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氮添加对黄土丘陵区草地土壤磷组分的影响

生态学杂志 2024年第8期43卷 2472-2479页

作者：卢笑玥朱运李江文邓健徐莉萍吴林豪张丹延安大学生命科学学院陕西延安716000

磷是陆地生态系统植物生长的限制性元素之一,氮沉降会通过调控土壤磷循环过程改变磷素活性和生物有效性,但目前关于氮沉降下草地土壤磷组分变化及其影响因素的认识依然有限。本研究以黄土丘陵区草地为对象,基于野外3年不同水平氮添加试... 详细信息

磷是陆地生态系统植物生长的限制性元素之一,氮沉降会通过调控土壤磷循环过程改变磷素活性和生物有效性,但目前关于氮沉降下草地土壤磷组分变化及其影响因素的认识依然有限。本研究以黄土丘陵区草地为对象,基于野外3年不同水平氮添加试验,测定土壤磷组分、土壤理化性质、土壤微生物生物量和磷转化酶活性,旨在揭示氮添加对草地土壤磷组分的影响及其调控途径。结果表明:土壤中、高活性磷含量随着氮添加浓度增加显著增加,稳定态磷含量随着氮添加浓度增加显著下降;氮添加导致有机磷含量显著增加了1.71.~5.1.%,但无机磷含量显著下降。氮添加降低了土壤pH,高浓度氮添加促进了土壤碳、氮、磷的积累,并使土壤微生物生物量碳、氮、磷含量分别增加了1..1.%、38.27%、41.73%;随氮添加水平增加,土壤碱性磷酸单酯酶、磷酸二酯酶和植酸酶活性均先降低后升高。土壤养分、pH、微生物生物量和酶活性对土壤磷组分变化的解释率为68.64%;结构方程模型分析结果表明,氮添加引起了土壤微生物代谢底物养分的变化,进而对微生物生物量和磷转化胞外酶活性产生显著影响,并通过这两个途径共同调控土壤磷组分。

关键词：氮沉降磷组分微生物磷酸酶活性黄土丘陵区

Lamb waves topological imaging combining with Green’s function retrieval theory to detect near filed defects in isotropic plates

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Chinese Physics B 2019年第7期28卷 286-292页

作者： Hui zhang Hai-{1. zhang Meng-yun xu Guo-Peng fan Wen-Fa Zhu Xiao-Dong Chai Shanghai Institute for Advanced Communication and Data Science School of Communication and Information Engineering Shanghai University Shanghai 200444 China School of Urban Railway Transportation Shanghai University of Engineering Science Shanghai 201620 China

A method of combining Green’s function retrieval theory and ultrasonic array imaging using Lamb waves is presented to solve near filed defects in thin aluminum *** defects are close to the ultrasonic phased array and satisfy the near field calculation *** field acoustic information of defects is obscured by the nonlinear effects of initial wave signal in a directly acquired response using the full matrix capture mode.A reconstructed full matrix of inter-element responses is produced from cross-correlation of directly received ultrasonic signals between sensor *** new matrix eliminates the nonlinear interference and restores the near-field defect *** topological imaging method that was developed in recent ultrasonic inspection is used for displaying the *** experiments are conducted on both thin aluminum plates containing two and four defects, *** results show that these defects are clearly identified when using a reconstructed full *** spatial resolution is equal to about one wavelength of the selectively excited mode and the identifiable defect is about one fifth of the ***, in a conventional directly captured image,the images of defects overlap together and cannot be *** proposed method reduces the background noise and allows for effective topological imaging of near field defects.

关键词： Lamb waves topological imaging cross-correlation Green’s function

Phase precipitation and corrosion properties of copper-bearing ferritic stainless steels by annealing process

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Journal of Iron and Steel Research International 2023年第11期30卷 2280-2292页

作者： fan Wang De-ning Zou {1.g-yu yan Ying-bo zhang Ji-xiang Pan yun-xia Cheng Ran xu Yi-cheng Jiang School of Metallurgy and Engineering Xi’an University of Architecture and TechnologyXi’an710055ShaanxiChina Shaanxi Special Equipment Inspection and Testing Institute Xi’an710048ShaanxiChina Jilin Railway Technology College Jilin132200JilinChina Stainless Steel Branch of Gansu Jiu Steel Group Hongxing Iron and Steel Co. Ltd.Jiayuguan735100GansuChina

The effects of different annealing processes on the phase precipitation behavior and corrosion properties of copper-bearing 430 ferritic stainless steel were systematically *** shape,quantity and distribution of copper-rich precipitates by different annealing processes were characterized by scanning electron microscopy,transmission electron microscopy,backscatter electron and backscatter *** pitting resistance behavior in simulated physiological saline envi-ronments(0.9 wt.%NaCl)was investigated using electrochemical workstation and X-ray photoelectron *** results showed that the copper-rich phase prepared by repeated rolling and annealing gradually changed from long needle-like to short thick rod-like and granular,whose distribution tended to be uniform and diffusive,and the number of copper-rich phases *** solution/antibacterial annealing process,the size and density of the copper-rich phase increase,resulting in a discontinuity of the passivation film on the stainless steel,which reduces the pitting resistance to some *** refinement mechanism revealed that pre-deformation brings about a modification in both precipitation mechanism and growth kinetics of epsilon copper.

关键词： 430 stainless steel Annealing Cu-rich phase Pitting corrosion Passivation film

Measurement of solar pp neutrino flux using electron recoil data from PandaX-4T commissioning run

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Chinese Physics C 2024年第9期48卷 1-7,300页

作者： Xiaoying Lu Abdusalam Abdukerim Zihao Bo Wei Chen xun Chen yunhua Chen Chen Cheng Zhaokan Cheng Xiangyi Cui Yingjie fan Deqing fang Lisheng Geng Karl Giboni xuyuan Guo Chencheng Han Ke Han Changda He Jinrong He Di Huang Junting Huang Zhou Huang Ruquan Hou Yu Hou Xiangdong Ji Yonglin Ju Chenxiang Li Jiafu Li Mingchuan Li Shuaijie Li Tao Li Qing Lin Jianglai Liu Congcong Lu Lingyin Luo yunyang Luo Wenbo Ma Yugang Ma Yajun Mao Yue Meng xuyang Ning Binyu Pang Ningchun Qi Zhicheng Qian Xiangxiang Ren Nasir Shaheed Xiaofeng Shang Xiyuan Shao Guofang Shen Manbin Shen Lin Si Wenliang Sun Yi Tao Anqing Wang Meng Wang Qiuhong Wang Shaobo Wang Siguang Wang Wei Wang Xiuli Wang xu Wang Zhou Wang Yuehuan Wei Mengmeng Wu Weihao Wu Yuan Wu Mengjiao Xiao Xiang Xiao Kaizhi Xiong Binbin yan Xiyu yan Yong yang Chunxu Yu Ying Yuan Zhe Yuan Youhui yun xinning Zeng Minzhen zhang Peng zhang Shibo zhang Shu zhang Tao zhang Wei zhang yang zhang Yingxin zhang Yuanyuan zhang Li Zhao Jifang Zhou Ning Zhou Xiaopeng Zhou Yubo Zhou Zhizhen Zhou Research Center for Particle Science and Technology Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China Key Laboratory of Particle Physics and Particle Irradiation of Ministry of Education Shandong UniversityQingdao 266237China School of Physics and Astronomy Shanghai Jiao Tong UniversityKey Laboratory for Particle Astrophysics and Cosmology(MoE)Shanghai Key Laboratory for Particle Physics and CosmologyShanghai 200240China New Cornerstone Science Laboratory Tsung-Dao Lee InstituteShanghai Jiao Tong UniversityShanghai 200240China Shanghai Jiao Tong University Sichuan Research Institute Chengdu 610213China Jinping Deep Underground Frontier Science and Dark Matter Key Laboratory of Sichuan Province Liangshan 615000China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China School of Physics Sun Yat-Sen UniversityGuangzhou 510275China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China Department of Physics Yantai UniversityYantai 264005China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China School of Physics Beihang UniversityBeijing 102206China Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 102206China Peng Huanwu Collaborative Center for Research and Education Beihang UniversityBeijing 100191China Southern Center for Nuclear-Science Theory(SCNT) Institute of Modern PhysicsChinese Academy of SciencesHuizhou 516000China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China Department of Physics University of MarylandCollege ParkMaryland 20742USA State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China School of Physics Peking UniversityBeijing 100871Ch

The proton-proton(pp)fusion chain dominates the neutrino production in the *** uncertainty of the predicted pp neutrino flux is at the sub-percent level,whereas that of the best measurement is O(1.%).In this study,for the first time,we measure solar pp neutrinos in the electron recoil energy range from 24 to 1.4 keV using the PandaX-4T commissioning data with 0.63 tonne×year *** pp neutrino flux is determined as(8.0±3.9(stat)±1..0(syst))×1.1. s^(-1.cm^(-2),which is consistent with the Standard Solar Model and existing measurements,corresponding to an upper flux limit of 23.3×1.^(1.)s^(-1.cm^(-2)at 90%C.L..

关键词： solar pp neutrino flux PandaX-4T electron recoil spectrum

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流化床锅炉多源废弃物耦合利用技术现状

节能技术 2024年第2期42卷 186-192页

作者：张世鑫赵云增许燕飞郭涛江建忠曹林涛邓磊西安华电清洁能源技术有限公司陕西西安710061 万华化学(宁波)热电有限公司浙江宁波315812 福建华电丰海发电有限公司福建永安366000 西安交通大学动力工程多相流国家重点实验室陕西西安710049

循环流化床锅炉优良的燃烧特性适于多源废弃物的耦合燃烧利用,为便于流化床锅炉用户选择工艺路线,避免浪费时间及资源,本文对多源废弃物在循环流化床中耦合利用技术现状进行归纳整理。笔者将多源废弃物耦合燃烧利用以固态、气态、液态... 详细信息

循环流化床锅炉优良的燃烧特性适于多源废弃物的耦合燃烧利用,为便于流化床锅炉用户选择工艺路线,避免浪费时间及资源,本文对多源废弃物在循环流化床中耦合利用技术现状进行归纳整理。笔者将多源废弃物耦合燃烧利用以固态、气态、液态三大类进行了归纳总结,并对多源废弃物耦合燃烧利用技术关键点进行了说明。建议用户耦合燃烧利用废弃物时保持科学、谨慎的态度,充分调查研究,避免造成人力、物力浪费及经济损失。

关键词：流化床废弃物耦合利用技术关键点技术现状

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A highly immunogenic live-attenuated vaccine candidate prevents SARS-CoV-2 infection and transmission in hamsters

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The Innovation 2022年第2期3卷 126-135页

作者： Xiao-Feng Li Zhen Cui Hang fan Qi Chen Lei Cao Hong-Ying Qiu Na-Na {1. yan-Peng xu rong-rong {1. Chao Zhou Qing Ye Yong-Qiang deng yan Guo Si Qin Kaiyue fan Lei Wang Zijing Jia Yujun Cui Xiangxi Wang Cheng-Feng Qin Department of Virology State Key Laboratory of Pathogen and BiosecurityBeijing Institute of Microbiology and EpidemiologyAcademy of Military Medical SciencesBeijing 100071China CAS Key Laboratory of Infection and Immunity National Laboratory of MacromoleculesInstitute of BiophysicsChinese Academy of SciencesBeijing 100101China School of Medicine Tsinghua UniversityBeijing 100084China Research Unit of Discovery and Tracing of Natural Focus Diseases Chinese Academy of Medical SciencesBeijing 100071China

The highly pathogenic and readily transmissible SARS-CoV-2 has caused a global coronavirus pandemic,urgently requiring effective countermeasures against its rapid *** available vaccine platforms are being used to generate safe and effective COVID-1. ***,we generated a live-attenuated candidate vaccine strain by serial passaging of a SARSCoV-2 clinical isolate in Vero cells.

关键词： vaccine attenuated infection

Comprehensive annotation of the Chinese tree shrew genome by large-scale RNA sequencing and long-read isoform sequencing

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Zoological Research 2021年第6期42卷 692-709页

作者： Mao-Sen Ye Jin-yan {1. Dan-Dan Yu Min xu Ling xu Long-Bao Lv Qi-yun Zhu Yu fan Yong-Gang Yao Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences&yunnan Province KIZ/CUHK Joint Laboratory of Bioresources and Molecular Research in Common DiseasesKunming Institute of ZoologyChinese Academy of SciencesKunmingYunnan 650204China Kunming College of Life Science University of Chinese Academy of SciencesKunmingYunnan 650204China National Resource Center for Non-Human Primates National Research Facility for Phenotypic&Genetic Analysis of Model Animals Primate Facility) Kunming Institute of ZoologyChinese Academy of SciencesKunmingYunnan 650107China 4 State Key Laboratory of Veterinary Etiological BiologyLanzhou Veterinary Research InstituteChinese Academy of Agricultural SciencesLanzhouGansu 730046China

The Chinese tree shrew(Tupaia belangeri chinensis)is emerging as an important experimental animal in multiple fields of biomedical *** reference genome annotation for both mRNA and long non-coding RNA(lncRNA)is crucial for developing animal models using this *** the current study,we collected a total of 234 high-quality RNA sequencing(RNA-seq)datasets and two long-read isoform sequencing(ISO-seq)datasets and improved the annotation of our previously assembled high-quality chromosomelevel tree shrew *** obtained a total of 351. newly annotated coding genes and 50576 lncRNA *** also characterized the tissuespecific expression patterns and alternative splicing patterns of mRNAs and lncRNAs and mapped the orthologous relationships among 1. mammalian species using the current annotated *** identified 1.4 tree shrew-specific gene families,including interleukin 6(IL6)and STT3 oligosaccharyltransferase complex catalytic subunit B(STT3B),which underwent significant changes in *** of the overall expression patterns in tissues and pathways across four species(human,rhesus monkey,tree shrew,and mouse)indicated that tree shrews are more similar to primates than to mice at the tissue-transcriptome ***,the newly annotated purine rich element binding protein A(PURA)gene and the STT3B gene family showed dysregulation upon viral *** updated version of the tree shrew genome annotation(KIZ version 3:TS_3.0)is available at http://*** and provides an essential reference for basic and biomedical studies using tree shrew animal models.

关键词： Tree shrew Genome annotation Transcriptome Gene family Virus infection

PhaseⅡstudy of oxaliplatin combined with S-1.and leucovorin(SOL)for Chinese patients with metastatic colorectal cancer

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Chinese Journal of Cancer 2016年第3期35卷 126-132页

作者： zhi-qiang wang dong-sheng zhang nong xu de-{1. luo yan-hong deng feng-hua wang hui-yan luo miao-zhen qiu yu-hong li rui-hua xu Sun Yat‑sen University Cancer Center State Key Laboratory of Oncology in South ChinaCollaborative Innovation Center of Cancer Medicine510060 GuangzhouGuangdongP.R.China Department of Medical Oncology Sun Yat-sen University Cancer Center651 Dongfeng Road East510060 GuangzhouGuangdongP.R.China Department of Medical Oncology The First Affiliated Hospital of College of MedicineZhejiang University310003 HangzhouZhejiangP.R.China Department of Medical Oncology West China Hospital of Sichuan University610041 ChengduSichuanP.R.China Department of Medical Oncology The Sixth Affiliated Hospital of Sun Yat-sen University510655 GuangzhouGuangdongP.R.China

Background:Fluoropyrimidine and oxaliplatin are widely used for patients with colorectal *** phase II study was conducted to evaluate the efficacy and safety of the combination of S-1.oxaliplatin,and leucovorin(SOL) in the treatment of Chinese patients with metastatic colorectal cancer(mCRC).Methods:Eligible patients with untreated mCRC from four hospitals in China received intravenous oxaliplatin(85 mg/m2) on day 1.oral S-1.twice daily(80-1.0 mg per day) on day 1.7,and leucovorin twice daily(50 mg per day)simultaneously with S-1.every 2 *** and discussion:Forty patients were enrolled in our *** total,296 cycles of SOL were *** overall response rate was 50.0%.At a median follow-up of 27 months,progression-free survival and overall surviva were 7.0 months(95%confidence interval[CI]6.0-1..6 months) and 22.2 months(95%CI 1..1.29.3 months),*** most common grade 3/4 non-hematological adverse events were diarrhea(n = 8,20.0%),nausea(n = 3,7.5%),and vomiting(n = 3,7.5%).The most common grade 3/4 hematological toxicities were thrombocytopenia(n = 3,7.5%),neutropenia(n = 1.2.5%),and abnormal alanine transaminase/aspartate transaminase levels(n = 1.2.5%).There was one treatment-related ***:The data indicate that the SOL regimen is effective and moderately tolerated in Chinese patients with *** registration:Clinical trial

关键词： Colorectal cancer, Oxaliplatin, S-1. Leucovorin

两种含有十二元环的层状稀土硫酸盐的合成、结构表征及性质研究（英文）

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无机化学学报 2013年第12期29卷 2623-2630页

作者：吕赟张登范新蓉万洪祥许岩南京工业大学化学化工学院材料化学工程国家重点实验室南京210009 南京工业大学图书馆南京210009

通过溶剂热合成技术,我们得到了两种新的二维层状稀土硫酸盐:[Tb2(SO4)5][(CH3)2NH2]4(1.和[Y2(SO4)5][(CH3)2NH2]4(2),并通过X-射线衍射、元素分析及红外、热重对化合物进行了表征。两种化合物都属于三斜晶系,P1.间群。其中化合物1.a=... 详细信息

通过溶剂热合成技术,我们得到了两种新的二维层状稀土硫酸盐:[Tb2(SO4)5][(CH3)2NH2]4(1.和[Y2(SO4)5][(CH3)2NH2]4(2),并通过X-射线衍射、元素分析及红外、热重对化合物进行了表征。两种化合物都属于三斜晶系,P1.间群。其中化合物1.a=0.988 7(3)nm,b=1.1.6 1.3)nm,c=1.535 4(4)nm,α=70.45(4)°,β=75.1.(3)°,γ=67.1.(3)°,Z=2;化合物2:a=0.981.6(5)nm,b=1.1.0 1.5)nm,c=1.528 6(8)nm,α=70.44(6)°,β=75.45(6)°,γ=67.48(6)°,Z=2。通过对晶体结构进行表征我们发现两种化合物都含有二维层状无机骨架结构,该层由2种不同类型的双链和十二元环构成。我们还对化合物1.荧光性质进行了研究,其在369 nm的激发波长下表现出了Tb3+的特征发射。

关键词：溶剂热合成方法稀土硫酸盐晶体结构荧光