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Lignocellulosic fraction-induced niche differentiation within dissimilatory iron reducing bacterial groups in a paddy soil

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Soil Ecology Letters 2024年第1期6卷 77-88页

作者： yunbin jiang Wenting Hu Kailou Liu Shangshu Huang Fengwu Zhou Cheng Han Huan Deng Wenhui Zhong jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control School of GeographyNanjing Normal UniversityNanjing 210023China jiangsu Centerfor Collaborative Innovation in Geographical Information Resource Development and Application Nanjing 210023China National Engineering and Technology Research Center for Red Soil Improvement Jiangxi Institute of Red Soil and Germplasm ResourcesNanchang 331717China Schoolof Environment Nanjing Normal UniversityNanjing 210023China

Responses of soil DIRB to lignocellulosic fractions during a 6-week microcosm incubation were investigated.Anaeromyxobacter,Bacillus,and Clostridium maintained their domi-nance throughout the incubation.Distinct DIRB groups proliferated under specific lignocellulosic fraction amendments.Limits of insufficient ferric iron on the proliferation varied by DIRB group.Dissimilatory iron reducing bacteria(DIRB)are phylogenetically and physi-ologically diverse in paddy soils,where iron reduction closely couples with the oxidation of rice straw-derived carbon in the straw returning scenarios.However,few studies have addressed the niche differentiation within DIRB groups during the degradation of lignocellulosic fractions of rice straw.This study conducted a 6-week microcosm incubation experiment to reveal the distinct responses of DIRB groups under specific lignocellulosic fraction amendments with and without ferrihydrite(Fh)addition in a flooded paddy Ultisol.Results showed that the total absolute abundance of the 19 detected DIRB groups did not vary significantly during the incubation.Anaeromyxobacter,Bacillus,and Clostridium were the dominant DIRB groups for all lignocellulosic treatments whereas Thermincola was dominant but only under xylan amendment with Fh addition.DIRB-nodes in the co-occurrence networks of bacterial community mainly belonged to Anaeromyxobacter and Bacillus.Clostridium and Thermincola,Alkaliphilus and Anaeromyxobacter,and Alicyclobacillus,Desulfobulbus,and Desulfosporosinus were specifically proliferated under xylan,cellulose,and lignin amendments,respectively.Whether the proliferation was limited by insufficient ferric iron varied by bacterial group.These findings suggested the lignocellulosic fraction-induced niche differentiation within DIRB groups,which advanced our understanding of the ecology of DIRB in paddy soils under straw returning.

关键词： cellulose hemicellulose lignin bacterial community diversity co-occurrence networks

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Sticked-Layer Strategy to a Flexible-Robust Hydrogen-Bonded Organic Framework for Efficient C_(2)H_(2)/CO_(2)Separation

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CCS Chemistry 2024年第3期6卷 663-671页

作者： Zhen Yuan Xianghua jiang Liangji Chen Junjie Chen Lu Li Yisi Yang yunbin Li Fahui Xiang Shengchang Xiang Banglin Chen Zhangjing Zhang Fujian Key Laboratory of Polymer Materials College of Chemistry and Materials ScienceFujian Normal UniversityFuzhou 350007

Flexible-robust hydrogen-bonded organic frameworks(HOFs)are attracting increasing interest due to their excellent separation performance for important industrial gases,but the construction remains challenging.Herein,a sticked-layer strategy is first proposed to construct a flexible-robust HOF,HOFFJU-8,from a donor(D)–π–acceptor(A)molecule 4,4′,4″,4‴-(pyrrolo[3,2-b]pyrrole-1,2,4,5-tetrayl)tetrabenzonitrile(DP-4CN).HOF-FJU-8 is amicroporous three-dimensional framework composed of two kinds of DP-4CN molecules,one acting as building units for the two-dimensional layer via C≡N···H–C hydrogen bond dimers and another as the sticks to link the layers along channels through D–Aπ···πinteractions.The activated framework HOF-FJU-8a possesses flexible-robust pore characteristics,as determined by the gas adsorption and in situ gas-loaded powder X-ray diffraction.HOF-FJU-8a exhibits adaptive adsorption and stronger binding affinity to C_(2)H_(2)rather than CO_(2)due to the flexible-robust nature,which can effectively separate acetylene and carbon dioxide mixtures.

关键词： hydrogen-bonded organic framework flexible-robust sticked-layer D-Aπ···πinteraction in situ powder X-ray diffraction C_(2)H_(2)/CO_(2)separation

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Indication of Soil Microbial Activity by Electrical Signals of Microbial Fuel Cells with Re-Vegetated Red Soils

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Pedosphere 2018年第2期28卷 269-276页

作者： jiang yunbin DENG Huan QIN Hongyi HAN Cheng ZHONG Wenhui jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control School of Geography Science Nanjing Normal University Nanjing 210023 (China) jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Nanjing 210023(China)

Electrical signals generated by microbial fuel cells(MFCs)may potentially indicate overall soil microbial activity.This study aimed to validate whether a significant correlation existed between soil microbial activity and electrical signals in different soils.Re-vegetated red soils with four vegetation types and unplanted eroded red soil were collected and packed into MFCs.The voltage of the MFCs was recorded during operation.Electrical signals including start-up time(ST),peak voltage,and coulomb quantity were extracted from the voltage curves.Soil dehydrogenase activity(DHA) was determined as a reference method to verify the reliability of the electrical signals.After MFC operation,the anodic bacterial community was analyzed by Illumina sequencing based on the 16S rRNA gene.The results indicated that ST was significantly correlated with DHA,along with soil organic carbon content.The linear regression model described the optimal relationships for ST and DHA.Clostridium and Acinetobacter constituted the dominant genera on the anode of the MFCs.The results demonstrated that ST may indicate soil microbial activity in re-vegetated red soils.

关键词： anodic bacterial community coulomb quantity dehydrogenase activity Illumina sequencing start-up time

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基于谱效关系的独一味抗小鼠耳肿胀作用的药效物质基础研究

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中药药理与临床 2024年第4期40卷 95-100页

作者：康点点张蓉蓉詹琥珀孙杰玉蒋桂华蒋运斌成都中医药大学药学院/西南特色中药资源国家重点实验室成都611137 西南大学药学院·中医药学院重庆400715 成都中医药大学民族医药学院成都611137

目的:基于谱效关系研究并经实验验证,阐明独一味抗炎药效物质基础。方法:对12批不同来源的独一味进行HPLC分析,建立指纹图谱。基于小鼠耳肿胀模型,测定各批次独一味水提物的耳肿胀率及其抑制率、血清中TNF-α、IL-6的含量。运用灰色关... 详细信息

目的:基于谱效关系研究并经实验验证,阐明独一味抗炎药效物质基础。方法:对12批不同来源的独一味进行HPLC分析,建立指纹图谱。基于小鼠耳肿胀模型,测定各批次独一味水提物的耳肿胀率及其抑制率、血清中TNF-α、IL-6的含量。运用灰色关联度法及文献对比,分析独一味水提物中与抗炎药效关联较强的成分,验证其在独一味水提物抗炎药效中的贡献度。结果:建立了独一味水提物HPLC指纹图谱,共标定了16个共有峰,通过对照品指认,辨识了山栀子苷甲酯、8-O-乙酰山栀子苷甲酯、连翘酯苷B和木犀草苷等7个特征峰成分,除胡麻属苷、芦丁含量较低外,其余5种成分均有较高含量。二甲苯致耳肿胀试验结果表明,12批独一味水提物均有抑制耳肿胀作用。通过灰色关联度法和文献对比研究分析,推测山栀子苷甲酯、8-O-乙酰山栀子苷甲酯、连翘酯苷B、木犀草苷与独一味水提物抗炎作用密切相关,对此4种成分进行含量测定,含量测定结果依次为(15.319±4.228)、(26.156±7.174)、(14.376±5.817)、(12.756±2.570)mg/g。以对照品模拟活性成分配比构建药效对比验证实验确认了这一推测。结论:山栀子苷甲酯、8-O-乙酰山栀子苷甲酯、连翘酯苷B、木犀草苷可能为独一味水提物抗炎药效的关键成分群。

关键词：独一味谱效关系抗炎灰色关联度山栀子苷甲酯 8-O-乙酰山栀子苷甲酯连翘酯苷B 木犀草苷

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散光精准定位标记工具用于飞秒激光小切口角膜基质透镜取出术矫正近视散光的效果

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眼科新进展 2024年第6期44卷 475-479页

作者：胥丽萍蒋丽君姜允彬朱永唯浙江中医药大学附属嘉兴市中医医院眼科浙江省嘉兴市314000

目的探讨散光精准定位标记工具用于飞秒激光小切口角膜基质透镜取出术(SMILE)矫正近视散光的效果。方法选取2022年1月至12月在我院行SMILE且散光在-5.00~-1.25 D的患者120例120眼(均选右眼)作为研究对象,按随机数表将患者分为标记组(60... 详细信息

目的探讨散光精准定位标记工具用于飞秒激光小切口角膜基质透镜取出术(SMILE)矫正近视散光的效果。方法选取2022年1月至12月在我院行SMILE且散光在-5.00~-1.25 D的患者120例120眼(均选右眼)作为研究对象,按随机数表将患者分为标记组(60例)和不标记组(60例)。标记组患者由手术医生使用我科自主研发的散光精准定位标记工具进行标记。所有患者分别于术前及术后1 d、术后1周、术后3个月进行检查,收集术前及术后3个月的检查数据(裸眼视力、最佳矫正视力、电脑验光结果)。利用矢量分析工具计算相关散光评价指标:|平均差异矢量|(|DV|)、矫正指数(CI)、误差角度绝对值(|AofE|)。采用尼德克屈光分析仪测量患者高阶像差,包括球差、彗差、三叶草差。应用SPSS 26.0软件对两组患者相关数据进行统计学分析。结果术前两组患者最佳矫正视力、球镜度和柱镜度差异均无统计学意义(均为P>0.05)。标记组患者术后3个月裸眼视力(logMAR)优于不标记组,差异有统计学意义(P0.05)。术后3个月两组患者|DV|、CI差异均无统计学意义(均为P>0.05);术后3个月标记组患者|AofE|小于不标记组,差异有统计学意义(P0.05);术后3个月两组患者彗差、三叶草差、球差均较术前明显增加(均为P<0.05)。术后3个月标记组患者彗差小于不标记组,差异有统计学意义(P<0.05)。结论散光精准定位标记工具标记后行SMILE较不标记具有更佳的散光矫正效果,能明显优化SMILE所带来的彗差,提高患者视觉质量。

关键词：小切口角膜基质透镜取出术近视散光散光精准定位标记工具矢量分析角度偏差高阶像差视觉质量

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基于宽带声光调制的高保真相位敏感光时域反射计系统

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光学学报 2024年第1期44卷 316-324页

作者：雷艳阳姜桃飞马云宾夏猛汤晓惠隋景林杨芳杜学新董永康哈尔滨工业大学卓越工程师学院黑龙江哈尔滨150001 哈尔滨工业大学郑州研究院河南郑州450018 国家管网集团科学技术研究院河北廊坊065000 哈尔滨工业大学航天学院黑龙江哈尔滨150001

相位敏感光时域反射计(Ф-OTDR)系统通常用于振动监测中,具有响应速度快和检测灵敏度高的优势,但受相干衰落效应的影响,导致振幅较低位置提取的振动信号相位信息失真。为此,本文提出一种基于宽带声光调制的高保真Ф-OTDR传感方案,实现... 详细信息

相位敏感光时域反射计(Ф-OTDR)系统通常用于振动监测中,具有响应速度快和检测灵敏度高的优势,但受相干衰落效应的影响,导致振幅较低位置提取的振动信号相位信息失真。为此,本文提出一种基于宽带声光调制的高保真Ф-OTDR传感方案,实现对振动信号相位信息的高保真提取。该方案具有调制结构简单紧凑、相位延迟控制精确、频率分量灵活可控、不牺牲响应带宽和空间分辨率等优点。在验证实验中,灵活调制脉宽为100 ns,且同时将包含三个非等间距频率的多频探测光脉冲注入2 km的传感光纤,并以幅值评估的方式对多频拍频信号进行复用。结果表明,该方案中相干衰落的概率从17.541%降低到0.045%,并实现了对模拟振动信号相位信息的高保真重构。

关键词：相位敏感光时域反射计相干衰落效应相位信息多频脉冲调制

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土壤源Penicillium ludwigii X-16的筛选鉴定及其有机-无机氮源利用特征

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应用与环境生物学报 2024年第2期30卷 301-308页

作者：刘欣刘冉苏怡睿姜允斌邓欢张银萍韩成钟文辉南京师范大学地理科学学院南京210023 江苏省物质循环与污染控制重点实验室南京210023 南京师范大学环境学院南京210023 南京师范大学分析测试中心南京210023

将除作物吸收氮外的化学氮肥尽可能固持在土壤中,有助于提升化学氮肥利用率、减少化学氮肥施用量及降低环境氮素污染.以无机氮作为唯一氮源进行富集培养,从酸性旱地红壤中分离筛选出一株无机氮固持真菌菌株X-16,经菌株形态观测及真菌IT... 详细信息

将除作物吸收氮外的化学氮肥尽可能固持在土壤中,有助于提升化学氮肥利用率、减少化学氮肥施用量及降低环境氮素污染.以无机氮作为唯一氮源进行富集培养,从酸性旱地红壤中分离筛选出一株无机氮固持真菌菌株X-16,经菌株形态观测及真菌ITS基因同源性分析,鉴定为路德维希青霉菌(Penicillium ludwigii).进一步监测菌株在不同有机或无机氮源液体培养基中的生长状况,发现菌株X-16能利用无机氮源、氨基酸氮源和复杂有机氮源(玉米醇溶蛋白)进行生长,尤其偏爱利用复杂有机氮源.X-16在玉米醇溶蛋白氮源处理下产生了最大的微生物生物量(1.93±0.50 g/L)、最高的无机氮固持速率(0.57±0.10 mg L^(-1)h^(-1))和有机氮矿化速率(0.57±0.13 mg L^(-1)h^(-1)).相比于不接种处理,接种菌株X-16显著提升土壤化学氮肥固持速率,提升量为0.78±0.06 mg kg^(-1)d^(-1),提升幅度达492%.本研究从酸性旱地红壤中筛选出优势无机氮固持真菌菌株,该菌株能有效提升土壤无机氮固持能力,而且能将复杂有机氮源矿化后再利用,可为化肥源无机氮素固持研究及土壤源有机氮素释放研究提供理论依据和菌种资源.(图6参58)

关键词：青霉菌属氮源化学氮肥无机氮固持有机氮矿化

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Realizing simultaneously excellent energy storage and discharge properties in AgNbO_(3)based antiferroelectric ceramics via La^(3t)and Ta^(5+)co-substitution strategy

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Journal of Materiomics 2023年第2期9卷 410-421页

作者： Yuqi Zhou Shuaibing Gao Jie Huang Meng Shen Shenglin jiang yunbin He Qingfeng Zhang Hubei Key Lab of Ferro&Piezoelectric Materials and Devices School of Materials Science&EngineeringHubei UniversityWuhan430062China School of Physics and Electronic Science Hubei UniversityWuhan430062China School of Optical and Electronic Information and Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan430074China

AgNbO_(3)based antiferroelectric(AFE)ceramics have large maximum polarization and low remanent polarization,and thus are important candidates for fabricating dielectric capacitors.However,their energy storage performances have been still large difference with those of lead-based AFEs because of their room-temperature ferrielectric(FIE)behavior.In this study,novel La^(3+)and Ta^(5+)co-substituted AgNbO_(3)ceramics are designed and developed.The introduction of La^(3+)and Ta^(5+)decreases the tolerance factor,reduces the polarizability of B-site cations and increases local structure heterogeneity of AgNbO_(3),which enhance AFE phase stability and refine polarization-electric field(PeE)loops.Besides,adding La^(3+)and Ta^(5+)into AgNbO_(3)ceramics causes the decrease of the grain sizes and the increase of the band gap,which contribute to increased Eb.As a consequence,a high recoverable energy density of 6.79 J/cm3 and large efficiency of 82.1%,which exceed those of many recently reported AgNbO_(3)based ceramics in terms of overall energy storage properties,are obtained in(Ag0.88La0.04)(Nb0.96Ta0.04)O_(3)ceramics.Furthermore,the discharge properties of the ceramic with discharge time of 16 ns and power density of 145.03 MW/cm3 outperform those of many lead-free dielectric ceramics.

关键词： AgNbO_(3)antiferroelectrics Grain sizes Tolerance factor Energy storage Discharge properties

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FlexE/SPN互通协同管控技术标准化研究

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通信技术 2024年第6期57卷 632-639页

作者：江凇孟海军付易鹏李沛徐云斌贾平国网江苏省电力有限公司信息通信分公司江苏南京210000 中国信息通信研究院技术与标准研究所北京100191

当前,电力通信网领域还未开展面向多业务承载的异厂家FlexE/SPN分层分域组网互通协同管控技术的研究,无法满足异厂家切片分组网络(Slicing Packet Network,SPN)组网的统一管控和协同编排需求。梳理了FlexE/SPN管控技术的国际国内标准化... 详细信息

当前,电力通信网领域还未开展面向多业务承载的异厂家FlexE/SPN分层分域组网互通协同管控技术的研究,无法满足异厂家切片分组网络(Slicing Packet Network,SPN)组网的统一管控和协同编排需求。梳理了FlexE/SPN管控技术的国际国内标准化现状,通过研究电力通信网异厂家SPN分层分域组网互通的需求特征和典型场景,提出了电力通信网的异厂家SPN互通协同管控标准化方案,包括架构、接口和现网验证方案,形成了适用于电力通信网需求的异厂家SPN组网业务互通协同管控方案,推动SPN技术在电力通信网的发展和现网应用。

关键词： FlexE/SPN 互通协同管控标准化架构接口

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In situ SIMS oxygen isotope analyses: Evidence for the formation of aluminum-rich chondrules from ordinary chondrites

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Science China Earth Sciences 2015年第10期58卷 1748-1757页

作者： jiang Yun HSU WeiBiao GUAN yunbin WANG Ying Key Laboratory of Planetary Sciences Purple Mountain Observatory Chinese Academy of Sciences Division of Geological and Planetary Sciences California Institute of Technology

Aluminum-rich chondrules(ARCs),which share mineralogic and chemical properties with both Ca,Al-rich inclusions(CAIs)and ferromagnesian chondrules,play an important role in revealing their temporal and petrogenetic relationships.In this work,seven ARCs were found in three ordinary chondrites GRV 022410(H4),GRV 052722(H3.7)and Julesburg(L3.6).They contain bulk Al2O3~17%-33%and exhibit igneous textures composed of olivine,high-and low-Ca pyroxene,plagioclase,spinel and glass.In situ SIMS analyses show that ARCs have oxygen isotopic compositions(δ18O=–6.1‰–7.1‰;δ17O=–4.5‰–5.1‰)close to ferromagnesian chondrules but far more depleted in 16O than CAIs(δ18O=-40‰;δ17O=-40‰).Most ARCs plot close to the terrestrial mass fractionation(TF)line,and a few between the TF and carbonaceous chondrite anhydrous mixing(CCAM)lines.Plagioclase,nepheline and glass suffered O-isotopic exchanges during the metamorphism processes in the parent body.Spinel,olivine and pyroxene represent the primary O-isotopic compositions of ARCs,and define a fitted line with a slope of^0.7±0.1.Compared with the results of previous studies,shallower slope as well as more depleted16O compositions further demonstrates that ARCs in ordinary chondrites are not a simple mixing product of ferromagnesian chondrules and CAIs.Instead,they probably experienced higher-degree oxygen isotope exchange with a 16O-poor nebular gas reservoir during multiple melting episodes.

关键词：普通球粒陨石氧同位素分析 SIMS分析富铝原位氧同位素组成证据石形

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