Study on antibacterial performance of nano ZnO and ZnO loaded zeolite

Nano ZnO and ZnO loaded zeolite complexes were prepared by uniformity deposition method and charateried by XRD,BET and the evaluation of antibacterial performance.The results showed ZnO calcined at 300℃ has the best antibacterial performance.The zeolite loaded nano ZnO has good antibacterial performance and the mixture,zeolite:ZnO=3∶1,has the best antibacterial performance

Single-Layer Oxygen Deficiency δ-MnO2 for Electrochemical CO2 Reduction

电催化还原二氧化碳成多碳燃料一直是研究的热点. 而找到活性高，选择性优，稳定性好的催化剂一直是研究者们奋斗的目标. 二氧化锰因其独特的物理和化学性质被广泛的应用于电催化领域，而缺陷的调控可以改变催化剂的电子性质，在此次工作中作者系统地研究了在有氧缺陷和没有氧缺陷的二维二氧化锰上的电催化二氧化碳还原反应. 通过利用自旋极化密度泛函理论，作者分别计算了他们的电子性质和分子在吸附过程中的能量值. 结果显示，缺陷的引入改变了二氧化锰的特性，使其从半导体性质变为半金属性质，从而提高催化剂的导电性. 同时，分析能量图也很容易发现对应产品的选择性也发生了变化. 二氧化锰有利于甲酸的产生，而氧缺陷的二氧化锰更有利于一氧化碳的生成. 本研究将为二氧化碳还原的其他非贵金属氧化物催化剂的结构设计和优化提供一定的指导.   Manganese dioxide (MnO2) has been widely used in catalysis. In addition, since the defect engineering can change the electronic properties of the catalyst, here we have systematically studied electrocatalytic carbon dioxide reduction reaction (CO2RR) on δ-MnO2 with and without oxygen deficiency, denoted as Ov-MnO2 and MnO2, respectively. We calculate the electronic properties and the intermediate of free energy for MnO2 and Ov-MnO2 with the help of spin-polarized density functional theory. By analyzing this result, we can find that the introduction of defects change the δ-MnO2 from semiconducting properties to semi-metallic properties, leading to the improved conductivity. At the same time, the selectivity of the product has also been changed. MnO2 and Ov-MnO2 are more conducive to the productions of formic acid (HCOOH) and carbon monoxide (CO), respectively. Strikingly, this study will provide guidance in the structural design and optimization of other non-noble metal oxides catalysts for CO2RR.  This work was supported by the National Natural Science Foundation of China (Grant No. 51302079 and U1510103), and the Natural Science Foundation of Hunan Province (Grant No. 2017JJ1008).作者联系地址：(1. 湖南大学物理与微电子科学学院，湖南 长沙 410082； 2. 山西大学分子科学研究所， 山西省能源转化和存储材料重点实验室， 山西 太原 030006； 3. 西安科技大学先进电化学能源学院， 陕西 西安 710048； 4. 长沙秀曦科技公司材料数据中心， 湖南 长沙 410082)Author's Address: 1. School of Physics and Electronics, Hunan University, Changsha 410082, China; 2. Institute of  Molecular Science, Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province, Shanxi University, Taiyuan 030006, China; 3. Institute of Advanced Electrochemical Energy, Xi’an University of Technology, Xi’an 710048, Shaanxi, China; 4. Material Data Centre, Changsha Xiuxi Technology Co. Ltd., Changsha 410082, China通讯作者E-mail：[email protected]

Functional connectivity characteristics of executive control network in patients with high-functioning autism aged 6 - 18 years

目的:探讨6~18岁高功能孤独症患者执行网络功能连接特点、年龄组差别及与孤独症症状的相关。方法:纳入44例6~18岁符合DSM-IV孤独症诊断标准的高功能患者及年龄、性别、智商组间匹配的31例正常对照,根据年龄将每组被试分为儿童期(6~12岁)和青春期(12~18岁)两组。选取左右侧后顶叶皮层及背外侧前额叶4个执行网络的核心脑区为种子点,计算其与全脑的功能连接。采用偏相关分析计算异常脑区功能连接与孤独症谱系障碍筛查问卷评分的相关。结果:孤独症组rdl PFC与左侧额上回/额中回/前扣带回的功能连接高于正常对照组(P <0. 05),该脑区功能连接同时呈现组别-年龄交互效应,在儿童期孤独症组高于正常对照组,在青春期低于正常对照组(均P <0. 05)。且该异常功能连接与重复刻板行为及交流问题呈负相关(r=-0. 50~-0. 45)(均P <0. 05)。结论:6~18岁高功能孤独症患者的执行网络存在过度连接特点及年龄组别差异,与重复刻板及交流症状相关

Functional connectivity difference of theory of mind related brain regions in different age groups of individuals with autism aged 6-18 years old

目的:分析社会认知中心理推理能力(ToM)相关重要脑区与其他脑区功能连接的随年龄发育模式,探讨孤独症核心症状社会交往障碍的脑机制。方法:43例6～18岁符合美国精神障碍诊断与统计手册第4版孤独症诊断标准的患者及年龄、性别组间匹配的39例正常对照,选取背内侧前额叶(dMPFC)、左侧颞顶联合(1TPJ)、右侧颞顶联合(rTPJ)和右侧颞上沟(rSTS) 4个ToM相关的重要脑区,计算其与全脑体素之间的功能连接,通过单变量方差分析探索感兴趣区域的功能连接在被试中的组别及年龄交互作用;并将被试根据年龄分为儿童期(6.0～11. 9岁)和青春期(12.0～18.0岁),探讨不同年龄段的组间差异。结果:rTPJ与右侧缘上回及左侧顶下小叶的功能连接、rSTS与双侧额上/中回的功能连接均呈现出组别与年龄的交互作用(校正后P <0.05);而青春期,rTPJ和rSTS存在显著交互效应的功能连接均小于正常对照组(均