检索结果-南通市图书馆

脓毒症患者血清HMGB1、sTLT-1、NLR变化及其对并发急性肺损伤的预测价值

在线全文

学校读者我要写书评

暂无评论

海南医学 2024年第12期35卷 1736-1739页

作者：张建新马尚超宋浩殷飞崔俊伟新乡医学院第一附属医院重症医学科河南卫辉453100 新乡医学院第一附属医院结核内科河南卫辉453100

目的探讨脓毒症患者血清高迁移率族蛋白B1(HMGB1)、可溶性髓样细胞触发受体样转录因子-1(sTLT-1)、中性粒细胞/淋巴细胞比值(NLR)变化及其对并发急性肺损伤(ALI)的预测价值。方法回顾性分析2022年1月至2023年12月新乡医学院第一附属医... 详细信息

目的探讨脓毒症患者血清高迁移率族蛋白B1(HMGB1)、可溶性髓样细胞触发受体样转录因子-1(sTLT-1)、中性粒细胞/淋巴细胞比值(NLR)变化及其对并发急性肺损伤(ALI)的预测价值。方法回顾性分析2022年1月至2023年12月新乡医学院第一附属医院收治的120例脓毒症患者的临床资料,根据住院期间是否发生ALI分为ALI组35例、非ALI组85例。比较ALI组与非ALI组、ALI组不同病情程度患者血清HMGB1、sTLT-1、NLR水平,并采用受试者工作(ROC)曲线分析血清HMGB1、sTLT-1、NLR对脓毒症并发ALI的预测价值。结果ALI组患者的血清HMGB1、sTLT-1、NLR水平分别为(74.21±11.70)pg/mL、(593.06±82.45)pg/mL、5.13±1.16,明显高于非ALI组的(60.15±7.95)pg/mL、(525.73±54.84)pg/mL、4.08±0.64,差异均有统计学意义(P<0.05);ALI组中,高危组患者的血清HMGB1、sTLT-1、NLR水平分别为(86.43±5.90)pg/mL、(686.31±23.91)pg/mL、(6.49±1.11),明显高于中危组的(76.64±11.44)pg/mL、(599.28±88.40)pg/mL、5.27±1.00及低危组的(64.48±5.06)pg/mL、(539.93±35.90)pg/mL、4.27±0.71,且中危组患者均高于低危组,差异均有统计学意义(P<0.05);血清HMGB1、sTLT-1、NLR联合预测脓毒症并发ALI的曲线下面积(AUC)、敏感度、特异度分别为0.890、90.60%、92.10%,HMGB1单独检测分别为0.848、84.70%、77.10%,sTLT-1单独检测分别为0.732、71.40%、68.20%,NLR单独检测分别为0.785、62.90%、84.20%,联合检测高于各指标单独检测(P<0.05)。结论脓毒症并发ALI患者血清HMGB1、sTLT-1、NLR明显升高,且三者联合检测对并发ALI有较高的预测价值。

关键词：脓毒症急性肺损伤高迁移率族蛋白B1 可溶性髓样细胞触发受体样转录因子-1 中性粒细胞/淋巴细胞比值预测价值

Reactive Plasma Sprayed TiN Coating and Its Thermal Stability

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2007年第5期14卷 71-75页

作者： ZOU Dong-li YAN Dian-ran HE Ji-ning LI Xiang-zhi DONG Yan-chun zhang jian-xin School of Materials Hebei University of Technology Tianjin 300132 China School of Materials Science andEngineering Harbin Institute of Technology Harbin 150001 Heilongjiang China

TiN coating was prepared by reactive plasma spraying in the Ar and N2 containing plasma jet. The resuits of XRD show that the TiN coating consists of TiN and Ti3 O, neither Ti2 N nor TiO2 phases. The toughening mechanism was characterized by analyzing the SEM morphologies of the TiN coating＇s indentation of microhardness and fracture surfaces. The results indicate that the coating possesses a high toughness. The adhesion strength among the TiN layers is 25.88 MPa, which is slightly lower than that of the Ni/AI bonding coating. The oxidation process of the RPS TiN coating is TiN→Ti3 O→TiO2.

关键词： plasma spraying reactive plasma spraying TiN coating

Water modeling on fluid flow and mixing phenomena in a BOF steelmaking converter

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2024年第3期31卷 595-607页

作者： xin-yu Cai Hao-jian Duan Ding-han Li Anjun Xu Li-feng zhang School of Metallurgical and Ecological Engineering University of Science and Technology Beijing(USTB)Beijing 100083China School of Mechanical and Materials Engineering North China University of TechnologyBeijing 100144China

A 1∶8 physical water model was constructed to investigate the fluid flow and mixing phenomena in the basic oxygen furnace(BOF)*** particle image velocimetry was employed to measure the velocity distribution of the bath and the high-speed camera was applied to capture the cavity shape in the combined blowing BOF *** mixing time for varied operating conditions was measured by the stimulus-response *** cavity depth increased with the decrease in the lance height and the increase in the top gas flow rate while the bottom blowing gas had little influence on the cavity *** minimum cavity depth was obtained under the condition of a 69.8 m^(3)/h top gas flow rate,a 287.5 mm lance height and a 0.93 m^(3)/h bottom blowing gas flow rate,which was 161.2 *** mixing time decreased as the lance height decreased and the top blowing gas flow rate *** mixing time was first decreased and then increased with the increase in the bottom gas flow *** the condition of 69.8 m^(3)/h gas flow rate of top blowing,the 287.5 mm lance height and the 0.93 m^(3)/h gas flow rate of bottom blowing,the mixing time in the converter was 48.65 *** empirical formula between the stirring power and the mixing time in the converter was calculated.

关键词： Water model Fluid flow Particle image velocimetry Mixing time BOF converter

Metagenomic analysis revealing the metabolic role of microbial communities in the free amino acid biosynthesis of Monascus rice vinegar during fermentation

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

Food Science and Human Wellness 2024年第4期13卷 2317-2326页

作者： Hang Gao jian zhang Li Liu Lijun Fu Yan Zhao Germán Mazza xin zhang Beijing Academy of Food Sciences 100068 BeijingChina Institute for Research and Development in Process Engineering Biotechnology and Alternative Energies(PROBIENCONICET-UNCo)8300 NeuquénArgentina

Free amino acid(FAA)is the important component of vinegar that infl uences quality perception and consumer *** is one of the major metabolites produced by microorganisms;however,the microbial metabolic network on FAA biosynthesis remains *** metagenomic analysis,this work aimed to elucidate the roles of microbes in FAA biosynthesis during Monascus rice vinegar *** profiles from functional analyses showed 14 dominant genera with high contributions to the metabolism *** metabolic network for FAA biosynthesis was then constructed,and the microbial distribution in different metabolic pathways was *** results revealed that 5 functional genera were closely involved in FAA *** study illuminated the metabolic roles of microorganisms in FAA biosynthesis and provided crucial insights into the functional attributes of microbiota in vinegar fermentation.

关键词： Monascus rice vinegar Metagenomic analysis Free amino acid synthesis Metabolic pathway Microbial distribution

Solid superacid catalysts promote high-performance carbon dots with narrow-band fluorescence emission for luminescence solar concentrators

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第8期35卷 437-442页

作者： Rui Cheng xin Huang Tingting zhang Jiazhuang Guo jian Yu Su Chen State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 210009China jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials Nanjing 210009China

Facile and efficient method for constructing carbon dots(CDs)with narrow full width at half maximum(FWHM)is a major challenge in the field,and researches on regulating the FWHM of CDs are also rare and *** this work,we delved into the synthesis of CDs with narrow fluorescence emission FWHM(NFEF-CDs)in the m-phenylenediamine(m-PD)/ethanol system,utilizing solid superacid resin as cata-lyst with solvothermal *** resulting NFEF-CDs exhibit a photoluminescent(PL)emission peak at 521 nm with a narrow FWHM of 41 nm,an absolute PL quantum yield(QY)of 80%,and display excitation-independent PL *** comprehensive characterization,we identified the protonation of edge amino on NFEF-CDs as the key factor in achieving the narrow ***,we validated the broad applicability of solid superacid resins as catalysts for synthesizing CDs with narrow FWHM in the m-PD/ethanol ***,we utilized a self-leveling method to prepare NFEF-CDs film on the surface of poly(methyl methacrylate)(PMMA)substrate and investigated the solid-state fluorescence properties of NFEF-CDs as well as their performance as luminescence solar concentrator(LSC)for photovoltaic *** results revealed that the as-prepared LSC exhibit an internal quantum efficiency(η_(int))of 42.39%and an optical efficiency(η_(opt))of 0.68%.These findings demonstrate the promising prospects of NFEF-CDs in the field of LSCs and provide a theoretical basis for their application in photovoltaic conversion.

关键词： Carbon dots Narrow full width at half maximum Solid-state fluorescence Luminescence solar concentrators Photovoltaic conversion

Rock physical characteristics of deep dolomite under complex geological conditions: A case study of 4th Member of Sinian Dengying Formation in the Sichuan Basin, China

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2024年第4期21卷 2370-2382页

作者： Chuang Li Shu-xin Pan Hong-Bin Wang Ji-xin Deng jian-Guo Zhao Zhi Li Yu zhang Northwest Branch of Research Institute of Petroleum Exploration & Development Department of Geophysics and Exploration College of Geophysics Chengdu University of Technology State Key Laboratory of Petroleum Resources and Engineering China University of Petroleum (Beijing)

The deep-ultra deep carbonate reservoir in China, commonly subjected to modification of multi-stage diagenesis, has extremely high heterogeneity. Conventional rock physics analysis cannot accurately identify the elastic responses of reservoir. Here, the rock physics properties of the dolomite from the 4th Member of the Sinian Dengying Formation are experimentally measured, and the change law of rock physics characteristics is investigated within the framework of the diagenetic processes by the analysis of the elastic and petrologic characteristics, pore structure, and sedimentary environments. The results show that the differentiated diagenesis results in different pore structure characteristics and microtexture characteristics of the rock. The microbial dolomite of the algal mound-grain beach facies is subjected to the contemporaneous microbial dolomitization and seepage-reflux dolomitization, penecontemporaneous selective dissolution, burial dolomitization, and hydrothermal dolomitization. The resultant crystalline dolomite is found with one main type of the dolomite crystal contact boundaries,and the dissolution pore is extensive development. The siliceous, muddy, and limy dolomite of the interbeach sea environment mainly experiences the weak capillary concentration dolomitization, intensive mechanical compaction-induced densification, and burial dolomitization. Such crystalline dolomite is observed with four types of contact boundaries, namely the dolomite contact, clay contact, quartz contact, and calcite contact boundaries, and porosity mostly attributed to residual primary inter-granular or crystalline pores. The samples with the same crystal boundary condition have consistent correlations between the compressional-and shear-wave velocities, and between the compressional-wave velocity and the velocity ratio. Additionally, the variation of the acoustic velocity with effective pressure and the intensity of pore-scale fluid-related dispersion are controlled by t

关键词： Deep-ultra deep carbonate reservoirs Rock physics properties Dolomite Seismic elastic properties Micro-crack Pore structure types

Effects of Conservation Tillage on Crop Yield: a Case Study in the Part of Typical Ecological Zones in China

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Agricultural Sciences in China 2011年第6期10卷 860-866页

作者： TANG Qiu-xiang LI Shao-kun XIE Rui-zhi zhang jian-xin REN Tian-zhi LIN Tao GAO Shi-ju Institute of Crop Science Chinese Academy of Agricultural Sciences Beijing 100081 P.R.China Institute of Agricultural Resources and Regionalization Chinese Academy of Agricultural Sciences Beijing 100081 P.R.China xinjiang University of Agriculture Urumqi 830052 P.R. China xinjiang Academy of Agricultural Sciences Urumqi 830043 P.R. China

To evaluate the effects of different conservation tillage modes on crop yield in various ecological regions, we interviewed peasant households in the Northeast China Plain, North China Plain, Chengdu Plain, and Northwest China Oasis, China, to analyze the influencing factors of the tillage methods on crop yield. An index set was determined from seven yield parameters based on expert consultation and relevant literature. A comprehensive evaluation of conservation tillage methods in the various ecological regions was carried out using fuzzy theory. The approaches with the highest scores were identified for each region： wide and narrow rotation planting with high stubble standing retention in the Northeast China Plain; seeding after rotary tilled of wheat under corn straw mulching and no-tillage seeding of corn and other crops under wheat straw mulching in the North China Plain; no tillage with high stubble retention in the Northwest China Oasis; and no-tillage seeding of wheat and other crops under rice straw mulching in Chengdu Plain. These research data provide a useful guide for the selection of conservation tillage methods for optimum yields in different regions of China.

关键词： conservation tillage mode farmer recognition yield effect fuzzy mathematics

Highly dispersed MgInCe-mixed metal oxides catalyzed direct carbonylation of glycerol and CO_(2)into glycerol carbonate

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2024年第8期72卷 153-163页

作者： Xufang Chen xin Shu Yanru Zhu jian zhang Zhigang Chai Hongyan Song Zhe An Jing He State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China Quzhou Institute for Innovation in Resource Chemical Engineering Quzhou 324000China

Glycerol carbonate,an important glycerol value-added product,has been widely used as an active intermediate and inert solvent in the synthesis of cosmetics,detergents,chemical intermediates,polymers,and so *** direct carbonylation from glycerol with CO_(2)is considered a promising route,but still tough work due to the thermodynamic stability and the kinetic inertness of CO_(2).In this work,highlyselective direct carbonylation of glycerol and CO_(2)into glycerol carbonate has been achieved over highly dispersed MgInCe-mixed metal oxides(MgInCe-MMO),which were prepared through the topological transformation derived from the MgInCe-layered double hydroxides(MgInCe-LDHs).By precisely modulating the surface basic-acidic properties and the oxygen vacancies,an efficient carbonylation of glycerol with CO_(2)has been achieved with a selectivity of up to>99%to glycerol *** investigation into the synergistic catalysis of base-acid sites and oxygen vacancies has been clarified.

关键词： Catalytic reaction engineering Glycerol carbonate Direct carbonylation from glycerol Carbon dioxide Mixed metal oxides Synergistic catalysis

Aero-Hydro-Elastic-Servo Modeling and Dynamic Response Analysis of A Monopile Offshore Wind Turbine Under Different Operating Scenarios

在线全文

学校读者我要写书评

暂无评论

China Ocean Engineering 2024年第3期38卷 379-393页

作者： XIE Shuang-yi GAO jian LI Yong-ran jianG Shu-xin zhang Cheng-lin HE Jiao College of Mechanical Engineering Chongqing University of TechnologyChongqing 400044China Beijing Institute of Precision Mechatronics and Controls Beijing 100076China College of Mechanical and Vehicle Engineering Chongqing UniversityChongqing 400044China Fishery Machinery and Instrument Research Institute Chinese Academy of Fishery SciencesShanghai 200092China School of Mechanical and Power Engineering Chongqing University of Science&TechnologyChongqing 401331China

This paper constructs a coupled aero-hydro-elastic-servo simulation framework for a monopile offshore wind turbine(OWT).In this framework,a detailed multi-body dynamics model of the monopile OWT including the gearbox,blades,tower and other components(nacelle,hub,bedplate,etc.)has been explicitly *** effects of pile−soil interaction,controller and operational conditions on the turbine dynamic responses are studied systematically in time domain and frequency *** results show that(1)a comprehensive drivetrain model has the capability to provide a more precise representation of the complex dynamic characteristics exhibited by drivetrain components,which can be used as the basis for further study on the dynamic characteristics of the drivetrain.(2)The pile−soil interaction can influence the wind turbine dynamic responses,particularly under the parked condition.(3)The effect of the pile−soil interaction on tower responses is more significant than that on blade responses.(4)The use of the controller can substantially affect the rotor characteristics,which in turn influences the turbine dynamic responses.(5)The tower and blade displacements under the operational condition are much larger than those under the parked *** model and methodology presented in this study demonstrate potential for examining complex dynamic behaviors of the monopile *** ensure accuracy and precision,it is imperative to construct a detailed model of the wind turbine system,while also taking into account simulation efficiency.

关键词： offshore wind turbine(OWT) pile−soil interaction dynamic response parked condition operating condition