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规范肺功能测定技术提高肺功能测定水平

中华结核和呼吸杂志 2006年第12期29卷 793-795页

作者：何权瀛北京大学人民医院呼吸科 100044

国外最早开始测量肺功能是在17世纪80年代.1979年美国胸科学会制定了肺功能测定操作规范[1],8年后,即1987年又对该操作规范进行了修订和补充[2].

关键词：肺功能测定美国胸科学会水操作

High quality repair of osteochondral defects in rats using the extracellular matrix of antler stem cells

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World Journal of Stem Cells 2024年第2期16卷 176-190页

作者： Yu-Su Wang Wen-Hui Chu Jing-Jie Zhai Wen-ying Wang Zhong-Mei he quan-Min Zhao Chun-Yi Li Institute of Antler Science and Product Technology Changchun Sci-Tech UniversityChangchun 130000Jilin ProvinceChina College of Chinese Medicinal Materials Jilin Agricultural UniversityChangchun 130118Jilin ProvinceChina School of Life Science Taizhou UniversityTaizhou 318000Zhejiang ProvinceChina Department of Oral Implantology Hospital of StomatologyJilin UniversityChangchun 130000Jilin ProvinceChina

BACKGROUND Cartilage defects are some of the most common causes of *** lesions caused by inflammation,trauma or degenerative disease normally result in osteochondral *** studies have shown that decellularized extracellular matrix(ECM)derived from autologous,allogenic,or xenogeneic mesenchymal stromal cells(MSCs)can effectively restore osteochondral *** To determine whether the decellularized ECM of antler reserve mesenchymal cells(RMCs),a xenogeneic material from antler stem cells,is superior to the currently available treatments for osteochondral *** We isolated the RMCs from a 60-d-old sika deer antler and cultured them in vitro to 70%confluence;50 mg/mL L-ascorbic acid was then added to the medium to stimulate ECM *** sheets of adipocyte-derived MSCs(aMSCs)and antlerogenic periosteal cells(another type of antler stem cells)were used as the *** weeks after ascorbic acid stimulation,the ECM sheets were harvested and applied to the osteochondral defects in rat knee *** The defects were successfully repaired by applying the *** highest quality of repair was achieved in the RMC-ECM group both in vitro(including cell attachment and proliferation),and in vivo(including the simultaneous regeneration of well-vascularized subchondral bone and avascular articular hyaline cartilage integrated with surrounding native tissues).Notably,the antler-stem-cell-derived ECM(xenogeneic)performed better than the aMSC-ECM(allogenic),while the ECM of the active antler stem cells was superior to that of the quiescent antler stem *** Decellularized xenogeneic ECM derived from the antler stem cell,particularly the active form(RMC-ECM),can achieve high quality repair/reconstruction of osteochondral defects,suggesting that selection of decellularized ECM for such repair should be focused more on bioactivity rather than kinship.

关键词： Osteochondral defect repair Mesenchymal stem cells Extracellular matrix Decellularization Antler stem cells Reserve mesenchymal cells Xenogeneic

长期持续气道正压通气对阻塞性睡眠呼吸暂停低通气综合征患者血压影响的荟萃分析

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中华医学杂志 2007年第17期87卷 1177-1180页

作者：莫莉何权瀛北京大学人民医院呼吸内科 100044

目的探讨长期持续气道正压(CPAP)通气能否降低阻塞性睡眠呼吸暂停低通气综合征(OSAHS)患者血压水平。方法用关键词途径从 MEDHNE、中国期刊全文专题数据库计算机检索系统检索2000至2006年的相关文献,将观察对象限制为 OSAHS 患者,CPAP ... 详细信息

目的探讨长期持续气道正压(CPAP)通气能否降低阻塞性睡眠呼吸暂停低通气综合征(OSAHS)患者血压水平。方法用关键词途径从 MEDHNE、中国期刊全文专题数据库计算机检索系统检索2000至2006年的相关文献,将观察对象限制为 OSAHS 患者,CPAP 治疗≥4周,比较CPAP 和非 CPAP 治疗对24 h 血压影响的所有临床随机对照研究数据进行荟萃分析。结果 7项研究共471例患者被纳入荟萃分析,其中3项研究支持 CPAP 可以降低 OSAHS 患者24 h 平均舒张压;而另4项研究不支持。荟萃分析结果表明长期 CPAP 治疗可以降低 OSAHS 患者24 h 平均舒张压加权均数差:-1.78(95%CI:-3.34,-0.22)]。结论长期 CPAP 治疗可以降低 OSAHS 患者24 h 平均舒张压。

关键词：睡眠呼吸暂停,阻塞性持续气道正压动态血压监测荟萃分析

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对AECC制定的ARDS诊断标准的再讨论

中国危重病急救医学 2009年第4期21卷 196-198页

作者：黎檀实何权瀛解放军总医院急诊科北京100853 北京大学人民医院

1994年北美呼吸病一欧洲危重病学会专家联席评审会议（AECC）发表了急性肺损伤／急性呼吸窘迫综合征（ALI／ARDS）诊断共识，该诊断标准将临床上具有呼吸窘迫、顽固性低氧血症和非心源性肺水肿为特征的一类综合征进行了诊断上的规范，... 详细信息

1994年北美呼吸病一欧洲危重病学会专家联席评审会议（AECC）发表了急性肺损伤／急性呼吸窘迫综合征（ALI／ARDS）诊断共识，该诊断标准将临床上具有呼吸窘迫、顽固性低氧血症和非心源性肺水肿为特征的一类综合征进行了诊断上的规范，为临床诊治工作提供了很大的帮助，有助于鉴别有共同临床表现的患者群，

关键词：急性呼吸窘迫综合征诊断 ARDS 标准非心源性肺水肿临床表现急性肺损伤低氧血症

Harmonic State Space Based Impedance Modeling and Virtual Impedance Based Stability Enhancement Control for LCC-HVDC Systems

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Journal of Modern Power Systems and Clean Energy 2024年第1期12卷 287-298页

作者： Yifeng Liu Xiaoping Zhou quan Chen Hanhang Yin Lerong Hong Hao Tian ying Chen Siyuan Li the College of Electrical and Information Engineering Hunan UniversityChangsha 410082China the Zhejiang Magtron Intelligent Technology Limited Cooperation Jiaxing 314000China the State Grid Qianjiang Electric Power Company Qianjiang 433100China

Line commutated converter based high-voltage direct-current(LCC-HVDC)transmissions are prone to harmonic oscillation under weak *** modeling is an effective method for assessing interaction ***,this paper proposes an improved calculation method for the DC voltage and AC currents of commutation stations to address the complex linearization of the commutation process and constructs an overall harmonic state-space(HSS)model of an *** on the HSS model,the closed-loop AC impedances on the LCC-HVDC sending and receiving ends are then derived and *** impedance characteristics of the LCC-HVDC are then analyzed to provide a physical explanation for the harmonic oscillation of the *** effects of the grid strength and control parameters on system stability are also *** improve the impedance characteristics and operating stability of the LCC-HVDC system,a virtual impedance based stability enhancement control is proposed,and a parameter design method is considered to ensure satisfactory phase margins at both the sending and receiving ***,simulation results are presented to verify the validity of the impedance model and virtual impedance based stability enhancement control.

关键词： Line commutated converter based high-voltage direct-current(LCC-HVDC)transmission harmonic state space stability analysis harmonic oscillation virtual impedance

Intestinal Behçet's disease: A review of clinical diagnosis and treatment

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World Journal of Gastrointestinal Surgery 2024年第6期16卷 1493-1500页

作者： ying Liu Feng Gao Ding-quan Yang Yan Jiao Department of General Surgery The Affiliated Hospital to Changchun University of Chinese MedicineChangchun 130021Jilin ProvinceChina Department of Gastrointestinal and Colorectal Surgery China-Japan Union Hospital of Jilin UniversityChangchun 130033Jilin ProvinceChina Department of hepatobiliary and Pancreatic Surgery General Surgery CenterThe First Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina

Behçet's disease(BD)is a chronic inflammatory disorder prone to frequent re-currences,with a high predilection for intestinal ***,the ef-ficacy and long-term effects of surgical treatment for intestinal BD are *** the current issue of World J Gastrointest Surg,Park et al conducted a retrospec-tive analysis of 31 patients with intestinal BD who received surgical *** found that elevated C-reactive protein levels and emergency surgery were poor prognostic factors for postoperative recurrence,emphasizing the adverse impact of severe inflammation on the prognosis of patients with intestinal *** work has clinical significance for evaluating the postoperative condition of intestinal *** editorial attempts to summarize the clinical diagnosis and treatment of intestinal BD,focusing on the impact of adverse factors on surgical *** hope this review will facilitate more precise postoperative management of patients with intestinal BD by clinicians.

关键词： Intestinal Behçet's disease Diagnosis Treatment Surgery Recurrence

Engineering hydrophobic protective layers on zinc anodes for enhanced performance in aqueous zinc-ion batteries

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Journal of Energy Chemistry 2024年第10期97卷 1-11,I0001页

作者： Taofeng Li Suxia Yan Hongyu Dong Yang Zheng Kun Ming ying Chen Haitao Li Guochun Li Zhixia he Weimin Li quan Wang Xiaohui Song Junfeng Liu Edison Huixiang Ang Yong Wang Institute for Energy Research Jiangsu UniversityZhenjiang 212013jiangsuChina Natural Sciences and Science Education National Institute of EducationNanyang Technological UniversitySingapore 63766Singapore School of Mechanical Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina Shenzhen Cllege of Advanced Technology University of Chinese Academy of SciencesShenzhen 518055GuangdongChina Shandong Zhongke Advanced Technology Co. LtdJinan 250101ShandongChina School of Materials Science and Engineering HefeiUniversity of TechnolgyHefei230009AnhuiChi

Aqueous zinc-ion batteries possess substantial potential for energy storage applications;however,they are hampered by challenges such as dendrite formation and uncontrolled side reactions occurring at the zinc *** our investigation,we sought to mitigate these issues through the utilization of in situ zinc complex formation reactions to engineer hydrophobic protective layers on the zinc anode *** robust interfacial layers serve as effective barriers,isolating the zinc anode from the electrolyte and active water molecules and thereby preventing hydrogen evolution and the generation of undesirable ***,the presence of numerous zincophilic sites within these protective layers facilitates uniform zinc deposition while concurrently inhibiting dendrite *** comprehensive evaluation of functional anodes featuring diverse functional groups and alkyl chain lengths,we meticulously scrutinized the underlying mechanisms influencing performance *** analysis involved precise modulation of interfacial hydrophobicity,rapid Zn^(2+)ion transport,and ordered deposition of Zn^(2+)***,the optimized anode,fabricated with octadecylphosphate(OPA),demonstrated exceptional performance *** Zn//Zn symmetric cell exhibited remarkable longevity,exceeding 4000 h under a current density of 2 mA cm^(-2)and a capacity density of 2 mA h cm^(-2),Furthermore,when integrated with a VOH cathode,the complete cell exhibited superior capacity retention compared to anodes modified with alternative organic molecules.

关键词： Aqueous zinc-ion batteries Hydrophobic protective layers Zinc anode stability Dendrite growth inhibition Energy storage

Degree of shade tolerance shapes seasonality of chlorophyll, nitrogen and phosphorus levels of trees and herbs in a temperate deciduous forest

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Journal of Forestry Research 2024年第4期35卷 60-72页

作者： Jiajia Zeng Fan Liu Yuan Zhu Jiayi Li ying Ruan Xiankui quan Chuankuan Wang Xingchang Wang Aulin College Northeast Forestry UniversityHarbin 150040People’s Republic of China Center for Ecological Research Northeast Forestry UniversityHarbin 150040People’s Republic of China Key Laboratory of Agricultural Water Resources Center for Agricultural Resources ResearchInstitute of Genetics and Developmental BiologyChinese Academy of SciencesShijiazhuang 050021People’s Republic of China Institute of Applied Ecology Chinese Academy of SciencesShenyang 110016People’s Republic of China Key Laboratory of Sustainable Forest Ecosystem Management Ministry of EducationNortheast Forestry UniversityHarbin 150040People’s Republic of China

Forest productivity is closely linked to seasonal variations and vertical differentiation in leaf ***,leaf structural and chemical traits variation among co-existing species,and plant functional types within the canopy are poorly *** this study,the seasonality of leaf chlorophyll,nitrogen(N),and phosphorus(P)were quantified vertically along the canopy of four major tree species and two types of herbs in a temperate deciduous *** role of shade tolerance in shaping the seasonal variation and vertical differentiation was *** the entire season,chlorophyll content showed a distinct asymmetric unimodal pattern for all species,with greater chlorophyll levels in autumn than in spring,and the timing of peak chlorophyll per leaf area gradually decreased as shade tolerance *** a:b ratios gradually decreased with increasing shade *** N and P contents sharply declined during leaf expansion,remained steady in the mature stage and decreased again during leaf *** the seasons,the lower canopy layer had significantly higher chlorophyll per leaf mass but not chlorophyll per leaf area than the upper canopy layer regardless of degree of shade ***,N and P per leaf area of intermediate shade-tolerant and fully shade-tolerant tree species were significantly higher in the upper canopy than in the *** variations in N:P ratios suggest changes in N or P *** findings indicate that shade tolerance is a key feature shaping inter-specific differences in leaf chlorophyll,N,and P contents as well as their seasonality in temperate deciduous forests,which have significant implications for modeling leaf photosynthesis and ecosystem production.

关键词： Leaf traits Leaf nutrients Seasonal variations Chlorophyll Nitrogen Phosphorus Shade tolerance Canopy layers

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哮喘防控模式的几点思考

医学与哲学 2005年第11X期26卷 45-47页

作者：何权瀛北京大学人民医院呼吸科北京100044

简单介绍了在支气管哮喘患者教育和管理工作中的若干体会。结果表明,我们所采取的哮喘教育管理体系(包括哮喘患者门诊、哮喘患者协会和哮喘宣教中心)是一种先进的医疗服务模式,不仅可以有效地改善医患关系,还可以显著提高哮喘患者对哮... 详细信息

简单介绍了在支气管哮喘患者教育和管理工作中的若干体会。结果表明,我们所采取的哮喘教育管理体系(包括哮喘患者门诊、哮喘患者协会和哮喘宣教中心)是一种先进的医疗服务模式,不仅可以有效地改善医患关系,还可以显著提高哮喘患者对哮喘认知水平和防治疾病的依从性,提高哮喘控制水平、生命质量,减少非预约门诊、急诊、住院次数,降低医疗费用。

关键词：支气管哮喘教育管理