检索结果-南通市图书馆

Decomposition characteristics of organic materials and their effects on labile and recalcitrant organic carbon fractions in a semi-arid soil under plastic mulch and drip irrigation

引用

Journal of Arid Land 2018年第1期10卷 115-128页

作者： hu juan wu jinggui qu xiaojing college of resource and environmental science jilin agricultural universityChangchun 130118China

Labile organic carbon （LC） and recalcitrant organic carbon （RC） are two major fractions of soil organic carbon （SOC） and play a critical role in organic carbon turnover and sequestration. The aims of this study were to evaluate the variations of LC and RC in a semi-arid soil （Inner Mongolia, China） under plastic mulch and drip irrigation after the application of organic materials （OMs）, and to explore the effects of OMs from various sources on LC and RC by probing the decomposition characteristics of OMs using in-situ nylon mesh bags burying method. The field experiment included seven treatments, i.e., chicken manure （CM）, sheep manure （SM）, mushroom residue （MR）, maize straw （MS）, fodder grass （FG）, tree leaves （TL） and no OMs as a control （CK）. Soil LC and RC were separated by huygens D＇s method （particle size-density）, and the average soil mass recovery rate and carbon recovery rate were above 95%, which indicated this method was suitable for carbon pools size analysis. The LC and RC contents significantly （P〈0.01） increased after the application of OMs. Moreover, LC and RC contents were 3.2%-8.6% and 5.0%-9.4% higher in 2016 than in 2015. The applications of CM and SM significantly increased （P〈0,01） LC content and LC/SOC ratio, whereas they were the lowest after the application of TL. However, SOC and RC contents were significantly higher （P〈0.01） after the applications of TL and MS. The correlation analysis indicated the decomposition rate of OMs was positively related with LC content and LC/SOC ratio. In addition, lignin, polyphenol, WOM （total water-soluble organic matter）, WHA （water-soluble humic acid）, HSL （humicdike substance） and HAL （humic acid-like） contents in initial OMs played important roles in SOC and RC. In-situ nylon mesh bags burying experiment indicated the decomposition rates of CM, SM and MS were significantly higher than those of MR, FG, and TL. Furthermore, MS could result in more lignin derivatives, WHA, and HAL polymers in shorter time

关键词： organic materials labile organic carbon recalcitrant organic carbon decomposition characteristics plasticmulch drip irrigation Inner Mongolia

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Role of gut microbiota in the pathogenesis and therapeutics of minimal hepatic encephalopathy via the gut-liver-brain axis

引用

World Journal of Gastroenterology 2023年第1期29卷 144-156页

作者： Ming Luo Rui-juan Xin Fang-Rui hu Li Yao Sheng-juan hu Fei-hu Bai Department of Gastroenterology People’s Hospital of Ningxia Hui Autonomous RegionYinchuan 750021Ningxia Hui Autonomous RegionChina

Minimal hepatic encephalopathy(MHE) is a frequent neurological and psychiatric complication of liver cirrhosis. The precise pathogenesis of MHE is complicated and has yet to be fully elucidated. Studies in cirrhotic patients and experimental animals with MHE have indicated that gut microbiota dysbiosis induces systemic inflammation, hyperammonemia, and endotoxemia, subsequently leading to neuroinflammation in the brain via the gut-liver-brain axis. Related mechanisms initiated by gut microbiota dysbiosis have significant roles in MHE pathogenesis. The currently available therapeutic strategies for MHE in clinical practice, including lactulose, rifaximin, probiotics, synbiotics, and fecal microbiota transplantation, exert their effects mainly by modulating gut microbiota dysbiosis. Microbiome therapies for MHE have shown promised efficacy and safety;however, several controversies and challenges regarding their clinical use deserve to be intensively discussed. We have summarized the latest research findings concerning the roles of gut microbiota dysbiosis in the pathogenesis of MHE via the gut-liver-brain axis as well as the potential mechanisms by which microbiome therapies regulate gut microbiota dysbiosis in MHE patients.

关键词： Gut microbiota Minimal hepatic encephalopathy Gut-liver-brain axis Pathogenesis Therapeutics

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Analysis of surface and sub-surface of cold-rolled Al plate lubricated with water-or oil-based lubricants

引用

Science China(Technological Sciences) 2017年第9期60卷 1407-1414页

作者： TANG XiWen ZHANG Chenhui WANG Yan YANG Ye hu juan State Key Laboratory of Tribology Tsinghua University Beijing 100084 China Shenzhen Key Laboratory of Micro-nano Manufacturing Research Institute of Tsinghua University in Shenzhen Shenzhen 518057 China Nanjing Golden Chemical Co. Ltd Nanjing 210019 China

For environmental protection, energy conservation, and other reasons, water-based lubricants are increasingly chosen to replace oil lubricants. Water-based lubricants are divided into emulsified and solution types. Solution type water-based lubricants have attracted significant attention for the good stability, easy biodegradability, and safety for workers. However, some problems exist with current solution type water-based lubricants, such as poor lubricity and corrosion resistance. During the cold-rolling process, A1 plate rolled using oil-based lubricant lubrication shows metallic luster, but that rolled using water-based lubricant shows corrosion spots, black strips, and no metallic luster. Therefore, this study mainly analyzed the reasons for the darkness of A1 plate cold-rolled with water solution lubricants. The differences in plate surfaces lubricated by water solution and oil were investigated by scanning electron microscopy, auger electron spectroscopy, X-ray photoelectron spectroscopy, and transmission electron microscopy. The analysis results showed that the surface of the oil-lubricated sample is smooth, the oxygen content is low, and the oxide layer is thin, while the surface of the water solution-lubricated sample is rough, the oxygen content is high, the chemical composition is more complex, and the oxide layer is not uniform and thick.

关键词： water-based lubricant oil-based lubricant cold-rolled al surface oxidation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Constraining the Spatial Curvature of the Local Universe with Deep Learning

引用

Research in Astronomy and Astrophysics 2023年第12期23卷 153-163页

作者： Liang Liu Li-juan hu Li Tang Ying Wu Department of Math and Physics Mianyang Teachers'CollegeMianyang 621000China Research Center of Computational Physics Mianyang Teachers'CollegeMianyang 621000China

We use the distance sum rule method to constrain the spatial curvature of the Universe with a large sample of 161strong gravitational lensing systems,whose distances are calibrated from the Pantheon compilation of typeⅠa supernovae using deep *** investigate the possible influence of mass model of the lens galaxy on constraining the curvature parameterΩ_(k),we consider three different lens *** show that a flat Universe is supported in the singular isothermal sphere(SIS)model with the parameterΩ_(k)=0.049_(-0.125)^(+0.147).While in the power-law(PL)model,a closed Universe is preferred at the~3σconfidence level,with the parameterΩ_(k)=-0.245_(-0.071)^(+0.075).In the extended PL model,the 95%confidence level upper limit ofΩ_(k)is<*** for the parameters of the lens models,constraints on the three models indicate that the mass profile of the lens galaxy could not be simply described by the standard SIS model.

关键词： (cosmology:)cosmological parameters-(cosmology:)distance scale-(stars:)supernovae general

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Anatomical vs nonanatomical liver resection for solitary hepatocellular carcinoma:A systematic review and meta-analysis

引用

World Journal of Gastrointestinal Oncology 2021年第11期13卷 1833-1846页

作者： hu Liu Feng-juan hu hui Li Tian Lan Hong Wu Department of Liver Surgery Liver Transplantation DivisionLaboratory of Liver SurgeryWest China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina The Center of Gerontology and Geriatrics West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina

BACKGROUND The long-term survival of patients with solitary hepatocellular carcinoma(HCC)following anatomical resection(AR)vs non-anatomical resection(NAR)is still *** is necessary to investigate which approach is better for patients with solitary *** To compare perioperative and long-term survival outcomes of AR and NAR for solitary *** We performed a comprehensive literature search of PubMed,Medline(Ovid),Embase(Ovid),and Cochrane *** of any age and sex,who underwent liver resection,were considered following the following criteria:(1)Studies reporting AR vs NAR liver resection;(2)Studies focused on primary HCC with a solitary tumor;(3)Studies reporting the long-term survival outcomes(>5 years);and(4)Studies including patients without history of preoperative *** main results were overall survival(OS)and disease-free survival(DFS).Perioperative outcomes were also *** A total of 14 studies,published between 2001 and 2020,were included in our meta-analysis,including 9444 patients who were mainly from China,Japan,and *** was performed on 4260(44.8%)*** synthetic results showed that the 5-year OS[odds ratio(OR):1.19;P<0.001]and DFS(OR:1.26;P<0.001)were significantly better in the AR group than in the NAR *** was associated with longer operating time[mean difference(MD):47.08;P<0.001],more blood loss(MD:169.29;P=0.001),and wider surgical margin(MD=1.35;P=0.04)compared to *** was no obvious difference in blood transfusion ratio(OR:1.16;P=0.65)or postoperative complications(OR:1.24,P=0.18).CONCLUSION AR is superior to NAR in terms of long-term ***,AR can be recommended as a reasonable surgical option in patients with solitary HCC.

关键词： Hepatocellular carcinoma Anatomical resection Non-anatomical resection Meta-analysis Systematic review Solitary tumor

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Comparison of the application value of transvaginal ultrasound and transabdominal ultrasound in the diagnosis of ectopic pregnancy

引用

World Journal of Clinical Cases 2023年第13期11卷 2945-2955页

作者： hui-juan hu juan Sun Rui Feng Liang Yu Department of Ultrasonic Hangzhou Red Cross HospitalAffiliated Hangzhou Chest HospitalZhejiang University School of MedicineHangzhou 310003Zhejiang ProvinceChina Department of Ultrasonic Zhejiang Provincial People’s HospitalPeople’s Hospital of Hangzhou Medical CollegeHangzhou 310000Zhejiang ProvinceChina Department of Interventional Medicine Zhejiang Provincial People’s HospitalPeople’s Hospital of Hangzhou Medical CollegeHangzhou 310000Zhejiang ProvinceChina Department of Radiology Zhejiang Provincial People’s HospitalPeople’s Hospital of Hangzhou Medical CollegeHangzhou 310000Zhejiang ProvinceChina

BACKGROUND Ectopic pregnancy(EP) is one of the most common acute abdominal diseases in gynecology. Once the condition of EP is delayed, it may lead to massive hemorrhage, shock, and even death in a short time, seriously threatening the patient’s life. Early diagnosis is the key to preventing and improving the prognosis of *** ultrasound(TAS) and transvaginal ultrasound(TVS) are the main diagnostic methods for abdominal diseases. The purpose of this study is to explore the application value and effect of TAS and TVS in the diagnosis of EP,hoping to provide more valuable references for the diagnosis of *** To explore the application value of TAS and TVS in the diagnosis of EP and to improve the level of clinical *** A total of 140 patients with EP admitted to our hospital from July 2018 to July 2020 were selected for this study. All patients were divided into two groups according to the examination methods. 63 patients who underwent abdominal ultrasound examination were set as the TAS group, while 77 patients who underwent TVS examination were set as the TVS group. We compared the diagnostic accuracy and misdiagnosis rates between the two types of ultrasound examinations, as well as the postoperative pathological results of the two diagnostic methods for different types of ectopic pregnancies. We also analyzed the sonograms for the presence of mixed ectopic masses,adnexal masses, ectopic gestational sacs, the presence or absence of visible embryo and fetal heart in the ectopic sac shadow, and the detection of fluid in the rectal fossa of the uterus, such as the adnexal area, yolk sac, and embryo, etc. In addition, the diagnosis time, days of gestational sac appearance, operation time, endometrial thickness, and blood flow resistance index were compared as *** After performing both types of ultrasound examinations in 140 patients with EP, we found that the diagnostic accuracy of TVS was significantly higher than that of TAS, and

关键词： Transvaginal ultrasound Transabdominal ultrasound Ectopic pregnancy Application value

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Integrable discretization of soliton equations via bilinear method and Backlund transformation

引用

Science China Mathematics 2015年第2期58卷 279-296页

作者： ZHANG Ying Nan CHANG Xiang Ke hu juan hu Xing Biao TAM Hon-Wah Institute of Computational Mathematics and Scientific Engineering Computing Academy of Mathematics and Systems Science Chinese Academy of Sciences School of Mathematical Sciences University of Chinese Academy of Sciences Department of Applied Mathematics Zhejiang University of Technology Department of Computer Science Hong Kong Baptist University

We present a systematic procedure to derive discrete analogues of integrable PDEs via Hirota’s bilinear *** approach is mainly based on the compatibility between an integrable system and its B¨acklund *** apply this procedure to several equations,including the extended Korteweg-deVries(Kd V)equation,the extended Kadomtsev-Petviashvili(KP)equation,the extended Boussinesq equation,the extended Sawada-Kotera(SK)equation and the extended Ito equation,and obtain their associated semidiscrete *** the continuum limit,these differential-difference systems converge to their corresponding smooth *** these new integrable systems,their B¨acklund transformations and Lax pairs are derived.

关键词： integrable discretization bilinear method Backlund transformation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Study of Surfactant-Induced Growth of Ag on Ag (111)

引用

Communications in Theoretical Physics 2008年第12期50卷 1439-1442页

作者： WU Li-Li hu juan-Mei WU Feng-Min College of Mathematics and Physics Information Engineering Zhejiang Normal University Jinhua 321004 China

A new growth model is introduced to describe surfactant-induced growth of Ag on Ag （111） with realistic physical parameters. In this model, the A-S exchange mechanism is considered for the first time. Using the Monte Carlo simulations, the influence of exchange mechanism, surface temperature T, the exchange barrier Eεx, and the coverage of surfactant θM on the growth mode and morphology during multilayer film growth of Ag/Ag （111） are studied in detail Both the referenced value of surfactant coverage and the method to obtain perfect layer-by-layer film in surfactantinduced Ag/Ag （111） system are provided. Our simulation results are consistent with many experimental observations for surfactant-induced growth of Ag on Ag （111）.

关键词： surfactant surface roughness exchange Monte Carlo simulation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Synchrotron FTIR spectroscopy reveals molecular changes in Escherichia coli upon Cu^2＋ exposure

引用

Nuclear Science and Techniques 2016年第3期27卷 45-52页

作者： Xiao-juan hu Zhi-Xiao Liu Ya-Di Wang Xue-Ling Li Jun hu Jun-Hong Lv Division of Physical Biology and CAS Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China Shanghai Center for Bioinformation Technology Shanghai Academy of Science and TechnologyShanghai 201203China Center for Clinical and Translational Medicine Shanghai Industrial Technology InstituteShanghai 201203China

Copper ions(e.g.,Cu^(2+)) have outstanding antibacterial properties,but the exact mechanism is rather complex and not fully *** this work,synchrotron Fourier transform infrared(FTIR) spectroscopy was used as an analytical tool to investigate the CuCl_2-induced biochemical changes in Escherichia *** spectral measurements indicated that this technique is sensitive enough to detect changes in membrane lipids,nucleic acids,peptidoglycans and proteins of Cu^(2+)-treated ***,for short-time treated cells,the effects on phospholipid composition were clearly shown,while no significant alterations of proteins,nucleic acids and peptidoglycans were *** quantitative nano-mechanics mode atomic force microscopy(AFM)confirmed the changes in the topography and mechanical properties of bacteria upon the Cu^(2+) *** study demonstrated that FTIR spectroscopy combined with AFM can provide more comprehensive evaluation on the biochemical and mechanical responses of bacteria to copper.

关键词： CuCl2 红外光谱大肠杆菌同步原子力显微镜 FTIR光谱分子曝光

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Two Sample Test based on U-statistic for Functional Data

引用

Acta Mathematica Sinica,English Series 2023年第3期39卷 533-552页

作者： Wen juan hu Liang WANG Bao Xue ZHANG Guo Chang WANG School of Statistics Capital University of Economics and BusinessBeijing 100070P.R.China School of Mathematics and Statistics Northeast Normal UniversityChangchun 130024P.R.China School of Economics Jinan UniversityGuangzhou 510632P.R.China

We propose a two-sample test for the mean functions of functional data when the number of bases is much lager than the sample *** novel test is based on U-statistics which avoids estimating the covariance operator accurately under the high dimensional *** further prove the asymptotic normality of our test statistic under both null hypothesis and a local alternative *** extensive simulation study is presented which shows that the proposed test works well in comparison with several other methods under the high dimensional *** application to egg-laying trajectories of Mediterranean fruit flies data set demonstrates the applicability of the method.

关键词： Mean test functional data U-statistics two sample

来源：

维普期刊数据库

同方期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：