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Tree mycorrhizal associations determine how biodiversity,large trees,and environmental factors drive aboveground carbon stock in temperate forests

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Forest Ecosystems 2024年第4期11卷 448-456页

作者： Yue Chen zikun m.o Jonathan A.myers Jinghua Yu Xugao Wang CAS Key Laboratory of Forest Ecology and Silviculture Institute of Applied EcologyChinese Academy of SciencesShenyang110016China University of Chinese Academy of Sciences Beijing100049China Key Laboratory of Terrestrial Ecosystem Carbon Neutrality Shenyang110016China Department of Biology Washington University in St.LouisSt.LouisMissouriUSA

Biodiversity,large trees,and environmental conditions such as climate and soil have im.ortant effects on forest carbon ***,recent studies in temperate forests suggest that the relative im.ortance of these factors depends on tree mycorrhizal associations,whereby large-tree effects may be driven by ectomycorrhizal(Em)trees,diversity effects may be driven by arbuscular mycorrhizal(Am)trees,and environment effects may depend on differential climate and soil preferences of Am and Em *** test this hypothesis,we used forest-inventory data consisting of over 80,000 trees from 631 temperate-forest plots(30 m×30 m)across Northeast China to examine how biodiversity(species diversity and ecological uniqueness),large trees(top 1%of tree diameters),and environmental factors(climate and soil nutrients)differently regulate aboveground carbon stocks of Am trees,Em trees,and Am and Em trees combined(*** aboveground carbon stock).We found that large trees had a positive effect on both Am and Em tree carbon ***,biodiversity and environmental factors had opposite effects on Am *** tree carbon ***,the two com.onents of biodiversity had positive effects on Am tree carbon stocks,but negative effects on Em tree carbon *** heterogeneity(mean annual temperature and soil nutrients)also exhibited contrasting effects on Am and Em tree carbon ***,for the total carbon stock,the positive large-tree effect far surpasses the diversity and environment *** is mainly because when integrating Am and Em tree carbon stock into total carbon stock,the opposite diversity-effect(also environment-effect)on Am *** tree carbon stock counteracts each other while the consistent positive large-tree effect on Am and Em tree carbon stock is *** summary,this study emphasized a mycorrhizal viewpoint to better understand the determinants of overarching aboveground carbon profile across regional forests.

关键词： Biodiversity Ecological uniqueness Environment heterogeneity Large trees mycorrhizal associations Tree carbon stock

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Comparative transcriptome analysis between rhesus macaques(macaca mulatta) and crab-eating macaques(m. fascicularis)

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Zoological Research 2024年第2期45卷 299-310页

作者： Yu-Xiang m.o Yamei Li zikun Yang Ning Xu Shilong Zhang Xuankai Wang Xiangyu Yang Qiang Sun Yafei m.o Institute of Neuroscience State Key Laboratory of NeuroscienceCenter for Excellence in Brain Science&Intelligence TechnologyChinese Academy of SciencesShanghai 200031China Shanghai Center for Brain Science and Brain-Inspired Intelligence Technology Shanghai 201210China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Genetic Evolution&Animal models Chinese Academy of SciencesKunmingYunnan 650201China Bio-X Institutes Key Laboratory for the Genetics of Developmental and Neuropsychiatric DisordersMinistry of EducationShanghai Jiao Tong UniversityShanghai 200030China Zhiyuan College Shanghai Jiao Tong UniversityShanghai 200240China Center for Genomic Research International Institutes of MedicineFourth Affiliated HospitalZhejiang UniversityYiwuZhejiang 322000China

Understanding gene expression variations between species is pivotal for deciphering the evolutionary diversity in phenotypes. Rhesus macaques(macaca mulatta, mmU)and crab-eating macaques(m. fascicularis, mFA) serve as crucial nonhuman primate biomedical models with different phenotypes. To date, however, large-scale comparative transcriptome research between these two species has not yet been fully explored. Here, we conducted systematic comparisons utilizing newly sequenced RNA-seq data from84 samples(41 mFA samples and 43 mmU samples)encompassing 14 com.on tissues. our findings revealed a small fraction of genes(3.7%) with differential expression between the two species, as well as 36.5% of genes with tissue-specific expression in both macaques. Comparison of gene expression between macaques and humans indicated that 22.6% of orthologous genes displayed differential expression in at least two tissues. moreover,19.41% of genes that overlapped with macaque-specific structural variants showed differential expression between humans and macaques. of these, the FAm220A gene exhibited elevated expression in humans compared to macaques due to lineage-specific duplication. In summary,this study presents a large-scale transcriptomic comparison between mmU and mFA and between macaques and humans. The discovery of gene expression variations not only enhances the biomedical utility of macaque models but also contributes to the wider field of primate genomics.

关键词： Crab-eating macaques Rhesus macaques Comparative transcriptomics Biomedical models Nonhuman primates RNA-seq Duplicated genes

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In situ photoelectric biosensing based on ultranarrowband near-infrared plasmonic hot electron photodetection

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Advanced Photonics 2024年第2期6卷 81-89页

作者： Xianghong Nan Wenduo Lai Jie Peng Haiquan Wang Bojun Chen Huifan He Zekang mo zikun Xia Ning Tan Zhong Liu Long Wen Dan Gao Qin Chen Jinan University College of Physics & Optoelectronic Engineering Institute of Nanophotonics Guangdong Provincial Key Laboratory of Nanophotonic Manipulation Tsinghua University Shenzhen International Graduate School State Key Laboratory of Chemical Oncogenomics Jinan University College of Life Science and Technology

Narrowband photodetection is an im.ortant measurement technique for material analysis and sensing, for example, nondispersive infrared sensing technique. Both photoactive material engineering and nanophotonic filtering schemes have been explored to realize wavelength-selective photodetection,while most devices have a responsive bandwidth larger than 2% of the operating wavelength, limiting sensing performance. Near-infrared photodetection with a bandwidth of less than 0.2% of the operating wavelength was demonstrated experimentally in Au/Si Schottky nanojunctions. A minimum linewidth of photoelectric response down to 2.6 nm was obtained at a wavelength of 1550 nm by carefully tailing the absorptive and radiative loss in the nanostructures. multiple functions were achieved on chip with the corrugated Au film, including narrowband resonance, light harvesting for sensing and photodetection, and electrodes for hot electron emission. Benefiting from such a unity integration with in situ photoelectric conversion of the optical sensing signal and the ultranarrowband resonance, self-contained on-chip biosensing via simple intensity interrogation was demonstrated with a limit of detection down to 0.0047%in concentration for glucose solution and 150 ng∕m L for rabbit IgG. Promising potential of this technique is expected for the applications in on-site sensing, spectroscopy, spectral imaging, etc.

关键词： Photodetectors Plasmonics Biosensing optical gratings Gold Absorption spectrum Acoustooptic tunable filters Absorption Sensors In situ remote sensing

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空气源热泵热水机抑霜性能预测模型研究

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建筑科学 2024年第2期40卷 49-55页

作者：张佳明孙育英魏文哲王伟李子坤北京工业大学绿色建筑环境与节能技术北京市重点实验室北京100124 北京石油化工学院安全工程学院北京102617

改善空气源热泵的抑霜性能对提升空气源热泵的供暖效果具有重要的意义,但由于缺少设计指导准则,热泵厂家无法通过压缩机、室外换热器和室外风机等核心部件的优化配置研发出抑霜型空气源热泵,导致现有空气源热泵整体抑霜性能差,实际供暖... 详细信息

改善空气源热泵的抑霜性能对提升空气源热泵的供暖效果具有重要的意义,但由于缺少设计指导准则,热泵厂家无法通过压缩机、室外换热器和室外风机等核心部件的优化配置研发出抑霜型空气源热泵,导致现有空气源热泵整体抑霜性能差,实际供暖过程中结除霜问题严重,供暖效果严重偏离预期。为了量化不同核心部件配置下空气源热泵的抑霜性能,本文对来自不同厂家的8台不同本构配置的空气源热泵热水机进行了实验研究,通过分析抑霜性能与本构配置之间的关系,建立了以制热能力衰减5%运行时长为评价指标的抑霜性能预测模型,该模型可有效预测不同本构配置下空气源热泵热水机的抑霜性能,相对误差在10%之内,为热泵厂家研发抑霜型机组提供参考。

关键词：空气源热泵抑霜性能本构配置预测模型结除霜

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新型激光加工微盲孔能力研究

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印制电路信息 2024年第10期32卷 1-10页

作者：罗炜艳曹子鲲上官昌平安捷利美维电子(厦门)有限责任公司福建厦门361026

现有Co_(2)激光无法满足印制电路板精细化布线对应的微小孔径加工要求,应开发其他类型激光钻孔。基于ABF、BT、PI这3种材料,探究355 nm纳秒紫外(Nano UV)、515 nm皮秒绿光(Pico Green)激光和248 nm ArF准分子激光3种激光加工微盲孔的能... 详细信息

现有Co_(2)激光无法满足印制电路板精细化布线对应的微小孔径加工要求,应开发其他类型激光钻孔。基于ABF、BT、PI这3种材料,探究355 nm纳秒紫外(Nano UV)、515 nm皮秒绿光(Pico Green)激光和248 nm ArF准分子激光3种激光加工微盲孔的能力。综合分析激光加工后孔径、锥度、悬铜、玻纤突出等关键指标表现,结果显示:Nano UV和准分子激光基于ABF、BT 2种材料可加工最小孔径为10μm,基于PI材料可加工最小孔径为15μm;Pico Green基于3种材料可加工最小孔径均为15μm。但Nano UV属于紫外波段纳秒激光器,加工带玻纤材料不具备优势。Pico Green更适用于加工带玻纤和带铜箔材料且加工后表观良好无溅铜。同时,3种激光对板材热效应影响均小于Co_(2)激光,材料形变差异在0.01%左右,对于密集区微盲孔加工友好。

关键词：高密度印制电路板激光钻孔 Nano UV激光 Pico Green激光准分子激光

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Long non-coding RNA mALAT1 modulates mycobacterial survival by altering m1/m2 macrophage polarization

Long non-coding RNA MALAT1 modulates mycobacterial survival ...

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第十三届全国免疫学学术大会

作者： zikun Huang Qing Luo Junming Li The First Affiliated Hospital of Nanchang University

Background: Recent studies have implicated long non-coding RNAs(lncRNAs) as regulators of many im.ortant biological processes. This study was aimed to investigate long non-coding RNA(lncRNA) mALAT1 in macrophage polarization and the regulatory mechanism functions in mycobacterium tuberculosis(mtb)-infected ***: We chose human monocyte-derived macrophages(mDms) stimulated by LPS and IFN-γ(m1) or IL-4(m2) as representative of the two opposite polarized states(m1 phenotype versus m2 phenotype). Quantitative real-time PCR was used to detect the expressions of lncRNA mALAT1 and mRNAs(NoS2, CXCL10, CXCL11, CCL17, and CCL18);ELISA was conducted for testing IL-12 and IL-10 expressions. To explore the expression of mALAT1 during mycobacterial infection, mDms were challenged with mtb H37 Rv. Real-time PCR was used to determine the expression level of mALAT1. Small interfering RNA(siRNA) was then used to knock down the expression of mALAT1 in order to determine the role of mALAT1 in intracellular growth of mtb and macrophage ***: mALAT1 was high expressed in m2 macrophages, when compared to m1 macrophages. mALAT1 expression was increased when m1 phenotype converted to m2, whereas it decreased when m2 phenotype converted to m1. Knockdown of mALAT1 in m2 macrophages promoted m1 polarization and diminished m2 phenotype expression. Furthermore, mALAT1 was significantly increased in macrophages after mtb infection. The mALAT1 siRNA significantly reduced the survival of intracellular mtb in macrophages. Knockdown of mALAT1 promoted m1 macrophage polarization but diminished m2 macrophage polarization in mtb-infected macrophages, thus decreasing the survival rate of intracellular mycobacteria. We found that mALAT1 modulates mtb-induced macrophage polarization by directly binding to miR-217 and inhibiting miR-217 ***: our results suggest that mALAT1 plays a significant role in regulating macrophage polarization and promotes mycobacteria

关键词： mycobacterium tuberculosis macrophage polarization LncRNAs mALAT1

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辣椒西瓜间作对辣椒田间小气候、农艺性状及产量的影响

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长江蔬菜 2024年第14期 61-64页

作者：张绍丽王友平张自坤段青青李腾飞张禄祺常培培德州市农业科学研究院山东德州253015

为探讨辣椒与西瓜的间作效应,在西瓜1.5 m宽行间间作2行辣椒,调查该间作模式下辣椒田间小气候、生长发育和产量,并分析间作模式的经济效益。结果表明,相比辣椒单作,辣椒与西瓜间作对辣椒田间小气候整体影响不大,但会促进辣椒生长,增加... 详细信息

为探讨辣椒与西瓜的间作效应,在西瓜1.5 m宽行间间作2行辣椒,调查该间作模式下辣椒田间小气候、生长发育和产量,并分析间作模式的经济效益。结果表明,相比辣椒单作,辣椒与西瓜间作对辣椒田间小气候整体影响不大,但会促进辣椒生长,增加辣椒鲜质量和干质量,辣椒产量虽有下降,但增收西瓜3361.68 kg/667 m^(2),纯收益增收52.09%。说明,辣椒、西瓜间作模式具有良好的经济效益,具有广阔的推广价值。

关键词：辣椒西瓜间作

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Identification of Differentially Expressed Long Non-coding RNAs in Polarized macrophages

Identification of Differentially Expressed Long Non-coding R...

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第十届全国免疫学学术大会

作者： zikun Huang Junming Li Qing Luo Jianqing Ye the First Affiliated Hospital of Nanchang University

objective:macrophages display remarkable plasticity,with the ability to undergo dynamic transition between m1 and m2 polarized *** non-coding RNAs(lnc RNAs)are more than 200 nucleotides in length and play roles in various biological ***,the role of lnc RNAs in regulating macrophage polarization has yet to be ***:In this study,lnc RNAs expression profiles were determined in monocyte-derived macrophages(mDms)incubated in conditions causing activation toward m1 or m2 ***:Compared with primary mDms,9343 lnc RNAs and 5903 m RNAs were deregulated in m1 group(fold change≥2.0,Pm RNAs were deregulated in m2 *** was worth noting that 326 lnc RNAs and 275m RNAs were deregulated between three ***-q PCR results were generally consistent with the microarray ***,we found that lnc RNA UIAA is expressed at a higher level in m1 macrophages than in m2 *** RNA UIAA expression was decreased when m1 converted to m2 whereas increased when m2 converted to *** of lnc RNA UIAA in m1 macrophages diminished m1 phenotype expression,and promoted m2 ***:These data show a significantly altered lnc RNA and m RNA expression profile in macrophage exposure todifferent activating *** of some of these lnc RNAs may play im.ortant roles in regulating macrophage polarization.

关键词： macrophage Activation LncRNA mRNA Gene expression

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德州地区小型西瓜品种露地种植比较

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浙江农业科学 2024年第5期65卷 1072-1074页

作者：张绍丽常培培黄磊韩梅梅段青青张自坤徐光东王友平德州市农业科学研究院山东德州253015 德州市农业综合执法支队山东德州253000

为了筛选适宜德州地区露地种植的小型西瓜品种,从出苗率、定植成活率、生长势、抗病性、果实性状及品质、产量等方面对参试西瓜品种进行比较。结果显示,ZXH出苗率和定植成活率较高,都在90%以上,果实发育期短为28 d,生长势最强,发病率最... 详细信息

为了筛选适宜德州地区露地种植的小型西瓜品种,从出苗率、定植成活率、生长势、抗病性、果实性状及品质、产量等方面对参试西瓜品种进行比较。结果显示,ZXH出苗率和定植成活率较高,都在90%以上,果实发育期短为28 d,生长势最强,发病率最低为3.3%,中心糖和边糖含量梯度差最小,整体糖含量较高,单瓜重、小区产量、折合667 m^(2)产量最高。ZT2693-11出苗率稍低,但定植成活率高,生长势较强,发病率较低,果实发育期最短,只有26 d,果皮薄,果实为短椭圆形,中心糖含量10.20%,边糖含量9.00%,品质好,产量高,ZXH和ZT2693-11适合在德州地区推广种植。

关键词：西瓜小型露地比较试验

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布朗运动数学研究中的若干进展

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数学物理学报（A辑） 2010年第5期30卷 1242-1247页

作者：王梓坤北京师范大学数学学院北京100875

该文综述布朗运动数学研究中的若干新进展,主要讨论高维布朗运动首中与末离的分布;趋于无穷远的行为;以及多参数无穷维布朗运动的一些性质.

关键词：首中末离极大游程多参数

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