以沼液为原料的微生物燃料电池产电降解特性

为提高生物质能源利用效率，降低废水处理成本，实验构建单室无膜空气阴极微生物燃料电池（microbial fuel cell，MFC），碳布作为阴阳极材料，将牛粪沼液作为接种液及底物进行产电性能测试，同时考察了MFC对该沼液的降解效果。结果表明，MFC能够利用沼液进行产电，最高输出电压330 mV，内阻10 kΩ，最大功率密度为10.98 mW·m^-2，沼液中的不可溶性物质是导致MFC输出电压、功率密度低的重要原因。MFC的运行对沼液中的有机物、氮、磷等物质具有一定的降解能力，24 h内去除率分别达到20.73%、67.82%、72.56%。因此，MFC作为产生电能的新方法，在联合处理沼液等有机废水节能减排方面具有广阔前景

Ｒelationship between theory of mind and local brain functional connectivity children with autism spectrum disorder

目的:探讨孤独症谱系障碍(ASD)儿童心理推理能力(ToM)与局部脑功能连接的关系。方法:选取符合DSM-5诊断标准的6～18岁ASD儿童39例和年龄、性别及智商相匹配的正常儿童43例,进行ToM任务测查和静息态磁共振成像扫描,比较两组ToM通过率/得分和全脑局部一致性(ReHo)缺陷的脑机制值,并采用偏相关方法分析两组间存在差异的ToM通过率/得分和ReHo值之间的关系。结果:ASD组显性错误信念、一级错误信念通过率和表情识别任务得分低于正常对照组(均P&lt;0.05);右额上回局部ReHo值高于正常对照组,右距状沟、左内侧额叶皮层区域ReHo值低于正常对照组(GRF校正,体素P&lt;0.001,团块P&lt;0.05)。结论:ASD患者存在ToM缺陷和局部一致性异常,其中显性错误信念与左内侧额叶皮层局部功能连接相关。</p

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

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies