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Anisotropic Magnetoresistance Effect in Amorphous and Nanocrystalline Fe(Cu,Nb)-Si-B Alloys

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Journal of Materials Science & Technology 2000年第2期16卷 165-166页

作者： Deren li, Zhichao LU, Guoqing li and Ze xianyu (Department of Physics, Northeastern University, Shenyang 110006, China) Department of Physics Northeastern University Shenyang 110006 China National Amorphous and Nanocrystalline Alloy Engineering Research Center Center Iron and Steel Research Institute Beijing 100081 China

The magnetoresistance effect and magnetic properties in amorphous and nanocrystalline Fe(Cu, Nb)-Si-B ribbons have been investigated, it was observed that the anisotropic magnetoresistance (AMR) of nanocrystalline alloy is much smaller than that of amorphous alloy, Indicating that the anisotropy of nanocrystalline alloy becomes smaller after crystallizing, and the smallest AMR is coincident with the excellent soft magnetic characteristics. It is believed that the smaller magnetic crystalline anisotropy is the origin of the excellent soft magnetic characteristics of nanocrystalline alloy.

关键词： Anisotropic Magnetoresistance Effect in Amorphous and Nanocrystalline Fe Cu,Nb Si-B Alloys AMR

A novel method for identification and relative quantification of N-terminal peptides using metal-element-chelated tags coupled with mass spectrometry

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Science China Chemistry 2014年第5期57卷 708-717页

作者： YAN Hui HAO FeiRan CAO QiChen li JiaBin li NanNan TIAN Fang BAI HaiHong REN XiaoJun li xianyu ZHANG YangJun QIAN XiaoHong Anhui Medical University State Key Laboratory of Proteomics Beijing Proteome Research Center Beijing Institute of Radiation Medicine Affiliated Hospital of liaoning University of Traditional Chinese Medicine

By means of the reaction between a DOTA-NHS-ester bifunctional reagent and N-terminal peptides of proteins, and then che- lation of lanthanide metal ions as tags, we established a novel method for the identification of N-terminal peptides of proteins and their relative quantification using metal-element-chelated tags coupled with mass spectrometry. The experimental results indicate that metal elements are able to completely label N-terminal peptides at the protein level. The N-terminal peptides are enriched as the peptides digested with trypsin are selectively eliminated by isothiocyanate-coupled silica beads. We success- fully identified the N-terminal peptides of 158 proteins of Thermoanaerobacter tengcongensis incubated at 55 and 75 ℃, among which N-terminal peptides of 24 proteins are partially acetylated. Moreover, metal-element tags with high molecule weights make it convenient for N-terminal peptides consisting of less than 6 amino acids to be identified; these make up 55 percent of the identified proteins. Finally, we developed a general approach for the relative quantification of proteins based on N-terminal peptides. We adopted lysozyme and ribonuclease B as model proteins; the correlation coefficients （R2） of the standard curves for the quantitative method were 0.9994 and 0.9997, respectively, with each concentration ratio ranging from 0.1 to 10 and both relative standard derivations （RSD） measured at less than 5%. In T. tengcongensis at two incubation tem- peratures, 80 proteins possess quantitative information. In addition, compared with the proteins of T. tengcongensis incubated at 55 ℃, in T. tengcongensis incubated at 75 ℃, 7 proteins upregulate whereas 16 proteins downregulate, and most differential proteins are related to protein synthesis.

关键词： metal-element-chelated tags N-terminal peptides proteomics mass spectrometry

Motor Power Based Inversion of Dynamometer Cards Using Hybrid Model

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Motor Power Based Inversion of Dynamometer Cards Using Hybri...

A Study of Retention Time Gradient Effect of Gradientally Loaded Columns

第32届中国控制与决策会议

作者： Dezhi Hao Xianwen Gao xianyu li School of Information Science and Engineering Northeastern University School of Automation and Electrical Engineering Shenyang Ligong University

The dynamometer card sensors’ poor real-time performance and high maintenance costs limit the control and diagnosis for sucker rod pumps（SRP） in oil exploitation. The motor which is the power source of the whole pumping process can reflect the working state of the entire equipment. The motor power can be accessed easily and ***, this paper proposes a method to measure the dynamometer cards based on the motor power. Firstly, a mathematical function relationship between the polished rod load and the motor power is established by fully considering many crucial factors in this process. Moreover, the data is compensated by the support vector machine for the top and bottom dead centers and the error of the mechanism model. At last, the proposed method is validated by a set of motor power data collected from wells by a self-developed device. The experimental result demonstrates the effectiveness of the proposed method for the inversion.

关键词： Sucker Rod Pump Dynamometer Card Motor Power Hybrid Modeling

来源： cnki会议评论

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Chemical Research in Chinese Universities 1990年第4期6卷 276-280页

作者： Yun Xiqin, Kou Dengmin, li Yanhong and Lu xianyu (Department of Chemistry, Nankai University, Tianjin)

In this work, the 'retention time gradient effect' of gradient GC columns is intensively studied to establish some equations and formulas for structure calculation of chromatographic columns. In addition, the relevant... 详细信息

关键词： GC column Gradientally loaded GC column Retention time Gradient effect

Nervonic acid alleviates stroke and its associated poststroke depression behaviors

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hlife 2024年第11期2卷 592-606页

作者： Fengrong Zhang Yong Fan Nghi Van Phung Boyang Ji Junmiao Chen Xingyue Xu Fuli li Peifeng Ji Hongjun Yang xianyu li Beijing Key Laboratory of Traditional Chinese Medicine Basic Research on Prevention and Treatment for Major Diseases Experimental Research CenterChina Academy of Chinese Medical SciencesBeijingChina Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of SciencesShandongChina BioInnovation Institute BIICopenhagenDenmark SCIEX China BeijingChina State Key Laboratory of Respiratory Disease National Clinical Research Center for Respiratory DiseaseGuangzhou Institute of Respiratory Healththe First Affiliated Hospital of Guangzhou Medical UniversityGuangdongChina Beijing Institutes of life Science Chinese Academy of SciencesBeijingChina

Nervonic acid(NA)is an important long-chain monounsaturated fatty acid found in mammalian nervous *** has recently garnered research attention due to its therapeutic potential in treating psychiatric and neurodegenerative *** this study,we investigated the efficacy of NA in treating ischemia/reperfusion and poststroke events in a rat ***,there was significant reduction in the infarct area,cell death,and neuronal swelling after NA treatment,and the improvement in cerebral blood flow was also observed on day five after middle cerebral artery ***,NA treatment led to the upregulation of brain-derived neurotrophic factors and myelin basic protein *** displayed improved effects on depressive-like behavior of rats by three validated assays—the sucrose preference test,open-field test,and forced swim *** the mechanism of action,direct supplementation of NA in the brain was *** also observed the indirect effects of NA on the gut ***,the NA group gradually restored the bacterial diversity and the EGb group exhibited no impact based on observed-out *** found an increase in the abundance of Blautia and Sutterella,which participated in phenylalanine *** metabolomics of plasma and brain samples revealed a decrease in the levels of phenylalanine-based amino acids,which alleviated the inhibitory effects on glutamine metabolism and promoted the recovery and signaling transmission of neurons after ***,our findings suggest that NA can be a viable treatment option for alleviating stroke and its associated poststroke depressive-like behaviors.

关键词： nervonic acid poststroke depressive-like behaviors gut microbiota

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高性能混凝土中的矿物质超细粉

工业建筑 2007年第z1期37卷 1023-1026页

作者：李显宇张勇北京交通大学土木建筑工程学院北京100082

论述高性能混凝土中的矿物质超细粉的基本特性及其对HPC的作用,给出超微粉在高性能混凝土中的应用实例,并提出超微粉在高性能混凝土中的主要发展方向。

关键词：高性能混凝土超微粉施工性能力学性能发展方向

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放射性龋的发病机制及诊疗要点

中华口腔医学杂志 2024年第1期59卷 30-36页

作者：李贤玉陈文霞广西医科大学口腔医学院·附属口腔医院牙体牙髓科、广西壮族自治区卫生健康委员会口腔感染性疾病防治重点实验室南宁530021

放射性龋是头颈部肿瘤放疗后的常见并发症,是放疗后发生的一种快速进展性牙体硬组织疾病,严重影响放疗后患者的生活质量。本文阐述了放射性龋的致病机制、诊断及龋坏评价、治疗以及预防策略的研究进展,以期为放射性龋的临床防治提供参考。

关键词：龋齿放射性龋放射治疗诊断修复材料预防

果汁护色剂JPX对苹果汁中棒曲霉素的降解作用及护色效果

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农业工程学报 2006年第10期22卷 237-239页

作者：师俊玲张小平李元瑞李先玉西北农林科技大学食品学院杨凌712100

为了考察果汁护色剂JPX在护色同时对苹果汁中棒曲霉素的降解作用与条件,该文研究处理温度、添加剂用量及处理时间对棒曲霉素降解率和果汁色值的影响.结果表明：在苹果浓缩汁生产过程中,用JPX控制棒曲霉素的较佳方法是,在榨汁阶段加入0.8... 详细信息

为了考察果汁护色剂JPX在护色同时对苹果汁中棒曲霉素的降解作用与条件,该文研究处理温度、添加剂用量及处理时间对棒曲霉素降解率和果汁色值的影响.结果表明：在苹果浓缩汁生产过程中,用JPX控制棒曲霉素的较佳方法是,在榨汁阶段加入0.8 g/L,酶解阶段加入1.6 g/L,棒曲霉素的降解率可以达到70%～80%,且对果汁有很好的护色效果.

关键词：棒曲霉素降解 B族维生素苹果汁护色

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论英语教学与审美能力的培养

外语教学 2004年第4期25卷 70-73页

作者：杨贤玉李悦浙江财经学院外国语学院浙江杭州310012

审美能力的培养是素质教育的一个重要方面。高校开展审美教育 ,首先必须注重培养学生对美好事物的审美感受能力和鉴赏能力 ,其中包括对审美对象的形式、内容、思想寓意等的理解能力、鉴别能力和整体评价能力 ,进而发展审美创造能力。在... 详细信息

审美能力的培养是素质教育的一个重要方面。高校开展审美教育 ,首先必须注重培养学生对美好事物的审美感受能力和鉴赏能力 ,其中包括对审美对象的形式、内容、思想寓意等的理解能力、鉴别能力和整体评价能力 ,进而发展审美创造能力。在高校英语教学中 ,将课堂教学与审美教育有机地结合起来 ,对学生的文化素质和思想修养等方面的提高有着不可估量的作用。英语教学应该把美的传播贯穿于整个语言教学过程之中 ,结合英语语言材料中所具有的美的事物 ,培养受教育者正确的审美观点 ,提高其审美能力 ,使受教育者在学习英语语言的同时 ,情感受到真善美的陶冶 ,心灵受到激荡 ,人格得到升华。

关键词：英语教学美审美能力