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Do Strigolactones Regulate Bud Winter Dormancy and Charactrisitc Secondary Metabolism in Tea?

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Phyton-International Journal of Experimental Botany 2021年第1期90卷 65-73页

作者： Lin Feng ziming gong Guofeng Liu Yanli Liu Institute of Fruit and Tea Hubei Academy of Agricultural Science/Hubei Tea Engineering and Technology Research CentreWuhan430064China College of Life Sciences Xinyang Normal UniversityXinyang464000China

Tea(Camellia sinensis[L.]O.Kuntze.)is an important cash crop,which mainly uses tender shoots and young leaves for manufacturing.Due to the marketing characteristic that earlier made tea has higher price,the time of the breaking of winter dormancy buds in spring is extremely important in tea industry.Strigolactones are a group of carotenoids-derived metabolites which regulates bud outgrowth,shoot branching,tiller angle and environmental stress responses.The role of strigolactones in tea plant was briefly summarized in the current review,with an emphasis of the association of strigolactones on bud ecodormancy and shoot branching.The involvement of strigolactones on the biosynthesis of the tea characteristic metabolites flavonoids,caffeine and theanine were also discussed.Moreover,recent advances on the biosynthesis of strigolactones and its regulation by microRNAs and environmental stresses were also presented.This review provides a basis for future investigations underlying the mechanisms of strigolactones on bud winter dormancy and tea secondary metabolism.

关键词： Camellia sinensis strigolactones winter dormancy secondary metabolites

海岸带城市蓝绿空间碳汇基础设施网络分析——以广西北部湾为例

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广西科学 2024年第2期31卷 213-223页

作者：李萱龚苑红覃盟琳朱梓铭广西大学林学院广西南宁530004 广西大学土木建筑工程学院广西南宁530004 广西大学土木建筑工程学院人居环境设计研究中心广西南宁530004

为探讨蓝绿基础设施(Blue-Green Infrastructure,BGI)碳汇服务功能有益于指引城市碳中和目标建设,本研究以广西北部湾海岸带城市为例,运用形态学空间格局分析(Morphological Spatial Pattern Analysis,MSPA)法、连通性分析法以及电路理... 详细信息

为探讨蓝绿基础设施(Blue-Green Infrastructure,BGI)碳汇服务功能有益于指引城市碳中和目标建设,本研究以广西北部湾海岸带城市为例,运用形态学空间格局分析(Morphological Spatial Pattern Analysis,MSPA)法、连通性分析法以及电路理论,构建蓝绿基础设施碳汇网络,讨论对应的固碳增汇对策。结果表明:2020年研究区蓝绿空间碳汇总量为735524.09 tC·a^(-1),其中绿色空间碳汇总量为588680.06 tC·a^(-1),蓝色空间碳汇总量为146844.03 tC·a^(-1),单位面积碳汇量“蓝”高于“绿”;共提取63个碳汇源地斑块,20个核心源地斑块,绿色空间核心源地总面积为6814.31 km^(2),蓝色空间为899.05 km^(2),核心源地主要分布在东西两侧及南部沿海地带;共提取出24条生态廊道,绿廊共长122.21 km,蓝廊为52.75 km,呈环状分布,中南部地区分布较密,连通性强。本研究结果可为“碳达峰与碳中和”(简称“双碳”)背景下海岸带城市的保护与可持续发展提供建设思路。

关键词：海岸带城市蓝绿空间碳汇基础设施广西北部湾形态学空间格局分析电路理论

天津市高校学生艾滋病知信行现状及高危性行为影响因素

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中国学校卫生 2024年第2期45卷 203-206,212页

作者：刘轶柳忠泉武子明龚卉柏建芸于茂河天津市疾病预防控制中心性病艾滋病预防控制所 300011 天津市传染病病原微生物重点实验室

目的了解天津市高等院校学生艾滋病知信行现状和高危性行为的影响因素,为艾滋病精准防治提供科学依据。方法2022年11—12月,采用分层整群随机抽样方法调查天津市56所高等院校64697名学生艾滋病知信行现状,采用问卷星开展网络问卷调查。... 详细信息

目的了解天津市高等院校学生艾滋病知信行现状和高危性行为的影响因素,为艾滋病精准防治提供科学依据。方法2022年11—12月,采用分层整群随机抽样方法调查天津市56所高等院校64697名学生艾滋病知信行现状,采用问卷星开展网络问卷调查。描述性分析高校学生艾滋病知信行现状,应用χ^(2)检验和多因素Logistic回归模型分析高校学生高危性行为的影响因素。结果天津市高校学生艾滋病防治知识知晓人数达到87.33%,性态度开放人数为70.73%。在最近一年发生过性行为的3463名学生中,42.13%发生过高危性行为。多因素Logistic回归分析结果显示,女性、有恋爱对象、接受过性教育以及艾滋病防治知识与高危性行为均呈负相关(OR值分别为0.66,0.59,0.81,0.59,P值均<0.05);大二年级、非异性恋(同性恋、双性恋、不知道)、对艾滋病存在认知偏见以及错误了解艾滋病检测方式与高危性行为均呈正相关(OR值分别为1.22,2.49,2.30,3.17,1.43,1.22,P值均<0.05)。结论天津市高校学生艾滋病知晓率较高,但高危性行为仍处于较高水平。需进一步有针对性开展宣传教育和行为干预,控制艾滋病传播流行。

关键词：获得性免疫缺陷综合征健康知识态度实践回归分析学生

微量Te对Cu-Cr-Zr合金组织及性能的影响

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热加工工艺 2024年第8期53卷 128-134页

作者：邓立勋龚留奎尹飞黄滢秋张延松陈子明黄伟张保元中国兵器科学研究院宁波分院浙江宁波315103 宁波表面工程研究院有限公司浙江宁波315103 陆军装备部驻南京地区军事代表局驻烟台地区军事代表室山东烟台264000 95965部队河北故城253800

采用SEM、EDS等微观表征以及显微硬度和导电性能检测手段,研究了Te含量对Cu-Cr-Zr-Te合金铸态组织及性能的影响。结果表明:随着Te含量的增加,铸态Cu-Cr-Zr-Te合金的硬度呈逐渐升高的的趋势,但导电性能基本趋于稳定状态,热锻处理后合金... 详细信息

采用SEM、EDS等微观表征以及显微硬度和导电性能检测手段,研究了Te含量对Cu-Cr-Zr-Te合金铸态组织及性能的影响。结果表明:随着Te含量的增加,铸态Cu-Cr-Zr-Te合金的硬度呈逐渐升高的的趋势,但导电性能基本趋于稳定状态,热锻处理后合金的硬度和导电率都有所上升。铸态Cu-Cr-Zr-Te合金中低含量Te与Zr结合力较强易形成CuZrTe化合物,提升Te含量倾向于形成CuCrTe化合物;合金经900℃/4h的保温、热锻处理后,CuCrTe化合物分解为富Te相和富Cr相造成基体中Te元素的贫化,导致元素Te与元素Cr的相对比例减小而形成CuZrTe化合物。

关键词： Cu-Cr-Zr-Te 硬度 CuZrTe化合物 CuCrTe化合物富Cr相

CD301b^(+) macrophages mediate angiogenesis of calcium phosphate bioceramics by CaN/NFATc1/VEGF axis

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Bioactive Materials 2022年第9期7卷 446-455页

作者： Jiaolong Wang Qin Zhao Liangliang Fu Shihang Zheng Can Wang Litian Han Zijian gong ziming Wang Hua Tang Yufeng Zhang The State Key Laboratory Breeding Base of Basic Science of Stomatology(Hubei-MOST)and Key Laboratory of Oral Biomedicine Ministry of EducationSchool&Hospital of StomatologyWuhan UniversityWuhan430079HubeiPR China Institute of Infection and Immunity Science and Technology Innovation CenterShandong First Medical University&Shandong Academy of Medical SciencesJinan250000ShandongPR China Medical Research Institute School of MedicineWuhan UniversityWuhan430071HubeiPR China

Calcium phosphate(CaP)bioceramics are important for tissue regeneration and immune response,yet how CaP bioceramics influence these biological processes remains unclear.Recently,the role of immune cells in biomaterial-mediated regeneration,especially macrophages,has been well concerned.CD301b^(+)macrophages were a new subset of macrophages we have discovered,which were required for bioceramics-mediated bone regeneration.Nevertheless,the impact of CD301b^(+)macrophages on angiogenesis,which is a vital prerequisite to bone formation is yet indistinct.Herein,we found that CD301b^(+)macrophages were closely correlated to angiogenesis of CaP bioceramics.Additionally,depletion of CD301b^(+)macrophages led to the failure of angiogenesis.We showed that store-operated Ca^(2+)entry and calcineurin signals regulated the VEGF expression of CD301b^(+)macrophages via the NFATc1/VEGF axis.Inhibition of calcineurin effectively impaired angiogenesis via decreasing the infiltration of CD301b^(+)macrophages.These findings provided a potential immunomodulatory strategy to optimize the integration of angiogenesis and bone tissue engineering scaffold materials.

关键词： Calcium phosphate ceramics Macrophage Angiogenesis CD301b Calcineurin

Optical properties and cooling performance analyses of single-layer radiative cooling coating with mixture of TiO_(2) particles and SiO_(2) particles

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Science China(Technological Sciences) 2021年第5期64卷 1017-1029页

作者： CHENG ziming SHUAI Yong gong DaYang WANG FuQiang LIANG HuaXu LI GuiQiang School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001China School of New Energy Harbin Institute of Technology at WeihaiWeihai 264209China Key Laboratory of Aerospace Thermophysics Ministry of Industry and Information TechnologyHarbin 150001China School of Engineering University of HullHull HU67RXUK

Radiative cooling can achieve cooling effect without consuming any energy by delivering energy into outer space(3K) through"atmospheric window"(8–13 μm). Conventional radiative cooling coating with multi-layer structure was severely restricted during application due to its complex preparation process and high cost. In this study, a single-layer radiative cooling coating with mixture of TiO_(2) particles and SiO_(2) particles was proposed. The algorithm for calculating the radiative properties of the multi-particle system was developed. Monte Carlo ray-tracing method combined with that algorithm was used to solve the radiative transfer equation(RTE) of the single-layer radiative cooling coating with mixture of TiO_(2) particles and SiO_(2) particles.The effects of particle diameter, volume fraction and coating thickness on radiative cooling performance were analyzed to obtain the best radiative cooling performance. The numerical results indicated that the average reflectivity of the single-layer radiative cooling coating with mixture of TiO_(2) particles and SiO_(2) particles in the solar spectrum can reach 95.6%, while and the average emissivity in the "atmospheric window" spectrum can reach 94.9% without additional silver-reflectance layer. The average reflectivity in the solar spectrum and average emissivity in the "atmospheric window" spectrum of the single-layer radiative cooling coating with mixture of TiO_(2) particles and SiO_(2) particles can increase 4.6% and 4.8% compared to the double-layer radiative cooling coating. This numerical research results can provide a theoretical guidance for design and optimization of single-layer radiative cooling coatings containing mixed nanoparticles.

关键词： radiative cooling optical property multi-particles cooling performance radiative transfer atmospheric window

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基于集成学习的太阳质子事件短期预报方法

空间科学学报 2022年第3期42卷 340-345页

作者：宫哲邹自明陆阳中国科学院国家空间科学中心北京100190 中国科学院大学北京100049

太阳质子事件是一种由太阳活动爆发时喷射并传播到近地空间的高能粒子引起的空间天气现象。这些高能粒子会对航天器和宇航员产生严重危害,对太阳质子事件进行准确的短期预报是航天活动灾害预防的重要内容。针对当前主要预报模型中普遍... 详细信息

太阳质子事件是一种由太阳活动爆发时喷射并传播到近地空间的高能粒子引起的空间天气现象。这些高能粒子会对航天器和宇航员产生严重危害,对太阳质子事件进行准确的短期预报是航天活动灾害预防的重要内容。针对当前主要预报模型中普遍存在的高虚报率问题,提出了一种基于集成学习的太阳质子事件短期预报方法,利用第23个太阳活动周数据,建立了一种集成8种机器学习模型的太阳质子事件短期预报系统。实验结果表明,本文方法在取得了80.95%的报准率的同时,将虚报率降低至19.05%,相比现有的预报系统具有较为明显的优势。

关键词：太阳质子事件短期预报集成学习虚报率

Mo Yan: Will Literature Make Humans Less Greedy?

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China Today 2019年第5期68卷 64-67页

作者： gong ziming 不详

MO Yan, winner of the 2012 Nobel Prize in Literature, is hailed as a writer who merges hallucinatory realism with folk tales, and the past with the present. Since he published his first novel Falling Rain on a Spring Night in 1981, Mo has again and again expanded the breadth and depth of the narrative of Chinese stories, from his earlier works Red Sorghum, to Life and Death Are Wearing Me out and Frog , then to his recent writings such as A Gorgeous Robe (play script) and Seven Stars Shine on Me (poems).

关键词： Mo Yan Literature Greedy

Weipixiao ameliorates gastric precancerous lesions in a rat's model by regulating GSK3β and C-myc

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Journal of Traditional Chinese Medicine 2018年第5期38卷 705-713页

作者： Zeng Jinhao Pan Huafeng Guo Jing gong Daoyin Cai Tiantian Chen Xiaodong Zhang Yi You Fengming Chen Longhui Zhao ziming Liang Chao Clinical Medical College Chengdu University of Traditional Chinese MedicineChengdu 610075China Guangzhou University of Chinese Medicine Guangzhou 510405China Guangdong Provincial Institute of Chinese Medicine Guangzhou 510095China

OBJECTIVE: To investigate the mechanism underlying the action of Weipixiao(WPX) in a rat's model with ameliorating gastric precancerous lesions(GPL).METHODS: HPLC analysis was performed to identify the chemical constituents of WPX preparation.Sprague-Dawley rats were randomly assigned into control group, model group, vitacoenzyme group,high-dose WPX group(H-WPX), medium-dose WPX group(M-WPX) and low-dose WPX group(L-WPX).After modeling, the treated rats were administrated WPX or vitacoenzyme intragastrically for consecutive 10 weeks. Gene and protein expressions ofGSK3β, C-myc, Cylin E were evaluated by quantitative real-time reverse transcription-polymerase chain reaction(RT-qPCR) and immunohistochemistry, respectively.RESULTS: WPX could efficiently attenuate the pathological alterations of "non-progressive GPL" in rats.As expected, mRNA and protein levels of C-myc and Cylin E were up-regulated in model rats, while GSK3β expression down-regulated(P < 0.01). WPX treatment, especially at low dose, could significantly down-regulate the m RNA as well as protein levels of C-myc, and could lead to remarkable up-regulation of mRNA and protein levels of GSK3β in GPL rats(P < 0.05). However, no significant changes were observed in WPX-treated rats.CONCLUSION: Our findings suggested that WPX-mediated attenuation of GPL pathological alterations might be due to its regulatory effect on the expressions of GSK3β and C-myc, and on the dysregulation of Wnt/GSK3β pathway.

关键词： Gastric precancerous lesions GSK3β C-myc Cylin E Weipixiao