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跳仓法与补偿收缩混凝土组合技术在地下室工程中的应用研究

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新型建筑材料 2024年第5期51卷 123-127页

作者：王德民谭家俊崔晓康徐俊峰阮文超聂浩李治祥武汉三源特种建材有限责任公司湖北武汉430083 中国建筑一局(集团)有限公司北京100071 江苏建科工程咨询有限公司江苏南京210019

采用钙镁复合膨胀剂配制补偿收缩混凝土能够弥补跳仓法施工的混凝土存在收缩变形过大的缺陷,跳仓法与补偿收缩混凝土组合技术在工程实体结构应用中具有较好的裂缝控制效果。实体结构监测数据表明,混凝土内部早期温度修正后微应变为31μ... 详细信息

采用钙镁复合膨胀剂配制补偿收缩混凝土能够弥补跳仓法施工的混凝土存在收缩变形过大的缺陷,跳仓法与补偿收缩混凝土组合技术在工程实体结构应用中具有较好的裂缝控制效果。实体结构监测数据表明,混凝土内部早期温度修正后微应变为31με~104με,60 d龄期内缓慢降低至-153με~-48με,采用钙镁复合膨胀剂配制的补偿收缩混凝土在较长龄期内收缩量较小,开裂风险较低;不同板块收缩变形量与跳仓接壤板块数量和分块结构尺寸2个因素有关;可通过增加保温材料层数或厚度以控制早期降温速率和温降收缩量。

关键词：跳仓法补偿收缩混凝土钙镁复合膨胀剂大体积混凝土裂缝控制

Summer Warming Limited Bud Output Drives a Decline in Daughter Shoot Biomass through Reduced Photosynthetis of Parent Shoots in Leymus chinensis Seedlings

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Phyton-International Journal of Experimental Botany 2024年第7期93卷 1667-1675页

作者： Song Gao Ruocheng xu Lin Li Jiao Wang Nian Liu Johannes M.H.Knops junfeng Wang Graduate School Changchun UniversityChangchun130022China Key Laboratory of Vegetation Ecology Ministry of EducationInstitute of Grassland ScienceSchool of Life SciencesJilin Songnen Grassland Ecosystem National Observation and Research StationNortheast Normal UniversityChangchun130024China Jilin Agricultural Radio and Television School Changchun130599China Department of Health and Environmental Sciences Xi’an Jiaotong Liverpool UniversitySuzhou215000China

Understanding how summer warming inﬂuences the parent and daughter shoot production in a perennial clonal grass is vital for comprehending the response of grassland productivity to global ***,we conducted a simulated experiment using potted Leymus chinensis,to study the relationship between the photosynthetic activ-ity of parent shoots and the production of daughter shoots under a whole(90 days)summer warming scenario(+3°C).The results showed that the biomass of parents and buds decreased by 25.52%and 33.45%,respectively,under warming *** reduction in parent shoot biomass due to warming directly resulted from decreased leaf area(18.03%),chlorophyll a(18.27%),chlorophyll b(29.21%)content,as well as a reduction in net photosynthetic rate(7.32%)and the maximum quantum efﬁciency of photosystem II(PSII)photochemistry(4.29%).The decline in daughter shoot biomass was linked to a decrease in daughter shoot number(33.33%)by ***,the number of belowground buds increased by 46.43%.The results indicated that long-term summer warming reduces biomass accumulation in parent shoot by increasing both limitation of stoma and ***,the parent shoot allocates relatively more biomass to the belowground organs to maintain the survival and growth of ***,buds,as a potential aboveground population,could remedy for the cur-rent loss of parent shoot density by increasing the number of future daughter shoots if summer warming subsides.

关键词： Warming parent shoot bud bank photosynthesis chlorophyllﬂuorescence Leymus chinensis

水痘-带状疱疹病毒Oka-7S株的免疫原性分析

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中国生物制品学杂志 2024年第6期37卷 660-665页

作者：张树杰戴龙范滢周宏达房佳王梦涵徐俊峰张夫坤长春祈健生物制品有限公司吉林长春130000

目的比较水痘-带状疱疹病毒(varicella-zoster virus,VZV)Oka-7S与Oka株免疫原性。方法用高、中、低(1000、250、62.5 PFU/剂)剂量VZV Oka-7S及Oka株皮下分别免疫雌性BALB/c小鼠,每组12只,共免疫2次,每次间隔14 d。基于膜抗原荧光抗体试... 详细信息

目的比较水痘-带状疱疹病毒(varicella-zoster virus,VZV)Oka-7S与Oka株免疫原性。方法用高、中、低(1000、250、62.5 PFU/剂)剂量VZV Oka-7S及Oka株皮下分别免疫雌性BALB/c小鼠,每组12只,共免疫2次,每次间隔14 d。基于膜抗原荧光抗体试验(fluorescent antibody to membrane antigen assay,FAMA)进行VZV特异性体液免疫评价,酶联免疫斑点(ELISPOT)试验进行VZV特异性细胞免疫评价。结果VZV Oka-7S和VZV Oka株均可引起特异性体液免疫应答和细胞免疫应答,且具有相当的免疫效果;随免疫次数增加和免疫剂量升高,Oka-7S-2.2组小鼠血清中抗VZV特异性IgG抗体水平均明显升高。结论VZV Oka-7S株免疫原性与VZV Oka株相当。

关键词：水痘-带状疱疹病毒酶联免疫斑点试验膜抗原荧光抗体试验免疫原性

Fabrication of La1-xCaxFeO3 perovskite-type oxides with macro-mesoporous structure via a dual-template method for highly efficient soot combustion

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Journal of Rare Earths 2020年第4期38卷 369-375页

作者： Minjie Zhao Jixing Liu Jian Liu junfeng xu Zhen Zhao Yuechang Wei Weiyu Song State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China

A series of three-dimensionally ordered macro-mesoporous(3DOMM)La1-xCaxFeO3(x=0-0.3)perovskite-type oxides were designed and successfully fabricated for the first time via a dual-template *** which,PMMA and Brij-56 were employed as the hard template and soft template,*** is found that 3 DOMM La1-xCaxFeO3 exhibits abundant wormlike mesoporous channels about 3 nm in diameter on macroporous skeleton *** excellent catalytic activity of soot combustion benefits from not only the well-designed hierarchical porous structure of catalyst,but also the redox electron pair of Fe3+/Fe4+induced by the doping of low-valent alkaline earth metal Ca to A-site of LaFeO3.3DOMM La0.8Ca0.2FeO3 exhibits superior catalytic performance for soot combustion,which shows T50 of396℃.It is 189℃lower than that without catalyst.A combination of structure and composition in the design of catalyst can be widely extended to other catalytic systems.

关键词： Three-dimensionally ordered macro-mesoporous structure Perovskite-type oxides Lanthanum ferrite Soot combustion Rare earths

A Unicity Theorem Related to Multiple Values and Derivatives of Meromorphic Functions on Annuli

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Journal of Mathematical Research with Applications 2016年第4期36卷 467-476页

作者： junfeng xu Li CHEN Department of Mathematics Hunan University Department of Mathematics Wuyi UniversityGuangdong

In this paper, we first obtain the famous Xiong Inequality of meromorphic functions on annuli. Next we get a uniqueness theorem of meromorphic function on annuli concerning to their multiple values and derivatives by ... 详细信息

关键词： uniqueness theorem Nevanlinna value annuli meromorphic function

Can perfluorooctanoic acid be effectively degraded usingβ-PbO_(2)reactive electrochemical membrane?

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Chinese Chemical Letters 2024年第7期35卷 196-199页

作者： xubin Qian Lei xu xu Ge Zhun Liu Cheng Fang Jianbing Wang junfeng Niu College of Environmental Science and Engineering North China Electric Power UniversityBeijing 102206China College of Water Resources and Hydropower Engineering North China Electric Power UniversityBeijing 102206China Research Center for Eco-Environmental Engineering Dongguan University of TechnologyDongguan 523808China Global Centre for Environmental Remediation(GCER) University of NewcastleCallaghanNSW 2308Australia School of Chemical and Environmental Engineering China University of Mining and Technology(Beijing)Beijing 100083China

Aqueous perfluorooctanoic acid(PFOA)elimination has raised significant concerns due to its persistence and ***β-PbO_(2)plate anodes have shown efficient mineralization of PFOA,it remains unclear whether PFOA can be effectively degraded usingβ-PbO_(2)reactive electrochemical membrane(REM).Herein,we assessed the performance of Ti/SnO_(2)-Sb/La-PbO_(2)REM for PFOA removal and proposed a possible degradation *** a current density of 10 mA/cm2and a membrane flux of 8500(liters per square meter per hour,LMH),the degradation efficiency of 10 mg/L PFOA was merely8.8%,whereas the degradation efficiency of 0.1 mg/L PFOA increased to 96.6%.Although the porous structure of theβ-PbO_(2)REM provided numerous electroactive sites for PFOA,the generated oxygen bubbles in the pores could block the pore channels and adsorb PFOA *** hindered the protonation process and significantly impeded the degradation of high-concentration *** experiments indicated that·OH played dominant role in PFOA *** electrical energy per order to remove 0.1 mg/L PFOA was merely 0.74 Wh/L,which was almost an order of magnitude lower than that of other anode *** study presents fresh opportunities for the electrochemical degradation of low-concentration PFOA usingβ-PbO_(2)REM.

关键词： Perfluorooctanoic acid β-PbO_(2) Reactive electrochemical membrane Electrochemical oxidation

槐花外泌体减轻低氧诱导的胃和小肠黏膜急性氧化应激损伤研究

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胃肠病学和肝病学杂志 2024年第5期33卷 539-542页

作者：张恒王德智廖星晨张明杰王梦琪许俊锋王昕金鹏盛剑秋解放军医学院北京100853 中国人民解放军总医院第七医学中心消化内科中国人民解放军总医院第一医学中心消化内科医学部

目的分析槐花外泌体在低氧诱导的胃和小肠黏膜急性氧化应激损伤中的作用。方法通过超速离心法提取槐花外泌体并完成电镜和粒径鉴定,采用低压氧环境控制系统构建小鼠低氧急性胃肠损伤模型,在低氧第1天给予槐花外泌体灌胃,第3天安乐死小鼠... 详细信息

目的分析槐花外泌体在低氧诱导的胃和小肠黏膜急性氧化应激损伤中的作用。方法通过超速离心法提取槐花外泌体并完成电镜和粒径鉴定,采用低压氧环境控制系统构建小鼠低氧急性胃肠损伤模型,在低氧第1天给予槐花外泌体灌胃,第3天安乐死小鼠,收集消化道组织进行HE染色,收集胃和小肠黏膜进行ROS检测。期间记录小鼠的进食量、体质量、粪便性状和便血情况。结果口服槐花外泌体可改善低氧导致的小鼠血便、稀便和体质量下降,减轻低氧引起的胃和小肠黏膜损伤,降低ROS水平。结论口服槐花外泌体可有效缓解低氧引起的胃和小肠黏膜急性氧化应激损伤。

关键词：槐花外泌体低氧氧化应激胃小肠

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水痘-带状疱疹病毒抗血清的制备及检定

中国生物制品学杂志 2024年第8期37卷 983-988页

作者：刘洪涛孙跃秋王冲王梦涵张树杰李航庞惠娟徐俊峰张夫坤长春祈健生物制品有限公司研究室吉林长春130062

目的制备水痘-带状疱疹病毒(varicella-zoster virus,VZV)收获物,纯化后免疫日本大耳白兔,制备VZV抗血清,并进行各项检定。方法将VZV Oka株(vOka)在人二倍体细胞2BS株中传代培养,病毒收获后经超速离心纯化,制备免疫原,与弗式佐剂混合后... 详细信息

目的制备水痘-带状疱疹病毒(varicella-zoster virus,VZV)收获物,纯化后免疫日本大耳白兔,制备VZV抗血清,并进行各项检定。方法将VZV Oka株(vOka)在人二倍体细胞2BS株中传代培养,病毒收获后经超速离心纯化,制备免疫原,与弗式佐剂混合后经背部多点注射免疫雌性日本大耳白兔5只,制备VZV抗血清。Western blot检测血清抗体的特异性;测定膜抗原荧光抗体(fluorescent antibody to membrane antigen,FAMA)效价和血清抗体中和效价,并对两种检测方法的结果进行相关性分析。利用抗体效价较高的血清对麻疹、腮腺炎和风疹病毒进行异种病毒干扰试验。结果制备的VZV抗血清可特异性结合vOka和Oka-7S病毒收获物及gE和ORF7蛋白等多种VZV抗原;3免血清FAMA抗体效价可达1∶16384,血清抗体中和效价达1∶256;根据Karl Pearson相关系数分析得出两种检测方法结果呈线性相关。异种病毒干扰试验中试验组与对照组病毒滴度差值均<0.50 lgCCID50/mL,表明VZV抗血清对麻疹、腮腺炎和风疹病毒滴度均无干扰。结论成功制备了特异性强,亲和力高的VZV抗血清,为VZV成分疫苗的检定奠定了基础。

关键词：水痘-带状疱疹病毒中和抗体兔抗血清

An experiment on multibubble sonoluminescence spectra in sodium chloride solution

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Chinese Science Bulletin 2008年第10期53卷 1468-1472页

作者： CHEN Zhan xu junfeng HUANG Wei CHEN WeiZhong MIAO GuoQing Institute of Acoustics and Key Laboratory of Modern Acoustics of Ministry of Education Nanjing University Nanjing 210093 China

We investigated experimentally the spectra of MBSL in sodium chloride water solution with krypton as dissolved gas. We observed and compared the spectra of hydroxyl ion at 310 nm and that of sodium atom at 589 nm. It has been found that under the same experimental condition, the intensity of sodium atom spectra is obviously higher than that of the hydroxyl ion spectra, and is more sensitive to the experimental condition. The krypton content, the concentration of sodium chloride solution, and the driving sound pressure obviously affect the spectra intensity in certain range.

关键词：气穴现象声致发光光谱氯化钠溶液