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Relationships among the Stem,Aboveground and Total Biomass across Chinese Forests

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Journal of Integrative Plant Biology 2007年第11期49卷 1573-1579页

作者： Dong-Liang Cheng Gen-Xuan Wang Tao Li Qing-Long Tang chun-mei gong College of Geographical Science Fujian Normal University Fuzhou 350007 China College of Life Sciences Zhejiang University Hangzhou 310027 China Kay Laboratory of Arid and Grassland Agroecology at Lanzhou University Ministry of Education Lanzhou 730000 China

Forest biomass plays a key role in the global carbon cycle. In the present study, a general allometric model was derived to predict the relationships among the stem biomass Ms, aboveground biomass MA and total biomass MT, based on previously developed scaling relationships for leaf, stem and root standing biomass. The model predicted complex scaling exponents for MT and/or MA with respect to Ms. Because annual biomass accumulation in the stem, root and branch far exceeded the annual increase in standing leaf biomass, we can predict that MT ∝MA ∝ Ms as a simple result of the model. Although slight variations existed in different phyletic affiliations （i.e. conifers versus angiosperms）, empirical results using Model Type Ⅱ （reduced major axis） regression supported the model＇s predictions. The predictive formulas among stem, aboveground and total biomass were obtained using Model Type I （ordinary least squares） regression to estimate forest biomass. Given the low mean percentage prediction errors for aboveground （and total biomass） based on the stem biomass, the results provided a reasonable method to estimate the biomass of forests at the individual level, which was insensitive to the variation in local environmental conditions （e.g. precipitation, temperature, etc.）.

关键词： aboveground biomass allometry forest isometric scaling plant biomass allocation patterns stem biomass total biomass.

2型糖尿病肾病大鼠肾动脉上BMP2/Smad1/Runx2/Osterix信号通路的激活

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中国动脉硬化杂志 2016年第10期24卷 983-988页

作者：覃春美龚财判魏晓吴蔚桦刘建欧三桃西南医科大学附属第一医院肾病内科四川省泸州市646000

目的探讨2型糖尿病肾病(DN)大鼠模型肾动脉钙化及BMP2/Smad1/Runx2/Osterix信号通路的激活情况。方法 40只大鼠随机分为对照组和2型糖尿病肾病组(DN组,STZ加高脂高糖饮食诱导的2型DN大鼠模型),采用钙离子试剂盒检测8、12、16周时肾动脉... 详细信息

目的探讨2型糖尿病肾病(DN)大鼠模型肾动脉钙化及BMP2/Smad1/Runx2/Osterix信号通路的激活情况。方法 40只大鼠随机分为对照组和2型糖尿病肾病组(DN组,STZ加高脂高糖饮食诱导的2型DN大鼠模型),采用钙离子试剂盒检测8、12、16周时肾动脉钙含量,Von Kossa染色观察肾动脉上钙盐沉积。免疫组化检测肾动脉的BMP2、Smad1、Runx2及Osterix蛋白表达,RT-PCR法检测肾动脉BMP2及Runx2 mRNA水平。结果DN组大鼠各时间点血糖、尿素氮、胱抑素C及24 h尿白蛋白水平均较对照组明显增高(P<0.05),自实验12周后,DN组大鼠的血肌酐值较对照组显著增高(P<0.05)。DN组大鼠肾动脉组织钙含量较同时间点对照组明显增加(P<0.05),Von Kossa染色见对照组大鼠各时间点均无明显钙盐沉积,而DN组大鼠肾动脉自第8周时即有黑色颗粒沉积,随着时间的延长沉积的黑色钙盐逐渐增多并聚集成团。与对照组相比,DN组大鼠肾动脉组织中BMP2及其下游因子的表达明显升高,同时BMP2、Runx2 mRNA水平亦增加。相关性分析表明,肾动脉钙含量与BMP2、Runx2 mRNA均呈显著正相关(r=0.641,r=0.683,均P<0.01)。结论 2型糖尿病肾病模型大鼠肾动脉早期即可出现血管钙化,且BMP2/Smad1/Runx2/Osterix信号通路激活在其中起重要调节作用。

关键词：糖尿病肾病肾动脉骨形态蛋白2 信号通路

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东平湖2007年浮游植物调查及分析

山东农业大学学报（自然科学版） 2009年第4期40卷 513-516页

作者：冷春梅巩俊霞王亚楠郭金峰李秀启王钦东山东省淡水水产研究所山东济南250117

采用优势指数、多样性指数等方法,分析了2007年东平湖浮游植物的组成与变动。分析得出:2007年东平湖浮游植物共有8门83种,其中蓝藻门为主,绿藻门和硅藻门的含量次之,优势种以蓝藻门中的色球藻和席藻为主;根据香农多样性指数等综合分析,2... 详细信息

采用优势指数、多样性指数等方法,分析了2007年东平湖浮游植物的组成与变动。分析得出:2007年东平湖浮游植物共有8门83种,其中蓝藻门为主,绿藻门和硅藻门的含量次之,优势种以蓝藻门中的色球藻和席藻为主;根据香农多样性指数等综合分析,2007年东平湖水质以中度污染为主,重污染和轻污染水域面积较少,且有一定的季节性,3月份的水质略好。

关键词：东平湖浮游植物优势指数多样性指数

Two Weighted Estimates for the Commutators of Multilinear Maximal Singular Integral Operators with Dini-type Kernels

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Acta Mathematica Sinica,English Series 2023年第3期39卷 459-480页

作者： chun mei ZHANG School of Mathematical Sciences Beijing Normal UniversityBeijing 100875P.R.China

The main purpose of this paper is to investigate the properties of the higher order commutators of maximal Calderón-Zygmund operators with Dini-type *** weighted estimates have been established for these *** results ... 详细信息

关键词： Commutators sparse domination multlinear maximal singular integral operators Dinitype kenels two weighted boundedness

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Microbial safety control of compost material with cow dung by heat treatment

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Journal of Environmental Sciences 2007年第8期19卷 1014-1019页

作者： gong chun-ming Xiamen Environmental Protection Research Institute Xiamen 361006 China. Laboratory of Soil Microbiology Faculty of Agriculture Saga University Saga840-8502 Japan

Various kinds of pathogenic bacteria derived from the intestinal tract of animals exist in compost material like cow dung. In order to sterilize the pathogenic bacteria completely in compost material, the cow dung was put into a heat treatment machine in pilot plan, and harmless condition in short time was examined. The results indicated, pathogenic indicator bacteria such as coliform bacteria, fecal coliform, Escherichia coli and salmonella were all 106 cfu/g dw at the beginning, died rapidly when cow dung temperature rose to above 50~C, and not detected at 54-68~C for 6-24 h heat treatment. Coliform bacteria and salmonella in heated cow dung were not detected by re-growth culture and enrichment culture examination. Moreover, it was hardly influenced on the fermentation ability of composting microbe, organic decomposition bacteria. During heat treatment, the mesophile decreased rapidly and the thermophile stabilized or increased, and the most of composting microbe were bacillus in cow dung by fluorescence microscope, this indicated that bacillus was dominator and composting microbe in composting process.

关键词： microbial safety control pathogenic bacteria compost cow dung heat treatment

Acute severe hepatitis of unknown origin in children:considerations from the perspective of immunology

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World Journal of Pediatrics 2022年第8期18卷 529-532页

作者： Si‑Hao Gao Meng‑chun gong Hong‑mei Song Department of Pediatrics Peking Union Medical College HospitalChinese Academy of Medical SciencesBeijingChina Institute of Health Management Southern Medical UniversityGuangzhouChina

Acute severe hepatitis of unknown origin in children,since it was frstly reported in Scotland on March 31,2022,has become an international concern with a high risk of acute liver failure requiring liver *** typical causes for hepatitis have been ruled out and investigations revealed possible relationship between the disease and two potential pathogens,a special form of human adenovirus(HAdV)and severe acute respiratory syndrome coronavirus 2(SARSCoV-2).Acute hepatitis has been reported in children with multisystem infammatory syndrome(MIS-C)and incorporating insights from the immunology perspective is necessary to fully understand this disease.

关键词： Acute acute hepatitis

Combination of olfactory ensheathing cells and human umbilical cord mesenchymal stem cell-derived exosomes promotes sciatic nerve regeneration

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Neural Regeneration Research 2020年第10期15卷 1903-1911页

作者： Yang Zhang Wen-Tao Wang chun-Rong gong Chao Li mei Shi Department of Radiation Oncology Xijing HospitalAir Force Medical UniversityXi’anShaanxi ProvinceChina Department of Orthopedics Changhai HospitalNaval Medical UniversityShanghaiChina Rehabilitation Center North District Hospital of the People’s Hospital of Lin Yi CityLinyiShandong ProvinceChina Department of Orthopedics The Eighth Medical Center of Chinese PLA general HospitalBeijingChina

Olfactory ensheathing cells(OECs)are promising seed cells for nerve ***,their application is limited by the hypoxic environment usually present at the site of *** derived from human umbilical cord mesenchymal stem cells have the potential to regulate the pathological processes that occur in response to *** ability of OECs to migrate is unknown,especially in hypoxic conditions,and the effect of OECs combined with exosomes on peripheral nerve repair is not *** understanding of these issues will enable the potential of OECs for the treatment of nerve injury to be *** this study,OECs were acquired from the olfactory bulb of Sprague Dawley *** umbilical cord mesenchymal stem cell-derived exosomes(0–400μg/mL)were cultured with OECs for 12–48 *** culture with 400μg/mL exosomes for 24 hours,the viability and proliferation of OECs were significantly *** observed changes to OECs subjected to hypoxia for 24 hours and treatment with *** significantly promoted the survival and migration of OECs in hypoxic conditions,and effectively increased brain-derived neurotrophic factor gene expression,protein levels and ***,using a 12 mm left sciatic nerve defect rat model,we confirmed that OECs and exosomes can synergistically promote motor and sensory function of the injured sciatic *** findings show that application of OECs and exosomes can promote nerve regeneration and functional *** study was approved by the Institutional Ethical Committee of the Air Force Medical University,China(approval ***-20181004)on October 7,2018;and collection and use of human umbilical cord specimens was approved by the Ethics Committee of the Linyi People’s Hospital,China(approval No.30054)on May 20,2019.

关键词： brain-derived neurotrophic factor cell migration cell viability functional recovery hypoxia nerve regeneration sciatic functional index sciatic nerve injury

解淀粉芽孢杆菌wxy-b3产脂肽类物质对苹果斑点落叶病菌的抑菌活性研究

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陕西科技大学学报 2025年第1期43卷 46-51页

作者：崔皓玥田露胡乐梅龚国利陕西科技大学食品科学与工程学院陕西西安710021

苹果斑点落叶病菌是苹果生产过程中常见的病害,严重危害苹果农作物的产量.脂肽作为一种主要来源于微生物次生代谢产物的抗菌剂,具有广谱抑菌、低耐药性、安全低毒等优势.本研究发现,解淀粉芽孢杆菌wxy-b3产生的脂肽类物质能够抑制苹果... 详细信息

苹果斑点落叶病菌是苹果生产过程中常见的病害,严重危害苹果农作物的产量.脂肽作为一种主要来源于微生物次生代谢产物的抗菌剂,具有广谱抑菌、低耐药性、安全低毒等优势.本研究发现,解淀粉芽孢杆菌wxy-b3产生的脂肽类物质能够抑制苹果斑点落叶病菌的生长,对苹果斑点落叶病菌的最小抑菌浓度为16 mg/mL,此浓度可造成该病原菌细胞膜电位超极化、线粒体膜电位去极化、大分子蛋白质和核酸泄露,以及胞内活性氧和丙二醛含量分别累积增加0.33倍和5.44倍,并通过扫描电镜进一步观察到MIC处理组的细胞形态起皱、细胞膜破损.上述结果表明,脂肽可能通过破坏细胞膜系统,导致细胞形态发生变化,细胞膜破裂,改变细胞膜通透性来达到抑菌效果.该研究将为脂肽作为抑制苹果斑点落叶病菌的抗菌剂奠定理论基础.

关键词：解淀粉芽孢杆菌脂肽类物质苹果斑点落叶病菌抑菌活性

Predicting indoor particle dispersion under dynamic ventilation modes with high-order Markov chain model

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Building Simulation 2022年第7期15卷 1243-1258页

作者： Xiong mei Chenni Zeng Guangcai gong School of Energy and Power Engineering Changsha University of Science and Technology960 Wonjiali South RoadChangsha 410114China School of Civil Engineering Hunan University2 Lushan South RoadChangsha 410082China

Mechanical and natural ventilations are effective measures to remove indoor airborne contaminants,thereby creating improved indoor air quality(IAQ).Among various simulation techniques,Markov chain model is a relatively new and efficient method in predicting indoor airborne *** existing Markov chain model(for indoor airborne pollutants)is basically assumed as first-order,which however is difficult to deal with airborne particles with non-negligible *** this study,a novel weight-factor-based high-order(second-order and third-order)Markov chain model is developed to simulate particle dispersion and deposition indoors under fixed and dynamic ventilation *** fields under various ventilation modes are solved by computational fluid dynamics(CFD)tools in advance,and then the basic first-order Markov chain model is implemented and validated by both simulation results and experimental data from ***,different groups of weight factors are tested to estimate appropriate weight factors for both second-order and third-order Markov chain ***,the calculation process is properly designed and controlled,so that the proposed high-order(second-order)Markov chain model can be used to perform particle-phase simulation under consecutively changed ventilation *** indicate that the proposed second-order model does well in predicting particle dispersion and deposition under fixed ventilation mode as well as consecutively changed ventilation *** with traditional first-order Markov chain model,the proposed high-order model performs with more reasonable accuracy but without significant computing cost *** most suitable weight factors of the simulation case in this study are found to be(λ_(1)=0.7,λ_(2)=0.3,λ_(3)=0)for second-order Markov chain model,and(λ_(1)=0.8,λ_(2)=0.1,λ_(3)=0.1)for third-order Markov chain model in terms of reducing errors in particle deposition and escape *** the improvements o

关键词： high-order Markov chain dynamic ventilation modes indoor particles particle dispersion fast prediction