of B. bassiana. Phylogenetic variation was not associated with geographic distance. © 2012 Copyright Taylor and Francis Group, LLC. Source

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