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Hole-pinned defect-dipoles induced colossal permittivity in Bi doped SrTiO3 ceramics with Sr deficiency

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journal of Materials Science & Technology 2020年第9期44卷 54-61页

作者： Yulong Qiao Weili Li yulei Zhang Lu jing Chang Gao Wenping Cao Dan Xu Weidong Fei School of Materials Science and Engineering Harbin Institute of TechnologyHarbin150001China National Key Laboratory of Science and Technology on Precision Heat Processing of Metals Harbin Institute of TechnologyHarbin150001China School of Light Industry Harbin University of CommerceHarbin150028China Key Laboratory of Quantum Manipulation&Control of Heilongjiang Province Harbin University of Science and TechnologyHarbin150080China State Key Laboratory of Advanced Welding and joining Harbin Institute of TechnologyHarbin150001China

Bi doped SrTiO3 ceramics with Sr deficiency,***1-1.5xBixTiO3(x=0,0.01,0.05,0.1),were prepared via conventional solid-state reaction route.A colossal permittivity(CP)over 104 with low dielectric loss less than 0.05wasobtained in x=0.05 Sr1-1.5xBixTiO3 *** addition,the dielectric constant is maintained at a value greater than 104 in the range of 102-105 Hz and almost frequency *** structure analysis and density functional theory calculations suggest that the Bi·Sr-V"Sr-Bi·Sr defect complex with hole-pinned defect-dipoles maybe responsible for the high-performance CP *** work gives a new way to achieve high performance CP materials in ABO3 perovskite ceramics.

关键词： Bi doped SrTiO3 Sr deficiency Colossal permittivity Low dielectric loss

Editorial: Special issue on blockchain and communication networks

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Digital Communications and Networks 2020年第2期6卷 145-146页

作者： yulei Wu Weizhi Meng Zheng Yan Vijay Varadharajan University of Exeter UK Technical University of Denmark Denmark Xidian University China and Aalto UniversityFinland The University of Newcastle Australia

*** With the boom of new technologies and applications,e.g.,Internet of Things,big data,and artificial intelligence,a deluge of devices are being connected to the network,thus generating a large amount of data[1].Data collection,processing and analysis are essentials to help people gain valuable information,make sensible decisions,and also make devices *** underlying communication network is thus facing unprecedented *** with the increase in devices,managing these devices in the existing centralized model will bring significant challenges to the infrastructure construction,maintenance,and management of the communication *** addition,the current technology/protocol in communication networks cannot adequately ensure the security and privacy of user data,and the use of collected data is beyond the control of the *** users and companies,therefore,are concerned for the privacy of their data,unwilling to provide valuable data for processing and analysis.

关键词： communication networks companies

Online pharmaceutical process analysis of Chinese medicine using a miniature mass spectrometer: Extraction of active ingredients as an example

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journal of Pharmaceutical Analysis 2023年第5期13卷 535-543页

作者： Wangmin Hu junling Hou Wenjing Liu Xuan Gu yulei Yang Hongcai Shang Mei Zhang School of Chinese Materia Medica Beijing University of Chinese MedicineBeijing102488China Key Laboratory of Chinese Internal Medicine of Ministry of Education and Beijing Dongzhimen HospitalBeijing University of Chinese MedicineBeijing100700China Huayi Pharmaceutical Co. Ltd.Beijing102600China

The automation of traditional Chinese medicine(TCM)pharmaceuticals has driven the development of process analysis from offline to *** of common online process analytical technologies are based on spectroscopy,making the identification and quantification of specific ingredients still a ***,we developed a quality control(QC)system for monitoring TCM pharmaceuticals based on paper spray ionization miniature mass spectrometry(mini-MS).It enabled real-time online qualitative and quantitative detection of target ingredients in herbal extracts using mini-MS without chromatographic separation for the first *** changes of alkaloids in Aconiti Lateralis Radix Praeparata(Fuzi)during decoction were used as examples,and the scientific principle of Fuzi compatibility was also ***,the system was verified to work stably at the hourly level for pilot-scale *** mini-MS based online analytical system is expected to be further developed for QC applications in a wider range of pharmaceutical processes.

关键词： Process analytical technology TCM Pharmaceuticals Miniature mass spectrometry Online analysis

Unsaturated fatty acids in natural edible resources, a systematic review of classification, resources, biosynthesis, biological activities and application

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FOOD BIOSCIENCE 2023年第3期53卷 285-294页

作者： Liu, Yao Shen, Na Xin, Huawei Yu, Lili Xu, Qing Cui, yulei Linyi Univ Sch Med Linyi 276000 Shandong Peoples R China

Unsaturated fatty acids are widely distributed in natural edible resources, and have various uses and biological activities. However, no relevant review on unsaturated fat acids from natural edible resources has been found. Therefore, this paper reviewed unsaturated fatty acids in natural edible resources, including the classification and resources of unsaturated fatty acids, biosynthetic pathway, biological activities and application. It was found that unsaturated fatty acids have good therapeutic value in preventing oxidative stress, inflammation, cardiovascular and cerebrovascular diseases, cancer and osteoporosis. This paper will provide reference for the study of unsaturated fatty acids in natural edible resources.

关键词： Unsaturated fatty acids Natural edible resources Biosynthesis Bioactivity Application

Radiolytic decomposition of 4-bromodiphenyl ether

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Nuclear Science and Techniques 2010年第2期21卷 72-75页

作者： TANG Liang XU Gang WU Wenjing SHI Wenyan LIU Ning BAI yulei WU Minghong Shanghai Applied Radiation Institute Shanghai University Shanghai 200444 China

Polybrominated diphenyl ethers (PBDEs) spread widely in the environment are mainly removed by photochemical and anaerobic microbial degradation. In this paper, the decomposition of 4-bromodiphenyl ether (BDE -3), the PBDEs homologues, is investigated by electron beam irradiation of its ethanol/water solution (reduction system) and acetonitrile/water solution (oxidation system). The radiolytic products were determined by GC coupled with electron capture detector, and the reaction rate constant of esol– in the reduction system was measured at 2.7×1010 L·mol–1·s–1 by pulsed radiolysis. The results show that the BDE-3 concentration affects strongly the decomposition ratio in the alkali solution, and the reduction system has a higher BDE-3 decomposition rate than the oxidation system. This indicates that the BDE-3 was reduced by effectively capturing esol– in radiolytic process.

关键词：多溴二苯醚分解率电子捕获检测器 PBDEs 厌氧微生物降解还原系统四溴乙醇/水

Topological Configuration and Rotation Analysis of the Three⁃Order Rubik􀆳s Cube

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journal of Harbin Institute of Technology(New Series) 2020年第5期27卷 49-58页

作者： yulei Hou Ting Zhou Guoxing Zhang Ming Li Daxing Zeng School of Mechanical Engineering Yanshan UniversityQinhuangdao 066004HebeiChina Heavy-duty Intelligent Manufacturing Equipment Innovation Center of Hebei Province Yanshan UniversityQinhuangdao 066004HebeiChina

The mechanism of three⁃order Rubik􀆳s Cube(RC)has the characteristics of recombination and variable degree of freedom,and it is difficult to accurately describe the degree of its *** paper takes RC as the research object,and the adjacency matrix is constructed based on topology and graph theory in order to describe the variation rule of topological configuration in the single layer rotation of *** this paper,the degree of freedom of the RC in any shape can be described by defining the concept of entanglement degree of freedom,establishing a set of adjacency matrix,and determining the degree of freedom of the RC which is attributed to the number of non⁃zero elements in the set of adjacent *** prime number is proposed to describe the rotation of the RC combined with the rotation recognition of RC,which is simple and convenient for computer *** research contents in this paper are beneficial to the study of RC from the perspective of mechanism ***,it is of great significance to the study of other complex mechanisms with variable degrees of freedom.

关键词： mechanism of Rubik􀆳s Cube topological configuration adjacency matrix degree of freedom prime number

Dynamic and adaptive membrane lipid remodeling in leaves of sorghum under salt stress

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The Crop journal 2022年第6期10卷 1557-1569页

作者： Shengnan Ge Debin Liu Min Chu Xinyu Liu yulei Wei Xinyang Che Lei Zhu Lin He jingyu Xu Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement of Heilongjiang Province/Key Laboratory of Low Carbon Green Agriculture in Northeast Plain Ministry of Agriculture and Rural AffairsChina/Research Center of Saline and Alkali Land Improvement Engineering Technology in Heilongjiang Province/College of AgricultureHeilongjiang Bayi Agricultural UniversityDaqing 163319HeilongjiangChina National Coarse Cereal Engineering Research Center Daqing 163319HeilongjiangChina

Salt stress limits plant growth and *** this study,changes in membrane lipids were investigated in leaves of sorghum seedlings subjected to salt stress(150 mmol L^(-1)NaCl).Galactolipids(DGDG and MGDG)accounted for more than 65%of the total glycerolipids in sorghum *** predominance of C36 molecular species in MGDG suggested that sorghum is an 18:3 *** Na Cl treatment,the content of major phospholipids(PC and PE)increased,accompanied by the activation of their metabolism pathways at the transcriptional *** contrast,the proportion of MGDG and PG dropped drastically,leading to a decreased ratio of plastidic to non-plastidic *** adjustment of glycerolipid pathway between the cytosolic and plastidic compartments was triggered by salt stress,as reflected by the increased conversion of PC to PA,providing precursors for galactolipid *** elevated DGDG resulted in increased DGDG/MGDG and bilayer/non-bilayer lipid *** double-bond index of PC,PE,and DGDG increased markedly,evidently owing to the increased expression of FAD3 and *** findings will be helpful for understanding dynamic membrane lipid changes and adaptive lipid remodeling in sorghum response to salt stress.

关键词： Sorghum(Sorghum bicolor L.Moench) Membrane lipid remodeling Lipidome Transcriptome Salt stress

Mullite Oxidation Resistant Coating for SiC-coated Carbon/Carbon Composites by Supersonic Plasma Spraying

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journal of Materials Science & Technology 2013年第1期29卷 29-33页

作者： Chao Ma Hejun Li Heng Wu Qiangang Fu Can Sun Xiaohong Shi yulei Zhang Zhengzhong Zhang jun Tao Zhihai Han State Key Laboratory of Solidification Processing Northwestern Polytechnical University State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University

To improve the oxidation resistance of carbon/carbon （C/C） composites, mullite coating was prepared on the surface of SiC-coated C/C composites by supersonic plasma spraying. Phases and microstructures of mullite coating were characterized by X-ray diffraction （XRD） and scanning electron microscopy （SEM）. The coating primarily consists of a single phase of mullite （3AI203-2SIO2）. The SEM results show that mullite coating was continuous and well bonded with the SiC inner layer without penetrating crack. Mullite coating exhibited good oxidation resistance, After 98.5 h oxidation at 1773 K and 9 thermal shock cycles between 1773 K and room temperature, the weight loss of the coated C/C composites was only 2.57%.

关键词： Mullite coating Supersonic plasma spraying Carbon/carbon composites Oxidation

Presence of circulating tumor cells is associated with metabolic-related variables in postoperative patients with early-stage breast cancer

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Chinese journal of Cancer Research 2018年第3期30卷 340-350页

作者： Yumei Shi Guochun Zhang yulei Wang Chongyang Ren Lingzhu Wen Wenzhen Zhu Xiaoqing Chen Ning Liao The Second School of Clinical Medicine Southern Medical University Department of Breast Cancer Cancer CenterGuangdong General Hospital and Guangdong Academy of Medical Sciences

Objective：Although circulating tumor cells（CTCs）have been well-established as promising prognostic biomarkers in both early breast cancer and metastatic settings,little is known regarding the prognostic relevance of CTCs in the long-term postoperative monitoring of patients with non-metastatic breast cancer（non-MBC）.In this study,we investigated the associations of CTCs with clinicopathological features and metabolic-related variables,such as obesity and ***：In this retrospective study,we recruited 264 patients with postoperative stage Ⅰ–Ⅲ breast cancer at Guangdong General Hospital from january 2009 to December *** prevalence and number of CTCs were assessed using the Cell Search System at a median time of 19.0 months[interquartile range（IQR）,7.8–33.0]after *** CTC assay results were correlated with the clinicopathological features and metabolic-related variables.A multivariate logistic regression analysis was performed to further determine the independent predictors of ***：CTCs were detected in 10.6%of all *** positive rate of CTCs in patients with infiltrating ductal carcinoma was lower than that in patients with other pathological types（9.0%vs.28.6%,P=0.020）.More importantly,the presence of CTCs was correlated with blood glucose level（P=0.015）and high-density lipoprotein level（P=0.030）.The multivariate logistic regression analysis showed that the pathological type[odds ratio（OR）：1.757,95%CI：1.021–3.023;P=0.042]and blood glucose level（OR：1.218,95%CI：1.014–1.465;P=0.035）were independent predictors of the presence of ***：This study revealed potential associations between CTCs and metabolic-related factors in Chinese patients with non-MBC and supports the hypothesis that metabolic dysfunction in breast cancer patients might influence the biological activity of metastatic breast cancer,leading to a higher prevalence of CTCs.

关键词： Breast cancer circulating tumor ceils hyperglycemia metabolic-related variables