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Bank erosion in an Andean páramo river system: Implications for hydro-development and carbon dynamics in the neotropical Andes

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Journal of Mountain Science 2019年第2期16卷 243-255页

作者： Derek J.MARTIN c.ristopher ely Beverley c.WEMPLE Department of Geography and Planning Appalachian State University Department of Geography University of Vermont

The páramo of the Northern Andes provide critically important ecosystem services to the Northern Andean region in the form of water provisioning and carbon sequestration, both of which are a result of the páramo?s organic-rich soils. Little is known, however, about the hydro-geomorphic characteristics of the rivers that drain these ecosystems. With impending plans for widespread hydro-development and increasing implementation of carbon-sequestering compensation for ecosystem services programs in the region it is imperative that we develop a thorough understanding of the hydrogeomorphic role that rivers play in this unique ecosystem. The objective of this study was to quantify bank erosion along an Amazonian headwater stream draining a small, relatively undisturbed páramo catchment to gain a better understanding of the natural erosion regime and the resulting sediment contributions from this unique ecosystem. This study implemented a combination of field, laboratory, and Geographic Information Systems techniques to quantify bank erosion rates and determine a bank erosion sediment yield from the Ningar River, a small páramo catchment(22.7 km^2) located in the eastern Andean cordillera of Ecuador. Results show that bank erosion rates range from 3.0 to ≥ 390.0 mm/yr, are highly episodic, and yield at least 487 tons of sediment annually to the Ningar River. These results imply that 1) páramo ecosystems substantially contribute to the sediment load of the Amazon River basin; 2) bank erosion is a potentially significant flux component of basin-scale carbon cycles in páramo ecosystems; and 3) hydrologic alteration campaigns(dam building) will likely critically alter these contributions and concomitantly disconnect a critical source of sediment and nutrients to downstream ecosystems.

关键词： Bank erosion Páramo Fluvial geomorphology Andes

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Type Ⅰ kerogen-rich oil shale from the Democratic Republic of the congo: mineralogical description and pyrolysis kinetics

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Petroleum Science 2020年第1期17卷 255-267页

作者： Rajaa Bouamoud ely cheikh Moine Raphaèl Mulongo-Masamba Adnane El Hamidi Mohammed Halim Said Arsalane Laboratory of Nanomaterials Nanotechnologies and EnvironmentCenter of Science of MaterialsFaculty of SciencesMohammed V University in RabatAvenue Ibn BattoutaBP:101410000 RabatMorocco Research Unit of Materials chemistry Faculty of Science and TechnologyUNANouakchottMauritania Department of Geochemistry Center for Geological and Mining Research(CGMR)KinshasaDemocratic Republic of the Congo

The Democratic Republic of the congo holds important reserves of oil shale which is still under geological ***,the characterization and pyrolysis kinetics of typeⅠkerogen-rich oil shale of the western central Kongo(cK)were investigated.X-ray diffraction,Fourier-transform infrared spectroscopy and thermal analysis(TG/DTA)showed that cK oil shale exhibits a siliceous mineral matrix with a consistent organic matter rich in aliphatic *** pyrolysis behavior of kerogen revealed the presence of a single mass loss between 300 and 550°c,estimated at 12.5%and attributed to the oil production ***-isothermal kinetics was performed by determining the activation energy using the iterative isoconversional model-free methods and exhibits a constant value with E=211.5±4.7 kJ *** most probable kinetic model describing the kerogen pyrolysis mechanism was obtained using the coats–Redfern and Arrhenius plot *** results showed a unique kinetic triplet confirming the nature of kerogen,predominantly typeⅠand reinforcing the previously reported geochemical characteristics of the cK oil ***,the calculation of thermodynamic parameters(ΔH~*,ΔS~*andΔG~*)corresponding to the pyrolysis of typeⅠkerogen revealed that the process is non-spontaneous,in agreement with DTA experiments.

关键词： TypeⅠkerogen Pyrolysis kinetics Isoconversional methods Mineralogy central Kongo oil shale

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扫频技术

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真空电子技术 1972年第3期 3-13页

作者： Paul c. ely

扫频技术的迅速发展,对微波技术水平的提高起着极为重要的作用。本文讨论了扫频测量系统中的一些关键元件,详细论述了以扫频为基础的反射系数测量的进展。利用讯号流图分析了反射计和开槽线的精确度。比较结果表明,在典型实验室中,扫频... 详细信息

扫频技术的迅速发展,对微波技术水平的提高起着极为重要的作用。本文讨论了扫频测量系统中的一些关键元件,详细论述了以扫频为基础的反射系数测量的进展。利用讯号流图分析了反射计和开槽线的精确度。比较结果表明,在典型实验室中,扫频测量具有的精确度与缓慢而繁琐的固定频率测量的精确度相当。研制一种能够以复数散射矩障全面表征高频网络特性的仪器,这是一项重大进展。文中对好几种扫频测量微波参量的幅值和相位的新方法作了说明,引入了经改进的S参量设计程序。

关键词：反射计反射系数分布参数测量设备扫频测量技术扫频技术开槽线

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热带普通小球藻生长过程中色素质量浓度和颜色值变化及相关性分析

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南方水产科学 2021年第1期17卷 32-38页

作者：郑兴吝思琪杨守国张兴志 VASQUEZ Herbert ely 顾志峰王爱民海南大学海洋学院海南海口570228 海南大学/南海海洋资源利用国家重点实验室海南海口570228 海南省海洋与渔业科学院海南海口571126 广西水产科学研究院广西南宁530021

该文基于cIE-L*a*b*颜色分析系统,采用全自动分光测色仪对热带普通小球藻(chlorella vulgaris)生长过程中的颜色值变化进行监测,同时测定其细胞密度及色素的质量浓度变化并进行相关分析。结果显示,热带普通小球藻生长过程中细胞密度分... 详细信息

该文基于cIE-L*a*b*颜色分析系统,采用全自动分光测色仪对热带普通小球藻(chlorella vulgaris)生长过程中的颜色值变化进行监测,同时测定其细胞密度及色素的质量浓度变化并进行相关分析。结果显示,热带普通小球藻生长过程中细胞密度分为接种期、快速生长期、稳定期和衰亡期4个阶段,绿色素和黄色素质量浓度和颜色参数值黄度值(b*)、色差值(△E)和饱和度(c)均呈增加趋势,而颜色参数值明度值(L*)、红度值(a*)、相角(H°)呈降低趋势;颜色参数值与细胞密度、色素质量浓度具有较强的相关性,线性回归模型拟合度较高,在快速生长期尤为显著,其中b*和△E可作为较佳的指示指标。通过量化热带普通小球藻生长过程中的颜色参数变化,建立非接触性数量及质量动态变化预测模型,可快速准确预测,为提高养殖过程中精细操作及效率提供理论基础。

关键词：热带普通小球藻生长过程颜色参数细胞密度色素相关性分析

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Early Failure Detection in Power Transformers

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Journal of Power and Energy Engineering 2013年第5期1卷 30-40页

作者： Luiz Eduardo Borges da Silva Erik Leandro Bonaldi Levy ely de Lacerda de Oliveira Germano Lambert-Torres Giscard F. c. Veloso Ismael Noronha Felipe dos Santos Moreira José Nielze caminha Itajuba Federal University Itajuba Brazil 2PS Solutions Itajuba Brazil 3Termopernambuco Thermal Power Plant Recife Brazil.

This paper presents equipment for early detection of failures in the insulation of power transformers, checking existing partial discharges inside. The equipment involves hardware, control and signal acquisition software, and signal analysis software. This equipment has a set of algorithms that were made with intelligent extraction techniques and interpretation of data. The degradation diagnosis of the equipment insulation is based on digital signal processing algorithms for extraction of features and also in artificial intelligence algorithms that allies a mining involving all the data linked to the equipment throughout its operating life can make an assessment of the operating conditions of the equipment and suggest interventions and provide an estimated time so that they have to be made.

关键词： Transformers Measuring System Signal Processing Partial Discharges Predictive Maintenance

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血清基础c-反应蛋白预测心血管事件发生及预后

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基础医学与临床 2008年第10期28卷 1079-1082页

作者：买买提艾力张抒扬新疆喀什地区第一人民医院心内科新疆喀什844000 北京协和医院心内科北京100005

目的观察血清基础超敏c-反应蛋白(hs-cRP)水平对非冠心病、冠心病患者将来近、远期发生心血管事件及预后的预测价值。方法对327例住院接受冠状动脉造影(cAG)和/或介入治疗(PcI)患者术前测定血清基础hs-cRP水平,将患者分为cRP<0.3 mg/dl(... 详细信息

目的观察血清基础超敏c-反应蛋白(hs-cRP)水平对非冠心病、冠心病患者将来近、远期发生心血管事件及预后的预测价值。方法对327例住院接受冠状动脉造影(cAG)和/或介入治疗(PcI)患者术前测定血清基础hs-cRP水平,将患者分为cRPcRP≥0.3 mg/dl(n=165)两组,分析住院期间、术后1及6个月心血管事件发生率。结果基础血清cRP水平在急性冠脉综合征组比稳定性心绞痛、cAG正常者明显增高(5.15±0.40vs0.27±0.05,0.26±0.35,PcS和cRP水平增高组明显高于SAP和cRP水平不高组(4.86%vs2.44%,PcS和cRP升高组显著高于SAP和cRP低者(12.50%vs6.10%,PcRP水平无论是对PcI术后的冠心病患者,还是非冠心病患者有助于预测将来近、远期发生心血管事件危险及预后的强有力指标。

关键词：超敏c-反应蛋白心血管事件血管成形术经皮冠状动脉

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Brown Algae <i>Himantothallus grandifolius</i>(Desmarestiales, Phaeophyceae) Suppresses Proliferation and Promotes Apoptosis-Mediated cell Death in Tumor cells

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Advances in Biological chemistry 2014年第2期4卷 98-108页

作者： Gabriela Gambato érico G. Baroni charlene S. c. Garcia Rafaele Frassini caroline O. S. Frozza Sidnei Moura cláudio M. P. Pereira Mutue T. Fujii Pio colepicolo Ana Paula F. Lambert Joã o A. P. Henriques Mariana Roesch-ely Botanical Institute SMA S&atilde o Paulo Brazil Faculty of Pharmacy University of Caxias do Sul Caxias do Sul Brazil Institute of chemistry and Geosciences Federal University of Pelotas Pelotas Brazil Institute of chemistry University of S&atilde o Paulo S&atilde o Paulo Brazil Laboratory of Biotechnology of Natural and Synthetic Products Biotechnology Institute University of Caxias do Sul Caxias do Sul Brazil Laboratory of Genomics Proteomics and DNA Repair Biotechnology Institute University of Caxias do Sul Caxias do Sul Brazil

Marine algae have been used as food since ancient times and today are consumed as a regular part of the diet. In this study, we hypothesized that H. grandifolius phlorotannins-enriched extract exerts cytotoxic selective effects against tumor cell lines promoting cell death trough apoptosis mechanisms. The aim of the present study is to characterize chemically and investigate the selective cytotoxic effect of the H. grandifolius extract on epithelial tumour cell lines (A375, A549, Hep-2, HeLa) compared to non-malignant cell line (Hek-293), and evaluate possible molecular mechanisms involved in the programmed cell death pathway. High-resolution directly-infusion mass spectrometry (HR-DIMS) analysis with electrospray ionization (ESI) was performed in positive and negative mode. cytotoxicity was evaluated through colorimetric assay and morphological alterations were observed in giemsa stained cells after extract treatment. Apoptosis was further evaluated by annexin V staining. Spectra showed peaks m/z between 370 and 430 and molecular formula was defined upon isotopic ratio. Extract showed selectivity to the non-tumor line with enhanced cytotoxicity in tumor cells according to the concentration and exposure time. After 72 h treatment, the HeLa strain was more susceptible to the extract, followed by lines Hep2, A375 and A549. Morphological changes by giemsa were observed after increased doses of extracts and staining for annexin V showed majority of tumor cells at early stages of the apoptotic process. Here, selective anti-tumor activity of extract taken from the alga H. grandifolius was able to suppress proliferation and promote apoptosis-mediated cell death with induction of initial stages of apoptosis in different cell lines.

关键词： Algae cytotoxicity Apoptosis cancer in Vitro

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chemical characterization and cytotoxic Activity of Antarctic Macroalgae Extracts against colorectal cancer

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Advances in Biological chemistry 2019年第5期9卷 167-177页

作者： Rafaele Frassini Yeslei Paulino da Silva Sidnei Moura Leonardo Zambotti Villela Aline Paternostro Martins Pio colepicolo Mutue Toyota Fujii Nair S.Yokoya claudio Martin Pereira de Pereira Vagner Reinaldo Zingalli Bueno Pereira Joao Antonio Pegas Henriques Mariana Roesch-ely Laboratory of Genomics Proteomics and DNA RepairUniversity of Caxias do SulCaxias do SulRSBrazil Laboratory of Biosynthetic and Natural Products of caxias do Sul Caxias do SulRSBrazil Laboratory of Biochemistry and Molecular Biology of Algae University of Sao PauloSao PauloSPBrazil Phycologycal Research Institute of BotanySao PauloSPBrazil Laboratory of Lipidomics and Biorganic—LLipidomicaBio Federal University of PelotasPelotasRSBrazil General Hospital University of Caxias do SulCaxias do SulRSBrazil

Background/Aim: Antarctic seaweeds are considered a promising source of compounds with anticancer activity. colorectal cancer (cRc) is one of the most incident cancers with high mortality rates worldwide. This work aimed to characterize chemically extracts of the Antarctic macroalgae Iridaea cordata, cystosphaera jacquinotii and Desmarestia anceps and to evaluate the cytotoxic effects against human colon cancer HcT 116 cell line. Materials and Methods: The extracts were obtained by depletion using an ultrasound probe and were identified by High-Performance Liquid chromatography (HPLc) and Gas chromatography coupled with Mass Spectrometry (Gc-MS). cell viability was determined by MTT assay. Results: Hexanic and chloroform extracts of the I. cordata and the hexanic, chloroform and methanolic extracts of D. anceps were able to inhibit growth of colorectal cancer cells in the three different incubation times (24, 48 and 72 h). Through Gc analysis, 01 compounds were identified in the hexane extract and 02 compounds in the chloroform extract of the algae I. cordata. The hexane extract of D. anceps macroalgae presented 5 compounds, chloroform extract 10 and methanolic extract 3 respectively, with special highlight to fucosterol. carotenoid analysis by HPLc identified β-carotene in all species, while zeaxanthin was present in the spectrum of I. cordata and c. jacquinotii. Fucoxanthin and violaxanthin were confirmed in the brown seaweeds c. jacquinotii and D. anceps. conclusion: Extracts of macroalgae I. cordata and D. anceps may be a source of therapeutic agents against cRc.

关键词： Antarctic Seaweeds Antitumor Activity colorectal cancer

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维吾尔药材驱虫斑鸠菊质量标准研究

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中国民族医药杂志 2015年第4期21卷 44-46页

作者：阿不都瓦尔.阿布拉克沙拉麦提.艾力王亚丽新疆维吾尔自治区维吾尔医医院新疆乌鲁木齐830049 新疆维吾尔自治区食品药品检验所新疆乌鲁木齐830004

目的：建立维医常用药材驱虫斑鸠菊的质量标准。方法：采用TLc法对绿原酸进行定性鉴别。采用HPLc法，Agilent ZORBAXSB—c18（4．6mm×150mm，5μm），以乙腈为流动相A，以0．2％磷酸为流动相B，进行梯度洗脱；流速：1．0mL·min^-1，... 详细信息

目的：建立维医常用药材驱虫斑鸠菊的质量标准。方法：采用TLc法对绿原酸进行定性鉴别。采用HPLc法，Agilent ZORBAXSB—c18（4．6mm×150mm，5μm），以乙腈为流动相A，以0．2％磷酸为流动相B，进行梯度洗脱；流速：1．0mL·min^-1，检测波长为327nm，柱温：30℃，测定驱虫斑鸠菊中绿原酸的含量。结果：TLc鉴别专属性强，分离效果好。绿原酸在1．218～91．350μg·L^-1范围内，有良好的线性关系（r^2=0．9999），平均回收率为102．5％（n=9），RSD％为1．25％。结论：该方法简便、准确、重现性好，可作为驱虫斑鸠菊药材的质量控制方法。

关键词：驱虫斑鸠菊绿原酸薄层色谱法高效液相色谱法

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Improved measurement of electron antineutrino disappearance at Daya Bay

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chinese Physics c 2013年第1期37卷 1-20页

作者：安丰鹏安琪白景芝 A.B.Balantekin H.R.Band W.Beriguete M.Bishai S.Blyth R.L.Brown 曹国富曹俊 R.carr W.T.chan 常劲帆 Y.chang c.chasman 陈和生 H.Y.chen 陈申见陈少敏陈潇聪陈晓辉陈晓苏陈羽陈义学 J.J.cherwinka 朱明中 J.P.cummings 邓子艳丁雅韵 M.V.Diwan E.Draeger 杜小峰 D.Dwyer W.R.Edwards S.R.ely 方绍东付金煜付在伟葛良全 R.L.Gi11 M.Gonchar 龚光华宫辉 Y.A.Gornushkin 顾文强关梦云郭新恒 R.W.Hackenburg R.L.Hahn S.Hans 郝慧峰何苗贺青 K.M.Heeger 衡月昆 P.Hinrichs Y.K.Hor Y.B.Hsiung B.z.Hu 胡涛黄翰雄 H.z.Huang 黄性涛 P.Huber V.Issakov z.Isvan D.E.Jaffe S.Jetter 季筱璐季向盼姜海静焦健斌 R.A.Johnson 康丽 S.H.Kettell M.Kramer 关健强郭文伟郭人能 c.Y.Lai 赖万昌 W.H.Lai K.Lau L.Lebanowski J.Lee 雷瑞霆 R.Leitner 梁干庄梁嘉怡 c.A.Lewis 李飞李高嵩李秋菊李卫东李小波李小男李学潜李仪李志斌梁昊林政儒 c.L.Lin S.K.Lin 林延畅凌家杰 J.M.Link L.Littenberg B.R.Littlejohn D.W.Liu 刘金昌刘江来刘颖彪陆昌国路浩奇陆永康 K.B.Luk 马秋梅马续波马骁妍马宇蒨 K.T.McDonald M.c.McFarlane R.D.McKeown Y.Meng D.Mohapatra Y.Nakajima J.Napolitano D.Naumov I.Nemchenok 倪浩然 W.K.Ngai 聂阳波宁哲 J.P.Ochoa-Ricoux A.Olshevski S.Patton V.Pec J.c.Peng L.E.Piilonen L.Pinsky 潘振声齐法制祁鸣钱鑫 N.Raper 任杰 R.Rosero B.Roskovec 阮锡超邵贝贝师恺 H.Steiner 孙功星孙吉良 N.Tagg 谭耀豪 H.K.Tanaka 唐晓 H.Themann Y.Torun S.Trentalange O.Tsai K.V.Tsang R.H.M.Tsang c.E.Tull Y.c.Tung B.Viren V.Vorobe1 c.H.Wang 王灵淑王玲玉王龙泽王萌王乃彦王瑞光 W.Wang 王玺王贻芳王喆王铮王志民 D.M.Webber 魏瀚宇魏亚东温良剑 K.Whisnant c.G.White L.Whitehead Y.Williamson T.Wise H.L.H.Wong E.T.Worcester F.F.Wu 吴群习建博夏冬梅邢志忠徐建一徐晶徐吉磊徐晔薛涛杨长根杨雷叶梅 M.Yeh Y.S.Yeh B.L.Young 于泽源占亮 c.Zhang 章飞虹张家文张清民张书华张一纯张银鸿张一心张志坚张子平张智勇赵洁赵庆旺赵豫斌郑磊钟玮丽周莉周祖英庄红林邹佳恒 Institute of High Energy Physics Chinese Academy of Sciences University of Science and Technology of china University of Wisconsin Brookhaven National Laboratory National United University california Institute of Technology Nanjing University Department of Engineering Physics Tsinghua University chinese University of Hong Kong Shenzhen Univeristy North china Electric Power University Siena college Department of Physics Illinois Institute of Technology Lawrence Berkeley National Laboratory Department of Physics University of California Department of Physics University of Illinois at Urbana-Champaign chengdu University of Technology Joint Institute for Nuclear Research Shanghai Jiao Tong University Beijing Normal University Joseph Henry Laboratories Princeton University center for Neutrino Physics Virginia Tech Department of Physics National Taiwan University Institute of Physics National Chiao-Tung University china Institute of Atomic Energy University of california Shandong University School of Physics Nankai University University of cincinnati Dongguan University of Technology Department of Physics The University of Hong Kong Department of Physics University of Houston charles University Faculty of Mathematics and Physics Sun Yat-Sen(Zhongshan)University college of William and Mary Rensselaer Polytechnic Institute china Guangdong Nuclear Power Group Iowa State University Xi'an Jiaotong University

We report an improved measurement of the neutrino mixing angle θ13 from the Daya Bay Reactor Neutrino Experiment. We exclude a zero value for sin22θ13 with a significance of 7.7 standard deviations. Electron antineutrinos from six reactors of 2.9 GWm th were detected in six antineutrino detectors deployed in two near （flux-weighted baselines of 470 m and 576 m） and one far （1648 m） underground experimental halls. Using 139 days of data, 28909 （205308） electron antineutrino candidates were detected at the far hall （near halls）. The ratio of the observed to the expected number of antineutrinos assuming no oscillations at the far hall is 0.944± 0.007（stat.） ± 0.003（syst.）. An analysis of the relative rates in six detectors finds sin22θ13=0.089± 0.010（stat.）±0.005（syst.） in a three-neutrino framework.

关键词： neutrino oscillation neutrino mixing reactor Daya Bay

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