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Effects of Silver Nanoparticles on Soil Ammonia-Oxidizing Microorganisms Under Temperatures of 25 and 5℃

Pedosphere 2018年第4期28卷 607-616页

作者： HUANG Juan CAO Chong li runqing GUAN Wenzhu Deptartment of Municipal Engineering School of Civil Engineering Southeast University

The excellent bactericidal performance of silver nanoparticles （Ag NPs） has led to their wide applications, resulting in increasing concerns about their potential environmental impacts. This study evaluated the influences of different concentrations of Ag NPs （0, 1, 10, and 100 μg g^-1 dry soil） on the ammonia-oxidizing microorganisms in soil at cultivation temperatures of 25 and 5 ℃ for 37 d. The results showed that 1μg g^-1 dry soil of Ag NPs had no acute effects on the ammonia-oxidizing microorganisms. However, 10 and 100μg g^-1 dry soil of Ag NPs levels were found to significantly inhibit the activities of soil nitrification, with a decrease of 69.89% and 94.55%, respectively, at 25 ℃ and 61.65% and 83.79%, respectively, at 5℃ compared to the control （0 μg g^-1 dry soil of Ag NPs）. These levels of Ag NPs also obviously decreased soil urease activity from about 380.47 ± 0.07 （at 5℃） and 529.76 ± 13.44 （at 25℃） mg N g^-1 dry soil d^-1 to 61.70 ± 2.97 and 68.29 ± 8.22 mg N g^-1 dry soil d^-1, respectively, after 37 d of cultivation. Quantitative polymerase chain reaction showed the abundance of ammonia-oxidizing archaea and bacteria. For the same exposure time, the effects of Ag NPs on the activities of ammonia-oxidizing microorganisms and urease decreased with decreasing temperature. The threshold concentration of Ag NPs that induced negative effects on ammonia-oxidizing microorganisms was higher at 5 -C than at 25 -C. Therefore, the temperature has a major impact on the toxicity of Ag NPs to ammonia-oxidizing microorganisms and on the urease activity, with toxicity being reduced with decreasing temperature.

关键词： archaea bacteria biological toxicity nitrification activity polymerase chain reaction urease activity

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Numerical investigations on cluster characteristics in the supercritical water circulating fluidized bed riser

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Particuology 2024年第11期94卷 281-293页

作者： Kenan Xi runqing li Xiazhi li Mei li Xiudong Xu Yu Zhang Hao Wang Youjun Lu Northwest Institute of Nuclear Technology Xi'an710024China State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong UniversityXi'an710049China Xi'an Institute of Applied Optics Xi'an710065China

There are currently no reports about clusters in the supercritical water circulating fluidized bed(SCWCFB).Simulations were conducted to investigate the numbers,diameters,aspect ratios,circularity,and orientation angles of cluster in the riser of SCWCFB via two-fluid model across different flow velocities,solid circulation rates,pressures,and *** results show that cluster numbers are mainly between 10 and 80 per *** are more at the bottom but less at the top,and more near the wall but less at the *** diameters are mainly between 0.2 and 0.5 times the bed *** are large at the bottom but small at the top,and large at the center but small near the *** aspect ratios are mainly between 0 and 1,indicating that most clusters have shorter width than their ***-like clusters are more likely to appear near the walls,and clusters at the center of the riser are more likely to be *** circularity is mainly between 0.2 and 0.4,suggesting that the shapes of clusters are far from the *** absolute values of cluster orientation angles are mainly between 75°and 90°,indicating that most clusters move in the vertical *** fluid velocities may facilitate cluster coalescence.

关键词： Supercritical water Circulating fluidized bed Cluster Two-fluid model Riser

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Robust reactive oxygen species modulator hitchhiking yeast microcapsules for colitis alleviation by trilogically intestinal microenvironment renovation

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Bioactive Materials 2024年第6期36卷 203-220页

作者： Jintao li Jian Song Zhichao Deng Jian Yang Xiaoqin Wang Bowen Gao Yuanyuan Zhu Mei Yang Dingpei Long Xiaoqin Luo Mingxin Zhang Mingzhen Zhang runqing li Department of Radiology the First Affiliated HospitalSchool of Public HealthXi’an Jiaotong UniversityXi’anShaanxi710061China Institute of Cardiovascular Sciences Guangxi Academy of Medical Sciencesthe People’s Hospital of Guangxi Zhuang Autonomous RegionNanningGuangxi530021China School of Basic Medical Sciences Xi’an Jiaotong UniversityXi’anShaanxi710061China Department of Clinical Laboratory the First Affiliated Hospital of Xi’an Jiaotong UniversityXi’anShaanxi710061China Department of Thoracic Surgery the First Affiliated Hospital of Xi’an Jiaotong UniversityXi’anShaanxi710061China State Key Laboratory of Resource Insects Institute of Sericulture and Systems BiologySouthwest UniversityChongqing400715China Department of Gastroenterology The First Affiliated Hospital of Xi’an Medical UniversityXi’anShaanxi710077China

Ulcerative colitis(UC)is characterized by chronic inflammatory processes of the intestinal tract of unknown *** treatments lack understanding on how to effectively alleviate oxidative stress,relieve inflammation,as well as modulate gut microbiota for maintaining intestinal homeostasis *** this study,a novel drug delivery system based on a metal polyphenol network(MPN)was constructed via metal coordination between epigallocatechin gallate(EGCG)and Fe^(3+).Curcumin(Cur),an active polyphenolic compound,with distinguished anti-inflammatory activity was assembled and encapsulated into MPN to generate *** obtained Cur-MPN could serve as a robust reactive oxygen species modulator by efficiently scavenging superoxide radical(O_(2)•-)as well as hydroxyl radical(⋅OH).By hitchhiking yeast microcapsule(YM),Cur-MPN was then encapsulated into YM to obtain CM@*** findings demonstrated that CM@YM was able to protect Cur-MPN to withstand the harsh gastrointestinal environment and enhance the targeting and retention abilities of the inflamed *** administered orally,CM@YM could alleviate DSS-induced colitis with protective and therapeutic effects by scavenging ROS,reducing pro-inflammatory cytokines,and regulating the polarization of macrophages to M1,thus restoring barrier function and maintaining intestinal ***,CM@YM also modulated the gut microbiome to a favorable state by improving bacterial diversity and transforming the compositional structure to an anti-inflammatory phenotype as well as increasing the content of short-chain fatty acids(SCFA)(such as acetic acid,propionic acid,and butyric acid).Collectively,with excellent biocompatibility,our findings indicate that synergistically regulating intestinal microenvironment will be a promising approach for UC.

关键词： Ulcerative colitis Metal polyphenol network Reactive oxygen species Yeast microcapsules Intestinal microenvironment

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Differences in the system accuracy acceptability of four types of blood glucose monitoring systems against five different standards

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iLABMED 2024年第2期2卷 70-78页

作者： Tengjiao Wang lina Zhang lijun Gong Yangmei Xin liang Han Na li Peng Peng Xiuying Zhao runqing li Laboratory Medicine Department Beijing Tsinghua Changgung HospitalSchool of Clinical MedicineTsinghua UniversityBeijingChina Operations Management Department Beijing Tsinghua Changgung HospitalSchool of Clinical MedicineTsinghua UniversityBeijingChina Nursing Department Beijing Tsinghua Changgung HospitalSchool of Clinical MedicineTsinghua UniversityBeijingChina Equipment Management Department Beijing Tsinghua Changgung HospitalSchool of Clinical MedicineTsinghua UniversityBeijingChina Clinical Administration Department Beijing Tsinghua Changgung HospitalSchool of Clinical MedicineTsinghua UniversityBeijingChina

Objective:This study aimed to evaluate the system accuracy of four types of blood glucose monitoring systems(BGMSs)and explore the differences in the system accuracy acceptability of each BGMS against five different ***:The glucose measurement values obtained from four types of BGMSs(Roche Accu-Chek® Performa,Bayer Contour™ TS,Sinomedisite Glupad® H1 Plus,and Sinocare® Gold-Accu)were evaluated against the reference values obtained from the biochemical analyzer of the central *** system accuracy acceptability of each BGMS was determined using the criteria specified in five standards,namely the International Organization for Standardization(ISO)15197:2003,Clinical Laboratory Standards Institute(CLSI)POCT12-A3,ISO 15197:2013,Chinese Society of Laboratory Medicine(CSLM)consensus,and US Food and Drug Administration(FDA)***:From 2018 to 2022,10,980 pairs of measurement values were obtained from 366 glucose meters of four types of *** correlations were observed between the glucose measurement values from the BGMSs and the reference values from the biochemical analyzer of the central *** correlation coefficient r was 0.995 for Roche Accu-Chek® Performa,0.994 for Bayer Contour™ TS,0.983 for Sinomedisite Glupad® H1 Plus,and 0.997 for SinocareR *** acceptability criteria specified in ISO 15197:2003 were met by 100.00%(135/135)of the glucose meters of Roche Accu-Chek® Performa,100.00%(109/109)of Bayer Contour™ TS,81.61%(71/87)of Sinomedisite Glupad® H1 Plus,and 100.00%(35/35)of SinocareR ***,the acceptability criteria specified in ISO 15197:2013 were met by 99.26%(134/135)of the glucose meters of Roche Accu-Chek® Performa,88.07%(96/109)of Bayer Contour™ TS,58.62%(51/87)of Sinomedisite Glupad R H1 Plus,and 91.43%(32/35)of SinocareR ***:Among the four types of BGMSs evaluated,the glucose meters of Roche Accu-Chek® Performa exhibited superior system *** system accura

关键词： blood glucose blood glucose monitoring system comparative study data accuracy

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分子振光谱中的吸电子效应和供电子效应

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光谱学与光谱分析 2000年第5期20卷 706-708页

作者：刘翠华李润卿周维义李玉荷天津大学材料科学与工程学院天津300072

本文就分子振动光谱中的吸电子效应和供电子效应提出了新观点 :对共价键来说 ,吸电子效应使化学键强度增加 ,因而伸缩振动频率升高 ;供电子效应使供价键强度减弱 ,因而伸缩振动频率降低。对于配价键而言 ,如果取代基和配价键中提供电子... 详细信息

本文就分子振动光谱中的吸电子效应和供电子效应提出了新观点 :对共价键来说 ,吸电子效应使化学键强度增加 ,因而伸缩振动频率升高 ;供电子效应使供价键强度减弱 ,因而伸缩振动频率降低。对于配价键而言 ,如果取代基和配价键中提供电子对的原子相连 ,则供电子取代基使配价键加强 ,因而配价键的伸缩振动频率升高 ;吸电子取代基使配价键减弱 ,因而其伸缩振动频率降低。如果取代基和配价键中的受电子原子相连 ,则取代基的电子效应正好相反。

关键词：分子振动光谱吸电子效应供电子效应化学键

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Accuracy evaluation of Roche Accu-Chek Performa blood glucose meters at low glucose concentrations:A nine-year retrospective study

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iLABMED 2024年第3期2卷 141-148页

作者： Zhipeng Zhao runqing li Xiuying Zhao lina Zhang Tengjiao Wang Song Yang Ning Han Dong Zhu Laboratory Medicine Department of Beijing Tsinghua Changgung Hospital School of Clinical MedicineTsinghua UniversityBeijingChina Operations Management Department of Beijing Tsinghua Changgung Hospital School of Clinical MedicineTsinghua UniversityBeijingChina

Objective:To evaluate the accuracy of Roche Accu-Chek Performa glucose meters at a low glucose concentration of<5.55 mmol/L(100 mg/dL)over a 9-year ***:The accuracy of the Roche Accu-Chek Performa glucose meters at lo... 详细信息

Objective:To evaluate the accuracy of Roche Accu-Chek Performa glucose meters at a low glucose concentration oflity criteria specified in International Organization for Standardization(ISO)15197:*** samples with low glucose concentrations oflinical use duration spanned from 1 to 9 years and 40.76%(86 out of 211 glucose meters)had been used for more than 2 *** correlation coefficient r between glucose meter measurements and laboratory reference values was 0.98(plity criteria specified in ISO 15197:*** a low glucose concentration of<5.55 mmol/L,99.90%(2975 out of 2978)of the comparative data pairs in the error distribution fell within the range of±0.83 mmol/L(15 mg/dL).Parkes consensus error grid analysis showed that 100.00%(2978 out of 2978)of comparative data pairs fell within region ***:This study demonstrated that Roche Accu-Chek Performa glucose meters successfully met the accuracy standards of ISO 15197:2013 for measuring blood glucose within the hypoglycemic *** attention should be given to the performance of blood glucose monitoring systems in the

关键词： blood glucose monitoring system comparative study diabetes low glucose concentration point-of-care

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Nitrification intensity and ammonia-oxidizing bacteria and archaea in different wetland plant rhizosphere soils

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Journal of Southeast University(English Edition) 2017年第4期33卷 466-472页

作者： Yan Chunni Huang Juan Yang Sisi Cao Chong Peng Cheng li runqing School of Civil Engineering Southeast University Nanjing 210096 China

In order to explore the nitrogen removal process in constructed wetlands(CW s),the moisture,ammonia nitrogen(NH4+-N),nitrate nitrogen(NO3"-N)and nitrification intensity in three wetland plant rhizosphere soils(Acorns calamus,Typha orientalis,Iris pseudacorus)were investigated at a relatively normal temperature range of15to25The relative abundance of ammonia-oxidizing bacteria(AOB)and ammonia-oxidizing archaea(AOA)were also achieved using fluorescence in situ hybridization(FISH).It is found that *** achieves the highest nitrification intensity of2.03m g(h?kg)while the second is ***(1.74m g/(h?kg)),and followed by ***(1.65m g/(h?kg))throughout the *** reveals that the abundance of bacteria(1010g_1wet soil)is higher than that of archaea(109g_1wet soil),and AOBare the dominant bacteria in the ammonia oxidation *** abundance of AOB in te rhizosphere soils from high to low ***(1.88x1010g"1),I pseudacorus(1.23x1010g1),***(5.07x109g"1)while the abundance of AOA from high to low ae ***(4.00x109g1),***(3.52x109g"1),***(3.48x109g"1).The study provides valuable evidence of plant selection for nitrogen removal in CWs.

关键词： wetland plant rhizosphere nitrification intensity ammonia-oxidizing bacteria ammonia-oxidizing archaea florescence in situ hybridization

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有机结构波谱中二级结构效应机理的新探索(Ⅱ)——π→p共轭效应和超共轭效应

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化学通报 2001年第4期64卷 232-235页

作者：李润卿渠荣遴闫颖李娜邝青天津大学材料学院天津300072

当H原子和形成π键的原子相连时 ,π成键轨道和π 反键轨道与H原子的 2p空轨道相互作用 ,组成新的分子轨道 ,这样的结构称为π→p共轭体系。由π→p共轭作用引起的不饱键一系列性质的变化。

关键词： π→p 共轭效应超共轭效应紫外光谱红外光谱核磁共振波谱有机结构波谱二级结构效应机理

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在阅读中融入写作,在写作中植入阅读——以小学语文教学为例

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当代家庭教育 2022年第21期 126-128页

作者：李润卿甘肃省甘谷县礼辛学区

阅读和写作在语文教育中所占的比重是其他部分无法比拟的,二者相依相存,不可分离。一方面,教师可以通过让学生阅读大量的书籍,提升学生对写作方面的掌握程度,如情感、兴趣、素材、技巧等;另一方面,教师可以通过激发学生对写作的探索欲望... 详细信息

阅读和写作在语文教育中所占的比重是其他部分无法比拟的,二者相依相存,不可分离。一方面,教师可以通过让学生阅读大量的书籍,提升学生对写作方面的掌握程度,如情感、兴趣、素材、技巧等;另一方面,教师可以通过激发学生对写作的探索欲望,提高学生的阅读技能。如此,促使学生在教师的悉心帮助下达到一举两得的成效。本文将从以下几方面进行深入的探讨:阅读与写作之间的联系、小学语文阅读与写作教学中存在的问题、两者之间的相互作用。

关键词：小学语文阅读写作融合

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高中生化学学习过程中学习风格影响因素研究

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当代化工研究 2019年第2期 18-19页

作者：李润青河北省石家庄市第二中学河北050004

高中化学作为主要的学科之一,对学生的成绩有着极大的影响,因此高中生在实际中必须要重视化学学习的作用,探索提升化学学习效率的方法。而对于高中生来说,学习风格的形成会对其化学学习效果产生直接的影响,因此则需要根据学习风格的形... 详细信息

高中化学作为主要的学科之一,对学生的成绩有着极大的影响,因此高中生在实际中必须要重视化学学习的作用,探索提升化学学习效率的方法。而对于高中生来说,学习风格的形成会对其化学学习效果产生直接的影响,因此则需要根据学习风格的形成因素及特征来进行分析,以此作为依据来选用在高中化学学习过程中形成良好学习风格的方式。

关键词：高中生化学学习学习风格影响因素

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