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Shallow sub-lakes are essential for sustaining the successful wintering of waterbirds in Poyang Lake,China

Avian Research 2024年第2期15卷 219-228页

作者： Mengjie Lu Zhen Zhang Peng Chen Changxin Xu bin gao Luzhang Ruan School of Life Sciences Nanchang UniversityNanchang330031China Jiangxi Province Key Laboratory of watershed Ecosystem Change and Biodiversity Center for Watershed EcologyInstitute of Life Science and School of Life SciencesNanchang UniversityNanchang330031China

For migratory waterbirds,the quality of wintering habitat is related to spring migration and successful breeding in the next *** availability of food resources in the habitat is critical and varies within water *** the water-level fluctuations in Poyang Lake have been extremely variable interannually in recent years,the wintering waterbird populations have remained relatively ***,the mechanism of maintaining the stability is worth *** study aimed to compare the distribution of vegetation and herbivorous wa-terbirds in 2015-2016 and 2016-2017,focusing on three shallow sub-lakes and one main lake *** results showed that the emergence of tubers and the growth of Carex *** a continuous food supply and habitat for wintering waterbirds with a gradual decline in the water *** sub-lakes supported almost all of the tuber-eating waterbirds(1.42-1.62×10^(5))and most geese(1.34-1.53×10^(6)).However,the main lake area,covered with Persicaria hydropiper,did not provide adequate and accessible *** resulted in almost no distribution of tuber-eating waterbirds,with only a few geese congregating in early *** results demonstrated that the shallow sub-lakes under human control provided a different environment from the main lake and are key to sustaining the successful wintering of hundreds of thousands of migratory waterbirds in Poyang ***,we recommend refining the anthropogenic management of the shallow sub-lakes to regulate the water level to ensure the carrying capacity of Poyang Lake.

关键词： Anthropogenic management Carrying capacity Seasonal lake water level Wintering habitat

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Efficient and selective recovery of gd(Ⅲ)via polyethyleneimine modification of lanthanum-based metal-organic frameworks

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Journal of Rare Earths 2024年第1期42卷 210-219,I0007页

作者： Wenhao Li Lijinhong Huang bin Xiao Xiaoguang Duan Haike Li Lang Li wanfu Huang ganzhou Key Laboratory of Basin Pollution Simulation and Control Jiangxi University of Science and TechnologyGanzhou341000China Innovation Center for water Quality Security Technology at ganjiang River Basin Jiangxi University of Science and TechnologyGanzhou341000China Faculty of Science and Engineering WA School of Mines:MineralsEnergy and Chemical EngineeringCurtin UniversityWAAustralia School of Architecture and Design Jiangxi University of Science and TechnologyGanzhou341000China School of Resources and Architectural Engineering Gannan University of Science and TechnologyGanzhou341000China School of Chemical Engineering and Advanced Materials The University of AdelaideAdelaideSA5005Australia School of Resource and Environmental Engineering Jiangxi University of Science and TechnologyGanzhou341000China

With the development of the economy and the increasing demand for environmental protection,the efficient and selective recovery of gd(Ⅲ)from actual wastewater is of critical *** this work,lanthanum-based metal-organic framework(LaBDC)materials were prepared by a hydrothermal method,and then polyethyleneimine(PEI)and LaBDC were combined by an impregnation method to form a novel LaBDC@xPEI *** prepared materials were characterized using Fourier transfo rm infrared spectroscopy(FTIR),X-ray diffraction(XRD),scanning electron microscopy(SEM),energy dispersive X-ray spectroscopy(EDX),B runauer-Emmett-Teller(BET),thermogravimetric analysis(TgA)and X-ray photoelectron spectroscopy(XPS).Experiments show that LaBDC@50%PEI has the highest adsorption capacity(181.77 mg/g)among lanthanum-based MOFs with different PEI loadings at pH=5.5,which is about 5.1 times that of bare *** adsorption isotherm analysis shows that LaBDC@50%PEI follows the Langmuir *** addition,the adsorption kinetics of LaBDC@50%PEI follows a pseudo-second-order kinetic model,indicating that the adsorption process is chemical *** is worth noting that LaBDC@50%PEI maintains good adsorption performance and stability after three recycling tests,and exhibits excellent selectivity in cation interference ***,the LaBDC@50%PEI composites possess good stability and hold great promises in rapid recovery of gd(Ⅲ)from practical aqueous environments.

关键词： Wet-impregnation method Polyethylene imine Metaleorganic frameworks Lanthanum Recovery of gd(Ⅲ) Rare earths

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Effect of Al and Zn additives on grain size of Mg-3Ni-2MnO_(2) alloy

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Transactions of Nonferrous Metals Society of China 2009年第S2期19卷 355-358页

作者： FANg wa SUN Hong-fei FANg Wen-bin wa.g bin School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China

The effect of Al and Zn additives on the grain size of Mg-3Ni-2MnO_(2) alloy was *** nanostructured Mg-3Ni-2MnO_(2) and Mg-3Ni-2MnO_(2)-3Al-Zn were made by ball milling process under hydrogen *** XRD results and TEM analysis reveal that Al and Zn additives almost have no effect on the grain size of Mg-3Ni-2MnO_(2) *** present study provides us a feasibility of producing nano-structured magnesium alloys,based on hydrogenation,disproportionation,desorption and recombination(HDDR),by adding beneficial elements to hydrogen storage materials.

关键词： nanocrystalline magnesium alloy hydrogenation-disproportionation-desorption-recombination(HDDR) ball milling

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Structural variations of a new fertility restorer gene,Rf20,underlie the restoration of wild abortive-type cytoplasmic male sterility in rice

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Molecular Plant 2024年第8期17卷 1272-1288页

作者： Shufeng Song Yixing Li Mudan Qiu Na Xu bin Li Longhui Zhang Lei Li Weijun Chen Jinglei Li Tiankang wa.g Yingxin Qiu Mengmeng gong Dong Yu Hao Dong Siqi Xia Yi Pan Dingyang Yuan Li Li State Key Laboratory of Hybrid Rice Hunan Hybrid Rice Research CenterHunan Academy of Agricultural SciencesChangsha 410125China College of Agronomy Hunan Agricultural UniversityChangsha 410128China College of Plant Protection Hunan Agricultural UniversityChangsha 410128China College of Tropical Crops Hainan UniversityHaikou 570228China Longping Branch College of BiologyHunan UniversityChangsha 410125China

The discovery of a wild abortive-type(wa)cytoplasmic male sterile(CMS)line and breeding its restorer line have led to the commercialization of three-line hybrid rice,contributing considerably to global food ***,the molecular mechanisms underlyingfertility abortion and the restoration of CMs-wa lines remain largely *** this study,we cloned a restorer gene,Rf2o,following a genome-wide association study analysis of the core parent lines of three-line hybrid *** found that Rf20 was present in all core parental lines,but different haplotypes and structural variants of its gene resulted in differences in Rf2o expression levels between sterileand restored ***20 could restorepollen fertility in the CMS-wa line and was found to be responsible for fertility restoration in some CMs lines under high *** addition,we found that Rf20 encodes a pentatricopeptide repeat protein that competes with wa352 for binding with *** interaction enhances Cox11's function as a scavenger of reactive oxygen species,which in turn restores ***,ourstudysuggestsanewactionmodeforpentatricopeptide repeatproteins inthe fertilityrestorationofCMs lines,providing an essential theoretical basisforbreedingrobustrestorer lines and for overcoming high temperature-induced fertility recovery of some CMS lines.

关键词： COX11 cytoplasmic male sterility rf20 wa352 wild abortion

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Fabrication and microstructure of nanostructured Mg-3Ni-2MnO_(2) by ball milling in hydrogen atmosphere

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Transactions of Nonferrous Metals Society of China 2009年第S2期19卷 359-362页

作者： FANg Wen-bin FANg wa SUN Hong-fei YU Zhen-xing School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China

Nanostructured Mg-3Ni-2MnO_(2) was synthesized by ball milling elemental powders of Mg,Ni and MnO_(2) in hydrogen *** microstructures of the powder prepared at different milling time were analyzed by X-ray diffractometry(XRD), scanning electron microscopy(SEM)and high resolution electron microscopy(HREM).The milling time is the most key parameter impacting on the grain size and the microstructure of *** prolonging the milling time,particle size becomes smaller and *** after the ball milling time reaches about 20 h,reduction of grain size becomes *** the milling time is more than 50 h,nanocrystalline fully *** the milling time is more than 80 h,there are more amorphous phases in *** average particle diameter of material is about 1μm and the grain size is 10-30 nm.

关键词： nanocrystalline ball milling grain size amorphous phase

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植物乳植杆菌H8对小鼠氧化损伤的作用机制

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食品科学技术学报 2024年第5期42卷 93-103页

作者：李月闫薇姜斌林柯任大勇吉林农业大学食品科学与工程学院吉林长春130118

黏面子是以玉米面为原料发酵制成的东北地区特有的发酵食品。为探讨从黏面子中分离出的植物乳植杆菌H8是否对小鼠氧化损伤具有改善作用,建立了D-半乳糖致氧化损伤的衰老小鼠模型,并对其可能的信号机制进行研究。取32只昆明小鼠,每天注射... 详细信息

黏面子是以玉米面为原料发酵制成的东北地区特有的发酵食品。为探讨从黏面子中分离出的植物乳植杆菌H8是否对小鼠氧化损伤具有改善作用,建立了D-半乳糖致氧化损伤的衰老小鼠模型,并对其可能的信号机制进行研究。取32只昆明小鼠,每天注射200 mg/kg的D-半乳糖致小鼠氧化损伤,同时灌胃浓度为1.0×1010 CFU/mL的植物乳植杆菌H8,持续8周,观察H8对氧化损伤小鼠血清和肝脏的作用情况。结果表明:H8可通过提高器官指数保护小鼠组织免受氧化应激损伤,并显著降低了血清和肝脏中氧化应激水平,包括一氧化氮和丙二醛,同时提高了血清和肝脏中抗氧化指标,包括超氧化物歧化酶、谷胱甘肽过氧化物酶和还原型谷胱甘肽的活性;此外,H&E切片染色发现,植物乳植杆菌H8可以减少D-半乳糖诱导的小鼠肝、脾、脑和结肠组织的损伤;同时,植物乳植杆菌H8可以激活sirtuin1(SIRT1)和sirtuin3(SIRT3),并激发Nrf 2-ARE途径诱导抗氧化酶的mRNA和蛋白的表达水平;并且,SIRT1可以促进p53的泛素化和降解,并减少活性氧的生成。研究结果表明,植物乳植杆菌H8的抗氧化作用可能与SIRT1/SIRT3/Nrf2信号通路的上调有关,研究了SIRT3通路和乳植杆菌属之间的潜在关联。本研究旨在为开发抗氧化性益生菌产品提供理论参考。

关键词：植物乳植杆菌衰老氧化损伤 D-半乳糖 SIRT1/SIRT3/Nrf2信号通路

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基于CiteSpace的纳布啡研究热点及可视化分析

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麻醉安全与质控 2024年第1期6卷 21-27页

作者：吴安琪朱斌祁彦伟李杨屈娃杨毅苏州高新区人民医院麻醉科江苏苏州215129 大庆油田总医院麻醉科黑龙江大庆163316

目的应用知识图谱分析的方法全面了解新型麻醉药纳布啡的研究前沿,为该药物的相关科学研究与临床应用提供参考。方法使用CiteSpaceV软件,以“纳布啡”为主题词,对CNKI核心数据库中2016~2021年关于纳布啡相关文献进行可视化分析。结果合... 详细信息

目的应用知识图谱分析的方法全面了解新型麻醉药纳布啡的研究前沿,为该药物的相关科学研究与临床应用提供参考。方法使用CiteSpaceV软件,以“纳布啡”为主题词,对CNKI核心数据库中2016~2021年关于纳布啡相关文献进行可视化分析。结果合计检索相关中文文献578篇,纳人研究545篇;纳布啡2016~2021年发文量总体呈上升趋势;高频关键词为“纳布啡”“舒芬太尼”“丙泊酚”及“PCIA”等;突现词为“PCIA”“安全”和“麻醉效果”等。结论纳布啡自2016年应用于临床以来关注热点由麻醉的安全、效果及舒适性研究,逐步扩展到各亚专科麻醉的临床应用,并呈现精准化趋势,当前研究热点主要集中在纳布啡复合其他麻醉药物的研究、PCIA以及日间手术等方面。本文对纳布啡的研究进展与可视化分析的结果能够为该药物的临床应用与研究方向提供一定的参考。

关键词： Citespace纳布啡知识图谱可视化分析

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一起东佛里生奶绵羊附红细胞体病流行病学调查、诊疗报告

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畜牧兽医杂志 2024年第3期43卷 62-65页

作者：钱琳娜张帆宋越邵国玉乔蕾杨斌高娃内蒙古自治区农牧业科学院内蒙古呼和浩特010031 科尔沁右翼前旗动物疫病预防控制中心

为探究附红细胞体在内蒙古呼和浩特市托克托县地区的流行情况,接诊呼和浩特托县地区某东佛里生奶绵羊养殖场病例,该场近一周多圈舍出现产奶羊只体温升高、精神沉郁、瘫软、食欲减退或废绝等症状,有出现症状1~2 d迅速死亡病例,也有使用... 详细信息

为探究附红细胞体在内蒙古呼和浩特市托克托县地区的流行情况,接诊呼和浩特托县地区某东佛里生奶绵羊养殖场病例,该场近一周多圈舍出现产奶羊只体温升高、精神沉郁、瘫软、食欲减退或废绝等症状,有出现症状1~2 d迅速死亡病例,也有使用抗生素硫酸庆大霉素-青霉素联用结合补液治疗1周无好转或死亡病例,死亡总数超8只,仍有10余只相似症状正在接受治疗。经现场剖检、圈舍环境调查、样品实验室检测,结合临床诊疗,确诊此次疫情为奶绵羊附红细胞体病,且周边羊养殖场(户)羊只也存在附红细胞体感染。说明附红细胞体在托克托县呈地方性流行。

关键词：奶绵羊附红细胞体流行病学调查诊断治疗

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Evaluation of Beauveria bassiana （Hyphomycetes） isolates as potential agents for control of Dendroctonus valens

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Insect Science 2011年第2期18卷 209-216页

作者： Long-wa Zhang Yu-Jun Liu Jian Yao bin wa.g Bo Huang Zeng-Zhi Li Mei-Zhen Fan Jiang-Hua Sun Anhui Provincial Key Laboratory of Microbial Pest Control Anhui Agricultural University Heifei Anhui Entry-Exit Inspection and Quaran- tine Bureau Hefei State Key Laboratory of Integrated Management Agricultural Pest & Rodents Institute of Zoology Chinese Academy of Sciences Beijing China

The red turpentine beetle （RTB）, Dendroctonus valens LeConte, as a destructive invasive pest, has become one of the most economically important forest pest in China. Effective control measures are desperately needed. Entomopathogenic fungi, such as Beauveria bassiana, have shown great potential for the management of some bark beetle species. In this study, 12 isolates of B. bassiana from bark beetle were examined for biological characteristics and virulence, to assess their potential as biocontrol agents for RTB. There were significant differences （at P = 0.05） in colony growth rate, conidial yield, conidial germination, tolerance to UV light and extracellular proteases activity among the tested B. bassiana isolates. Isolates, including Bbl801, Bb1906, Bb789 and Bb773, exhibited the best characteristics, because they have faster hyphal growth rate, higher spore production and faster spore germination, higher UV tolerance and protease （Prl） production. The results of a pathogenicity test ofB. bassiana on RTB larvae showed that most isolates of B. bassiana have demonstrated high efficacy and the highest virulent isolate was Bb 1801, which killed 100% of the treated insects and had a median lethal time （LT50） of 4.60 days at a concentration of 1 ×107 conidia/mL. Therefore, isolate Bb1801 has a great potential for sustainable control of RTB in the forest. The correlation between biological characteristics and virulence of the fungal isolates is discussed and the possibility of combination of entomopathogenic fungi with semiochemicals, as one of the promising strategy for RTB control, is considered.

关键词： Beauveria bassiana biological characteristics microbial control Dendroctonus valens virulence

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异质a-C:H/a-C:H:F配副的摩擦学行为研究

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表面技术 2024年第7期53卷 107-115页

作者：唐诗琪邢朝阳王圆圆张俊彦张斌许昌学院河南许昌461002 中国科学院兰州化学物理研究所先进润滑与防护材料研究发展中心兰州730000

目的研究F元素掺杂非晶碳基薄膜与a-C:H薄膜摩擦配副的摩擦学行为机制。方法利用PECVD法在Si基底上制备a-C:H:F薄膜,与直径为6.0mm的a-C:H薄膜摩擦对偶球组成摩擦配副体系,使用往复模式的CSMTRB3摩擦机研究a-C:H:F薄膜的摩擦学特性,频率... 详细信息

目的研究F元素掺杂非晶碳基薄膜与a-C:H薄膜摩擦配副的摩擦学行为机制。方法利用PECVD法在Si基底上制备a-C:H:F薄膜,与直径为6.0mm的a-C:H薄膜摩擦对偶球组成摩擦配副体系,使用往复模式的CSMTRB3摩擦机研究a-C:H:F薄膜的摩擦学特性,频率为5Hz,滑动总次数为9000,外加载荷分别为2、4、6、8、10 N。通过纳米硬度、X射线光电子能谱、傅里叶红外光谱、激光共聚焦拉曼光谱、场发射扫描电镜及CSM摩擦试验机等,分别评价a-C:H:F薄膜的结构、表面形貌、力学性能、摩擦学性能等。结果在干摩擦环境下,随着载荷的增加,a-C:H:F薄膜的摩擦因数逐渐降低,平稳后摩擦因数低至0.018。通过掺杂F元素,一方面促进了薄膜的sp^(2)-C杂化,另一方面增大了薄膜的无序度。F元素具有钝化薄膜表面和静电排斥的作用,使得a-C:H:F薄膜具有较低的摩擦因数和磨损率。结论采用PECVD方法制备的a-C:H:F薄膜具有更好的减摩降损能力。

关键词：摩擦学性能 F元素掺杂改性类金刚石薄膜等离子体增强化学气相沉积

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