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组织透明法观察葡萄叶片生长过程中气孔与叶脉形态结构特征变化

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植物生理学报 2018年第2期54卷 237-246页

作者：谢兆森杜鸿儒李建宝 bhaskar Bondada 河北科技师范学院园艺科技学院河北秦皇岛066600 华盛顿州立大学葡萄栽培与酿造科研中心美国华盛顿州里奇兰市99354

本文以‘摩尔多瓦’葡萄叶片为试验材料,采用组织透明法观察了葡萄叶片生长过程中叶片表皮细胞、气孔和叶脉形态结构的变化,测定与气孔和叶脉功能相关的生理指标变化,比较了组织透明法、指甲油法和撕取法在观察葡萄叶片气孔上的实验效... 详细信息

本文以‘摩尔多瓦’葡萄叶片为试验材料,采用组织透明法观察了葡萄叶片生长过程中叶片表皮细胞、气孔和叶脉形态结构的变化,测定与气孔和叶脉功能相关的生理指标变化,比较了组织透明法、指甲油法和撕取法在观察葡萄叶片气孔上的实验效果。结果表明:组织透明法能够清晰观察到葡萄叶片生长过程中叶片表皮细胞、气孔和叶脉形态结构的变化。相对于指甲油法、撕取法,组织透明法操作简单,且能保持组织完整性,提升观察叶片细胞结构的实验效果。从叶片生长过程中气孔形态结构变化规律来看,葡萄嫩叶齿尖存在大量的大气孔,而叶片中部只观察到中央大气孔和正在发育的气孔保卫细胞母细胞。随着叶片生长,叶片气孔保卫细胞母细胞逐渐发育形成成熟气孔,叶片末端叶脉也是随叶片生长而生长,叶脉密度逐渐增加,提高了树体往叶片供水的效率。从与气孔和叶脉功能相关的各项生理指标变化来看,气孔导度随着气孔逐渐形成和成熟而逐渐升高,但叶片含水量和水势下降,有利于拉升水分和养分从根系往地上树体各器官运输,满足整个植株生长发育的需要。

关键词：葡萄组织透明叶片气孔叶脉

Spectroscopic Survey of Hα Emission Line Stars Associated with Bright Rimmed Clouds

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International Journal of Astronomy and Astrophysics 2019年第2期9卷 154-171页

作者： Kensuke Hosoya Yoichi Itoh Yumiko Oasa Ranjan gupta Asoke Kumar sen Nishi-Harima Astronomical Observatory Center for AstronomyUniversity of HyogoKobeJapan Faculty of Education Saitama UniversitySaitamaJapan Inter University Center for Astronomy and Astrophysics(IUCAA) PuneIndia Department of Physics Assam UniversitySilcharIndia

The results of a spectroscopic survey of Hα emission line stars associated with fourteen bright rimmed clouds are presented. Slit-less optical spectroscopy was carried out with the Inter University Centre for Astronomy and Astrophysics (IUCAA) 2 m telescope and IUCAA Faint Object Spectrograph and Camera (IFOSC). Hα emission line was detected from 173 objects. Among them 85 objects have a strong Hα emission line with its equivalent width larger than 10 ?. Those are classical T Tauri stars. 52 objects have a weak Hα emission line with its equivalent width less than 10 ? and do not show intrinsic near-infrared excess. Those are weak-line T Tauri stars. On the other hand, 36 objects have a weak Hα emission line (?), although they show intrinsic near-infrared excess. Such objects are not common in low-mass star forming regions. Those are misfits of the general concept on formation process of a low-mass star, in which it evolves from a classical T Tauri star to a weak-line T Tauri star. Those might be weak-line T Tauri stars with a flared disk in which gas is heated by ultraviolet radiation from a nearby early-type star. Alternatively, we propose pre-transitional disk objects as their evolutional stage.

关键词： Star Formation Pre-Main Sequence Stars T Tauri Stars

Trend in Observed and Projected Maximum and Minimum Temperature over N-W Himalayan Basin

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Journal of Mountain Science 2015年第2期12卷 417-433页

作者： Dharmaveer SINGH Sanjay K JAIN Rajan Dev gupta GIS Cell Motilal Nehru National Institute of Technology Allahabad Water Resources Systems Division National Institute of Hydrology Department of Civil Engineering Motilal Nehru National Institute of Technology Allahabad

Recently, study in past trends of climate variables gained significant consideration because of its contribution in adaptions and mitigation strategies for potential future changes in climate, primarily in the area of water resource management. Future interannual and inter-seasonal variations in maximum and minimum temperature may bring significant changes in hydrological systems and affect regional water resources. The present study has been performed to observe past(1970-2010) as well as future(2011-2100)spatial and temporal variability in temperature(maximum and minimum) over selected stations of Sutlej basin located in North-Western Himalayan region in India. The generation of future time series of temperature data at different stations is done using statistical downscaling technique. The nonparametric test methods, modified Mann-Kendall test and Cumulative Sum chart are used for detecting monotonic trend and sequential shift in time series of maximum and minimum temperature. sen's slope estimator test is used to detect the magnitude of change over a period of time on annual and seasonal basis. The cooling experienced in annual TMax and TMin at Kasol in past(1970-2010) would be replaced by warming in future as increasing trends are detected in TMax during 2020 s and 2050 s and in TMin during 2020 s, 2050 s and 2080 s under A1 B and A2 scenarios. Similar results of warming are also predicted at Sunnifor annual TMin in future under both scenarios which witnessed cooling during 1970-2010. The rise in TMin at Rampur is predicted to be continued in future as increasing trends are obtained under both the scenarios. Seasonal trend analysis reveals large variability in trends of TMax and TMin over these stations for the future periods.

关键词： Statistical downscaling model Canadian Coupled Global Climate Model Temperature MannKendall test sen’s slope estimator

Ethnomedicinal Plants Used in the Healthcare Systems of Tribes of Dantewada, Chhattisgarh India

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American Journal of Plant Sciences 2014年第11期5卷 1632-1643页

作者： Pankaj K. Sahu Vanee Masih Sharmistha gupta Devki L. sen Anushree Tiwari Department of Botany Dr. C. V. Raman University Kota Bilaspur India Department of Botany Government Science College Raipur India West Bengal State Council of Science & Technology Kolkata India

The tribal people depend on forests for their livelihood and most of the rural people still depend on traditional medicine as a primary healthcare source. The paper highlights the rich plant resources and the vast wealth of ethnobotanical information available with the various tribes of the region. In this paper, some new and less known ethno medicinal uses of 104 plants of tribes of Dantewada, Dakshin Bastar C.G. in different ailments have been reported. The main objective of present work is to give the information and documentation of medicinal plant used by tribal of the study sites. The ethnomedicinal information was gathered from interviews with living elders belonging to Madiya, Muriya, Gond and Bhatra tribes of the study area. The present work on ethnomedicinal plants, used in the healthcare systems of tribes in 15 villages, was carried out from Geedam block of Dantewada, Dakshin Bastar C.G.

关键词： Phytotheraphy Tribe Ethno Botany Documentation Dantewada

Aspect Ratio: A Major Controlling Factor of Radiation Characteristics of Microstrip Antenna

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Journal of Electromagnetic Analysis and Applications 2011年第11期3卷 452-457页

作者： Syed Md. Danish Abbas Sharmistha Paul Jhelam sen Prity Rani gupta Kaushik Malakar Sudipta Chattopadhyay Sandip Banerjee 不详

The effect of aspect ratio (width-to-length ratio) on overall radiation characteristics of a rectangular microstrip patch antenna is theoretically investigated with a view to develop a concrete physical insight in to the phenomenon. The detailed variation of co polarized and cross polarized radiation performance as a function of aspect ratio is thoroughly presented. The gain enhancement of a microstrip patch antenna along with a radical variation of cross polarized field radiation with aspect ratio is obtained. Indeed the conjecture of occurring different fringing fields with different aspect ratio is employed to theoretically estimate the effective size of a rectangular patch, and hence to determine the quantitative change in the gain value. Close agreement amongst the theory and simulations justifies the conjecture indicating a concrete physical insight in to the fact. The aspect ratio for which the cross polarized field radiation is minimum for a particular patch is also presented and justified quantitatively.

关键词： Aspect Ratio Co-Polarized Gain Cross Polarized Radiation Microstrip Patch

Surrogate-based modeling and dimension reduction techniques for multi-scale mechanics problems

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Acta Mechanica Sinica 2011年第6期27卷 845-865页

作者： Wei Shyy Young-Chang Cho Wenbo Du Amit gupta Chien-Chou Tseng Ann Marie Sastry Hong Kong University of Science and Technology Clear Water Bay Hong Kong China University of Michigan Ann Arbor MI USA National Taiwan Sun Yat-sen University Kaohsiung Taiwan China

Successful modeling and/or design of engineering systems often requires one to address the impact of multiple ＂design variables＂ on the prescribed *** are often multiple,competing objectives based on which we assess the outcome of *** accurate,high fidelity models are typically time consuming and computationally expensive,comprehensive evaluations can be conducted only if an efficient framework is ***,informed decisions of the model/hardware＇s overall performance rely on an adequate understanding of the global,not local,sensitivity of the individual design variables on the *** surrogate-based approach,which involves approximating the objectives as continuous functions of design variables from limited data,offers a rational framework to reduce the number of important input variables,i.e.,the dimension of a design or modeling *** this paper,we review the fundamental issues that arise in surrogate-based analysis and optimization,highlighting concepts,methods,techniques,as well as modeling implications for mechanics *** aid the discussions of the issues involved,we summarize recent efforts in investigating cryogenic cavitating flows,active flow control based on dielectric barrier discharge concepts,and lithium（Li）-ion *** is also stressed that many multi-scale mechanics problems can naturally benefit from the surrogate approach for ＂scale bridging.＂

关键词： Multi-scale mechanics ~ Cryogenic cavitating flow Surrogate-based modeling Active flow control Engineering system

微量进样注射-火焰原子吸收光谱法测定硅酸盐岩石和四个新的加拿大铁建造参考物料中的钪、钇和镧系元素

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地球与环境 1986年第2期 67-70页

作者： J.G.sen gupta ,但德忠成都地质学院

关于稀土元素丰度的研究对岩石成因模式讨论要求建立快速测定各种不同的火成岩、沉积岩和造岩矿物中稀土元素的分析方法。早先报道了一种测定某些矿物岩石中的 Y、Nd、Eu、Dy、Ho、Er、Tm 和 Yb 的原子吸收光谱法,它是将样品溶液(含1%La... 详细信息

关于稀土元素丰度的研究对岩石成因模式讨论要求建立快速测定各种不同的火成岩、沉积岩和造岩矿物中稀土元素的分析方法。早先报道了一种测定某些矿物岩石中的 Y、Nd、Eu、Dy、Ho、Er、Tm 和 Yb 的原子吸收光谱法,它是将样品溶液(含1%La 作光谱缓冲剂的高氯酸盐乙醇介质)直接抽吸进入氧化亚氮-乙炔焰。而稀土元素(REE)是先通过草酸钙共

关键词：火焰原子吸收光谱法过氧化氢岩石双氧水过氧化物微量进样硝酸氮化合物样品溶液稀土元素 ⅢB族元素表面皿表玻璃电热板预富集烧杯痕量稀土缓冲剂加拿大北美洲物料

地质物料与有关物料中微量与超微量贵金属测定

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新疆有色金属 1991年第4期14卷 84-89页

作者： J.G.sen gupta 许孙曲

以前的研究工作者已用电热 AAS 法测定了岩矿与天然水中的金,岩矿中的银、土壤与岩矿中的钯,土壤、岩矿与海产品中的铂,岩矿中的铑和岩矿与海产品中中的铱。但是,这些方法多数只用于测定一种或最多三种贵金属,尚无关于可应用于全部贵金... 详细信息

以前的研究工作者已用电热 AAS 法测定了岩矿与天然水中的金,岩矿中的银、土壤与岩矿中的钯,土壤、岩矿与海产品中的铂,岩矿中的铑和岩矿与海产品中中的铱。但是,这些方法多数只用于测定一种或最多三种贵金属,尚无关于可应用于全部贵金属的方法。因此,研究了石墨炉 AAS 法对于测定所研究的物料中的全部贵金属的适用性。

关键词：岩矿天然水石墨炉超微量共沉淀法石墨管离子交换法洗脱液 GFAAS 校准曲线

石墨炉原子吸收光谱法测定岩石中的钇和稀土元素

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地球与环境 1982年第1期 48-51页

作者： J.G.sen gupta ,余泽宇四川省煤田地质研究所

把Y、Nd、Sm、Eu、Dy、Ho,Er、Tm和Yb的高氯酸盐乙醇溶液吸入一氧化二氮-乙炔焰中,得到了这些元素的良好灵敏度,从而设计出一种测定各种岩石和矿物中上述元素的原子吸收法。但是,火焰原子吸收法的灵敏度不能满足大多数岩石中痕量Pr、Gd... 详细信息

把Y、Nd、Sm、Eu、Dy、Ho,Er、Tm和Yb的高氯酸盐乙醇溶液吸入一氧化二氮-乙炔焰中,得到了这些元素的良好灵敏度,从而设计出一种测定各种岩石和矿物中上述元素的原子吸收法。但是,火焰原子吸收法的灵敏度不能满足大多数岩石中痕量Pr、Gd、Tb和Lu的测定要求。为此,笔者研究了更加灵敏的石墨炉原子化技术。其他分析工作者已用电热原子化法研究了一种或

关键词：稀土元素 ⅢB族元素石墨炉原子吸收光谱原子化石墨炉原子吸收法火焰原子吸收法岩石