The number of novel coronavirus disease (COVID-19) patients in Africa exceeded 158,000 as of June 3. Although the continent accounts for only a small propor-ti
With the intational community now facing the dual challenges of containing the novel coronavirus disease (COVID-19) pandemic and restoring the economy and socia
China issued a guideline on May 18 to improve its socialist market economic system through market-oriented reforms and high-level opening up to drive high-quali
凹凸棒土具有出色的吸附性、分散性,在各个领域有着广泛的应用。自然界中凹凸棒土常与白云石、二氧化硅等矿物共生。浮选法是一种常用的选矿方法,通过分段浮选能够有效提纯凹凸
紫外光电探测器以其尺寸小、能耗低和灵敏度高等优点已成为光电探测器的研究热点。作为一种典型的多功能氧化物半导体,SnO2具有优良的气敏性和光学特性,被广泛的应用到气体传
水体Cr(Ⅵ)、Cu(II)污染问题一直是国内外很多学者研究的焦点,也研发了多种方法对含Cr(Ⅵ)、Cu(II)重金属废水和污染的水体进行处理和修复,其中吸附是最常用的方法之一。随着纳
The National Art Museum of China (NAMOC) in Beijing reopened on May 13 with a daily cap of 500 visitors. The reopening is marked by a new exhibition that was or