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High nitrogen fertilizer input enhanced the microbial network complexity in the paddy soil

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Soil Ecology Letters 2024年第2期6卷 97-109页

作者： Yanan Chen Yan Li Tianyi Qiu Haoran He Ji Liu chengjiao Duan Yongxing Cui Min Huang Chunyan wu Linchuan Fang The Research Center of Soil and Water Conservation and Ecological Environment Chinese Academy of Sciences and Ministry of EducationYangling712100China State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water Conservation CAS and MWRYangling712100China University of Chinese Academy of Sciences Beijing100049China Institute of Environment Resource and Soil Fertilizer Zhejiang Academy of Agricultural SciencesHangzhou310021China College of Natural Resources and Environment Northwest A&F UniversityYangling712100China Hubei Province Key Laboratory for Geographical Process Analysis and Simulation Central China Normal UniversityWuhan430079China Department of Ecohydrology Leibniz Institute of Freshwater Ecology and Inland FisheriesBerlin12587Germany Sino-French Institute for Earth System Science College of Urban and Environmental SciencesPeking UniversityBeijing100871China College of Resources and Environmental Engineering Wuhan University of TechnologyWuhan430070China CAS Center for Excellence in Quaternary Science and Global Change Xi’an710061China

N fertilizer altered bacterial community compositions by changing soil nutrients.•Bacterial ammonia oxidation became predominated with the increasing N rate.•Excessive N input caused the information of a more complex microbial network.•Intensified microbial competition by excessive N was due to negative link ***(N)fertilization drives the structure and function of soil microbial communities,which are crucial for regulating soil biogeochemical cycling and maintaining ecosystem *** the N fertilizer effects on soil microbial composition and diversity have been widely investigated,it is generally overlooked that ecosystem processes are carried out via complex associations among microbiome ***,we examined the effects of five N fertilization levels(0,135,180,225,and 360 kg N ha−1)on microbial co-occurrence networks and key functional taxa such as ammonia-oxidizers in paddy *** results showed that N addition altered microbial community composition,which were positively related to soil total N and available phosphorus(P)*** abundance of ammonia-oxidizing archaea(AOA)significantly decreased after N addition,whereas ammonia-oxidizing bacteria(AOB)increased in N360 *** with low-N group(N0 and N135),the high-N group(N225 and N360)shaped more complex microbial webs and thus improved the stability of the microbial *** least squares path modeling further revealed that N fertilizer had a higher effect on microbial network complexity in the high-N group(0.83)than the low-N group(0.49).Although there were more positive links across all microbial networks,the proportion of negative links significantly increased in the high-N network,suggesting that excess N addition aggravated the competition among microbial *** these interactions between microbial communities and N fertilization advances our understanding of biogeochemical processes in paddy soils and their effects on nutrient supply to

关键词： nitrogen fertilizer paddy soil co-occurrence network microbial interaction

Whether and When Superhydrophobic/Superoleophobic Surfaces Are Fingerprint Repellent

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Research 2023年第1期2022卷 197-207页

作者： chengjiao wu Yue Fan Hongxin Wang Juan Li Yuxi Chen Yingke Wang Lin Liu Lidan Zhou Shilin Huang Xuelin Tian Key Laboratory for Polymeric Composite Functional Materials of Ministry of Education Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable DevicesSchool of Materials Science and EngineeringSun Yat-sen UniversityGuangzhou 510006China State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-sen UniversityGuangzhou 510006China School of Traditional Chinese Medicine Resources Guangdong Pharmaceutical UniversityGuangzhou 510006China

Driven by the ever-increasing demand for fingerprint-resistant techniques in modern society,numerous researches have proposed to develop innovative antifingerprint coatings based on superhydrophobic/superoleophobic surface ***,whether superhydrophobic/superoleophobic surfaces have favorable repellency to the microscopic fingerprint is in fact an open ***,we establish a reliable method that enables evaluating the antifingerprint capability of various surfaces in a quantitative *** show that superhydrophobicity is irrelevant with fingerprint *** superoleophobic surfaces,two distinct wetting states of microscopic fingerprint residues,i.e.,the"repellent"and the“collapsed”states,are *** in the"repellent"state,in which the fingerprint residues remain atop surface textures upon being pressed,superoleophobic surfaces can bring about favorable antifingerprint repellency,which correlates positively with their receding contact angles.A finger-deformation-dependent intrusion mechanism is proposed to account for the formation of diferent fingerprint wetting *** findings offer important insights into the mechanism of fingerprint repellency and will help the design of high-performance antifingerprint surfaces for diverse applications.

关键词： deformation mechanism fingerprint

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地下空间火灾烟气的泡沫净化技术研究

消防科学与技术 2024年第1期43卷 45-50页

作者：赵子琦吴爱军李成娇田世祥西南科技大学环境与资源学院四川绵阳621010 贵州大学矿业学院贵州贵阳550025

为了有效控制地下空间火灾烟气,本文提出一种泡沫净化的新型消烟技术,并搭建了试验平台,简要介绍了泡沫消烟技术的优点,并阐述了净化工作原理。通过试验分析不同溶液与不同烟气浓度(以CO_(2)体积分数为跟踪表征物质)对CO_(2)脱除率的影... 详细信息

为了有效控制地下空间火灾烟气,本文提出一种泡沫净化的新型消烟技术,并搭建了试验平台,简要介绍了泡沫消烟技术的优点,并阐述了净化工作原理。通过试验分析不同溶液与不同烟气浓度(以CO_(2)体积分数为跟踪表征物质)对CO_(2)脱除率的影响。研究结果表明:纯水、单体发泡液、复配发泡液3种溶液的CO_(2)脱除效率分别为38.18%、56.71%、92.2%,从而得出复配发泡液对于CO_(2)有着明显的净化效果。随着入口烟气浓度增加,CO_(2)脱除率由93.21%降低至80.85%,降幅较小,证明了该泡沫净化技术对烟气中CO_(2)良好的吸收效果。研究结果表明,泡沫对地下烟气具有明显的控制效果。

关键词：地下空间火灾烟气泡沫净化

载银聚乳酸纳米纤维复合面料传感器的制备与表征

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印染 2024年第6期50卷 18-23页

作者：彭小凡李双燕王彩虹崔振华吴双全张成蛟姚理荣徐思峻南通大学江苏南通226019 旷达汽车饰件系统有限公司江苏常州213000 江苏唐工纺实业有限公司江苏南通226000

聚乳酸(PLA)纳米纤维摩擦电材料具有良好的生物相容性和可降解性,但其驻极后易吸附细菌等微生物,影响面料耐久性和穿戴者健康安全。以PLA为保护剂原位合成纳米银溶液,所制备纳米银粒径集中于0~5 nm和10~25 nm。将上述溶液经静电纺丝得... 详细信息

聚乳酸(PLA)纳米纤维摩擦电材料具有良好的生物相容性和可降解性,但其驻极后易吸附细菌等微生物,影响面料耐久性和穿戴者健康安全。以PLA为保护剂原位合成纳米银溶液,所制备纳米银粒径集中于0~5 nm和10~25 nm。将上述溶液经静电纺丝得到载银PLA纳米纤维膜,纤维膜直径由纯PLA纳米纤维的0.7~1.4μm降至0.4~0.7μm。载银PLA纳米纤维膜与导电织物复合后,面料的抗菌性能随PLA纳米银含量的增加而提高,最佳银质量分数为300 mg/kg,对***和***的抑菌率均大于99.9%。复合面料摩擦电性能随纳米银含量增加先增加后降低,银质量分数为300 mg/kg,开路电压(VOC)峰值提高15.33%。研究表明摩擦电最佳条件为:接触频率2.0 Hz、接触压力12250 N/m^(2),相应VOC最高为99.47 V,短路电流(ISC)峰值最高为1.17μA,最高输出功率为129.35 mW/m^(2)。复合面料在监测人体运动信号方面具有良好的灵敏度。

关键词：织物传感器纳米银聚乳酸纳米纤维复合面料

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红枣中生物碱的提取工艺优化及抗氧化性分析

分子植物育种 2019年第3期17卷 972-977页

作者：张向前屈晓逸刘冲陈国梁吴成娇贺晓龙延安大学陕西省红枣重点实验室延安716000 延安大学生命科学学院延安716000

本研究以陕北狗头枣为试验材料,对乙醇回流提取法提取狗头枣生物碱工艺进行优化,并对狗头枣生物碱的抗氧化性进行分析。试验设计主要包括:单因素试验、正交试验设计、抗氧化分析试验。利用单因素试验和正交试验优选最佳提取工艺,再利用... 详细信息

本研究以陕北狗头枣为试验材料,对乙醇回流提取法提取狗头枣生物碱工艺进行优化,并对狗头枣生物碱的抗氧化性进行分析。试验设计主要包括:单因素试验、正交试验设计、抗氧化分析试验。利用单因素试验和正交试验优选最佳提取工艺,再利用生物碱对DPPH自由基的清除作用来测定其抗氧化性。利用乙醇回流提取法提取狗头枣中的生物碱最佳工艺为:料液比为1∶12,乙醇浓度为70%,提取时间为2.5 h;且狗头枣生物碱对DPPH有良好的清除作用。通过对狗头枣生物碱的抗氧化性研究,有利于我们未来对狗头枣的药用价值进行深层次的研究,为广大的种植户增收增产,从而改善他们的生活水平,是将科研与生活紧密联系的最好例证。

关键词：红枣生物碱乙醇提取抗氧化性

输尿管切开联合纤维胆道镜治疗体外冲击波碎石术后残石的研究

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临床医学工程 2012年第8期19卷 1292-1293页

作者：刘左成蔡国源李广宇吴陈窖中国海洋石油南海西部医院外科广东湛江524057

目的探讨输尿管切开联合纤维胆道镜治疗体外冲击波碎石术后残石。方法选取2008年1月至2012年3月我院收治的体外冲击波碎石术后残石患者共100例,随机分为实验组50例和对照组50例,其中实验组患者采用输尿管切开联合纤维胆道镜治疗,而对照... 详细信息

目的探讨输尿管切开联合纤维胆道镜治疗体外冲击波碎石术后残石。方法选取2008年1月至2012年3月我院收治的体外冲击波碎石术后残石患者共100例,随机分为实验组50例和对照组50例,其中实验组患者采用输尿管切开联合纤维胆道镜治疗,而对照组患者仅采用输尿管切开取石术治疗。结果实验组患者的结石取净率明显高于对照组(98.00%vs.78.00%,P<0.05)。结论输尿管切开联合纤维胆道镜治疗体外冲击波碎石术后残石,其结石取净率高、操作简便、无特殊损害,值得在临床上推广应用。

关键词：输尿管切开取石术纤维胆道镜体外冲击波碎石术后残石

煤炭企业契约化成本管理承包成本指标的确定与考核:以河南省正龙煤业有限公司城郊煤矿为例

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中国矿业 2024年第2期33卷 43-48页

作者：曾朝辰张瑞玉吴子硕丁文星刘凯刘建勇河南省正龙煤业有限公司河南永城476600 中国矿业大学经济管理学院江苏徐州221116

近年来,煤炭企业纷纷引入了契约化成本管理,替代了传统的行政命令式的成本管理模式。通过“契约化”的方式,煤炭企业内部建立起了全员积极参与的成本管理机制,有效解决了推诿扯皮、思想懒惰、责任意识不强等管理问题。但随着契约化成本... 详细信息

近年来,煤炭企业纷纷引入了契约化成本管理,替代了传统的行政命令式的成本管理模式。通过“契约化”的方式,煤炭企业内部建立起了全员积极参与的成本管理机制,有效解决了推诿扯皮、思想懒惰、责任意识不强等管理问题。但随着契约化成本管理模式的深入推进,如何确定承包成本指标并进行考核已成为能否有效实施契约化成本管理的关键问题。本文系统地总结了河南省正龙煤业有限公司城郊煤矿实施契约化成本管理的实践经验。首先,阐述了契约化成本管理整体目标的制定流程,以及如何将契约化成本管理整体目标分解为各项承包成本指标并划分给专业系统与职能科室等责任主体;其次,对契约化成本管理中成本对标考核的流程、分工等进行了介绍,并说明了如何依据契约化成本考核结果落实契约化工资兑现;最后,探讨了推行契约化成本管理的保障措施。城郊煤矿契约化成本管理承包成本指标的确定与考核体系的有效实施,激发了各责任主体主动参与成本管理,为煤炭企业成本管控提供了宝贵的实践经验。

关键词：契约化成本管理承包成本指标专业系统职能科室对标考核

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population pharmacokinetic and pharmacodynamic properties of eptifibatide in the Inhibition of platelet aggregation in healthy Chinese subjects

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population pharmacokinetic and pharmacodynamic properties of...

2018年中国药理学会定量药理学专业委员会学术年会

作者： Hong Zhang Min wu Cuiyun Li Xiaojiao Li Jingrui Liu chengjiao Liu Yue Hu Yanhua Ding Zheng Jiao Phase I Clinical Research Center The First Hospital of Jilin University Department of Pharmacy Huashan HospitalFudan University

Background:Inhibition of platelet aggregation is an independent predictor of adverse events following percutaneous coronary intervention(PCI).Glycoprotein(GP) Ⅱb-Ⅲa inhibitors dosedependently prevent platelet ***,a GP Ⅱb-Ⅲa inhibitor(GPI),has been safely and successfully used for the treatment of non-ST-segment elevation acute coronary syndromes(NSTE ACS) and in patients undergoing *** has not been widely used in Chinese patients,and to date,the dose--response relationship has not been systematically evaluated for the proper selection of dose regimen Object:The present study aimed to evaluate the pharmacokinetic(PK) properties and its antiplatelet aggregation activity of eptifibatide in healthy Chinese subjects,then to predicate the clinic dosage in Chinese ***:Eptifibatide was administrated by intravenous bolus injection of 180μg/kg for 3 min,followed by an intravenous infusion of 2 μg/kg/min to 24 h.A second intravenous bolus injection of eptifibatide(180 μg/kg) was given 10 min after the first bolus from the label(Supplemental Figure 1).Venous blood samples(8 mL) were collected at pre-dose and 3 min,13 min,30 min,45 min,1 h,2 h,6 h,12 h,24 h, 24.25 h,24.5 h,26 h,28 h,32 h,and 36 h after the first bolus *** samples were used for the PK assay and the assessment of antiplatelet aggregation *** eptifibatide concentrations and antiplatelet aggregation activities were evaluated using nonlinear mixed-effects modeling and noncompartmental *** assessments included adverse events,hematology,and biochemistry ***:Twelve healthy subjects were enrolled and completed the study.A total of 206 plasma samples were ***-state concentrations were achieved at 0.5 to 24 h post-dose from the PK *** T was 13 min,and the mean t was 148.19 *** complete inhibition of platelet aggregation occurred at 3 min after *** the Pop-PK analysis,a threecompartment disposition model exh

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80例小儿难治性肺炎临床病因分析

武汉大学学报（医学版） 2010年第1期31卷 125-128页

作者：吴晓林黄成姣周小勤任家红湖北省妇幼保健院儿内科湖北武汉430070

目的:对80例小儿难治性肺炎进行临床回顾性分析,探讨临床难治性肺炎病因及可行诊疗方法。方法:对湖北省妇幼保健院80例难治性肺炎进行临床常规实验室检查和纤支镜检查,同时局部行支气管肺泡灌洗,收集标本进行培养,并与入院时痰培养结果... 详细信息

目的:对80例小儿难治性肺炎进行临床回顾性分析,探讨临床难治性肺炎病因及可行诊疗方法。方法:对湖北省妇幼保健院80例难治性肺炎进行临床常规实验室检查和纤支镜检查,同时局部行支气管肺泡灌洗,收集标本进行培养,并与入院时痰培养结果比较。结果:纤支镜检查合并肺不张24例,合并支气管肺发育不良者5例(6.25%),原发性纤毛不动症4例(5%);气管、支气管内膜充血39例,苍白14例,糜烂3例,内膜增厚4例,支气管受压4例,不规则新生物1例,赘生物1例,炎性狭窄4例,气管软化2例,可疑结核1例,纤维条索延伸(塑性)2例;灌洗液培养阳性31例(38.9%)。大肠埃希氏菌10例,肺炎克雷伯菌5例,铜绿假单胞4例,真菌4例等。入院时痰培养阳性23例,阳性率28.9%。大肠埃希氏菌5例,白色念珠菌3例,白假丝酵母菌2例,铜绿假单胞4例,肺炎链球菌2例,肺炎克雷伯杆菌2例,格高菲肠杆菌、卡他布兰汉菌、黏质沙雷菌、鲍氏不动杆菌各1例等。药敏结果:大肠埃希氏菌、铜绿假单胞菌、肺炎克雷伯杆菌对泰能、美平敏感性高,对阿莫西林、常规使用的头孢二代(头孢夫辛)、三代敏感性下降(头孢噻肟)。临床上不经常使用的相对耐药低,如头孢西丁、哌拉西林/他唑巴坦、吡喹酮类和氨基糖甙抗生素。结论:本文28例患者根据纤支镜支气管肺泡盥洗液结果调整用药,均取得很好的效果。必要时尽早进行纤支镜检查和灌洗液培养,提高临床诊疗效果。

关键词：小儿难治性肺炎纤支镜支气管肺泡盥洗