Enhanced photodegradation of Rhodamine B under visible light by N-K2Ti4O9/MIL-101 composite

N-K₂Ti₄O₉/MIL-101 composites were successfully synthesized by a facile hydrothermal method, and were characterized by powder X-ray diffraction, UV–vis diffuse reflectance spectroscopy, the valence band X-ray photoelectron spectroscopy, field emission transmission electron microscopy, photoluminescence emission spectra, N₂ adsorption–desorption and thermogravimetric analysis. Photocatalytic activities of N-K₂Ti₄O₉, MIL-101 and the composites were investigated by the degradation of Rhodamine B (RhB) under visible light irradiation. The results show that the composites exhibit higher photocatalytic activity as compared with the pure materials. The synergistically enhanced photocatalytic activity of the composites is due to big adsorption capacity of MIL-101 and high separation efficiency of photogenerated electron-hole pairs through interfaces between N-K₂Ti₄O₉ and MIL-101.     

Annual and regional variations of aflatoxin B1 levels seen in grains and feed coming from Croatian dairy farms over a 5-year period

The aim of the study was to investigate annual and regional differences in the level of aflatoxin B₁ (AFB₁) in grains and dairy cattle feed. Maize (n = 972), wheat (n = 201), barley (n = 147), oat (n = 136), grain mixtures (n = 168), and dairy cattle feed (n = 325) were sampled from 2009 to 2013 on different farms and in different farm factories situated in four Croatian regions. The samples were analysed for AFB₁ using the validated ELISA immunoassay. AFB₁ was determined in 16.4% of all investigated samples, among which maize was proven to be the most contaminated, with 21.7% of the samples recovered during 2013 harbouring AFB₁ in concentrations over the permissible ones. Levels higher than permitted were observed in 17.9% and 12.3% of grain mixtures and dairy cattle feed, respectively, whereas concentrations of AFB₁ determined in other crops throughout the investigated period met the stipulated requirements. The results revealed the AFB₁ occurrence to be significantly (p < 0.05) dependent on the cultivation region, with the highest levels generally found in maize harvested in 2013 and consequently in grain mixtures and cattle feed that can most likely be associated with climatic conditions as the most critical factor for mould formation, and thus also AFB₁ production.     

常减压减一线生产柴油组分的探讨

从理论上分析了降低减一线馏程干点的可能性 ,并通过操作调整 ,降低了减一线馏程干点 ,使之符合作柴油调合组分。不仅对原直馏柴油的质量不产生影响 ,且经济效益可观。     

2002 Annual Report of the American Psychological Association.

Presents the 2002 Annual Report of the American Psychological Association. Directorate Reports, the President's Address, and Treasurer's Report are included. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

ZL101合金锶变质效果及热处理工艺的改进

对现场生产的ZLl01合金铸件材质进行了全面分析，针对存在的产品成分不准，变质效果不好，力学性能不合格的问题，通过改进合金的锶变质工艺和热处理工艺，改善了合金的组织和性能，达到了对材料的成分、性能的各项要求。     

基于TS101型DSP链路口的多通道高精度数据采集电路设计

介绍一种基于数字信号处理器(DSP)TS101链路口的多通道高精度数据采集电路的设计方法,详细阐述利用多个ADS8361型A/D转换器进行数据采集,并经TS101链路口传输数据的FP-GA和DSP设计实现,讨论如何提高A/D转换精度的问题.     

Mutual recognition of the results of measurements and tests and formation of a world-wide metrology system

The main prerequisites are considered in a historical aspect and steps ate taken in creating a world-wide metrology system with the aim of providing conditions for the mutual recognition of measurement results. __________ Translated from Izmeritel’naya Tekhnika, No. 11. pp. 59–62, November, 2007.     

对数型产量衰减曲线方程的建立与应用

在产量衰减曲线方程的基础上，通过数学推导，得到了一种对数型产量减曲线方程。方程既可以用来预测油气田整个开发阶段的指标，又可以比较准确的测算油气田的可采集量。对国内外一些油田的实际应用表明，对数型产量衰减曲线方程是十分实用和有效的。     

迈向21世纪的建筑艺术观

自现代主义建筑艺术创作理论之后，建筑创作表现出一直被怀疑为某种程度的哗众取宏。在这些繁杂的理论争论中，我们面临着如何迈向21世纪新历程的挑战？如何面对电脑、信息和新技术的冲击，避免建筑创作中人的主创作用的消蚀，是建筑创作迈向21世纪的重要课题。本篇文章主要从建筑艺术哲学角度，分析了当今建筑创作的现状和特征，提出没有任何规范约束的个性创作自由，将使21世纪建筑创作思维充满活力与生机。