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介质衬底上生长h-BN二维原子晶体的研究进展

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无机材料学报 2019年第12期34卷 1245-1256页

作者：张兴旺高孟磊孟军华中国科学院半导体研究所半导体材料科学重点实验室北京100083 中国科学院大学材料与光电研究中心北京100049

六方氮化硼(h-BN)二维原子晶体以其独特的结构、优异的性质以及广泛的应用前景引起了人们的普遍关注。高质量h-BN材料的制备是其性质研究与实际应用的前提。机械剥离的h-BN尺寸有限,普遍采用的化学气相沉积(CVD)技术通常以过渡金属为衬... 详细信息

六方氮化硼(h-BN)二维原子晶体以其独特的结构、优异的性质以及广泛的应用前景引起了人们的普遍关注。高质量h-BN材料的制备是其性质研究与实际应用的前提。机械剥离的h-BN尺寸有限,普遍采用的化学气相沉积(CVD)技术通常以过渡金属为衬底,器件应用时需要将h-BN转移到其它衬底上。因此,在介质衬底上直接生长h-BN成为二维材料研究领域的一个重要发展方向。本文总结了近年来介质衬底(包括:Si基衬底、蓝宝石衬底和石英衬底等)上直接生长h-BN二维原子晶体的主要进展。人们采用CVD、金属有机气相外延法(MOVPE)、物理气相沉积法(PVD)等方法,通过提高生长温度、衬底表面处理、两步生长等工艺实现了介质衬底上直接生长h-BN。此外,还介绍了介质衬底上h-BN二维原子晶体的主要应用。

关键词：六方氮化硼二维材料介质衬底直接生长综述

具有同分异构体的磺化聚酰亚胺质子交换膜对全钒液流电池性能影响

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高分子材料科学与工程 2023年第8期39卷 134-141页

作者：刘鑫马磊杨洁刘蕾王超中北大学材料科学与工程学院山西太原030051

由于具有同分异构结构的聚合物在性能方面具有明显的差异,文中以1,4,5,8-萘四甲酸酐(NTDA)为二酐单体,3,3’-二氨基二苯砜和4,4’-二氨基二苯砜提供同分异构结构单元,4,4'-二氨基-2,2'-二磺酸基-联苯水合物(BDSA)为磺化二胺单体,制备了... 详细信息

由于具有同分异构结构的聚合物在性能方面具有明显的差异,文中以1,4,5,8-萘四甲酸酐(NTDA)为二酐单体,3,3’-二氨基二苯砜和4,4’-二氨基二苯砜提供同分异构结构单元,4,4'-二氨基-2,2'-二磺酸基-联苯水合物(BDSA)为磺化二胺单体,制备了2种具有不同空间构型的磺化聚酰亚胺(SPI),并将其作为质子交换膜(PEM)使用在全钒液流电池(VRFB)中。3,3’-二氨基二苯砜的螺旋结构可有效增强3-SPI化学结构的柔性,有助于分子链的缠结,使其具有优异的力学性能、尺寸稳定性和阻钒能力(8.08×10^(-8)cm^(2)/min)。4-SPI构型的离子电导率(47.21 mS/cm)与Nafion 212膜(49.37 mS/cm)相似,但离子选择性(4.25×10^(5)S·min/cm^(3))约是Nafion 212(1.08×10^(5)S·min/cm^(3))的4倍。在单电池测试中,4-SPI仍表现出良好的综合性能,在160 mA/cm^(2)电流密度下,能量效率(EE)达到77%。同时,4-SPI也表现出良好的稳定性,其EE在30次循环之后仍保持在84%以上。

关键词：磺化聚酰亚胺全钒液流电池质子交换膜同分异构体

Effects of resveratrol on cellular pyrolysis of rat brain during ischemia-reperfusion and on NLRP3 inflammatory bodies, Caspase-1 and ZO-1 in microglia

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Journal of Hainan Medical University 2019年第17期25卷 11-14页

作者： Yu-jie Sun Nan-Nan Zhang meng Zhao Department of Neurology Kailuan General Hospital Tangshan 063000 Hebei China

Objective: To study the effects of resveratrol on apoptosis of rat brain during ischemia-reperfusion and on NLRP3 inflammatory bodies, Caspase-1 and ZO-1 in microglia. Methods:According to the random digital table method, forty-five male Sprague-Dawley rats were divided into the sham-operated group (blank control group), cerebral ischemia-reperfusion group (IR control group) and resveratrol treatment group, with 15 rats in each group. After the establishment of cerebral ischemia-reperfusion model by suture method, the effects of different methods on the expression of apoptosis-related molecules (promoters, suppressors) in brain tissue, microglial NLRP3 inflammatory bodies, Caspase-1 and ZO-1 in SD rats were compared. Results: The content of apoptosis-related molecules (CytC, AIF, Caspase-8, Caspase-9, Fas, FasL) in the sham-operated group was significantly lower than that in IR control group and resveratrol group, and the content in IR control group was significantly higher than that in resveratrol group (P<0.05). The content of anti-apoptosis-related molecules (Livin, Survivin, XIAP) in sham-operated group was significantly higher than that in IR control group and resveratrol group, while the content of pro-apoptosis-related molecules in IR control group was significantly lower than that in resveratrol group (P<0. 05). The levels of IL-10, IL-6,TNF-α of brain tissue in resveratrol group were significantly higher than those in the control group and significantly lower than those in IR group (P<0. 05). The content of NLRP3 inflammatory body in microglia was the lowest in the sham-operated group, followed by resveratrol group, IR control group. ZO-1 content was the highest in the sham-operated group, followed by resveratrol group and IR control group. Conclusion: Resveratrol can effectively inhibit cellular pyrolysis, increase the level of NLRP3 inflammatory body and Caspase-1 and decrease the level of ZO-1 in rat brain tissue during ischemia-reperfusion, so as to pla

关键词： Ischemia reperfusion Cellular pyrolysis Microglia Resveratrol

Pulmonary immune cells and inflammatory cytokine dysregulation are associated with mortality of IL-1R1^(-/-) mice infected with influenza virus(H1N1)

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Zoological Research 2017年第3期38卷 146-154页

作者： lei Guo Yan-Cui Wang Jun-jie Mei Ruo-Tong Ning Jing-Jing Wang Jia-Qi Li Xi Wang Hui-Wen Zheng Hai-Tao Fan Long-Ding Liu Department of Viral Immunology Institute of Medical Biology Chinese Academy of Medical Science and Peking Union Medical College Division of Neonatology Department of Pediatrics Children's Hospital of Philadelphia Perelman School of Medicine University of Pennsylvania

Respirovirus infection can cause viral pneumonia and acute lung injury （ALl）. The interleukin-1 （IL-1） family consists of proinflammatory cytokines that play essential roles in regulating immune and inflammatory responses in vivo. IL-1 signaling is associated with protection against respiratory influenza virus infection by mediation of the pulmonary anti-viral immune response and inflammation. We analyzed the infiltration lung immune leukocytes and cytokines that contribute to inflammatory lung pathology and mortality of fatal H1N1 virus-infected IL-1 receptor 1 （IL-1R1） deficient mice. Results showed that early innate immune cells and cytokine/chemokine dysregulation were observed with significantly decreased neutrophil infiltration and IL-6, TNF-α, G-CSF, KC, and MIP-2 cytokine levels in the bronchoalveolar lavage fluid of infected IL-1R1^-/- mice in comparison with that of wild type infected mice. The adaptive immune response against the H1N1 virus in IL-1 R1^-/- mice was impaired with downregulated anti-viral Thl cell, CD8＋ cell, and antibody functions, which contributes to attenuated viral clearance. Histological analysis revealed reduced lung inflammation during early infection but severe lung pathology in late infection in IL-1R1^-/- mice compared with that in WT infected mice. Moreover, the infected IL-1R1^--/ mice showed markedly reduced neutrophil generation in bone marrow and neutrophil recruitment to the inflamed lung. Together, these results suggest that IL-1 signaling is associated with pulmonary anti-influenza immune response and inflammatory lung injury, particularly via the influence on neutrophil mobilization and inflammatory cytokine/chemokine production.

关键词： Influenza Lung inflammation IL-1 receptor 1 Neutrophil

AI in spotting high-risk characteristics of medical imaging and molecular pathology

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Precision Clinical Medicine 2021年第4期4卷 271-286页

作者： Chong Zhang Jionghui Gu Yangyang Zhu Zheling meng Tong Tong Dongyang Li Zhenyu Liu Yang Du Kun Wang jie Tian Department of Big Data Management and Application School of International Economics and ManagementBeijing Technology and Business UniversityBeijing 100048China CAS Key Laboratory of Molecular Imaging Institute of AutomationChinese Academy of SciencesBeijing 100190China School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100049China Beijing Advanced Innovation Center for Big Data-Based Precision Medicine School of Medicine and EngineeringBeihang UniversityBeijing 100191China

Medical imaging provides a comprehensive perspective and rich information for disease *** with artificial intelligence technology,medical imaging can be further mined for detailed pathological *** studies have shown that the macroscopic imaging characteristics of tumors are closely related to microscopic gene,protein and molecular *** order to explore the function of artificial intelligence algorithms in in-depth analysis of medical imaging information,this paper reviews the articles published in recent years from three perspectives:medical imaging analysis method,clinical applications and the development of medical imaging in the direction of pathologicalmolecular *** believe that AI-aidedmedical imaging analysis will be extensively contributing to precise and efficient clinical decision.

关键词： machine learning radiomics medical imaging pathology artificial intelligence

Establishing a model to measure and predict the quality of gastrointestinal endoscopy

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World Journal of Gastroenterology 2019年第8期25卷 1024-1030页

作者： Luo-Wei Wang Han Lin lei Xin Wei Qian Tian-Jiao Wang Jian-Zhong Zhang Qian-Qian meng Bo Tian Xu-Dong Ma Zhao-Shen Li Digestive Endoscopy Center Department of GastroenterologyChanghai HospitalNaval Medical UniversityShanghai 200433China Unimed Scientific Inc. Wuxi 214000Jiangsu ProvinceChina Department of Intensive Care Unit Shanghai East HospitalTongji UniversityShanghai 200120China Department of Medical Quality Medical and Health AdministrationNational Health Commission of ChinaBeijing 100044China

BACKGROUND Tens of millions of gastrointestinal endoscopic procedures are performed every year in China,but the quality varies significantly and related factors are *** endoscopist-and endoscopy division-related factors may be useful to establish a model to measure and predict the quality of *** To establish a model to measure and predict the quality of gastrointestinal endoscopic procedures in China's *** Selected data on endoscopy experience,equipment,facility,qualification of endoscopists,and other relevant variables were collected from the National Database of Digestive Endoscopy of *** multivariable logistic regression analysis was used to identify the potential predictive variables for occurrence of medical malpractice and patient *** and nonlinear regressions were used to establish models to predict incidence of endoscopic *** In 2012,gastroscopy/colonoscopy-related complications in China's Mainland included bleeding in 4,359 cases(0.02%)and perforation in 914(0.003%).Endoscopic-retrograde-cholangiopancreatography-related complications included severe acute pancreatitis in 593 cases(0.3%),bleeding in 2,151(1.10%),perforation in 257(0.13%)and biliary infection in 4,125(2.11%).Moreover,1,313(5.0%)endoscopists encountered with medical malpractice,and 5,243(20.0%)encountered with the disturbance from *** length of endoscopy experience,weekly working hours,weekly night shifts,annual vacation days and job satisfaction were predictors for the occurrence of medical malpractice and patient ***,the length of endoscopy experience and the ratio of endoscopists to nurses were not adequate to establish an effective predictive model for endoscopy *** The workload and job satisfaction of endoscopists are valuable predictors for medical malpractice or patient *** comprehensive data are needed to establish quality-predictive models for endosco

关键词： Endoscopy Gastroscopy Colonoscopy Endoscopic retrograde cholangiopancreatography Quality control Predictive model Performance predictor

Effect of Saline-alkali Stress on Seed Germination and Seedling Growth of Oat

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Plant Diseases and Pests 2015年第2期6卷 26-29,41页

作者： Wang Guijun Wang lei meng Xuan Xu Zhenwen College of Urban and Environmental Sciences Changchun Normal University College of Life Sciences Northeast Normal University

Neutral black soil was mixed with strong saline-alkali soil in different weight ratios, then physiological indexes during seed germination and seedling growth in soil of different ratios and the corresponding leaching liquor treatments were observed to explore effect of saline-alkali stress on oat seed germination and seedling growth, and analyze tolerance of oat to saline-alkali soil. The results showed that germination ability of oat seeds reduced with the increasing saline-alkali stress, salt injury index increased and seedling growth was inhibited. Effect of different saline-alkali stresses on germination ability of oat seeds showed difference, and effect of leaching liquor treatment on oat seed germination was stronger than that of soil treatment.

关键词： Saline-alkali stress Oat Seed germination Growth index Inhibition

基于数值模拟的阶梯水流中行人安全撤离研究(英文)

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2015年第2期16卷 117-130页

作者： Wei-yun SHAO Li-jie JIANG lei FANG David Z. ZHU Zhi-lin SUN College of Civil Engineering and Architecture Zhejiang University Zhejiang Design Institute of Water Conservancy & Hydroelectric Power Department of Ocean Science and Engineering Zhejiang University Department of Civil and Environmental Engineering University of Alberta

目的:研究不同形式阶梯水流中被困人员的安全撤离,为地下空间水侵灾害脆弱性评价及防灾避灾提供参考。方法:根据试验结果和数值模型的相关理论构建数值模型,验证数值模拟阶梯水流流场的可靠性和合理性,并基于数值模型的灵活性和可变性,... 详细信息

目的:研究不同形式阶梯水流中被困人员的安全撤离,为地下空间水侵灾害脆弱性评价及防灾避灾提供参考。方法:根据试验结果和数值模型的相关理论构建数值模型,验证数值模拟阶梯水流流场的可靠性和合理性,并基于数值模型的灵活性和可变性,模拟休息平台、阶梯坡度和阶梯形态对水流流场的影响,据此对有无休息平台、不同阶梯坡度和不同阶梯形态下阶梯水流流态、流速分布以及对被困人员的安全撤离的影响进行深入分析。结论:中间休息平台的存在增加了被困人员撤离的风险;阶梯坡度对阶梯上水流的水力特性影响很小;L型阶梯中间休息平台有利于减小平台下游撤离风险,被困人员可以优先选择L型阶梯或者不含休息平台的直线型阶梯撤离。

关键词：阶梯休息平台水侵灾害逃生数值模拟

Weak measurement of the magneto-optical spin Hall effect of light

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Photonics Research 2019年第9期7卷 1014-1018页

作者： jie LI TINGTING TANG LI LUO JIAN SHEN CHAOYANG LI JUN QIN lei BI Information Materials and Device Applications Key Laboratory of Sichuan Provincial Universities Chengdu University of Information TechnologyChengdu610225China State Key Laboratory of Marine Resource Utilization in South China Sea Hainan UniversityHaikou570228China National Engineering Research Center of Electromagnetic Radiation Control Materials University of Electronic Science and Technology of ChinaChengdu610054China

The spin Hall effect of light(SHEL) is a photonic version of the spin Hall effect in electronic systems and has been studied for more than 10 years. However, the lack of effective methods for dynamic modulation of spin-dependent splitting may hinder its applications. By introducing additional spin-orbit coupling of photons or nonreciprocal phase shift(NRPS), the magneto-optical Kerr effect may be one of the methods to alleviate the situation. Here, we experimentally reveal an enhanced and tunable SHEL in magneto-optical oxide thin films under the transverse magneto-optical Kerr effect configuration for the first time, to the best of our knowledge, which can be regarded as the magneto-optical SHEL(MOSHEL). We study the magneto-optical response of the multilayer structure and select the optimal structural parameters by the magneto-optical transfer matrix method. With a transverse magnetic field along opposite directions, an obvious SHEL shift difference of H-polarized light caused by NRPS is observed via a weak measurement method. With optimal parameters, the maximum measured shift difference of the SHEL achieves about 70 μm. The demonstrated MOSHEL phenomenon may accelerate the application of the SHEL in the field of spin photonics devices and precision metrology.

关键词： Weak measurement of the magneto-optical spin Hall effect of light