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Integrin-like Protein Is Involved in the Osmotic Stressinduced Abscisic Acid Biosynthesis in Arabidopsis thaliana

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Journal of Integrative Plant Biology 2007年第4期49卷 540-549页

作者： Bing lv Feng Chen Zhong-Hua Gong Hong Xie Jian-Sheng Liang Laboratory of Plant Growth and Development & Proteomics College of Bioscience and Biotechnology Yangzhou University Yangzhou 225009 China

We studied the perception of plant cells to osmotic stress that leads to the accumulation of abscisic acid （ABA） in stressed Arabidopsis thaliana L. cells. A significant difference was found between protoplasts and cells in terms of their responses to osmotic stress and ABA biosynthesis, implying that cell wall and/or cell wall-plasma membrane interaction are essential in identifying osmotic stress. Western blotting and immunofluorescence localization experiments, using polyclonal antibody against human integrin β1, revealed the existence of a protein similar to the integrin protein of animals in the suspension-cultured cells located in the plasma membrane fraction. Treatment with a synthetic pentapeptide, Gly-Arg-Gly-Asp-Ser （GRGDS）, which contains an RGD domain and interacts specifically with integrin protein and thus blocks the cell wall-plasma membrane interaction, significantly inhibited osmotic stress-induced ABA biosynthesis in cells, but not in protoplasts. These results demonstrate that cell wall and/or cell wall-plasma membrane interaction mediated by integrin-Iike proteins played important roles in osmotic stress-induced ABA biosynthesis in Arabidopsis thaliana.

关键词： abscisic acid Arabidopsis thaliana cell wall-plasma membrane interaction integrin-like protein osmotic stress.

Interference alignment scheme for massive MIMO system

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The Journal of China Universities of Posts and Telecommunications 2014年第4期21卷 19-24页

作者： JIANG Jing lv Wei SUN Bo LU Guang-yue XIE Yong-bin School of Communication and Information Engineering Xi'an University of Posts & Telecommunications Wireless Technology Pre-research Unit ZTE Cooperation

The performance of massive multiple-input multiple-output （MIMO） system is limited by pilot contamination. To reduce the pilot contamination, uplink and downlink precoding algorithms are put forward based on interference alignment criterion. In the uplink receiving processing, the target function aligns the pilot contamination and the interference signals to the same null space and acquires the maximal space degree of the desired signals. The uplink receiving precoding matrix is solved on maximal signal to interference plus noise ratio （SINR） criterion considering the impact of the pilot contamination on channel estimations. The uplink receiving precoding matrix is used as the downlink transmitting precoding matrix. Exploiting the channel reciprocity, it is proved that, if the uplink receiving precoding matrix achieves maximal S1NR, the identical precoding matrix can be used in the downlink transmission and acquires maximal signal to leakage plus noise ratio （SLNR）. Simulations show that the spectrum efficiency of the proposed algorithm can reach about 1.5 times higher than that of popular matched filtering （MF） precoding algorithm, and about 1.1 times higher than multi-cell minimum mean square error （MMSE） precoding algorithm. The performance of the proposed algorithm can be improved approximately linearly with the increasing of the number of antennas.

关键词： massive MIMO large scale MIMO pilot contamination precoding interference alignment

Ar Pressure Dependence of the Properties of Molybdenum-doped ZnO Films Grown by RF Magnetron Sputtering

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Journal of Materials Science & Technology 2007年第4期23卷 509-512页

作者： Xianwu XIU Zhiyong PANG Maoshui lv Ying DAI Li＇na YE Shenghao HAN School of Physics and Microelectronics State Key Laboratory of Crystal Materials Shandong University Jinan 250100 China Department of Space Science and Applied Physics Shandong University at Weihai Weihai 264209 China

Transparent conducting oxide film of molybdenum-doped zinc oxide （MZO） with high transparency and relatively low resistivity was prepared by RF （radio frequency） magnetron sputtering at room temperature. The structural, electrical, and optical properties of the films deposited under different Ar pressure were *** （X-ray diffraction） patterns show that the nature of the films is polycrystalline with a hexagonal structure and a preferred orientation along the c-axis. The resistivity increases as Ar pressure increases. The lowest range exceeds 88% for all the samples. The optical band gap decreases from 3.27 to 3.15 eV with increasing Ar pressure from 0.6 to 3.0 Pa.

关键词： Zinc oxide Magnetron sputtering Ar pressure Molybdenum-doped ZnO Films

扶贫政策对农村家庭子女接受高等教育的影响——来自中国家庭金融调查数据的证据

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教育经济评论 2024年第1期9卷 86-103页

作者：李俊杰苏丽锋吕伟健贵州财经大学公共管理学院对外经济贸易大学国家对外开放研究院教育与开放经济研究中心

我国脱贫攻坚事业的全面成功,不仅带来了农村地区经济社会发展和人民生活水平提升,也在一定程度上有利于农村家庭子女高等教育入学机会的提升。研究基于2012—2018年中国家庭金融调查数据(CHFS),采用双重差分(DID)方法,以2014年开始的... 详细信息

我国脱贫攻坚事业的全面成功,不仅带来了农村地区经济社会发展和人民生活水平提升,也在一定程度上有利于农村家庭子女高等教育入学机会的提升。研究基于2012—2018年中国家庭金融调查数据(CHFS),采用双重差分(DID)方法,以2014年开始的精准扶贫政策为政策工具,测算和评估了扶贫政策对我国农村家庭高等教育入学机会的政策效应。研究发现,精准扶贫政策的实施,使农村贫困户家庭子女的平均高等教育入学机会提升约5.7%,主要体现在接受大专以上层次教育概率的显著提升,但对本科以上层次受教育机会的提高不明显。研究结论为评估我国扶贫工作的政策效应,推动新时代脱贫成果巩固与乡村振兴有效衔接,促进高等教育机会公平提供了必要的经验证据。

关键词：扶贫政策高等教育入学机会农村教育

Effect of dietary stable isotopic ratios of carbon and nitrogen on the extent of their incorporation into tissues of rats

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Journal of Animal Science and Biotechnology 2012年第2期3卷 100-107页

作者： Wentao lv Tingting Ju Bing Dong Boyang Yu Jingdong Yin State Key Laboratory of Animal Nutrition China Agricultural UniversityNo.2 West Road Yuanmingyuan100193BeijingChina

This study was conducted to investigate the effect of different dietary ratios of 13C to 12C or 15 N to 14N on their relative incorporation into tissues. Eighty male rats were used in two 21-day feeding trials in which they were fed diets with either high δ13C levels （δ13C=-13.89%o and δ15N =2.37%o in experiment 1 and δ13C=-19.34%o and δ15N = 4.73%o in experiment 2） or low 613C levels （δ13C =-17.90%o and δ15N = 3.08%o in experiment 1 and δ13C =-21.76%o and δ15N = 0.53‰ in experiment 2）, meanwhile, the dietary δ15N levels were designed to two ranks Blood, liver, adipose and muscle tissues were collected on day 0, 3, 7, 14, and 21 for determination of 13C, 12C, 15N and 14 N isotopes. Rat growth rate, antioxidant capacity and metabolic parameters were also assessed. The results indicate that adipose tissue tend to deplete 13C before the stable isotopic ratios achieved final equilibrium. Therefore, feeds with different isotopic signatures had different incorporation rates into tissues. Low dietary 13C levels decreased tissue δ13C values whereas high dietary 13C levels did not alter tissue δ13C values during the 21-d experiment. Blood δ15N values were a reliable parameter in assessing the relative contribution of dietary nitrogen to tissues. This study revealed a relationship between dietary tissues. However, more studies are needed to illustrate the sotopic signatures and their incorporation rates into rat mechanism through which dietary isotopic ratios nfiuence the extent of isotopic incorporation into the tissues

关键词： Carbon Diet Nitrogen Stable isotopes

Image-Based Modeling for Atherosclerotic Coronary Plaque Progression and Vulnerability Research

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医用生物力学 2019年第A1期34卷 81-82页

作者： Rui lv Liang Wang Dalin Tang School of Biological Science&Medical Engineering Southeast UniversityNanjing210009China MathematicalSciences Department Worcester Polytechnic InstituteWorcesterMA01609USA

China Cardiovascular Disease Report 2017(Summary)pointed out that at present,cardiovascular diseases(CVD)account for the highest number of deaths among urban and rural *** the middle or later stages of atherosclerosis,the plaques become increasingly unstable with high chance to rupture,which may lead acute death from coronary heart *** imaging and image-based computational modeling have been used in recent years to quantify ather-osclerotic plaque morphological and biomechanical characteristics and predict the coronary plaque growth and rupture *** the vulnerability of plaques effectively could lead to better patient screening strategies and enable physicians to adopt timely and necessary intervention or conservative *** investigations of vulnerable plaques were mostly based on histopathological *** the accumulation of experience in pathology and the gradual enrichment of autopsy materials,the criteria for the diagnosis of vulnerable plaques appeared in 2001,mainly manifested as the necrotic lipid nuclei,fibrous caps that are infiltrated by a large number of macrophages,and fibrous cap thickness less than 65μ*** of the obvious importance of the thin fibrous cap in the study of plaque vulnerability,it has been a focus of attention by many ***,*** *** concerned about the formation of early fibrous caps in recent *** presentation of local maximum stress on plaque further confirmed the importance of thin fibrous *** development of medical images has greatly promoted the study of coronary *** with autopsy ex vivo,medical image could provide plaque data under in vivo conditions and greatly promote the study of coronary *** XY et *** ex vivo magnetic resonance imaging(MRI)to study the relationship between plaque wall stress(PWS)and death caused by coronary artery *** to technical limitations and the accessibility of the corona

关键词： IVUS OCT coronary plaque vulnerable plaque

The effect of a seasonal stratification variation on the load exerted by internal solitary waves on a cylindrical pile

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Acta Oceanologica Sinica 2014年第7期33卷 21-26页

作者： CAI Shuqun XU Jiexin CHEN Zhiwu XIE Jieshuo DENG Xiaodong lv Haibin State Key Laboratory of Tropical Oceanography South China Sea Institute of Oceanology Chinese Academy of Sciences University of Chinese Academy of Sciences

On the basis of Morison＇s empirical formula and modal separation method in estimating the force and torque exerted by internal solitary waves （ISWs） on a cylindrical pile, it is found that the loads exerted by the ISWs change largely in different seasons at the same site of the continental shelf in the South China Sea （SCS） even under the condition that the amplitudes of ISWs are the same. Thus, the effect of a seasonal water stratification variation on the force and torque exerted by the ISWs is investigated, and a three-parameter stratification model is employed. It is shown that the loads exerted by the ISWs depend largely on the wa- ter stratification. The stronger the water stratification, the larger the force and the torque; when the depth where the maximum thermocline appears is deepened, the force decreases but the torque increases; when the width of the thermocline is narrowed, the force increases but the torque decreases. The seasonal varia- tion of the force and the torque exerted by the ISWs in four seasons in the SCS is thus explained. Key words： internal solitary waves, force, torque, water stratification, South China Sea

关键词： internal solitary waves force torque water stratification South China Sea

Effect of temperature and moisture on soil organic carbon mineralization of predominantly permafrost peatland in the Great Hing'an Mountains,Northeastern China

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Journal of Environmental Sciences 2010年第7期22卷 1057-1066页

作者： Xianwei Wang Xiuzhen Li Yuanman Hu Jiujun lv Ju Sun Zongmei Li Zhifeng Wu Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China Graduate School of Chinese Academy of Sciences Beijing 100039 China Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Changchun 130012 China

Boreal peatlands represent a large global carbon pool. The relationships between carbon mineralization, soil temperature and moisture in the permafrost peatlands of the Great Hing＇an Mountains, China, were examined. The CO2 emissions were measured during laboratory incubations of samples from four sites under different temperatures （5, 10, 15, and 20℃） and moisture contents （0%, 30%, 60%, 100% water holding capacity （WHC） and completely water saturated）. Total carbon mineralization ranged from 15.51 to 112.92 mg C under the treatments for all sites. Carbon mineralization rates decreased with soil depth, increased with temperature, and reached the highest at 60% WHC at the same temperature. The calculated temperature coefficient （Q10） values ranged from 1.84 to 2.51 with the soil depths and moisture. However, the values were not significantly affected by soil moisture and depth for all sites due to the different peat properties （P 〉 0.05）. We found that the carbon mineralization could be successfully predicted as a two-compartment function with temperature and moisture （R^2 〉 0.96） and total carbon mineralization was significantly affected by temperature and moisture （P 〈 0.05）. Thus, temperature and moisture would play important roles in carbon mineralization of permafrost peatlands in the Great Hing＇an Mountains, indicating that the permafrost peatlands would be sensitive to the environment change, and the permafrost peatlands would be potentially mineralized under future climate change.

关键词： Great Hing'an Mountains permafrost peatland mineralization climate change

不同频率重复经颅磁刺激对急性脑梗死后吞咽障碍的康复效果比较

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罕少疾病杂志 2024年第2期31卷 23-25,40页

作者：吕志剑李敬亮王国胜安阳市人民医院康复科河南安阳455000 郑州大学第五附属医院康复医学科河南郑州450000

目的对急性脑梗死后吞咽障碍选用不同频率的重复经颅磁刺激(rTMS),研究其康复效果差异。方法采取前瞻性随机分组对照试验,选取2021年7月~2023年1月就诊于医院的急性脑梗死后吞咽障碍患者160例为研究对象,采取随机数字表法分为对照组、... 详细信息

目的对急性脑梗死后吞咽障碍选用不同频率的重复经颅磁刺激(rTMS),研究其康复效果差异。方法采取前瞻性随机分组对照试验,选取2021年7月~2023年1月就诊于医院的急性脑梗死后吞咽障碍患者160例为研究对象,采取随机数字表法分为对照组、低频组(1 Hz)、中频组(5 Hz)、高频组(10 Hz),每组40例。在常规治疗基础上各组患者进行不同频率的rTMS治疗,连续干预14天。在治疗前后参考功能性经口摄食量表(FOIS)和吞咽生活质量量表(SWAL-QOL)评估其经口摄食能力和生活质量水平;采取洼田饮水试验评价吞咽困难治疗效果;治疗前后采取彩色超声经颅多普勒血管检查仪检测大脑中动脉(MCA)、椎动脉(VA)的血流速度和搏动指数;观察各组不良反应发生率。结果治疗后,各组经口摄食评分均高于治疗前(P中频组>低频组>对照组(P中频组>低频组>对照组(P对照组(P治疗前(P中频组>低频组>对照组(P中频组>低频组>对照组(P0.05)。结论对急性脑梗死后吞咽障碍患者使用各频率rTMS治疗,效果、安全性均可兼顾,其中10 Hz频率在增强患者经口摄食、吞咽能力、提高生活质量及改善脑血流参数方面效果最佳。

关键词：磁刺激频率急性脑梗死吞咽障碍血流速度