工业磨小麦清洗设备的清洗效果研究

产自罗马尼亚品种为Dropia的小麦清洗后采用工业滚筒磨上的清洗设备进行清洗加工。通过考察不同设备从谷物中去除杂质总量来评价小麦清洗设备的清洗效果。采用组合清洗器和缩进分离器时杂质分离效率分别为83.42%和82.83％。通过清洗，灰分含量减少0.0225％，而破碎的麦粒为0.223％。对清洗设备的物理参数与杂质含量之间的相关性也进行了研究。结果表明，千粒重和杂质含量呈负相关性。     

Covalent triazine framework with efficient photocatalytic activity in aqueous and solid media

Covalent triazine frameworks (CTFs) have been recently employed for visible light-driven photocatalysis due to their unique optical and electronic properties. However, the usually highly hydrophobic nature of CTFs, which originates from their overall aromatic backbone, leads to limitations of CTFs for applications in aqueous media. In this study, we aim to extend the range of the application media of CTFs and design hybrid material of a CTF and mesoporous silica (SBA-15) for efficient photocatalysis in aqueous medium. A thiophene-containing CTF was directly synthesized in mesopores of SBA-15. Due to the high surface area and the added hydrophilic properties by silica, the hybrid material demonstrated excellent adsorption of organic molecules in water. This leads not only to high photocatalytic performance of the hybrid material for the degradation of organic dyes in water, but also for efficient photocatalysis in solvent-free and solid state. Furthermore, the reusability, stability and easy recovery of the hybrid material offers promising metal-free heterogeneous photocatalyst for broader applications in different reaction media.     

为孩子营造美好城市

正毫无疑问,21世纪是城市化的世纪。与此同时,人们越来越认识到,城市化进程不但没有使与经济发展相关的个体生态足迹最小化,反而加剧了这种增长。由于不可持续的城市化进程,地球正处于崩塌的边缘。此外,"人口增长是主要问题,计划生育是拯救我们所居住星球的一剂良方",这一观点的全球语境正在缩小。在城市化的世界背景和老龄化社会的实情之下,呼吁建设儿童友好型的城市很有难度。2018年笔者为联合国儿童基金会撰写了《儿童友好型城市规划手册》(下文简称《手册》)~([1]),这篇文章是基于手册中提出的原则、概念和建议发展     

法国国家图书馆,巴黎,法国

正一个为巴黎而建的广场,一座为法国而建的图书馆这座图书馆是一座缘起之地,而不是一半寺庙一半超市的庞然巨物——请参考巴黎东区。图书馆的所在地位于塞纳河沿岸,是协和广场、战神广场和荣誉军人院等一系列连续场地中的一块。塞纳河沿岸的场地,是区域活化的决定性因素。第十三区的山岗朝向塞纳河,身后是Porte de Choisy和Porte d'Ivry大厦。法国国家图书馆无私地用自己的影响力和光彩推动了区域性保护与复兴。为了对     

国内冶金动态

N06020中国今年将建成亚洲最大金矿,N06021河南登封开工建设一年产40万t的氧化铝项目,N06022永昌铅锌公司硫磺渣浮选工艺获得成功,N06023青海元石山镍铁矿项目开工,N060242006年宁夏惠冶镁业计划产镁2．5万t.[编者按]     

蓝色鸣鸟的承诺

当我们驾车向西穿过宾西法尼亚州时，大地披着一层冬装。虽然这不是想念蓝色鸣鸟的季节，但我却无法将它从头脑中驱赶。     

High Power Fiber Bundle Array Coupled LDA Module

1 Introduction High power laser diode arrays (LDA) have many advan- tages such as small volume, long working life, high slope efficiency and high optical density, so they have many applications in medical treatment, material pro- cessing, and for the pumping source of solid laser and etc. But unfortunately, the LDA can not be easy to use directly in these fields because of their poor beam quality and extremely asymmetric divergent beams (!x≈ 5°～10°and !y≈20°～35°, for example), so it …