共查询到20条相似文献,搜索用时 89 毫秒
1.
以《化学教育》为研究对象,对近20年的载文进行信息可视化分析,通过绘制关键词共现知识图谱以及关键词时区图,分析并展现2000年以来我国中学化学教育的研究脉络,从整体上把握其研究热点和发展趋势,为后续化学教育的研究和实践提供一些有益的参考。 相似文献
2.
1999年美国总统绿色化学挑战奖研究工作介绍 总被引:18,自引:0,他引:18
总统绿色化学挑战奖是1995年由美国总统克林顿发起的,1996年第1次授奖,今年是第4届年度授奖.该奖共分为5项,即:小企业奖,学术奖,设计安全化学品奖,更新合成路线奖和改进溶剂和反应条件奖. 相似文献
4.
5.
《理化检验(化学分册)》2014,(3):337
为了倡导环保理念,保护森林,节约纸张,希望广大读者踊跃订阅电子期刊,支持环保事业,共同携手创造绿色发展的明天!本刊采用PDF格式用Email形式发送,读者保存方便不占空间,可方便打印某篇文章或某一页,订阅费用低,全年订阅比邮购费用低一半,且比邮局发行快10天左右。如需订 相似文献
6.
《理化检验(化学分册)》2014,(4):517
为了倡导环保理念,保护森林,节约纸张,希望广大读者踊跃订阅电子期刊,支持环保事业,共同携手创造绿色发展的明天!本刊采用PDF格式用Email形式发送,读者保存方便不占空间,可方便打印某篇文章或某一页,订阅费用低,全年订阅比邮购费用低一半,且比邮局发行快10天左右。如需订 相似文献
7.
《理化检验(化学分册)》2013,(11):1311
为了倡导环保理念,保护森林,节约纸张,希望广大读者踊跃订阅电子期刊,支持环保事业,共同携手创造绿色发展的明天!本刊采用PDF格式用E-mail形式发送,读者保存方便不占空间,可方便打印某篇文章或某一页,订阅费用低,全年订阅比邮购费用低一半,且比邮局发行快10天左右。 相似文献
8.
《理化检验(化学分册)》2014,(5):568
为了倡导环保理念,保护森林,节约纸张,希望广大读者踊跃订阅电子期刊,支持环保事业,共同携手创造绿色发展的明天!本刊采用PDF格式用Email形式发送,读者保存方便不占空间,可方便打印某篇文章或某一页,订阅费用低,全年订阅比邮购费用低一半,且比邮局发行快10天左右。如需订 相似文献
9.
《理化检验(化学分册)》2014,(1):129
<正>为了倡导环保理念,保护森林,节约纸张,希望广大读者踊跃订阅电子期刊,支持环保事业,共同携手创造绿色发展的明天!本刊采用PDF格式用Email形式发送,读者保存方便不占空间,可方便打印某篇文章或某一页,订阅费用低,全年订阅比邮购 相似文献
10.
《理化检验(化学分册)》2014,(9):1179
为了倡导环保理念,保护森林,节约纸张,希望广大读者踊跃订阅电子期刊,支持环保事业,共同携手创造绿色发展的明天!本刊采用PDF格式用Email形式发送,读者保存方便不占空间,可方便打印某篇文章或某一页,订阅费用低,全年订阅比邮购费用低一半,且比邮局发行快10天左右。如需订 相似文献
11.
12.
13.
氟碳铈矿提取稀土的绿色化学进展 总被引:15,自引:0,他引:15
氟碳铈矿是稀土工业的重要原材料,目前从氟碳铈矿提取稀土主要采用酸法工艺,该工艺虽然稀土回收高,但流程长,试剂消耗长,成本较高,同时酸法产生HF及废酸碱污染环境。因此寻找低成本,低污染的绿色化学处理工艺是近几十年中人们一直努力的方向。本文系统介绍了氟碳铈矿分解工艺的发展,并着重介绍邓氯化铵法提取氟碳铈矿稀土的的新工艺。该工艺采用盐类分解并氯化氟碳铈矿,直接用水浸取回收稀土,不引入酸和碱,提高了反应选择性,减轻了稀土在稀土杂质分负荷,降低了化工材料消耗,简化了工艺,提高了回收率,是符合绿色化学要求的工艺。 相似文献
14.
15.
16.
17.
Green analytical chemistry is a comprehensive perspective that aims to reduce or eliminate the toxic and harmful solvents, reagents, and techniques in the preparation, pre-treatment, and determination steps of an analysis process. With the increase in environmental pollution in recent years, awareness has been increasing in terms of both the contamination analysis of environmental sources and the more environmentally friendly analysis methods. This review evaluates the solvents such as bio-based solvents and deep eutectic solvents, nanomaterials synthesized by non-toxic methods, the greener changes in the extraction methods, and chromatographic techniques considering the most recent studies. In particular, trying to make the methods used to analyze environmental samples safer and less toxic is an important point that overlaps with the green approach, which aims to minimize environmental pollution. In this context, this review provides information on green analytical chemistry-based environmental applications covering the last ten years so that the applications of this approach can be examined and understood in more detail and can be applied by other researchers. 相似文献
18.
19.
Zirconium-based metal-organic framework materials (Zr−MOFs) have more practical usage over most conventional benchmark porous materials and even many other MOFs due to the excellent structural stability, rich coordination forms, and various active sites. However, their mass-production and application are restricted by the high-cost raw materials, complex synthesis procedures, harsh reaction conditions, and unexpected environmental impact. Based on the principles of “Green Chemistry”, considerable efforts have been done for breaking through the limitations, and significant progress has been made in the sustainable synthesis of Zr−MOFs over the past decade. In this review, the advancements of green raw materials and green synthesis methods in the synthesis of Zr−MOFs are reviewed, along with the corresponding drawbacks. The challenges and prospects are discussed and outlooked, expecting to provide guidance for the acceleration of the industrialization and commercialization of Zr−MOFs. 相似文献
20.
Mohamed A. Ibrahim Mohamed Elagawany Tarek S. Ibrahim 《Green Chemistry Letters and Reviews》2016,9(2):91-95
A greener protocol for the synthesis of olsalazine analogs is reported. Olsalazine analogs are prepared in high yields by a one-pot reaction of two molecules of mesalazine with benzotriazole-activated aspartic acid and glutamic acid in water under microwave irradiation. 相似文献