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Effects of electrochemical oxidation on surface and mechanical properties of dry-jet wet spun carbon fibers

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北京化工大学学报（自然科学版） 2022年第5期49卷 22-29页

作者： ZHAO ZeHua MA Yan SHEN ZhiGang CHEN Liang WANG XiaoXu liu jie College of Materials Science and Engineering Beijing University of Chemical TechnologyBeijing 100029 Institute of Aerospace Materials and Technology Beijing 100076 Shanghai Research Institute of Petrochemical Technology Shanghai 201211China

The surface of dry-jet wet spun carbon fibers(CFs)is relatively smooth compared with those of wet spun CFs,which results in weak interfacial interactions between the fiber and the polymer resin.A surface functionalization treatment is particularly important to unleash the full potential of the superior mechanical properties of dry-jet wet spun CFs.In this study,the effects of electrochemical oxidation treatment time and current density on the surface structures and the mechanical properties of dry-jet wet spun CFs were investigated.The interlaminar shear strength of the CFs improves significantly from 69 to 84 MPa after 120 s of treatment.Further structural analysis reveals that the improvements are due to the addition of oxygen-containing functional groups and the optimization of the morphology on the surface of the CFs.

关键词： carbon fibers dry-jet wet spun electrochemical oxidation interlaminar shear strength

Spatially resolved transcriptomic profiling of placental development in dairy cow

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Zoological Research 2024年第3期45卷 586-600页

作者： Guang-Hui Tan Shi-jie liu Ming-Le Dou De-Feng Zhao Ao Zhang Heng-Kuan Li Fu-Nong Luo Tao Shi Hao-Ping Wang Jing-Yuan Lei Yong Zhang Yu Jiang Yi Zheng Fei Wang Key Laboratory of Animal Genetics Breeding and Reproduction of Shaanxi ProvinceCollege of Animal Science and TechnologyNorthwest A&F UniversityYanglingShaanxi 712100China Key Laboratory of Livestock Biology Northwest A&F UniversityYanglingShaanxi 712100China Key Laboratory of Animal Biotechnology of the Ministry of Agriculture Northwest A&F UniversityYanglingShaanxi 712100China College of Information Engineering Northwest A&F UniversityYanglingShaanxi 712100China

The placenta plays a crucial role in successful mammalian reproduction.Ruminant animals possess a semi-invasive placenta characterized by a highly vascularized structure formed by maternal endometrial caruncles and fetal placental cotyledons,essential for full-term fetal development.The cow placenta harbors at least two trophoblast cell populations:uninucleate(UNC)and binucleate(BNC)cells.However,the limited capacity to elucidate the transcriptomic dynamics of the placental natural environment has resulted in a poor understanding of both the molecular and cellular interactions between trophoblast cells and niches,and the molecular mechanisms governing trophoblast differentiation and functionalization.To fill this knowledge gap,we employed Stereo-seq to map spatial gene expression patterns at near single-cell resolution in the cow placenta at 90 and 130 days of gestation,attaining high-resolution,spatially resolved gene expression profiles.Based on clustering and cell marker gene expression analyses,key transcription factors,including YBX1 and NPAS2,were shown to regulate the heterogeneity of trophoblast cell subpopulations.Cell communication and trajectory analysis provided a framework for understanding cell-cell interactions and the differentiation of trophoblasts into BNCs in the placental microenvironment.Differential analysis of cell trajectories identified a set of genes involved in regulation of trophoblast differentiation.Additionally,spatial modules and co-variant genes that help shape specific tissue structures were identified.Together,these findings provide foundational insights into important biological pathways critical to the placental development and function in cows.

关键词： Spatial transcriptomics Dairy cow Placenta Gestation

论六朝道教养生方的用药特色及价值以《灵宝五符序》卷中与《辅行诀》为中心的考察

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中国道教 2024年第1期 44-51页

作者：刘杰首都师范大学历史学院

六朝时期道教医学发展迅速,涌现出了一大批医药类著作。遗憾的是,这些著作大都散于历史长河之中,保存至今的只是极少部分。仅就今存的六朝道教本草、方剂类著作而言,又可将之分为两类:一类由道士(或与道教相关的人物)汇辑或注释传统中... 详细信息

六朝时期道教医学发展迅速,涌现出了一大批医药类著作。遗憾的是,这些著作大都散于历史长河之中,保存至今的只是极少部分。仅就今存的六朝道教本草、方剂类著作而言,又可将之分为两类:一类由道士(或与道教相关的人物)汇辑或注释传统中医著作而成,如葛洪的《肘后备急方》、陶弘景的《本草经集注》等。此类著作旨在治病防病,其内容兼有道教医学与教外医学两方面内容。另一类则是道教内部产生的、由道士撰写的医药类著作。

关键词：灵宝五符《肘后备急方》六朝道教《本草经集注》道教医学养生方医药类陶弘景

石油化工企业低沸点可燃液体灭火系统存在问题分析与探讨

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炼油技术与工程 2024年第3期54卷 61-64页

作者：刘杰中石化广州工程有限公司广东省广州市510620

低沸点可燃液体大量存在于石油化工企业中,当前国家标准中对于低沸点可燃液体储罐的灭火设计参数无明确规定,采用普通泡沫灭火系统无法起到彻底灭火作用,急需为低沸点可燃液体储罐提供可靠的灭火手段。文章基于现有工程设计及灭火新理论... 详细信息

低沸点可燃液体大量存在于石油化工企业中,当前国家标准中对于低沸点可燃液体储罐的灭火设计参数无明确规定,采用普通泡沫灭火系统无法起到彻底灭火作用,急需为低沸点可燃液体储罐提供可靠的灭火手段。文章基于现有工程设计及灭火新理论,对低沸点可燃液体火灾难以扑救的问题进行了分析,分别就固定式七氟丙烷泡沫灭火系统、固定式压缩空气泡沫灭火系统、半固定式压缩空气泡沫灭火系统、移动式空气泡沫灭火系统和干粉灭火系统相结合等灭火方式进行了探讨,并根据储存方式提供了相应的灭火系统解决方案。针对新型灭火系统应用中存在的问题和创新点提出思考,以期为今后的消防设计及有关标准的制定提供一定思路,提高石化企业油品储存的安全性。

关键词：石油化工低沸点可燃液体灭火系统七氟丙烷泡沫压缩气体泡沫

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国家高新区与高新技术产业耦合协调发展研究

科学学研究 2024年第6期42卷 1165-1178页

作者：孙琴刘戒骄浙江财经大学经济学院浙江杭州310018 中国社会科学院工业经济研究所北京100006

高新技术产业与国家高新区之间存在紧密的联系。本文以国家高新区和高新技术产业的耦合协调为出发点,借助耦合协调度模型构建国家高新区与高新技术产业的耦合协调发展指标体系,测算2009-2020年我国28个省份国家高新区与高新技术产业的... 详细信息

高新技术产业与国家高新区之间存在紧密的联系。本文以国家高新区和高新技术产业的耦合协调为出发点,借助耦合协调度模型构建国家高新区与高新技术产业的耦合协调发展指标体系,测算2009-2020年我国28个省份国家高新区与高新技术产业的耦合协调度,分析耦合协调度的变化状况,并构建面板Tobit模型分析其关键影响因素。研究结果表明,2009-2020年我国28个省份国家高新区与高新技术产业耦合协调度整体是上升的,样本区间内耦合协调度等级经历勉强耦合协调阶段—初级耦合协调阶段—中高级耦合协调阶段。Tobit面板模型结果表明,国家高新区数量、高新区年均从业人员数、有R&D活动企业数对耦合协调度具有显著的正向影响,高新技术产业新产品销售收入对耦合协调度具有显著的负向影响。

关键词：国家高新区高新技术产业耦合协调度影响因素

Research Progress on Career Development of Nursing Staff

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Journal of Clinical and Nursing Research 2024年第5期8卷 180-187页

作者： jie liu Yuying Hao Rui Song Li Cao Can Deng School of Nursing Shaanxi University of Traditional Chinese MedicineXianyang 712046Shaanxi ProvinceChina Department of Nursing Affiliated Hospital of Shaanxi University of Traditional Chinese MedicineXianyang 712000Shaanxi ProvinceChina

There are few studies on career development as an exclusive concept in the field of nursing in China.Currently,research related to the career development of nursing staff primarily relies on inductive evaluation tools,and there is less systematic summarization of this research.This paper reviews the concept,evaluation tools,and influencing factors of nursing career development,aiming to provide a reference for future research in this area.

关键词： Career development Nursing staff Summary

传感器安装位置对负载敏感液压系统动态响应的影响

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机床与液压 2024年第4期52卷 71-74页

作者：刘杰中国煤炭科工集团太原研究院有限公司山西太原030006 山西天地煤机装备有限公司山西太原030006 煤矿采掘机械装备国家工程实验室山西太原030006

针对工程实践中出现的负载敏感系统响应迟滞故障,基于负载敏感系统的工作原理,提出传感器对系统响应的影响可能性。经过实验与分析,得到传感器在不同安装位置时的动态响应曲线,同时分析其影响机制和改进措施。最后,根据不同使用工况得... 详细信息

针对工程实践中出现的负载敏感系统响应迟滞故障,基于负载敏感系统的工作原理,提出传感器对系统响应的影响可能性。经过实验与分析,得到传感器在不同安装位置时的动态响应曲线,同时分析其影响机制和改进措施。最后,根据不同使用工况得到传感器的安装最优位置。

关键词：液压传动负载敏感系统传感器动态响应

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往复式液压增压装置动态响应特性分析

机床与液压 2024年第9期52卷 123-127页

通过对往复式液压增压装置液压控制原理的分析,构建增压装置数学模型,根据数学模型对增压装置的工作特性进行初步判断。同时,通过实验监测不同压力等级下增压器的动态响应,对比得出响应特性结论。发现往复式增压器工作中存在“锯齿状”... 详细信息

通过对往复式液压增压装置液压控制原理的分析,构建增压装置数学模型,根据数学模型对增压装置的工作特性进行初步判断。同时,通过实验监测不同压力等级下增压器的动态响应,对比得出响应特性结论。发现往复式增压器工作中存在“锯齿状”压力波动,其输出压力略大于理想值,输出误差在10%以内,最大换向时间随压力等级增加呈现先增加后减小趋势,换向次数随压力等级增加而增加。对于低于30 MPa的工况和控制精度比较高的工况,往复式增压器效率较低,并不适用,需引入闭环控制并考虑其波动特性。

关键词：增压器液压系统响应特性实验分析

Effect and Safety of Herbal Medicine Foot Baths in Patients with Diabetic Peripheral Neuropathy:A Multicenter Double-Blind Randomized Controlled Trial

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Chinese Journal of Integrative Medicine 2024年第3期30卷 195-202页

作者： HUANG Hao-yue LIN Yu-ping WEI Hua FU Yu ZHOU Yue-hong FANG Zhao-hui QIU Xiao-tang WANG Mei LI Qing-bo LI Shan-shan WANG Shi-dong DAI Fang liu Zhen-jie ZHAO Ling WEN Jian-xuan WU Li-yan ZENG Hui-yan ZHANG Jin-ming LU Qi-yun HE liu SONG Wei SUN Lu LUO Lu-lu HE Jia-li XIE Wen-wen LIANG Qing-shun HUANG Yuan ZHU Sheng-ling LONG jie-er GAO Zhi-juan WEN Ze-huai LI Chun-ji OUYANG Wen-wei LI Geng WU Ming-hui LI An-xiang HUANG Jin-zhu Sanjoy K Paul TANG Xian-yu FAN Guan-jie Department of Endocrinology Guangdong Provincial Hospital of Chinese MedicineGuangzhou510120China The Second Clinical College of Guangzhou University of Chinese Medicine Guangzhou510120China Department of Endocrinology The Second Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhou510120China Guangdong Provincial Academy of Chinese Medical Sciences Guangzhou510120China Department of Endocrinology The First Affiliated Hospital of Henan University of Chinese MedicineZhengzhou450000China Department of Endocrinology Liuyang Hospital of Chinese MedicineChangsha410000China Department of Endocrinology The First Affiliated Hospital of Anhui University of Chinese MedicineHefei230000China Department of Endocrinology Hainan Provincial Hospital of Traditional Chinese MedicineHaikou570100China Department of Endocrinology The Affiliated Hospital of Liaoning University of Traditional Chinese MedicineShenyang110000China Department of Geriatric Luoyang No.1 Hospital of Traditional Chinese MedicineLuoyangHenan Province471000China Department of Endocrinology The Second Affiliated Hospital of Guizhou University of Traditional Chinese MedicineGuiyang550000China Department of Endocrinology Beijing University of Chinese Medicine Affiliated Dongzhimen HospitalBeijing100000China Department of Endocrinology The First Affiliated Hospital of Guizhou University of Traditional Chinese MedicineGuiyang550000China Melbourne EpiCentre The University of Melbourne and Melbourne HealthMelbourne3013Australia

Objective:To evaluate the effect and safety of foot baths with Tangbi Waixi Decoction(TW)in treating patients with diabetic peripheral neuropathy(DPN).Methods:It is a multicenter double-blinded randomized controlled trial.Participants with DPN were recruited between November 18,2016 and May 30,2018 from 8 hospitals in China.All patients received basic treatments for glycemic management.Patients received foot baths with TW herbal granules either 66.9 g(intervention group)or 6.69 g(control group)for 30 min once a day for 2 weeks and followed by a 2-week rest,as a therapeutic course.If the Toronto Clinical Scoring System total score(TCSS-TS)6 points,the patients received a total of 3 therapeutic courses(for 12 weeks)and were followed up for 12 weeks.The primary outcome was change in TCSS-TS score at 12 and 24 weeks.Secondary outcomes included changes in bilateral motor nerve conduction velocity(MNCV)and sensory nerve conduction velocity(SNCV)of the median and common peroneal nerve.Safety was also assessed.Results:Totally 632 patients were enrolled,and 317 and 315 were randomized to the intervention and control groups,respectively.After the 12-week intervention,patients in both groups showed significant declines in TCSSTS scores,and significant increases in MNCV and SNCV of the median and common peroneal nerves compared with pre-treatment(P0.05),and no serious adverse event was related with treatment.Conclusion:Treatment of TW foot baths was safe and significantly benefitted patients with DPN.A low dose of TW appeared to be more effective than a high dose.(Registry No.Chi CTR-IOR-16009331)

关键词： diabetic peripheral neuropathy herbal medicine foot baths Chinese medicine randomized controlled trial Tangbi Waixi Decoction