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Transpiration rates of urban trees, Aesculus chinensis

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Journal of Environmental Sciences 2012年第7期24卷 1278-1287页

作者： Hua Wang xiaoke Wang Ping zhao Hua Zheng Yufen Ren Fuyuan Gao Zhiyun Ouyang State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Institute of Forestry and Pomology Beijing Academy of Agriculture and Forestry SciencesBeijing 100093China South China Institute of Botany Chinese Academy of SciencesGuangzhou 510650China Beijing Teaching Botanical Garden Beijing 100061China

Transpiration patterns of Aesculus chinensis in relation to explanatory variables in the microclimatic, air quality, and biological phenomena categories were measured in Beijing, China using the thermal dissipation method. The highest transpiration rate measured as the sap flux density of the trees took place from 10：00 am to 13：00 pm in the summer and the lowest was found during nighttime in the winter. To sort out co-linearity, principal component analysis and variation and hierarchical partitioning methods were employed in data analyses. The evaporative demand index （EDI） consisting of air temperature, soil temperature, total radiation, vapor pressure deficit, and atmospheric ozone （O3）, explained 68% and 80% of the hourly and daily variations of the tree transpiration, respectively. The independent and joint effects of EDI variables together with a three-variable joint effect exerted the greatest influences on the variance of transpiration rates. The independent effects of leaf area index and atmospheric 03 and their combined effect exhibited minor yet significant influences on tree transpiration rates.

关键词： horse chestnut sap flux density microclimate air pollutants leaf area index

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谷子Dirigent家族基因鉴定与分析

核农学报 2024年第9期38卷 1647-1659,I0001页

作者：赵玉雪任学军李云王慧敏周小可林小虎韩玉翠河北科技师范学院农学与生物科技学院/河北省作物逆境生物学重点实验室河北秦皇岛066004 河北科技师范学院分析测试中心河北秦皇岛066004 河北科技师范学院乡村振兴研究中心河北秦皇岛066004

Dirigent(DIR)在植物木脂素或木质素的产生、防御反应、次生代谢和抗病性中起重要作用。为探究谷子DIR家族基因(SiDIRs)的生物学功能,本研究对其进行生物信息学和盐碱胁迫下的基因表达分析。结果表明,共鉴定到41个SiDIRs,不均匀分布在8... 详细信息

Dirigent(DIR)在植物木脂素或木质素的产生、防御反应、次生代谢和抗病性中起重要作用。为探究谷子DIR家族基因(SiDIRs)的生物学功能,本研究对其进行生物信息学和盐碱胁迫下的基因表达分析。结果表明,共鉴定到41个SiDIRs,不均匀分布在8条染色体上,根据其在染色体上的位置将其命名为SiDIR1~SiDIR41,根据系统进化树关系将其划分为5个亚家族。共线性分析结果表明,SiDIRs同单子叶植物高粱、玉米和水稻的共线性关系远高于双子叶植物拟南芥、番茄和大豆。顺势作用元件分析结果表明,大多数SiDIRs具有与激素、植物生长、环境胁迫和光相关的元件。利用String软件预测到7个SiDIRs蛋白质的相互作用网络。SiDIRs在根、茎、叶和花中具有组织表达特异性,表明它们在植物生长发育中发挥不同的作用。分析盐碱胁迫下12个SiDIRs基因的表达水平发现,B175(盐碱敏感)和JK3(耐盐碱)较对照均有不同程度的变化,SiDIR17和SiDIR28在JK3中呈上调表达,但在B175中呈下调表达,推测这两个基因可能参与谷子耐盐碱胁迫。本研究结果可为深入解析SiDIRs的耐盐碱分子机制提供理论基础,为今后培育高效耐盐碱谷子新品种提供基因资源。

关键词： Dirigent基因家族盐碱胁迫响应谷子

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模拟海水胁迫对小麦萌发的影响

作物杂志 2024年第4期 96-102页

作者：李菡赵玉雪周小可李云郭振清王健韩玉翠林小虎河北科技师范学院农学与生物科技学院/河北省作物逆境生物学重点实验室河北秦皇岛066004 河北科技师范学院乡村振兴研究中心河北秦皇岛066004

为了明确盐碱(模拟海水)胁迫对不同小麦品种萌发相关性状的影响,以4个小麦品种为材料,设0.0(CK)、0.2、0.4、0.6、0.8、1.0倍标准盐度模拟海水溶液进行胁迫,分析4个小麦品种萌发期耐盐碱性差异,并确定小麦萌发期模拟海水胁迫的最适筛选... 详细信息

为了明确盐碱(模拟海水)胁迫对不同小麦品种萌发相关性状的影响,以4个小麦品种为材料,设0.0(CK)、0.2、0.4、0.6、0.8、1.0倍标准盐度模拟海水溶液进行胁迫,分析4个小麦品种萌发期耐盐碱性差异,并确定小麦萌发期模拟海水胁迫的最适筛选浓度。结果表明,盐碱胁迫对津农7号和中麦998相对发芽势和相对发芽率的抑制小于泰农18和济麦229,4个品种均随盐碱浓度的增加受到的抑制越严重。与CK相比,4个小麦品种的相对芽长、相对最大根长和相对芽鲜重在胁迫下均显著降低,且随浓度的增加受到抑制越严重,其中中麦998受到抑制最小,济麦229受抑制最大,当浓度增加到0.8倍时4个品种均不能发芽。盐碱胁迫对4个品种相对根鲜重的影响存在较大差异,影响最小的为津农7号。与CK相比,津农7号和济麦229的相对根冠比在盐碱胁迫下显著增加,且在0.4倍浓度时津农7号(250.63)高于其他品种。综合分析表明,津农7号和中麦998为耐盐碱型品种,泰农18为中间型品种,济麦229为盐碱敏感型品种,0.4倍浓度为小麦萌发期耐盐碱性筛选的适宜浓度。小麦萌发期7个盐碱相关性状间除相对根冠比与相对发芽势、相对芽长、相对最大根长、相对芽鲜重间相关性不显著外,其余均存在显著或极显著相关性。

关键词：小麦萌发期盐碱胁迫模拟海水

3D Printing of Well Dispersed Electrospun PLGA Fiber Toughened Calcium Phosphate Scaffolds for Osteoanagenesis

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Journal of Bionic Engineering 2020年第4期17卷 652-668页

作者： Guoru zhao Rongwei Cui You Chen Sijie Zhou Chen Wang Zhangmei Hu xiaoke Zheng Maohong Li Shuxin Qu Key Lab of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Analytical and Testing Center Southwest Jiaotong UniversityChengdu 610031China Key Lab of High-speed Railway Engineering Ministry of EducationSchool of Civil EngineeringSouthwest Jiaotong UniversityChengdu 610031China

Although the toughening of Calcium phosphate(CaP)scaffold by the addition of fiber has been well recognized,integrated mechanical,structural and functional considerations have been neglected in the design and fabrication of CaP scaffold *** emerging 3D printing provides a promising technique to construct CaP scaffold with precise size and elaborate ***,the most challenge is to extrude smoothly the CaP paste containing fibers for frequently-used extrusion-based 3D *** this study,frozen section and chemical dispersant(Pluronic F127,F127)were employed jointly to prepare non-aggregated polylactic-co-glycolic acid(PLGA)*** injectability of CaP pastes with well dispersed PLGA fibers was more than 90%when the content of PLGA fibers was no more than 3 wt%.Meanwhile rheological property of CAP pastes with well dispersed fibers showed shear thinning,which were both beneficial to extrude CaP paste with well dispersed fibers for 3D ***,these CaP scaffolds showed ductile fracture behavior due to the pullout and bridging effect of PLGA *** cell proliferation and alkaline phosphatase(ALP)activity indicated that 3D printed CAP scaffold containing PLGA fibers possesses excellent biocompatibility and facilitate osteogenic differentiation ***,it was feasible to print CaP pastes with well dispersed PLGA fibers to construct toughening CaP scaffolds with the higher shape fidelity and complex structures,which had significant clinical potentials in osteoanagenesis due to their higher toughness and excellent biocompatibility.

关键词： CaP scaffold extrusion-based 3D printing PLGA fiber toughening biocompatibility

Recent advances in the improvement of g-C_(3)N_(4) based photocatalytic materials

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Chinese Chemical Letters 2021年第1期32卷 13-20页

作者： Yupeng Xing xiaoke Wang Shuhua Hao Xueli Zhang Xiao Wang Wenxuan Ma Gang zhao Xijin Xu School of Physics and Technology University of JinanJi’nan 250022China

g-C_(3)N_(4) have been widely used in the fields of photocatalytic hydrogen production,photocatalytic degradation of dyes and oxidative degradation of toxic gases due to their excellent *** has attracted extensive attention in recent years due to its highly efficient photocatalytic capacity of hydrogen generation,water oxidation,carbon dioxide reduction and degradation of organic *** of the abundant carbon and nitrogen composition of the earth,large-scale production and industrial applications of this material are *** modification of this material makes its performance more excellent so that this new material can obtain a steady stream of *** outstanding works have become important materials and milestones on the road to mankind's photocatalytic hydrogen *** review will begin with the basic idea of designing,synthesizing and improving g-C_(3)N_(4) based photocatalytic materials,and introduce the latest development of g-C_(3)N_(4) photocatalysts in hydrogen production from four aspects of controlling the carbon/nitrogen ratio,morphology,element doping and heterojunction structure of g-C_(3)N_(4) materials.

关键词： Carbon nitride Modification Enhancement Photocatalyst Hydrogen evolution reaction

间断缝合窦部成形技术和"根部优先"策略治疗急性Stanford A型主动脉夹层的疗效分析

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中华胸心血管外科杂志 2024年第5期40卷 288-291页

作者：赵永亮范康钧郭晓珂姚碧刘斌马林峰刘宏生程前进济宁医学院附属医院心脏外科济宁272029 济宁市心血管疾病诊疗重点实验室济宁272029 济宁医学院附属医院心脏重症监护室济宁272029

回顾性分析2019年10月至2022年11月济宁医学院附属医院收治的111例急性Stanford A型主动脉夹层行手术治疗患者的资料,探讨间断缝合固定主动脉窦部和"根部优先"策略在急性Stanford A型主动脉夹层手术中的临床疗效。术前主动脉瓣中度及以... 详细信息

回顾性分析2019年10月至2022年11月济宁医学院附属医院收治的111例急性Stanford A型主动脉夹层行手术治疗患者的资料,探讨间断缝合固定主动脉窦部和"根部优先"策略在急性Stanford A型主动脉夹层手术中的临床疗效。术前主动脉瓣中度及以上反流15例,全组院内死亡6例。中位随访6个月,无再次手术干预;2例主动脉瓣重度反流降为微量,4例中度未见明显变化,其余为轻度及以下;无主动脉窦部残余夹层,未形成动脉瘤,术后主动脉窦部内径较术前减小。间断缝合固定主动脉窦部成形和"根部优先"策略在保留原有窦部形态的同时,避免了进一步扩张,并有利于降低吻合难度、缩短心肌缺血时间。该方法在围术期结局方面表现满意,有一定推广价值。

关键词： A型主动脉夹层间断缝合主动脉瓣院内死亡主动脉窦部临床疗效心肌缺血重度反流

Cloning of a novel human zinc finger protein(ZNF199)cDNA

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Chinese Science Bulletin 1999年第3期44卷 287-290页

作者： Peirong Hu Long Yu Min Zhang xiaoke Wang Qiang Tu Shouyuan zhao Fudan Univ State Key lab Genet Engn Shanghai 200433 Peoples R China

ZINC finger proteins play an important role in the regulation of gene expression by binding to DNA/RNA in a sequence-specific manner. Now nearly 200 human zinc finger genes have been cloned. According to the difference of the conservative domain, the zinc finger proteins can be classified into several *** of zinc finger proteins belong to the C2H2 type containing the consensus amino acid sequence YECX2CX3FX5LX2HX3HTGEKP, which is rather conservative especially in the link region between two zinc finger motifs （TGEKP）

关键词： ZNF199)cDNA more Cloning of a novel human zinc finger protein gene

爆炸复合板基板SA516Gr70模拟焊后热处理态低温冲击性能研究

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宽厚板 2024年第3期30卷 7-10页

作者：李常牛张晓克赵森灏管秀兵河钢集团舞钢公司

针对爆炸复合板基板SA516Gr70低温冲击性能不合格现象,分析、研究生产工艺和金相组织对低温冲击性能的影响,结果表明:钢中有害元素P含量偏高,粗轧阶段压下量偏小,导致晶粒尺寸和组织均匀性较差,是冲击性能不合格问题产生的主要原因。为... 详细信息

针对爆炸复合板基板SA516Gr70低温冲击性能不合格现象,分析、研究生产工艺和金相组织对低温冲击性能的影响,结果表明:钢中有害元素P含量偏高,粗轧阶段压下量偏小,导致晶粒尺寸和组织均匀性较差,是冲击性能不合格问题产生的主要原因。为此,对钢的化学成分、轧制工艺设计进行优化和改进,提高了钢板的低温韧性和冲击性能合格率。

关键词： SA516Gr70 模拟焊后热处理低温冲击韧性有害元素压下量

Hollow polyhedron structure of amorphous Ni-Co-S/Co(OH)_(2) for high performance supercapacitors

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Chinese Chemical Letters 2021年第8期32卷 2453-2458页

作者： Xixi Zhang Guangmeng Qu Zonghua Wang Guotao Xiang Shuhua Hao xiaoke Wang Xijin Xu Wenxuan Ma Gang zhao School of Physics and Technology University of JinanJi’nan 250022China

In power storage technology,ion exchange is widely used to modify the electronic structures of electrode materials to stimulate their electrochemical ***,we proposed a multistep ion exchange(cation exchange and anion exchange) strategy to synthesize amorphous Ni-Co-S and β-Co(OH)_(2) hybrid nanomaterials with a hollow polyhedron *** synergistic effects of different components and the remarkable superiorities of hollow structure endow Ni-Co-S/Co(OH)_(2) electrode with outstanding electrochemical performance,including ultra-high specific capacity(1440.0 C/g at 1 A/g),superior capacitance retention rate(79.1% retention at 20 A/g) and long operating lifespan(81.4% retention after5000 cycles).Moreover,the corresponding hybrid supercapacitor enjoys a high energy density of 58.4 Wh/kg at the power density of 0.8 kW/kg,and a decent cyclability that the capacitances are maintained at80.8% compared with the initial *** research presents a high-performance electrode material and provides a promising route for the construction of electrode materials for supercapacitors with both structural and component advantages.

关键词： Ion exchange Amorphous β-Co(OH)2 Hollow polyhedron Supercapacitor