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The Effect of Vineyard Cover Crop on Main Monomeric Phenols of Grape Berry and Wine in Vitis viniferal L. cv. Cabernet Sauvignon

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Agricultural Sciences in China 2010年第3期9卷 440-448页

作者： XI Zhu-mei ZHANG Zhen-wen cheng Yu-feng LI Hua College of Enology Northwest A＆F University/Shaanxi Engineering Research Center for Viti-Viniculture Yangling 712100 P.R.China

This study was conducted to determine the effect of cover crop inter-row in vineyard on main mono-phenol content of grape berry and wine. Three such cover crops, two perennial legumes （white clover and alfalfa） and a perennial gramineous grass （tall fescue） were sown in vineyard. The main phenolic compounds of mature grape berry and wines vinified under the same conditions were extracted with ethyl acetate and diethyl ether and analyzed by high- performance liquid chromatography （HPLC） by comparing to soil tillage. A total of ten phenolic compounds were identified and quantified in the different grape berry and wines, including nonflavonoids （hydroxybenzoic and hydroxycinnamic acids） and flavonoids （flavanols and flavonols）. The concentration of flavonoid compounds （409.43 to 538.63 mg kg^-1 and 56.16 to 81.30 mg L^-1） was higher than nonflavonoids （76.91 to 98.85 mg kg^-1 and 30.65 to 41.22 mg L^-1） for Cabernet Sauvignon grape and wine under different treatments, respectively. In the flavonoid phenolics, Catechin was the most abundant in the different grapes and wines, accounting for 74.94 to 79.70% and 48.60 to 50.62% of total nonanthocyanin phenolics quantified, respectively. Compared to soil tillage, the sward treatments showed a higher content of main mono-phenol and total nonanthocyanin phenolics in grapes and wines. There were significant differences between two cover crop treatments （tall fescue and white clover） and soil tillage for the content of benzoic acid, salicylic acid, caffeic acid, catechin, and total phenolics in the grape berry （P 〈 0.05 or P〈0.01）. The wine from tall fescue cover crop had the highest gallic acid, caffeic acid and catechin. Cover crop system increased the total nonanthocyanin phenolics of grapes and wines in order of the four treatments： tall fescue, white clover, alfalfa, and soil tillage （control）. Cover crop in vineyard increased total phenols of grape berry and wine, and thus improved the quality of wine evidently.

关键词： vineyard cover crops inter-row Cabernet Sauvignon grape berry wine monomeric phenols

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The Year-scale X-Ray Variations in the Core of M87

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Research in Astronomy and Astrophysics 2023年第6期23卷 203-211页

作者： Yu-Lin cheng Fei Xiang Heng Yu Shu-Mei Jia Xiang-Hua Li cheng-Kui Li Yong Chen wen-cheng feng Department of Astronomy Yunnan UniversityKunming 650091China Department of Astronomy Beijing Normal UniversityBeijing 100875China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Department of Physics and Institute of Theoretical Physics Nanjing Normal UniversityNanjing 210023China

The analysis of light variation of M87 can help us understand the disk *** the past decade,M87 has experienced several short-term light variabilities related to *** also find that there are year-scale X-ray variations in the core of *** light variability properties are similar to *** re-analyzing 56Chandra observations from 2007 to 2019,we distinguish the“non-flaring state”from“flaring state”in the light *** removing flaring state data,we identify four gas clumps in the nucleus and all of them can be well fitted by the clumpy-ADAF *** average mass accretion rate is~0.16M⊙yr^(-1).We analyze the photon index(Γ)-flux(2-10 keV)correlation between the non-flaring state and flaring *** the non-flaring states,the flux is inversely proportional to the photon *** the flaring states,we find no obvious correlation between the two *** addition,we find that the flare always occurs at a high mass accretion rate,and after the luminosity of the flare reaches the peak,it will be accompanied by a sudden decrease in *** results can be explained as that the energy released by magnetic reconnection destroys the structure of the accretion disk,thus the luminosity decreases rapidly and returns to normal levels thereafter.

关键词： X-rays:galaxies galaxies:clusters:individual(M87) accretion accretion disks

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Weak Merging Scenario of CLASH Cluster A209

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Research in Astronomy and Astrophysics 2024年第4期24卷 174-182页

作者： wen-cheng feng Heng Yu Hai-Hui Zhao Xiao-Lan Hou Shu-Mei Jia cheng-Kui Li Yu-Lin cheng Paolo Tozzi Ming Sun Yong Chen Department of Physics and Institute of Theoretical Physics Nanjing Normal UniversityNanjing 210023China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Department of Astronomy Beijing Normal UniversityBeijing 100875China Department of Astronomy Yunnan UniversityKunming 650091China INAF—Osservatorio Astrofisico di Arcetri Largo E.Fermi50122 FirenzeItaly Department of Astronomy University of VirginiaP.O.Box 400325CharlottesvilleVA 22904-4325USA

We study the structural and dynamical properties of A209 based on Chandra and XMM-Newton *** obtain detailed temperature,pressure,and entropy maps with the contour binning method,and find a hot region in the NW *** X-ray brightness residual map and corresponding temperature profiles reveal a possible shock front in the NW direction and a cold front feature in the SE *** with the galaxy luminosity density map we propose a weak merger scenario.A young sub-cluster passing from the SE to NW direction could explain the optical subpeak,the intracluster medium temperature map,the X-ray surface brightness excess,and the X-ray peak offset together.

关键词： X rays:galaxies:clusters galaxies:clusters:intracluster medium galaxies:clusters:Abell 209

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Expression of p53 and CD44 in Canine Breast Tumor

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Journal of Northeast Agricultural University(English Edition) 2008年第3期15卷 25-30页

作者： LIU Yun CUI wen cheng Xi feng Xinchang College of Veterinary Medicine Northeast Agricultural University Harbin 150030 China

The p53 and CD44 expression of 10 cases in canine breast tumor were examined utilizing immunohistochemical assay with rabbit anti-mouse polyclonal antibodies against p53 or CD44, respectively. The p53 expression was significantly higher in malignant than in benign breast tumor. The expression of CD44 was not significantly different in malignant breast cancer and benign breast tumor. This suggests that p53 can be used as an indicator for animal prognosis.

关键词： canine breast tumor p53 CD44

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我国硫资源利用的动态分析

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现代化工 2007年第8期27卷 59-62页

作者：温诚锋梁日忠上海大学环境与化学工程学院上海200072

运用指数平滑预测方法建立了我国硫资源产业系统的动态分析模型,对现状条件下硫资源产业系统未来发展趋势以及循环经济发展方案实施效果进行模拟与分析。此外,对不同政策力度下多循环经济发展方案的综合实施效果进行优化,得出了各方案... 详细信息

运用指数平滑预测方法建立了我国硫资源产业系统的动态分析模型,对现状条件下硫资源产业系统未来发展趋势以及循环经济发展方案实施效果进行模拟与分析。此外,对不同政策力度下多循环经济发展方案的综合实施效果进行优化,得出了各方案在不同实施力度下的最优综合实施方案。分析结论将为实现我国硫资源产业可持续发展提供决策思路和政策依据。

关键词：硫资源动态分析分析模型指数平滑预测

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论“双一流”建设背景下广西本科院校的人才集聚与管理

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民族教育研究 2019年第4期30卷 149-155页

作者：程文凤广西民族大学人事处广西民族大学民族学与社会学学院

在国家'双一流'建设背景下,广西本科院校面临着人才集聚与管理的诸多问题,主要表现在高端人才匮乏、专业发展平台缺乏和人才效益发挥有限三个方面,且较外省一流高校突出。从原因分析来看,阻碍广西本科院校人才集聚和人才管理的因素除了... 详细信息

在国家'双一流'建设背景下,广西本科院校面临着人才集聚与管理的诸多问题,主要表现在高端人才匮乏、专业发展平台缺乏和人才效益发挥有限三个方面,且较外省一流高校突出。从原因分析来看,阻碍广西本科院校人才集聚和人才管理的因素除了客观原因之外,主要在于主观方面,一是追求高大上,缺少切合实际的人才需求规划;二是对待人才'增量'与'存量'的失衡;三是缺少科学合理的学术评价机制。为实现人才的有效集聚与管理,提升'双一流'建设水平,广西本科院校应厘清思路,科学规划和实施人才集聚和管理策略;创新学术管理和学术评价的机制,建立健全校、院两级学术管理和学术评价体系;制定、出台科学的人才管理政策,协调、平衡引进人才与校内人才的待遇。

关键词： “双一流” 广西本科院校人才集聚人才管理

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变压器绕组频响测试法相关问题的研究

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电测与仪表 2013年第6期50卷 41-43,77页

作者：程文锋喇元广东电网公司电力科学研究院广州510080

从变压器的基本构造原理和电磁场与电磁波的角度出发,研究了在仪器制造和测量过程中注意的事项。通过变压器绕组参数辨识方法的仿真分析,发现变压器绕组的拓扑结构在频响法测试中发生了根本变化,参数具有非线性,导致普通的电路原理知识... 详细信息

从变压器的基本构造原理和电磁场与电磁波的角度出发,研究了在仪器制造和测量过程中注意的事项。通过变压器绕组参数辨识方法的仿真分析,发现变压器绕组的拓扑结构在频响法测试中发生了根本变化,参数具有非线性,导致普通的电路原理知识已不适用,应该从电磁场的角度来分析。在此基础上,通过理论结合实例全面分析了在整个频响法测试中,铁心已不起作用,起主导作用的是漏电抗而非励磁电抗。本文对于从事变压器研究或电力从业者具有重要的实践意义。

关键词：变压器绕组变形非线性漏电抗铁心

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基于爱泼斯坦方圈测试的硅钢片磁化曲线特性分析

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变压器 2017年第12期54卷 25-28页

作者：程文锋史正军广东电网有限责任公司电力科学研究院广东广州510510

带铁心的线圈类产品要实现准确的仿真设计最核心的内容是铁心的磁化曲线分析。本文通过爱泼斯坦方圈测试方法,测试了取向硅钢片B30P105的磁化曲线特性,分析了取向硅钢片轧制方向和垂直于轧制方向的磁化曲线、不同频率下的磁化曲线和铁... 详细信息

带铁心的线圈类产品要实现准确的仿真设计最核心的内容是铁心的磁化曲线分析。本文通过爱泼斯坦方圈测试方法,测试了取向硅钢片B30P105的磁化曲线特性,分析了取向硅钢片轧制方向和垂直于轧制方向的磁化曲线、不同频率下的磁化曲线和铁心损耗。本文还制作了三种不同叠置方式下的铁心线圈,测试了它们的磁化曲线和铁心损耗曲线,并进行对比分析。通过本文硅钢片磁化曲线测试分析,对带铁心的线圈类产品仿真设计具有重要的工程意义。

关键词：爱泼斯坦方圈硅钢片磁化曲线轧制方向

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