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Impact of soluble organic matter and particulate organic matter on anammox system: Performance, microbial community and N_(2)O production

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Journal of Environmental Sciences 2023年第2期124卷 146-155页

作者： yingying he HongyuMao Jacek Makinia Jakub Drewnowski Bing Wu Jun Xu Li Xie Xi Lu Key Laboratory of Yangtze Water Environment Ministry of EducationTongji UniversityShanghai 200092China Faculty of Civil and Environmental Engineering Gdansk University of TechnologyGdansk 80-233Poland

In this study,the effects of soluble readily biodegradable COD(sCOD)and particulate slowly biodegradable COD(pCOD)on anammox process were *** results of the longterm experiment indicated that a low sCOD/N ratio of 0.5 could accelerate the anammox and denitrification activity,to reach as high as 84.9%±2.8%TN removal *** denitrification-anammox(PDN/anammox)and denitrification were proposed as the major pathways for nitrogen removal,accounting for 91.3% and 8.7% of the TN removal,*** bacteria could remain active with high abundance of anammox genes to maintain its *** Kuenenia and Thauera were the predominant genera in the presence of organic *** with sCOD,batch experiments showed that the introduction of pCOD had a negative effect on nitrogen *** contribution of denitrification to nitrogen removal decreased from approximately 14%to 3% with increasing percentage of *** addition,the analysis result of the process data using an optimized ASM1 model indicated that high percentage of pCOD resulted in serious N_(2)O emission(the peak value up to 0.25mg N/L),whichwas likely due to limited mass diffusion and insufficient available carbon sources for ***,a high sCOD/N ratio was beneficial for alleviating N_(2)O accumulation.

关键词： Anammox Partial denitrification Microbial community structure Carbon composition Nitrous oxide production

Effects of Sc content on the mechanical properties of Al-Sc alloys

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Rare Metals 2010年第5期29卷 451-455页

作者： SUN yingying,SONG Min,and he Yuehui State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China State Key Laboratory of Powder Metallurgy Central South University Changsha China

The effects of Sc content on the mechanical properties of Al-Sc alloys were investigated. The results show that the strengths of all the tested alloys with 0.1 wt.%, 0.3 wt.%, and 0.4 wt.% Sc additions increase initially with an increase in annealing time, due to the increase in volume fraction and size and the decrease in particle interspacing of Al3Sc particles. After reaching peak values, the strengths of all the tested alloys start to decrease with increasing annealing time due to the coarsening and increase in particle interspacing of At3Sc particles. It has also been shown that the alloy with 0.3 wt.% Sc has a higher strength and a lower elongation than the alloys with 0.1 wt.% and 0.4 wt.% Sc. The increase in strength and the decrease in elongation of the alloy with 0.3 wt.% Sc are due to the smaller particle interspacing of Al3Sc particles, resulting in a strong inhibition of dislocation movement during deformation.

关键词： aluminum alloys scandium mechanical properties microstructure

Variation of phytoplankton community before an induced cyanobacterial(Arthrospira platensis) bloom

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Journal of Environmental Sciences 2009年第12期21卷 1632-1638页

作者： WANG Chong, HUANG yingying, he Shengbing, LIN Yan, WANG Xinze, KONG Hainan School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China. [a] School of Environmental Science Engineering Shanghai Jiao Tong University Shanghai 200240 China

A cyanobacterial （Arthrospira platensis） bloom was induced in situ by nutrient manipulation in an enclosure. The succession of the phytoplankton community and the water chemistry variations before the appearance of bloom, as well as their relationship, were investigated. The cell pigment variations were studied simultaneously. The Pearson＇s correlation analysis showed that there was no significant correlation between water chemistry and green algal or cyanobacterial composition, indicating that water chemistry variations were not suitable to be used as indicators for cyanobacterial-bloom early-warning. However, the diversity index of the phytoplankton community decreased sharply before the bloom appeared. Therefore, the dynamics of phytoplankton community was put forward to be an indicator for cyanobacterial-bloom early-warning. In addition, the cell pigment variations represented the changes of community structure, which should be useful for studying the dynamics of phytoplankton community.

关键词： bloom cyanobacteria community pigments early-warning

Size-and leaf age-dependent effects on the photosynthetic and physiological responses of Artemisia ordosica to drought stress

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Journal of Arid Land 2021年第7期13卷 744-758页

作者： WANG Chunyuan YU Minghan DING Guodong GAO Guanglei ZHANG Linlin he yingying LIU Wei Yanchi Research Station School of Soil and Water ConservationBeijing Forestry UniversityBeijing 100083China Key Laboratory of State Forestry Administration on Soil and Water Conservation Beijing Forestry UniversityBeijing 100083China

Drought is one of the most significant natural disasters in the arid and semi-arid areas of *** or plant organs often differ in their responses to drought and other adversities at different growth *** present,little is known about the size-and leaf age-dependent differences in the mechanisms of shrub-related drought resistance in the deserts of ***,we evaluated the photosynthetic and physiological responses of Artemisia ordosica *** drought stress using a field experiment in Mu Us Sandy Land,Ningxia Hui Autonomous Region,China in *** was manipulated by installing outdoor shelters,with four rainfall treatments applied to 12 plots(5 m×5 m).There were four rainfall levels,including a control and rainfall reductions of 30%,50%and 70%,each with three *** individual crown size as the dividing basis,we measured the responses of *** photosynthetic and physiological responses to drought at different growth stages,i.e.,large-sized(>0.5 m^(2))and small-sized(≤0.5 m^(2))*** leaves of *** were divided into old leaves and young leaves for separate *** showed that:(1)under drought stress,the transfer efficiency of light energy captured by antenna pigments to the photosystem II(PSII)reaction center decreased,and the heat dissipation capacity increased *** resist the photosynthetic system damage caused by drought,*** enhanced its free radical scavenging capacity by activating its antioxidant enzyme system;and(2)growth stage and leaf age had effects on the reaction of the photosynthetic system to *** *** plants could not withstand severe drought stress(70%rainfall reduction),whereas large *** individuals could absorb deep soil water to ensure their survival in severe drought stressed *** 30%and 50%rainfall reduction conditions,young leaves had a greater ability to resist drought than old leaves,whereas the latter were more resistant

关键词： drought stress age difference plant size photosynthesis physiological response survival strategy

短视频场景化信息服务模式创新的反馈调节模型构建

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现代情报 2022年第12期42卷 138-146页

作者：何莹莹吉林开放大学吉林长春130022

[目的/意义]短视频场景化服务模式创新离不开服务要素集成和场景化情境适配交互作用的发挥,其中,服务要素集成形成服务功效,而情境适配变现场景流量。然而,服务要素集成和场景化情境适配如何交互作用于短视频服务模式创新机理尚不明确,... 详细信息

[目的/意义]短视频场景化服务模式创新离不开服务要素集成和场景化情境适配交互作用的发挥,其中,服务要素集成形成服务功效,而情境适配变现场景流量。然而,服务要素集成和场景化情境适配如何交互作用于短视频服务模式创新机理尚不明确,创新路径亦不清晰,难以指导实践。[方法/过程]本文分别从短视频服务模式要素集成(I)形成产品功能和场景化情境配置适配(@)形成服务效用的双路径视角,构建了短视频场景化服务模式的PSCE@I反馈调节模型,提炼了短视频“服务模式要素集成(产品功能)—流量变现(服务体验)—场景化情境适配(服务效用)”的场景化服务模式创新路径。[结果/结论]结果表明,短视频场景化服务模式创新是通过场景解构现有服务模式,将场景要素融入解构后的服务模式要素之中,通过场景化情境配置实现商业模式创新。

关键词：短视频平台场景化服务模式创新服务模式要素集成适配反馈调节

从日本ODA政策的调整看日本外交战略的变化

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太平洋学报 2004年第12期12卷 88-96页

作者：何英莺上海国际问题研究所日本室

日本政府的ODA作为其重要的外交支柱,一直是日本政府外交战略的重要体现。近年来,日本对其ODA政策做了不少调整。这种调整与其国内外形势的变化是密切相关的,也深刻地反映出日本外交战略的变化。这种变化表现在,对非传统安全威胁的关注... 详细信息

日本政府的ODA作为其重要的外交支柱,一直是日本政府外交战略的重要体现。近年来,日本对其ODA政策做了不少调整。这种调整与其国内外形势的变化是密切相关的,也深刻地反映出日本外交战略的变化。这种变化表现在,对非传统安全威胁的关注上升了, 政治含义增加了,自主性更强了,以及加强了与中国竞争的态势等。尽管在新的政策调整下,日本表示要减少对华援助,但是日本政府提出的一些新方向也为中国争取新的援助项目因开辟中日合作新领域提供了契机。中国不仅可以在政府层面与日本加强在环境、人才交流、技术提供以及预防灾害、传染病等方面的合作,也可以在民间层面加强与日本NGO/NPO的合作,以期通过各种层次的交流与合作,实现中日之间的经济互利与关系改善。

关键词：日本ODA 政策调整日本外交战略中日关系

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新冠肺炎流行期孕产妇的心理应对

中国心理卫生杂志 2020年第3期34卷 259-261页

作者：何萤萤北京大学第六医院北京大学精神卫生研究所国家卫生健康委员会精神卫生学重点实验室(北京大学)国家精神心理疾病临床医学研究中心(北京大学第六医院)北京100083

国家卫健委2月2日印发《关于做好儿童和孕产妇新型冠状病毒感染的肺炎疫情防控工作的通知》中明确,儿童和孕产妇是新型冠状病毒肺炎的易感人群。而是否存在母婴垂直传播,尚不明确。在疫情肆虐的今天,孕产妇这一特殊人群较之其他普通人,... 详细信息

国家卫健委2月2日印发《关于做好儿童和孕产妇新型冠状病毒感染的肺炎疫情防控工作的通知》中明确,儿童和孕产妇是新型冠状病毒肺炎的易感人群。而是否存在母婴垂直传播,尚不明确。在疫情肆虐的今天,孕产妇这一特殊人群较之其他普通人,更显忧心忡忡,更应备受关注和照顾。除了做好自身防护,保证身体健康外,她们的心灵也需要更多呵护。

关键词：新型冠状病毒疫情爆发孕产妇心理

High sensitivity of herbicide-resistant blackgrass to allelopathic wheat suggests a novel method of weed management

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High sensitivity of herbicide-resistant blackgrass to allelo...

中国第九届植物化感作用学术研讨会

作者： YANG Xuefang he yingying SONG Xi’E YUAN Xiangyang SUN Dasheng College of Agriculture Shanxi Agricultural University School of Life Sciences Henan University College of Resources and Environment Shanxi Agricultural University

Despite increasing knowledge of allelopathic wheat interference with blackgrass,relatively little is known about its action on herbicide-resistant *** incidence of herbicide-resistant blackgrass is escalating in wheat *** of the interference of allelopathic wheat with herbicide-resistant blackgrass and the potential mechanisms involved is ***-methyl-resistant and-susceptible blackgrass biotypes were identified and segregated from a putative mesosulfuron-methyl-resistant population occurring in wheat fields in *** wheat inhibited blackgrass roots more than shoots,regardless of *** wheat inhibited roots of resistant blackgrass more than those of the susceptible *** wheat significantly shaped the root behaviour of *** blackgrass caused a lower increase in *** segregation significantly increased inhibition of blackgrass and increased *** exudates from blackgrass induced the production of DIMBOA,but more for the susceptible *** concentration of-(-)loliolide,a potential signal chemical,was much lower in the root exudates from resistant blackgrass than the susceptible *** rice can interfere with the growth of penoxsulam-resistant barnyardgrass through allelochemical-mediated root *** type of allelopathic interference may provide a non-herbicidal alternative for herbicide-resistant weed management in paddy systems.

关键词： allelopathy herbicide resistant root exudates root interaction

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极谱催化波法测定黄连素

分析化学 2000年第12期28卷 1538-1541页

作者：宋俊峰何盈盈过玮西北大学电分析化学研究所!西安710069

基于黄连素在过氧化氢存在下产生的极谱催化波，拟定了测定黄连素的新方法。在８．０×１０－２ｍｏｌ／ＬＮａ２Ｂ４Ｏ７－Ｎａ２ＣＯ３（ｐＨ９．４±０．４）－４．０×１０－３ｍｏｌ／ＬＨ２Ｏ２底液中，催化波峰电流与黄连素浓度... 详细信息

基于黄连素在过氧化氢存在下产生的极谱催化波，拟定了测定黄连素的新方法。在８．０×１０－２ｍｏｌ／ＬＮａ２Ｂ４Ｏ７－Ｎａ２ＣＯ３（ｐＨ９．４±０．４）－４．０×１０－３ｍｏｌ／ＬＨ２Ｏ２底液中，催化波峰电流与黄连素浓度在１．０ × １０－８～３．０ × １０－７ｍｏｌ／Ｌ范围内呈线性关系。催化波的灵敏度比相应黄连素还原波高２５倍。

关键词：黄连素过氧化氢极谱催化波