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Rare Metals 2021年第12期40卷 3494-3500页

作者： Hai-Feng huang Yi-Na Gui Fu Sun Zhi-Jian liu Hui-long Ning Chen wu li-Bao Chen State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China Institute of Bioenergy and Bioprocess Technology Chinese Academy of SciencesQingdao 266101China

The practical application of the lithium anode in lithium metal batteries(LMBs) has been hindered by the uncontrollable growth of lithium dendrite and the high volumetric change during cycling. Herein, the in situ formed three-dimensional(3D) lithium-boron(li-B) alloy is suggested as an excellent alternative to the li metal, in which the 3D li B skeleton can mitigate the growth of li dendrites and volumetric change. In this study, the li-B alloy anodes with different B contents were manufactured by high-temperature melting. It was found that the boron content had a significant effect on the electrochemical performance of the li-B alloy. The li-B alloy with the least B content(10 wt%, 10liB) demonstrated the lowest overpotential of 0.0852 V after 300 h and the lowest interface resistance. However, the full cell with 15liB as the anode displayed the best cycling performance of 115 m Ah·g^(-1) after 100 cycles with a columbic efficiency greater than 97%. The obtained results suggest that the in situ formed three-dimensional li-B alloy anode can be an excellent alternative to the li anode via tuning B contents for next-generation high energy density LMBs.

关键词： li-B alloy 3D skeleton Solid electrolyte interface(SEI) Anode lithium metal battery

乌梅丸调控Keap-1-Nrf2/HO-1信号通路抑制溃疡性结肠炎小鼠氧化应激损伤

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中国临床药理学杂志 2024年第14期40卷 2088-2092页

作者：杜丽东王颖辛蕊华仇正英赵冠宇李能莲邵晶吴国泰甘肃中医药大学药学院甘肃兰州730000 甘肃中医药大学陇药产业创新研究院甘肃兰州730000 中国农业科学院兰州畜牧与兽药研究所甘肃兰州730050

目的研究乌梅丸调控Kelch样ECH相关蛋白1(Keap-1)-核因子E2相关因子2(Nrf2)/血红素加氧酶1(HO-1)信号通路对葡聚糖硫酸钠(DSS)诱导的溃疡性结肠炎(UC)小鼠氧化应激损伤的抑制作用。方法将40只C57BL/6J小鼠随机分为正常组、模型组、阳性... 详细信息

目的研究乌梅丸调控Kelch样ECH相关蛋白1(Keap-1)-核因子E2相关因子2(Nrf2)/血红素加氧酶1(HO-1)信号通路对葡聚糖硫酸钠(DSS)诱导的溃疡性结肠炎(UC)小鼠氧化应激损伤的抑制作用。方法将40只C57BL/6J小鼠随机分为正常组、模型组、阳性对照组、低剂量实验组和高剂量实验组,每组8只。自由饮用2%DSS水溶液的方法复制UC模型。造模同时,正常组和模型组小鼠灌胃等体积0.9%NaCl,阳性对照组小鼠灌胃美沙拉嗪(5-ASA)溶液0.005 g·10 g^(-1)·d^(-1),低、高剂量实验组小鼠分别灌胃乌梅丸水煎液0.13、0.26 g·10 g^(-1)·d^(-1),持续7 d。评价小鼠疾病活动指数(DAI)和结肠长度变化;用实时荧光定量聚合酶链反应检测小鼠结肠组织超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、环氧酶2(COX-2)、诱导型一氧化氮合酶(iNOS)mRNA表达水平;用蛋白质印迹法检测小鼠结肠Kelch样ECH相关蛋白(Keap-1)、核因子E2相关因子2(Nrf2)、血红素加氧酶-1(HO-1)蛋白的表达水平。结果正常组、模型组、阳性对照组和低、高剂量实验组第7天的DAI分别为0、2.62±0.33、1.87±0.35、1.87±0.35和1.58±0.35,结肠长度分别为(8.16±0.47)、(5.98±0.24)、(7.58±0.38)、(7.33±0.24)和(7.48±0.51)cm,SOD mRNA表达水平分别为1.01±0.16、0.40±0.01、1.43±0.45、0.65±0.01和0.83±0.02,CAT mRNA表达水平分别为1.01±0.20、0.45±0.01、0.84±0.02、0.68±0.07和0.87±0.05,COX-2 mRNA表达水平分别为1.03±0.33、16.65±0.60、4.78±0.25、14.07±0.60和7.39±0.15,iNOS mRNA表达水平分别为1.04±0.40、20.71±0.66、8.09±0.93、15.44±0.68和11.66±0.06,Keap-1蛋白表达水平分别为1.22±0.16、1.10±0.05、1.18±0.05、1.94±0.08和1.17±0.08,Nrf2蛋白表达水平分别为1.12±0.16、0.76±0.15、0.65±0.13、0.70±0.16和0.82±0.18,HO-1蛋白表达水平分别为1.34±0.15、1.00±0.12、0.89±0.10、1.50±0.18和1.40±0.13。模型组的上述指标与正常组比较,低、高剂量实验组的上述指标与模型组比较,在统计学上差异均有统计学意义(P<0.01,P<0.05)。结论乌梅丸对溃疡性结肠炎小鼠具有抗氧化应激损伤作用,其作用机制可能与调节结肠Keap-1-Nrf2/HO-1信号通路蛋白表达有关。

关键词：乌梅丸溃疡性结肠炎 Kelch-样ECH相关蛋白1-核因子E2相关因子2/血红素加氧酶1信号通路氧化应激损伤

青黑杨杂种全同胞二倍体与三倍体长枝叶性状变异研究

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北京林业大学学报 2024年第1期46卷 27-34页

作者：马鸿文任宇昕龙羿辛王楠冯祥元俞天泉华晓琴王君林木遗传育种全国重点实验室林木育种与生态修复国家工程研究中心林木花卉遗传育种教育部重点实验室北京林业大学生物科学与技术学院北京100083 武威市林业综合服务中心甘肃武威733200

【目的】探明青黑杨杂种全同胞二倍体与三倍体植株的扦插苗长枝叶叶片和气孔性状的遗传变异规律,解析基因型效应和倍性效应对长枝叶性状的影响。【方法】以‘哲引3号杨’×‘北京杨’杂种全同胞二倍体和三倍体扦插苗为材料,对其长枝叶... 详细信息

【目的】探明青黑杨杂种全同胞二倍体与三倍体植株的扦插苗长枝叶叶片和气孔性状的遗传变异规律,解析基因型效应和倍性效应对长枝叶性状的影响。【方法】以‘哲引3号杨’×‘北京杨’杂种全同胞二倍体和三倍体扦插苗为材料,对其长枝叶叶片和气孔性状的变异情况进行分析。【结果】长枝叶叶片长度、叶片宽度、叶片长宽比、叶面积、叶柄长度、叶绿素含量、气孔长度、气孔宽度、气孔密度等性状在不同基因型间存在极显著差异,各性状的变异系数范围为8.54%~36.20%,重复力介于0.645~0.916之间,表明叶片及气孔性状受到较强的遗传控制。三倍体群体叶片的叶绿素含量极显著高于二倍体,气孔长度、气孔宽度极显著大于二倍体,气孔密度极显著小于二倍体,而不同倍性群体间其他叶片各性状间未发现显著性差异。尽管如此,并非所有的三倍体基因型均显示出更优的性状表现。相关性分析显示,叶片长度与叶片宽度、叶面积和叶柄长度间相互均呈极显著正相关;叶绿素含量、气孔长度和气孔宽度间相互呈极显著正相关,均与气孔密度呈极显著负相关。进一步分析发现,叶片长度、叶片宽度、叶面积、叶柄长度等叶片性状主要受基因型效应影响,其基因型方差贡献率在59.5%~76.8%之间,叶绿素含量和气孔长度、气孔宽度、气孔密度等性状主要受倍性效应所影响,其倍性效应方差贡献率在46.0%~78.0%之间。【结论】青黑杨杂种全同胞二倍体及三倍体5月龄扦插苗长枝叶叶片和气孔性状受到不同程度的基因型效应和倍性效应的共同影响,基因型间存在丰富的性状变异,三倍体也并非株株皆优,杨树异源三倍体育种需秉持“大群体,强选择”理念。

关键词：杨树异源三倍体叶片性状气孔性状倍性效应基因型效应

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一种非接触式的雨量筒液位检测方法

自动化与仪表 2024年第10期39卷 101-104页

作者：吴垠锋周骅赵麒贵州大学大数据与信息工程学院贵阳550025 贵州民族大学机械电子工程学院贵阳550025

雨量筒是一种用来测量降水量的简单而有效的装置。它通常成一个圆柱形,用于收集和记录降水量。以雨量筒为研究对象,该文提出一种非接触式液位检测的方法。以双向桥电路结构为基础,将发射的射频信号转换为便于分析的差分电压值;通过高速... 详细信息

雨量筒是一种用来测量降水量的简单而有效的装置。它通常成一个圆柱形,用于收集和记录降水量。以雨量筒为研究对象,该文提出一种非接触式液位检测的方法。以双向桥电路结构为基础,将发射的射频信号转换为便于分析的差分电压值;通过高速ADC将信号采集,在FPGA内对采集回来的差分电压值进行近一步数学转换,得到回波损耗值,并实现数据拟合供下一次测量使用。经过测试后,验证了采用射频信号对非接触式液位检测是可行有效的。同时该方法提高了液位检测安全性、检测效率以及检测精度,误差小于0.5 mm,具备良好的工程应用价值。

关键词：双向桥电路雨量筒数据拟合回波损耗

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湘江流域制造业企业时空演化特征及影响因素

湖南师范大学自然科学学报 2024年第3期47卷 72-81页

作者：宋文伍周国华宋关东吕昕刘彬丁粤麟杨京伟湖南师范大学地理科学学院长沙410081 湖南师范大学地理空间大数据挖掘与应用湖南省重点实验室长沙410081 湖南师范大学湖南师范大学城乡转型过程与效应重点实验室长沙410081

湘江流域作为国家重要先进制造业高地的核心区域和国家流域环境污染综合治理的重点试验区,如何促进其制造业绿色高质量可持续发展是值得探讨的重要议题。本文运用空间统计分析和地理探测器等方法探析了湘江流域1978—2021年制造业企业... 详细信息

湘江流域作为国家重要先进制造业高地的核心区域和国家流域环境污染综合治理的重点试验区,如何促进其制造业绿色高质量可持续发展是值得探讨的重要议题。本文运用空间统计分析和地理探测器等方法探析了湘江流域1978—2021年制造业企业时空演化特征及影响因素,结果表明:(1)流域制造业企业总量和增量均呈增长趋势,具有明显的阶段性特征;结构则由污染型为主转型为以清洁型为主,但污染型企业仍占一定比重。(2)传统机械制造业逐步向高附加值、低污染的装备制造业演进,产业升级态势明显,但流域制造业结构整体仍以重化工业为主,并呈下游“重”于中上游的区段差异特征。(3)流域制造业企业集聚度提升,集聚程度沿江自下游向上游递减,空间分布态势由以长株潭三市中心城区为核心,衡阳市为次级增长极的“一核一极”格局演进为以长株潭三市中心城区为核心,以核心边缘“宁乡—湘乡—醴陵—浏阳—湘阴”连接带为环带,以邵阳、衡阳为次级增长极的“一核一带两极”格局。(4)基于“污染—要素”密集程度划分的6大类型制造业企业多以下游长株潭都市圈为核心,呈资本和技术密集型往核心集聚、劳动和污染密集型往环带和中上游扩散集聚的趋势。(5)政策扶持和创新能力对湘江流域制造业企业快速增长阶段布局影响较强,生产成本、自然条件和城市功能次之,社会经济因素影响较弱。但受产业特性影响,不同因子对不同类型制造业的影响程度存在明显差异。

关键词：制造业时空演变企业数据湘江流域

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宦湘作家吴镇对集句诗的认识及其集句诗创作

怀化学院学报 2024年第2期43卷 75-79页

作者：曹艳华杨齐怀化学院湖南怀化418008

吴镇是清中期集句诗创作的代表作家之一,他对集句诗的功能和创作有着明确的认识,其集句诗题材广泛,体式完备,裁剪随心,工巧自然,意境悠远,取得了较高的艺术成就。吴镇于乾隆后期曾任湖南沅州知府,宦湘期间受湖湘山水的影响,创作了《沅... 详细信息

吴镇是清中期集句诗创作的代表作家之一,他对集句诗的功能和创作有着明确的认识,其集句诗题材广泛,体式完备,裁剪随心,工巧自然,意境悠远,取得了较高的艺术成就。吴镇于乾隆后期曾任湖南沅州知府,宦湘期间受湖湘山水的影响,创作了《沅州杂咏》和《潇湘八景》两组专题集句诗,在一定程度上推动了清中期集句诗走向繁荣,推动了湖湘文学发展。

关键词：吴镇集句诗《沅州杂咏》和《潇湘八景》

Plasma membrane lipid scrambling causing phosphatidylserine exposure negatively regulates NK cell activation

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Cellular & Molecular Immunology 2021年第3期18卷 686-697页

作者： Ning wu hua Song Andre Veillette Laboratory of Molecular Oncology Institut de recherches cliniques de Montreal(IRCM)MontrealQC H2W1R7Canada Department of Immunology School of Basic MedicineTongji Medical CollegeHuazhong University of Science and Technology(HUST)WuhanChina Department of Medicine University of MontrealMontrealQC H3C3J7Canada Department of Medicine McGill UniversityMontrealQC H3G 1Y6f Canada

One of the hallmarks of live cells is the asymmetric distribution of lipids across their plasma *** in this asymmetry due to lipid"scrambling"result in phosphatidylserine exposure at the cell surface that is detected by annexin V *** alteration is observed during cell death processes such as apoptosis,and during physiological responses such as platelet degranulation and membrane *** studies have shown that activation of NK cells is accompanied by exposure of phosphatidylserine at the cell *** this response was thought to be indicative of ongoing NK cell death,it may also reflect the regulation of NK cell activation in the absence of cell ***,we found that NK cell activation was accompanied by rapid phosphatidylserine exposure to an extent proportional to the degree of NK cell *** enforced expression of a lipid scramblase,we provided evidence that activation-induced lipid scrambling in NK cells is reversible and does not lead to cell *** contrast,lipid scrambling attenuates NKcell *** response was accompanied by reduced cell surface expression of activating receptors such as 2B4,and by loss of binding of Src family protein tyrosine kinases Fyn and Lck to the inner leaflet of the plasma ***,lipid scrambling during NK cell activation is,at least in part,a physiological response that reduces the NK cell activation *** effect is due to the ability of lipid scrambling to alter the distribution of membrane-associated receptors and kinases required for NK cell activation.

关键词： NK cell activation Phosphatidylserine exposure lipid scrambling TMEM16F Signaling

Spatial-temporal changes and driving factors of eco-environmental quality in the Three-North region of China

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Journal of Arid Land 2023年第3期15卷 231-252页

作者： long Yi JIANG Fugen DENG Muli WANG Tianhong SUN hua Research Center of Forestry Remote Sensing&Information Engineering Central South University of Forestry and TechnologyChangsha 410004China Key Laboratory of Forestry Remote Sensing Based Big Data&Ecological Security for Hunan Province Changsha 410004China Key Laboratory of National Forestry&Grassland Administration on Forest Resources Management and Monitoring in Southern Area Changsha 410004China

Eco-environmental quality is a measure of the suitability of the ecological environment for human survival and socioeconomic *** the spatial-temporal distribution and variation trend of eco-environmental quality is essential for environmental protection and ecological *** remote sensing ecological index(RSEI)can quickly and objectively quantify eco-environmental quality and has been extensively utilized in regional ecological environment *** this paper,Moderate Resolution Imaging Spectroradiometer(MODIS)images during the growing period(July-September)from 2000 to 2020 were obtained from the Google Earth Engine(GEE)platform to calculate the RSEI in the three northern regions of China(the Three-North region).The Theil-Sen median trend method combined with the Mann-Kendall test was used to analyze the spatial-temporal variation trend of eco-environmental quality,and the Hurst exponent and the Theil-Sen median trend were superimposed to predict the future evolution trend of eco-environmental *** addition,ten variables from two categories of natural and anthropogenic factors were analyzed to determine the drivers of the spatial differentiation of eco-environmental quality by the geographical *** results showed that from 2000 to 2020,the RSEI in the Three-North region exhibited obvious regional characteristics:the RSEI values in Northwest China were generally between 0.2 and 0.4;the RSEI values in North China gradually increased from north to south,ranging from 0.2 to 0.8;and the RSEI values in Northeast China were mostly above *** average RSEI value in the Three-North region increased at an average growth rate of 0.0016/a,showing the spatial distribution characteristics of overall improvement and local degradation in eco-environmental quality,of which the areas with improved,basically stable and degraded eco-environmental quality accounted for 65.39%,26.82%and 7.79%of the total study area,*** Hurst

关键词： eco-environmental quality remote sensing ecological index Google Earth Engine Hurst exponent geographical detector Three-North region of China

Seasonal variability of turbulent heat fluxes in the tropical Atlantic Ocean based on WHOI flux product

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Acta Oceanologica Sinica 2007年第5期26卷 1-11页

作者： JIANG hua WANG Hui wu Dexing Institute of Climate System Chinese Academy of Meteorological Sciences Beijing 100081 China Institute of Physical Oceanography Ocean University of China Qingdao 266003 China

The mean seasonal variability of turbulent heat fluxes in the tropical Atlantic Ocean is examined using the Woods Hole Oceanographic Institution （WHOI） flux product. The most turbulent heat fluxes occur during winter seasons in the two hemispheres, whose centers are located at 10° -20°N and 5° 15°S respectively. In climatological ITCZ, the turbulent heat fluxes are the greatest from June to August, and in equatorial cold tongue the turbulent heat fluxes are the greatest from March to May. Seasonal variability of sensible heat flux is smaller than that of latent heat flux and mainly is dominated by the variations of air-sea temperature difference. In the region with larger climatological mean wind speed （air-sea humidity difference）, the variations of air-sea humidity difference （wind speed） dominate the variability of latent heat flux. The characteristics of turbulent heat flux yielded from theory analysis and WHOI dataset is consistent in physics which turns out that WHOI＇ s flux data are pretty reliable in the tropical Atlantic Ocean.

关键词： turbulent heat fluxes seasonal variation tropical Atlantic

“文化外交”视野下的新中国舞蹈国际影响力研究(1949—1966年)

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北京舞蹈学院学报 2024年第2期168卷 66-72页

作者：武艳北京舞蹈学院人文学院北京100081

“文化外交”是新中国外交的重要策略之一,它具有双向性、柔和性、长期性和软约束力等特点,有利于促进国家和地区之间的理解、交流与合作,更能为新中国缓解紧张局势,在国家之间建立对话与信任。舞蹈艺术作为我国“文化外交”的重要组成... 详细信息

“文化外交”是新中国外交的重要策略之一,它具有双向性、柔和性、长期性和软约束力等特点,有利于促进国家和地区之间的理解、交流与合作,更能为新中国缓解紧张局势,在国家之间建立对话与信任。舞蹈艺术作为我国“文化外交”的重要组成部分,围绕着新中国外交的三条主线:首先,与苏联和社会主义国家的双向互动中,舞蹈交流巩固了社会主义国家之间的同盟,通过在世界青年联欢节上摘金夺银的舞蹈作品,树立良好的国家形象。其次,面对亚非拉第三世界国家,舞蹈以“文化合作”的方式形成具有国际化色彩的“东方歌舞”,在彼此理解的文化认同中,增进中国与亚非拉国家的信任。第三,这个时期中国舞蹈通过“文化建构”向资本主义国家树立新中国形象,成为与资本主义国家文化交流的窗口之一。1949-1966年,在“文化外交”的语境下,新中国舞蹈以“文化的形态”,担负着“政治的使命”。在国际交往中,舞蹈为树立国家形象、获得文化认同、建构文化共识等方面,做出突出的贡献。

关键词：文化外交新中国舞蹈国家形象文化认同文化建构