古诗里的中华瑰宝之光揭秘

通过借用《华夏诗词藏瑰宝》节目,将脍炙人口的古诗词与化学科学相结合,采用拟人化的方式演绎并讲述诗词中具有神秘光彩的中华瑰宝,揭秘它们发光背后的故事,使读者在趣味阅读中认识这些瑰宝的珍贵之处及蕴含的化学知识。

分析化学实验的绿色化及废液处理

分析化学实验过程中使用的试剂用量大,产生的废液较多,会对环境造成较大污染,影响教师和学生的身体健康。因此,分析化学实验的绿色化及废液的绿色化处理具有重要意义。以湖南师范大学化学化工国家级实验教学示范中心分析化学基础实验为例,采取微型化等方式对分析实验项目进行了绿色化改革,并以资源再利用等方式对分析实验废液进行处理。

Anesthesia Induction’s Effect on Pediatric Surgery under Parental Accompany: A Comprehensive Meta-Analysis of Randomized Controlled Trials

Objective: To evaluate the effect of anesthesia induction under parental company for children receiving general anesthesia. Methods: The RCT results were collected on children’s preoperative anxiety, anesthesia coordination, anesthesia and recovery agitation, postoperative pain and parental preoperative anxiety intervention with or without parental accompany using RevMan 5.3 software based on Chinese and English database. We searched Cochrane Library, Pubmed, Medline, EMbase, Sciencedirect, SpringerLink, China Biomedical, CNKI, Wanfang, Weipu and other databases, and included 15 articles (5 Chinese, 10 English) with 1390 samples size, containing 700 cases of control group and 690 cases of testing group. Results: Our results showed that parents’ and children’s anxiety level, the incidence of restlessness during anesthesia induction and wake-up period were reduced, while the anesthesia coordination was enhanced and the pain of children after wake-up was alleviated under parental accompany. Conclusion: The risk and cost-free intervention of parental accompany could be recommended as appropriate in hospitals for its contribution to children’s surgery effect.

真菌反硝化过程及其驱动的N_(2)O产生机制研究进展

真菌反硝化过程的发现打破了反硝化过程只发生在原核生物中的传统认识,是对全球微生物氮循环过程的重要补充。真菌参与的反硝化过程由于缺乏N_(2)O还原酶,其终产物为具有强辐射效应的温室气体N_(2)O。真菌在环境中分布广泛,生物量巨大,故真菌反硝化作用对全球N_(2)O释放通量的贡献是不容忽视的。近年来许多研究表明,真菌反硝化过程是自然环境中N_(2)O产生的重要途径。本文对反硝化真菌的发现、多样性及分布、产生N_(2)O的机制和活性测定方法等几个方面进行综述,并对未来的研究提出展望。