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阿秒电子显微技术

中国科学:物理学、力学、天文学 2025年第1期55卷 118-126页

作者：张曼玉赵立功惠丹丹付玉喜中国科学院西安光学精密机械研究所超快光科学与技术重点实验室西安710000 中国科学院西安光学精密机械研究所阿秒科学与技术研究中心西安710000 中国科学院大学北京100049

为了实现对物质内部微观粒子运动过程的直接可视化,研究人员不断探索具有更高时间与空间分辨率的新实验方法与技术.阿秒电子显微技术结合超短光脉冲与电子脉冲,基于泵浦-探测方案,旨在同时提供阿秒时间分辨率与原子级空间分辨率,从而为... 详细信息

为了实现对物质内部微观粒子运动过程的直接可视化,研究人员不断探索具有更高时间与空间分辨率的新实验方法与技术.阿秒电子显微技术结合超短光脉冲与电子脉冲,基于泵浦-探测方案,旨在同时提供阿秒时间分辨率与原子级空间分辨率,从而为深入理解物质微观机理和动力学规律提供关键实验参数和技术手段,进而实现物质宏观属性与微观底层运动的有效融合.阿秒电子显微技术自诞生之日起便成为国际上的研究热点,本文将简要介绍超快电子显微镜、阿秒电子脉冲的产生及阿秒电子显微技术的前沿研究进展.

关键词：光场选通阿秒电子脉冲超快电子显微镜阿秒电子显微镜

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黄连温胆汤合酸枣仁汤治疗阵发性心房颤动的效果评价

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辽宁中医杂志 2025年第2期52卷 61-65页

作者：翟文超范红玲张会超张曼宇河南中医药大学河南郑州450002 河南省中医院河南郑州450002 荥阳市中医院河南郑州450199

目的评价黄连温胆汤合酸枣仁汤治疗阵发性心房颤动的效果。方法选取该院2019年5月-2023年2月120例阵发性心房颤动患者随机数字表法分为对照组(60例,基础治疗+标准化西药治疗)和观察组(60例,基础治疗+标准化西药治疗+黄连温胆汤合酸枣仁... 详细信息

目的评价黄连温胆汤合酸枣仁汤治疗阵发性心房颤动的效果。方法选取该院2019年5月-2023年2月120例阵发性心房颤动患者随机数字表法分为对照组(60例,基础治疗+标准化西药治疗)和观察组(60例,基础治疗+标准化西药治疗+黄连温胆汤合酸枣仁汤),持续治疗4周,比较两组各项指标。结果治疗4周后观察组临床总有效率高于对照组;各项中医证候积分、24 h动态心电图平均心室率、发作次数、血清α-羟丁酸脱氢酶(alpha hydroxybutyrate dehydrogenase,α-HBDH)、肌酸激酶(creatine kinase,CK)、肌酸激酶同工酶(creatine kinase isoenzyme,CK-MB)及血浆N末端B兴利钠肽前体(N-terminal pro natriuretic peptide,NT-proBNP)、醛固酮(aldosterone,Ald)水平低于对照组;房颤持续时间、左心室舒张末期内径(left ventricular end diastolic diameter,LVEDD)、左心室收缩末期内径(left ventricular end systolic diameter,LVESD)水平均短于对照组;LVEF水平高于对照组,6 min步行距离(6-minute walking distance,6-MWD)长于对照组,差异有统计学意义(P<0.05)。结论黄连温胆汤合酸枣仁汤治疗阵发性心房颤动效果较好,可有效改善患者临床症状,减少心肌损伤,改善心脏功能,且安全性良好。

关键词：阵发性心房颤动黄连温胆汤酸枣仁汤临床疗效中医证候安全性醛固酮肌酸激酶

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面向太空制造的复合材料3D打印与回收利用

上海航天(中英文) 2025年第01期42卷 20-28页

作者：田小永刘腾飞张曼玉李涤尘西安交通大学精密微纳制造技术全国重点实验室

面向太空制造资源紧缺问题，提出了两种基于连续纤维3D打印的复合材料回收再利用技术。利用碳纤维复合材料逆向熔融抽丝方法，实现碳纤维增强聚醚醚酮（CF/PEEK）预浸丝回收。提出聚苯硫醚（PPS）自增强复合材料过冷3D打印工艺，实现自... 详细信息

面向太空制造资源紧缺问题，提出了两种基于连续纤维3D打印的复合材料回收再利用技术。利用碳纤维复合材料逆向熔融抽丝方法，实现碳纤维增强聚醚醚酮（CF/PEEK）预浸丝回收。提出聚苯硫醚（PPS）自增强复合材料过冷3D打印工艺，实现自增强复合材料成形与回收再利用。研究了回收前后材料微观结构、力学性能的演变规律，回收预浸丝再次打印获得CF/PEEK试样，其弯曲强度和模量较原始复合材料分别提升4.8%和50.8%,PPS自增强复合材料回收再次打印后相比原始PPS材料直接打印，试样弯曲应变提高了13.8%，韧性显著提升，实现非降级回收。探讨了面向太空制造的3D打印复合材料全生命周期回收再利用策略，为未来太空制造发展提供支撑。

关键词：太空制造 3D打印复合材料连续纤维自增强回收再利用

Behaviors of Leucine and Isoleucine in Ion Mobility- Quadrupole Time of Flight Mass Spectrometry

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Chinese Journal of Chemistry 2015年第12期33卷 1359-1364页

作者： Su Guo Fang zhang Haoyang Wang manyu zhang Zhixu zhang Xiang zhang Yinlong Guo National Center for Organic Mass Spectrometry in Shanghai Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China Agilent Technologies (China) CO. Ltd. 1350 North Sichuan Road Shanghai 200080 China Department of Chemistry Fudan University 220 Handan Road Shanghai 200433 China School of Food Science and Biotechnology Zhejiang Gongshang University Hangzhou Zhejiang 310018 China

In this study, ion mobility separation coupled with tandem mass spectrometry （IM-tandem MS） was utilized to investigate the ionization behaviors of two amino acids including leucine and isoleucine. Under the electrospray ionization （ESI） mode, two protonation sites in each molecular sturcture caused two forms of protomer. One arose from the amino being protonated （amino-protomer） and the other from the carboxyl being protonated （car- boxyl-protomer）. In the two-dimensional （drift time, m/z） spectrum, the protomers had the same mass, but the dis- tinguishable drift times and fragmentation patterns. For the characterization purpose, the theoretical collision cross section （CCS） values of the protomers were calculated and proven to be consistent with the experimental. Moreover, the quantified relationship between the amino acids and their protomers was evaluated. It showed that the abun- dance of the carboxyl-protomer was proportional to the concentration of the amino acid, whereas that of the amino- protomer did not have the same trend. Under the atmospheric pressure chemical ionization （APCI） mode, only the carboxyl-protomer was observed. In addition, the amino-protomer and the cluster ions observed under ESI were absent completely. The results demonstrate that the ionization mode impacts heavily on the ionization behaviors of leucine and isoleucine not only on the form of therir protomers but also On the quantified relationship.

关键词： leucine isoleucine IM-tandem MS ESI APCI

Song variation of a native songbird in a modified habitat by invasive plant

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Integrative Zoology 2022年第1期17卷 93-104页

作者： Pan CHEN Taiyu CHEN Bin LIU manyu zhang Changhu LU College of Biology and the Environment Nanjing Forestry UniversityNanjingChina School of Ecology and Environment Anhui Normal UniversityChina

Habitat structure has been considered as an important factor affecting the acoustic evolution of birds,and bird songs are increasingly affected by artificial environmental *** plants sometimes can dramatically alter native habitats,but the song variation of native songbirds migrating into invaded habitats has received little *** invasion of smooth cordgrass Spartina alterniflora in the coastal wetlands of eastern China has drastically altered the vegetation structure and some small passerines have begun to use invaded habitats to *** this study,we compared the song type prevalence and the song characteristics of male plain prinia Prinia inornata to identify differences in vocal behavior between native and invaded *** also tested for differences in vocal behavior in relation to singing perch and wind speed variation between different *** results indicated that males of plain prinia in invaded habitats sang shorter songs than those in native habitats and had a lower song *** homogeneous vegetation structure and higher wind speed in invaded habitats likely leads to males changing the traditional perched singing *** song variation may be related to the founder effect,the alteration of vegetation structure and microclimate in invaded *** finding highlights the need for better understanding the behavioral evolution of native species in the process of adapting to the invaded *** the future,experimental manipulation is needed to ascertain how the invasive plant drove these vocal behavior changes of native songbirds.

关键词： behavioral evolution biological invasion plain prinia smooth cordgrass song diversity

不同时期高危新生儿照顾者需求变化的纵向质性研究

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护理学杂志 2025年第1期40卷 41-46页

作者：王一新杨丽娟张曼玉张娜娜许栋徐兵蔡荣兰王茜蚌埠医科大学护理学院安徽蚌埠233030 蚌埠医科大学第一附属医院新生儿科蚌埠医科大学第一附属医院心内科

目的了解高危新生儿照顾者在高危新生儿入院至出院后回归家庭期间不同时期的照顾需求变化,为制订高危新生儿照顾者出院准备干预方案提供参考。方法通过目的抽样法,选择14名高危新生儿照顾者进行3次半结构化访谈。访谈时间分别为高危新... 详细信息

目的了解高危新生儿照顾者在高危新生儿入院至出院后回归家庭期间不同时期的照顾需求变化,为制订高危新生儿照顾者出院准备干预方案提供参考。方法通过目的抽样法,选择14名高危新生儿照顾者进行3次半结构化访谈。访谈时间分别为高危新生儿入院3 d内、出院时、出院后1个月。采用纵向质性研究的方法,每次访谈完成后运用Smith解释现象学分析方法对资料进行共时分析,待全部资料收集完成后,再进行整体纵向历时分析。结果资料归纳后提取出3个主题8个亚主题,即入院期知晓患儿信息及情感联结的需求(母乳喂养的信息需求、知晓疾病进展的信息需求、建立情感联结的需求)、出院准备期延续性护理服务需求(线上平台沟通的需求、奶粉选择及用药指导的需求、特殊检查指导的需求)、回归家庭期照顾支持的需求(专业照顾信息支持的需求、家庭社会支持的需求)。结论高危新生儿照顾者的需求呈动态变化,医护人员应根据照顾者不同时期的需求,制订针对性的高危新生儿照顾者出院准备干预方案。

关键词：高危新生儿早产儿照顾者照护需求出院准备家庭护理纵向质性研究

Decreased soil pH weakens the positive rhizosphere effect on denitrification capacity

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Pedosphere 2024年第5期34卷 905-915页

作者： Jun WANG Zongxiang zhang Fei LIANG Zhao CHE Yongkang WEN manyu zhang Wenjun JIN Zhaorong DONG He SONG College of Agronomy Anhui Agricultural UniversityHefei 230036China Key Laboratory of Arable Land Quality Monitoring and Evaluation Ministry of Agriculture and Rural AffairsInstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural Sciences(CAAS)Beijing 100081China College of Resources and Environmental Sciences China Agricultural UniversityBeijing 100193China

The stimulating effect of rhizosphere on denitrification is considered to be an unavoidable loss of soil nitrogen(N)and detrimental to crop N use efficiency,which is regulated by crop growth and soil *** acidification,occurring rapidly in many intensive farming lands,affects both crop growth and soil properties,thereby altering rhizosphere effect on ***,the mechanism by which soil acidification regulates rhizosphere denitrification still remains ***,we determined the denitrification capacity(DC)and associated community compositions of nirK-and nirS-type denitrifiers in maize rhizosphere and bulk soils at four acidity gradients(pH=6.8,6.1,5.2,and 4.2).Results showed that the stimulating effect of rhizosphere on DC strongly depended on soil *** to bulk soil,rhizosphere soil had significantly higher DC at pH 5.2,but not at pH of *** increasing soil acidity,the stimulation of rhizosphere on DC(calculated as the difference in DC between rhizosphere and bulk soils)decreased from 8.01 to 0.01 mg N ***,soil acidification significantly reduced the differences in dissolved organic carbon(DOC)and abundance of key nirK-type denitrifier taxa between rhizosphere and bulk soils,both of which were positively related to the stimulation of rhizosphere on *** findings demonstrated that soil acidification could weaken the positive rhizosphere effect on denitrification via regulated C availability and associated nirK-type denitrifier community,potentially reducing N loss risk in rhizosphere *** independent role of soil p H should be fully considered when modelling N behaviour in plant-soil systems.

关键词： bacterial abundance denitrifier community dissolved organic carbon operational taxonomic unit soil acidification

Vinous-throated parrotbills breed in invasive smooth cordgrass habitat:Can native birds avoid the potential ecological trap?

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Avian Research 2023年第3期14卷 369-376页

作者： Pan Chen Yanhong Chen Huimin Chen Taiyu Chen Bin Liu manyu zhang Silu Wang Changhu Lu Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources College of Life SciencesAnhui Normal UniversityWuhu241000China College of Biology and Environment Nanjing Forestry UniversityNanjing210037China

Native animals are facing long-term coexistence with invasive plants worldwide,the impacts of which on animal behavior remain poorly *** ecological traps could threaten native birds breeding in invasive plant habitats,but behavioral strategies for birds to avoid such risks are few *** invasion of Smooth Cordgrass(Spartina alterniflra) has seriously varied the vegetation landscape in the coastal wetlands of eastern China,and affected the habitat selection of native ***,we investigated the nesting and breeding characteristics of a common native passerine,the Vinous-throated Parrotbill(Sinosuthora webbiana),in habitats dominated by native Common Reed(Phragmites australis) and exotic *** found that parrotbills could complete their breeding cycle in cordgrass *** nest failure was attributed to predation in native habitat but tide inundation in cordgrass ***,the nest success rate and daily survival rate(DSR) in cordgrass habitat were ***,nest height was markedly higher in cordgrass habitat and was the most important influencing variable(positively correlated with the DSR).These results suggest that cordgrass habitat is a potential ecological trap due to the tide inundation,but some parrotbills seem to effectively avoid this risk by increasing nest *** study reveals that a native passerine changes its nesting behavior to accommodate invasive plant habitat and highlights that habitat changes caused by invasive plants may drive the adaptive evolution of native animal *** limitation of these results must be acknowledged for the small sample size,and there is a need for a larger sample and long-term data for further verification.

关键词： Adaptive evolution Behavioral plasticity Nesting behavior Sinosuthora webbiana Spartina alterniflora

The Mid-Term Model Forecast Test of North China Rainstorm from July 19th to 20th, 2016

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Journal of Geoscience and Environment Protection 2017年第8期5卷 166-180页

作者： Xiakun zhang Qiqi Liu manyu zhang National Meteorological Center of CMA Beijing China College of Atmospheric Sciences Nanjing University of Information Science & Technology Nanjing China School of Geography and Remote Sensing Nanjing University of Information Science & Technology Nanjing China

Heavy rain is a kind of severe weather, often causing floods and serious soil erosion, leading to engineering losses, embankment rupture and crop flooding and other significant economic losses. Especially for some low-lying terrain areas, rainwater cannot quickly vent caused by farm water and soil moisture being too saturated, so it will cause more geological disasters. This article combines live and forecast data, aiming at the results of the mid-rainstorm forecast in North China during the period of 7.19-2016, and compares with the actual situation of rainstorm. We carry out the mid-term forecast of the rainstorm. The atmosphere is a kind of medium with various fluctuation phenomena, and its physical properties and changes are studied by the analysis of volatility which is an important research method. It is important to improve the accuracy of such severe weather forecasting rainstorms and to take precautionary measures in a timely manner to minimize the losses caused by rainstorms.

关键词： Heavy Rain North China Medium-Term Model Forecast Test