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Synthesis,Structural and photophysical properties of Gd_(2)O_(3):Eu^(3+)Nanostructures prepared by a Microwave Sintering process

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Advances in chemical engineering and Sc.ence 2014年第3期4卷 374-388页

作者： Ana p.de Moura larissa H.Oliveira Icamira c.Nogueira paula F.S.pereira Maximo S.li Elson longo Jose A.Varela Ieda l.V.Rosa chemistry Institute State University of Sao Paulo-UNESPAraraquaraBrazil Department of engineering Materials Federal University of Sao CarlosSao CarlosBrazil Institute of physics of Sao carlos USPSao CarlosBrazil Department of chemistry Federal University of Sao CarlosSao CarlosBrazil

In this paper, we report the obtention of gadolinium oxide doped with europium (Gd2O3:Eu+3) by thermal decomposition of the Gd(OH)3:Eu3+ precursor prepared by the microwave assisted hydrothermal method. These systems were analyzed by thermalgravimetric analyses (TGA/DTA), X-ray diffraction (XRD), structural Rietveld refinement method, fourrier transmission infrared absorbance spectroscopy (FT-IR), field emission scanning electron microscopy (FE-SEM) and photoluminescence (pl) measurement. XRD patterns, Rietveld refinement analysis and FT-IR confirmed that the Gd(OH)3:Eu3+ precursor crystallize in a hexagonal structure and space group p6/m, while the Gd2O3:Eu3+ powders annealed in range of 500°c and 700°c crystallized in a cubic structure with space group Ia-3. FE-SEM images showed that Gd(OH)3:Eu3+ precursor and Gd2O3:Eu3+ are composed by aggregated and polydispersed particles structured as nanorods-like morphology. The excitation spectra consisted of an intense broad band with a maximum at 263 nm and the Eu3+ ions can be excitated via matrix. The emission spectra presented the characteristics transitions of the Eu3+ ion, whose main emission, , is observed at 612 nm. The photophysical properties indicated that the microwave sintering treatment favored the Eu3+ ions connected to the O-Gd linkages in the Gd2O3 matrix. Also, the emission in the Gd2O3:Eu3+ comes from the energy transfered from the Gd-O linkages to the clusters in the crystalline structure.

关键词： Gadolinuim Oxide Europium luminescence Nanorods

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云南咖啡锈菌小种鉴定

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热带作物学报 2018年第9期39卷 1800-1806页

作者：白学慧 V M p VáRZEA 郭铁英 M c SIlVA 张洪波李锦红云南省德宏热带农业科学研究所云南瑞丽678600 centro de Investigacao das Ferrugens do cafeeiro/linking landscape EnvironmentAgriculture and Food Instituto Superior de Agronomia/Universidade de LisboaOeiras 2784-505Portugal

为明确云南咖啡锈菌小种类型,采用国际通用的19个咖啡锈菌生理小种鉴定寄主,利用人工接种鉴定的方法,对采自云南咖啡主产区12县(市)的51份咖啡锈菌进行鉴定,鉴定出9个小种,分别为VIII(v2,3,5)、XXXIII(v5,7 or v5,7,9)、XXXIV(v2,5,7 or... 详细信息

为明确云南咖啡锈菌小种类型,采用国际通用的19个咖啡锈菌生理小种鉴定寄主,利用人工接种鉴定的方法,对采自云南咖啡主产区12县(市)的51份咖啡锈菌进行鉴定,鉴定出9个小种,分别为VIII(v2,3,5)、XXXIII(v5,7 or v5,7,9)、XXXIV(v2,5,7 or v2,5,7,9)、XXXVII(v2,5,6,7,9)、XlI(v2,5,8)、XlII(v2,5,7,8 or v2,5,7,8,9)、New race(v2,5,6,7)、New race(v1,2,5,7 or v1,2,5,7,9)、New race(v1,5,7 or v1,5,7,9),这9个小种均为国内首次鉴定,其中小种XXXIII、XXXIV、New race(v2,5,6,7)、New race(v1,5,7 or v1,5,7,9)、New race(v1,2,5,7 or v1,2,5,7,9)、XlI和XlII均侵染catimor7963,小种XXXVII侵染catimorT5175。

关键词：咖啡锈菌小种小种鉴定云南

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SYNTHESES AND SpEcTRA OF HETEROpOlY BlUES OF DOUBlE 2:17 MOlYBDOpHOSpHATES lANTHANIDE cOMplEXES

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chinese chemical letters 1991年第11期2卷 877-880页

作者： en Bo WANG ※, lan cui ZHANG, Zuo ping WANG, en Hong SHen, Su Xia ZHANG Department of chemistry, Northeast Normal University, changchun 130024 Rui Yun 2HAN, Ya Yan lIU chanochun Institute of Applied chemistry, Academia Sinica, changchun 130022

The present paper reports eight heteropoty blues of double 2:17 motybdophosphates tanthanide comptexes with tacunary Dawson structure, i.e., K_(17)H_2[ln(p_2Mo_2~ⅤMo_(15)~ⅥO_(16))_2], nH_2O and K_(17)H_4 [ln(p_2Mo~Ⅴ_4Mo_(13)~ⅥO_(61))_2], nH_2O(ln=la, pr, Sm, Yb). They were characterized by etementat anatyses, potentiometric titration, IR, UV, potarography, cyclic vottammetry, X-ray photoelectron spectra, X-ray powder diffraction, thermat analyses and ESR. The results show that the properties of these heteropoty btues are different from those of heteropoty blues with saturated Dawson structure and other tacunary series. They are more stabte than their parent heteropoty acids in aqueous sotution and have the abitity of anti-base decomposition.

关键词： la SYNTHESES AND SpEcTRA OF HETEROpOlY BlUES OF DOUBlE 2 ESR 公吏 ScE

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Ag, Hg and cr precipitation for Recycling Derived of Hazardous liquid Waste

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Green and Sustainable chemistry 2013年第2期3卷 37-42页

作者： Silvia c. Gutiérrez-Gutiérrez Genoveva Rosano-Ortega carlos Vega-lebrún Juan Manuel lópez pedro ávila-pérez Sonia M. Martínez Gallegos Daniel cruz González chemical engineering Faculty Benemérita Universidad Autónoma de Puebla Puebla México Division of Graduate Studies and Research Instituto Tecnológico de Toluca Toluca México Research Department Universidad Popular Autónoma del Estado de Puebla (UPAEP) Puebla México Technological Research División Instituto Nacional de Investigaciones Nucleares Ocoyoacac México

production of different compounds can generate large amounts of hazardous wastes which are dangerous to the environment and human health. The disposal or treatment of hazardous liquid waste rich in heavy metals like silver (Ag), mercury (Hg) and chromium (cr) is difficult due to the strong acidity and toxicity which usually present in these contaminants. For this study, several research works were reviewed in order to obtain an effic.ent and viable treatment in time and removal effic.ency. A series of chemical precipitations were evaluated for effic.ency in the reduction of heavy metals in liquid waste. The precipitation of all three metals lasted 30 minutes and after treatment the wastewater presented concentrations of 0.064 mg·l-1 Ag, 0.010 mg·l-1 Hg and 0.048 mg·l-1 cr, with a standard pH (7.5-8.5);with removal effic.encies of 94.31% for Ag, 99.99% for Hg and 98.17% for cr.

关键词： Hazardous liquid Waste Treatment for Recycling Silver Mercury chromium

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circulating tumor cells in head and neck cancer:A review

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World Journal of Otorhinolaryngology-Head and Neck Surgery 2016年第2期2卷 -页

作者： Kyle p. McMullen Jeffrey J. chalmers Jas c. lang pawan Kumar Kris R. Jatana Department of 0tolaryngology-Head and Neck Surgery Wexner Medical Center at 0hio State University Columbus 0H USA William G. lowrie Department of chemical and Biomolecular engineering 0hio State University Columbus 0H USA

carcinoma of the head and neck represents 3.5%of all cancers, and the vast major-ity of these tumors are squamous cell carcinoma (HNScc). With a stable overall survival rate of 50%among all stages, there is continued interested in developing measures for early detection and disease aggressiveness. circulating tumor cells (cTcs) have been identified as a potential marker for early metastatic disease, response to treatment, and surveillance in head and neck squamous cell carcinoma. In this article, techniques of cTc detection, applications of cTc technology, and outcomes of HNScc patients will be discussed. copyright a 2016 chinese Medical Association. production and hosting by Elsevier B.V. on behalf of KeAi communications co., ltd. This is an open access article under the cc BY-Nc-ND license (http://***/licenses/by-nc-nd/4.0/).

关键词： circulating tumor cell Metastasis Head and neck cancer Squamous cell

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critical mechanical properties and FEA simulation for crashworthiness assessment of a coarse-grained cast AM50 alloy

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Journal of Magnesium and Alloys 2015年第3期3卷 188-196页

作者： S.Xu c.H.M.Simha M.Gesing J.liang J.lo canmetMATERIAlS Natural Resources Canada183 Longwood Rd SHamiltonOntario L8P 0A5Canada

A coarse-grained AM50 alloy was used as a model alloy for investigation of constitutive behaviour,charpy toughness and effect of stress state on deformation and failure of cast Mg *** results provide critical mechanical properties of a cast AM50 alloy for crashworthiness assessment and development of finite element simulation *** cast Mg alloys,the effect of strain rate and temperature is larger on tensile strength than on compressive strength because twinning is more extensive in compression than in *** effect of strain rate on compressive strength is negligible because twinning activity of the cast Mg alloy is *** load *** of charpy specimens were measured for modelling,and the effect of loading rate and temperature on load of charpy specimens is very small because part of the specimen is in *** equivalent strain to fracture of the cylindrical round notched tension specimen decreases with increasing stress triaxiality;though for the flat-grooved plane strain specimen,the equivalent fracture strain remains constant over the range of stress triaxiality *** the two different specimen geometries give rise to different lode angle values,the test results show that the lode angle parameter is an important parameter for deformation and fracture of Mg *** element simulations of loading of the cylindrical notched-tension and charpy specimens were carried out using a lode-angle dependent von Mises model,and were found to provide a reasonable description of the load-displacement curves measured in the *** the flat-grooved plane strain specimens,the computations under-predicted the force-displacement response measured.

关键词： Effect of strain rate and temperature Tensile and compressive crash Simulation AM50

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Assessing the Malignancy of Hepataocellular carcinoma in cirrhosis Using the Hepatocellular contrast Agent Gd-EOB-DTpA and correlation with the cytometric DNA Index

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Advances in Molecular Imaging 2013年第1期3卷 1-7页

作者： R.Rottgen S.Kobi c.Grieser F.Streitparth H.Al-Abadi A.Duerr W.Faber J.pratschke p.Neuhaus B.Hamm l.ludemann Klinik fur Radiologie Charite’Campus Virchow Augustenburger Platz 1BerlinGermany Klinik fur Allgemein-Visceral-und Transplantationschirurgie Charite’Campus Virchow Augustenburger Platz 1BerlinGermany Klinik fur Visceral- Transplantations-und ThoraxchirurgieUniversitatsklinikum InnsbruckInnsbruckAustria Abteilung fur Strahlenphysik Universitatsklinikum EssenEssenGermany

Aim: Investigation whether the signal intensity of hepatocellular carcinoma (Hcc) on dynamic magnetic resonance imaging (MRI) with hepatocellular contrast medium (cM) correlates with the histologic malignancy grade and cytometric DNA index. Material and Methods: MRI at 1.5 T with hepatocellular cM Gd-DTpA-EOB of 63 patients (52 men, 11 women;64.0 ± 8.5 years) with Hcc in cirrhosis. SI of the tumor and liver tissue in sequences (T1, T1fs, T2fs, T1fs + cM (arterial, venous, late venous phase) were correlated like the asymmetry coeffic.ent of the SI in the arterial and venous phases respective the native and late venous phases of the tumor with the histologic malignancy grade and DNA index indicating the grade of abnormal DNA steam line respective aneuploid DNA. Results: SI did not significantly correlate with the histologic malignancy grade or DNA index for precontrast or postcontrast images. There is a significant correlation for the asymmetry coeffic.ent of the SI in the arterial and venous phases with the DNA-index (p values of 0.00089 (pearson) and 0.0082 (Spearman). conclusion: A highly arterialized hepatocellular carcinoma with rapid washout in the venous phase corresponds to a higher malignant potential. These findings suggest that the MR parameters investigated here may predict the malignant potential and prognosis of Hcc before surgery.

关键词： Hepatocellular carcinoma DNA Index DNA cytometry Malignancy Grading

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An Analytical Analysis of Relaxation States in Toroidal plasma with a coaxial Helicity Injection

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中国核科技报告 1999年第S4期 387-388页

作者： D.Zhou c.Zhang Institute of plasma physics chinese Academy of Sc.ence p.O.Box 1126 Hefei 230031 p.R.china

The Euler-lagrange equations are derived from the principle of minimum dissipation to represent the relaxation state in toroidal plasma with a coaxial helicity

关键词： An Analytical Analysis of Relaxation States in Toroidal plasma with a coaxial Helicity Injection

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隐性感染的HBV具有致癌性

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中国处方药 2004年第9期3卷 28-29页

作者： Teresa p Giovanni S Giovanni c Irene c 王小艳

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^(11)c-蛋氨酸pET显像诊断胶质瘤的价值

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中华核医学杂志 2003年第2期23卷 75-76页

作者：邵虹 Trampal c 吴靖川上海第二医科大学附属新华医院儿童医学中心影像诊断中心 200127 瑞典乌普萨拉大学pET中心上海第二医科大学附属新华医院儿童医学中心核医学科 200127

目的　评价1 1 c 蛋氨酸 (MET)pET显像诊断胶质瘤及鉴别良恶性胶质瘤的价值。方法2 2例经病理检查证实的不同分级胶质瘤患者行1 1 c METpET显像 ,对病灶进行定量分析。结果　 2 2例患者的瘤组织均有明显1 1 c MET摄取且与周围正常组织... 详细信息

目的　评价1 1 c 蛋氨酸 (MET)pET显像诊断胶质瘤及鉴别良恶性胶质瘤的价值。方法2 2例经病理检查证实的不同分级胶质瘤患者行1 1 c METpET显像 ,对病灶进行定量分析。结果　 2 2例患者的瘤组织均有明显1 1 c MET摄取且与周围正常组织分界清晰 ,Ⅰ～Ⅱ级胶质瘤热点计数与对侧相同部位 (HS cA)放射性比值为 1 .57± 0 .2 8,明显低于Ⅲ～Ⅳ级胶质瘤 (3 .0 6± 0 .47,t=6 .48,p p cA比值差异无显著性 (t=1 .85 ,p >0 .0 5)。结论　1 1 c METpET显像有助于鉴别诊断不同分级的胶质瘤。

关键词： ^11c-蛋氨酸 pET显像诊断胶质瘤碳放射性同位素

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