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Divergent shift of normal alpine meadow exacerbated soil loss of hillslope alpine meadows based on field experiments

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International Soil and Water Conservation Research 2024年第3期12卷 565-577页

作者： yulei Ma Yifan Liu Yunyun Ban Jingxue zhao Zhihua Shi Gaolin Wu State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau College of Soil and Water Conservation Science and Engineering(Institute of Soil and Water Conservation)Northwest A&F UniversityYanglingShaanxi712100China Institute of Soil and Water Conservation Chinese Academy of Sciences and Ministry of Water ResourceYanglingShanxi712100China Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing100101China State Key Laboratory of Herbage Imrovement and Grassland AgroEosystem and Colegeof EoogyLanzhou UniversyLanzhou730000Chin College of Resources and Environment Huazhong Agricultural UniversityWuhan430070China CAs Center for Excellence in Quaternary Science and Global Change Xi'an710061China

Global climate change and overgrazing are driving shifts in the plant composition of grassland com-munities,which may profoundly affect the function of grassland ecosystems in regulating runoff and soil ***,we examined the shift effects of normal hillslope alpine meadow to shrub and severely degraded meadow states on runoff and sediment generation under natural rainfall conditions,and determined the contributions of plant and soil properties changes to soil erodibility,runoff and sediment generation by in situ rainfall experiment and monitoring on the hillslope of Qinghai-Tibetan *** results showed that normal meadow shift into severely degraded meadow state,mean weight diameter,soil saturated hydraulic conductivity,soil cohesion and soil erodibility K-factor at the topsoil decreased by 70.3%,73.1%,80.3%and-13.1%,respectively,and when normal meadows shift into shrub meadow state,they reduced by 49.1%,-1.3%,49.4%,and-8.3%,*** and soil loss significantly changed by-40.0%and 177.8%when normal meadow shifted into a severely degraded meadow state,while runoff and soil loss significantly changed by+65.0%and+77.8%when normal meadow shifted into a shrub meadow *** findings highlight that the two divergent shifts both increased soil loss compared to the normal hillslope alpine ***,our results indicate that the divergent shifts of normal alpine meadows exacerbated soil erodibility and soil loss of hillslope alpine *** results obtained here offer a novel perspective on the regulation of runoff and soil erosion in the alpine meadow ecosystem.

关键词： Alpine meadow Divergent shifts RunoffSoil erodibility Soil loss

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Single-source precursor derived high-entropy metal–carbide nanowires:Microstructure and growth evolution

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Journal of Advanced Ceramics 2023年第11期12卷 2041-2052页

作者： Junhao zhao yulei Zhang Hui Chen Yanqin Fu Qing Miao Jiachen Meng Jiachen Li Shaanxi Key Laboratory of Fiber Reinforced Light Composite Materials Northwestern Polytechnical UniversityXi’an 710072China Henan Key Laboratory of High Performance Carbon Fiber Reinforced Composites Institute of Carbon Matrix CompositesHenan Academy of SciencesZhengzhou 450046China

In recent years,high-entropy metal carbides(HECs)have attracted significant attention due to their exceptional physical and chemical *** combination of excellent performance exhibited by bulk HEC ceramics and distinctive geometric characteristics has paved the way for the emergence of one-dimensional(1D)HECs as novel materials with unique development ***,we successfully fabricated novel(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))C nanowires derived via Fe-assisted single-sourced precursor *** to the synthesis of the nanowires,the composition and microstructure of(Ti,Zr,Hf,Nb,Ta)-containing precursor(PHECs)were analyzed,and divinylbenzene(DVB)was used to accelerate the conversion process of the precursor and contribute to the formation of HECs,which also provided a partial carbon source for the nanowire ***,multi-branched,single-branched,and single-branched bending nanowires were synthesized by adjusting the ratio of PHECs to *** obtained single-branched(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))C nanowires possessed smooth surfaces with an average diameter of 130–150 nm and a length of several tens of micrometers,which were a single-crystal structure and typically grew along the[11¯1]***,the growth of the(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))C nanowires was in agreement with top-type vapor–liquid–solid *** work not only successfully achieved the fabrication of HEC nanowires by a catalyst-assisted polymer pyrolysis,but also provided a comprehensive analysis of the factors affecting their yield and morphology,highlighting the potential application of these attractive nano-materials.

关键词： (Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))C nanowires high-entropy metal carbides(HECs) (Ti,Zr,Hf,Nb,Ta)-containing precursors vapor–liquid–solid(VLS)mechanism

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Guest editorial:Blockchain-enabled technologies for cyber-physical systems and big data applications

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Digital Communications and Networks 2022年第5期8卷 589-590页

作者： Zheng Yan Qinghua Zheng yulei Wu Yaliang zhao Mohammed Atiquzzaman Xidian University China Xi'an Jiaotong University China University of Exeter UK Henan University China&St.Francis Xavier UniversityCanada University of Oklahoma USA

*** and motivation Cyber-Physical System(CPS)refers to the seamless integration of the physical processes,computational components,and Internet-of-Things(IoT)devices such as sensors,actuators,and so *** of CPS include smart grids,autonomous transportation systems,medical monitoring,process control systems,robotic systems,and automatic pilot avionics.

关键词： autonomous smart IoT

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Femtosecond laser-induced periodic surface structures on hard and brittle materials

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Science China(Technological Sciences) 2024年第1期67卷 19-36页

作者： zhao GuoXu WANG Gong LI YunFei WANG Lei LIAN YuDong YU Yu zhao Hui WANG yulei LU ZhiWei Center for Advanced Laser Technology Hebei University of TechnologyTianjin 300401China Hebei Key Laboratory of Advanced Laser Technology and Equipment Tianjin 300401China State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China School of Information and Electrical Engineering Hebei University of EngineeringHandan 056038China

Hard and brittle materials have high hardness,excellent optical stability,chemical stability,and high thermal ***,they have huge application potential in various fields,such as optical components,substrate materials,and quantum information,especially under harsh conditions,such as high temperatures and high *** laser direct writing technology has greatly promoted the development of femtosecond laser-induced periodic surface structure(Fs-LIPSS or LIPSS by a femtosecond laser)applications of hard and brittle materials due to its high precision,controllability,and three-dimensional processing *** far,LIPSSs have been widely used in material surface treatment,optoelectronic devices,and ***,a consensus has not been reached regarding the formation mechanism of LIPSSs on hard and brittle *** this paper,three widely accepted LIPSS formation mechanisms are introduced,and the characteristics and applications of LIPSSs on diamonds,silicon,silicon carbide,and fused silica surfaces in recent years are *** addition,the application prospects and challenges of LIPSSs on hard and brittle materials by a femtosecond laser are discussed.

关键词： laser-induced periodic surface structures hard and brittle materials femtosecond laser

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恙虫病45例临床特征分析

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中国麻风皮肤病杂志 2016年第11期32卷 669-671页

作者：赵玉磊张晓荣杨玉花田婷张汝芝苏州大学附属第三医院皮肤科江苏常州213003 南京医科大学附属南京医院皮肤科江苏南京210006

目的：分析恙虫病患者的临床特征。方法：回顾性分析2012年8月至2016年3月在我科就诊的45例恙虫病患者的临床资料。结果：潜伏期1-3周。主要表现发热（100.00％,45/45）、头痛（28.89％,13/45）、肌痛（55.56％,25/45）、皮损（100.00％... 详细信息

目的：分析恙虫病患者的临床特征。方法：回顾性分析2012年8月至2016年3月在我科就诊的45例恙虫病患者的临床资料。结果：潜伏期1-3周。主要表现发热（100.00％,45/45）、头痛（28.89％,13/45）、肌痛（55.56％,25/45）、皮损（100.00％,45/45）、疲倦（71.11％,32/45）、胃肠道症状（35.55％,16/45）。37例（82.22％）患者躯干四肢出现红斑和斑丘疹。特征性皮损是所有患者出现焦痂,好发于胸部（28.89％,13/45）、腹部（24.44％,11/45）、腋下（11.11％,5/45）和外阴（8.89％,4/45）。结论：恙虫病临床表现多样,皮肤焦痂溃疡性损害是本病的特征性皮肤表现。

关键词：丛林斑疹伤寒临床特征回顾性分析

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高师有机化学实验开展课程思政的探索与实践

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广东化工 2024年第7期51卷 199-200页

作者：颜世娜杨加芹许丽荣曹子平赵育磊山东省曲阜师范大学化学与化工学院山东曲阜273165

为落实高校教书育人的根本任务,针对高校化学学科的特点,分析了有机实验的现状,介绍了安全管理普遍存在的问题,提出了有机化学实验开展课程思政的必要性和路径。结合课程思政教育的特点,优化重组教学内容,强化学习过程管理,加强安全教... 详细信息

为落实高校教书育人的根本任务,针对高校化学学科的特点,分析了有机实验的现状,介绍了安全管理普遍存在的问题,提出了有机化学实验开展课程思政的必要性和路径。结合课程思政教育的特点,优化重组教学内容,强化学习过程管理,加强安全教育培训,从教学方法、实验教学等方面去提高学生的实验能力和科研素质。通过改革,降低了环境污染,创造了安全和谐的实验环境。

关键词：课程思政有机化学实验教学改革课程建设安全

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Structural modification and antitumor activity of antimicrobial peptide HYL

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Chinese Chemical Letters 2020年第5期31卷 1288-1292页

作者： Minghao Wu Qing Chen Yingdi Wang yulei Li Xia zhao Qi Chang Key Laboratory of Marine Drugs Ministry of EducationSchool of Medicine and PharmacyOcean University of ChinaQingdao 266003China Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology Qingdao 266237China

HYL derived from the venom of the solitary bee Hylaeus signatus(Hymenoptera:Colletidae)is anα-helical antimicrobial peptide with 16 *** explore whether HYL can be applied in anti-tumor therapy,we synthesized HYL and further modified its structure by using a solid-phase synthesis method,and then evaluated their antitumor ***,we identified the key residues of HYL by alanine scanning strategy,and then a series of stapled peptides were synthesized by hydrocarbon stapling strategy without destroying the key *** the stapled peptides of HYL showed significant improvement not only inα-helicity,but also in antitumor activity and protease resistance when compared to the parent peptide *** results showed that hydrophobicity and amphiphilicity are important factors affecting the antitumor activity of HYL,and the stapling strategy can significantly affect the proteolytic stability and helicity of ***’s more,we find that the stapled peptides HYL-14,HYL-16 and HYL-18 show a promising prospect for novel anti-tumor drug development.

关键词： HYL α-Helical peptide Stapled peptide Hydrocarbon stapling strategy Antitumor activity Solid-phase synthesis

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侵袭性真菌感染患者采用伏立康唑静脉和口服给药对血药浓度和临床疗效影响的对比分析

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药学与临床研究 2023年第6期31卷 539-542页

作者：刘亭亭赵宇蕾陈晓燚岳慧杰黄晓晖东部战区总医院临床药学科南京210002

目的:比较侵袭性真菌感染患者采用伏立康唑静脉和口服两种给药途径对血药浓度、临床疗效以及安全性的影响。方法:选取2021年9月~2023年3月就诊于东部战区总医院并接受伏立康唑治疗的侵袭性真菌感染患者,按给药途径分为静脉组和口服组,... 详细信息

目的:比较侵袭性真菌感染患者采用伏立康唑静脉和口服两种给药途径对血药浓度、临床疗效以及安全性的影响。方法:选取2021年9月~2023年3月就诊于东部战区总医院并接受伏立康唑治疗的侵袭性真菌感染患者,按给药途径分为静脉组和口服组,比较两组的血药浓度、临床疗效和安全性。结果:研究纳入104例患者进行分析,共收集231例伏立康唑血药浓度。静脉组的稳态谷浓度平均值略高于口服组,差异无统计学意义[(3.44±2.45)mg·L^(-1)vs (2.90±2.55)mg·L^(-1),P>0.05],两组间的目标浓度达标率相近(71.70%vs 76.80%),但静脉组高于目标范围上限的比例大于口服组(22.64%vs 12.80%)。两组之间的临床有效率和总体药物不良反应发生率相近,差异无统计学意义(68.75%vs 77.78%,P>0.05;40.62%vs 52.38%,P>0.05)。结论:侵袭性真菌感染患者使用伏立康唑静脉给药的血药浓度有大于口服给药的趋势,但两组间的目标浓度达标率,以及临床疗效和安全性均无统计学意义上的差异。

关键词：伏立康唑血药浓度监测临床疗效不良反应

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米诺环素口服治疗碳青霉烯类耐药鲍曼不动杆菌感染的临床疗效及影响因素分析

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药学与临床研究 2024年第3期32卷 262-266,273页

作者：刘亭亭张敬柱马雪萍初亚男赵宇蕾东部战区总医院临床药学科南京210002 东部战区总医院重症医学科南京210002

目的:评估米诺环素口服治疗碳青霉烯类耐药鲍曼不动杆菌(CRAB)感染的临床疗效,并对相关的影响因素进行分析。方法:回顾性收集2021年6月~2023年10月就诊于东部战区总医院并接受米诺环素口服治疗CRAB感染患者的临床资料,采用Logistic回归... 详细信息

目的:评估米诺环素口服治疗碳青霉烯类耐药鲍曼不动杆菌(CRAB)感染的临床疗效,并对相关的影响因素进行分析。方法:回顾性收集2021年6月~2023年10月就诊于东部战区总医院并接受米诺环素口服治疗CRAB感染患者的临床资料,采用Logistic回归分析临床疗效的影响因素。结果:最终纳入83例确诊或疑似CRAB感染并采用米诺环素口服治疗的患者,临床有效率为54.22%,微生物学清除率为49.40%。Logistic回归分析结果显示,米诺环素对CRAB的最低抑菌浓度(MIC)≥16 mg·L^(-1)是影响患者临床疗效和微生物学清除率的独立危险因素(OR 0.08,95%CI 0.01~0.44,P=0.004;OR 0.10,95%CI 0.02~0.51,P=0.006)。此外,住院时长>30 d是影响微生物学清除率的独立危险因素(OR 0.34,95%CI 0.12~0.97,P=0.043;OR 0.08,95%CI 0.01~0.42,P=0.003)。结论:基于单中心小样本量的研究结果显示,米诺环素口服治疗CRAB感染患者的临床疗效有限。米诺环素对CRAB的MIC≥16 mg·L^(-1)时,抗感染临床疗效和微生物学清除率均显著降低。

关键词：米诺环素碳青霉烯类耐药鲍曼不动杆菌临床疗效微生物学清除率影响因素

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Carrier dynamics and terahertz photoconductivity of doped silicon measured by femtosecond pump-terahertz probe spectroscopy

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Science China(Physics,Mechanics & Astronomy) 2009年第12期52卷 1944-1948页

作者： ZHOU QingLi SHI yulei LI Tong JIN Bin zhao DongMei ZHANG CunLin Beijing Key Laboratory for Terahertz Spectroscopy and Imaging Key Laboratory of Terahertz OptoelectronicsMinistry of EducationDepartment of PhysicsCapital Normal UniversityBeijing 100048China Department of Electronics Engineering Tianjin University of Technology and EducationTianjin 300222China

The carrier dynamics and terahertz photoconductivity in the n-type silicon (n-Si) as well as in the p-type Silicon (p-Si) have been investigated by using femtosecond pump-terahertz probe technique. The measurements show that the relative change of terahertz transmission of p-Si at low pump power is slightly smaller than that of n-Si,due to the lower carrier density induced by the recombination of original holes in the p-type material and the photogenerated electrons. At high pump power,the bigger change of terahertz transmission of p-Si originates from the greater mobility of the carriers compared to n-Si. The transient photoconductivities are calculated and fit well with the Drude-Smith model,showing that the mobility of the photogenerated carriers decreases with the increasing pump power. The obtained results indicate that femtosecond pump-terahertz probe technique is a promising method to investigate the carrier dynamics of semiconductors.

关键词： semiconductor terahertz carrier dynamics

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