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Sample records for plasticity xilin lu

  1. The Status and Evaluation of Main Soil Nutrients in Xilin Gol Grassland

    Institute of Scientific and Technical Information of China (English)

    Jiguang; SHI

    2014-01-01

    To reveal the soil nutrient contents of Xilin Gol Prairie,practical data on the main soil nutrient contents from 2006 to 2011 were statistically analyzed and integrated evaluation of soil nutrients was finished on principal component theory. The result showed that the soil nutrients of Xilin Gol Grassland were mainly organic matter,the content of total N,total P and total K were 22. 444 g / kg,1. 047 g / kg,0. 371 g /kg and 23 g / kg respectively,and the degree of variation of each other was moderate except total K’s little variability. The contents of soil nutrients were in the moderate level,in which contents of organic matter and total N were in the moderate level( Level 3),content of total P was low level( Level 5),and the content of was much high level( Level 2). The regional integrated evaluation showing that the soil nutrients of Xilinhot was the highest level and Erenhot was the lowest level; the meadow steppe was the highest following by the typical grassland and the grassland as desertification was the lowest,provided a theoretical basis for promoting the restoration of farmland to forest and pasture and the development of animal husbandry and improving the grassland productivity and reasonable utilization of grassland resources.

  2. Characterization of land cover types in Xilin River Basion using multi—temporal Landsat images

    Institute of Scientific and Technical Information of China (English)

    CHENSiqing; LIUJiyuan; ZHUANGDafang; XIAOXiangming

    2003-01-01

    This study conducted computer-aided image analysis of land use and land cover in Xilin River Basin ,Inner Mongolia,using 4 sets of Landsat TM/ETM+images acquired on July 31,1987,August 11,1991,September 27,1997 and May 23,2000,respectively,Primarity,17 sub-class land cover types were recognized ,including nine grassland types at community level: F.sibiricum steppe, S.baicalensis steppe,A.chinensis+forbs steppe.A.chinensis+bunchgrass steppe,A.chinensis+Ar.frigida steppe,S.grandis +A.chinensis steppe,S.grandis+bunchgrass steppe,S.krylavii steppe, Ar.frigida steppe and eight non-grassland types:active cropland,harvested cropland,urban area, wetland,desertified land ,saline and aalkaline land,cloud ,water body+clound shadow.To eliminate the classification error exsting among different sub-types of the same gross type ,the 17 sub-class land cover types were groped into five gross types:meadow grassland,tmeperate grassland ,desert grassland,cropland and non-grassland,The overall callssifcation accuracy of the five land cover types was 81.0% for 1987,81.7%for 1991,80.1% for 1997 and 78.2% for 2000.

  3. SHRIMP U-Pb zircon geochronology and its implications on the Xilin Gol Complex, Inner Mongolia, China

    Institute of Scientific and Technical Information of China (English)

    SHI Guanghai; LIU Dunyi; ZHANG Fuqin; JIAN Ping; MIAO Laicheng; SHI Yuruo; TAO Hua

    2003-01-01

    The Xilin Gol Complex, consisting of deformed and metamorphosed rocks, was exposed as a large geological unit within the Central Asian Orogenic Belt, but its forming and subsequent deformed and metamorphic time has been an issue of little consensus. Petrographic analyses and SHRIMP dating on biotite-plagioclase gneiss, one of the major rocks within the Xilin Gol Complex, in southeast Xilinhot City, Inner Mongolia, China, where the Xilin Gol Complex was identified and named, yield its lower limit age of 437 ( 3 Ma (2--) by its magmatic zircon SHRIMP U-Pb dating, and an upper limit age of 316 ( 3Ma (2--), which was constrained by SHRIMP dating of magmatic zircons from adjacent undeformed garnet-bearing granite which intruded the Complex. The Complex was thus determined to be formed and subsequently deformed/metamorphosed from the late Ordovician-early Silurian to the mid-Carboniferous. Consequently, it is not the Precambrian terrane as previously considered by most geologists. More or less, the major rock--biotite- plagioclase gneiss within the Complex is more likely to be Paleozoic fore-arc turbidite formation before metamorphism and intensive deformation, in which the detrital zircons gave sporadic Precambrian ages as old as up to 3.1 Ga. The source of the turbidite formation is multiple, which may be derived either from the North China Craton, or from the South- Mongolia Micro-continent, or probably came from a potential and undiscovered in situ terranes aged 600-800 Ma or even up to ca 3.1 Ga near the Complex.

  4. Comparison of carbon sequestration ability and effect of elevation in fenced wetland communities of the Xilin River floodplains: a model case study.

    NARCIS (Netherlands)

    Liu, Y.; Wang, L.; Liu, H.; Wang, W.; Liang, C.; Yang, J.; Verhoeven, Jos

    2014-01-01

    Floodplain habitats of the Xilin River in Inner Mongolia, China, were overgrazed by sheep and cattle until fencing of the floodplains was implemented in 2000. Carbon cycling of three plant communities of differing floodplain elevation after fencing showed that biomass in low-elevation wetlands incre

  5. Climate Factors Analysis of the Desertification in Xilin Gol Grassland%锡林郭勒草原荒漠化气候因素分析

    Institute of Scientific and Technical Information of China (English)

    马清霞; 王星晨; 高志国

    2011-01-01

    Make use of the meteorological data of years,season,month amount of precipitation , the average temperatures , sand storm days from 1961 to 2006 on Xilin Gol grassland. Specifically analyzes the present situation of the desertification on the Xilin Gol grassland. Research in climate warming background , studies the reasons and rules which caused the drought on the Xilin Gol grassland, analyzes the influence caused by it to the desertification on the Xilin Gol grassland, obtains the following conclusion : 1. The Xilin Gol grassland desertification is serious, the desertification area is situated the first in Inner Mongolia Autonomous Region, the desertification area is situated the second in Inner Mongolia Autonomous Region. 2. The tendency of the precipitation in spring and summer has the accurate 25a climate vibration on the Xilin Gol grassland, the characteristic of the age border change is quite prominent. There is high frequency of drought. 3. The climate warming brings the tremendous influence on the Xilin Gol grassland. 4. The high frequency of the sand storm and the drought influence each other. Meanwhile that has certain influence on the pasture ecology resources the Xilin Gol grassland. 5. The ecological environment worsens, causes the lose of the massive area land resource and the living resources. The worsened ecological environment has already affected the social economy development in Xilin Gol grassland.%利用1961-2006年锡林郭勒草原年、季、月降水量、平均气温、沙尘暴日数等气象资料,针对锡林郭勒草原荒漠化的现状进行分析。在气候变暖背景下,研究锡林郭勒草原干旱发生的规律及其成因,分析其带给锡林郭勒草原荒漠化的影响,得到以下结论:1.锡林郭勒草原沙化、荒漠化严重,沙化面积位居内蒙古自治区第一,荒漠化面积位居内蒙古自治区第二。2.锡林郭勒草原春夏季降水趋势存在准25a气候振动,年代际变

  6. [Interannual variation patterns of heavy metals concentrations in tree rings of Larix gmelinii near Xilin Lead-zinc Mine, Yichun of Northeast China].

    Science.gov (United States)

    Hu, Shen; Wang, Xiao-Chun; Yang, Jin-Yan

    2013-06-01

    By using dendro-environmental methods, this paper measured and analyzed the variations of five heavy metals (Pb, Cd, Zn, Cu, and Mn) concentrations in the tree rings of Larix gmelinii near Xilin Lead-zinc Mine, Yichun of Northeast China. Among the test heavy metals, the Mn concentration in the tree rings was the highest, while the Cd concentration was the lowest. The Cd, Zn, and Cu concentrations in the tree rings near the ground (0.3 m high from the ground, D0.3) were significantly higher than those at breast height (1.3 m high from the ground, D1.3), while the Pb and Mn concentrations at the two heights had less difference. In 1987-2010, the Pb concentration in the tree rings had a slight increase, but the Cd, Zn, Cu, and Mn concentrations presented a decreasing trend. The Cd concentration decreased most obviously, while the Zn, Cu, and Mn concentrations decreased after an initial increase. With the increase of tree ring width, the Pb concentration decreased, while the Cd, Zn, Cu, and Mn concentrations were in adverse. The relationships between the Pb and other four heavy metals concentrations in the tree rings near the ground and at breast height had definite differences. Near the ground, the Pb concentration showed a significant positive correlation with the other four heavy metals concentrations, but at breast height, less correlation was observed, and even, the Cd concentration decreased significantly with increasing Pb concentration. The variations of the heavy metals concentrations in the L. gmelinii tree rings could be affected by the production and mining activities of Xilin Lead-zinc Mine, an thus, it would be possible to use the Pb concentration in the tree rings to reconstruct the mining his tory of the study area. At present, the Pb concentration in the tailing wastes has polluted the surrounding environments near Xilin Lead-zinc Mine. Therefore, countermeasures should be adopted to manage the heavy metals in tailing wastes if the Mine would be

  7. The MueLu Tutorial

    Energy Technology Data Exchange (ETDEWEB)

    Hu, Jonathan Joseph [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Wiesner, Tobias A. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Prokopenko, Andrey [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Gee, Michael [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2014-10-01

    The MueLu tutorial is written as a hands-on tutorial for MueLu, the next generation multigrid framework in Trilinos. It covers the whole spectrum from absolute beginners’ topics to expert level. Since the focus of this tutorial is on practical and technical aspects of multigrid methods in general and MueLu in particular, the reader is expected to have a basic understanding of multigrid methods and its general underlying concepts. Please refer to multigrid textbooks (e.g. [1]) for the theoretical background.

  8. Level structure of 159Lu

    Institute of Scientific and Technical Information of China (English)

    SHENG Hai-Qing; ZHAI Jian; LI Xian-Feng; MA Ying-Jun; ZHAO Yan-Xin; WANG Ya-Kun; ZHAO Lei; ZHU Li-Hua; WU Xiao-Guang; HE Chuang-Ye; LIU Yin; HAO Xin; LI Xue-Qin

    2009-01-01

    The high-spin states of 159Lu were populated by fusion-evaporation reaction 144Sm (19F, 4n) with beam energy 106 MeV. A new level scheme was established, which consists of the yrast band with negative parity, the octupole vibration band based on the states and quasipartical band with positive parity. The high spin states of 159Lu were discussed by systemic characteristics.

  9. Income and Expenditure of the Herdsman in Inner Mongolia Autonomous Region: A Case Study of Xianghuang Banner in Xilin Gol League

    Institute of Scientific and Technical Information of China (English)

    LI Peng; YANG Ting-ting; SHI Hong-xiao; WU Xin-hong; Qin Yan

    2012-01-01

    Based on the household survey data concerning herdsmen’s families in Xianghuang Banner, Xilin Gol League, Inner Mongolia, we analyze the income and consumption structure of herdsmen’s families in the western regions during the period 2008-2009. The results show that the herdsman’s source of income is single, mainly focusing on livestock sale, with poor ability to resist risks; the share of purchase expenses of forage in the consumer spending is the greatest, growing rapidly, followed by spending on food, education and health care; there are many policy subsidies for housing. The characteristics of herdsman’s income and consumption are jointly determined by natural factors, market factors, policy factors and personal factors. Based on this, corresponding recommendations are put forth in order to increase herdsman’s income and improve the consumption structure: the herdsman should strengthen breeding techniques to improve scientific breeding and increase income, change consumer attitudes, save moderately, and strengthen ability to resist risks; the government should increase the policy subsidies for pastoral areas, strengthen education, training, health care for herdsman, and promote herdsman’s quality.

  10. LU Peizhang receives Golay Award

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    @@ Prof. LU Peizhang, an analytical chemist with the CAS Dalian Institute of Chemical Physics, received the prestigious Golay Award at the 30th International Symposium on Capillary Chromatography opened on 5 June in Dalian, a port city in northeast China's Liaoning Province.

  11. Ying La or Ying Lu?

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    <正>As a new star in politics of Thailand,Yingluck Shinawatra has never thought that a dispute about her Chinese name is occurring in a Chinese speaking country--China,when people come to focus on her familY background,new deal,and her tomorrow.Media reporters and editors are wavering between"Ying La"and"Ying Lu".

  12. Hexagonal LuMnO3 revisited

    NARCIS (Netherlands)

    Aken, Bas B. van; Meetsma, Auke; Palstra, Thomas T.M.

    2001-01-01

    The crystal structure of hexagonal LuMnO3 at room temperature is isomorphous with YMnO3 and deviates in important details from early work. Mn is near the centre of its oxygen coordination environment. On the threefold axes, the apical O-Lu bonds have alternating long and short bond lengths, leading

  13. Plastic Surgery

    Science.gov (United States)

    ... Surgery? A Week of Healthy Breakfasts Shyness Plastic Surgery KidsHealth > For Teens > Plastic Surgery Print A A ... forehead lightened with a laser? What Is Plastic Surgery? Just because the name includes the word "plastic" ...

  14. 呼伦贝尔-锡林郭勒大草原土壤中的暗色丝孢菌%Soil dematiaceous hyphomycetes from Hulunbuir and Xilin Gol Steppe,Inner Mongolia,China

    Institute of Scientific and Technical Information of China (English)

    吴悦明; 张天宇

    2008-01-01

    A total of 59 isolates of soil dematiaceous hyphomycetes belonging to 28 species in 16 genera were obtained from Hulunbuir and Xilin Gol Steppe.Scolecobasidium tuberculosum is a new species morphologically resembling S.constrictum but having conspicuously tuberculate and dark brown conidia.Latin diagnosis is given for the new species.Cordana pauciseptata,Doratomyces columnaris,Bipolaris indica,Periconia jabalpurensis and Trichocladium opacum are new to Chinese fungal flora,and brief descriptions and illustrations of them are also provided based on Chinese isolates.The other 22 species previously known from China are also listed.All studied specimens(dried cultures)and living cultures are deposited in the Herbarium of Plant Pathology,Shandong Agricultural University(HSAUP).

  15. THE LU ISOTOPIC COMPOSITION OF ACHONDRITES: CLOSING THE CASE FOR ACCELERATED DECAY OF {sup 176}LU

    Energy Technology Data Exchange (ETDEWEB)

    Wimpenny, Josh; Yin, Qing-zhu [Department of Earth and Planetary Sciences, University of California, One Shields Avenue, Davis, CA 95616 (United States); Amelin, Yuri, E-mail: jbwimpenny@ucdavis.edu [Research School of Earth Sciences, The Australian National University, Canberra, ACT 0200 (Australia)

    2015-10-10

    Studies of Lu–Hf isotope systematics in meteorites have produced apparent “ages” that are older than Pb–Pb ages and older than the estimated age of our solar system. One proposed explanation for this discrepancy is that irradiation by cosmic rays caused excitation of {sup 176}Lu to its short-lived isomer that then underwent rapid decay to {sup 176}Hf. This explanation can account for apparent excesses in {sup 176}Hf that correlate with Lu/Hf ratio. Mass balance requires that samples with measurable excess in {sup 176}Hf should also have measurable deficiencies in {sup 176}Lu on the order of 1‰–3‰. To unambiguously test the accelerated decay hypothesis, we have measured the {sup 176}Lu/{sup 175}Lu ratio in terrestrial materials and achondrites to search for evidence of depletion in {sup 176}Lu. To a precision of 0.1‰ terrestrial standards, cumulate and basaltic eucrites and angrites all have the same {sup 176}Lu/{sup 175}Lu ratio. Barring a subsequent mass-dependent fractionation event, these results suggest that the apparent excesses in {sup 176}Hf are not caused by accelerated decay of {sup 176}Lu, and so another hypothesis is required to explain apparently old Lu–Hf ages.

  16. lu sildistamine / Erkki Bahovski

    Index Scriptorium Estoniae

    Bahovski, Erkki, 1970-

    2007-01-01

    President Toomas Hendrik Ilvese üleskutsest moodustada Mälu Instituut Eesti lähimineviku uurimiseks. Autori arvates on Vene propaganda taustal raske uurida ajalugu sine ira et studio ("ilma viha ja eelarvamusteta"), nagu soovitas president

  17. Hybrid synchronization of hyperchaotic Lu system

    Indian Academy of Sciences (India)

    K Sebastian Sudheer; M Sabir

    2009-10-01

    In this paper, we study the hybrid synchronization between two identical hyperchaotic Lu systems. Hybrid synchronization of hyperchaotic Lu system is achieved through synchronization of two pairs of states and anti-synchronization of the other two pairs of states. Active controls are designed to achieve hybrid synchronization between drive and response systems using the sum and difference of relevant variables of the chaotic systems. Numerical simulations are presented to evaluate the analysis and effectiveness of the controllers.

  18. Hydrothermal route to Eu doped LuO(OH) and Lu2O3 nanorods

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    A facile method was developed to synthesize Eu doped LuO(OH) nanorods through hydrothermal processing and Lu2O3 nanorods by subsequent calcining.The microstructural morphologies of the Lu-based nanostructures could be controlled by simply varying the concentration of NaOH in hydrothermal processing as mineralizer.TEM observation revealed that the obtained LuO(OH) nanorods after hydrothermal processing had a uniform diameter of 10-25 nm and a length around 100 nm.After heat treatment at 600-700°C for 2 h,the high length/diameter ratio was sustained in the obtained Lu2O3 nanorods with different sizes depending on the calcining temperatures.

  19. Preparation and Preliminary Evaluation of 177Lu-EDTMP

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    <正>The study on 177Lu labeled radiopharmaceuticals for cancer therapy is fast emerging as an important part of nuclear medicine. 177Lu-EDTMP is possible to be an effective radiopharmaceutical for pain

  20. Plasticity theory

    CERN Document Server

    Lubliner, Jacob

    2008-01-01

    The aim of Plasticity Theory is to provide a comprehensive introduction to the contemporary state of knowledge in basic plasticity theory and to its applications. It treats several areas not commonly found between the covers of a single book: the physics of plasticity, constitutive theory, dynamic plasticity, large-deformation plasticity, and numerical methods, in addition to a representative survey of problems treated by classical methods, such as elastic-plastic problems, plane plastic flow, and limit analysis; the problem discussed come from areas of interest to mechanical, structural, and

  1. Spectral properties of hydrothermally-grown Nd:LuAG, Yb:LuAG, and Yb:Lu{sub 2}O{sub 3} laser materials

    Energy Technology Data Exchange (ETDEWEB)

    Brown, David C., E-mail: DBrown@snakecreeklasers.com [Snake Creek Lasers LLC, Friendsville, PA 18818 (United States); McMillen, Colin D.; Moore, Cheryl; Kolis, Joseph W. [Department of Chemistry and Center for Optical Materials Science and Engineering Technologies, Clemson University, Clemson, SC 29634-0973 (United States); Envid, Victoria [Snake Creek Lasers LLC, Friendsville, PA 18818 (United States)

    2014-04-15

    We have investigated the hydrothermal growth of, and spectrally characterized, the lutetium based laser materials Nd:LuAG, Yb:LuAG, and Yb:Lu{sub 2}O{sub 3}. Absorption cross-section data are presented for Nd:LuAG at 83, 175, and 295 K. Absorption cross-section data was also obtained for Yb:LuAG at 83, 175, and 295 K; the 295 K data was used to generate emission cross-sections using the method of reciprocity. For Yb:Lu{sub 2}O{sub 3}, we present absorption cross-sections at 295 K as well as emission cross-sections derived using reciprocity. -- Highlights: • We present spectral properties for hydrothermally-grown laser crystals. • Absorption cross-section data are presented for Nd:LuAG and Yb:LuAG at 83, 175, and 295 K. • Emission cross-sections are presented for Yb:LuAG at 295 K derived by reciprocity. • We present absorption cross-sections at 295 K as well as emission cross-sections derived using reciprocity for the laser material Yb:Lu{sub 2}O{sub 3}.

  2. lu, kallis vara / Peeter Maimik

    Index Scriptorium Estoniae

    Maimik, Peeter, 1944-2010

    2009-01-01

    Poola ohvitseride mõrvamisest NKVD poolt 1940. aastal Katõnis, Andrzej Wajda selleteemalisest filmist "Katõn" ja ajaloolise mälu säilitamise olulisusest. Inimsusevastaste kuritegude uurimise rahvusvahelise komisjoni uurimistööst, mis käsitleb Saksa ja Nõukogude okupatsioone Eestis

  3. LU's Combined Acupuncture Techniques for Diarrhea

    Institute of Scientific and Technical Information of China (English)

    LI Yan-fang; CHEN Chen; NI Zhi-zhen; ZHONG Chen; XIAO Yuan-chun

    2003-01-01

    @@ Diarrhea refers to frequent discharge of loose, even watery stool. In clinic, we used the famous acupuncturist LU Shou-yan's combined acupuncture techniques of along-against, lifting-thrusting and quickslow reinforcing and reducing to treat diarrhea. Now it is reported as follows.

  4. LU factorization for accelerator-based systems

    KAUST Repository

    Agullo, Emmanuel

    2011-12-01

    Multicore architectures enhanced with multiple GPUs are likely to become mainstream High Performance Computing (HPC) platforms in a near future. In this paper, we present the design and implementation of an LU factorization using tile algorithm that can fully exploit the potential of such platforms in spite of their complexity. We use a methodology derived from previous work on Cholesky and QR factorizations. Our contributions essentially consist of providing new CPU/GPU hybrid LU kernels, studying the impact on performance of the looking variants as well as the storage layout in presence of pivoting, tuning the kernels for two different machines composed of multiple recent NVIDIA Tesla S1070 (four GPUs total) and Fermi-based S2050 GPUs (three GPUs total), respectively. The hybrid tile LU asymptotically achieves 1 Tflop/s in single precision on both hardwares. The performance in double precision arithmetic reaches 500 Gflop/s on the Fermi-based system, twice faster than the old GPU generation of Tesla S1070. We also discuss the impact of the number of tiles on the numerical stability. We show that the numerical results of the tile LU factorization will be accurate enough for most applications as long as the computations are performed in double precision arithmetic. © 2011 IEEE.

  5. Properties of LuAP: CE scintillator containing intentional impurities

    CERN Document Server

    Petrosyan, A G; Ovanesyan, K; Lecoq, Paul; Auffray, Etiennette; Trummer, Julia; Kronberger, Matthias; Pédrini, C; Dujardin, C; Anfre, P

    2007-01-01

    Single crystals of LuAP:Ce and LuYAP(Lu*70%):Ce co-doped with tetravalent (Hf and Zr) and pentavalent (Ta) ions were grown from melts by the Bridgman process. Underlying absorption, slope of the optical edge and transmission in the range of emission were compared to those of LuAP:Ce crystals. Absorption coefficients at 260 nm less than 2 cm−1 have been recorded in LuAP:Ce crystals containing tetravalent ions that are lower than the corresponding figures (5–6 cm−1) measured in undoped LuAP. At high concentrations of added impurities, despite of suppression of the parasitic underlying absorption below 300 nm, the slope of the optical edge and transmission in the range of emission are seriously damaged. Scintillation parameters of crystals with added impurities are compared to those of LuAP:Ce.

  6. Plastic Jellyfish.

    Science.gov (United States)

    Moseley, Christine

    2000-01-01

    Presents an environmental science activity designed to enhance students' awareness of the hazards of plastic waste for wildlife in aquatic environments. Discusses how students can take steps to reduce the effects of plastic waste. (WRM)

  7. Production of {sup 177}Lu at the new research reactor FRM-II: Irradiation yield of {sup 176}Lu(n,{gamma}){sup 177}Lu

    Energy Technology Data Exchange (ETDEWEB)

    Dvorakova, Z. [Institut fuer Radiochemie der Technischen Universitaet Muenchen, D-85748 Garching (Germany)], E-mail: nov@rad.chemie.tu-muenchen.de; Henkelmann, R.; Lin, X.; Tuerler, A. [Institut fuer Radiochemie der Technischen Universitaet Muenchen, D-85748 Garching (Germany); Gerstenberg, H. [ZWE FRM-II der Technischen, Universitaet Muenchen, D-85748 Garching (Germany)

    2008-02-15

    Due to its physical and chemical characteristics, {sup 177}Lu is a very attractive radionuclide for use in nuclear medicine. This paper introduces a method for a precise calculation of the irradiation yield of {sup 177}Lu produced by neutron activation of {sup 176}Lu in a nuclear reactor. The calculation is based on the Westcott convention which requires the knowledge of the neutron flux parameters. In this work, the neutron flux parameters of the new research reactor FRM-II (Garching, Germany) were determined and the stability of thermal neutron flux and thermal neutron flux temperature was monitored. The comparison of theoretically calculated and experimentally determined yield for {sup 176}Lu(n,{gamma}){sup 177}Lu reaction is presented.

  8. A new polymorph of Lu(PO33

    Directory of Open Access Journals (Sweden)

    Anis Bejaoui

    2008-08-01

    Full Text Available A new polymorph of lutetium polyphosphate, Lu(PO33, was found to be isotypic with the trigonal form of Yb(PO33. Two of the three Lu atoms occupy special positions (Wyckoff positions 3a and 3b, site symmetry overline{3}. The atomic arrangement consists of infinite helical polyphosphate chains running along the c axis, with a repeat period of 12 PO4 tetrahedra, joined with LuO6 octahedra.

  9. Ionic liquid-based hydrothermal synthesis of Lu2O3 and Lu2O3:Eu3+ microcrysals

    Science.gov (United States)

    Li, Yinyan; Xu, Shiqing

    2016-09-01

    Uniform and well-defined Lu2O3 and Lu2O3:Eu3+ microarchitectures have been successfully synthesized via a green and facile ionic liquid-based hydrothermal method followed by a subsequent calcination process. Novel 3D micro-rodbundles and 1D microrods of Lu2O3 and Lu2O3:Eu3+ were controllably obtained through this method. X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy and photoluminescence spectra were used to characterize the micromaterials. The proposed formation mechanisms have been investigated on the basis of a series of SEM studies of the products obtained at different hydrothermal durations. The results indicated that hydrothermal temperature and the ionic liquid-tetrabutylammonium hydroxide were two key factors for the formation as well as the morphology control of the Lu2O3 and Lu2O3:Eu3+ microarchitectures.

  10. The responses of surface albedo to climatic changes in Xilin Gol grassland%锡林郭勒草原地表反照率对气候变化的响应

    Institute of Scientific and Technical Information of China (English)

    张学珍

    2012-01-01

    This study assessed the reliability of Moderate Resolution Imaging Spectroradiometer(MODIS)-derived land surface albedo products for Xilin Gol grassland,illustrated the seasonal cycles and inter-annual variations of land surface albedo in Xilin Gol grassland,and analyzed correlations between surface albedo variations and climatic changes.The results show MODIS-derived dataset is able to capture seasonal cycle and inter-annual variations of surface albedo,though there is a difference between the MODIS-derived albedo and ground instrumental measurements.The MODIS-derived dataset illustrates that the seasonal cycle patterns of surface albedo vary with spectrum.For the visible band surface albedo,the seasonal cycle presents a "V"-shaped variation with the bottom in the first ten days of August.For the near-infrared band surface albedo,the seasonal cycle is "U"-shaped with the bottom in the period from June to September.However,both visible band surface albedo and near-infrared band surface albedo had consistent inter-annual variations.Moreover,the inter-annual variations of surface albedo were partly attributed to climatic variations.The effects of temperature were significant in the early(April to May) and late(September to November) growth season.The correlation coefficients between temperature and surface albedo were-0.67 and 0.63 in the early and late growth season,respectively.The effects of precipitation were significant through out the growth season.The correlation coefficients between precipitation and surface albedo ranged from-0.54 to-0.76.It is worthy noting that the effects of precipitation were usually lagged by 2-3 months.%在对锡林郭勒草原地区MODIS的地表反照率产品(MCD43C3)的可靠性进行评估的基础上,利用该产品分析了2002~2009年锡林郭勒草原地表反照率的变化及其与温度和降水的关系。结果表明:(1)MODIS的反演结果能够很好地反映地表反照率的季节

  11. Plastics Technology.

    Science.gov (United States)

    Barker, Tommy G.

    This curriculum guide is designed to assist junior high schools industrial arts teachers in planning new courses and revising existing courses in plastics technology. Addressed in the individual units of the guide are the following topics: introduction to production technology; history and development of plastics; safety; youth leadership,…

  12. SuperLU users' guide

    Energy Technology Data Exchange (ETDEWEB)

    Demmel, James W.; Gilbert, John R.; Li, Xiaoye S.

    1999-11-01

    This document describes a collection of three related ANSI C subroutine libraries for solving sparse linear systems of equations AX = B: Here A is a square, nonsingular, n x n sparse matrix, and X and B are dense n x nrhs matrices, where nrhs is the number of right-hand sides and solution vectors. Matrix A need not be symmetric or definite; indeed, SuperLU is particularly appropriate for matrices with very unsymmetric structure. All three libraries use variations of Gaussian elimination optimized to take advantage both of sparsity and the computer architecture, in particular memory hierarchies (caches) and parallelism.

  13. Prof. Lu Yongxiang Elected IAC Co-Chair

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    @@ CAS President Lu Yongxiang was elected co-chair of the InterAcademy Council (IAC) at the Fifth Annual Meeting of the IAC Board held from January 31 to February 2 in Amsterdam, the Netherlands. President Lu is to succeed Prof. Goverdhan Mehta,former President of the Indian National Science Academy, to represent those from the developing world in the organization.

  14. Neutron capture reactions on Lu isotopes at DANCE

    Directory of Open Access Journals (Sweden)

    Wouters J.M.

    2010-03-01

    Full Text Available The DANCE (Detector for Advanced Neutron Capture Experiments array located at the Los Alamos national laboratory has been used to obtain the neutron capture cross sections for the 175Lu and 176Lu isotopes with neutron energies from thermal up to 100 keV. Both isotopes are of current interest for the nucleosynthesis s-process in astrophysics and for applications as in reactor physics or in nuclear medicine. Three targets were used to perform these measurements. One was natLu foil and the other two were isotope-enriched targets of 175Lu and 176Lu. The cross sections are obtained for now through a precise neutron flux determination and a normalization at the thermal neutron cross section value. A comparison with the recent experimental data and the evaluated data of ENDF/B-VII.0 will be presented. In addition, resonances parameters and spin assignments for some resonances will be featured.

  15. Neutron Capture Reactions on lu Isotopes at Dance

    Science.gov (United States)

    Roig, O.; Meot, V.; Daugas, J.-M.; Morel, P.; Jandel, M.; Vieira, D. J.; Bond, E. M.; Bredeweg, T. A.; Couture, A. J.; Haight, R. C.; Keksis, A. L.; Rundberg, R. S.; Ullmann, J. L.; Wouters, J. M.

    2013-03-01

    The DANCE1 (Detector for Advanced Neutron Capture Experiments) array at LANSCE spallation neutron source in Los Alamos has been used to obtain the neutron radiative capture cross sections for 175Lu and 176Lu with neutron energies from thermal up to 100 keV. Both isotopes are of current interest for the nucleosynthesis s-process.2,3 Three targets were used to perform these measurements. One was natural Lu foil of 31 mg/cm2 and the other two were isotope-enriched targets of 175Lu and 176Lu. Firstly, the cross sections were obtained by normalizing yield to a well-known cross section at the thermal neutron energy. Now, we want to obtain absolute cross sections of radiative capture through a precise neutron flux determination, an accurate target mass measurement and an efficiency determination of the DANCE array.

  16. LuAG:Pr, LuAG:La, and LuAP:Ce thin film scintillators for visualisation of x-ray images

    Science.gov (United States)

    Zorenko, Yuriy; Gorbenko, Vitaliy; Voznyak, Taras; Martin, Thierry; Douissard, Paul-Antoine; Mares, Jiri A.; Nikl, Martin

    2009-05-01

    The work is dedicated to investigation of the luminescent properties of UV-emitting single crystalline films (SCF) based on the Lu3Al5O12:La and Lu3Al5O12:Pr garnet and LuAlO3:Ce perovskite compounds grown by liquid phase epitaxy method from the PbO-B2O3 flux onto Y3Al5O12 and YAlO3 substrates, respectively, for testing as scintillation screens in high-resolution microimaging detectors used in applications with synchrotrons radiation. The first image with a spatial resolution of about 1.5 μm of X-ray excited resolution target was obtained using only the UV part of the light of the LuAG:La SCF scintillators. The possible ways for improvement of figure-of-merit of UV emitting SCF scintillators and increase of spatial resolution of the detector are discussed.

  17. Plastic bronchitis

    National Research Council Canada - National Science Library

    Singhi, Anil Kumar; Vinoth, Bharathi; Kuruvilla, Sarah; Sivakumar, Kothandam

    2015-01-01

    Plastic bronchitis, a rare but serious clinical condition, commonly seen after Fontan surgeries in children, may be a manifestation of suboptimal adaptation to the cavopulmonary circulation with unfavorable hemodynamics...

  18. Plastic Fishes

    CERN Multimedia

    Trettnak, Wolfgang

    2015-01-01

    In terms of weight, the plastic pollution in the world’s oceans is estimated to be around 300,000 tonnes. This plastic comes from both land-based and ocean-based sources. A lecture at CERN by chemist Wolfgang Trettnak addressed this issue and highlighted the role of art in raising people’s awareness. The slideshow below gives you a taste of the artworks by Wolfgang Trettnak and Margarita Cimadevila.

  19. Plastic Bridge

    Institute of Scientific and Technical Information of China (English)

    履之

    1994-01-01

    Already ubiquitous in homes and cars, plastic is now appearing inbridges. An academic-industrial consortium based at the University ofCalifornia in San Diego is launching a three-year research program aimed atdeveloping the world’s first plastic highway bridge, a 450-foot span madeentirely from glass-,carbon,and polymer-fiber-reinforced composite mate-rials, the stuff of military aircraft. It will cross Interstate 5 to connect thetwo sides of the school’s campus.

  20. GREEN PLASTIC: A NEW PLASTIC FOR PACKAGING

    OpenAIRE

    Mr. Pankaj Kumar*, Sonia

    2016-01-01

    This paper gives a brief idea about a new type of plastic called as bio-plastic or green plastic. Plastic is used as a packaging material for various products, but this plastic is made up of non renewable raw materials. There are various disadvantages of using conventional plastic like littering, CO2 production, non-degradable in nature etc. To overcome these problems a new type of plastic is discovered called bio-plastic or green plastic. Bio-plastic is made from renewable resources and also...

  1. LUPOD: Collocation in POD via LU decomposition

    Science.gov (United States)

    Rapún, M.-L.; Terragni, F.; Vega, J. M.

    2017-04-01

    A collocation method is developed for the (truncated) POD of a set of snapshots. In other words, POD computations are performed using only a set of collocation points, whose number is comparable to the number of retained modes, in a similar fashion as in collocation spectral methods. Intending to rely on simple ideas which, moreover, are consistent with the essence of POD, collocation points are computed via the LU decomposition with pivoting of the snapshot matrix. The new method is illustrated in simple applications in which POD is used as a data-processing method. The performance of the method is tested in the computationally efficient construction of reduced order models based on POD plus Galerkin projection for the complex Ginzburg-Landau equation in one and two space dimensions.

  2. Ternary compounds and isothermal section in Lu-Fe-Ga ternary system at 773 K

    Science.gov (United States)

    Liu, Fusheng; Ao, Weiqin; Pan, Laicai; Wang, Qibao; Yan, Jialing; Li, Junqin

    2013-06-01

    The isothermal section of the Lu-Fe-Ga ternary system at 773 K was investigated and constructed based on X-ray powder diffraction analysis. Thirteen binary compounds, Lu2Fe17, Lu6Fe23, LuFe2, LuGa3, LuGa2, Lu3Ga5, LuGa, Lu3Ga2, Lu5Ga3, Fe3Ga, Fe6Ga5, Fe3Ga4, FeGa3, nine ternary solid solutions, T1-LuFe2-1.43Ga0-0.57, T2-LuFe1.34-0.92Ga0.68-1.08, T3-LuFe0.52-0.26Ga1.48-1.74, T5-LuFe2.04-1.72Ga0.96-1.28, T6-Lu6Fe23-21.4Ga0-1.6, T7-Lu2Fe17-14.5Ga0-3.5, T8-Lu2Fe12.9-8.1Ga4.1-8.9, T9-LuFe6.8-5.5Ga5.2-6.5, T10-LuFe5.2-4.5Ga6.8-7.5, and two ternary compounds, T4-LuFe2.35Ga0.65 and T11-Lu2FeGa8 have been confirmed. The structures of the five new ternary compounds or solid solution T2, T3, T4, T5 and T8 are determined by Rietveld refinement method.

  3. Plastic condoms.

    Science.gov (United States)

    1968-01-01

    Only simple equipment, simple technology and low initial capital investment are needed in their manufacture. The condoms can be made by people who were previously unskilled or only semi-skilled workers. Plastic condoms differ from those made of latex rubber in that the nature of the plastic film allows unlimited shelf-life. Also, the plastic has a higher degree of lubricity than latex rubber; if there is a demand for extra lubrication in a particular market, this can be provided. Because the plastic is inert, these condoms need not be packaged in hermetically sealed containers. All these attributes make it possible to put these condoms on the distributors' shelves in developing countries competitively with rubber condoms. The shape of the plastic condom is based on that of the lamb caecum, which has long been used as luxury-type condom. The plastic condom is made from plastic film (ethylene ethyl acrilate) of 0.001 inch (0.0254 mm.) thickness. In addition, a rubber ring is provided and sealed into the base of the condom for retention during coitus. The advantage of the plastic condom design and the equipment on which it is made is that production can be carried out either in labour-intensive economy or with varying degrees of mechanization and automation. The uniform, finished condom if made using previously untrained workers. Training of workers can be done in a matter of hours on the two machines which are needed to produce and test the condoms. The plastic film is provided on a double wound roll, and condom blanks are prepared by means of a heat-sealing die on the stamping machine. The rubber rings are united to the condom blanks on an assembly machine, which consists of a mandrel and heat-sealing equipment to seal the rubber ring to the base of the condom. Built into the assembly machine is a simple air-testing apparatus that can detect the smallest pinhole flaw in a condom. The manufacturing process is completed by unravelling the condom from the assembly

  4. Plastic Bronchitis.

    Science.gov (United States)

    Rubin, Bruce K

    2016-09-01

    Plastic bronchitis is an uncommon and probably underrecognized disorder, diagnosed by the expectoration or bronchoscopic removal of firm, cohesive, branching casts. It should not be confused with purulent mucous plugging of the airway as seen in patients with cystic fibrosis or bronchiectasis. Few medications have been shown to be effective and some are now recognized as potentially harmful. Current research directions in plastic bronchitis research include understanding the genetics of lymphatic development and maldevelopment, determining how abnormal lymphatic malformations contribute to cast formation, and developing new treatments. Copyright © 2016 Elsevier Inc. All rights reserved.

  5. Atomic-layer deposition of Lu2O3

    Science.gov (United States)

    Scarel, G.; Bonera, E.; Wiemer, C.; Tallarida, G.; Spiga, S.; Fanciulli, M.; Fedushkin, I. L.; Schumann, H.; Lebedinskii, Yu.; Zenkevich, A.

    2004-07-01

    Rare earth oxides could represent a valuable alternative to SiO2 in complementary metal-oxide-semiconductor devices. Lu2O3 is proposed because of its predicted thermodynamical stability on silicon and large conduction band offset. We report on the growth by atomic-layer deposition of lutetium oxide films using the dimeric {[C5H4(SiMe3)]2LuCl}2 complex, which has been synthesized for this purpose, and H2O. The films were found to be stoichiometric, with Lu2O3 composition, and amorphous. Annealing in nitrogen at 950°C leads to crystallization in the cubic bixbyite structure. The dielectric constant of the as-grown Lu2O3 layers is 12±1.

  6. Geometric Structures and Field Equations of Dirac-Lu Space

    Institute of Scientific and Technical Information of China (English)

    REN Xin-An; ZHANG Li-You

    2008-01-01

    In this paper, a -invariant Lorentz metric on the Dirac-Lu space is given, and then the geodesic equation is investigated. Finally, we discuss the field equations and find their solutions by the method of separating variables.

  7. LU Yongxiang receives honorary doctoral degree from HKU

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    @@ Together with 1998 Nobel Prize winner in physics Daniel Chee Tsui from Princeton University, CAS President LU Yongxiang was conferred Doctor of Science honoris causa by the University of Hong Kong (HKU) at the congregation held on 24 April.

  8. Mixed plastics recycling technology

    CERN Document Server

    Hegberg, Bruce

    1995-01-01

    Presents an overview of mixed plastics recycling technology. In addition, it characterizes mixed plastics wastes and describes collection methods, costs, and markets for reprocessed plastics products.

  9. Plastic fish

    CERN Multimedia

    Antonella Del Rosso

    2015-01-01

    In terms of weight, the plastic pollution in the world’s oceans is estimated to be around 300,000 tonnes. This plastic comes from both land-based and ocean-based sources. A lecture at CERN by chemist Wolfgang Trettnak addressed this issue and highlighted the role of art in raising people’s awareness.   Artwork by Wolfgang Trettnak. Packaging materials, consumer goods (shoes, kids’ toys, etc.), leftovers from fishing and aquaculture activities… our oceans and beaches are full of plastic litter. Most of the debris from beaches is plastic bottles. “PET bottles have high durability and stability,” explains Wolfgang Trettnak, a chemist by education and artist from Austria, who gave a lecture on this topic organised by the Staff Association at CERN on 26 May. “PET degrades very slowly and the estimated lifetime of a bottle is 450 years.” In addition to the beach litter accumulated from human use, rivers bring several ki...

  10. Plastic zonnecellen

    NARCIS (Netherlands)

    Roggen, Marjolein

    1998-01-01

    De zonnecel van de toekomst is in de maak. Onderzoekers van uiteenlopend pluimage werken eendrachtig aan een plastic zonnecel. De basis is technisch gelegd met een optimale, door invallend licht veroorzaakte, vorming van ladingdragers binnen een composiet van polymeren en buckyballs. Nu is het zaak

  11. Luminescence and scintillation properties of BaY2F8 : Ce3+, BaLu2F8 and BaLu2F8 : Ce3+

    NARCIS (Netherlands)

    van't Spijker, JC; Dorenbos, P; van Eijk, CWE; Jacobs, JEM; den Hartog, HW; Korolev, N

    1999-01-01

    Spectroscopic and scintillation properties of BaY2F8 :Ce3+, BaLu2F8 and BaLu2F8 :Ce3+ are presented. For pure BaLu2F8, a luminescence with a decay time of similar to 1 ns is observed under gamma-ray excitation. This luminescence with a light yield of about 200 ph/MeV is attributed to core-valence lu

  12. Exploiting fine-grain parallelism in recursive LU factorization

    KAUST Repository

    Dongarra, Jack

    2012-01-01

    The LU factorization is an important numerical algorithm for solving system of linear equations. This paper proposes a novel approach for computing the LU factorization in parallel on multicore architectures. It improves the overall performance and also achieves the numerical quality of the standard LU factorization with partial pivoting. While the update of the trailing submatrix is computationally intensive and highly parallel, the inherently problematic portion of the LU factorization is the panel factorization due to its memory-bound characteristic and the atomicity of selecting the appropriate pivots. We remedy this in our new approach to LU factorization of (narrow and tall) panel submatrices. We use a parallel fine-grained recursive formulation of the factorization. It is based on conflict-free partitioning of the data and lock-less synchronization mechanisms. Our implementation lets the overall computation naturally flow with limited contention. Our recursive panel factorization provides the necessary performance increase for the inherently problematic portion of the LU factorization of square matrices. A large panel width results in larger Amdahl\\'s fraction as our experiments have revealed which is consistent with related efforts. The performance results of our implementation reveal superlinear speedup and far exceed what can be achieved with equivalent MKL and/or LAPACK routines. © 2012 The authors and IOS Press. All rights reserved.

  13. Variation Tendency Analysis of Prevalence of Incidence Rate of Human Brucellosis for Key Populations in Xilin Gol League During 2010-2014%2010-2014年锡林郭勒盟重点人群布病发病率趋势分析

    Institute of Scientific and Technical Information of China (English)

    曹宁; 闫涛; 朱浩; 张星光

    2016-01-01

    目的:通过报道2010-2014年锡林郭勒盟人间布病的发病率及其变化趋势,评价该地区2010-2014年的布病整体流行情况,为进一步防治策略的制定提供科学依据。方法本研究在2010-2014年间采用随机整群抽样的方法共抽取了96090名调查对象,同时对其进行血清学检测,根据布病诊断标准对调查对象进行诊断,以此描述锡林郭勒盟地区人间布病的发病率。结果2010-2014年锡林郭勒盟重点人群布病发病率为17.87‰。2010-2014年锡林郭勒盟人间布病发病率呈下降趋势,在2014年达到最低。绝大多数旗县(市区)5年间布病疫情变化有统计学意义(P<0.05)。结论2010-2014年锡林郭勒盟重点人群的布病疫情呈下降趋势,但仍处于较高水平,锡林郭勒盟的布病防治工作仍然需要进一步开展。%Objectives To show incidence rate of human brucellosis for key populations and describe its distribution and varition in Xilin Gol League during 2010-2014; to provide reference for brucellosis intervention. Methods We included 96091 participants in this study by random cluster sampling during the period 2010-2014. In addition, we conducted serological testing for participants to describe the incidence of human brucellosis. Results The average incidence rate of human brucellosis for key populations in Xilin Gol League during 2010-2014 was 17.87‰. Incidence rate of brucellosis among key populations of Xilin Gol League clearly decreased during 2010-2014, and it was lowest in 2014. The epidemic changes of brucellosis in most districts have statistical significance (P<0.05). Conclusions The incidence of human brucellosis for key populations of Xilin Gol League clearly decreased during 2010-2014, but also stayed in a high level, it remind us that prevention efforts should be strengthened in the study region.

  14. Plastic Surgery Statistics

    Science.gov (United States)

    ... PSN PSEN GRAFT Contact Us News Plastic Surgery Statistics Plastic surgery procedural statistics from the American Society of Plastic Surgeons. Statistics by Year Print 2016 Plastic Surgery Statistics 2015 ...

  15. High frequency band crossings in ^168Lu.

    Science.gov (United States)

    Roux, D. G.; Li, Y.; Ma, W. C.; Amro, H.; Thompson, J.; Winger, J.; Hagemann, G.; Herskind, B.; Jensen, D.; Sletten, G.; Wilson, J.; Fallon, P.; Diamond, R.; Goergen, A.; Machiavelli, A.; Ward, D.; Hübel, H.; Domscheit, J.

    2003-10-01

    High spin states in ^168Lu were populated using the ^123Sb(^48Ca,3n) reaction at 203 MeV. The beam was provided by the 88" cyclotron at LBNL, and coincident gamma rays were detected with the Gammasphere spectrometer array. An analysis of the data which had been sorted into three- and four- dimensional histograms confirmed the four previously known (J.H.Ha et al. J. Phys. Soc. Japan 71 (2002) 1663-1671) pairs of signature partner bands and extended them to considerably higher spins (in one case up to a tentative 50 hbar). In addition, a new pair of signature partners, as well as a new doubly decoupled band were found. On the basis of the present data, the configuration of one of the known bands, previously assigned π d_3/2 øtimes ν i_13/2 was reassigned as π d_5/2 øtimes ν i_13/2. High frequency band crossings, beyond the first ν i_13/2 alignment, were observed for the first time. These results will be discussed with reference to Cranking Shell Model calculations.

  16. The covalent bonding interaction in the ferroelectric LuMnO3

    Science.gov (United States)

    Ahn, Suk-Jin; Kim, Jinyoung; Shin, Namsoo; Koo, Yang-Mo

    2011-10-01

    The electron density distributions of paraelectric and ferroelectric LuMnO3 are analyzed using high temperature synchrotron x-ray powder diffraction data with the Rietveld method, the maximum entropy method (MEM), and MEM-based pattern fitting. Bonding electrons due to orbital hybridization are clearly seen in the Lu1-O3 and Lu2-O4 bonds along the c-axis polarization direction. The Lu1-O3 bond was determined to be covalent due to hybridization below the ferroelectric transition temperature, and was identified as the driving force for ferroelectricity in LuMnO3. However, the Lu2-O4 bond shows covalent character in both paraelectric and ferroelectric states. Also, we suggest that the Lu2-O4 covalent bonding is responsible for large spontaneous polarization in LuMnO3, associated with the small radius of the Lu3+ ion.

  17. Adhesive activity of Lu glycoproteins is regulated by interaction with spectrin

    Energy Technology Data Exchange (ETDEWEB)

    An, Xiuli; Gauthier, Emilie; Zhang, Xihui; Guo, Xinhua; Anstee, David; Mohandas, Narla; Anne Chasis, Joel

    2008-03-18

    The Lutheran (Lu) and Lu(v13) blood group glycoproteins function as receptors for extracellular matrix laminins. Lu and Lu(v13) are linked to the erythrocyte cytoskeleton through a direct interaction with spectrin. However, neither the molecular basis of the interaction nor its functional consequences have previously been delineated. In the present study, we defined the binding motifs of Lu and Lu(v13) on spectrin and identified a functional role for this interaction. We found that the cytoplasmic domains of both Lu and Lu(v13) bound to repeat 4 of the spectrin chain. The interaction of full-length spectrin dimer to Lu and Lu(v13) was inhibited by repeat 4 of {alpha}-spectrin. Further, resealing of this repeat peptide into erythrocytes led to weakened Lu-cytoskeleton interaction as demonstrated by increased detergent extractability of Lu. Importantly, disruption of the Lu-spectrin linkage was accompanied by enhanced cell adhesion to laminin. We conclude that the interaction of the Lu cytoplasmic tail with the cytoskeleton regulates its adhesive receptor function.

  18. Plastic bronchitis

    Directory of Open Access Journals (Sweden)

    Anil Kumar Singhi

    2015-01-01

    Full Text Available Plastic bronchitis, a rare but serious clinical condition, commonly seen after Fontan surgeries in children, may be a manifestation of suboptimal adaptation to the cavopulmonary circulation with unfavorable hemodynamics. They are ominous with poor prognosis. Sometimes, infection or airway reactivity may provoke cast bronchitis as a two-step insult on a vulnerable vascular bed. In such instances, aggressive management leads to longer survival. This report of cast bronchitis discusses its current understanding.

  19. Reflections on the Biogas Construction of XilinGol Leaguein Rural and Pastoral Areas%对锡林郭勒盟农村牧区沼气建设的思考

    Institute of Scientific and Technical Information of China (English)

    李万春; 王健; 袁守礼; 雒树青; 任树森; 李玉梁; 籍长岭; 苗馨; 蔡茂林; 李春根

    2014-01-01

    There existing household biogas, small farming community and joint household biogas project and Large biogas in XilinGol League rural and pastoral, village and county biogas service system framework has been erected,the project has achieved remarkable economic,social and ecological benefits.But there are some problems, for example, digesters utilization was not high (10%~20%in the coldest season),property service outlets were not fully appropriate effect (sample survey only 44.4%), biogas utilization level was low,the construction of large biogas was slowly.Analysising the reasons and proposing the next priority:Active in biogas utilization tests and demonstrations,Efforts to explore innovative biogas construction management and post -the service mechanism,Increased guidance and inspection efforts to strengthen project management,introducing commercialization digesters in actively and steadily.Suggestions:Increasing investment in central special funds,giving appropriate wage subsidies to biogas service outlets managers,introducing large biogas project supervisions and management measures and multi-energy complements as soon. Intended to summarize the experience and lessons, and effectively improved the work of rural biogas,take effective measures to implement the plans, through technology, innovation and organizational management measures on a really good job of biogas construction and management work to consolidate the cause of biogas career achievements.%锡林郭勒盟农村牧区沼气建设既有户用沼气、养殖小区和联户小型沼气工程,又有大中型沼气工程,从嘎查(村)级到旗县级服务站的沼气服务体系框架已搭起,项目建设取得了明显的经济、社会和生态效益。但同时也存在着沼气池使用率不高(最寒冷季节仅10%~20%)、物业服务网点未充分发挥相应的作用(抽样调查正常运行仅占44.4%)、三沼综合利用水平低、大中型沼气工程建设进度缓慢

  20. The foundation of a grassland 3D-digital model for Xilin Gol%锡林郭勒盟草原三维数字模型的建立

    Institute of Scientific and Technical Information of China (English)

    王瑞永; 乔江; 袁清

    2011-01-01

    To promote the further development of information-based management of grasslands, this work established a grassland three-dimensional digital model based on modern information technology, including 3D-GIS technology, remote sensing technology, simulation technology and other related technologies. The foundation of the 3D-digital model is based upon the Xilin Gol grassland as a demonstration area. The establishment of this digital model is based first on screen grassland information data (maps data and attribute data) according to the principles of grassland ecology; second, an overlay of the layer data filtered to establish the association with attribute data. Finally, the grassland information data was embedded in the three-dimensional virtual space model, to realize queries and analysis of grassland information. The research showed that the grassland three-dimensional digital model developed using the C/C+ + language to call OpenGL graphics library works fast and steadily with fast rendering speed, and can provide real-time and dynamic queries of grassland information, and supply technical support for further studies on three-dimensional virtual grassland.%为了推动草原信息化管理的进一步发展,本研究基于现代化信息技术,主要运用3D-GIS技术、遥感技术、仿真技术等相关技术,以具有典型草原代表性的锡林郭勒盟为示范区,建立了虚拟草原三维数字模型.该研究首先依据草地生态学原理,对草原生态系统信息数据(基础图件及属性数据)进行筛选;然后对筛选后的空间数据进行叠加并建立其与属性数据的关联;最后将草原生态信息镶嵌于三维数字模型之中,实现了在草原三维数字模型中进行草原生态信息查询分析功能.结果表明,运用C/C++语言调用OpenGL图形库从底层开发的草原三维数字模型快捷稳定,渲染速度快,可方便地动态查询示范区草原地理信息,为进一步地研究三维虚拟草原提供技术支持.

  1. Soil Carbon Balance in a Native Temperate Grassland in the Xilin RiverBasin of Inner Mongolia%锡林河流域一个原生草原群落的碳素平衡研究

    Institute of Scientific and Technical Information of China (English)

    李凌浩; 李鑫; 宋世环; 韩兴国; 王其兵; 白文明; 白永飞; 闫志丹; 陈全胜; 张焱; 杨晶

    2002-01-01

    野外调查与历史资料相结合,对内蒙古锡林河流域一个永久试验样地内的羊草( Leymus chinensis (Trin.) Tzvel.)草原群落(原生草原群落)的碳素贮量、主要流量和周转速度等进行了估计.结果表明:1)该群落中地上部净初级生产的碳素固定量的多年平均值为79.8 g C*m-2*a-1,根系碳素输入量的多年平均值为311.9 g C*m-2*a-1,碳素输入总量为391.7 g C*m-2*a-1; 2)土壤净呼吸量为346.9 g C*m-2*a-1,动物(昆虫)采食量14.7 g C*m-2*a-1,地上立枯阶段的淋溶与光化学分解损失为3.2 g C*m-2*a-1,碳素输出总量为364.8 g C*m-2*a-1; 3)该群落中碳素输入略大于输出,净积累速率为26.9 g C*m-2*a-1,0-30 cm土壤中的碳素周转速率为6.2%,周转时间为16年.%Based on historical data and field investigation,some major fluxes and reserves of carbon were estimated,and a tentative analysis of the soil carbon balance was made in a native grassland community in the Xilin River basin of Inner Mongolia.Major results were reported as follows:1) Annual average carbon input from above-ground biomass production was 79.8 g C*m-2*a-1,and from root biomass to 30 cm depth averaged 311.9 g C*m-2*a-1.The summed mean annual carbon input of shoot and root materials in the study site was approximately 391.7 g C*m-2*a-1.2) The annual amount of above-ground biomass consumed by insects averaged 14.7 g C*m-2*a-1,and the carbon output by leaching or light-chemical oxidation was 3.2 g C*m-2*a-1.The annual evolution rate of CO2 from net soil respiration averaged 346.9 g C*m-2*a-1,and the summed mean annual output was approximately 364.8 g C*m-2*a-1.3) A mature,steady-state system could be assumed for the community for which growth and decay were approximately in balance,with a net carbon accumulation of about 26.9 g C*m-2*a-1.Based on the soil organic carbon density of the field,the turnover rate of soil carbon in 0-30 cm depth was calculated to be 6.2%,with a turnover time of 16 years.

  2. Superconductivity in Lu{sub 2}SnC

    Energy Technology Data Exchange (ETDEWEB)

    Kuchida, S., E-mail: s-kuchida@phys.aoyama.ac.jp [Department of Physics and Mathematics, Aoyama-Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258 (Japan); Muranaka, T. [Department of Engineering Science, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585 (Japan); Kawashima, K.; Inoue, K. [Department of Physics and Mathematics, Aoyama-Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258 (Japan); Yoshikawa, M. [IMRA Material Co. Ltd., 2-1 Asahicho, Kariya, Aichi 448-0032 (Japan); Akimitsu, J. [Department of Physics and Mathematics, Aoyama-Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258 (Japan)

    2013-11-15

    Highlights: •We discovered the superconductivity in Lu{sub 2}SnC. •The superconducting transition temperature is confirmed at around 5.2 K. •The M–H curve at 1.8 K shows that Lu{sub 2}SnC is categorized to be a conventional type-II superconductor. -- Abstract: We discovered the superconductivity in Lu{sub 2}SnC with the T{sub c} of 5.2 K. Lu{sub 2}SnC crystallizes in a hexagonal structure (Cr{sub 2}AlC-type) with the space group of P6{sub 3}/mmc. We measured the physical properties of Lu{sub 2}SnC in the superconducting state as functions of temperature and magnetic field. The M–H curve shows the typical type-II superconducting behavior. Superconducting parameters H{sub c1}(0), H{sub c2}(0), λ(0), ξ(0) and κ{sub GL} are determined to be about 110 Oe, 4.5 kOe, 250 nm, 27 nm, and 9.2, respectively.

  3. CVD Lu(2)O(3):Eu coatings For Advanced Scintillators.

    Science.gov (United States)

    Topping, Stephen G; Sarin, V K

    2009-03-01

    Currently Lu(2)O(3):Eu(3+) scintillators can only be fabricated via hot-pressing and pixelization, which is commercially not viable, thus restricting their use. Chemical vapor deposition is being developed as an alternative manufacturing process. Columnar coatings of Lu(2)O(3):Eu(3+) have been achieved using the halide-CO(2)-H(2) system, clearly signifying feasibility of the CVD process. Characterization of the coatings using high resolution scanning electron microscopy (SEM) and x-ray diffraction (XRD) analysis have been used as an aid to optimize process parameters and attain highly oriented and engineered coating structures. These results have clearly demonstrated that this process can be successfully used to tailor sub-micron columnar growth of Lu(2)O(3):Eu(3+), with the potential of ultra high resolution x-ray imaging.

  4. An overview of SuperLU: Algorithms, implementation, and userinterface

    Energy Technology Data Exchange (ETDEWEB)

    Li, Xiaoye S.

    2003-09-30

    We give an overview of the algorithms, design philosophy,and implementation techniques in the software SuperLU, for solving sparseunsymmetric linear systems. In particular, we highlight the differencesbetween the sequential SuperLU (including its multithreaded extension)and parallel SuperLU_DIST. These include the numerical pivoting strategy,the ordering strategy for preserving sparsity, the ordering in which theupdating tasks are performed, the numerical kernel, and theparallelization strategy. Because of the scalability concern, theparallel code is drastically different from the sequential one. Wedescribe the user interfaces ofthe libraries, and illustrate how to usethe libraries most efficiently depending on some matrix characteristics.Finally, we give some examples of how the solver has been used inlarge-scale scientific applications, and the performance.

  5. ^176Lu/^175Lu thermometry for Oklo natural reactors: a new look at old data

    Science.gov (United States)

    Gould, Chris; Sharapov, Eduard

    2012-03-01

    Lutetium thermometry has been used to analyze Oklo natural nuclear reactor zones but leads to widely varying and puzzling predictions for the temperatures TO, which in turn impacts Oklo bounds on the time variation of the fine structure constant α. We revisit results for reactor zone RZ10 in light of new astrophysical measurements of the isomer branching ratio B^g in ^175Lu neutron capture at 5 and 25 keV. We recalculate predictions for TO as a function of B^g using realistic models of the Oklo neutron flux. We find TO= 100 ±30 C using a new value of B^g, in contrast to 350 Oklo reactor data, but a better measurement of B^g with thermal neutrons is needed to confirm the reliability of temperature predictions.

  6. 176Lu/175Lu thermometry for the Oklo natural reactors: A new examination of old data

    Science.gov (United States)

    Gould, C. R.; Sharapov, E. I.

    2012-02-01

    Background: Lutetium thermometry has been used to analyze Oklo natural nuclear reactor zones but leads to widely varying and puzzling predictions for the temperatures TO which in turn impacts bounds on time variation of the fine structure constant α.Purpose: We revisit results for reactor zone RZ10 in light of new measurements of the isomer branching ratio Bg in 175Lu neutron capture at 5 and 25 keV.Method: We recalculate predictions for TO as a function of Bg using realistic models of the Oklo neutron flux.Results: We find TO=100±30 ∘C using a new value of Bg, in contrast to 350Oklo reactor data, but a better measurement of Bg with thermal neutrons is needed to confirm the reliability of temperature predictions.

  7. Fabrication and characterization of spark plasma sintered Ce:LuAG ceramic for scintillation application

    Energy Technology Data Exchange (ETDEWEB)

    Kumar, S. Arun; Senthilselvan, J., E-mail: jsselvan@hotmail.com [Department of Nuclear Physics, University of Madras, Guindy Campus, Chennai–600 025, Tamil Nadu (India)

    2016-05-23

    Rare earth Cerium doped Lutetium Aluminum Garnet (Ce:LuAG) ceramics are widely used as phosphor material in medical imaging and high-energy physics. Due to its technological importance, an attempt has been made to fabricate Ce:LuAG ceramics by using spark plasma sintering (SPS) technique. XRD patterns of SPS sintered Ce:LuAG ceramics reveals a mixed LuAG and CeO{sub 2} (antisite defect) phases. The microstructures of SPS sintered Ce:LuAG ceramics shows limited densification, inappropriate compaction of particles and existence of residual pores, voids between the grain boundaries affects the transparency of Ce:LuAG ceramics. Relative density and hardness of post sintered Ce:LuAG ceramic is also determined. The effect of Ce{sup 3+} doping concentration and sintering temperature on optical luminescence behavior of Ce:LuAG ceramic is presented.

  8. Fabrication and characterization of spark plasma sintered Ce:LuAG ceramic for scintillation application

    Science.gov (United States)

    Kumar, S. Arun; Senthilselvan, J.

    2016-05-01

    Rare earth Cerium doped Lutetium Aluminum Garnet (Ce:LuAG) ceramics are widely used as phosphor material in medical imaging and high-energy physics. Due to its technological importance, an attempt has been made to fabricate Ce:LuAG ceramics by using spark plasma sintering (SPS) technique. XRD patterns of SPS sintered Ce:LuAG ceramics reveals a mixed LuAG and CeO2 (antisite defect) phases. The microstructures of SPS sintered Ce:LuAG ceramics shows limited densification, inappropriate compaction of particles and existence of residual pores, voids between the grain boundaries affects the transparency of Ce:LuAG ceramics. Relative density and hardness of post sintered Ce:LuAG ceramic is also determined. The effect of Ce3+ doping concentration and sintering temperature on optical luminescence behavior of Ce:LuAG ceramic is presented.

  9. On the Stark Broadening of Lu III Spectral Lines

    Indian Academy of Sciences (India)

    Zlatko Majlinger; Zoran Simić; Milan S. Dimitrijević

    2015-12-01

    The electron-impact widths for 27 Lu III spectral lines have been calculated by using the modified semiempirical method. Calculations have been also performed with the published relativistic Hartree-Fock oscillator strengths and additionally, with the approximate formula of Cowley.With the obtained results, the influence of Stark broadening on Lu III lines was investigated in the spectra of A-type stars. The obtained data will be included in the STARK-B database, which is part of the Virtual Atomic and Molecular Data Center – VAMDC.

  10. Performance analysis of parallel supernodal sparse LU factorization

    Energy Technology Data Exchange (ETDEWEB)

    Grigori, Laura; Li, Xiaoye S.

    2004-02-05

    We investigate performance characteristics for the LU factorization of large matrices with various sparsity patterns. We consider supernodal right-looking parallel factorization on a bi-dimensional grid of processors, making use of static pivoting. We develop a performance model and we validate it using the implementation in SuperLU-DIST, the real matrices and the IBM Power3 machine at NERSC. We use this model to obtain performance bounds on parallel computers, to perform scalability analysis and to identify performance bottlenecks. We also discuss the role of load balance and data distribution in this approach.

  11. Preparation and Biodistribution Evaluation in Mice of ~(177)Lu-DOTA-TOC

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    The study of 177Lu labeled radiopharmaceuticals for cancer therapy is fast emerging as an important part of nuclear medicine. 177Lu-labelling of DOTA derivatized peptide DOTA-TOC (Tyr3-Octreotide) was carried out and biodistribution of 177Lu-DOTA-TOC in normal

  12. Overcoming maladaptive plasticity through plastic compensation

    Directory of Open Access Journals (Sweden)

    Matthew R.J. MORRIS, Sean M. ROGERS

    2013-08-01

    Full Text Available Most species evolve within fluctuating environments, and have developed adaptations to meet the challenges posed by environmental heterogeneity. One such adaptation is phenotypic plasticity, or the ability of a single genotype to produce multiple environmentally-induced phenotypes. Yet, not all plasticity is adaptive. Despite the renewed interest in adaptive phenotypic plasticity and its consequences for evolution, much less is known about maladaptive plasticity. However, maladaptive plasticity is likely an important driver of phenotypic similarity among populations living in different environments. This paper traces four strategies for overcoming maladaptive plasticity that result in phenotypic similarity, two of which involve genetic changes (standing genetic variation, genetic compensation and two of which do not (standing epigenetic variation, plastic compensation. Plastic compensation is defined as adaptive plasticity overcoming maladaptive plasticity. In particular, plastic compensation may increase the likelihood of genetic compensation by facilitating population persistence. We provide key terms to disentangle these aspects of phenotypic plasticity and introduce examples to reinforce the potential importance of plastic compensation for understanding evolutionary change [Current Zoology 59 (4: 526–536, 2013].

  13. Overcoming maladaptive plasticity through plastic compensation

    Institute of Scientific and Technical Information of China (English)

    Matthew R.J.MORRIS; Sean M.ROGERS

    2013-01-01

    Most species evolve within fluctuating environments,and have developed adaptations to meet the challenges posed by environmental heterogeneity.One such adaptation is phenotypic plasticity,or the ability of a single genotype to produce multiple environmentally-induced phenotypes.Yet,not all plasticity is adaptive.Despite the renewed interest in adaptive phenotypic plasticity and its consequences for evolution,much less is known about maladaptive plasticity.However,maladaptive plasticity is likely an important driver of phenotypic similarity among populations living in different environments.This paper traces four strategies for overcoming maladaptive plasticity that result in phenotypic similarity,two of which involve genetic changes (standing genetic variation,genetic compensation) and two of which do not (standing epigenetic variation,plastic compensation).Plastic compensation is defined as adaptive plasticity overcoming maladaptive plasticity.In particular,plastic compensation may increase the likelihood of genetic compensation by facilitating population persistence.We provide key terms to disentangle these aspects of phenotypic plasticity and introduce examples to reinforce the potential importance of plastic compensation for understanding evolutionary change.

  14. Light yield and light loss coefficient of LuAG:Ce and LuAG:Pr under excitation with α- and γ-rays

    Science.gov (United States)

    Sreebunpeng, Krittiya; Chewpraditkul, Weerapong; Nikl, Martin

    2017-06-01

    Light yield and light loss coefficient of Lu3Al5O12:Ce (LuAG:Ce) and Lu3Al5O12:Pr (LuAG:Pr) single crystals grown by the Czochralski method were investigated under excitation with α- and γ-rays. Photoelectron yield and energy resolution were measured using the XP5200B photomultiplier. The dependence of photoelectron yield on sample height was measured under excitation with α- and γ-rays and the light loss coefficient was evaluated. It was found that the light loss coefficient of LuAG:Ce is smaller than that of LuAG:Pr. The ratio of photoelectron yield under excitation with α- and γ-rays (α/γ ratio) was also determined and discussed.

  15. ASASSN-15lu is a Type Ia Supernova

    OpenAIRE

    2015-01-01

    We report spectroscopic classification of ASASSN-15lu (ATel #7698) in SDSS J132112.88+401556.7 (z=0.035037, via NED) through inspection of an optical spectrum (range 370-680 nm, resolution 0.8 nm), obtained with the 2.3-m Bok telescope (+ Boller & Chivens spectrograph) at Kitt Peak on 2015 June 24.2 UT.

  16. ASASSN-15lu is a Type Ia Supernova

    NARCIS (Netherlands)

    Leonard, D.C.; Sheehan, P.; McCarthy, D.; Follette, K.; Moustakas, J.; Cantillo, D.; Cazares-Kelly, A.; Cazares-Kelly, S.; Cendes, Y.; Damm, N.; Donati, A.; Douglas, E.; Ferrell, L.; Fosbinder-Elkins, H.; Fox, C.; Greenberg, M.; Hart, K.; Hensley, H.; Holt, A.; Hooper, E.; Juran, C.; Keane, J.; Key, K.; Korus, L.; Lee, T.; Leidig, K.; Merchak, E.; Nessmann, K.; Pendyala, S.; Pirkl, S.; Reeder, J.; Roos, A.; Rounseville, S.; Ruddy, E.; Schlingman, A.; Schlingman, W.; Schwartzman, E.; Shanmugam, V.; Silver, E.; Stein, A.; Stock, N.; Svoboda, B.; Thomas, B.; Thomas, N.; Thompson-Taylor, K.; Walton, H.

    2015-01-01

    We report spectroscopic classification of ASASSN-15lu (ATel #7698) in SDSS J132112.88+401556.7 (z=0.035037, via NED) through inspection of an optical spectrum (range 370-680 nm, resolution 0.8 nm), obtained with the 2.3-m Bok telescope (+ Boller & Chivens spectrograph) at Kitt Peak on 2015 June 24.2

  17. Resonantly pumped room temperature Ho:LuVO₄ laser.

    Science.gov (United States)

    Yao, B Q; Cui, Z; Duan, X M; Du, Y Q; Han, L; Shen, Y J

    2014-11-01

    Spectroscopic characterization of a Ho:LuVO4 crystal grown by the Czochralski method has been performed, including the absorption and emission spectra. We demonstrate a 2 μm room temperature Ho:LuVO4 laser, resonantly pumped by a 1.94 μm Tm:YAP laser. By use of an output coupler with T=10% transmission, the Ho:LuVO4 laser generated continuous-wave output power of 2.5 W at 2074.18 nm, with a beam quality factor of Mx2=My2=1.3, for a total incident pump power of 19.4 W. The slope efficiency with respect to the pump power was 17.6%, and the optical-to-optical efficiency was 12.9%. Moreover, we obtained a Ho:LuVO4 laser that operated at 2073.77 and 2055.27 nm, by using different output couplers with transmissions of T=15 and 30%.

  18. ASASSN-15lu is a Type Ia Supernova

    NARCIS (Netherlands)

    Leonard, D.C.; Sheehan, P.; McCarthy, D.; Follette, K.; Moustakas, J.; Cantillo, D.; Cazares-Kelly, A.; Cazares-Kelly, S.; Cendes, Y.; Damm, N.; Donati, A.; Douglas, E.; Ferrell, L.; Fosbinder-Elkins, H.; Fox, C.; Greenberg, M.; Hart, K.; Hensley, H.; Holt, A.; Hooper, E.; Juran, C.; Keane, J.; Key, K.; Korus, L.; Lee, T.; Leidig, K.; Merchak, E.; Nessmann, K.; Pendyala, S.; Pirkl, S.; Reeder, J.; Roos, A.; Rounseville, S.; Ruddy, E.; Schlingman, A.; Schlingman, W.; Schwartzman, E.; Shanmugam, V.; Silver, E.; Stein, A.; Stock, N.; Svoboda, B.; Thomas, B.; Thomas, N.; Thompson-Taylor, K.; Walton, H.

    2015-01-01

    We report spectroscopic classification of ASASSN-15lu (ATel #7698) in SDSS J132112.88+401556.7 (z=0.035037, via NED) through inspection of an optical spectrum (range 370-680 nm, resolution 0.8 nm), obtained with the 2.3-m Bok telescope (+ Boller & Chivens spectrograph) at Kitt Peak on 2015 June 24.2

  19. Recycling of Plastic

    DEFF Research Database (Denmark)

    Christensen, Thomas Højlund; Fruergaard, Thilde

    2011-01-01

    Plastic is produced from fossil oil. Plastic is used for many different products. Some plastic products like, for example, wrapping foil, bags and disposable containers for food and beverage have very short lifetimes and thus constitute a major fraction of most waste. Other plastic products like......, good strength and long durability. Recycling of plastic waste from production is well-established, while recycling of postconsumer plastic waste still is in its infancy. This chapter describes briefly how plastic is produced and how waste plastic is recycled in the industry. Quality requirements...

  20. Luminescence and scintillation properties of BaY2F8 : Ce3+, BaLu2F8 and BaLu2F8 : Ce3+

    NARCIS (Netherlands)

    van't Spijker, JC; Dorenbos, P; van Eijk, CWE; Jacobs, JEM; den Hartog, HW; Korolev, N

    1999-01-01

    Spectroscopic and scintillation properties of BaY2F8 :Ce3+, BaLu2F8 and BaLu2F8 :Ce3+ are presented. For pure BaLu2F8, a luminescence with a decay time of similar to 1 ns is observed under gamma-ray excitation. This luminescence with a light yield of about 200 ph/MeV is attributed to core-valence

  1. 锡林河流域草原植物群落分类及其多样性分析%Grassland Plant Communities Classification and Diversity Analysis in the Xilin River Basin

    Institute of Scientific and Technical Information of China (English)

    席小康; 朱仲元; 郝祥云

    2016-01-01

    研究锡林河流域草原群落的分类和群落多样性分布特征,可为寒旱区草原的合理利用和保护提供重要依据。基于流域植物群落的样方调查与TWINSPAN分类,得出锡林河流域主要植物群落类型以及影响群落类型和多样性变化的环境因子。结果表明,(1)锡林河流域草原可划分为5个群落类型,分别为大针茅Stipa grandis+羊草Leymus chinensis+黄囊苔草Carex korshinskyi群丛、羊草+大针茅+糙隐子草Cleistogenes squarrosa群丛、羊草+黄囊苔草+灰绿藜Chenopodium glaucum群丛、羊草+糙隐子草+灰绿藜群丛、糙隐子草+灰绿藜+猪毛菜Salsola collina群丛。(2)不同群落α多样性3种指数具有一致的变化趋势,而土壤类型、水分状况以及人类活动强度的差异导致了群落多样性的不同。(3)不同群落类型之间物种组成与更替速率不尽相同。从相异性指数来看,大针茅+羊草+黄囊苔草群落与羊草+黄囊苔草+灰绿藜群落之间共有种最多,物种组成差异性最低,相似性最高,群落间变异程度最小;在羊草+大针茅+糙隐子草群落与羊草+黄囊苔草+灰绿藜群落之间共有种最少,物种组成差异性最大,相似性最低,群落间变异程度最大。从Cody 指数来看,羊草+大针茅+糙隐子草群落与羊草+糙隐子草+灰绿藜群落物种的更替速率最慢,而羊草+大针茅+糙隐子草群落与羊草+黄囊苔草+灰绿藜群落的更替速率最快。%The research on the classification of plant communities and diversity distribution characteristics in the Xilin River Basin, can provide important basis for Cold and arid regions of the grassland rational use and protection. Based on the basin of plant community field investigation and classified the plant communities by two-way indicators species analysis (TWINSPAN). it is concluded that the main types of plant communities and environmental factors that result

  2. Planning and Research on the Landscape Figuring for Mountain-River Type Small Town -- Take the Urban Landscape Planning of Baise City Xilin County as the Example%山水型小城镇景观风貌塑造的规划探索--以百色市西林县城市景观风貌规划为例

    Institute of Scientific and Technical Information of China (English)

    张晓夏; 陶月华

    2014-01-01

    当今,许多城市的建设面临特色缺失的危机。而百色市西林县城市景观风貌规划从如何塑造山水型小城镇景观风貌这一根本目的出发,采用以景观控制规划引导、指导城市建设的规划理念,运用系统控制的方法,彰显出了独具个性的城市景观风貌特征。%Nowadays, many urban constructions face the crisis that lacking of characteristic. Starting from how to shape the mountain-river type smal town landscape, the landscape planning of Baise city Xilin county adheres to the philosophy that landscapes control the planning and guide the urban co- nstruction and use the systematicaly control method, which highlight the unique characteristics of urban landscape.

  3. Characterization of land cover types in Xilin River Basin using multi-temporal Landsat images%基于多时相陆地卫星图像的锡林河流域土地覆盖类型特征

    Institute of Scientific and Technical Information of China (English)

    2003-01-01

    This study conducted computer-aided image analysis of land use and land cover in XilinRiver Basin, Inner Mongolia, using 4 sets of Landsat TM/ETM+ images acquired on July 31, 1987,August 11, 1991, September 27, 1997 and May 23, 2000, respectively. Primarily, 17 sub-class landcover types were recognized, including nine grassland types at community level: F. sibiricum steppe,S. baicalensis steppe, A. chinensis + forbs steppe, A. chinensis + bunchgrass steppe, A. chinensis +Ar. frigida steppe, S. grandis + A. chinensis steppe, S. grandis + bunchgrass steppe, S. krylavii steppe,Ar. frigida steppe and eight non-grassland types: active cropland, harvested cropland, urban area,wetland, desertified land, saline and alkaline land, cloud, water body + cloud shadow. To eliminatethe classification error existing among different sub-types of the same gross type, the 17 sub-classland cover types were grouped into five gross types: meadow grassland, temperate grassland, desertgrassland, cropland and non-grassland. The overall classification accuracy of the five land cover typeswas 81.0% for 1987, 81.7% for 1991, 80.1% for 1997 and 78.2% for 2000.

  4. LuAG:Ce fibers for high energy calorimetry

    CERN Document Server

    Dujardin, C; Ledoux, G; Perrodin, D; Ovanesyan, K L; Amans, D; Abler, D; Petrosyan, A; Auffray, E; Mancini, C

    2010-01-01

    The main objective of this contribution is to point out the potentialities of cerium doped LuAG single crystal as pixels and fibers. We first show that after optimization of growth conditions using Bridgman technology, this composition exhibits very good performances for scintillating applications (up to 26 000 photons/MeV). When grown with the micropulling down technology, fiber shapes can be obtained while the intrinsic performances are preserved. For the future high energy experiments requiring new detector concepts capable of delivering much richer informations about x- or gamma-ray energy deposition, unusual fiber shaped dense materials need to be developed. We demonstrate in this frame that cerium doped LuAG is a serious candidate for the next generation of ionizing radiation calorimeters. (C) 2010 American Institute of Physics. {[}doi: 10.1063/1.3452358

  5. First photometric study of W UMa binary star LU Lac

    Science.gov (United States)

    Liao, W.-P.; Qian, S.-B.; Zhao, E.-G.; Jiang, L.-Q.

    2014-08-01

    LU Lac is a neglected W UMa binary star in photometric investigations. In this paper, we present BVRI CCD photometric light curves obtained on one night in 2012. The first photometric solutions of this system are computed by using the Wilson-Devinney code. It is shown that LU Lac is a marginal contact W-type system with a degree of contact factor of f=8.9%, a mass ratio of q=2.085 and a high inclination of i=82°.20. From the first analyses of orbital period changes, we found the period variation of the system includes an oscillation (A3=0.0125 days and T3=51.92 years). The cyclic change may be attributed to the light-travel time effect through the presence of a third body.

  6. Uniform, luminescent Eu:LuF{sub 3} nanoparticles

    Energy Technology Data Exchange (ETDEWEB)

    Becerro, Ana I., E-mail: anieto@icmse.csic.es; Gonzalez-Mancebo, Daniel; Ocaña, Manuel [Instituto de Ciencia de Materiales de Sevilla (CSIC-University of Seville) (Spain)

    2015-01-15

    A simple procedure for the synthesis of orthorhombic, uniform, LuF{sub 3} particles with two different morphologies (rhombus- and cocoon-like) and nanometer and sub-micrometer size, respectively, is reported. The method consists in the aging, at 120 °C for 2 h, a solution containing [BMIM]BF{sub 4} ionic liquid (0.5 mL) and lutetium acetate (in the case of the rhombi) or lutetium nitrate (in the case of the cocoons) (0.02 M) in ethylene glycol (total volume 10 mL). This synthesis method was also adequate for the synthesis of Eu{sup 3+}-doped LuF{sub 3} particles of both morphologies, whose luminescence properties were investigated in detail. The experimental observations reported herein suggest that these materials are suitable phosphors for optoelectronic as well as in vitro biotechnological applications.

  7. The Romanian Căluş: Symbol of National Identity

    Directory of Open Access Journals (Sweden)

    Camelia Firică

    2010-12-01

    Full Text Available Of all Romanian dances with ritual functions the most archaic and dynamic is the căluş, a custom of great complexity in its functionality and manifestation, in which dance prevails. Over the course of time, the dance aroused the admiration and interest of many scholars due to the ancient ritual elements it contains, as well as for its spectacular virtuosity and the beauty of the performance and music. The purpose of this study is to reveal the meanings and functions of the căluş, primarily at the social level, in its natural environment – the traditional Romanian village – and to make an analysis of the key moments, the logical order of the dance sequences, gestures and ritual acts, the importance of its props and of group composition and organisation.

  8. Proton emission from an oblate nucleus {sup 151}Lu

    Energy Technology Data Exchange (ETDEWEB)

    Procter, M.G., E-mail: mark.procter@postgrad.manchester.ac.uk [School of Physics and Astronomy, Schuster Laboratory, The University of Manchester, Manchester M13 9PL (United Kingdom); Cullen, D.M.; Taylor, M.J.; Alharshan, G.A. [School of Physics and Astronomy, Schuster Laboratory, The University of Manchester, Manchester M13 9PL (United Kingdom); Ferreira, L.S. [Centro de Física das Interacções Fundamentais, Departamento de Física, Instituto Superior Tecnico, Avenida Rovisco Pais, P1049-001 Lisbon (Portugal); Maglione, E. [Dipartimento di Fisica “G. Galilei”, Istituto Nazionale di Fisica Nucleare, Via Marzolo 8, I-3513, Padova (Italy); Auranen, K.; Grahn, T.; Greenlees, P.T.; Jakobsson, U.; Julin, R.; Herzáň, A.; Konki, J.; Leino, M. [Department of Physics, University of Jyväskylä, FIN-40014 Jyväskylä (Finland); Pakarinen, J. [Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE (United Kingdom); Partanen, J. [Institut für Kernphysik, Universität zu Köln, D-50937, Köln (Germany); Peura, P.; Rahkila, P.; Ruotsalainen, P.; Sandzelius, M. [Department of Physics, University of Jyväskylä, FIN-40014 Jyväskylä (Finland); and others

    2013-08-09

    Excited states in the proton-unbound nucleus {sup 151}Lu have been established using γ-ray coincidence techniques. The lifetime of the first excited state above the proton-emitting ground state has been measured using the recoil-distance Doppler-shift method combined with recoil-decay tagging. The experimental level scheme and extracted lifetime have been compared with state-of-the-art theoretical calculations based upon a non-adiabatic deformed Woods–Saxon potential. This comparison suggests that the proton-emitting ground state in {sup 151}Lu is mildly oblate with a deformation β=−0.11{sub −0.05}{sup +0.02} and represents the best evidence to date for proton emission from an oblate nucleus.

  9. Biokinetic study of free {sup 177}Lu in NIH mice

    Energy Technology Data Exchange (ETDEWEB)

    Villarreal Jimenez, V.; Crudo, J., E-mail: josierys@yahoo.com [Comision Nacional de Energia Atomica (CNEA), Buenos Aires (Argentina); Rojo, A.M.; Deluca, G.M. [Autoridad Regulatoria Nuclear (ARN), Buenos Aires (Argentina)

    2008-07-01

    Full text: {sup 177}Lu has been identified, by the scientific community, as a radionuclide with interesting advantages compared with {sup 90}Y and other beta emitters used in nuclear medicine. This paper analyses the free {sup 177}Lu biokinetic behavior in NIH male mice from activity measurements performed by the Radiopharmacy Division of CNEA (Comision Nacional de Energia Atomica) in the frame of an IAEA (International Atomic Energy Agency) Coordinated Research Project. The study of experimental data is a previous condition that allows drawing the activity-time curves for organs and to know the biodistribution of {sup 177}Lu. The cumulated activity in organs of interest in NIH male mice are calculated and critical organs are identified. The organs selected for analysis in this paper are the liver, kidneys, spleen, stomach, intestine, lungs, skeleton and red marrow. The last one is estimated from the activity measured in blood based on a recognized method published by Sgouros (2000). The results has been extrapolated to human assuming the same biokinetic behaviour as mice being the applicability of the different extrapolation methods also discussed. The direct extrapolation from mice data was the method of election from a radiological protection point of view. The measurement procedures, the data processing, the extrapolation techniques and the analysis performed in this study will contribute as a basis for future research of this group in the area of antibodies and other radiopharmaceutical labeled with {sup 177}Lu. The cumulated activity calculated in each organ is relevant because it makes possible to perform the dose assessment through the application of appropriate dose coefficients. It is a necessary step in order to evaluate the toxicity risk that is required in a pre-clinical study. (author)

  10. Lattice dynamics of LuPO{sub 4}

    Energy Technology Data Exchange (ETDEWEB)

    Nipko, J.C. [Argonne National Lab., IL (United States)]|[Colorado State Univ., Fort Collins, CO (United States); Loong, C.-K. [Argonne National Lab., IL (United States); Loewenhaupt, M. [Technische Univ. Dresden (Germany); Reichardt, W.; Braden, M. [Forschungszentrum Karlsruhe GmbH Technik und Umwelt (Germany); Boatner, L.A. [Oak Ridge National Lab., TN (United States)

    1996-06-01

    Lutetium orthophosphate is an important nonmagnetic host material for rare-earth-activated luminescence applications. We have measured the LuPO{sub 4} phonon density of states and dispersion curves along the [{xi}00],[{xi}{xi}0], and [00{xi}] symmetry directions by neutron spectroscopy using polycrystalline and single-crystal samples. A quantitative analysis of the neutron results was carried out using a lattice-dynamical shell model.

  11. Shape evolution with angular momentum in Lu isotopes

    Science.gov (United States)

    Kardan, Azam; Sayyah, Sepideh

    2016-06-01

    The nuclear potential energies of Lu isotopes with neutron number N = 90 - 98 up to high spins are computed within the framework of the unpaired cranked Nilsson-Strutinsky method. The potential and the macroscopic Lublin-Strasbourg drop (LSD) energy-surface diagrams are analyzed in terms of quadrupole deformation and triaxiality parameter. The shape evolution of these isotopes with respect to angular momentum, as well as the neutron number is studied.

  12. Automatic Blocking Of QR and LU Factorizations for Locality

    Energy Technology Data Exchange (ETDEWEB)

    Yi, Q; Kennedy, K; You, H; Seymour, K; Dongarra, J

    2004-03-26

    QR and LU factorizations for dense matrices are important linear algebra computations that are widely used in scientific applications. To efficiently perform these computations on modern computers, the factorization algorithms need to be blocked when operating on large matrices to effectively exploit the deep cache hierarchy prevalent in today's computer memory systems. Because both QR (based on Householder transformations) and LU factorization algorithms contain complex loop structures, few compilers can fully automate the blocking of these algorithms. Though linear algebra libraries such as LAPACK provides manually blocked implementations of these algorithms, by automatically generating blocked versions of the computations, more benefit can be gained such as automatic adaptation of different blocking strategies. This paper demonstrates how to apply an aggressive loop transformation technique, dependence hoisting, to produce efficient blockings for both QR and LU with partial pivoting. We present different blocking strategies that can be generated by our optimizer and compare the performance of auto-blocked versions with manually tuned versions in LAPACK, both using reference BLAS, ATLAS BLAS and native BLAS specially tuned for the underlying machine architectures.

  13. Development of 177Lu-phytate Complex for Radiosynovectomy

    Directory of Open Access Journals (Sweden)

    Hassan Yousefnia

    2013-05-01

    Full Text Available Objective(s: In this work a new possible agent for radiosynovectomy has been targeted for articular pain palliation. Materials and Methods: Lu-177 of 2.6-3 GBq/mg specific activity was obtained by irradiation of natural Lu2O3 sample with thermal neutron flux of 4 × 1013 n.cm-2.s-1. The product was converted into chloride form which was further used for labeling of 177Lu-phytate complex and checked using ITLC (MeOH: H2O: acetic acid, 4: 4: 2, as mobile phase. The complex stability and viscosity were checked in the final solution up to seven days. The prepared complex solution (100 µCi/100 µl was injected intra-articularly to male rat knee joint. Leakage of radioactivity from injection site and its distribution in organs were investigated up to seven days. Results: The complex was successfully prepared with high radiochemical purity (>99.9 %. Approximately, the whole injected dose has remained in injection site seven days after injection. Conclusion: The complex was proved to be a feasible agent for cavital radiotherapy in oncology and rheumatology

  14. Recycling of Plastic

    DEFF Research Database (Denmark)

    Christensen, Thomas Højlund; Fruergaard, Thilde

    2011-01-01

    Plastic is produced from fossil oil. Plastic is used for many different products. Some plastic products like, for example, wrapping foil, bags and disposable containers for food and beverage have very short lifetimes and thus constitute a major fraction of most waste. Other plastic products like......, for example, gutters, window frames, car parts and transportation boxes have long lifetimes and thus appear as waste only many years after they have been introduced on the market. Plastic is constantly being used for new products because of its attractive material properties: relatively cheap, easy to form......, good strength and long durability. Recycling of plastic waste from production is well-established, while recycling of postconsumer plastic waste still is in its infancy. This chapter describes briefly how plastic is produced and how waste plastic is recycled in the industry. Quality requirements...

  15. An antibody to the lutheran glycoprotein (Lu recognizing the LU4 blood type variant inhibits cell adhesion to laminin α5.

    Directory of Open Access Journals (Sweden)

    Yamato Kikkawa

    Full Text Available BACKGROUND: The Lutheran blood group glycoprotein (Lu, an Ig superfamily (IgSF transmembrane receptor, is also known as basal cell adhesion molecule (B-CAM. Lu/B-CAM is a specific receptor for laminin α5, a major component of basement membranes in various tissues. Previous reports have shown that Lu/B-CAM binding to laminin α5 contributes to sickle cell vaso-occlusion. However, as there are no useful tools such as function-blocking antibodies or drugs, it is unclear how epithelial and sickled red blood cells adhere to laminin α5 via Lu/B-CAM. METHODOLOGY/PRINCIPAL FINDINGS: In this study, we discovered a function-blocking antibody that inhibits Lu binding to laminin α5 using a unique binding assay on tissue sections. To characterize the function-blocking antibody, we identified the site on Lu/B-CAM recognized by this antibody. The extracellular domain of Lu/B-CAM contains five IgSF domains, D1-D2-D3-D4-D5. The antibody epitope was localized to D2, but not to the D3 domain containing the major part of the laminin α5 binding site. Furthermore, mutagenesis studies showed that Arg(175, the LU4 blood group antigenic site, was crucial for forming the epitope and the antibody bound sufficiently close to sterically hinder the interaction with α5. Cell adhesion assay using the antibody also showed that Lu/B-CAM serves as a secondary receptor for the adhesion of carcinoma cells to laminin α5. CONCLUSION/SIGNIFICANCE: This function-blocking antibody against Lu/B-CAM should be useful for not only investigating cell adhesion to laminin α5 but also for developing drugs to inhibit sickle cell vaso-occlusion.

  16. Primary standardization of a {sup 177}Lu solution; Padronizacao primaria de uma solucao de {sup 177}Lu

    Energy Technology Data Exchange (ETDEWEB)

    Iwahara, Akira; Silva, Carlos Jose da; Tauhata, Luiz; Oliveira, Estela Maria de, E-mail: iwahara@ird.gov.b, E-mail: carlos@ird.gov.b, E-mail: tauhata@ird.gov.b, E-mail: estela@ird.gov.b [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil); Rezende, Eduarda Alexandre, E-mail: eduarda@ird.gov.b [Centro Federal de Educacao Tecnologica de Quimica (CEFET), Nilopolis, RJ (Brazil)

    2009-07-01

    For the purpose to make available reliable standards of {sup 177}Lu to the users and producers, a radionuclide solution was standardized using the primary methods of coincidence 4{pi}{beta}(PC)-{gamma}(NaI(Tl)) and of 4{pi}{beta}(LS)-{gamma}(NaI(Tl)). The results presented a convergence in the range of evaluated uncertainties. The standard uncertainties were of the 0.50 and 0.74% for the anticoincidence and coincidence respectively

  17. [On the lecture on the history of anatomy which Lu Xun heard in Sendai].

    Science.gov (United States)

    Sakai, Tatsuo

    2008-12-01

    In "Fujino Sensei," Lu Xun wrote that in his first lecture on anatomy, osteology Professor Fujino talked about the history of anatomy in Japan; although Lu Xun's extant lecture notes do not show any mention of Fujino's comments on the history of anatomy. However, since the lecture notes of senior students mention the history of anatomy, we do not find any reason to assume that Lu Xun did not hear about the history of anatomy in the lecture. Furthermore, the timetable of lectures indicates that the first lecture of anatomy was attributed to Professor Fujino. It is concluded that the description of the first anatomical lecture in "Fujino Sensei" was written based on Lu Xun's actual experience. The lecture on the history of anatomy which Lu Xun heard was made by Professor Fujino; probably based on a lecture by Professor Shikinami which was recorded in the notes of Saito Ryusho, a student who was three years senior to Lu Xun.

  18. LuF[SeO3]: the structural chameleon of lanthanoid fluoride oxoselenates(IV).

    Science.gov (United States)

    Lipp, Christian; Dinnebier, Robert E; Schleid, Thomas

    2013-10-07

    LuF[SeO3] is a compound that can easily be obtained by a solid-state reaction of Lu2O3, LuF3, and SeO2 with CsBr as the fluxing agent. The outstanding property of LuF[SeO3] is the appearance of two phase transitions within a range of less than 200 K. With an increase in the coordination number for Lu(3+) from 7 to 8, the triclinic room-temperature modification changes at temperatures below -40 °C to the monoclinic low-temperature or high-pressure phase of LuF[SeO3]. At the same time, room-temperature modification retains the structure but gains higher symmetry at the second phase transition of around +110 °C. This second transition can even be observed under a microscope using polarized light to see twinning lamellae disappear and reappear during this reversible process.

  19. 77 FR 54930 - Carlyle Plastics and Resins, Formerly Known as Fortis Plastics, A Subsidiary of Plastics...

    Science.gov (United States)

    2012-09-06

    ... Employment and Training Administration Carlyle Plastics and Resins, Formerly Known as Fortis Plastics, A... plastic parts. New information shows that Fortis Plastics is now called Carlyle Plastics and Resins. In... of Carlyle Plastics and Resins, formerly known as Fortis Plastics, a subsidiary of...

  20. LuIII parvovirus selectively and efficiently targets, replicates in, and kills human glioma cells.

    Science.gov (United States)

    Paglino, Justin C; Ozduman, Koray; van den Pol, Anthony N

    2012-07-01

    Because productive infection by parvoviruses requires cell division and is enhanced by oncogenic transformation, some parvoviruses may have potential utility in killing cancer cells. To identify the parvovirus(es) with the optimal oncolytic effect against human glioblastomas, we screened 12 parvoviruses at a high multiplicity of infection (MOI). MVMi, MVMc, MVM-G17, tumor virus X (TVX), canine parvovirus (CPV), porcine parvovirus (PPV), rat parvovirus 1A (RPV1A), and H-3 were relatively ineffective. The four viruses with the greatest oncolytic activity, LuIII, H-1, MVMp, and MVM-G52, were tested for the ability, at a low MOI, to progressively infect the culture over time, causing cell death at a rate higher than that of cell proliferation. LuIII alone was effective in all five human glioblastomas tested. H-1 progressively infected only two of five; MVMp and MVM-G52 were ineffective in all five. To investigate the underlying mechanism of LuIII's phenotype, we used recombinant parvoviruses with the LuIII capsid replacing the MVMp capsid or with molecular alteration of the P4 promoter. The LuIII capsid enhanced efficient replication and oncolysis in MO59J gliomas cells; other gliomas tested required the entire LuIII genome to exhibit enhanced infection. LuIII selectively infected glioma cells over normal glial cells in vitro. In mouse models, human glioblastoma xenografts were selectively infected by LuIII when administered intratumorally; LuIII reduced tumor growth by 75%. LuIII also had the capacity to selectively infect subcutaneous or intracranial gliomas after intravenous inoculation. Intravenous or intracranial LuIII caused no adverse effects. Intracranial LuIII caused no infection of mature mouse neurons or glia in vivo but showed a modest infection of developing neurons.

  1. Gamma radiation exposure of accompanying persons due to Lu-177 patients

    Science.gov (United States)

    Kovan, Bilal; Demir, Bayram; Tuncman, Duygu; Capali, Veli; Turkmen, Cuneyt

    2015-07-01

    Neuroendocrine tumours (NET) are cancers usually observed and arisen in the stomach, intestine, pancreas and breathing system. Recently, radionuclide therapy applications with Lu-177 peptide compound are rapidly growing; especially effective clinical results are obtained in the treatment of well-differentiated and metastatic NET. In this treatment, Lu-177-DOTA, a beta emitter radioisotope in the radiopharmaceutical form, is given to the patient by intravenous way. Lu-177 has also gamma rays apart from beta rays. Gamma rays have 175 keV average energy and these gamma rays should be under the control in terms of radiation protection. In this study, we measured the exposure dose from the Lu-177 patient.

  2. The role of phosphates for the Lu-Hf chronology of meteorites

    Science.gov (United States)

    Debaille, Vinciane; Van Orman, James; Yin, Qing-Zhu; Amelin, Yuri

    2017-09-01

    The 176Lu-176Hf isotopic system is widely used for dating and tracing cosmochemical and geological processes, but still suffers from two uncertainties. First, Lu-Hf isochrons for some early Solar System materials have excess slope of unknown origin that should not be expected for meteorites with ages precisely determined with other isotopic chronometers. This observation translates to an apparent Lu decay constant higher than the one calculated by comparing ages obtained with various dating methods on terrestrial samples. Second, unlike the well constrained Sm/Nd value (to within 2%) for the chondritic uniform reservoir (CHUR), the Lu/Hf ratios in chondrites vary up to 18% when considering all chondrites, adding uncertainty to the Lu/Hf CHUR value. In order to better understand the Lu-Hf systematics of chondrites, we analyzed mineral fractions from the Richardton H5 chondrite to construct an internal Lu-Hf isochron, and set up a numerical model to investigate the effect of preferential diffusion of Lu compared to Hf from phosphate, the phase with the highest Lu-Hf ratio in chondrites, to other minerals. The isochron yields an age of 4647 ± 210 million years (Myr) using the accepted 176Lu decay constant of 1.867 ± 0.008 ×10-11yr-1. Combining this study with the phosphate fractions measured in a previous study yields a slope of 0.08855 ± 0.00072, translating to a 176Lu decay constant of 1.862 ± 0.016 ×10-11yr-1 using the Pb-Pb age previously obtained, in agreement with the accepted value. The large variation of the Lu/Hf phosphates combined with observations in the present study identify phosphates as the key in perturbing Lu-Hf dating and generating the isochron slope discrepancy. This is critical as apatite has substantially higher diffusion rates of rare earth elements than most silicate minerals that comprise stony meteorites. Results of numerical modeling depending of temperature peak, size of the grains and duration of the metamorphic event, show that

  3. Our plastic age

    National Research Council Canada - National Science Library

    Richard C. Thompson; Shanna H. Swan; Charles J. Moore; Frederick S. vom Saal

    2009-01-01

    Within the last few decades, plastics have revolutionized our daily lives. Globally we use in excess of 260 million tonnes of plastic per annum, accounting for approximately 8 per cent of world oil production...

  4. Weinig plastic in vissenmaag

    NARCIS (Netherlands)

    Foekema, E.M.

    2012-01-01

    Waar de magen van sommige zeevogels vol plastic zitten, lijken vissen in de Noordzee nauwelijks last te hebben van kunststofafval. Onderzoekers die plastic resten zochten in vissenmagen vonden ze in elk geval nauwelijks.

  5. Ear Plastic Surgery

    Science.gov (United States)

    ... ENTCareers Marketplace Find an ENT Doctor Near You Ear Plastic Surgery Ear Plastic Surgery Patient Health Information ... they may improve appearance and self-confidence. Can Ear Deformities Be Corrected? Formation of the ear during ...

  6. Scintillation and luminescence properties of Sm3+-activated Lu2O3-CaO-SiO2-B2O3 (LuCSB) scintillating glasses

    Science.gov (United States)

    Kirdsiri, K.; Kaewkhao, J.; Park, J. M.; Ha, D. H.

    2016-09-01

    Lutetium (Lu) is a high atomic number material and readily interacts with X-rays, which makes it a good scintillation material. In this work, Lu-glass scintillators from the series xSm2O3: 25Lu2 O3: 10SiO2: 10CaO: (55- x)B2O3 (LuCSB) were synthesized at 1500 ° C by using a simple melt quenching technique. The influence of the Sm3+ ion on their physical, optical, photo-, X-rayand proton-induced properties has been characterized. The amorphous nature of the samples was confirmed by using X-ray diffraction. The density and the molar volume were found to be increased at higher concentrations of Sm3+. The X-ray- and the proton-induced emission spectra of the Sm3+:LuCSB glasses showed an intense reddish-orange emission around 604 nm (4G5/2 → 6H7/2), which matched the photoluminescence (PL) emission spectrum well. Among the prepared glasses, the 1.0-mol% Sm3+ ion-activated LuCSB glass exhibited the highest value of the characteristic emission parameters. The X-ray-induced luminescence of the LuCSB glass was also compared with that of a commercial bismuth germinate Bi4Ge3O12 (BGO) crystal.

  7. Biodegradability of Plastics

    OpenAIRE

    Yutaka Tokiwa; Calabia, Buenaventurada P.; Charles U. Ugwu; Seiichi Aiba

    2009-01-01

    Plastic is a broad name given to different polymers with high molecular weight, which can be degraded by various processes. However, considering their abundance in the environment and their specificity in attacking plastics, biodegradation of plastics by microorganisms and enzymes seems to be the most effective process. When plastics are used as substrates for microorganisms, evaluation of their biodegradability should not only be based on their chemical structure, but also on their physical ...

  8. Chemical Recycle of Plastics

    Directory of Open Access Journals (Sweden)

    Sara Fatima

    2014-11-01

    Full Text Available Various chemical processes currently prevalent in the chemical industry for plastics recycling have been discussed. Possible future scenarios in chemical recycling have also been discussed. Also analyzed are the effects on the environment, the risks, costs and benefits of PVC recycling. Also listed are the various types of plastics and which plastics are safe to use and which not after rcycle

  9. Plastic value chains

    DEFF Research Database (Denmark)

    Baxter, John; Wahlstrom, Margareta; Zu Castell-Rüdenhausen, Malin

    2014-01-01

    Optimizing plastic value chains is regarded as an important measure in order to increase recycling of plastics in an efficient way. This can also lead to improved awareness of the hazardous substances contained in plastic waste, and how to avoid that these substances are recycled. As an example...

  10. Biodegradability of plastics.

    Science.gov (United States)

    Tokiwa, Yutaka; Calabia, Buenaventurada P; Ugwu, Charles U; Aiba, Seiichi

    2009-08-26

    Plastic is a broad name given to different polymers with high molecular weight, which can be degraded by various processes. However, considering their abundance in the environment and their specificity in attacking plastics, biodegradation of plastics by microorganisms and enzymes seems to be the most effective process. When plastics are used as substrates for microorganisms, evaluation of their biodegradability should not only be based on their chemical structure, but also on their physical properties (melting point, glass transition temperature, crystallinity, storage modulus etc.). In this review, microbial and enzymatic biodegradation of plastics and some factors that affect their biodegradability are discussed.

  11. Plastic value chains

    DEFF Research Database (Denmark)

    Baxter, John; Wahlstrom, Margareta; Zu Castell-Rüdenhausen, Malin

    2014-01-01

    Optimizing plastic value chains is regarded as an important measure in order to increase recycling of plastics in an efficient way. This can also lead to improved awareness of the hazardous substances contained in plastic waste, and how to avoid that these substances are recycled. As an example......, plastics from WEEE is chosen as a Nordic case study. The project aims to propose a number of improvements for this value chain together with representatives from Nordic stakeholders. Based on the experiences made, a guide for other plastic value chains shall be developed....

  12. Biodegradability of Plastics

    Directory of Open Access Journals (Sweden)

    Yutaka Tokiwa

    2009-08-01

    Full Text Available Plastic is a broad name given to different polymers with high molecular weight, which can be degraded by various processes. However, considering their abundance in the environment and their specificity in attacking plastics, biodegradation of plastics by microorganisms and enzymes seems to be the most effective process. When plastics are used as substrates for microorganisms, evaluation of their biodegradability should not only be based on their chemical structure, but also on their physical properties (melting point, glass transition temperature, crystallinity, storage modulus etc.. In this review, microbial and enzymatic biodegradation of plastics and some factors that affect their biodegradability are discussed.

  13. Journal of CHINA PLASTICS

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    Journal of CHINA PLASTICS was authorized and approved by The State Committee of Science and Technology of China and The Bureau of News Press of China, and published by The China Plastics Processing Industry Association,Beijing Technology and Business University and The Institute of Plastics Processing and Application of Light Industry, distributed worldwide. Since its birth in 1987, CHINA PLASTICS has become a leading magazine in plastics industry in China, a national Chinese core journal and journal of Chinese scientific and technological article statistics. It is covered by CA.

  14. Lu-177-Labeled Zirconia Particles for Radiation Synovectomy.

    Science.gov (United States)

    Polyak, Andras; Nagy, Lívia Naszályi; Drotár, Eszter; Dabasi, Gabriella; Jóba, Róbert P; Pöstényi, Zita; Mikolajczak, Renata; Bóta, Attila; Balogh, Lajos

    2015-12-01

    The present article describes the preparation of β-emitter lutetium-177-labeled zirconia colloid and its preliminary physicochemical and biological evaluation of suitability for local radionuclide therapy. The new (177)Lu-labeled therapeutic radiopharmaceutical candidate was based on the synthesis mode of a previously described zirconia nanoparticle system. The size and shape of the developed radiopharmaceutical compound were observed through a scanning electron microscope and dynamic light scattering methods. The radiocolloid had a 1.7 μm mean diameter and showed high in vitro radiochemical and colloid size stability at room temperature and during the blood sera stability test. After the in vitro characterizations, the product was investigated in the course of the treatment of a spontaneously diseased dog veterinary patient's hock joint completed with single-photon emission computed tomography (SPECT) imaging follow-up measurements and a dual-isotope SPECT imaging tests with conventional (99m)Tc-methanediphosphonic acid bone scintigraphy. In the treated dog, no clinical side-effects or signs of histopathological changes of the joints were recorded during the treatment. SPECT follow-up studies clearly and conspicuously showed the localization of the (177)Lu-labeled colloid in the hock joint as well as detectable but negligible leakages of the radiocolloid in the nearest lymph node. On the basis of biological follow-up tests, the orthopedic team assumed that the (177)Lu-labeled zirconia colloid-based local radionuclide therapy resulted in a significant and long-term improvement in clinical signs of the patient without any remarkable side-effects.

  15. Conversion coefficient measurements of 176Lu using ICEBall

    Science.gov (United States)

    Battaglia, Anthony A.

    We have studied the multipolarites of several transitions in the nucleus 176Lu. The synthesis of 176Lu in stellar environments is through the slow (s-) neutron capture process. The s-process is responsible for the creation of 50% of the heavy elements and 15-20 nuclei in the s-process are s-process branching points. Branching points determine if the synthesis path will beta-decay or neutron capture. The branching point 176 Lu is only produced via the s-process only and has both a long-lived ground state (K = 7--) of 37.6 Gy and a short-lived isomeric state (K = 0--) at 3.6 h. There is no direct decay to both the isomer and ground state due to selection rules. However, an intermediate state was found at 839 keV in the K = 4-- band and another intermediate state in the K = 4+ band at 709 keV which communicate to both the isomer and ground state. The communication to both the isomer and ground state through the intermediate states affects the final abundances of 176Lu in stellar environments which is sensitive to temperature. The experiment was performed at the University of Notre Dame Nuclear Science Laboratory (NSL) using a 176Yb(p,n) reaction at 7.75 MeV. Gamma-gamma and gamma-electron coincidences were measured for conversion coefficients using the Internal Conversion Electron Ball (ICEBall) array and two HPGe detectors (109% relative efficiency of a 3"x 3" NaI detector at 1332 keV). ICEBall was upgraded at the NSL for an improved efficiency from 6%-15% over 4. A total of 40 conversion cofficcients were measured and 35 multipolarities wer assigned. 17 new conversion coefficients were measured and the corresponding multipolarities were assigned. Levels and spin assignments in both the K = 4+ band and K = 4-- band were verified in the intermediate states that are important for establishing a thermal equilibrium in the s-process.

  16. Challenges in plastics recycling

    DEFF Research Database (Denmark)

    Pivnenko, Kostyantyn; Jakobsen, L. G.; Eriksen, Marie Kampmann

    2015-01-01

    Recycling of waste plastics still remains a challenging area in the waste management sector. The current and potential goals proposed on EU or regional levels are difficult to achieve, and even to partially fullfil them the improvements in collection and sorting should be considerable. A study...... was undertaken to investigate the factors affecting quality in plastics recycling. The preliminary results showed factors primarily influencing quality of plastics recycling to be polymer cross contamination, presence of additives, non-polymer impurities, and polymer degradation. Deprivation of plastics quality......, with respect to recycling, has been shown to happen throughout the plastics value chain, but steps where improvements may happen have been preliminary identified. Example of Cr in plastic samples analysed showed potential spreading and accumulation of chemicals ending up in the waste plastics. In order...

  17. Glassy metallic plastics

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    This paper reports a class of bulk metallic glass including Ce-, LaCe-, CaLi-, Yb-, and Sr-based metallic glasses, which are regarded as glassy metallic plastics because they combine some unique properties of both plastics and metallic alloys. These glassy metallic plastics have very low glass transition temperature (Tg~25oC to 150oC) and low Young’s modulus (~20 GPa to 35 GPa). Similar to glassy plastics, these metallic plastics show excellent plastic-like deformability on macro-, micro- and even nano-scale in their supercooled liquid range and can be processed, such as elongated, compressed, bent, and imprinted at low temperatures, in hot water for instance. Under ambient conditions, they display such metallic properties as high thermal and electric conductivities and excellent mechanical properties and other unique properties. The metallic plastics have potential applications and are also a model system for studying issues in glass physics.

  18. Influencing factors and partitioning of respiration in a Leymus chinensis steppe in Xilin River Basin, Inner Mongolia, China%内蒙古锡林河流域羊草草原植物生长旺季呼吸的影响因素分析和区分

    Institute of Scientific and Technical Information of China (English)

    耿元波; 罗光强

    2011-01-01

    Based on the static opaque chamber method, the respiration rates of soil microbial respiration, soil respiration, and ecosystem respiration were measured through continuous in-situ experiments during rapid growth season in semiarid Leymus chinensis steppe in the Xilin River Basin of Inner Mongolia, China. Soil temperature and moisture were the main factor affecting respiration rates. Soil temperature can explain most CO2 efflux variations (R2=0.376-0.655) excluding data of low soil water conditions. Soil moisture can also effectively explain most of the variations of soil and ecosystem respiration (R2=0.314-0.583), but it can not explain much of the variation of microbial respiration (R2=0.063). Low soil water content (≤5%) inhibited CO2 efflux though the soil temperature was high. Rewetting the soil after a long drought resulted in substantial increases in CO2 flux at high temperature. Bivariable models based on soil temperature at 5 cm depth and soil moisture at 0-10 cm depth can explain about 70% of the variations of CO2 effluxes. The contribution of soil respiration to ecosystem respiration averaged 59.4%, ranging from 47.3% to 72.4%; the contribution of root respiration to soil respiration averaged 20.5%, ranging from 11.7% to 51.7%. The contribution of soil to ecosystem respiration was a little overestimated and root to soil respiration little underestimated because of the increased soil water content that occurred as a result of plant removal.

  19. Investigation on quality of high fluorine water in chagan coal mine of Xilin gol league,Jizhong Energy Fengfeng Group%冀中能源峰峰集团有限公司锡林郭勒盟查干淖尔煤矿高氟水质情况调查

    Institute of Scientific and Technical Information of China (English)

    黄徽; 马国安

    2012-01-01

    目的:了解锡林郭勒盟查干淖尔煤矿高氟水质情况,预防地方病和职业性氟中毒.方法:按照GB/T5750 - 2006《生活饮用水标准检验方法》进行.结果:依据GB5749 - 2006《生活饮用水卫生标准》进行判定.结论:氟化物含量达到2.55 mg/L,长此以往饮用高氟水,必然形成高氟地方病、地方性氟中毒,势必对人体健康产生严重危害,对生产经营造成严重影响,形成职业性氟中毒.%Objective;To prevent the endemic diseases and professional-fluorosis by getting to know the quality of high fluorine water in Chagan coal mine of Xilin Gol league. Methods; The quality detection was done according to GB/T5750 - 2006 " Standard Examination Methods for Drinking Water". Results: To draw the conclusion according to GB5749 - 2006 " Hygiene standards for drinking water". Conclusion: The fluoride content in water was 2.55 mg/L. If taken continuously, the water will definitely lead to the endemic diseases and the professional fluorosis. Human's health and local production and operation will be affected as well.

  20. Negative thermal expansion and anomalies of heat capacity of LuB50 at low temperatures.

    Science.gov (United States)

    Novikov, V V; Zhemoedov, N A; Matovnikov, A V; Mitroshenkov, N V; Kuznetsov, S V; Bud'ko, S L

    2015-09-28

    Heat capacity and thermal expansion of LuB50 boride were experimentally studied in the 2-300 K temperature range. The data reveal an anomalous contribution to the heat capacity at low temperatures. The value of this contribution is proportional to the first degree of temperature. It was identified that this anomaly in heat capacity is caused by the effect of disorder in the LuB50 crystalline structure and it can be described in the soft atomic potential model (SAP). The parameters of the approximation were determined. The temperature dependence of LuB50 heat capacity in the whole temperature range was approximated by the sum of SAP contribution, Debye and two Einstein components. The parameters of SAP contribution for LuB50 were compared to the corresponding values for LuB66, which was studied earlier. Negative thermal expansion at low temperatures was experimentally observed for LuB50. The analysis of the experimental temperature dependence for the Gruneisen parameter of LuB50 suggested that the low-frequency oscillations, described in SAP mode, are responsible for the negative thermal expansion. Thus, the glasslike character of the behavior of LuB50 thermal characteristics at low temperatures was confirmed.

  1. Influence of magnetic on ferroelectric ordering in LuMnO3

    NARCIS (Netherlands)

    Van Aken, BB; Palstra, TTM

    2004-01-01

    We have studied the influence of antiferromagnetic ordering on the local dielectric moments of the MnO5 and LuO7 polyhedra by measuring neutron powder-diffraction patterns of LuMnO3 at temperatures near T-N. We show that the coupling is weak, because the magnetic exchange coupling is predominantly i

  2. Lu AA21004, a novel multimodal antidepressantwith activity exerted through serotonergic targets

    DEFF Research Database (Denmark)

    Mork, A.; Pehrson, A.; Montezinho, L. C. P.;

    2012-01-01

    Background: Lu AA21004 is a multimodal antidepressant that functions as a 5-HT3 and 5-HT7 receptor antagonist, 5-HT1B receptor partial agonist, 5-HT1A receptor agonist and inhibitor of the 5-HT transporter in vitro. Here we investigated preclinical effects of Lu AA21004 1) on target occupancies, 2...

  3. Port-Hamiltonian description and analysis of the LuGre friction model

    NARCIS (Netherlands)

    Koopman, J.; Jeltsema, D.; Verhaegen, M.H.G.

    2010-01-01

    A port-Hamiltonian formulation of the LuGre friction model is presented that can be used as a building block in the physical modelling of systems with friction. Based on the dissipation structure matrix of this port-Hamiltonian LuGre model, an alternative proof can be given for the passivity conditi

  4. Whole Body Activity Retentions in the Peptide Receptor Radionuclide Therapy with Lu-177

    NARCIS (Netherlands)

    Liu, B.

    2013-01-01

    The patients with the neuroendocrine tumours (liver, spleen, etc.) often need treatment by the Peptide Receptor Radionuclide Therapy with 177Lu. The amount of 177Lu activity in the body of patients has to be known accurately for assessment of the dosimetry and for evaluation of the effectiveness of

  5. Beta-glycosidase (amygdalase and linamarase) from Endomyces fibuliger (LU677): formation and crude enzymes properties.

    NARCIS (Netherlands)

    Brimer, L.; Nout, M.J.R.; Tuncel, G.

    1998-01-01

    In our previous studies, the yeast Endomyces fibuliger LU677 was found to degrade amygdalin in bitter apricot seeds. The present investigation shows that E. fibuliger LU677 produces extracellular beta-glycosidase activity when grown in malt extract broth (MEB). Growth was very good at 25 degrees C

  6. Femtosecond Spectroscopy of LuMnO3

    Science.gov (United States)

    Lou, Shitao; Zimmermann, Frank M.; Bartynski, Robert A.; Hur, Namjun; Cheong, Sang-Wook

    2006-03-01

    Hexagonal LuMnO3 manganite is a ferroelectric and strongly frustrated antiferromagnetic crystal. Strong coupling between lattice, electronic, and magnetic degrees of freedom makes it a promising electronic material. We have used femtosecond pump-probe spectroscopy to study the interaction of electron excitations with lattice vibrations in real time. Optical excitation of a Mn d(x^2-y^2),(xy)->d(3z^2-r^2)transition served as the primary excitation step. With both pump and probe beam polarization perpendicular to the c axis, the probe reflectivity shows a sharp drop due to saturation of the transition, recovering on a timescale of 1 ps. We also observed displacive excitation of a coherent optical phonon vibration at 3.6 THz, which is assigned to an A1 symmetry mode involving Lu ion motion along the c axis. This mode was excited in longitudinal (LO) and transverse mode (TO) geometries. While the LO-TO frequency splitting is small (<0.1 THz), a remarkable phase reversal of the reflectivity curve was observed. This is attributed to a large linear electro-optic effect (Pockels effect), induced by the THz electric field associated with the LO mode.

  7. Green and red luminescence in co-precipitation synthesized Pr:LuAG nanophosphor

    Energy Technology Data Exchange (ETDEWEB)

    Kumar, S. Arun; Kumar, K. Ashok; Gunaseelan, M.; Senthilselvan, J., E-mail: jsselvan@hotmail.com [Department of Nuclear Physics, University of Madras, Guindy Campus, Chennai–600 025, Tamil Nadu (India); Asokan, K. [Materials Science Group, Inter University Accelerator Centre, New Delhi-110067 (India)

    2016-05-06

    Pr:LuAG nanophosphor is an effective candidate in magnetic resonance imaging coupled positron emission tomography (MRI-PET) for medical imaging and scintillator applications. LuAG:Pr (0.05, 0.15 mol%) nanoscale ceramic powders were synthesized by co-precipitation method using urea as precipitant. Effect of antisite defect on structure and luminescence behavior was investigated. Pr:LuAG nanoceramic powders are found crystallized in cubic structure by high temperature calcination at 1400 °C and it shows antisite defect. HR-SEM analysis revealed spherically shaped Pr:LuAG nanoceramic particulate powders with ∼100 nm size. By the excitation at 450 nm, Pr:LuAG nanophosphor exhibit green to red luminescence in the wavelength range of 520 to 680 nm, which is originated from multiplet transition of Pr{sup 3+} ions.

  8. Magnetic properties of Ho1- x Lu x B12 solid solutions

    Science.gov (United States)

    Gabáni, S.; Gaz̆o, E.; Pristás̆, G.; Takác̆ová, I.; Flachbart, K.; Shitsevalova, N.; Siemensmeyer, K.; Sluchanko, N.

    2013-05-01

    Magnetic properties of the geometrically frustrated antiferromagnet HoB12 (with T N = 7.4 K) modified by substitution of magnetic Ho atoms through non-magnetic Lu ones are presented and discussed. In this case, in Ho1- x Lu x B12 solid solutions, both chemical pressure resulting from different Lu3+ and Ho3+ radii and magnetic dilution take place with increasing Lu content ( x) that change properties of the system. The received results show strong indication for the existence of a quantum critical point near x = 0.9, which separates the region of magnetic order (starting with HoB12 for x = 0) and the nonmagnetic region (ending with superconducting LuB12 for x = 1).

  9. Lu AA21004, a novel multimodal antidepressantwith activity exerted through serotonergic targets

    DEFF Research Database (Denmark)

    Mork, A.; Pehrson, A.; Montezinho, L. C. P.

    2012-01-01

    (5-HT), noradrenaline (NA), dopamine (DA), acetylcholine (ACh), histamine (Hist)] were measured by microdialysis. Antidepressant potential was assessed in the forced swim test using Flinders Sensitive Line (FSL) rats. Moreover, effects of Lu AA21004 on acquisition, consolidation and recall...... of contextual memory in rats were studied in the fear conditioning paradigm, and episodic memory was evaluated in the novel object recognition test. Results: Administration of Lu AA21004 (0.1-10 mg/kg, sc) demonstrated that the compound dose-dependently occupied the studied targets. Moreover, Lu AA21004...... increased extracellular levels of 5-HT, NA, DA, ACh and Hist in the brain. Lu AA21004 counteracted the immobility of FSL rats in the forced swim test and enhanced memory of the rats in the cognition models. Conclusions: Lu AA21004 in vivo engages relevant targets and affects several neurotransmitter systems...

  10. Biferroic LuCrO{sub 3}: Structural characterization, magnetic and dielectric properties

    Energy Technology Data Exchange (ETDEWEB)

    Durán, A., E-mail: dural@cnyn.unam.mx [Universidad Nacional Autónoma de México, Centro de Nanociencias y Nanotecnología, Km. 107 Carretera Tijuana-Ensenada, Apartado Postal 14, C.P. 22800 Ensenada, BC (Mexico); Meza F, C.; Morán, E.; Alario-Franco, M.A. [Departamento de Química Inorgánica y Laboratorio Complutense de Altas Presiones, Facultad de Química, Universidad Complutense de Madrid, EU, 28040 Madrid (Spain); Ostos, C., E-mail: ceostoso@gmail.com [Instituto de Química, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín (Colombia)

    2014-02-14

    Multiferroic LuCrO{sub 3} perovskite-type structure (Pbnm) obtained via auto-ignition synthesis was characterized by a combination of X-ray diffraction (XRD) and thermogravimetric (TG) techniques, and through magnetization and permittivity measurements. Results showed that amorphous combustion powders were fully transformed to orthorhombic LuCrO{sub 3} structure at 1200 K after the first LuCrO{sub 4} crystallization at 700 K. The magnetic response displays thermal irreversibility between zero-field-cooling and field-cooling condition which is due to spin canted AF switching at 116 K. Accordingly, a hysteresis loop in the M(H) data confirms weak ferromagnetism in LuCrO{sub 3}. On the other hand, the permittivity measurement shows a broad peak transition typical of relaxor-type ferroelectrics transition at ∼450 K. Electrical conductivity increases as temperature increases showing an anomaly around the diffuse phase transition. The diffuse phase transition and the formation of the charge carriers are discussed in terms of a local distortion around the Lu Site. - Highlights: • Multiferroic LuCrO{sub 3} was successfully obtained via auto-ignition synthesis. • Amorphous powder is transformed first to LuCrO{sub 4} (700 K) and next to LuCrO{sub 3} (1100 K). • The CrO{sub 6} octahedra are tilted away and rotates from the ideal octahedral shape. • LuCrO{sub 3} exhibits a canted AFM transition (116 K) and a relaxor ferroelectric behavior. • Tilting and rotation of CrO{sub 6} octahedra influenced transport properties on LuCrO{sub 3}.

  11. Plastic Pollution from Ships

    OpenAIRE

    Čulin, Jelena; Bielić, Toni

    2016-01-01

    The environmental impact of shipping on marine environment includes discharge of garbage. Plastic litter is of particular concern due to abundance, resistance to degradation and detrimental effect on marine biota. According to recently published studies, a further research is required to assess human health risk. Monitoring data indicate that despite banning plastic disposal at sea, shipping is still a source of plastic pollution. Some of the measures to combat the problem are discussed.

  12. Handbook of Plastic Welding

    DEFF Research Database (Denmark)

    Islam, Aminul

    The purpose of this document is to summarize the information about the laser welding of plastic. Laser welding is a matured process nevertheless laser welding of micro dimensional plastic parts is still a big challenge. This report collects the latest information about the laser welding of plasti...... as a knowledge handbook for laser welding of plastic components. This document should provide the information for all aspects of plastic laser welding and help the design engineers to take all critical issues into consideration from the very beginning of the design phase....

  13. Plastics and health risks.

    Science.gov (United States)

    Halden, Rolf U

    2010-01-01

    By 2010, the worldwide annual production of plastics will surpass 300 million tons. Plastics are indispensable materials in modern society, and many products manufactured from plastics are a boon to public health (e.g., disposable syringes, intravenous bags). However, plastics also pose health risks. Of principal concern are endocrine-disrupting properties, as triggered for example by bisphenol A and di-(2-ethylhexyl) phthalate (DEHP). Opinions on the safety of plastics vary widely, and despite more than five decades of research, scientific consensus on product safety is still elusive. This literature review summarizes information from more than 120 peer-reviewed publications on health effects of plastics and plasticizers in lab animals and humans. It examines problematic exposures of susceptible populations and also briefly summarizes adverse environmental impacts from plastic pollution. Ongoing efforts to steer human society toward resource conservation and sustainable consumption are discussed, including the concept of the 5 Rs--i.e., reduce, reuse, recycle, rethink, restrain--for minimizing pre- and postnatal exposures to potentially harmful components of plastics.

  14. Synaptic Plasticity and Nociception

    Institute of Scientific and Technical Information of China (English)

    ChenJianguo

    2004-01-01

    Synaptic plasticity is one of the fields that progresses rapidly and has a lot of success in neuroscience. The two major types of synaptie plasticity: long-term potentiation ( LTP and long-term depression (LTD are thought to be the cellular mochanisms of learning and memory. Recently, accumulating evidence suggests that, besides serving as a cellular model for learning and memory, the synaptic plasticity involves in other physiological or pathophysiological processes, such as the perception of pain and the regulation of cardiovascular system. This minireview will focus on the relationship between synaptic plasticity and nociception.

  15. Production of {sup 177}Lu for targeted radionuclide therapy: Available options

    Energy Technology Data Exchange (ETDEWEB)

    Dah, Ashutosh [Isotope Production and Applications Division, Bhabha Atomic Research Centre (BARC), Mumbai (India); Pillai, Maroor Raghavan Ambikalmajan [Molecular Group of Companies. Kerala (India); Knapp, Furn F. Jr. [Medical Isotopes Program, Isotope Dept. Group, Oak Ridge National Laboratory (ORNL), Oak Ridge (United States)

    2015-06-15

    This review provides a comprehensive summary of the production of {sup 177}Lu to meet expected future research and clinical demands. Availability of options represents the cornerstone for sustainable growth for the routine production of adequate activity levels of {sup 177}Lu having the required quality for preparation of a variety of {sup 177}Lu-labeled radiopharmaceuticals. The tremendous prospects associated with production of {sup 177}Lu for use in targeted radionuclide therapy (TRT) dictate that a holistic consideration should evaluate all governing factors that determine its success. While both “direct” and “indirect” reactor production routes offer the possibility for sustainable {sup 177}Lu availability, there are several issues and challenges that must be considered to realize the full potential of these production strategies. This article presents a mini review on the latest developments, current status, key challenges and possibilities for the near future. A broad understanding and discussion of the issues associated with {sup 177}Lu production and processing approaches would not only ensure sustained growth and future expansion for the availability and use of {sup 177}Lu-labeled radiopharmaceuticals, but also help future developments.

  16. Adsorption Behavior and Mechanism of Macroporous Phosphonic Acid Resin for Lu3+

    Institute of Scientific and Technical Information of China (English)

    WANG Hui-jun; XIONG Chun-hua

    2006-01-01

    The article is based on a research on the adsorption behavior and adsorption mechanism of macroporous phosphonic acid resin (PAR) for Lu3+ and the influence of the medium's pH, adsorption temperature, adsorption time, etc on adsorbing Lu3 + . The best value of medium's pH to the adsorption of PAR for Lu3 + was found to be 4.92. The static adsorption maximum capacity of PAR for Lu3 + is 220 mg· g-1. The thermodynamic adsorption parameters are respectively △H= 11.3 kJ·mol-1, △S =46.3 J·mol-1 ·K-1, △G = - 2.50 kJ·mol-1 and the apparent activity energy is Ea= 31.4 kJ· mol- 1. The adsorption behavior of PAR for Lu3 + obeys the Freundlich isotherm. The apparent adsorption rate constant is k298 = 4.68 × 10-5 s-1. The coordinate ratio of the functional radical to Lu3 + is approximately 4: 1. The best eluant is 1.0 mol· L- 1 HCl. The adsorption mechanism of PAR for Lu3 + was separately confirmed by chemical analysis and IR spectra.

  17. Co-precipitation synthesis of lutetium aluminum garnet (LuAG) powders: The influence of ethanol

    Science.gov (United States)

    Pan, Liangjie; Jiang, Benxue; Fan, Jintai; Zhang, Pande; Mao, Xiaojian; Zhang, Long

    2017-09-01

    Aluminum Garnet (LuAG) precursors were co-precipitated by using ethanol-water as the precipitant solvent. The effect of different volume ratios of ethanol to water (R) on the preparation of pure-phase LuAG powders has been mainly studied. The evolution of phase, composition and micro-structure of the as-synthesized LuAG powders were characterized by TG/DTA, FTIR, XRD, BET, and SEM. The BET-equivalent diameter of LuAG nano particles increased with R. The ethanol-water solvent does not change the main composition of the LuAG precursors, but has great influence on the morphology of the final LuAG nano particles. Uniformly dispersed LuAG powders calcined at 1200 °C for 3 h with a particle size of approximately 120 nm were obtained by using ethanol-water solvent with proper R = 1. The mechanism of ethanol in the preparation process was discussed.

  18. Multiferroic behavior in Lu2MnCoO6

    Science.gov (United States)

    Zapf, Vivien; Mun, E.-D.; Ueland, B. G.; Thompson, J. D.; Singleton, J.; Gardner, J.; Yáñez-Vilar, S.; Sánchez-Anduacute; jar; , M.; Señaris-Rodriguez, M. A.; Mira, J.; Biskup, N.; Batista, C. D.

    2012-02-01

    Lu2MnCoO6 is a new member of the multiferroics with coupling between net magnetization and net electric polarization. Similar to Ca3MnCoO6, an up-up-down-down order of the magnetic spins is found that breaks spatial-inversion symmetry and creates an electric polarization. Unlike Ca3MnCoO6, the Co and Mn ions are both in a S = 3/2 state, the ordering temperature is 42 K, and the magnetic field needed to suppress electric polarization is 2 T. We present an experimental study of the multiferroic properties and spin structure including neutron diffraction, electric polarization, magnetization, dielectric constant, and specific heat measurements.

  19. Coexisting normal and triaxial superdeformed structures in {sup 165}Lu

    Energy Technology Data Exchange (ETDEWEB)

    Schoenwasser, G.; Nenoff, N.; Huebel, H. E-mail: hubel@iskp.uni-bonn.de; Hagemann, G.B.; Bednarczyk, P.; Benzoni, G.; Bracco, A.; Bringel, P.; Chapman, R.; Curien, D.; Domscheit, J.; Herskind, B.; Jensen, D.R.; Leoni, S.; Lo Bianco, G.; Ma, W.C.; Maj, A.; Neusser, A.; Oedegaard, S.W.; Petrache, C.M.; Rossbach, D.; Ryde, H.; Singh, A.K.; Spohr, K.H

    2004-05-03

    High-spin states in {sup 165}Lu were populated in the {sup 139}La({sup 30}Si,4n) reaction at a beam energy of 152 MeV and {gamma}-ray coincidences were measured with the EUROBALL spectrometer array. Nine new rotational bands were discovered, known band structures were considerably extended and many inter-band transitions were found. Structures with normal deformation coexist with bands associated with the strongly deformed triaxial energy minima found in calculations. Three of these triaxial bands form a family of wobbling excitations with phonon quanta n{sub w}=0, 1 and 2. The wobbling mode is a unique signature of nuclear triaxiality. Configuration assignments are discussed for the observed band structures. An exchange of configuration between two of the new bands due to mixing is observed, resulting in different signature partnerships at low and high spins.

  20. Innovative LuYAP:Ce array for PET imaging

    Science.gov (United States)

    Cinti, M. N.; Scafe, R.; Bennati, P.; Lo Meo, S.; Frantellizzi, V.; Pellegrini, R.; De Vincentis, G.; Sacco, D.; Fabbri, A.; Pani, R.

    2017-03-01

    We present an imaging characterization of a 10 × 10 LuYAP array (2 × 2 × 10 mm3 pixels) with an innovative dielectric coating insulation (0.015 mm thick), in view of its possible use in a gamma camera for imaging positron emission tomography (PET) or in similar applications, e.g. as γ -prompt detector in hadron therapy. The particular assembly of this array was realized in order to obtain a packing fraction of 98%, improving detection efficiency and light collection. For imaging purpose, the array has been coupled with a selected Hamamatsu H10966-100 Multi Anode Photomultiplier read out by a customized 64 independent channels electronics. This tube presents a superbialkali photocathode with 38% of quantum efficiency, permitting to enhance energy resolution and consequently image quality. A pixel identification of about 0.5 mm at 662 keV was obtained, highlighting the potentiality of this detector in PET applications.

  1. Halos of Plastic

    Institute of Scientific and Technical Information of China (English)

    Maya Reid

    2012-01-01

    The halos that span South Africa's coastline are anything but angelic. Fanning out around four major urban centers-Cape Town, Port Elizabeth, East London and Durban-they are made up of innumerable bits and pieces of plastic. As a form of pollution, their shelflife is unfathomable. Plastic is essentially chemically inactive. It's designed to never break down.

  2. Biodegradation of plastics.

    Science.gov (United States)

    Shimao, M

    2001-06-01

    Widespread studies on the biodegradation of plastics have been carried out in order to overcome the environmental problems associated with synthetic plastic waste. Recent work has included studies of the distribution of synthetic polymer-degrading microorganisms in the environment, the isolation of new microorganisms for biodegradation, the discovery of new degradation enzymes, and the cloning of genes for synthetic polymer-degrading enzymes.

  3. Influence of Eu(3+) doping content on antioxidant properties of Lu2O3 sol-gel derived nanoparticles.

    Science.gov (United States)

    Olvera Salazar, Arturo; García Hernández, Margarita; López Camacho, Perla Yolanda; López Marure, Arturo; Reyes de la Torre, Adriana Isabel; Morales Ramírez, Ángel de Jesús; Hernández Santiago, Felipe; Aguilera Vázquez, Luciano

    2016-12-01

    This paper presents the synthesis of pure and europium-doped lutetium oxide (Lu2O3) powders prepared by sol-gel method. The influence of europium ion concentration into Lu2O3 nanocrystallites was investigated for first time in an in vitro system using a modified ABTS radical cation decolorization assay to determine the antioxidant activity. The crystalline structure of Lu2O3 and Eu:Lu2O3 powders was elucidated by XRD obtaining cubic phase in all system without secondary products in accordance with FT-IR results. By TEM and Scherrer equation, it was determined that Lu2O3 and Eu:Lu2O3 powders presented nearly spherical particle morphology with crystallites sizes in the range of 8 to 13nm. The antioxidant assays results revealed that europium ion enhance Lu2O3 powders antioxidant properties, showing that 12.5mol% of europium is sufficient to reach its maximum capacity.

  4. DESIGNERS’ KNOWLEDGE IN PLASTICS

    DEFF Research Database (Denmark)

    Eriksen, Kaare

    2013-01-01

    The Industrial designers’ knowledge in plastics materials and manufacturing principles of polymer products is very important for the innovative strength of the industry, according to a group of Danish plastics manufacturers, design students and practicing industrial designers. These three groups...... answered the first Danish national survey, PD13[1], investigating the importance of industrial designers’ knowledge in plastics and the collaboration between designers and the polymer industry. The plastics industry and the industrial designers collaborate well, but both groups frequently experience...... that the designers’ lack of knowledge concerning polymer materials and manufacturing methods can be problematic or annoying, and design students from most Danish design universities express the need for more contact with the industry and more competencies and tools to handle even simple topics when designing plastic...

  5. Consciousness and neural plasticity

    DEFF Research Database (Denmark)

    In contemporary consciousness studies the phenomenon of neural plasticity has received little attention despite the fact that neural plasticity is of still increased interest in neuroscience. We will, however, argue that neural plasticity could be of great importance to consciousness studies....... If consciousness is related to neural processes it seems, at least prima facie, that the ability of the neural structures to change should be reflected in a theory of this relationship "Neural plasticity" refers to the fact that the brain can change due to its own activity. The brain is not static but rather...... the relation between consciousness and brain functions. If consciousness is connected to specific brain structures (as a function or in identity) what happens to consciousness when those specific underlying structures change? It is therefore possible that the understanding and theories of neural plasticity can...

  6. [{sup 177}Lu]DOTA-anti-CD20: Labeling and pre-clinical studies

    Energy Technology Data Exchange (ETDEWEB)

    Audicio, Paola F., E-mail: paudicio@cin.edu.u [Departamento de Radiofarmacia, Centro de Investigaciones Nucleares, Facultad de Ciencias, Universidad de la Republica, Mataojo 2055, 11400 Montevideo (Uruguay); Castellano, Gustavo, E-mail: gcas@famaf.unc.edu.a [FaMAF, Universidad Nacional de Cordoba, Ciudad Universitaria, 5016 Cordoba (Argentina); Tassano, Marcos R.; Rezzano, Maria E.; Fernandez, Marcelo [Departamento de Radiofarmacia, Centro de Investigaciones Nucleares, Facultad de Ciencias, Universidad de la Republica, Mataojo 2055, 11400 Montevideo (Uruguay); Riva, Eloisa [Clinica Hematologica ' Prof. Dra. L. Diaz' , Hospital de Clinicas. Av. Italia. sn, Montevideo (Uruguay); Robles, Ana; Cabral, Pablo; Balter, Henia; Oliver, Patricia [Departamento de Radiofarmacia, Centro de Investigaciones Nucleares, Facultad de Ciencias, Universidad de la Republica, Mataojo 2055, 11400 Montevideo (Uruguay)

    2011-07-15

    Anti-CD20 (Rituximab), a specific chimeric monoclonal antibody used in CD20-positive Non-Hodgkin's Lymphoma, was conjugated to a bifunctional quelate (DOTA) and radiolabeled with {sup 177}Lu through a simple method. [{sup 177}Lu]-DOTA-anti-CD20 was obtained with a radiochemical purity higher than 97%, and showed good chemical and biological stability, maintaining its biospecificity to CD20 antigens. Monte Carlo simulation showed high doses deposited on a spheroid tumor mass model. This method seems to be an appropriate alternative for the production of [{sup 177}Lu]-DOTA-anti-CD20 as therapeutic radiopharmaceutical.

  7. Predicting the yield of {sup 177}Lu radionuclide produced by the cyclic irradiation technique

    Energy Technology Data Exchange (ETDEWEB)

    Odame Duodu, Godfred, E-mail: jogd14@yahoo.co [Radiological and Medical Sciences Research Institute, Ghana Atomic Energy Commission, P.O. Box LG80, Legon Accra (Ghana); Akaho, Edward H.K.; Serfor-Armah, Yaw [Ghana Atomic Energy Commission, P.O. Box LG80, Legon Accra (Ghana); Nyarko, Benjamin J.B. [National Nuclear Research Institute, Ghana Atomic Energy Commission, P.O. Box LG80, Legon Accra (Ghana); Afi Achoribo, Elom [Radiological and Medical Sciences Research Institute, Ghana Atomic Energy Commission, P.O. Box LG80, Legon Accra (Ghana)

    2011-03-15

    The feasibility study on the production of {sup 177}Lu radioisotope using a low power research reactor has been conducted. A reliable method for predicting the yield of {sup 177}Lu produced using the cyclic activation technique based on the Westcott formalism has been established. A specific activity of 243.24 mCi/g was obtained when a {sup 176}Lu{sub 2}O{sub 3} of natural abundance was irradiated for 4 h and decayed for 20 h for four cycles at GHARR-1 with a neutron flux of 5.0x10{sup 11} ncm{sup -2} s{sup -1}.

  8. Lu-hf total-rock isochron for the eucrite meteorites

    Science.gov (United States)

    Patchett, P.J.; Tatsumoto, M.

    1980-01-01

    The isotope 176Lu (2.6% of natural lutetium) decays by ??- to 176Hf, with a long half life. We present here the first Lu-Hf isochron. The eucrite meteorites, a suite of planetary igneous rocks of known age, 4,550 Myr, define a 10-point total-rock isochron with a slope of 0.0934 ?? 40, leading to a value of 3.53 ?? 0.14 ??1010yr for the ??--decay half life of 176Lu. The isochron intercept of 0.27973 ?? 12 gives the initial 176Hf/177Hf for the inner Solar System at the time of accretion. ?? 1980 Nature Publishing Group.

  9. Langston University - High Energy Physics (LU-HEP)

    Energy Technology Data Exchange (ETDEWEB)

    Snow, Dr., Joel [Langston Univ., OK (United States)

    2012-08-13

    This final report is presented by Langston University (LU) for the project entitled "Langston University High Energy Physics" (LUHEP) under the direction of principal investigator (PI) and project director Professor Joel Snow. The project encompassed high energy physics research performed at hadron colliders. The PI is a collaborator on the DZero experiment at Fermi National Accelerator Laboratory in Batavia, IL, USA and the ATLAS experiment at CERN in Geneva, Switzerland and was during the entire project period from April 1, 1999 until May 14, 2012. Both experiments seek to understand the fundamental constituents of the physical universe and the forces that govern their interactions. In 1999 as member of the Online Systems group for Run 2 the PI developed a cross-platform Python-based, Graphical User Interface (GUI) application for monitoring and control of EPICS based devices for control room use. This served as a model for other developers to enhance and build on for further monitoring and control tasks written in Python. Subsequently the PI created and developed a cross-platform C++ GUI utilizing a networked client-server paradigm and based on ROOT, the object oriented analysis framework from CERN. The GUI served as a user interface to the Examine tasks running in the D\\O\\ control room which monitored the status and integrity of data taking for Run 2. The PI developed the histogram server/control interface to the GUI client for the EXAMINE processes. The histogram server was built from the ROOT framework and was integrated into the D\\O\\ framework used for online monitoring programs and offline analysis. The PI developed the first implementation of displaying histograms dynamically generated by ROOT in a Web Browser. The PI's work resulted in several talks and papers at international conferences and workshops. The PI established computing software infrastructure at LU and U. Oklahoma (OU) to do analysis of DZero production data and produce simulation

  10. Influence of magnetic on ferroelectric ordering in LuMnO3

    Science.gov (United States)

    van Aken, Bas B.; Palstra, Thomas T.

    2004-04-01

    We have studied the influence of antiferromagnetic ordering on the local dielectric moments of the MnO5 and LuO7 polyhedra by measuring neutron powder-diffraction patterns of LuMnO3 at temperatures near TN. We show that the coupling is weak, because the magnetic exchange coupling is predominantly in the ab plane of the MnO5 trigonal bipyramids, and the electric dipole moments, originating in the LuO7 polyhedra, are oriented along the hexagonal c axis. Anomalies in the dielectric properties near TN are thus caused by the geometric constraints between the MnO5 and the LuO7 polyhedra.

  11. Algorithms for numerical and symbolic analysis of linear circuits and methods of derivatives LU-decomposition

    Directory of Open Access Journals (Sweden)

    V. A. Golovin

    1986-04-01

    Full Text Available The algorithms of numerical and symbolic analysis methods of linear chains of derivatives and LU-decomposition. An example of the calculation circuit functions using programs that implement the proposed algorithms.

  12. Intrinsic magnetic properties of hexagonal LuFeO3 and the effects of nonstoichiometry

    Directory of Open Access Journals (Sweden)

    Jarrett A. Moyer

    2014-01-01

    Full Text Available We used oxide molecular-beam epitaxy in a composition-spread geometry to deposit hexagonal LuFeO3 (h-LuFeO3 thin films with a monotonic variation in the Lu/Fe cation ratio, creating a mosaic of samples that ranged from iron rich to lutetium rich. We characterized the effects of composition variation with x-ray diffraction, atomic force microscopy, scanning transmission electron microscopy, and superconducting quantum interference device magnetometry. After identifying growth conditions leading to stoichiometric film growth, an additional sample was grown with a rotating sample stage. From this stoichiometric sample, we determined stoichiometric h-LuFeO3 to have a TN = 147 K and Ms = 0.018 μB/Fe.

  13. Predictor-Corrector LU-SGS Discontinuous Galerkin Finite Element Method for Conservation Laws

    National Research Council Canada - National Science Library

    Ma, Xinrong; Liu, Sanyang; Xie, Gongnan

    2015-01-01

      Efficient implicit predictor-corrector LU-SGS discontinuous Galerkin (DG) approach for compressible Euler equations on unstructured grids is investigated by adding the error compensation of high-order term...

  14. lu ja liikumine kui ruumipraktikad = Memory and motion as spatial practices / Morten Lund

    Index Scriptorium Estoniae

    Lund, Morten, 1972-

    2015-01-01

    Artiklis on käsitletud nelja uurimust ruumist, mis illustreerivad võimalusi, kuidas sisearhitektuur võib kaasata mälu ja liikumise kui ruumilised praktikad läbi ruumilise kunsti ning 1:1 eksperimentide

  15. Gamma radiation exposure of accompanying persons due to Lu-177 patients

    Directory of Open Access Journals (Sweden)

    Kovan Bilal

    2015-01-01

    Full Text Available Neuroendocrine tumours (NET are cancers usually observed and arisen in the stomach, intestine, pancreas and breathing system. Recently, radionuclide therapy applications with Lu-177 peptide compound are rapidly growing; especially effective clinical results are obtained in the treatment of well-differentiated and metastatic NET. In this treatment, Lu-177-DOTA, a beta emitter radioisotope in the radiopharmaceutical form, is given to the patient by intravenous way. Lu-177 has also gamma rays apart from beta rays. Gamma rays have 175 keV average energy and these gamma rays should be under the control in terms of radiation protection. In this study, we measured the exposure dose from the Lu-177 patient.

  16. lu ja liikumine kui ruumipraktikad = Memory and motion as spatial practices / Morten Lund

    Index Scriptorium Estoniae

    Lund, Morten, 1972-

    2015-01-01

    Artiklis on käsitletud nelja uurimust ruumist, mis illustreerivad võimalusi, kuidas sisearhitektuur võib kaasata mälu ja liikumise kui ruumilised praktikad läbi ruumilise kunsti ning 1:1 eksperimentide

  17. Intrinsic magnetic properties of hexagonal LuFeO{sub 3} and the effects of nonstoichiometry

    Energy Technology Data Exchange (ETDEWEB)

    Moyer, Jarrett A., E-mail: moyerja@illinois.edu, E-mail: schlom@cornell.edu; Schiffer, Peter [Department of Physics and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States); Misra, Rajiv [Department of Physics, Pennsylvania State University, University Park, Pennsylvania 16802 (United States); Mundy, Julia A. [School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853 (United States); Brooks, Charles M.; Heron, John T. [Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853 (United States); Muller, David A. [School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853 (United States); Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853 (United States); Schlom, Darrell G., E-mail: moyerja@illinois.edu, E-mail: schlom@cornell.edu [Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853 (United States); Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853 (United States)

    2014-01-01

    We used oxide molecular-beam epitaxy in a composition-spread geometry to deposit hexagonal LuFeO{sub 3} (h-LuFeO{sub 3}) thin films with a monotonic variation in the Lu/Fe cation ratio, creating a mosaic of samples that ranged from iron rich to lutetium rich. We characterized the effects of composition variation with x-ray diffraction, atomic force microscopy, scanning transmission electron microscopy, and superconducting quantum interference device magnetometry. After identifying growth conditions leading to stoichiometric film growth, an additional sample was grown with a rotating sample stage. From this stoichiometric sample, we determined stoichiometric h-LuFeO{sub 3} to have a T{sub N} = 147 K and M{sub s} = 0.018 μ{sub B}/Fe.

  18. Multimodal Somatostatin Receptor Theranostics Using [64Cu]Cu-/[177Lu]Lu-DOTA-(Tyr3)octreotate and AN-238 in a Mouse Pheochromocytoma Model

    Science.gov (United States)

    Ullrich, Martin; Bergmann, Ralf; Peitzsch, Mirko; Zenker, Erik F.; Cartellieri, Marc; Bachmann, Michael; Ehrhart-Bornstein, Monika; Block, Norman L.; Schally, Andrew V.; Eisenhofer, Graeme; Bornstein, Stefan R.; Pietzsch, Jens; Ziegler, Christian G.

    2016-01-01

    Pheochromocytomas and extra-adrenal paragangliomas (PHEO/PGLs) are rare catecholamine-producing chromaffin cell tumors. For metastatic disease, no effective therapy is available. Overexpression of somatostatin type 2 receptors (SSTR2) in PHEO/PGLs promotes interest in applying therapies using somatostatin analogs linked to radionuclides and/or cytotoxic compounds, such as [177Lu]Lu-DOTA-(Tyr3)octreotate (DOTATATE) and AN-238. Systematic evaluation of such therapies for the treatment of PHEO/PGLs requires sophisticated animal models. In this study, the mouse pheochromocytoma (MPC)-mCherry allograft model showed high tumor densities of murine SSTR2 (mSSTR2) and high tumor uptake of [64Cu]Cu-DOTATATE. Using tumor sections, we assessed mSSTR2-specific binding of DOTATATE, AN-238, and somatostatin-14. Therapeutic studies showed substantial reduction of tumor growth and tumor-related renal monoamine excretion in tumor-bearing mice after treatment with [177Lu]Lu-DOTATATE compared to AN-238 and doxorubicin. Analyses did not show agonist-dependent receptor downregulation after single mSSTR2-targeting therapies. This study demonstrates that the MPC-mCherry model is a uniquely powerful tool for the preclinical evaluation of SSTR2-targeting theranostic applications in vivo. Our findings highlight the therapeutic potential of somatostatin analogs, especially of [177Lu]Lu-DOTATATE, for the treatment of metastatic PHEO/PGLs. Repeated treatment cycles, fractionated combinations of SSTR2-targeting radionuclide and cytotoxic therapies, and other adjuvant compounds addressing additional mechanisms may further enhance therapeutic outcome. PMID:27022413

  19. The Significance of Symbolic Elements in Lu Xun’s Short Stories

    Directory of Open Access Journals (Sweden)

    Tina Ilgo

    2010-12-01

    Full Text Available The present article interprets the symbolic elements in Lu Xun’s short stories which have been neglected in earlier studies about Lu Xun. I intend to show that the most obvious symbols in his fiction, like the iron room, the cannibalism, etc., have their counter balance in the animal symbols present in his work. Following this idea, I will focus on his less famous stories, such as A Comedy of Ducks and Some Rabbits and a Cat.

  20. High-light-output scintillator for photodiode readout: LuI3:Ce3+

    NARCIS (Netherlands)

    Birowosuto, M.D.; Dorenbos, P.; Van Eijk, C.W.E.; Krämer, K.W.; Güdel, H.U.

    2006-01-01

    In this paper, we investigated the scintillation properties of LuI3:Ce3+. Radioluminescence, light output, energy resolution, and γ-scintillation decay are reported. We find an extremely high light output of 98 000±10 000 photons/MeV. LuI3:Ce3+ also gives a very high electron-hole (e-h) pair respons

  1. In Vivo Measurement and Characterization of a Novel Formulation of [177Lu]-DOTA-Octreotate

    Directory of Open Access Journals (Sweden)

    Dale Bailey

    2016-01-01

    Full Text Available Objective(s:Lutetium-177 can be made with high specific activity and with no other isotopes of lutetium present, referred to as “No Carrier Added” (NCA 177Lu. We have radiolabelled DOTA-conjugated peptide DOTA‐(Tyr3‐octreotate with NCA 177Lu (“NCA-LuTATE” and used it in nearly 40 therapeutic administrations for subjects with neuroendocrine tumours or meningiomas. In this paper, we report on our initial studies on aspects of the biodistribution and dosimetry of NCA-LuTATE from gamma camera 2D whole body (WB and quantitative 3D SPECT (qSPECT 177Lu imaging. Methods: Thirteen patients received 39 NCA-LuTATE injections. Extensive WB planar and qSPECT imaging was acquired at approximately 0.5, 4, 24 and 96 h to permit estimates of clearance and radiation dose estimation using MIRD-based methodology (OLINDA-EXM. Results:The average amount of NCA-Lutate administered per cycle was 7839±520 MBq. Bi-exponential modelling of whole body clearance showed half lives for the fast & slow components of t½=2.1±0.6 h and t½=58.1±6.6 h respectively. The average effective dose to kidneys was 3.1±1.0 Gy per cycle. In eight patients completing all treatment cycles the average total dose to kidneys was 11.7±3.6 Gy. Conclusions: We have shown that NCA-LuTATE has an acceptable radiation safety profile and is a suitable alternative to Carrier-Added 177Lu formulations. The fast component of the radiopharmaceutical clearance was closely correlated with baseline renal glomerular filtration rate, and this had an impact on radiation dose to the kidneys. In addition, it has less radioactive waste issues and requires less peptide per treatment.

  2. Informative document waste plastics

    NARCIS (Netherlands)

    Nagelhout D; Sein AA; Duvoort GL

    1989-01-01

    This "Informative document waste plastics" forms part of a series of "informative documents waste materials". These documents are conducted by RIVM on the indstruction of the Directorate General for the Environment, Waste Materials Directorate, in behalf of the program of

  3. A Plastic Menagerie

    Science.gov (United States)

    Hadley, Mary Jane

    2010-01-01

    Bobble heads had become quite popular, depicting all sorts of sports figures, animals, and even presidents. In this article, the author describes how her fourth graders made bobble head sculptures out of empty plastic drink bottles. (Contains 1 online resource.)

  4. Cortical plasticity and rehabilitation.

    Science.gov (United States)

    Moucha, Raluca; Kilgard, Michael P

    2006-01-01

    The brain is constantly adapting to environmental and endogenous changes (including injury) that occur at every stage of life. The mechanisms that regulate neural plasticity have been refined over millions of years. Motivation and sensory experience directly shape the rewiring that makes learning and neurological recovery possible. Guiding neural reorganization in a manner that facilitates recovery of function is a primary goal of neurological rehabilitation. As the rules that govern neural plasticity become better understood, it will be possible to manipulate the sensory and motor experience of patients to induce specific forms of plasticity. This review summarizes our current knowledge regarding factors that regulate cortical plasticity, illustrates specific forms of reorganization induced by control of each factor, and suggests how to exploit these factors for clinical benefit.

  5. Mechanical plasticity of cells

    Science.gov (United States)

    Bonakdar, Navid; Gerum, Richard; Kuhn, Michael; Spörrer, Marina; Lippert, Anna; Schneider, Werner; Aifantis, Katerina E.; Fabry, Ben

    2016-10-01

    Under mechanical loading, most living cells show a viscoelastic deformation that follows a power law in time. After removal of the mechanical load, the cell shape recovers only incompletely to its original undeformed configuration. Here, we show that incomplete shape recovery is due to an additive plastic deformation that displays the same power-law dynamics as the fully reversible viscoelastic deformation response. Moreover, the plastic deformation is a constant fraction of the total cell deformation and originates from bond ruptures within the cytoskeleton. A simple extension of the prevailing viscoelastic power-law response theory with a plastic element correctly predicts the cell behaviour under cyclic loading. Our findings show that plastic energy dissipation during cell deformation is tightly linked to elastic cytoskeletal stresses, which suggests the existence of an adaptive mechanism that protects the cell against mechanical damage.

  6. Targeting tumour Cell Plasticity

    Institute of Scientific and Technical Information of China (English)

    Elizabeth D. WILLIAMS

    2009-01-01

    @@ Her research is focused on understanding the mechanisms of tumour progression and metastasis, particularly in uro-logical carcinomas (bladder and prostate). Tumour cell plasticity, including epithelial-mesenchymal transition, is a cen-tral theme in Dr Williams' work.

  7. Progress in the development of LuAlO$_{3}$ based scintillators

    CERN Document Server

    Belsky, A; Lecoq, P; Dujardin, C; Garnier, N; Canibano, H; Pédrini, C; Petrosian, A

    2000-01-01

    LuAlO/sub 3/:Ce/sup 3+/ (LuAP) and Lu/sub x/Y/sub 1/-xAlO/sub 3/:Ce /sup 3+/ (LuYAP) crystals are used as scintillation materials for positron emission tomography. The actual study of these scintillators develops in three directions: (i) growth of large size LuAP crystals with stable properties, (ii) the relationship between the composition of LuYAP crystals and scintillation properties, and (iii) scintillation mechanisms in lutetium compounds. After improving of growth conditions a large size samples (length >40 mm) have been prepared. Crystals show a good correlation between growth parameters, light yield and transmission spectra. We studied a series of samples with calibrated size (2*2*10 mm3) and compare the light yield with standard BGO and LSO samples. Mixed crystals with composition of 0.6

  8. Overview of Development and Formulation of ¹⁷⁷Lu-DOTA-TATE for PRRT.

    Science.gov (United States)

    Breeman, Wouter A P; Chan, Ho Sze; de Zanger, Rory M S; Konijnenberg, Mark K; de Blois, Erik

    2016-01-01

    Peptide receptor radionuclide therapy (PRRT) using radiolabeled somatostatin analogs has become an established procedure for the treatment of patients suffering from inoperable neuroendocrine cancers over-expressing somatostatin receptors. Success of PRRT depends on the availability of the radiolabeled peptide with adequately high specific activity, so that required therapeutic efficacy can be achieved without saturating the limited number of receptors available on the target lesions. Specific activity of the radionuclide and the radiolabeled somatostatin analog are therefore an important parameters. Although these analogs have been investigated and improved, and successfully applied for PRRT for more than 15 years, there are still many possibilities for further improvements that fully exploit PRRT with 177Lu-DOTA-TATE. The here summarized data presented herein on increased knowledge of the components of 177Lu-DOTA-TATE (especially the purity of 177Lu and specific activity of 177Lu) and the reaction kinetics during labeling 177Lu-DOTA-TATE clearly show that the peptide dose and dose in GBq can be varied. Here we present an overview of the development, formulation and optimisation of 177Lu-DOTA-TATE, mainly addressing radiochemical parameters.

  9. Correlation between magnon and magnetic symmetries of hexagonal RMnO3 (R = Er, Ho, Lu)

    Science.gov (United States)

    Nguyen, Thi Minh Hien; Nguyen, Thi Huyen; Chen, Xiang-Bai; Park, Yeonju; Jung, Young Mee; Lee, D.; Noh, T. W.; Cheong, Sang-Wook; Yang, In-Sang

    2016-11-01

    The correlation between the magnon scattering and the magnetic symmetries of hexagonal RMnO3 (R = Er, Ho) thin films and LuMnO3 single crystal was studied through the 2D Correlation Spectroscopy (2D COS) and Perturbation-Correlation Moving Window 2D (PCMW2D) Correlation Spectroscopy which were performed on the temperature-dependent Raman spectra of RMnO3 (R = Er, Ho, Lu). From the Raman spectra, we observed much stronger intensity and more asymmetrical magnon peak in LuMnO3 single crystal than in ErMnO3 and HoMnO3 thin films. While the ratio between magnon and phonon's linewidth of LuMnO3 and HoMnO3 display an anomalous behavior, that ratio of ErMnO3 is almost stable. The result from PCMW2D also supports these results. In addition, our 2D COS analysis showed that there are more overlap peaks in broad four-spin flipping magnon peak in LuMnO3 than that in ErMnO3 and HoMnO3. The differences of hexagonal RMnO3 (R = Er, Ho, Lu) in magnon scattering are very similar to the actual differences of the magnetic symmetries of these compounds. Therefore, we suggest that the magnon scattering of hexagonal RMnO3 is strongly correlated with the magnetic symmetries of these materials.

  10. Laser cutting plastic materials

    Energy Technology Data Exchange (ETDEWEB)

    Van Cleave, R.A.

    1980-08-01

    A 1000-watt CO/sub 2/ laser has been demonstrated as a reliable production machine tool for cutting of plastics, high strength reinforced composites, and other nonmetals. More than 40 different plastics have been laser cut, and the results are tabulated. Applications for laser cutting described include fiberglass-reinforced laminates, Kevlar/epoxy composites, fiberglass-reinforced phenolics, nylon/epoxy laminates, ceramics, and disposable tooling made from acrylic.

  11. Localization of plastic deformation

    Energy Technology Data Exchange (ETDEWEB)

    Rice, J R

    1976-04-01

    The localization of plastic deformation into a shear band is discussed as an instability of plastic flow and a precursor to rupture. Experimental observations are reviewed, a general theoretical framework is presented, and specific calculations of critical conditions are carried out for a variety of material models. The interplay between features of inelastic constitutive description, especially deviations from normality and vertex-like yielding, and the onset of localization is emphasized.

  12. Development of plastic surgery

    Directory of Open Access Journals (Sweden)

    Pećanac Marija Đ.

    2015-01-01

    Full Text Available Introduction. Plastic surgery is a medical specialty dealing with corrections of defects, improvements in appearance and restoration of lost function. Ancient Times. The first recorded account of reconstructive plastic surgery was found in ancient Indian Sanskrit texts, which described reconstructive surgeries of the nose and ears. In ancient Greece and Rome, many medicine men performed simple plastic cosmetic surgeries to repair damaged parts of the body caused by war mutilation, punishment or humiliation. In the Middle Ages, the development of all medical braches, including plastic surgery was hindered. New age. The interest in surgical reconstruction of mutilated body parts was renewed in the XVIII century by a great number of enthusiastic and charismatic surgeons, who mastered surgical disciplines and became true artists that created new forms. Modern Era. In the XX century, plastic surgery developed as a modern branch in medicine including many types of reconstructive surgery, hand, head and neck surgery, microsurgery and replantation, treatment of burns and their sequelae, and esthetic surgery. Contemporary and future plastic surgery will continue to evolve and improve with regenerative medicine and tissue engineering resulting in a lot of benefits to be gained by patients in reconstruction after body trauma, oncology amputation, and for congenital disfigurement and dysfunction.

  13. Sorting Plastic Waste in Hydrocyclone

    Directory of Open Access Journals (Sweden)

    Ernestas Šutinys

    2011-02-01

    Full Text Available The article presents material about sorting plastic waste in hydrocyclone. The tests on sorting plastic waste were carried out. Also, the findings received from the performed experiment on the technology of sorting plastic waste are interpreted applying an experimental model of the equipment used for sorting plastics of different density.Article in Lithuanian

  14. Lu-Hf and Sm-Nd garnet geochronology

    DEFF Research Database (Denmark)

    Smit, Matthijs Arjen; Scherer, Erik E.; Mezger, Klaus

    2013-01-01

    are similar among grains having radii larger than 1.3 mm (weighted mean: 2714±6 Ma2714±6 Ma; 2 s.d.) and up to 20 Myr younger for finer fractions. In contrast, Sm–Nd dates are equal to or younger than the 2641–2637 Ma age of peak metamorphism. The roles of concurrently digested inclusions and core–rim Lu......To investigate the systematics of the 176Lu–176Hf and 147Sm–143Nd garnet chronometers, we performed REE and isotope analyses on garnet crystals of different size (0.55–3.1 mm radius) from a single granulite specimen (Archean Pikwitonei Granulite Domain, Manitoba, Canada). The Lu–Hf dates....../Sm fractionation are quantitatively evaluated and excluded as causes for the observed age heterogeneity. Instead, the isotope dates are interpreted to reflect partial loss of radiogenic 176Hf and 143Nd, and are used to constrain the systematics of the garnet chronometers at high temperature. The data constrain...

  15. A Stalwart Fighter for New China All Her Life——In Memory of Comrade Lu Cui

    Institute of Scientific and Technical Information of China (English)

    Shu; Zhang

    2015-01-01

    The Spring Festival had just ended when I received a phone call from Lu Lanqin to tell me that her mother had passed away.I was saddened by this sudden news,even though she had lived a remarkable 101 years.And she will always live in our hearts.The mother of Lu Lanqin was our beloved Comrade Lu Cui,an outstanding woman who worked hard for New

  16. Problematika zvyšování podílu R - materiálu v asfaltových směsích

    OpenAIRE

    Urbanec, Luboš

    2013-01-01

    Předmětem této diplomové práce je problematika asfaltových směsí se zvyšujícím se podílem R-materiálu. V teoretické části práce jsou definovány pojmy recyklace a R-materiál a popsány druhy recyklace. Praktická část se věnuje výrobě a zkoušení asfaltových směsí s různým obsahem R-materiálu. Navrhovaná asfaltová směs je asfaltový beton pro podkladní vrstvy ACP22+. Obsah R-materiálu ve směsích je 0%, 30%, 50% a 70%. Jako speciální přísada pro změkčení asfaltu z R-materiálu se používá přísada STO...

  17. A potencial theranostic agent for EGF-R expression tumors: (177)Lu-DOTA-nimotuzumab.

    Science.gov (United States)

    Calzada, Victoria; Zhang, Xiuli; Fernandez, Marcelo; Diaz-Miqueli, Arlhee; Iznaga-Escobar, Normando; Deutscher, Susan L; Balter, Henia; Quinn, Thomas P; Cabral, Pablo

    2012-10-01

    In this work Nimotuzumab (monoclonal antibody, recognizes the EGF-R) was radiolabeled with (177)Lu as a potential cancer therapy radiopharmaceutical. In-vitro cell binding studies and in-vivo biodistribution and imaging studies were performed to determine the radiochemical stability, targeting specificity and pharmacokinetics of the (177)Lu-labeled antibody. Nimotuzumab was derivatized with DOTA-NHS at room temperature for 2 hours. DOTA-Nimotuzumab was radiolabeled with (177)LuCl3 (15 MBq/mg) at 37°C for 1 h. The radiochemical purity was assessed by ITLC, silica gel and by RP-HPLC. Binding specificity studies were performed with EGF-R positive A431 human epithelial carcinoma and EGF-R negative MDA-MB-435 breast carcinoma cells. Biodistribution studies were performed in healthy female CD-1 mice at 1 h, 4 h, 24 h, and A431 xenografted nude mice at 10 min, 1 h, 4 h, 24 h, 48 h, and 96 h. SPECT-CT imaging studies were performed in A431 xenografted mice at 24 h post injection. DOTA-Nimotuzumab was efficiently labeled with (177) LuCl(3) at 37°C. The in vitro stability of labeled product was optimal over 24 h in buffered saline and mouse serum. Specific recognition of EGF-R by (177)Lu-DOTA-Nimotuzumab was observed in A431 cell binding studies. Biodistribution studies demonstrated increasing tumor uptake of (177)Lu-DOTA-Nimotuzumab over time, with tumor to muscle ratios of 6.26, 10.68, and 18.82 at 4 h, 24 h, and 96 h post injection. Imaging of A431 xenografted mice showed high uptake in the tumor. (177)Lu-DOTA-Nimotuzumab has the potential to be a promising therapy agent, which may be useful in the treatment of patients with EGF-R positive cancer.

  18. Potential therapeutic radiotracers: preparation, biodistribution and metabolic characteristics of 177Lu-labeled cyclic RGDfK dimer.

    Science.gov (United States)

    Shi, Jiyun; Liu, Zhaofei; Jia, Bing; Yu, Zilin; Zhao, Huiyun; Wang, Fan

    2010-06-01

    In this study, we reported the preparation and evaluation of (177)Lu-DOTA-RGD2, (177)Lu-DOTA-Bz-RGD2 and (177)Lu-DTPA-Bz-RGD2 (RGD2 = E[c(RGDfK)](2)) as a potential therapeutic radiotracers for the treatment of integrin alpha(v)beta(3)-positive tumors. The BALB/c nude mice bearing the U87MG human glioma xenografts were used to evaluate the biodistribution characteristics and excretion kinetics of (177)Lu-DOTA-RGD2, (177)Lu-DOTA-Bz-RGD2 and (177)Lu-DTPA-Bz-RGD2. It was found that there were no major differences in their lipophilicity and biodistribution characteristics, particularly at latter time points. A major advantage of using DTPA-Bz as the bifunctional chelator (BFC) was its high radiolabeling efficiency (fast and high yield radiolabeling) at room temperature. Using DOTA and DOTA-Bz as BFCs, the radiolabeling kinetics was slow, and heating at 100 degrees C and higher DOTA-conjugate concentration were needed for successful (177)Lu-labeling. Therefore, DTPA-Bz is an optimal BFC for routine preparation of (177)Lu-labeled cyclic RGDfK peptides, and (177)Lu-DTPA-Bz-RGD2 is worthy of further investigation for targeted radiotherapy of integrin alpha(v)beta(3)-positive tumors.

  19. Scintillating screens for micro-imaging based on the Ce-Tb doped LuAP single crystal films

    OpenAIRE

    Douissard, Paul-Antoine; MARTIN, Thierry; Riva, Federica; Mathieu, Eric; Zorenko, Yuriy; Savchyn, Volodymyr; Zorenko, Tetyana; Fedorov, Alexander

    2014-01-01

    Single Crystal Film (SCF) scintillators are key-components of today's high-resolution 2D X-ray detectors used at synchrotrons for applications such as X-ray Radiography, Computed Tomography (CT), laminography, full-field XANES, and topography. Due to its high density and effective atomic number, LuAlO3 (LuAP) perovskite has a great potential to replace or complement the currently used Eu-doped Gd3Ga5O12 (GGG:Eu) and Tb-doped Lu2SiO5 (LSO:Tb) SCFs. In this article we present the growth of LuAP...

  20. Preparation of LuAG Powders with Single Phase and Good Dispersion for Transparent Ceramics Using Co-Precipitation Method

    Directory of Open Access Journals (Sweden)

    Liangjie Pan

    2015-08-01

    Full Text Available The synthesis of pure and well dispersed lutetium aluminum garnet (LuAG powder is crucial and important for the preparation of LuAG transparent ceramics. In this paper, high purity and well dispersed LuAG powders have been synthesized via co-precipitation method with lutetium nitrate and aluminum nitrate as raw materials. Ammonium hydrogen carbonate (AHC was used as the precipitant. The influence of aging time, pH value, and dripping speed on the prepared LuAG powders were investigated. It showed that long aging duration (>15 h with high terminal pH value (>7.80 resulted in segregation of rhombus Lu precipitate and Al precipitate. By decreasing the initial pH value or accelerating the dripping speed, rhombus Lu precipitate was eliminated and pure LuAG nano powders were synthesized. High quality LuAG transparent ceramics with transmission >75% at 1064 nm were fabricated using these well dispersed nano LuAG powders.

  1. Effective lattice stabilization of gadolinium aluminate garnet (GdAG via Lu3+ doping and development of highly efficient (Gd,LuAG:Eu3+ red phosphors

    Directory of Open Access Journals (Sweden)

    Jinkai Li, Ji-Guang Li, Zhongjie Zhang, Xiaoli Wu, Shaohong Liu, Xiaodong Li, Xudong Sun and Yoshio Sakka

    2012-01-01

    Full Text Available The metastable garnet lattice of Gd3Al5O12 is stabilized by doping with smaller Lu3+, which then allows an effective incorporation of larger Eu3+ activators. The [(Gd1−xLux1−yEuy]3Al5O12 (x = 0.1–0.5, y = 0.01–0.09 garnet solid solutions, calcined from their precursors synthesized via carbonate coprecipitation, exhibit strong luminescence at 591 nm (the 5D0 → 7F1 magnetic dipole transition of Eu3+ upon UV excitation into the charge transfer band (CTB at ~239 nm, with CIE chromaticity coordinates of x = 0.620 and y = 0.380 (orange-red. The quenching concentration of Eu3+ was estimated at ~5 at.% (y = 0.05, and the quenching was attributed to exchange interactions. Partial replacement of Gd3+ with Lu3+ up to 50 at.% (x = 0.5 while keeping Eu3+ at the optimal content of 5 at.% does not significantly alter the peak positions of the CTB and 5D0 → 7F1 emission bands but slightly weakens both bands owing to the higher electronegativity of Lu3+. The effects of processing temperature (1000–1500 °C and Lu/Eu contents on the intensity, quantum efficiency, lifetime and asymmetry factor of luminescence were thoroughly investigated. The [(Gd0.7Lu0.30.95Eu0.05]3Al5O12 phosphor processed at 1500 °C exhibits a high internal quantum efficiency of ~83.2% under 239 nm excitation, which, in combination with the high theoretical density, favors its use as a new type of photoluminescent and scintillation material.

  2. Langston University - High Energy Physics (LU-HEP)

    Energy Technology Data Exchange (ETDEWEB)

    Snow, Dr., Joel [Langston Univ., OK (United States)

    2012-08-13

    This final report is presented by Langston University (LU) for the project entitled "Langston University High Energy Physics" (LUHEP) under the direction of principal investigator (PI) and project director Professor Joel Snow. The project encompassed high energy physics research performed at hadron colliders. The PI is a collaborator on the DZero experiment at Fermi National Accelerator Laboratory in Batavia, IL, USA and the ATLAS experiment at CERN in Geneva, Switzerland and was during the entire project period from April 1, 1999 until May 14, 2012. Both experiments seek to understand the fundamental constituents of the physical universe and the forces that govern their interactions. In 1999 as member of the Online Systems group for Run 2 the PI developed a cross-platform Python-based, Graphical User Interface (GUI) application for monitoring and control of EPICS based devices for control room use. This served as a model for other developers to enhance and build on for further monitoring and control tasks written in Python. Subsequently the PI created and developed a cross-platform C++ GUI utilizing a networked client-server paradigm and based on ROOT, the object oriented analysis framework from CERN. The GUI served as a user interface to the Examine tasks running in the D\\O\\ control room which monitored the status and integrity of data taking for Run 2. The PI developed the histogram server/control interface to the GUI client for the EXAMINE processes. The histogram server was built from the ROOT framework and was integrated into the D\\O\\ framework used for online monitoring programs and offline analysis. The PI developed the first implementation of displaying histograms dynamically generated by ROOT in a Web Browser. The PI's work resulted in several talks and papers at international conferences and workshops. The PI established computing software infrastructure at LU and U. Oklahoma (OU) to do analysis of DZero production data and produce simulation

  3. Emergence and present status of Lu-177 in targeted radiotherapy. The Indian scenario

    Energy Technology Data Exchange (ETDEWEB)

    Banerjee, S.; Das, T.; Chakraborty, S.; Venkatesh, M. [Bhabha Atomic Reseach Centre, Trombay, Mumbai (India). Radiopharmaceuticals Div.

    2012-07-01

    {sup 177}Lu is presently considered to be a potential radionuclide for the development of agents for radionuclide therapy owing to its favorable nuclear decay characteristics [T{sub 1/2} = 6.65 d, E{sub {beta}}{sub (max)} = 0.497 MeV, E{sub {gamma}} = 113 KeV (6.4%) and 208 KeV (11%)]. While the long half-life of this promising radioisotope offers distinct logistic advantage, particularly, in countries having limited reactor facilities, the feasibility of its large-scale production with adequate specific activity and excellent radionuclidic purity in medium flux research reactors constitute yet another desirable feature. Extensive studies have been carried out to optimize the production of this isotope, with high specific activity and radionuclidic purity by the (n,{gamma}) route using the highest available flux and the optimum irradiation time. The gradual evolution of clin ical grade {sup 177}LuCl{sub 3} as a new radiochemical, ready for commercial deployment by Radiopharmaceuticals Division, Bhabha Atomic Research Centre, to nuclear medicine centers all over India was accomplished in 2010 in a stepwise manner with the commencement of the production of high specific activity {sup 177}Lu from enriched target in 2001. Research on {sup 177}Lu has demonstrated its immense potential in radiotherapeutic applications, a direct outcome of which has resulted in indigenous development of two agents viz. {sup 177}Lu-EDTMP and {sup 177}Lu-DOTA-TATE presently being evaluated in human patients for palliative care of bone pain due to skeletal metastases and treatment of malignancies of neuroendocrine origin, respectively. Using locally produced {sup 177}Lu, the radiolabeling of a plethora of other molecules with potential applicability in radiation synovectomy and targeted therapy of malignant tumors have been successfully demonstrated. A few of these agent such as a novel {sup 177}Lu-labeled porphyrin has shown considerable promise in initial studies and is presently evaluated

  4. Synthesis of Er-doped Lu2O3 nanoparticles and transparent ceramics

    Science.gov (United States)

    Serivalsatit, K.; Wasanapiarnpong, T.; Kucera, C.; Ballato, J.

    2013-05-01

    Transparent rare earth-doped Lu2O3 ceramics have received much attention for use in solid-state scintillator and laser applications. The fabrication of these ceramics, however, requires ultrafine and uniform powders as precursors. Presented here is the synthesis of Er-doped Lu2O3 nanopowders by a solution precipitation method using Er-doped lutetium sulfate solution and hexamethylenetetramine as a precipitant and the fabrication of Er-doped Lu2O3 transparent ceramics from these nanopowders. The precipitated precursors were calcined at 1100 °C for 4 h in order to convert the precursors into Lu2O3 nanoparticles with an average particle size of 60 nm. Thermal decomposition and phase evolution of the precursors were studied by simultaneous thermal analysis (STA), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). Er-doped Lu2O3 transparent ceramics were fabricated from these nanopowders using vacuum sintering followed by hot isostatic pressing at 1700 °C for 8 h. The transparent ceramics exhibit an optical transmittance of 78% at a wavelength of 1.55 μm.

  5. Progress in the development of LuAlO3 based scintillators

    CERN Document Server

    Belsky, A; Lecoq, P; Dujardin, C; Garnier, N; Canibano, H; Pédrini, C; Petrosian, A

    2000-01-01

    LuAlO3:Ce3+ (LuAP) and LuxY1-xAlO3:Ce3+ (LuYAP) crystals are the promote scintillation materials for Positron Emission Tomography. Actual study of these scintillators develops in the tree directions: (i) growth of large size LuAP crystals with stable properties, (ii) relationship between composition of LuYAP crystals and scintillation properties, and (iii) scintillation mechanisms in lutetium compounds. After improving of growth conditions a large size samples (length greater than 40 mm) have been prepared. Crystals show a good correlation between growth parameters, light yield and transmission spectra. We performed a series of samples with calibrated size (2x2x10 mm3) and compare the light yield with a standard BGO and LSO samples. Mixed crystals with composition of 0.6 less than x less than 0.8 show a significant increase of light yield. We suggest that the short order clusterisation in mixed crystals may by playing an important role in governing the scintillation efficiency. In order to clarify the scintil...

  6. Pressure induced phase transition and thermo-physical properties in LuX (X = N, P)

    Science.gov (United States)

    Sahoo, B. D.; Mukherjee, D.; Joshi, K. D.; Kaushik, T. C.; Gupta, Satish C.

    2016-04-01

    Detailed total energy calculations have been performed in lutetium pnictides (LuX, where X = N, P) to understand their high pressure structural stability. In LuN, the ambient rocksalt type structure (B1 phase) transforms to a tetragonal structure (B10 phase) at ˜240 GPa; whereas in LuP the orthorhombic structure (B33, space group Cmcm) emerges as a high pressure structure above 48 GPa. Both the transitions are found to be of first-order type with volume discontinuities of ˜6% and 8.2%, respectively. The high pressure phases B10 and B33 are found to be stable up to 400 GPa, respectively. Further, the structural stability predicted from static lattice calculations has been supported by lattice dynamical stability analysis. The present calculations rule out the B1 to B2 (CsCl type) structural phase transitions predicted to occur at 241 GPa in LuN and at 98 GPa in LuP by previous all-electron calculations (Gupta and Bhat 2013 J. Mol. Model 19 5343-54). The temperature dependence of several thermo-physical properties such as volume, bulk modulus, specific heat and thermal expansion coefficient of the rocksalt structure of these compounds calculated in the present study, using quasi-harmonic approximation, awaits confirmation by experimental studies.

  7. Investigation of luminescence from LuAG: Mn4+ for physiological temperature sensing

    Science.gov (United States)

    Li, Fei; Cai, Jiajia; Chi, FengFeng; Chen, Yonghu; Duan, Changkui; Yin, Min

    2017-04-01

    Optical thermometry based on luminescent materials has garnered much attention due to its many advantages. But higher sensitivity is still expected in physiological temperature range which is of special significance in medicine and biology. For this purpose, quadrivalent manganese doped lutetium aluminum garnet, Lu3Al5O12: Mn4+, or simply LuAG: Mn4+, has been successfully synthesized by sol-gel method and its temperature dependent luminescence has been investigated in the present work. Compared to the common red emission phosphors Y3Al5O12: Mn4+ (YAG:Mn4+) with same structure, LuAG:Mn4+ has a stronger crystal field strength and a higher thermal-quenching activation energy (ΔE) of 5732 cm-1. Rapid thermal quenching of the Mn4+ luminescence occurred above room temperature around 90 °C for our LuAG:Mn4+ sample. Temperature dependent decay curves of Mn4+ emission from LuAG:Mn4+ revealed that an extraordinary high sensitivity can be achieved from luminescence lifetime measurements covering physiological temperature range with a sensitivity of 3.75% K-1 at 38 °C.

  8. Synthesis and luminescent properties of Pr-doped Lu3Al5O12 translucent ceramic

    Institute of Scientific and Technical Information of China (English)

    ZHAO Jiangbo; WANG Zhifang; WANG Chaonan; WEI Xiantao; LI Yong; ZHANG Weiping; YIN Min

    2009-01-01

    Lutetium aluminum garnet (LuAG) precursors doped with different Pr3+ concentration (0.25at.%, 0.5at.%, 1.0at.%, 3.0at.%, 5.0at.%) were synthesized via a co-precipitation method using ammonium hydrogen carbonate as precipitant. The phase evolution and mor-phology of the precursor were characterized with X-ray diffractometer (XRD) and transmission electron microscopy (TEM). The resultant LuAG:Pr3+ powder was sintered into translucent ceramic without any additives in vacuum at 1150℃ and then in nitrogen atmosphere at 1700℃. Photohiminescence spectra of LuAG:Pr3+ powder and ceramic were measured at room temperature in vacuum ultraviolet (VUV) and ultraviolet (VU) region. For the 5d-4f transition of Pr3+ ions, dominant emission of ceramic samples peaking round 311 nm had higher lumines-cence intensity. And the host absorption in ceramic samples was not as intensive as that in powder samples. The luminescent intensity of LuAG:Pr3+ varied with the Pr3+ contents and the quenching concentration was about 1.0at.% for ceramic and 3.0at.% for powder, which was much higher than 0.24at.% for LuAG:Pr3+ single crystals. This phenomenon showed that the ceramic had some superiority over single crystals.

  9. {sup 177}Lu-DOTA-lanreotide: a novel tracer as a targeted agent for tumor therapy

    Energy Technology Data Exchange (ETDEWEB)

    Banerjee, Sharmila; Das, Tapas; Chakraborty, Sudipta; Samuel, Grace; Korde, Aruna; Srivastava, Sudha; Venkatesh, Meera E-mail: meerav@apsara.barc.ernet.in; Pillai, M.R.A

    2004-08-01

    {sup 177}Lu of specific activity {approx}100-110 TBq/g and radionuclidic purity of {approx}100% was obtained by irradiation of enriched Lu{sub 2}O{sub 3} (60.6% {sup 176}Lu) target for 7 days at a thermal neutron flux of 3x10{sup 13}n/cm{sup 2}/sec. The {sup 177}Lu labeling of a macrocyclic bifunctional chelating agent viz. 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA) has been extensively studied. Lanreotide, [{beta}-naphthyl-Ala-Cys-Tyr-D-Trp-Lys-Val-Cys-Thr-NH{sub 2}] a disulfide-linked cyclic octapeptide and a somatostatin analog, reported to bind with a wide variety of tumors expressing somatostatin receptors, was conjugated with DOTA. The peptide-BFCA conjugate was characterized with the help of high-resolution two-dimensional proton NMR spectroscopy. The {sup 177}Lu labeling of the DOTA-lanreotide conjugate has been standardized to give a radiolabeling yield of 85%. The tracer showed specific binding with A-431 human epidermoid carcinoma and IMR-32 human brain neuroblastoma cells.

  10. Absence of justice : Lu Chengming's struggle for compensation

    Energy Technology Data Exchange (ETDEWEB)

    Bai, L.

    2008-03-10

    This article described the efforts of Chinese citizen Lu Chengming to claim compensation from the Chinese government after being forcibly re-located during the building of the Three Gorges hydroelectric project. Research conducted by the author revealed that many households were not compensated for being resettled, and that many people who had lived in the region became refugees. Lu Chengming's family became unemployed after his hotel was demolished in 2002. The family of 11 was then divided into 4 in order to further reduce the amount of subsidies owed to them. Appeals to higher authorities began in 1993. Since then, Lu Chengming has only received the most basic welfare assistance. This article provided a translation of Lu Chengming's testimony as well as his account of the resettlement procedures. It was concluded that while the Chinese government consistently refuses his claims, Lu Chengming continues to live in hope that the government will award him his settlement. 4 refs., 3 figs.

  11. Complex cytokine modulation of a continuous line of mink lung epithelial cells (Mv1Lu).

    Science.gov (United States)

    Kelley, J; Baldor, L; Absher, M

    1992-01-01

    The continuous mink lung epithelial cell line Mv1Lu has proven to be a sensitive reporter line in the bioassay for purified TGF-beta, exhibiting a sigmoid-shaped concentration-response relationship with an EC50 of 12 pM (0.3 ng/mL). Maximal inhibition of Mv1Lu cells generates a 75-95% decrement in the number of adherent cells. However, this bioassay is not specific for TGF-beta as originally claimed. Mv1Lu cells are sensitive to other cytokines and substances found in complex biological fluids. In this study the effects of other biological response modifiers in this assay were tested and several were found to have important growth modulatory capacities that confound the quantitation of TGF-beta. EGF, TGF-alpha, fibronectin, and IGF-I all induce Mv1Lu cell proliferation. In contrast, neither PDGF (-AA, -AB, -BB) nor endotoxin ( or = 10 ng/mL) are the only cytokines examined that inhibit Mv1Lu proliferation. TGF-beta decreases final cell number both by preventing mitosis and by inhibition of adherence of cells to the uncoated dish. Several strategies are suggested to assure the specificity of this otherwise convenient bioassay for TGF-beta.

  12. Production of {sup 177}Lu, a potential radionuclide for diagnostic and therapeutic applications

    Energy Technology Data Exchange (ETDEWEB)

    Khandaker, Mayeen Uddin; Kassim, Hasan Abu [Department of Physics, University of Malaya, 50603 Kuala Lumpur (Malaysia); Haba, Hiromitsu [Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198 (Japan)

    2015-04-24

    {sup 177g}Lu (T{sub 1/2}=6.647d; E{sub β{sup −max}}=498.3KeV, I{sub β{sup −total}}=100%; E{sub γ} = 112.9498 keV, I{sub γ} = 6.17%; E{sub γ} = 208.3662 keV, I {sub γ} = 10.36%) is widely used in many clinical procedures due to its excellent decay characteristics. Production cross-sections of the {sup nat}Yb(d,x){sup 177g}Lu reactions have been measured from a 24-MeV deuteron energy down to the threshold by using a stacked-foil activation technique combined with high resolution γ-ray spectrometry. An overall good agreement is found with some of the earlier measurements, whereas a partial agreement is obtained with the theoretical data extracted from the TENDL-2013 library. Physical thick target yield for the {sup 177g}Lu radionuclide was deduced using the measured cross-sections. The deduced yield curves indicate that a low energy (<11 MeV) cyclotron and a highly enriched {sup 176}Yb target could be used to obtain {sup 177g}Lu with negligible impurity from {sup 177m}Lu.

  13. SABIC Innovative Plastics: Be the World Best Plastic Resin Manufacturer

    Institute of Scientific and Technical Information of China (English)

    Jenny Du

    2007-01-01

    @@ "SABIC Innovative Plastics is a global supplier of plastic resins, manufacturing and compounding polycarbonate, ABS, SAN, ASA, PPE, PC/ABS, PBT and PEI resins, as well as the LNP* line of high performance specialty compounds," said Hiroshi Yoshida, the Global Market Director for Electronics of SABIC Innovative Plastics based in Tokyo at the press conference held by SABIC Innovative Plastics, November 8th 2007, Shanghai.

  14. Preserving in Plastic.

    Science.gov (United States)

    Wahla, James

    1985-01-01

    Outlines steps for casting insects in permanent molds prepared from commercially available liquid plastic. Also describes dry mountings in glass, acrylic, and petri dishes. The rationale for specimen use, hints for producing quality results, purchasing information, and safety precautions are considered. (DH)

  15. Informative document waste plastics

    NARCIS (Netherlands)

    Nagelhout D; Sein AA; Duvoort GL

    1989-01-01

    This "Informative document waste plastics" forms part of a series of "informative documents waste materials". These documents are conducted by RIVM on the indstruction of the Directorate General for the Environment, Waste Materials Directorate, in behalf of the program of acti

  16. Discrete dislocation plasticity

    NARCIS (Netherlands)

    van der Giessen, E.; Finel, A; Maziere, D; Veron, M

    2003-01-01

    Conventional continuum mechanics models of inelastic deformation processes axe size scale independent. In contrast, there is considerable experimental evidence that plastic flow in crystalline materials is size dependent over length scales of the order of tens of microns and smaller. At present ther

  17. Progress in neural plasticity

    Institute of Scientific and Technical Information of China (English)

    POO; Mu-Ming

    2010-01-01

    One of the properties of the nervous system is the use-dependent plasticity of neural circuits.The structure and function of neural circuits are susceptible to changes induced by prior neuronal activity,as reflected by short-and long-term modifications of synaptic efficacy and neuronal excitability.Regarded as the most attractive cellular mechanism underlying higher cognitive functions such as learning and memory,activity-dependent synaptic plasticity has been in the spotlight of modern neuroscience since 1973 when activity-induced long-term potentiation(LTP) of hippocampal synapses was first discovered.Over the last 10 years,Chinese neuroscientists have made notable contributions to the study of the cellular and molecular mechanisms of synaptic plasticity,as well as of the plasticity beyond synapses,including activity-dependent changes in intrinsic neuronal excitability,dendritic integration functions,neuron-glia signaling,and neural network activity.This work highlight some of these significant findings.

  18. New plastic recycling technology

    Science.gov (United States)

    Greater than 60% of the total plastic content of municipal solid waste is comprised of polyolefins (high-density, low-density, and linear polyethylene and polypropylene. Polyethylene (PE) is the largest-volume component but presents a challenge due to the absence of low-energy de...

  19. Persisting Plastic Addiction

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    The policy on curbing plastic shopping bag use implemented three years ago has produced mixed results In a bustling farmers’market tucked in a narrow street in Xisanqi residential community in north Beijing,stalls selling vegetables,fruits and other foods line the sidewalk.

  20. ETM+影像提取伏沙地信息的最佳波段组合——以内蒙古锡林郭勒盟西乌旗为例%Selection of ETM+ Remote Sensing Image Optimum Waveband Combination in Information Extraction of Sinking Sandy Land The Case in Xiwu Flag, Xilin Gol League, Inner Mongolia

    Institute of Scientific and Technical Information of China (English)

    张韬; 赵宇飞; 安慧君; 陈秀兰

    2011-01-01

    以伏沙地信息提取为研究目的,依次应用单波段信息量、相关系数矩阵、最佳指数法(OIF)、典型地物影像光谱特征曲线分析的方法,对内蒙古锡林郭勒盟西乌旗ETM+遥感影像数据的最佳波段选择进行研究.结果表明,第4波段信息量大,与其他波段间相关性小,作为必选波段;5、3波段次之;3、4、5波段组合的OIF较高.最后根据目视辨别认定波段(红)4、(绿)5、(蓝)3组合是针对伏沙地信息的最佳波段组合.%This paper discusses the optimum waveband combination in information extraction of sinking sandy land. The single band dataset, the correlation coefficient, the Optimum Index Factor (OIF) and the typical object spectral image feature curve are used to analyze the ETM+ multi-spectral band combination for sinking sandy information extraction in Xiwu Flag, Xilin Gol League, Inner Mongolia. The results show that: (1) Band 4 contains the greatest amount of information with the smallest correlation with other bands,band 5 and band 3 follow in their importance. The higher OIF can be obtained with the band 3, band 4, and band 5 combination, which is the best combination for sinking sandy land information extraction. (2) To select the best band combination according to remote sensing research target, different research objects have different best band combinations. To calculate the optimum band combination for relevant index for sinking sandy, one can use ERDAS and EXCEL tools to establish the function model, so as to improve the calculation effieiency. (3) In a typical ground, the feature image characteristic curve, sinking sandy land and typical steppe spectrum may be similar,as their difference is in the underground soil horizon part, while the ground vegetation in the remote sensing image through the spectra is difficult to be distinguished. The texture characteristics through images, the position relations ere are indirectly conditional to discriminate accurately. (4

  1. Thermal expansion properties of Lu2-x FexMo3O12

    Institute of Scientific and Technical Information of China (English)

    Wu Mei-Mei; Peng Jie; Zu Yong; Liu Rong-Deng; Hu Zhong-Bo; Liu Yun-Tao; Chen Dong-Feng

    2012-01-01

    The structures and thermal expansion properties of Lu2-xFex Mo3O12 have been investigated by X-ray diffraction (XRD).XRD patterns at room temperature indicate that componnds Lu2 xFexMo3O12 with x ≤ 1.3 exhibit an orthorhombic structure with space group Pnca;compounds with x =1.5 and 1.7 have a monoclinic structure with space group P21/a.Studies on thermal expansion properties show that the linear thermal expansion coefficients of orthorhombic phase vary from negative to positive with increasing Fe content.Attempts to make zero thermal expansion materials indicate that zero thermal expansion can be observed in Lu1.3Feo.7Mo3O12 in the temperature range of 200-400°C.

  2. Composite phosphor films based on spherical Lu2O3:Eu3+ nanoparticles

    Science.gov (United States)

    Babaevskaya, N. V.; Kryzhanovskaya, A. S.; Matveevskaya, N. A.; Mateichenko, P. V.; Yavetskii, R. P.; Tolmachev, A. V.; Tret'yak, S. E.

    2011-02-01

    A nanopowder of Lu2O3:Eu3+ ( C Eu = 5 at.%) was obtained by coprecipitation with urea (NH2)2CO from aqueous solutions. Using this nanopowder, compact Lu2O3:Eu3+ films with thicknesses within 20-200 μm and a relative density up to 65% of the theoretical limit were deposited using the spin-coating and painting techniques. The films were characterized by scanning electron microscopy, X-ray diffraction, and X-ray luminescence (XRL) measurements. It is established that the XRL intensity depends on the phosphor/organic binder ratio and thickness of the film. The most intense XRL and most homogeneous structure are observed for 20-μm-thick Lu2O3:Eu3+ films.

  3. Magnetic and magnetotransport properties of the orthorhombic perovskites (Lu,Ca)MnO3

    Science.gov (United States)

    Imamura, N.; Karppinen, M.; Motohashi, T.; Yamauchi, H.

    2008-01-01

    Here we extend the research of the (R,Ca)MnO3 perovskites to the smallest- R end member (Lu,Ca)MnO3 . Magnetic and magnetotransport properties of the (Lu1-xCax)MnO3 system are systematically investigated in regard to carrier doping. It is found that hole doping into the antiferromagnetic x=0.0 phase, LuMnO3 , causes a spin-glass-like magnetic competition in the wide doping range of 0.1≤x≤0.6 , whereas electron doping into the antiferromagnetic x=1.0 phase, CaMnO3 , induces a large magnetoresistance effect for 0.8≤x≤0.95 .

  4. Large magneto (thermo) dielectric effect in multiferroic orthorhombic LuMnO3

    Science.gov (United States)

    Wang, L. J.; Chai, Y. S.; Feng, S. M.; Zhu, J. L.; Manivannan, N.; Jin, C. Q.; Gong, Z. Z.; Wang, X. H.; Li, L. T.

    2012-06-01

    We have investigated the relation between ferroelectric and magnetic orders of orthorhombic (o-) LuMnO3 ceramics. The increase of dielectric constant ɛ exceeds 82% near incommensurate to commensurate E-type antiferromagnetic (AFM) spin ordering transition temperature TL, reflecting a large magneto (thermo) dielectric response. Meanwhile, distinct anomalies and thermal hysteresis behavior are observed near this temperature in both temperature dependence of ɛ and specific heat Cp, indicating a strong coupling between FE and magnetic orders in o-LuMnO3. Comparing to o-HoMnO3, TmMnO3, and YbMnO3 with similar E-type AFM ground state, o-LuMnO3 has the largest magneto (thermo) dielectric effect

  5. Toxicity of trastuzumab labeled {sup 177}Lu on MCF7 and SKBr3 cell lines

    Energy Technology Data Exchange (ETDEWEB)

    Rasaneh, Samira [Department of Medical Physics, Faculty of Medical Sciences, Tarbiat Modares University, P.O. Box 14115-331, Tehran (Iran, Islamic Republic of); Rajabi, Hossein, E-mail: hrajabi@modares.ac.i [Department of Medical Physics, Faculty of Medical Sciences, Tarbiat Modares University, P.O. Box 14115-331, Tehran (Iran, Islamic Republic of); Hossein Babaei, Mohammad; Johari Daha, Fariba [Department of Radioisotope, Nuclear Science and Technology Research Institute, Tehran (Iran, Islamic Republic of)

    2010-10-15

    In this study, we labeled trastuzumab with {sup 177}Lu to synthesize a new radiopharmaceutical for therapy of breast cancer and at the first stage investigated its therapeutic effects on SKBr3 and MCF7 breast cancer cell lines. Trastuzumab-{sup 177}Lu showed very good in-vitro characteristics such as high radiochemical purity (91{+-}0.9%), good stability in PBS buffer (86{+-}2.3%) and blood serum (81{+-}2.7%) up to 96 h, appropriate immunoreactivity (85.4{+-}1.1%) and high cytotoxicity in HER2 expression cells. 5 fold increase in toxicity of trastuzumab-{sup 177}Lu was observed when compared with unlabeled trastuzumab on SKBr3 cells.

  6. Scintillation properties of a La, Lu-admix gadolinium pyrosilicate crystal

    Energy Technology Data Exchange (ETDEWEB)

    Kurosawa, Shunsuke, E-mail: kurosawa@imr.tohoku.ac.jp [Institute for Materials Research (IMR), Tohoku University 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577 (Japan); New Industry Creation Hatchery Center (NICHe) 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579 (Japan); Shishido, Toetsu; Suzuki, Akira; Sugawara, Takamasa; Nomura, Akiko; Yubuta, Kunio [Institute for Materials Research (IMR), Tohoku University 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577 (Japan); Shoji, Yasuhiro [Institute for Materials Research (IMR), Tohoku University 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577 (Japan); C& A Corporation, 6-6-40 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8577 (Japan); Yokota, Yuui [New Industry Creation Hatchery Center (NICHe) 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579 (Japan); Pejchal, Jan [New Industry Creation Hatchery Center (NICHe) 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579 (Japan); Institute of Physics, AS CR, Cukrovarnická 10, 162 53 Prague (Czech Republic); Ohashi, Yuji [Institute for Materials Research (IMR), Tohoku University 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577 (Japan); Kamada, Kei [New Industry Creation Hatchery Center (NICHe) 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579 (Japan); C& A Corporation, 6-6-40 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8577 (Japan); Yoshikawa, Akira [Institute for Materials Research (IMR), Tohoku University 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577 (Japan); New Industry Creation Hatchery Center (NICHe) 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579 (Japan); C& A Corporation, 6-6-40 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8577 (Japan)

    2015-06-01

    In order to obtain new scintillator with higher effective atomic number, a pyrosilicate crystal with a composition (Ce{sub 0.01}, Gd{sub 0.54}, La{sub 0.25}, Lu{sub 0.20}){sub 2}Si{sub 2}O{sub 7} (Ce:LaLu-GPS) was grown by the floating zone method. Emission wavelengths of this material were at 370 and 390 nm. Gamma-ray-excited pulse height and scintillation decay measurement showed that Ce:LaLu-GPS had a light output of 34,000±2000 photons/MeV, an FWHM energy resolution of 6.9±0.2%, and the decay time components of 59±1 ns (13%) and 570±20 ns (87%)

  7. Standardization and measurement of gamma-ray probability per decay of 177Lu.

    Science.gov (United States)

    Dias, Mauro S; Silva, Fabrício F V; Koskinas, Marina F

    2010-01-01

    The procedure followed by the Nuclear Metrology Laboratory (LMN), at the Nuclear and Energy Research Institute (IPEN), for the primary standardization of (177)Lu is described. This radionuclide is widely used in radiopharmacy due to its convenient half-life and emitted beta ray energies. The (177)Lu solution was supplied during an international comparison sponsored by BIPM in 2009 and the primary standardization has been accomplished by the 4pibeta-gamma coincidence method using a proportional counter in 4pi geometry coupled with two NaI(Tl) scintillation counters. The beta efficiency was varied by placing Collodion and aluminum absorbers over and under the radioactive source. The (177)Lu calibrated sources were also measured in a previously calibrated HPGe spectrometer, in order to obtain the emission probability per decay for the selected gamma-ray transitions. The experimental extrapolation curves were also compared with Monte Carlo simulations by means of code ESQUEMA developed at the LMN.

  8. Electronic and magnetic properties of LuFe{sub 2}O{sub 4}

    Energy Technology Data Exchange (ETDEWEB)

    Kuepper, Karsten [Institut fuer Festkoerperphysik, Universitaet Ulm (Germany); Raekers, Michael; Taubitz, Christian; Prinz, Manuel; Derks, Christine; Neumann, Manfred [Fachbereich Physik, Universitaet Osnabrueck (Germany); Postnikov, Andrei V. [LPMD, Paul Verlaine University and Institute Jean Barriol, Metz (France); Groot, Frank M.F. de [Department of Inorganic Chemistry and Catalysis, Utrecht University (Netherlands); Piamonteze, Cinthia [Swiss Light Source, Paul Scherrer Institut, Villigen (Switzerland); Prabhakaran, Dharmalingam; Blundell, Stephen J. [Department of Physics, University of Oxford, Clarendon Laboratory, Oxford (United Kingdom)

    2010-07-01

    LuFe{sub 2}O{sub 4} is a compound showing fascinating magneto electric coupling via charge ordering. Electronic and magnetic properties of the charge ordered phase of LuFe{sub 2}O{sub 4} are investigated by means of X-ray spectroscopic and theoretical electronic structure approaches. We identified the electronic states of the valence band by means of valence band XPS-, and XES-spectroscopies, and GGA+U first principles calculations. Moreover, by applying XMCD, we are able to identify the spin ground state of LuFe{sub 2}O{sub 4} in the charge ordered phase to be a 2:1 ferrimagnetic configuration, ruling out a frustrated magnetic state.

  9. Predictor-Corrector LU-SGS Discontinuous Galerkin Finite Element Method for Conservation Laws

    Directory of Open Access Journals (Sweden)

    Xinrong Ma

    2015-01-01

    Full Text Available Efficient implicit predictor-corrector LU-SGS discontinuous Galerkin (DG approach for compressible Euler equations on unstructured grids is investigated by adding the error compensation of high-order term. The original LU-SGS and GMRES schemes for DG method are discussed. Van Albada limiter is employed to make the scheme monotone. The numerical experiments performed for the transonic inviscid flows around NACA0012 airfoil, RAE2822 airfoil, and ONERA M6 wing indicate that the present algorithm has the advantages of low storage requirements and high convergence acceleration. The computational efficiency is close to that of GMRES scheme, nearly 2.1 times greater than that of LU-SGS scheme on unstructured grids for 2D cases, and almost 5.5 times greater than that of RK4 on unstructured grids for 3D cases.

  10. A Zeybek folk dance in Blacksea region: Sepetçioğlu

    Directory of Open Access Journals (Sweden)

    Gülşah Yüksel

    2010-12-01

    Full Text Available Normal 0 21 false false false TR X-NONE X-NONE MicrosoftInternetExplorer4 Productions of folk literature consist of emotions, desires, needs, social textures, life dynamisms as well as all accepted behaviours and toughts of a society. Folk dances which is a one dimension of folk literature conveys clues of events that happened in the history up to current times. Story of Sepetcioğlu represents a folk hero who stands for protecting its people. As a version of “zeybek” folk dances, Sepetcioğlu takes an important place in Turkish culture with its swift figures, its story and with its folk song. This study aims document characteristics of Sepetçioğlu folk dance, including its song and its story.

  11. Trakya University Güllapoğlu Arboretum Landscape Planning Studies

    Directory of Open Access Journals (Sweden)

    A. B. Korkut

    2008-09-01

    Full Text Available The aim of this study is to determine the planning rules of the arboretum to be established in Trakya University Güllapoğlu Campus and propose landscape plan. In thıs study, several researches are made on Trakya University Güllapoğlu Arboretum in Trakya University Campus in Edirne. First of all the concept of “Arboretum”, functions, planning and application criteria and the properties of arboretums in Turkey and other countries are studied. The socio-economical structure of Edirne where Güllapoğlu arboretum will be established is studied and the establishg reasons of arboretum in Edirne were determined. Afterwords the natural properties [slop, soil, flora] of the arboretum are collected and the results are analysed.

  12. Characterization of Pr:LuAG scintillating crystals for X-ray spectroscopy

    Science.gov (United States)

    Bertoni, R.; Bonesini, M.; Cervi, T.; Clemenza, M.; De Bari, A.; Falcone, A.; Mazza, R.; Menegolli, A.; Nastasi, M.; Rossella, M.

    2016-07-01

    The main features of the Pr doped Lu3Al5O12 (Pr:LuAG) scintillating crystals for X-ray spectroscopy applications have been studied using different radioactive sources and photo-detectors. Pr:LuAG is cheaper, compared to a Germanium detector, but with remarkable properties which make it useful for many applications, from fundamental physics measurements to the PET imaging for medical purposes: high density, elevate light yield, fast response, high energy resolution, no hygroscopicity. A sample of Pr:LuAG crystals with 14 mm×14 mm surface area and 13 mm thickness and a NaI crystal of the same surface and 26 mm thickness used as a reference have been characterized with several radioactive sources, emitting photons in the range 100-1000keV. Different light detectors were adopted for the Pr:LuAG studies, sensitive to its UV emission (peak at 310 nm): a 3 in. PMT (Hamamatsu R11065) and new arrays of Hamamatsu SiPM S13361, with siliconic resin as a window. Preliminary results are presented on the performance of the Pr:LuAG crystals, to be mounted in a 2 × 2 array to be tested in the 2015 run of the FAMU experiment at RIKEN-RAL muon facility. The goal is the detection of the X-rays (around 130 keV) emitted during the de-excitation processes of the muonic hydrogen after the excitation with an IR laser with wavelength set at the resonance of the hyperfine splitting, to measure the muonic atom proton radius with unprecedented precision.

  13. [177Lu]Bz-DTPA-EGF: Preclinical characterization of a potential radionuclide targeting agent against glioma.

    Science.gov (United States)

    Sundberg, Asa Liljegren; Gedda, Lars; Orlova, Anna; Bruskin, Alexander; Blomquist, Erik; Carlsson, Jörgen; Tolmachev, Vladimir

    2004-04-01

    Patients with glioblastoma multiforme have a poor prognosis due to recurrences originating from spread cells. The use of radionuclide targeting might increase the chance of inactivating single tumor cells with minimal damage to surrounding healthy tissue. As a target, overexpressed epidermal growth factor receptors (EGFR) may be used. A natural ligand to EGFR, the epidermal growth factor (EGF) is an attractive targeting agent due to its low molecular weight (6 kDa) and high affinity for EGFR. 177Lu (T(1/2) = 6.7 days) is a radionuclide well suited for treatment of small tumor cell clusters, since it emits relatively low-energy beta particles. The goal of this study was to prepare and preclinically evaluate both in vitro and in vivo the [177Lu]Bz-DTPA-EGF conjugate. The conjugate was characterized in vitro for its cell-binding properties, and in vivo for its pharmacokinetics and ability to target EGFR. [177Lu]Bz-DTPA-EGF bound to cultured U343 glioblastoma cells with an affinity of 1.9 nM. Interaction with EGFR led to rapid internalization, and more than 70% of the cell-associated radioactivity was internalized after 30 minutes of incubation. The retention of radioactivity was good, with more than 65% of the 177Lu still cell-associated after 2 days. Biodistribution studies of i.v. injected [177Lu]Bz-DTPA-EGF in NMRI mice demonstrated a rapid blood clearance. Most of the radioactivity was found in the liver and kidneys. The liver uptake was receptor-mediated, since it could be significantly reduced by preinjection of unlabeled EGF. In conclusion, [177Lu]Bz-DTPA-EGF seems to be a promising candidate for locoregional treatment of glioblastoma due to its high binding affinity, low molecular weight, and ability to target EGFR in vivo.

  14. Evaluation of two intraoperative gamma detectors for assessment of (177)Lu activity concentration in vivo.

    Science.gov (United States)

    Sandblom, Viktor; Ståhl, Ingun; Olofsson Bagge, Roger; Forssell-Aronsson, Eva

    2017-12-01

    Patients with somatostatin receptor-expressing neuroendocrine tumours can be treated with intravenously administered (177)Lu-octreotate. Few patients are cured with the present protocol due to the current dose limitation of normal organs at risk, such as the kidneys. By locally administering (177)Lu-octreotate to the liver for the purpose of treating liver metastases, a substantially reduced absorbed dose to organs at risk could be achieved. The development of such a technique requires the capability of measuring the (177)Lu activity concentration in tissues in vivo. The aim of this study was to evaluate different performance parameters of two commercially available intraoperative gamma detectors in order to investigate whether intraoperative gamma detector measurements could be used to determine (177)Lu activity concentration in vivo. Measurements were made using different sources containing (177)Lu. Response linearity, sensitivity, spatial resolution and its depth dependence, organ thickness dependence of the measured count rate and tumour detectability were assessed for two intraoperative gamma detectors. The two detectors (a scintillation and a semiconductor detector) showed differences in technical performance. For example, the sensitivity was higher for the scintillation detector, while the spatial resolution was better for the semiconductor detector. Regarding organ thickness dependence and tumour detectability, similar results were obtained for both detectors, and even relatively small simulated tumours of low tumour-to-background activity concentration ratios could be detected. Acceptable results were obtained for both detectors, although the semiconductor detector proved more advantageous for our purpose. The measurements demonstrated factors that must be corrected for, such as organ thickness or dead-time effects. Altogether, intraoperative gamma detector measurements could be used to determine (177)Lu activity concentration in vivo.

  15. A Comparison of Lu You’s Phoenix Hairpin and Elizabeth Barrett Browning’s Sonnets from the Portuguese (43)

    Institute of Scientific and Technical Information of China (English)

    雷华

    2010-01-01

    Both Lu You and Elizabeth Barrett Browning enjoy great popularity as a poet.In this paper I compare and contract Lu You’s well-known love ci-poem Phoenix Hairpin with Elizabeth Barrett Browning’s famous Sonnets from the Portuguese (43) in respect of theme,style,and way of expression.

  16. Optical and scintillation properties of Ce3+ doped LiYF4 and LiLuF4 crystals

    NARCIS (Netherlands)

    Combes, CM; Dorenbos, P; vanEijk, CWE; Pedrini, C; DenHartog, HW; Gesland, JY; Rodnyi, PA

    1997-01-01

    Optical properties of LiYF4:Ce and LiLuF4:Ce were studied viz. optical absorption spectra and X-ray induced emission spectra. The scintillation characteristics of LiYF4:Ce and LiLuF4:Ce were investigated viz. gamma-ray induced pulse height spectra and decay time measurements. A model is presented to

  17. Os modelos de realeza em São Luís, segundo Joinville

    OpenAIRE

    2011-01-01

    O objetivo deste trabalho é identificar os modelos de realeza em Luís IX, rei da França entre 1226 e 1270, tendo como base principalmente a obra de Jean de Joinville intitulada Histoire de Saint Louis. No decorrer da análise, constata-se o caráter peculiar do documento como espelho de príncipe, gênero medieval que procura estabelecer um modelo ideal de realeza. Luís IX é nele retratado como um rei peregrino, cruzado que ampliou o reino de Deus na terra, buscando identificá-lo ao reino de Cris...

  18. Magnetic excitations in multiferroic LuMnO3 studied by inelastic neutron scattering

    Science.gov (United States)

    Lewtas, H. J.; Boothroyd, A. T.; Rotter, M.; Prabhakaran, D.; Müller, H.; Le, M. D.; Roessli, B.; Gavilano, J.; Bourges, P.

    2010-11-01

    We present data on the magnetic and magnetoelastic coupling in the hexagonal multiferroic manganite LuMnO3 from inelastic neutron scattering, magnetization, and thermal-expansion measurements. We measured the magnon dispersion along the main symmetry directions and used this data to determine the principal exchange parameters from a spin-wave model. An analysis of the magnetic anisotropy in terms of the crystal field acting on the Mn is presented. We compare the results for LuMnO3 with data on other hexagonal RMnO3 compounds.

  19. Esthesioneuroblastoma (olfactory neuroblastoma) treated with 111In-octreotide and 177Lu-DOTATATE PRRT.

    Science.gov (United States)

    Makis, William; McCann, Karey; McEwan, Alexander J B

    2015-04-01

    A 51-year-old man with a recurrent metastatic esthesioneuroblastoma (olfactory neuroblastoma) was referred for peptide receptor radionuclide therapy (PRRT). He received 4 treatments of 111In-octreotide over 8 months and 3 treatments of 177Lu-DOTATATE over 4 months, which helped alleviate his symptoms and improved his quality of life; however, the tumor ultimately progressed and he passed away shortly thereafter. PRRT with 111In-octreotide or 177Lu-DOTATATE could play a role in the management of esthesioneuroblastoma.

  20. Proton Decay Studies of the Light Lu, Tm and Ho Isotopes

    Energy Technology Data Exchange (ETDEWEB)

    Akovali, Y.; Batchelder, J.C.; Bingham, C.R.; Davinson, T.; Ginter, T.N.; Gross, C.J.; Grzywacz, R.; Hamilton, J.H.; Janas, Z.; Karny, M.; Kim, S.H.; MacDonald, B.D.; Mas, J.F.; McConnell, J.W.; Piechaczek, A.; Ressler, J.J.; Rykaczewski, K.; Slinger, R.C.; Szerypo, J.; Toth, K.S.; Weintraub, W.; Woods, P.J.; Yu, C.-H.; Zganjar, E.F.

    1998-10-15

    A double-sided Si-strip detector system has been installed and commissioned at the focal plane of the Recoil Mass Spectrometer at the Holifield Radioactive Ion Beam Facility. The system can be used for heavy charged particle emission studies with half-lives as low as a few {micro}sec. In this paper the authors present identification and study of the decay properties of the five new proton emitters: {sup 140}Ho, {sup 141m}Ho, {sup 145}Tm, {sup 150m}Lu and {sup 151m}Lu.

  1. Optimization of LSO/LuYAP phoswich detector for small animal PET

    Science.gov (United States)

    Jung, Jin Ho; Choi, Yong; Chung, Yong Hyun; Devroede, Olivier; Krieguer, Magalie; Bruyndonckx, Peter; Tavernier, Stefaan

    2007-02-01

    LSO/LuYAP phoswich detectors for small animal PET were developed to measure the depth of interaction (DOI), and to improve the spatial resolution at the edge of the field of view (FOV). The aim of this study was to optimize the optical coupling conditions between the crystal and photomultiplier tube (PMT) to maximize the light-collection efficiency, and to develop a method for rejecting scatter events by applying an equal energy window in each crystal layer. The light yields of the phoswich detector were estimated by changing the refractive index of the optical coupling material using a DETECT simulation. The accuracy of the DOI measurement on the phoswich detector, using an optical coupling material with the optimal light yield, were evaluated experimentally and compared with the air condition. The energy window for the photopeak events cannot be applied properly because the light outputs of LSO and LuYAP are different. The LSO/LuYAP photopeaks need to be superposed in order to effectively discriminate the scattered events by applying an equal energy window. The photopeaks of the LSO and LuYAP can be superposed by inserting a reflecting material between the crystals. The optimal coverage ratio of the inserting material was derived from a DETECT simulation, and its performance was investigated. In the simulation result, optimal refractive index of the optical coupling material was 1.7. The average DOI measurement errors of the LSO/LuYAP were 0.6%/3.4% and 4.9%/41.4% in the phoswich detector with and without an optical coupling material, respectively. The photopeaks of the LSO and LuYAP were superposed by covering 75% of the contact surface between the crystals with white Teflon. The DOI measurement errors of the LSO/LuYAP were 0.2%/2.4%. In this study, the optimal condition of the optical coupling material inserted between the crystal and PMT was derived to improve the accuracy of DOI measurement, and a photopeak superposition method of the LSO and LuYAP was

  2. Production of non carrier added (n.c.a.) {sup 177}Lu for radiopharmaceutical applications

    Energy Technology Data Exchange (ETDEWEB)

    Barkhausen, Christoph

    2011-09-06

    The goal of this dissertation was the development of a process to produce non carrier added {sup 177}Lu at the FRM II. For this purpose, preparative chromatographic methods were evaluated and applied. The highest quality of the nuclide which could only be achieved through a complex chemical process, has been already been proven by clinical studies to be very advantageous. The process has been built up in a hot cell as a semi-automated process and is now being adapted to the requirements of the 'Arzneimittelgesetz' in order to establish n.c.a. {sup 177}Lu as a pharmaceutical product.

  3. Anisotropic Multiband Many-Body Interactions in LuNi2B2C

    Energy Technology Data Exchange (ETDEWEB)

    Bergk, B.; Petzold, V.; Rosner, H.; Drechsler, S.-L.; Bartkowiak, M.; Ignatchik, O.; Bianchi, A. D.; Sheikin, I.; Canfield, P. C.; Wosnitza, J.

    2008-06-27

    We present a comprehensive de Haas-van Alphen study on the nonmagnetic borocarbide superconductor LuNi{sub 2}B{sub 2}C. The analysis of the angular-dependent effective masses for different bands in combination with full-potential density functional calculations allowed us to determine the mass-enhancement factors, {lambda}, for the different electronic bands and their wave-vector dependences. Our data clearly show the anisotropic multiband character of the superconductivity in LuNi{sub 2}B{sub 2}C.

  4. The regulation of prostitution in Beyoğlu (1875-1915).

    Science.gov (United States)

    özbek, Müge

    2010-01-01

    This study examines the development and nature of the regulation of prostitution in Beyoğlu during the late Ottoman Empire with special emphasis on the way the regulationist regime reinforced existing patterns of class and gender domination. The regulation of prostitution became a matter of urgency in the last decades of the nineteenth century in Istanbul, particularly in Beyoğlu, the cosmopolitan centre of the city. Through this process, the protests of the local residents of the area objecting to the proliferation of prostitution in their neighbourhoods played a crucial role in prompting the governmental authorities to tighten the regulations.

  5. A QSPR for the plasticization efficiency of polyvinylchloride plasticizers.

    Science.gov (United States)

    Chandola, Mridula; Marathe, Sujata

    2008-01-01

    A simple quantitative structure property relationship (QSPR) for correlating the plasticization efficiency of 25 polyvinylchloride (PVC) plasticizers was obtained using molecular modeling. The plasticizers studied were-aromatic esters (phthalate, terephthalate, benzoate, trimellitate), aliphatic esters (adipate, sebacate, azelate), citrates and a phosphate. The low temperature flex point, Tf, of plasticized polyvinylchloride resins was considered as an indicator of plasticization efficiency. Initially, we attempted to predict plasticization efficiency of PVC plasticizers from physical and structural descriptors derived from the plasticizer molecule alone. However, the correlation of these descriptors with Tf was not very good with R=0.78 and r2=0.613. This implied that the selected descriptors were unable to predict all the interactions between PVC and plasticizer. Hence, to account for these interactions, a model containing two polyvinylchloride (PVC) chain segments along with a plasticizer molecule in a simulation box was constructed, using molecular mechanics. A good QSPR equation correlating physical and structural descriptors derived from the model to Tf of the plasticized resins was obtained with R=0.954 and r2=0.909.

  6. Tl response of KMgF{sub 3}: Lu + PTFE at ultraviolet radiation; Respuesta Tl de KMgF{sub 3}: Lu + PTFE a radiacion ultravioleta

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez, P.R. [Instituto Nacional de Investigaciones Nucleares, A.P. 18 -1027, 11801 Mexico D.F. (Mexico); Alarcon, N.G. [Facultad de Quimica, Universidad Autonoma del Estado de Mexico. Paseo Tollocan, Esq. con Jesus Carranza, 50180 Toluca, Estado de Mexico (Mexico); Furetta, C.; Azorin, J. [Universidad Autonoma Metropolitana- Iztapalapa, San Rafael Atlixco 186, 09340 Mexico. D.F. (Mexico)

    2003-07-01

    Ionizing radiation has different types of interaction with a crystalline solid. However, only few effects are interesting to optimize some thermoluminescent (Tl) properties of certain Tl materials. This paper presents results obtained by irradiating KMgF{sub 3}: Lu + Ptfe Tl dosimeters with ultraviolet (UV) radiation previously exposed to gamma radiation. These results showed that those dosimeters not exposed previously to gamma radiation did not presented any Tl signal. Meanwhile, those previously submitted to gamma irradiation showed that their sensitivity was increased as the gamma dose increased. The glow curve of sensitized KMgF{sub 3}: Lu + Ptfe exposed to UV radiation, presented the dosimetric pea at 212 C. This makes this material to be promissory for measuring UV radiation. (Author)

  7. Luminescence Properties of Tb3+-Doped LuAG Films Prepared by Pechini Sol-Gel Method

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    Lu3Al5O12 (LuAG) thin films with different Tb3+ concentration were prepared on carefully cleaned (111) silicon wafer by a Pechini process and dip-coating technique. Heat treatment was performed in the temperature range from 800 to 1100 ℃. The crystal structure was analyzed by XRD. The results show that LuAG film starts to crystallize at about 900 ℃, and the particle size increases with the sintering temperature. Excitation and emission spectra of Tb3+ doped LuAG films were measured. The effects of heat-treatment temperature and doping concentration of Tb3+ on the luminescent properties were also investigated. For a comparison study, Tb3+-doped LuAG powders were also prepared by the same sol-gel method.

  8. Comparison of the luminescent properties of LuAG:Pr nanopowders, crystals and films using synchrotron radiation

    Science.gov (United States)

    Gorbenko, V.; Zych, E.; Voznyak, T.; Nizankovskiy, S.; Zorenko, T.; Zorenko, Yu.

    2017-04-01

    Comparison of the luminescent properties of nanopowder, single crystal and single crystalline film of Pr3+ doped Pr-doped Lu3Al5O12 garnet (LuAG:Pr) prepared by the different technological methods is performed in this work using the time-resolved emission spectroscopy under excitation by synchrotron radiation with an energy of 3.7-25 eV at 300 K and 10 K. The notable differences in the properties of the Pr3+ luminescence are observed in LuAG:Pr crystals and films caused by involving the LuAl antisite defects and oxygen vacancies in crystals and Pb2+ flux related dopant in films in the excitation processes of the Pr3+ luminescence. At the same time, we have also found that the influence of host defects on the Pr3+ luminescence is significantly smaller in the LuAG:Pr nanopowders.

  9. Sustainable reverse logistics for household plastic waste

    OpenAIRE

    Bing, X

    2014-01-01

    Summary of the thesis titled “Sustainable Reverse Logistics for Household Plastic Waste” PhD Candidate: Xiaoyun Bing Recycled plastic can be used in the manufacturing of plastic products to reduce the use of virgin plastics material. The cost of recycled plastics is usually lower than that of virgin plastics. Therefore, it is environmentally and economically beneficial to improve the plastic recycling system to ensure more plastic waste from households is properly collected and pr...

  10. Meteorite zircon constraints on the bulk Lu-Hf isotope composition and early differentiation of the Earth.

    Science.gov (United States)

    Iizuka, Tsuyoshi; Yamaguchi, Takao; Hibiya, Yuki; Amelin, Yuri

    2015-04-28

    Knowledge of planetary differentiation is crucial for understanding the chemical and thermal evolution of terrestrial planets. The (176)Lu-(176)Hf radioactive decay system has been widely used to constrain the timescales and mechanisms of silicate differentiation on Earth, but the data interpretation requires accurate estimation of Hf isotope evolution of the bulk Earth. Because both Lu and Hf are refractory lithophile elements, the isotope evolution can be potentially extrapolated from the present-day (176)Hf/(177)Hf and (176)Lu/(177)Hf in undifferentiated chondrite meteorites. However, these ratios in chondrites are highly variable due to the metamorphic redistribution of Lu and Hf, making it difficult to ascertain the correct reference values for the bulk Earth. In addition, it has been proposed that chondrites contain excess (176)Hf due to the accelerated decay of (176)Lu resulting from photoexcitation to a short-lived isomer. If so, the paradigm of a chondritic Earth would be invalid for the Lu-Hf system. Herein we report the first, to our knowledge, high-precision Lu-Hf isotope analysis of meteorite crystalline zircon, a mineral that is resistant to metamorphism and has low Lu/Hf. We use the meteorite zircon data to define the Solar System initial (176)Hf/(177)Hf (0.279781 ± 0.000018) and further to identify pristine chondrites that contain no excess (176)Hf and accurately represent the Lu-Hf system of the bulk Earth ((176)Hf/(177)Hf = 0.282793 ± 0.000011; (176)Lu/(177)Hf = 0.0338 ± 0.0001). Our results provide firm evidence that the most primitive Hf in terrestrial zircon reflects the development of a chemically enriched silicate reservoir on Earth as far back as 4.5 billion years ago.

  11. ¹⁷⁷Lu-Labeled Agents for Neuroendocrine Tumor Therapy and Bone Pain Palliation in Uruguay.

    Science.gov (United States)

    Balter, Henia; Victoria, Trindade; Mariella, Terán; Javier, Gaudiano; Rodolfo, Ferrando; Andrea, Paolino; Graciela, Rodriguez; Juan, Hermida; Eugenia, De Marco; Patricia, Oliver

    2016-01-01

    Lutetium-177 is an emerging radionuclide due its convenient chemical and nuclear properties. In this paper we describe the development and evaluation in Uruguay of the targeted 177Lu labelled radiopharmaceuticals EDTMP (for bone pain palliation) and DOTA-TATE (neuroendocrine tumors). We optimized the preparation of these 177Lu radiopharmaceuticals including radiolabelling, quality control methods, in vitro and in vivo stability and their therapeutic application in patients. Radiation dosimetry aspects of 177Lu are also included. Nine male patients with prostate cancer and four female patients with breast carcinoma with multiple bone metastatic lesions were treated with 177Lu-EDTMP. Four patients with gastroentheropancreatic neuroendocrine tumors (GEP-NET) and one patient with bronchial NET were treated with 1- 3 cycles with a cumulative dose of 4.44-22.2 GBq of 177Lu-DOTA-TATE. Scintigraphic images of the patients treated with 177Lu-EDTMP evidenced high and rapid uptake in bone metastasis, remaining after 7 days post administration. Images allow skeletal visualization with high definition and demonstrate increased uptake in bone metastases. For 177Lu-DOTA-TATE, partial remissions were obtained in 4 patients and the remaining patient did not show significant progression 3 months after the second cycle. No serious adverse effects were registered, even in two patients with confirmed renal disease and high risk for renal disease Dosimetry assessments confirm the predictive value of the personalized therapy with radiolabelled peptides. We found it is possible to accumulate high therapeutic doses in tumours in sequential administrations of 177Lu-DOTA-TATE, increasing the probability of biological response without significant impairment of the renal function in patients with risk factors. These results demonstrate the attractive therapeutic properties of these two 177Lu labelled agents and the feasibility of this metabolic therapy in regions far away from 177Lu producing

  12. Plasticity modeling & computation

    CERN Document Server

    Borja, Ronaldo I

    2013-01-01

    There have been many excellent books written on the subject of plastic deformation in solids, but rarely can one find a textbook on this subject. “Plasticity Modeling & Computation” is a textbook written specifically for students who want to learn the theoretical, mathematical, and computational aspects of inelastic deformation in solids. It adopts a simple narrative style that is not mathematically overbearing, and has been written to emulate a professor giving a lecture on this subject inside a classroom. Each section is written to provide a balance between the relevant equations and the explanations behind them. Where relevant, sections end with one or more exercises designed to reinforce the understanding of the “lecture.” Color figures enhance the presentation and make the book very pleasant to read. For professors planning to use this textbook for their classes, the contents are sufficient for Parts A and B that can be taught in sequence over a period of two semesters or quarters.

  13. Low temperature creep plasticity

    Directory of Open Access Journals (Sweden)

    Michael E. Kassner

    2014-07-01

    Full Text Available The creep behavior of crystalline materials at low temperatures (T < 0.3Tm is discussed. In particular, the phenomenological relationships that describe primary creep are reviewed and analyzed. A discussion of the activation energy for creep at T < 0.3Tm is discussed in terms of the context of higher temperature activation energy. The basic mechanism(s of low temperature creep plasticity are discussed, as well.

  14. New perspectives in plastic biodegradation.

    Science.gov (United States)

    Sivan, Alex

    2011-06-01

    During the past 50 years new plastic materials, in various applications, have gradually replaced the traditional metal, wood, leather materials. Ironically, the most preferred property of plastics--durability--exerts also the major environmental threat. Recycling has practically failed to provide a safe solution for disposal of plastic waste (only 5% out of 1 trillion plastic bags, annually produced in the US alone, are being recycled). Since the most utilized plastic is polyethylene (PE; ca. 140 million tons/year), any reduction in the accumulation of PE waste alone would have a major impact on the overall reduction of the plastic waste in the environment. Since PE is considered to be practically inert, efforts were made to isolate unique microorganisms capable of utilizing synthetic polymers. Recent data showed that biodegradation of plastic waste with selected microbial strains became a viable solution. Copyright © 2011 Elsevier Ltd. All rights reserved.

  15. Microelectronics plastic molded packaging

    Energy Technology Data Exchange (ETDEWEB)

    Johnson, D.R. [Ktech Corp., Albuquerque, NM (United States); Palmer, D.W.; Peterson, D.W. [Sandia National Lab., Albuquerque, NM (United States)] [and others

    1997-02-01

    The use of commercial off-the-shelf (COTS) microelectronics for nuclear weapon applications will soon be reality rather than hearsay. The use of COTS for new technologies for uniquely military applications is being driven by the so-called Perry Initiative that requires the U.S. Department of Defense (DoD) to accept and utilize commercial standards for procurement of military systems. Based on this philosophy, coupled with several practical considerations, new weapons systems as well as future upgrades will contain plastic encapsulated microelectronics. However, a conservative Department of Energy (DOE) approach requires lifetime predictive models. Thus, the focus of the current project is on accelerated testing to advance current aging models as well as on the development of the methodology to be used during WR qualification of plastic encapsulated microelectronics. An additional focal point involves achieving awareness of commercial capabilities, materials, and processes. One of the major outcomes of the project has been the definition of proper techniques for handling and evaluation of modern surface mount parts which might be used in future systems. This program is also raising the familiarity level of plastic within the weapons complex, allowing subsystem design rules accommodating COTS to evolve. A two year program plan is presented along with test results and commercial interactions during this first year.

  16. Interfacial interactions between plastic particles in plastics flotation.

    Science.gov (United States)

    Wang, Chong-qing; Wang, Hui; Gu, Guo-hua; Fu, Jian-gang; Lin, Qing-quan; Liu, You-nian

    2015-12-01

    Plastics flotation used for recycling of plastic wastes receives increasing attention for its industrial application. In order to study the mechanism of plastics flotation, the interfacial interactions between plastic particles in flotation system were investigated through calculation of Lifshitz-van der Waals (LW) function, Lewis acid-base (AB) Gibbs function, and the extended Derjaguin-Landau-Verwey-Overbeek potential energy profiles. The results showed that van der Waals force between plastic particles is attraction force in flotation system. The large hydrophobic attraction, caused by the AB Gibbs function, is the dominant interparticle force. Wetting agents present significant effects on the interfacial interactions between plastic particles. It is found that adsorption of wetting agents promotes dispersion of plastic particles and decreases the floatability. Pneumatic flotation may improve the recovery and purity of separated plastics through selective adsorption of wetting agents on plastic surface. The relationships between hydrophobic attraction and surface properties were also examined. It is revealed that there exists a three-order polynomial relationship between the AB Gibbs function and Lewis base component. Our finding provides some insights into mechanism of plastics flotation.

  17. Low threshold monocrystalline Nd:(Gd,Lu)2O3 channel waveguide laser

    NARCIS (Netherlands)

    Kahn, Andreas; Heinrich, Sebastian; Kühn, Henning; Petermann, Klaus; Bradley, J.; Worhoff, Kerstin; Pollnau, Markus; Huber, Günther

    2009-01-01

    We report the first waveguide laser based on a rare-earth-doped sesquioxide. A 2 μm thick lattice matched Nd(0.5%):${(Gd, Lu)_2O_3}$ film with a nearly atomically flat surface has been epitaxially grown on a $Y_2O_3$ substrate, using pulsed laser deposition. The film has been structured with reactiv

  18. THE USE OF SEMI INHERITED LU FACTORIZATION OF MATRICES IN INTERPOLATION OF DATA

    Directory of Open Access Journals (Sweden)

    MOHAMMAD ALI FARIBORZI ARAGHI

    2009-04-01

    Full Text Available The polynomial interpolation in one dimensional space R is an important method to approximate the functions. The Lagrange and Newton methods are two well known types of interpolations. In this work, we describe the semi inherited interpolation for approximating the values of a function. In this case, the interpolation matrix has the semi inherited LU factorization.

  19. Enhanced local lattice distortions with the antiferromagnetic transition in the multiferroic LuMnO3

    Science.gov (United States)

    Louca, Despina; Proffen, Thomas; Lee, Seung-Hun; Cheong, Sang-Wook

    2009-03-01

    The ferroelectric hexagonal manganite, LuMnO3, has been investigated via neutron scattering and the pair density function analysis to determine the nature of the local atomic distortions with the antiferromagnetic transition, TN, of the Mn ions. While in previously reported neutron diffraction data, it was shown that all atomic coordinates changed based on symmetry considerations with TN, we hereby show that it is the ferroelectric motion of the Lu ions coupled with O distortions that exhibits a strong temperature dependence below TN as reflected in the Lu-O bonds. This suggests an enhancement of the net electric polarization below TN. At the same time, the motion of the apical O1 and O2 ions distorts the MnO5 bipyramids, leading to more buckling of the ab-layers. However, the Mn ions do not appear to distort significantly away from their equilibrium position. The oxygen distortions induced with the spin reorientations below TN may be the cause for the Lu ion displacements through electrostatic interactions and this in turn produces coupling to the electric dipole moments.

  20. Hüsteeria, seks ja selektiivne mälu / Anneli Porri

    Index Scriptorium Estoniae

    Porri, Anneli, 1980-

    2006-01-01

    Marge Monko näitus "Uurimusi kodanlusest" (Charcot' klassifitseeritud krambiasendeid esitab tantsija Krõõt Juurak) Hobusepea galeriis 17.-22. V; Jane Suviste ja Piibe Piirma näitus "Editeeritud mälu" Tallinna Linnagaleriis kuni 28. V; Andres Lõo kureeritud noortenäitus "Sex" Vaal-galeriis 2.-20. V

  1. Transport properties of Ho1- x Lu x B12 solid solutions

    Science.gov (United States)

    Gabáni, S.; Bat'ko, I.; Bat'ková, M.; Flachbart, K.; Gaz̆o, E.; Pristás̆, G.; Takác̆ová, I.; Bogach, A. V.; Sluchanko, N. E.; Shitsevalova, N. Yu.

    2013-05-01

    Our studies of Ho1- x Lu x B12 solid solutions have shown that the temperature of antiferromagnetic (AF) order in geometrically frustrated system of HoB12 ( T N = 7.4 K) is linearly suppressed to zero temperature, i.e. T N → 0, as lutetium concentration increases to x→ x c ≈ 0.9. In this contribution, we present original results of electrical resistivity measurements on Ho1- x Lu x B12 single crystalline samples with x = 0, 0.2, 0.5, 0.7, 0.9, 1 in the temperature range 0.06-300 K and in magnetic fields ( B) up to 8 T. Complex B vs T N phase diagrams were received from precise temperature ρ( T) and field ρ( B) dependences of resistivity with several AF phases for x ≤ 0.5 pointing to a possibility of quantum critical point at x c ≈ 0.9. The scattering of conduction electrons in the AF phase and in the paramagnetic phase as well as Hall effect results are analyzed and discussed for various concentrations x, when magnetic dilution increases with the increasing content of nonmagnetic Lu ions in the Ho1- x Lu x B12 system.

  2. Hüsteeria, seks ja selektiivne mälu / Anneli Porri

    Index Scriptorium Estoniae

    Porri, Anneli, 1980-

    2006-01-01

    Marge Monko näitus "Uurimusi kodanlusest" (Charcot' klassifitseeritud krambiasendeid esitab tantsija Krõõt Juurak) Hobusepea galeriis 17.-22. V; Jane Suviste ja Piibe Piirma näitus "Editeeritud mälu" Tallinna Linnagaleriis kuni 28. V; Andres Lõo kureeritud noortenäitus "Sex" Vaal-galeriis 2.-20. V

  3. lu olemuse jälile juhatas meritigu / Tiit Kändler

    Index Scriptorium Estoniae

    Kändler, Tiit, 1948-

    2000-01-01

    Columbia ülikooli teadlane, tänavuse Nobeli meditsiini- ja füsioloogiapreemia saanud Eric Kandel uuris aplüüsia toel välja, kuidas aju asju mäletab. Skeem : Mälu põhineb keemiliste muutuste säilitamisel

  4. Attēlu apstrādes rīks datorredzes algoritmiem

    OpenAIRE

    Briņģe, Līna

    2016-01-01

    Kvalifikācijas darba produkts "Attēlu apstrādes rīks datorredzes algoritmiem" ir lietojumprogramma, kas paredzēta ātrai un vieglai attēlu apstrādei. Šīs programmas mērķis ir padarīt ērtāku un ātrāku attēlu kopu sagatavošanu, kas paredzētas dažādu datorredzes algoritmu izmantošanai un testēšanai. Programma piedāvā lietotājam izgriezt attēla reģionus, atlasīt vēlamos saglabāšanas kritērijus un eksportēt iegūtos datus kā jaunus attēlus. Tā rezultātā tiek iegūts ievadattēlu aprakstošs fails, kas ...

  5. 1047-nm all-solid-state laser based on Nd: LuLF

    Institute of Scientific and Technical Information of China (English)

    Rui Li; Ting Yu; Lianhan Zhang; Weibiao Chen; Yin Hang

    2011-01-01

    @@ A compact all-solid-state continuous-wave (CW) laser at 1047 nm is developed based on Nd:LuLF, which is grown through the Czochralski technique. From the laser system, 1.3-W laser can be obtained, which corresponds to the slope efficiencies of 20.1% and 49.5% with respect to the incident and absorbed pump powers, respectively. To the best of our knowledge, this is the highest power level achieved at 1047 nm based on the Nd:LuLF crystal.%A compact all-solid-state continuous-wave (CW) laser at 1047 nm is developed based on Nd:LuLF, which is grown through the Czochralski technique. From the laser system, 1.3-W laser can be obtained, which corresponds to the slope efficiencies of 20.1% and 49.5% with respect to the incident and absorbed pump powers, respectively. To the best of our knowledge, this is the highest power level achieved at 1047 nm based on the Nd:LuLF crystal.

  6. Three-phonon stimulated Raman scattering in an orthorhombic LuAlO3 crystal

    Science.gov (United States)

    Kaminskii, A. A.

    2016-12-01

    High-order stimulated Raman scattering (SRS) has been revealed in a LuAlO3 crystal upon stationary picosecond laser excitation. All recorded Stokes and anti-Stokes χ(3)-nonlinear laser components are attributed to three SRS-promoting A g vibrational modes of its octahedral anionic units (AlO3)-3.

  7. EXAFS investigation and luminescent properties of nanosized Tb: Lu2O3 phosphors

    Institute of Scientific and Technical Information of China (English)

    REN

    2010-01-01

    Nanosized terbium doped Lu2O3 phosphors were synthesized via a modified co-precipitation processing.The as-prepared Tb:Lu2O3 phosphors was consisted of well crystallized nanosized sphere particles with a diameter of about 30 nnx Local structure of Tb ions in Lu2O3 lattice was investigated by an analytical approach based on Fourier transformation of the extended X-ray absorption fine structure(EXAFS) data.X-ray near edge structure (XANES) spectra suggested that all Tb ions doped were tervalonce.EXAFS results indicated that Tb ions have entered the Lu2O3 cubic lattice by means of solid solution.The coordination number and first shell Tb-O distance dropped with the increasing of Tb concentration.Emission spectra of the phosphors was shown to be typical for Tb3+ with main components at 542,550 and 490 nm,derived from irradiative relaxation of 5D4 level.The emission intensity decreased severely with the increasing of Tb concentration from 1 mol.% to 15 tool.%,suggesting a significant concentration quenching above 1 mol.% Tb.The reduction of emission intensity was interpreted by higher distortion derived relaxation among the surface state resident Tb3+ ions.

  8. lu olemuse jälile juhatas meritigu / Tiit Kändler

    Index Scriptorium Estoniae

    Kändler, Tiit, 1948-

    2000-01-01

    Columbia ülikooli teadlane, tänavuse Nobeli meditsiini- ja füsioloogiapreemia saanud Eric Kandel uuris aplüüsia toel välja, kuidas aju asju mäletab. Skeem : Mälu põhineb keemiliste muutuste säilitamisel

  9. Pärnu Õlu omanikuks sai Soome ärimees / Andris Feldmanis

    Index Scriptorium Estoniae

    Feldmanis, Andris, 1982-

    2004-01-01

    Pärnu Õlletehase senine suuromanik Charlie Viikberg müüs oma osaluse Soome ärimehele Carl-Erik Sundbladile kuuluvale CES Holding AS-ile. Uue omaniku peaeesmärgiks kasvatada turuosa 10 protsendile. Diagramm: Pärnu Õlu väikeses kasumis

  10. An Improved Algorithm for Parallel Sparse LU Decomposition on a Distributed-Memory Multiprocessor

    NARCIS (Netherlands)

    Koster, J.; Bisseling, R.H.

    2001-01-01

    In this paper we present a new parallel algorithm for the LU decomposition of a general sparse matrix Among its features are matrix redistribution at regular intervals and a dynamic pivot search strategy that adapts itself to the number of pivots produced. Experimental results obtained on a network

  11. Demonstration of a hybrid Ho:YLF Ho:LuLF slab laser

    CSIR Research Space (South Africa)

    Esser, MJD

    2010-10-01

    Full Text Available The authors present a continuous-wave slab laser utilising both Ho:YLF and Ho:LuLF as laser gain media. 30 W of output power at 2 µm was demonstrated in a stable concave-plane resonator while 13 W was achieved in a hybrid stable...

  12. Bright Lu2 O3 :Eu Thin-Film Scintillators for High-Resolution Radioluminescence Microscopy.

    Science.gov (United States)

    Sengupta, Debanti; Miller, Stuart; Marton, Zsolt; Chin, Frederick; Nagarkar, Vivek; Pratx, Guillem

    2015-07-16

    The performance of a new thin-film Lu2 O3 :Eu scintillator for single-cell radionuclide imaging is investigated. Imaging the metabolic properties of heterogeneous cell populations in real time is an important challenge with clinical implications. An innovative technique called radioluminescence microscopy has been developed to quantitatively and sensitively measure radionuclide uptake in single cells. The most important component of this technique is the scintillator, which converts the energy released during radioactive decay into luminescent signals. The sensitivity and spatial resolution of the imaging system depend critically on the characteristics of the scintillator, that is, the material used and its geometrical configuration. Scintillators fabricated using conventional methods are relatively thick and therefore do not provide optimal spatial resolution. A thin-film Lu2 O3 :Eu scintillator is compared to a conventional 500 μm thick CdWO4 scintillator for radioluminescence imaging. Despite its thinness, the unique scintillation properties of the Lu2 O3 :Eu scintillator allow us to capture single-positron decays with fourfold higher sensitivity, which is a significant achievement. The thin-film Lu2 O3 :Eu scintillators also yield radioluminescence images where individual cells appear smaller and better resolved on average than with the CdWO4 scintillators. Coupled with the thin-film scintillator technology, radioluminescence microscopy can yield valuable and clinically relevant data on the metabolism of single cells. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  13. Weak antilocalization effect and noncentrosymmetric superconductivity in a topologically nontrivial semimetal LuPdBi

    KAUST Repository

    Xu, Guizhou

    2014-07-21

    A large number of half-Heusler compounds have been recently proposed as three-dimensional (3D) topological insulators (TIs) with tunable physical properties. However, no transport measurements associated with the topological surface states have been observed in these half-Heusler candidates due to the dominating contribution from bulk electrical conductance. Here we show that, by reducing the mobility of bulk carriers, a two-dimensional (2D) weak antilocalization (WAL) effect, one of the hallmarks of topological surface states, was experimentally revealed from the tilted magnetic field dependence of magnetoconductance in a topologically nontrivial semimetal LuPdBi. Besides the observation of a 2D WAL effect, a superconducting transition was revealed at T c ∼ 1.7â.K in the same bulk LuPdBi. Quantitative analysis within the framework of a generalized BCS theory leads to the conclusion that the noncentrosymmetric superconductivity of LuPdBi is fully gapped with a possibly unconventional pairing character. The co-existence of superconductivity and the transport signature of topological surface states in the same bulk alloy suggests that LuPdBi represents a very promising candidate as a topological superconductor.

  14. Pretargeted 177Lu radioimmunotherapy of carcinoembryonic antigen-expressing human colonic tumors in mice.

    NARCIS (Netherlands)

    Schoffelen, R.; Graaf, W.T.A. van der; Franssen, G.M.; Sharkey, R.M.; Goldenberg, D.M.; McBride, W.J.; Rossi, E.A.; Eek, A.; Oyen, W.J.G.; Boerman, O.C.

    2010-01-01

    Pretargeted radioimmunotherapy (PRIT) with bispecific antibodies in combination with a radiolabeled peptide reduces the radiation dose to normal tissues, especially the bone marrow. In this study, the optimization, therapeutic efficacy, and toxicity of PRIT of colon cancer with a (177)Lu-labeled pep

  15. Unustagem kõvaketas, kasutagem operatiivmälu! / Katrin Ruus

    Index Scriptorium Estoniae

    Ruus, Katrin

    2008-01-01

    Valik Mart Viljuse, Katrin Teesi, Piret Räni, Reimo Võsa-Tangsoo, Merle ja Erki Kannuse ning rühmituste Puhas Rõõm ja Infotankistid viimaste aastate töödest näituseprojektina "Operatiivmälu" Pärnu Kunstnike Maja galeriis ja Pärnu Linnagaleriis. 11 ill

  16. Measurements of conversion electrons in the s-process branching point nucleus {sup 176}Lu

    Energy Technology Data Exchange (ETDEWEB)

    Battaglia, A.; Tan, W.; Avetisyan, R.; Casarella, C.; Gyurijinyan, A.; Manukyan, K.V.; Marley, S.T.; Nystrom, A.; Paul, N.; Siegl, K.; Smith, K.; Smith, M.K.; Strauss, S.Y.; Aprahamian, A. [University of Notre Dame, Department of Physics, Notre Dame, IN (United States)

    2016-05-15

    Conversion coefficients, gamma-gamma and gamma-electron coincidences were measured in the s-process branching point nucleus {sup 176}Lu. Our goal was to determine the multipolarities of the γ-ray transitions that connect the high and low K states of {sup 176}Lu. This {sup 176}Lu nucleus has a long-lived ground state (K=7{sup -}) of 37.6 Gy, a short-lived isomeric state (K=0{sup -}) at 122.8 keV with half-life of 3.6 h, as well as a 58 μs isomer at 1588 keV (K=14{sup +}). The excitation structure of this nucleus contains bands of intermediate spins of both positive and negative parities. The intermediate states can under certain stellar temperatures completely change the equilibrium between the isomer and ground state of {sup 176}Lu and change the abundance of this nucleus. We populated 37 previously known levels in this nucleus via the {sup 176}Yb(p,n) reaction and measured 42 conversion coefficients for γ-ray transitions including 17 of them for the first time. (orig.)

  17. Crystal fields at light rare-earth ions in Y and Lu

    DEFF Research Database (Denmark)

    Touborg, P.; Nevald, Rolf; Johansson, Torben

    1978-01-01

    Crystal-field parameters have been deduced for the light rare-earth solutes Ce, Pr, and Nd in Y or Lu hosts from measurements of the paramagnetic susceptibilities. In the analysis all multiplets in the lowest LS term were included. For a given host, crystal-field parameters divided by Stevens fac...

  18. Forward to cryogenic temperature: laser cooling of Yb: LuLiF crystal

    Science.gov (United States)

    Zhong, Biao; Luo, Hao; Lei, Yongqing; Shi, Yanling; Yin, Jianping

    2017-06-01

    The high quality Yb-doped fluoride crystals have broad prospects for optical refrigeration. We have laser cooled the Yb:LuLiF crystal to a temperature below the limit of current thermoelectric coolers ( 180 K). The 5% Yb:LuLiF crystal sample has a geometry of 2 mm×2 mm×5 mm and was supported by two fibers of 200 μm in diameter. They were placed in a 2×10-4 Pa vacuum chamber with an environment temperature of 294.5 K. The 1019 nm CW laser of power 38.7 W was adopted to irradiate the sample. The temperature of the sample was measured utilizing the DLT methods. After 20 minutes of laser irradiation, the 5% Yb:LuLiF crystal sample was cooled down to 182.4 K. By further optimizing experimental conditions and increasing the doped Yb concentration, the Yb:LuLiF crystal might be optically cooled below the cryogenic temperature of 123K in the near future.

  19. Vene uut kunsti ühendab mälu / Teet Veispak

    Index Scriptorium Estoniae

    Veispak, Teet, 1955-

    2007-01-01

    Näitusest "Mälu tagasitulek" Kumu Kunstimuuseumis, kuraator Viktor Misiano. Lähemalt David Ter-Oganjani (sünd. 1981) tööst "Vanad loosungid", Dmitri Prigovi (sünd. 1940) videost, Juri Leidermani installatsioonist "Isa jutustus", Jevgeni Fiksi tööst "Song of Russia"

  20. 2014年鲁迅研究述评%Review on the Research of Lu Xun in 2014

    Institute of Scientific and Technical Information of China (English)

    崔云伟; 刘增人

    2015-01-01

    In 2014, the study on Lu Xun's works took on a splendid and innovative situation.Wu Yiqin, Zhou Nan, Zhang Ke, etc.all presented brilliant ideas on Lu Xun's novels.Qian Liqun's research on Wild Grass,Yang Yi and Song Jianhua's study on Life is A Moment, Wei Jian's study on Lu Xun's essay, Tan Guilin's holistic study of Lu Xun's works were novel and distinctive.There are ten subjects which mainly focus on study of thought, for example, Lu Xun and Confucius, Lu Xun and Nietzsche, Lu Xun's individualistic consciousness, Lu Xun and Rusia, Lu Xun and the Soviet Union, Lu Xun's belief, Lu Xun and the Buddhism, Lu Xun and Chinese characters'reformation, Lu Xun and the Republic of China (1912—1949),Lu Xun and East Asia and so on.Feng Guanglian, Wang Weidong, Li Dongmu,etc.all presented marvelous works on Lu Xun's study.The following researches could refresh and enlighten us a lot to a certain degree, such as Lu Xun and academic study done by Zhao Jinghua, Lu Xun and art study done by Yang Yi, the study of Lu Xun's research made by Zhang Fugui and Tan Guilin.%2014年鲁迅研究呈现出异彩纷呈、创意不断的局面。吴义勤、周南、张克、张全之、杨义等皆对鲁迅小说发表了极为精彩的看法。钱理群的《野草》研究,杨义、宋剑华的《朝花夕拾》研究,魏建的鲁迅杂文研究,谭桂林的鲁迅作品整体研究,均有其新颖独到之处。思想研究主要集中为十个专题:鲁迅与孔子、鲁迅与尼采、鲁迅的个性意识、鲁迅与俄国、鲁迅与苏联、鲁迅的信仰、鲁迅与佛学、鲁迅与汉字改革、鲁迅与民国、鲁迅与东亚等,冯光廉、汪卫东、李冬木、朱德发、孙郁、李春林、谭桂林、张松、刘东方、文贵良、张中良、韩琛等的文章皆堪称优异之作。赵京华的鲁迅与学术研究,杨义的鲁迅与艺术研究,张福贵、谭桂林的鲁迅研究之研究,皆能予人以新的感受和认识。

  1. Use of recycled plastics in wood plastic composites - a review.

    Science.gov (United States)

    Kazemi Najafi, Saeed

    2013-09-01

    The use of recycled and waste thermoplastics has been recently considered for producing wood plastic composites (WPCs). They have great potential for WPCs manufacturing according to results of some limited researches. This paper presents a detailed review about some essential properties of waste and recycled plastics, important for WPCs production, and of research published on the effect of recycled plastics on the physical and mechanical properties of WPCs.

  2. Photodynamic therapy trials with lutetium texaphyrin (Lu-Tex) in patients with locally recurrent breast cancer

    Science.gov (United States)

    Renschler, Markus F.; Yuen, Alan R.; Panella, Timothy J.; Wieman, Thomas J.; Dougherty, Shona; Esserman, Laura; Panjehpour, Masoud; Taber, Scott W.; Fingar, Victor H.; Lowe, Elizabeth; Engel, Julie S.; Lum, Bert; Woodburn, Kathryn W.; Cheong, Wai-Fung; Miller, Richard A.

    1998-05-01

    Photodynamic therapy (PDT) of locally recurrent breast cancer has been limited to treatment of small lesions because of non- selective necrosis of adjacent normal tissues in the treatment field. Lutetium Texaphyrin (PCI-0123, Lu-Tex) is a photosensitizer with improved tumor localization that is activated by 732 nm light, which can penetrate through larger tumors. We have evaluated Lu-Tex in a Phase I trial and in an ongoing Phase II trial in women with locally recurrent breast cancer with large tumors who have failed radiation therapy. Patients received Lu-Tex intravenously by rapid infusion 3 hours before illumination of cutaneous or subcutaneous lesions. In Phase I, Lu-Tex doses were escalated from 0.6 to 7.2 mg/kg in 7 cohorts. Sixteen patients with locally recurrent breast cancer lesions were treated. Dose limiting toxicities above 5.5 mg/kg were pain in the treatment field during therapy, and dysesthesias in light exposed areas. No necrosis of normal tissues in the treated field was noticed. Responses were observed in 60% of evaluable patients [n equals 15, 27% complete remission (CR), 33% partial remission (PR)], with 63% of lesions responding (n equals 73: 45% CR, 18% PR). In Phase II, 25 patients have been studied to date, receiving two treatments ranging from 1.0 to 3.0 mg/kg at a 21 day interval. Treatment fields up to 480 cm2 in size were treated successfully and activity has been observed. Patients have experienced pain at the treatment site but no tissue necrosis. These studies demonstrate the feasibility of Lu-Tex PDT to large chest wall areas in women who have failed radiation therapy for the treatment of locally recurrent breast cancer. Treatment conditions are currently being optimized in the ongoing Phase II trials.

  3. Autonomous parvovirus LuIII encapsidates equal amounts of plus and minus DNA strands

    Energy Technology Data Exchange (ETDEWEB)

    Bates, R.C.; Snyder, C.E.; Banerjee, P.T.; Mitra, S.

    1984-02-01

    Autonomous parvoviruses are thought to uniquely encapsidate single-stranded DNA of minus polarity. In contrast, the defective adeno-associated viruses separately encapsidate equal amounts of plus and minus DNA strands. The uniqueness of minus strand encapsidation is reexamined for the autonomous parvoviruses. Although it was found that Kilham rat virus and H-1 virus encapsidate varying but small amounts of complementary-strand DNA, it was unexpected to find that LuIII virus encapsidated equal amounts of plus and minus DNA. The extracted LuIII DNA possessed properties of double-stranded replicative-form DNA, including insensitivity to S1 endonuclease, cleavage by restriction enzymes, and conversion to unit-length, single-stranded DNA when electrophoresed under denaturing conditions. However, the inability of this DNA to form single-stranded DNA circles when denatured and then renatured in the presence of formamide and the lack of double-stranded DNA circle formation after treatment with exonuclease III and reannealing shows a lack of sequence homology of the 3' and 5' termini of LuIII DNA, in contrast to adeno-associated virus DNA. Digestion of LuIII double-stranded DNA with EcoRI and HincII and separation of plus and minus DNA strands on composite agarose-acrylamide gels identified a heterogeneity present only in the plus DNA strand. These results suggest that strand specificity of viral DNA encapsidation is not a useful property for differentiation between the autonomous and defective parvoviruses. Furthermore, encapsidation by LuIII of equal amounts of complementary DNA strands in contrast to encapsidation of minus strands by H-1 virus, when propagated in the same host cell type, suggests that selection of strands for encapsidation is a virus-coded rather than host-controlled event.

  4. Structural, microstructural and vibrational analyses of the monoclinic tungstate BiLuWO{sub 6}

    Energy Technology Data Exchange (ETDEWEB)

    Ait Ahsaine, H. [Laboratoire Matériaux et Environnement LME, Faculté des Sciences, Université Ibn Zohr, BP 8106 Cité Dakhla, Agadir (Morocco); Taoufyq, A. [Laboratoire Matériaux et Environnement LME, Faculté des Sciences, Université Ibn Zohr, BP 8106 Cité Dakhla, Agadir (Morocco); Institut Matériaux Microélectronique et Nanosciences de Provence, IM2NP, UMR CNRS 7334, Université de Toulon, BP 20132, 83957 La Garde Cedex (France); Patout, L. [Institut Matériaux Microélectronique et Nanosciences de Provence, IM2NP, UMR CNRS 7334, Université de Toulon, BP 20132, 83957 La Garde Cedex (France); Ezahri, M.; Benlhachemi, A.; Bakiz, B. [Laboratoire Matériaux et Environnement LME, Faculté des Sciences, Université Ibn Zohr, BP 8106 Cité Dakhla, Agadir (Morocco); Villain, S.; Guinneton, F. [Institut Matériaux Microélectronique et Nanosciences de Provence, IM2NP, UMR CNRS 7334, Université de Toulon, BP 20132, 83957 La Garde Cedex (France); Gavarri, J.-R., E-mail: gavarri.jr@univ-tln.fr [Institut Matériaux Microélectronique et Nanosciences de Provence, IM2NP, UMR CNRS 7334, Université de Toulon, BP 20132, 83957 La Garde Cedex (France)

    2014-10-15

    The bismuth lutetium tungstate phase BiLuWO{sub 6} has been prepared using a solid state route with stoichiometric mixtures of oxide precursors. The obtained polycrystalline phase has been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Raman spectroscopy. In the first step, the crystal structure has been refined using Rietveld method: the crystal cell was resolved using monoclinic system (parameters a, b, c, β) with space group A2/m. SEM images showed the presence of large crystallites with a constant local nominal composition (BiLuW). TEM analyses showed that the actual local structure could be better represented by a superlattice (a, 2b, c, β) associated with space groups P2 or P2/m. The Raman spectroscopy showed the presence of vibrational bands similar to those observed in the compounds BiREWO{sub 6} with RE=Y, Gd, Nd. However, these vibrational bands were characterized by large full width at half maximum, probably resulting from the long range Bi/Lu disorder and local WO{sub 6} octahedron distortions in the structure. - Graphical abstract: The average structure of BiLuWO{sub 6} determined from X-ray diffraction data can be represented by A2/m space group. Experimental Electron Diffraction patterns along the [0vw] zone axes of the monoclinic structure and associated simulated patterns show the existence of a monoclinic superstructure with space group P2 or P2/m. - Highlights: • A new monoclinic BiLuWO{sub 6} phase has been elaborated from solid-state reaction. • The space group of the monoclinic disordered average structure should be A2/m. • Transmission electron microscopy leads to a superlattice with P2/m space group. • Raman spectroscopy suggests existence of local disorder.

  5. Direct liquefaction of plastics and coprocessing of coal with plastics

    Energy Technology Data Exchange (ETDEWEB)

    Huffman, G.P.; Feng, Z.; Mahajan, V. [Univ. of Kentucky, Lexington, KY (United States)

    1995-12-31

    The objectives of this work were to optimize reaction conditions for the direct liquefaction of waste plastics and the coprocessing of coal with waste plastics. In previous work, the direct liquefaction of medium and high density polyethylene (PE), polypropylene (PPE), poly(ethylene terephthalate) (PET), and a mixed plastic waste, and the coliquefaction of these plastics with coals of three different ranks was studied. The results established that a solid acid catalyst (HZSM-5 zeolite) was highly active for the liquefaction of the plastics alone, typically giving oil yields of 80-95% and total conversions of 90-100% at temperatures of 430-450 {degrees}C. In the coliquefaction experiments, 50:50 mixtures of plastic and coal were used with a tetralin solvent (tetralin:solid = 3:2). Using approximately 1% of the HZSM-5 catalyst and a nanoscale iron catalyst, oil yields of 50-70% and total conversion of 80-90% were typical. In the current year, further investigations were conducted of the liquefaction of PE, PPE, and a commingled waste plastic obtained from the American Plastics Council (APC), and the coprocessing of PE, PPE and the APC plastic with Black Thunder subbituminous coal. Several different catalysts were used in these studies.

  6. Plastic Surgery and Suicide: A Clinical Guide for Plastic Surgeons.

    Science.gov (United States)

    Reddy, Vikram; Coffey, M Justin

    2016-08-01

    Several studies have identified an increased risk of suicide among patient populations which a plastic surgeon may have a high risk of encountering: women undergoing breast augmentation, cosmetic surgery patients, and breast cancer patients. No formal guidelines exist to assist a plastic surgeon when faced with such a patient, and not every plastic surgery team has mental health clinicians that are readily accessible for consultation or referral. The goal of this clinical guide is to offer plastic surgeons a set of practical approaches to manage potentially suicidal patients. In addition, the authors review a screening tool, which can assist surgeons when encountering high-risk patients.

  7. Unified characteristics line theory of spacial axisymmetric plastic problem

    Institute of Scientific and Technical Information of China (English)

    YU; Maohong; (

    2001-01-01

    Karman, Th., Zur theorie der spanungszustnde in plastischen und sandartigen medion, Nachr. Gesellsch. Wissensch., Gttingen, 1909.[17]Szczepinski, W., Introduction to the Mechanics of Plastic Forming of Metals, Netherlands: Sijthoff and Noordhoff, 1979.[18]Chen, W. F., Limit Analysis and Soil Plasticity, New York: Elsevier, 1975.[19]Yu, M. H., He, L. N., A new model and theory on yield and failure of materials under complex stress state, Mechanical Behaviors of Materials~6, Oxford: Pergamon Press, 1991, 3: 841—846.[20]Yu, M. H., New System of Strength Theory (in Chinese), Xi'an: Xi'an Jiaotong Universitry Press, 1992.[21]Yu, M. H., He, L. N., Song, L. Y., Twin shear stress theory and its generalization, Scientia Sinica (Science in China), Series A, 1985, 28(11): 1174—1183.[22]Yu, M. H., Yang, S. Y. et al., Unified elasto-plastic associated and non-associated constitutive model and its engineering applications, Computers and Structures, 1999, 71: 627—636.[23]Ma, G. W., Shoji, I., Plastic limit analysis of circular plates with respect to unified yield criterion, Int. J. Mech. Sci., 1998, 40(10): 963.[24]Ma, G. W., Hao, H., Unified plastic limit analyses of circular plates under arbitrary load, Journal of Applied Mechanics, ASME, 1999, 66(2): 568.[25]Qiang, H. F., Lu, N., Liu, B. J., Unified solutions of crack tip plastic zone under small scale yielding, Chinese Journal of Mechanical Engineering, (in Chinese with English abstract), 1999, 35(1): 34—38.[26]Yang, S. Y., Yu, M. H., Constitutive descriptions of multiphase poropus media, Acta Mechanica Sinica (in Chinese with English abstract), 2000, 32(1):11—24.[27]Yang, S. Y., Yu, M. H., An elasto-plastic damage model for saturated and unsaturated geomaterials, Acta Mechanica Sinica (in Chinese with English abstract), 2000, 32(2): 198—206.[28]Cheng, H. X., Li, J. J., Zhang, G. S. et al., Finite element analysis program system HAJIF(X), Chinese Journal of

  8. Tree plastic bark

    OpenAIRE

    Casado Arroyo, Carlos

    2016-01-01

    “Tree plastic bark" consiste en la realización de una intervención artística en un entorno natural concreto, generando de esta manera un Site Specific(1). Como hace alusión Rosalind Krauss en sus reflexiones “La escultura en el campo expandido”(2), comenta que su origen esta claramente ligado con el concepto de monumentalidad. La escultura es un monumento, se crea para conmemorar algún hecho o personaje relevante y está realizada para una ubicación concreta. La investigación parte de la id...

  9. Fabrication of plastic biochips

    Energy Technology Data Exchange (ETDEWEB)

    Saaem, Ishtiaq; Ma, Kuo-Sheng; Alam, S. Munir; Tian Jingdong [Department of Biomedical Engineering and Institute for Genome Sciences and Policy, Duke University, Durham, North Carolina 27708 (United States); Department of Medicine and Human Vaccine Institute, Duke University, Durham, North Carolina 27708 (United States); Department of Biomedical Engineering and Institute for Genome Sciences and Policy, Duke University, Durham, North Carolina 27708 (United States)

    2010-07-15

    A versatile surface functionalization procedure based on rf magnetron sputtering of silica was performed on poly(methylmethacrylate), polycarbonate, polypropylene, and cyclic olefin copolymers (Topas 6015). The hybrid thermoplastic surfaces were characterized by x-ray photoelectron spectrometer analysis and contact angle measurements. The authors then used these hybrid materials to perform a sandwich assay targeting an HIV-1 antibody using fluorescent detection and biotinylated peptides immobilized using the bioaffinity of biotin-neutravidin. They found a limit of detection similar to arrays on glass surfaces and believed that this plastic biochip platform may be used for the development of disposable immunosensing and diagnostic applications.

  10. Magnetic transition anisotropies in orthorhombic LuMnO3 and HoMnO3 multiferroic thin films

    Science.gov (United States)

    Tsai, T. Y.; Lin, T. H.; Slowry, S.; Luo, C. W.; Wu, K. H.; Lin, J.-Y.; Uen, T. M.; Juang, J. Y.

    2010-01-01

    We have successfully prepared the b-axis-oriented orthorhombic LuMnO3 (LuMO) and HoMnO3 (HMO) thin films by pulsed laser deposition on (110)-LaAlO3 substrates. The nearly perfect alignment between the film growth orientation and the substrate allows us to study the magnetic transitions along the respective crystal orientation, which has displayed marked anisotropic behaviours. In particular, with the largest ionic size difference between Lu and Ho for the family of RMnO3 displaying the E-type AFM, the effects of lattice distortion on the magnetic transition are compared.

  11. Plastic food packaging and health

    Directory of Open Access Journals (Sweden)

    Raika Durusoy

    2011-02-01

    Full Text Available Plastics have a wide usage in our daily lives. One of their uses is for food packaging and food containers. The aim of this review is to introduce different types of chemicals that can leach from food packaging plastics into foods and cause human exposure and to mention their effects on health. The types of plastics were reviewed under the 13 headings in Turkish Codex Alimentarius and plastics recycling symbols were provided to enable the recognition of the type of plastic when applicable. Chemicals used during the production and that can cause health risks are investigated under the heading of the relevant type of plastic. The most important chemicals from plastic food packaging that can cause toxicity are styrene, 1,3-butadiene, melamine, formaldehyde, acrylamide, di-2-ethylhexyl phthalate, di-2-ethylhexyl adipate, vinyl chloride and bisphenol A. These chemicals have endocrine disrupting, carcinogenic and/or development disrupting effects. These chemicals may leach into foods depending on the chemical properties of the plastic or food, temperature during packaging, processing and storage, exposure to UV and duration of storage. Contact with fatty/oily or acidic foods, heating of the food inside the container, or drinking hot drinks from plastic cups, use of old and scratched plastics and some detergents increase the risk of leaching. The use of plastic containers and packaging for food and beveradges should be avoided whenever possible and when necessary, less harmful types of plastic should be preferred. [TAF Prev Med Bull 2011; 10(1.000: 87-96

  12. The commercialization of plastic surgery.

    Science.gov (United States)

    Swanson, Eric

    2013-09-01

    The last decade has brought a major challenge to the traditional practice of plastic surgery from corporations that treat plastic surgery as a commercial product and market directly to the public. This corporate medicine model may include promotion of a trademarked procedure or device, national advertising that promises stunning results, sales consultants, and claims of innovation, superiority, and improved safety. This article explores the ethics of this business practice and whether corporate medicine is a desirable model for patients and plastic surgeons.

  13. Zile Elbaşoğlu Camii’nin Sıvalar Altında Kalan Gizemi The Mystery Of The Zile-Elbaşoğlu Mosque Remains Under Plasters

    Directory of Open Access Journals (Sweden)

    Ali Murat AKTEMUR

    2013-09-01

    Full Text Available Elbaşoğlu Mosque was built in 1801 by Ahmet Aga, clean-cutstone architecture, square, rectangular with remarkable inscriptionsElbaşoğlu Mosque is one of the local mosque, wood-backed and woodenceilings. Until 2007, the walls and the ceiling, and even the altar,wooden support, wood columns, wooden gallery, galleries, in short, allthe wooden elements of the mosque was covered with oil on sweet-limeplaster. In 2007, during the repair of the roof of a simple chance, withplaster falling due to the flowing water under the pen-and-repair workon the emergence of ornaments and wooden decorations samples, thenstopped cleaning and scraper operations in the administration of theGeneral Directorate of Foundations in the interior of the mosque penrichsamples of work, with examples of wooden decorative plaster underthe mystery was revealed.Cover at the top of the walls combined with Harim calligraphy ona black background with spots, including a concave border of the beltframed verse was written. Verse generation raised on the corners of theceiling moldings created crash of beads, triangle, octagon in the middleof a field, and thus created the split surfaces. Located in the middle ofthe octagon octagon-shaped belly, finished with carving technique,baroque decorated with floral motifs. the four corners of the triangularroof panels are decorated with reliefs excess plastic plant. Pen-workdecoration floral motifs on the walls, gallery, pulpits, pillars, such asthe carved wooden elements fall floral and geometric motifs are carvedin the mosque offers a wealth of eye-catching as almost free space left.Made in 1801, in the early years of the Republic, the region'sunique sweet-lime paint on plaster taken off this rich decoration, woodart and pen-work ornamentation Turkey offers one of the richest. Tokat Zile’de Elbaşoğlu Ahmet Ağa tarafından 1801 yılında inşa ettirilen, düzgün kesme taş mimarisi, kitabeleri ile dikkat çeken, kareye yakın dikd

  14. 2010年鲁迅研究综述%A Summary of Studies of Lu Xun in 2010

    Institute of Scientific and Technical Information of China (English)

    崔云伟; 刘增人

    2011-01-01

    2010 saw a steady momentum in the field of research on Lu Xun. Fujii Shoz, Li Jin, Feng Guanglian and other scholars came up with very important viewpoints about Lu Xun' s fiction. The study of Wild Grass reached a new height, represented by a paper by Wang Weidong. Many original papers were published about Lu Xun' s essays. The study of his ideology is focused on the following topics: Lu Xun and contemporary China, Lu Xun and the Left-Wing Federation, Lu Xun and Enlightenment, Lu Xun and the May 4 Movement, Lu Xun and Realism, Lu Xun and radicalism, Lu Xun and Chinese and foreign culture, Lu Xun and existentialism, Lu Xun' s images of animals, studies of the reception of Lu Xun. There was also tremendous progress in research into Lu Xun' s life, the teaching of Lu Xun, Lu Xun' s viewpoints of fine arts, and the study of Lu Xun studies.%2010年鲁迅研究依然保持了持续发展的势头,在平淡从容中出现了诸多热点和亮点。藤井省三、李今、冯光廉皆对鲁迅小说发表了极为精彩的看法。《野草》研究又出现了一个新的高潮,汪卫东的文章堪称力作。鲁迅杂文研究收获颇丰,陈方竞、黄健、陈迪强、王学谦的阐释皆有其新颖独到之处。思想研究主要集中为十个专题:鲁迅与当代中国、鲁迅与左联、鲁迅与启蒙、鲁迅与五四、鲁迅与现实主义、鲁迅与激进主义、鲁迅与中外文化、鲁迅与存在主义、鲁迅笔下的动物意象、鲁迅的接受研究等,李新宇、阎真、杨义、王锡荣、刘家呜、王晓初、姜振昌、吕周聚、陈汉萍、吴康、靳新来、钱理群等的文章(专著)皆堪称优异之作。鲁迅生平和传记写作研究以周楠本、冯光廉的文章最为突出,且出现了一大批初版和再版的鲁迅传。鲁迅教学研究中张梦阳、冯光廉的论述最为引人注目。赵延年、崔云伟的鲁迅与美术研究,王富仁、贺仲明的鲁迅研究之研究皆能使人耳目一新。

  15. 2015年鲁迅研究述评%The Review on Lu Xun’s Research in 2015

    Institute of Scientific and Technical Information of China (English)

    崔云伟

    2016-01-01

    2015年鲁迅研究依然保持了持续发展的势头,在平淡从容中出现了诸多热点和亮点。宋剑华、勒新来、刘春勇、高旭东等皆对鲁迅小说发表了极为精彩的看法。汪卫东、彭小燕、朱崇科的《野草》研究均可称得上别具一格。张克、刘春勇的鲁迅杂文研究,文贵良、路杨的鲁迅整体研究皆有其新颖独到之处。思想研究主要集中为十个专题:鲁迅与五四、鲁迅的精神信仰、鲁迅的精神特质、鲁迅的当代性、鲁迅与革命、鲁迅与政治、鲁迅与中国传统文化、鲁迅与外国文化、鲁迅与东亚、鲁迅与自由主义等,郜元宝、汪卫东、谭桂林、杨义、李春林、王得后、李玮、孙郁、赵京华、张松等的文章皆堪称优异之作。李冬木、潘世圣、张钊贻的史料研究,傅承洲、刘克敌、刘东方的鲁迅与学术研究,皆能予人以新的感受和认识。%In 2015, the research on Lu Xun remained continuous. There were many remarkable works among these researches. Great views on Lu Xun’s novels were made by Song Jianhua, Jin Xinlai and Liu Chunyong, etc. The study on Wild Weeds made by Wang Weidong, Peng Xiaoyan and Zhu Chongke was unique. Zhang ke and Liu Chunyong’s study on Lu Xun’s essay and Wen Guil-iang, Lu Yang’s holistic study on Lu Xun have original ideas. Study on thoughts mainly focused on the following ten aspects: Lu Xun and May Fourth, Lu Xun’s spiritual belief, Lu Xun’s spiritual characteristic, Lu Xun’s contemporariness, Lu Xun and Revolution, Lu Xun and Politics, Lu Xun and Chinese Traditional Culture, Lu Xun and Foreign Culture, Lu Xun and East Asia, Lu Xun and Liberal-ism. The articles written by Gao Yuanbao, Wang Weidong, Tan Guilin, Yang Yi, Li Chunlin, Wang Dehou, Li Wei, Sun Yu, Zhao Jinghua and Zhang Song, etc, were considered to be outstanding. Both the study on historical material made by Li Dongmu, Pan Shish-eng and Zhang Zhaoyi and the

  16. Multiscale modeling and synaptic plasticity.

    Science.gov (United States)

    Bhalla, Upinder S

    2014-01-01

    Synaptic plasticity is a major convergence point for theory and computation, and the process of plasticity engages physiology, cell, and molecular biology. In its many manifestations, plasticity is at the hub of basic neuroscience questions about memory and development, as well as more medically themed questions of neural damage and recovery. As an important cellular locus of memory, synaptic plasticity has received a huge amount of experimental and theoretical attention. If computational models have tended to pick specific aspects of plasticity, such as STDP, and reduce them to an equation, some experimental studies are equally guilty of oversimplification each time they identify a new molecule and declare it to be the last word in plasticity and learning. Multiscale modeling begins with the acknowledgment that synaptic function spans many levels of signaling, and these are so tightly coupled that we risk losing essential features of plasticity if we focus exclusively on any one level. Despite the technical challenges and gaps in data for model specification, an increasing number of multiscale modeling studies have taken on key questions in plasticity. These have provided new insights, but importantly, they have opened new avenues for questioning. This review discusses a wide range of multiscale models in plasticity, including their technical landscape and their implications.

  17. Plastics recycling: challenges and opportunities

    National Research Council Canada - National Science Library

    Jefferson Hopewell; Robert Dvorak; Edward Kosior

    2009-01-01

    .... Advances in technologies and systems for the collection, sorting and reprocessing of recyclable plastics are creating new opportunities for recycling, and with the combined actions of the public...

  18. Americium behaviour in plastic vessels

    Energy Technology Data Exchange (ETDEWEB)

    Legarda, F.; Herranz, M. [Departamento de Ingenieria Nuclear y Mecanica de Fluidos, Escuela Tecnica Superior de Ingenieria de Bilbao, Universidad del Pais Vasco (UPV/EHU), Alameda de Urquijo s/n, 48013 Bilbao (Spain); Idoeta, R., E-mail: raquel.idoeta@ehu.e [Departamento de Ingenieria Nuclear y Mecanica de Fluidos, Escuela Tecnica Superior de Ingenieria de Bilbao, Universidad del Pais Vasco (UPV/EHU), Alameda de Urquijo s/n, 48013 Bilbao (Spain); Abelairas, A. [Departamento de Ingenieria Nuclear y Mecanica de Fluidos, Escuela Tecnica Superior de Ingenieria de Bilbao, Universidad del Pais Vasco (UPV/EHU), Alameda de Urquijo s/n, 48013 Bilbao (Spain)

    2010-07-15

    The adsorption of {sup 241}Am dissolved in water in different plastic storage vessels was determined. Three different plastics were investigated with natural and distilled waters and the retention of {sup 241}Am by these plastics was studied. The same was done by varying vessel agitation time, vessel agitation speed, surface/volume ratio of water in the vessels and water pH. Adsorptions were measured to be between 0% and 70%. The adsorption of {sup 241}Am is minimized with no water agitation, with PET or PVC plastics, and by water acidification.

  19. [Erythropoietin in plastic surgery].

    Science.gov (United States)

    Günter, C I; Rezaeian, F; Harder, Y; Lohmeyer, J A; Egert, S; Bader, A; Schilling, A F; Machens, H-G

    2013-04-01

    EPO is an autologous hormone, which is known to regulate erythropoiesis. For 30 years it has been used for the therapy of diverse forms of anaemia, such as renal anaemia, tumour-related anaemias, etc. Meanwhile, a multitude of scientific publications were able to demonstrate its pro-regenerative effects after trauma. These include short-term effects such as the inhibition of the "primary injury response" or apoptosis, and mid- and long-term effects for example the stimulation of stem cell recruitment, growth factor production, angiogenesis and re-epithelialisation. Known adverse reactions are increases of thromboembolic events and blood pressure, as well as a higher mortality in patients with tumour anaemias treated with EPO. Scientific investigations of EPO in the field of plastic surgery included: free and local flaps, nerve regeneration, wound healing enhancement after dermal thermal injuries and in chronic wounds.Acute evidence for the clinical use of EPO in the field of plastic surgery is still not satisfactory, due to the insufficient number of Good Clinical Practice (GCP)-conform clinical trials. Thus, the initiation of more scientifically sound trials is indicated.

  20. Optogenetics and synaptic plasticity.

    Science.gov (United States)

    Xie, Yu-feng; Jackson, Michael F; Macdonald, John F

    2013-11-01

    The intricate and complex interaction between different populations of neurons in the brain has imposed limits on our ability to gain detailed understanding of synaptic transmission and its integration when employing classical electrophysiological approaches. Indeed, electrical field stimulation delivered via traditional microelectrodes does not permit the targeted, precise and selective control of neuronal activity amongst a varied population of neurons and their inputs (eg, cholinergic, dopaminergic or glutamatergic neurons). Recently established optogenetic techniques overcome these limitations allowing precise control of the target neuron populations, which is essential for the elucidation of the neural substrates underlying complex animal behaviors. Indeed, by introducing light-activated channels (ie, microbial opsin genes) into specific neuronal populations, optogenetics enables non-invasive optical control of specific neurons with milliseconds precision. These approaches can readily be applied to freely behaving live animals. Recently there is increased interests in utilizing optogenetics tools to understand synaptic plasticity and learning/memory. Here, we summarize recent progress in applying optogenetics in in the study of synaptic plasticity.

  1. 放牧对内蒙古锡林河流域草地群落植物茎叶生物量资源分配的影响%EFFECTS OF GRAZING ON FOLIAGE BIOMASS ALLOCATION OF GRASS-LAND COMMUNITIES IN XILIN RIVER BASIN, INNER MONGOLIA

    Institute of Scientific and Technical Information of China (English)

    任海彦; 郑淑霞; 白永飞

    2009-01-01

    以内蒙古锡林河流域沿水分梯度分布的灰脉苔草(Carex appendiculata)、贝加尔针茅(Stipa baicalensis)、羊草(Leymus chinesis)、大针茅(stipa grandis)、小叶锦鸡儿(Caragana microphylla)和冷蒿(Artemisia frigida)6个草地群落为对象,研究了围封禁牧与放牧样地中144个共有植物种的高度、丛幅面积、茎、叶和株(丛)生物量、茎叶比等性状.结果表明:1)在个体水平上,放牧样地中植物的生殖枝高度、营养枝高度、丛幅面积、单株(丛)生物量、茎、叶生物量和茎叶比均显著低于围封禁牧样地,植物在放牧干扰下表现出明显的小型化现象;2)在群落水平上,放牧亦显著降低了群落总生物量和茎、叶生物量;3)过度放牧显著改变了物种的资源分配策略,使生物量向叶的分配比例增加,向茎的分配比例减少.资源优先向同化器官分配可能是植物对长期放牧干扰的一种重要适应对策;4)轻度放牧对物种的资源分配没有显著影响,单株(从)生物量和群落茎、叶及总生物量均表现出增加趋势,这与过度放牧的影响正好相反.过度放牧引起的植物个体小型化改变了生态系统中物种的资源分配策略,进而对生态系统功能产生重要的影响.%Aims Our objective is to determine whether 1) characteristics of gazing-induced individual miniaturization differ among plant species and across grassland communities, 2) miniaturized plants have detectable changes in resource allocation, and 3) grazing-induced changes in plant resource allocation affect ecosystem functioning at the plant community level.Methods Resource allocation of 144 common species from grassland communities, i.e. Carex appendiculata meadow, Stipa baicalensis meadow steppe, Leymus chinensis typical steppe, Stipa grandis typical steppe, Caragana microphylla typical steppe, and Artemisia frigida typical steppe, were investigated along a soil moisture gradient in the Xilin River Basin

  2. Effective lattice stabilization of gadolinium aluminate garnet (GdAG) via Lu3+ doping and development of highly efficient (Gd,Lu)AG:Eu3+ red phosphors

    OpenAIRE

    Jinkai Li, Ji-Guang Li, Zhongjie Zhang, Xiaoli Wu, Shaohong Liu, Xiaodong Li, Xudong Sun and Yoshio Sakka

    2012-01-01

    The metastable garnet lattice of Gd3Al5O12 is stabilized by doping with smaller Lu3+, which then allows an effective incorporation of larger Eu3+ activators. The [(Gd1−xLux)1−yEuy]3Al5O12 (x = 0.1–0.5, y = 0.01–0.09) garnet solid solutions, calcined from their precursors synthesized via carbonate coprecipitation, exhibit strong luminescence at 591 nm (the 5D0 → 7F1 magnetic dipole transition of Eu3+) upon UV excitation into the charge transfer band (CTB) at ∼239 nm, with CIE chromaticity coor...

  3. Sustainable reverse logistics for household plastic waste

    NARCIS (Netherlands)

    Bing, X.

    2014-01-01

    Summary of the thesis titled “Sustainable Reverse Logistics for Household Plastic Waste” PhD Candidate: Xiaoyun Bing Recycled plastic can be used in the manufacturing of plastic products to reduce the use of virgin plastics material. The cost of recycled plastics is usually lower than th

  4. Sustainable reverse logistics for household plastic waste

    NARCIS (Netherlands)

    Bing, X.

    2014-01-01

    Summary of the thesis titled “Sustainable Reverse Logistics for Household Plastic Waste” PhD Candidate: Xiaoyun Bing Recycled plastic can be used in the manufacturing of plastic products to reduce the use of virgin plastics material. The cost of recycled plastics is usually lower than

  5. Sustainable reverse logistics for household plastic waste

    NARCIS (Netherlands)

    Bing, X.

    2014-01-01

    Summary of the thesis titled “Sustainable Reverse Logistics for Household Plastic Waste” PhD Candidate: Xiaoyun Bing Recycled plastic can be used in the manufacturing of plastic products to reduce the use of virgin plastics material. The cost of recycled plastics is usually lower than th

  6. Plastics recycling: challenges and opportunities.

    Science.gov (United States)

    Hopewell, Jefferson; Dvorak, Robert; Kosior, Edward

    2009-07-27

    Plastics are inexpensive, lightweight and durable materials, which can readily be moulded into a variety of products that find use in a wide range of applications. As a consequence, the production of plastics has increased markedly over the last 60 years. However, current levels of their usage and disposal generate several environmental problems. Around 4 per cent of world oil and gas production, a non-renewable resource, is used as feedstock for plastics and a further 3-4% is expended to provide energy for their manufacture. A major portion of plastic produced each year is used to make disposable items of packaging or other short-lived products that are discarded within a year of manufacture. These two observations alone indicate that our current use of plastics is not sustainable. In addition, because of the durability of the polymers involved, substantial quantities of discarded end-of-life plastics are accumulating as debris in landfills and in natural habitats worldwide. Recycling is one of the most important actions currently available to reduce these impacts and represents one of the most dynamic areas in the plastics industry today. Recycling provides opportunities to reduce oil usage, carbon dioxide emissions and the quantities of waste requiring disposal. Here, we briefly set recycling into context against other waste-reduction strategies, namely reduction in material use through downgauging or product reuse, the use of alternative biodegradable materials and energy recovery as fuel. While plastics have been recycled since the 1970s, the quantities that are recycled vary geographically, according to plastic type and application. Recycling of packaging materials has seen rapid expansion over the last decades in a number of countries. Advances in technologies and systems for the collection, sorting and reprocessing of recyclable plastics are creating new opportunities for recycling, and with the combined actions of the public, industry and governments it

  7. Plastics recycling: challenges and opportunities

    Science.gov (United States)

    Hopewell, Jefferson; Dvorak, Robert; Kosior, Edward

    2009-01-01

    Plastics are inexpensive, lightweight and durable materials, which can readily be moulded into a variety of products that find use in a wide range of applications. As a consequence, the production of plastics has increased markedly over the last 60 years. However, current levels of their usage and disposal generate several environmental problems. Around 4 per cent of world oil and gas production, a non-renewable resource, is used as feedstock for plastics and a further 3–4% is expended to provide energy for their manufacture. A major portion of plastic produced each year is used to make disposable items of packaging or other short-lived products that are discarded within a year of manufacture. These two observations alone indicate that our current use of plastics is not sustainable. In addition, because of the durability of the polymers involved, substantial quantities of discarded end-of-life plastics are accumulating as debris in landfills and in natural habitats worldwide. Recycling is one of the most important actions currently available to reduce these impacts and represents one of the most dynamic areas in the plastics industry today. Recycling provides opportunities to reduce oil usage, carbon dioxide emissions and the quantities of waste requiring disposal. Here, we briefly set recycling into context against other waste-reduction strategies, namely reduction in material use through downgauging or product reuse, the use of alternative biodegradable materials and energy recovery as fuel. While plastics have been recycled since the 1970s, the quantities that are recycled vary geographically, according to plastic type and application. Recycling of packaging materials has seen rapid expansion over the last decades in a number of countries. Advances in technologies and systems for the collection, sorting and reprocessing of recyclable plastics are creating new opportunities for recycling, and with the combined actions of the public, industry and governments it

  8. Plastic in North Sea Fish

    NARCIS (Netherlands)

    Foekema, E.M.; Gruijter, de C.; Mergia, M.T.; Franeker, van J.A.; Murk, A.J.; Koelmans, A.A.

    2013-01-01

    To quantify the occurrence of ingested plastic in fish species caught at different geographical positions in the North Sea, and to test whether the fish condition is affected by ingestion of plastics, 1203 individual fish of seven common North Sea species were investigated: herring, gray gurnard, wh

  9. The scope of plastic surgery

    African Journals Online (AJOL)

    2013-08-03

    Aug 3, 2013 ... areas of surgery (especially general surgery), plastic surgeons are arguably the .... Who do you feel are experts in laparoscopic surgery? e (general surgeons) a. Maxillofacial .... of pressure sore. ORIF = open reduction internal fixation. ... Plastic versus cosmetic surgery: What's the difference? Plast Reconstr.

  10. New Life for Old Plastics

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    Recycling joint venture utilizes innovative technology to reuse plastics Recycling,despite its green connotations,can be a messy business.In China,more than 400,000 companies are engaged in plastic recycling,but 70 percent of them are family enterprises,

  11. Computational strain gradient crystal plasticity

    DEFF Research Database (Denmark)

    Niordson, Christian Frithiof; Kysar, Jeffrey W.

    2014-01-01

    of plane crystal plasticity are studied: pure shear of a single crystal between rigid platens as well as plastic deformation around cylindrical voids in hexagonal close packed and face centered cubic crystals. Effective in-plane constitutive slip parameters for plane strain deformation of specifically...

  12. Architecture of European Plastic Surgery

    NARCIS (Netherlands)

    Nicolai, J. -P. A.; Banic, A.; Molea, G.; Mazzola, R.; Poell, J. G.

    2006-01-01

    The architecture of European Plastic Surgery was published in 1996 [Nicolai JPA, Scuderi N. Plastic surgical Europe in an organogram. Eur J Plast Surg 1996; 19: 253-6.] It is the objective of this paper to update information of that article. Continuing medical education (CME), science, training,

  13. Plastics for corrosion inhibition

    CERN Document Server

    Goldade, Victor A; Makarevich, Anna V; Kestelman, Vladimir N

    2005-01-01

    The development of polymer composites containing inhibitors of metal corrosion is an important endeavour in modern materials science and technology. Corrosion inhibitors can be located in a polymer matrix in the solid, liquid or gaseous phase. This book details the thermodynamic principles for selecting these components, their compatibility and their effectiveness. The various mechanisms of metal protection – barrier, inhibiting and electromechanical – are considered, as are the conflicting requirements placed on the structure of the combined material. Two main classes of inhibited materials (structural and films/coatings) are described in detail. Examples are given of structural plastics used in friction units subjected to mechano-chemical wear and of polymer films/coatings for protecting metal objects against corrosion.

  14. Universal features of amorphous plasticity

    Science.gov (United States)

    Budrikis, Zoe; Castellanos, David Fernandez; Sandfeld, Stefan; Zaiser, Michael; Zapperi, Stefano

    2017-07-01

    Plastic yielding of amorphous solids occurs by power-law distributed deformation avalanches whose universality is still debated. Experiments and molecular dynamics simulations are hampered by limited statistical samples, and although existing stochastic models give precise exponents, they require strong assumptions about fixed deformation directions, at odds with the statistical isotropy of amorphous materials. Here, we introduce a fully tensorial, stochastic mesoscale model for amorphous plasticity that links the statistical physics of plastic yielding to engineering mechanics. It captures the complex shear patterning observed for a wide variety of deformation modes, as well as the avalanche dynamics of plastic flow. Avalanches are described by universal size exponents and scaling functions, avalanche shapes, and local stability distributions, independent of system dimensionality, boundary and loading conditions, and stress state. Our predictions consistently differ from those of mean-field depinning models, providing evidence that plastic yielding is a distinct type of critical phenomenon.

  15. Phenotypic Plasticity and Species Coexistence.

    Science.gov (United States)

    Turcotte, Martin M; Levine, Jonathan M

    2016-10-01

    Ecologists are increasingly interested in predicting how intraspecific variation and changing trait values impact species interactions and community composition. For many traits, much of this variation is caused by phenotypic plasticity, and thus the impact of plasticity on species coexistence deserves robust quantification. Partly due to a lack of sound theoretical expectations, empirical studies make contradictory claims regarding plasticity effects on coexistence. Our critical review of this literature, framed in modern coexistence theory, reveals that plasticity affects species interactions in ways that could impact stabilizing niche differences and competitive asymmetries. However, almost no study integrates these measures to quantify the net effect of plasticity on species coexistence. To address this challenge, we outline novel empirical approaches grounded in modern theory.

  16. Imaging brain plasticity after trauma

    Institute of Scientific and Technical Information of China (English)

    Zhifeng Kou; Armin Iraji

    2014-01-01

    The brain is highly plastic after stroke or epilepsy;however, there is a paucity of brain plasticity investigation after traumatic brain injury (TBI). This mini review summarizes the most recent evidence of brain plasticity in human TBI patients from the perspective of advanced magnetic resonance imaging. Similar to other forms of acquired brain injury, TBI patients also demonstrat-ed both structural reorganization as well as functional compensation by the recruitment of other brain regions. However, the large scale brain network alterations after TBI are still unknown, and the ifeld is still short of proper means on how to guide the choice of TBI rehabilitation or treat-ment plan to promote brain plasticity. The authors also point out the new direction of brain plas-ticity investigation.

  17. Size effects in crystal plasticity

    DEFF Research Database (Denmark)

    Borg, Ulrik

    2007-01-01

    Numerical analyses of plasticity size effects have been carried out for different problems using a developed strain gradient crystal plasticiy theory. The theory employs higher order stresses as work conjugates to slip gradients and uses higher order boundary conditions. Problems on localization...... of plastic flow in a single crystal, grain boundary effects in a bicrystal, and grain size effects in a polycrystal are studied. Single crystals containing micro-scale voids have also been analyzed at different loading conditions with focus on the stress and deformation fields around the voids, on void...... growth and interaction between neighboring voids, and on a comparison between the developed strain gradient crystal plasticity theory and a discrete dislocation plasticity theory. Furthermore, voids and rigid inclusions in isotropic materials have been studied using a strain gradient plasticity theory...

  18. Analysis of heat capacity and Mössbauer data for LuZnSn2 compound

    Directory of Open Access Journals (Sweden)

    Łątka Kazimierz

    2015-03-01

    Full Text Available New analysis of heat capacity data is presented for LuZnSn2 compound that takes into account anharmonic effects together with the existence of Einstein modes. 119mSn Mössbauer spectroscopy was used to monitor the hyperfine parameters at the two crystallographically inequivalent Sn sites in the studied compound. The problem of non-unique mathematical resonance spectrum description and the problem how to choose physically meaningful set of hyperfine parameters will be thoroughly discussed. Measured quadrupole interaction constants by 119mSn Mössbauer spectroscopy give estimations for Vzz component of electric field gradient tensor at both Sn sites in LuZnSn2.

  19. High-energy, ceramic-disk Yb:LuAG laser amplifier.

    Science.gov (United States)

    Siebold, M; Loeser, M; Roeser, F; Seltmann, M; Harzendorf, G; Tsybin, I; Linke, S; Banerjee, S; Mason, P D; Phillips, P J; Ertel, K; Collier, J C; Schramm, U

    2012-09-24

    We report the first short-pulse amplification results to several hundred millijoule energies in ceramic Yb:LuAG. We have demonstrated ns-pulse output from a diode-pumped Yb:LuAG amplifier at a maximum energy of 580 mJ and a peak optical-to-optical efficiency of 28% at 550 mJ. In cavity dumped operation of a nanosecond oscillator we obtained 1 mJ at up to 100 Hz repetition rate. A gain bandwidth of 5.4 nm was achieved at room temperature by measuring the small-signal single-pass gain. Furthermore, we compared our results with Yb:YAG within the same amplifier system.

  20. Spin wave and spin flip in hexagonal LuMnO3 single crystal

    Science.gov (United States)

    Chen, Xiang-Bai; Guo, Peng-Cheng; Huyen, Nguyen Thi; Kim, Seung; Yang, In-Sang; Wang, Xueyun; Cheong, Sang-Wook

    2017-03-01

    Manipulation and control of spin wave and spin flip are crucial for future developments of magnonic and spintronic devices. We present that the spin wave in hexagonal LuMnO3 single crystal can be selectively excited with laser polarization perpendicular to the c-axis of hexagonal LuMnO3 and photon energy ˜1.8 eV. The selective excitation of spin wave also suggests that the spin flip can be selectively controlled in hexagonal manganites. In addition, a microscopic model of the spin wave generation correlated with the four-spin-flip in hexagonal manganites is suggested to account for the line-shape of the observed spin wave.

  1. Exchange effects on the electronic excitations in the optical spectrum of LuMnO_3

    Science.gov (United States)

    Drew, H. D.; Simpson, J. R.; Sushkov, A. B.; Romero, D. B.; Quijada, M.; Ahn, J. S.; Ishibashi, H.; Hur, N.; Cheong, S. W.; Millis, A. J.

    2003-03-01

    Hexagonal LuMnO3 is a multiferroic material with ferroelectric phase transition at 900 K and it becomes an antiferromagnet with a high degree of frustration at 90 K. We have measured the optical conductivity of single crystal LuMnO3 from 1 meV to 5.5 eV in E||c and E⊥ c polarizations at temperatures between 4 and 300 K. A symmetry allowed (E⊥ c) on-site d-d transition near 1.7 eV is observed to blue shift ( ˜0.15 eV) with an inflection point at TN in the antiferromagnetic state due to Mn-Mn exchange energy effects. Photoluminescence measurements reveal a Jahn-Teller splitting in the optical excited state. This work has been supported by the NSF-MRSEC at the University of Maryland, DMR 0080008.

  2. Quantum oscillation measurements of β-LuAlB{sub 4}

    Energy Technology Data Exchange (ETDEWEB)

    Reiss, Pascal; Baglo, Jordan; Chen, Xiaoye; Tan, HongEn; Sutherland, Michael; Grosche, F. Malte [Cavendish Laboratory, University of Cambridge, Cambridge (United Kingdom); Friedemann, Sven [HH Wills Laboratory, University of Bristol, Bristol (United Kingdom); Goh, Swee K. [Chinese University of Hong Kong, Shatin, N.T. (China); Kuga, Kentaro; Nakatsuji, Satoru [Institute for Solid State Physics, University of Tokyo, Kashiwa (Japan); Harima, Hisatomo [Department of Physics, Graduate School of Science, Kobe University, Kobe (Japan)

    2016-07-01

    The Yb-based heavy fermion superconductor β-YbAlB{sub 4} displays a quantum critical point without tuning by applied pressure, magnetic field, or doping, which has been attributed to an unusual renormalised band structure. Quantum oscillation measurements of the Fermi surface in β-YbAlB{sub 4} have so far proved inconclusive, motivating us to undertake a detailed study of the isostructural reference compound β-LuAlB{sub 4}, which in contrast to the Yb compound is characterised by a filled 4f shell. We present comprehensive results from rotation and mass studies in β-LuAlB{sub 4}, which broadly agree with band structure calculations and display moderate mass enhancements contrasting with the much larger enhancements seen in β-YbAlB{sub 4} - further emphasising the important contribution of f electrons to the itinerant electron physics of β-YbAlB{sub 4}.

  3. SuperLU{_}DIST: A scalable distributed-memory sparse direct solver for unsymmetric linear systems

    Energy Technology Data Exchange (ETDEWEB)

    Li, Xiaoye S.; Demmel, James W.

    2002-03-27

    In this paper, we present the main algorithmic features in the software package SuperLU{_}DIST, a distributed-memory sparse direct solver for large sets of linear equations. We give in detail our parallelization strategies, with focus on scalability issues, and demonstrate the parallel performance and scalability on current machines. The solver is based on sparse Gaussian elimination, with an innovative static pivoting strategy proposed earlier by the authors. The main advantage of static pivoting over classical partial pivoting is that it permits a priori determination of data structures and communication pattern for sparse Gaussian elimination, which makes it more scalable on distributed memory machines. Based on this a priori knowledge, we designed highly parallel and scalable algorithms for both LU decomposition and triangular solve and we show that they are suitable for large-scale distributed memory machines.

  4. Transculturation of Madness: The Double Origin of Lu Xun's "Diary of a Madman".

    Science.gov (United States)

    Ma, Xiaolu

    2015-01-01

    Over the years scholars have examined the allegorical features of the depiction of madness in Lu Xun's "Diary of a Madman," yet to date little research has taken into consideration the intercultural angle embedded in the narrative's intersection of three cultures, namely Russian, Japanese and Chinese. This paper traces the European-Japanese-Sino route of modern neologisms of madness to explore the introduction of such neologisms into the modern Chinese language and how it corresponds with changing patterns of knowledge and power. I use my study of transculturation on the macro scale to frame a reexamination of the lexicon in "Diary of a Madman." I focus especially on kuangren and pohaikuang, the two key words employed by Lu Xun, to see how they contribute to the ambiguity in his attitude towards the power struggle between the East and the West, the old and the new.

  5. Photon strength functions in 177Lu: Study of scissors resonance in high-spin region

    Directory of Open Access Journals (Sweden)

    Bečvář F.

    2015-01-01

    Full Text Available The nucleus 177Lu is characteristic by an unusually high value of the thermal-neutron capturing state spin, J = 13/2, and by distinct low-energy rotational bands built on the 7/2+ ground state and the 9/2− level at 150 keV. The γ cascades connecting the capturing state with the members of these bands carry unique information about the role of identical M1 scissors-mode resonances, built according to Brink hypothesis assumingly on each energy level, even in conditions of fast nuclear rotation. With this motivation we measured a set of spectra of two-step γ cascades following the thermal neutron capture in 176Lu. The measurement was performed at neutron beam of the LWR-15 Reactor in Řež. From the analysis of these spectra the common parameters of the scissors resonances were deduced. The obtained results are discussed.

  6. Electronic Raman scattering and the renormalization of the electron spectrum in LuB{sub 12}

    Energy Technology Data Exchange (ETDEWEB)

    Ponosov, Yu. S., E-mail: ponosov@imp.uran.ru; Streltsov, S. V., E-mail: streltsov@gmail.com [Russian Academy of Sciences, Institute of Metal Physics, Ural Branch (Russian Federation); Levchenko, A. V.; Filippov, V. B. [National Academy of Sciences of Ukraine, Frantsevich Institute of Materials Science Problems (Ukraine)

    2016-09-15

    The electronic Raman scattering in LuB{sub 12} single crystals of various isotope compositions is studied in the temperature range 10–650 K. The shape and the energy position of spectral maxima depend on the direction and magnitude of a probe wavevector, the temperature, and the excitation symmetry and remain unchanged when the isotope composition changes. Experimental spectra are compared with the spectra simulated on the basis of a calculated electronic structure. The experimental results are successfully described when the electron spectrum renormalization effects caused by electron–phonon coupling are taken into account. This confirms that the origin of the observed spectra in LuB{sub 12} is due to Raman scattering by electrons. A comparison of the calculated and experimental data makes it possible to determine the coupling constant (λ{sub ep} = 0.32) that gives the correct superconducting transition temperature.

  7. Coexisting wobbling and quasiparticle excitations in the triaxial potential well of {sup 163}Lu

    Energy Technology Data Exchange (ETDEWEB)

    Jensen, D.R.; Hagemann, G.B.; Herskind, B.; Sletten, G.; Wilson, J.N. [Niels Bohr Institute, Blegdamsvej 17, DK-2100, Copenhagen (Denmark); Hamamoto, I. [Niels Bohr Institute, Blegdamsvej 17, DK-2100, Copenhagen (Denmark); Department of Mathematical Physics, LTH, University of Lund, Lund (Sweden); Oedegaard, S.W. [Department of Physics, University of Oslo, PB 1048 Blindern, N-0316, Oslo (Norway); Spohr, K. [Department of Electronic Engineering and Physics, University of Paisley (United Kingdom); Huebel, H.; Bringel, P.; Neusser, A.; Schoenwasser, G.; Singh, A.K. [Helmholtz-Institut fuer Strahlen- und Kernphysik, University of Bonn, Nussallee 14-16, D-53115, Bonn (Germany); Ma, W.C.; Amro, H. [Mississippi State University, MS 39762, Mississippi State (United States); Bracco, A.; Leoni, S.; Benzoni, G. [Dipartimento di Fisica and INFN, Sezione di Milano, Milano (Italy); Maj, A. [Niewodniczanski Insitute of Nuclear Physics, Krakow (Poland); Petrache, C.M. [Dipartimento di Fisica and INFN, Sezione di Padova, Padova (Italy); Dipartimento di Matematica e Fisica, Universita di Camerino, Camerino (Italy); Lo Bianco, G.; Bednarczyk, P.; Curien, D.

    2004-02-01

    High-spin states of the nucleus {sup 163}Lu have been populated through the fusion-evaporation reaction {sup 139}La({sup 29}Si,5n) with a beam energy of 157 MeV. In addition to the two lowest excited triaxial strongly deformed (TSD) bands, recently interpreted as one- and two-phonon wobbling excitations, a third excited TSD band has been firmly established decaying to the yrast TSD band. The assignment of this band as a three-quasiparticle band shows together with the normal deformed (ND) level scheme the presence not only of shape coexistence between ND and TSD structures, but also an interplay of wobbling and quasiparticle excitations in the triaxial strongly deformed potential well of {sup 163}Lu. (orig.)

  8. Experimental evaluation and thermodynamic assessment of the LiF-LuF{sub 3} phase diagram

    Energy Technology Data Exchange (ETDEWEB)

    Santos, I.A. dos [Instituto de Pesquisas Energeticas e Nucleares, CP 11049, Butanta 05422-970, Sao Paulo, SP (Brazil); Klimm, D. [Leibniz Institute for Crystal Growth, Max-Born-Strasse 2, 12489 Berlin (Germany); Baldochi, S.L.; Ranieri, I.M. [Instituto de Pesquisas Energeticas e Nucleares, CP 11049, Butanta 05422-970, Sao Paulo, SP (Brazil)

    2013-01-20

    The phase diagram of the system LiF-LuF{sub 3} has been revised using thermal analysis. Specific heat capacity and enthalpy of phase transition and fusion were measured by differential scanning calorimetry for all compounds belonging to the system. A thermodynamic optimization of the LiF-LuF{sub 3} phase diagram was performed by fitting the Gibbs energy functions to the experimental data that were taken from the literature or measured in this work. Excess energy terms, which describe the effect of interaction between the two fluoride compounds in the liquid solution, were expressed by the Redlich-Kister polynomial function. The assessed phase diagram was in suitable agreement with the re-evaluated experimental data.

  9. Preparation and Characterization of {sup 177}Lu Labeled Antibody against Tyrosine Kinase Receptor Her2

    Energy Technology Data Exchange (ETDEWEB)

    Lee, So-Young; Hong, Young-Don; Choi, Sun-Ju [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)

    2008-05-15

    The tyrosine kinase receptor Her2, also known in humans as erbB2, is a member of the epidermal growth factor receptor (EGFR or erbB1) family. The Her2 is highly expressed in many cancer types and over expressed in approximately 30% of all primary breast cancer. Overexpression of Her2 is associated with a poor prognosis. Her2 is a suitable target because it involves an extracellular domain that can be targeted by antibodies produced by B cells. Based on these advantages, we tried to prepare the {sup 177}Lu labeled Her2 antibody. This radioimmunoconjugate could act by not only blocking the Her2 signalling pathway using antibody but also killing the tumour cell using {beta} energy of {sup 177}Lu.

  10. Hexagonal frustrated RMnO3 manganites (R = Y, Lu) under high pressure

    Science.gov (United States)

    Kozlenko, D. P.; Kichanov, S. E.; Lee, S.; Park, J.-G.; Glazkov, V. P.; Savenko, B. N.

    2007-05-01

    The crystalline and magnetic structures of YMnO3 and LuMnO3 hexagonal manganites under pressures of 0 6 GPa and in the temperature range 10 295 K have been investigated by neutron diffraction. Application of pressure leads to a significant decrease in the ordered magnetic moment of Mn ions (at T = 10 K) from 3.27 (0 GPa) to 1.52 μB (5 GPa) for YMnO3 and from 2.48 (0 GPa) to 1.98 μB (6 GPa) for LuMnO3. Under high pressures, spin reorientation of Mn magnetic moments and a change in the symmetry of the antiferromagnetic structure are observed in YMnO3. The relationship between the triangular lattice distortion parameter and the symmetry of the triangular antiferromagnetic state of RMnO3 hexagonal manganites is discussed.

  11. Nano-Ceramic Coated Plastics

    Science.gov (United States)

    Cho, Junghyun

    2013-01-01

    Plastic products, due to their durability, safety, and low manufacturing cost, are now rapidly replacing cookware items traditionally made of glass and ceramics. Despite this trend, some still prefer relatively expensive and more fragile ceramic/glassware because plastics can deteriorate over time after exposure to foods, which can generate odors, bad appearance, and/or color change. Nano-ceramic coatings can eliminate these drawbacks while still retaining the advantages of the plastic, since the coating only alters the surface of the plastic. The surface coating adds functionality to the plastics such as self-cleaning and disinfectant capabilities that result from a photocatalytic effect of certain ceramic systems. These ceramic coatings can also provide non-stick surfaces and higher temperature capabilities for the base plastics without resorting to ceramic or glass materials. Titanium dioxide (TiO2) and zinc oxide (ZnO) are the candidates for a nano-ceramic coating to deposit on the plastics or plastic films used in cookware and kitchenware. Both are wide-bandgap semiconductors (3.0 to 3.2 eV for TiO2 and 3.2 to 3.3 eV for ZnO), so they exhibit a photocatalytic property under ultraviolet (UV) light. This will lead to decomposition of organic compounds. Decomposed products can be easily washed off by water, so the use of detergents will be minimal. High-crystalline film with large surface area for the reaction is essential to guarantee good photocatalytic performance of these oxides. Low-temperature processing (nano-ceramic coatings (TiO2, ZnO) on plastic materials (silicone, Teflon, PET, etc.) that can possess both photocatalytic oxide properties and flexible plastic properties. Processing cost is low and it does not require any expensive equipment investment. Processing can be scalable to current manufacturing infrastructure.

  12. Biodegradability of degradable plastic waste.

    Science.gov (United States)

    Agamuthu, P; Faizura, Putri Nadzrul

    2005-04-01

    Plastic waste constitutes the third largest waste volume in Malaysian municipal solid waste (MSW), next to putrescible waste and paper. The plastic component in MSW from Kuala Lumpur averages 24% (by weight), whereas the national mean is about 15%. The 144 waste dumps in the country receive about 95% of the MSW, including plastic waste. The useful life of the landfills is fast diminishing as the plastic waste stays un-degraded for more than 50 years. In this study the compostability of polyethylene and pro-oxidant additive-based environmentally degradable plastics (EDP) was investigated. Linear low-density polyethylene (LLDPE) samples exposed hydrolytically or oxidatively at 60 degrees C showed that the abiotic degradation path was oxidative rather than hydrolytic. There was a weight loss of 8% and the plastic has been oxidized as shown by the additional carbonyl group exhibited in the Fourier transform infra red (FTIR) Spectrum. Oxidation rate seemed to be influenced by the amount of pro-oxidant additive, the chemical structure and morphology of the plastic samples, and the surface area. Composting studies during a 45-day experiment showed that the percentage elongation (reduction) was 20% for McD samples [high-density polyethylene, (HDPE) with 3% additive] and LL samples (LLDPE with 7% additive) and 18% reduction for totally degradable plastic (TDP) samples (HDPE with 3% additive). Lastly, microbial experiments using Pseudomonas aeroginosa on carbon-free media with degradable plastic samples as the sole carbon source, showed confirmatory results. A positive bacterial growth and a weight loss of 2.2% for degraded polyethylene samples were evident to show that the degradable plastic is biodegradable.

  13. Effects of Phase Composition on Microstructure and Mechanical Properties of Lu2O3-doped Porous Silicon Nitride Ceramics

    Institute of Scientific and Technical Information of China (English)

    Quan Li; Xiaowei Yin

    2011-01-01

    Porous silicon nitride ceramics (Si3N4) were fabricated by pressureless sintering using different particle size of silicon nitride powder. Lu2O3 was used as sintering additive. According to phase relationships in the ternary system Si3N4-SiO2-Lu2O3, porous Si3N4 ceramics with different phase composition were designed through the change of the content of SiO2 which was formed by the oxidation at 800℃ in air. Porous Si3N4 with different phase compositions was obtained after sintering at 1800℃in N2atmosphere. A small content of SiO2 favored the formation of secondary phase Lu4Si2O7N2, while large content of SiO2 favored the formation of secondary phase Lu2Si2O7 and Si2N2O. Porous Si3N4 ceramics with secondary phase Lu4Si2O7N2 had a flexural strength of 207 MPa, while that with secondary phase Si2N2O and Lu2Si2O7 had lower flexural strength.

  14. Spin-lattice coupling and frustrated magnetism in Fe-doped hexagonal LuMnO3

    Science.gov (United States)

    Nair, Harikrishnan S.; Fu, Zhendong; Kumar, C. M. N.; Pomjakushin, V. Y.; Xiao, Yinguo; Chatterji, Tapan; Strydom, André M.

    2015-05-01

    Strong spin-lattice coupling and prominent frustration effects observed in the 50% Fe-doped frustrated hexagonal (h)\\text{LuMnO}3 are reported. A Néel transition at T{N}≈112 \\text{K} and a possible spin re-orientation transition at T{SR}≈55 \\text{K} are observed in the magnetization data. From neutron powder diffraction data, the nuclear structure at and below 300 K was refined in polar P63cm space group. While the magnetic structure of LuMnO3 belongs to the Γ4 (P6'_3c'm) representation, that of LuFe0.5Mn0.5O3 belongs to Γ1 (P6_3cm) which is supported by the strong intensity for the (100) reflection and also judging by the presence of spin-lattice coupling. The refined atomic positions for Lu and Mn/Fe indicate significant atomic displacements at T{N} and T{SR} which confirms strong spin-lattice coupling. Our results complement the discovery of room temperature multiferroicity in thin films of h\\text{LuFeO}3 and would give impetus to study LuFe1-x Mn x O3 systems as potential multiferroics where electric polarization is linked to giant atomic displacements.

  15. Effect of Li+ ions co-doping on luminescence, scintillation properties and defects characteristics of LuAG:Ce ceramics

    Science.gov (United States)

    Liu, Shuping; Feng, Xiqi; Mares, Jiri A.; Babin, Vladimir; Hu, Chen; Kou, Huamin; D'Ambrosio, Carmelo; Li, Jiang; Pan, Yubai; Nikl, Martin

    2017-02-01

    Monovalent Li+ codoped Lu3Al5O12:Ce (LuAG:Ce) optical ceramics were fabricated by solid state reaction method and further optimized by an air-annealing process. Optical absorption, radioluminescence spectra and scintillation properties such as light yield, scintillation decay times and afterglow were measured and compared with those of the Li+ free LuAG:Ce ceramic and the commercial LuAG:Ce single crystal samples. Positive effect of Li+ codopant consists mainly in the significant increase of scintillation light yield, acceleration of scintillation decay as well as the decrease of afterglow intensity. With 0.3% Li codoping, the obtained LuAG:Ce,Li ceramic displays a light yield of ∼29200 ph/MeV at 10 μs shaping time, higher than that of the LuAG:Ce single crystal and optical ceramic scintillators ever reported. The partial conversion of the stable Ce3+ to Ce4+ centers and the shallow and deep traps effect suppression by the Li+ codoping are discussed.

  16. HORSE, WOMEN, WEAPON IN THE EPIC OF KÖROĞLU / KÖROĞLU DESTANI’NDA AT, KADIN, SİLAH

    Directory of Open Access Journals (Sweden)

    Mehmet Emin BARS (M.A.H.

    2008-05-01

    Full Text Available The epic of Köroğlu is one of the most loved epics whichreaches today from long centuries and stil keeps its place ofimportance in narration tradition. Đt is an epical work that leftdeep influences over Turkish world and over nations livedtogether with Turks for long centuries. Đt is a monument,binding the past and the present. Even today when taken intoconsideration of the wideness of its narreted and listenedgeographical area its importance from the view of maintainingthe cultural integrity between Turks will be understood muchbeter. Đt is difficult to come across such a work whichmaintains its vitality and dynamism with a wide performancearea in the lives of other nations. The perfection and thereachment of education level in Turkish epic tradition are thefactors which cause this result. Đn our writing the concepts ofhorse, woman and weapon which take place in Turkomanvariant of Köroğlu will be discussed.

  17. Efficient femtosecond high power Yb:Lu(2)O(3) thin disk laser.

    Science.gov (United States)

    Marchese, S V; Baer, C R E; Peters, R; Kränkel, C; Engqvist, A G; Golling, M; Maas, D J H C; Petermann, K; Südmeyer, T; Huber, G; Keller, U

    2007-12-10

    We demonstrate the first passively mode-locked thin disk laser based on Yb:Lu(2)O(3). The laser generates 370-fs pulses with 20.5 W of average power in a diffraction-limited beam (M(2) pump power of 56 W, resulting in an optical-to-optical efficiency of 43%, which is higher than for any previously mode-locked thin disk laser.

  18. Probability and Statistics——in Honor of Pao-Lu Hsu's 100th Birthday

    Institute of Scientific and Technical Information of China (English)

    Dayue CHEN; Zhi GENG; Zhi-Ming MA

    2011-01-01

    Professor Pao-Lu Hsu (1910-1970) was the pioneer and founding father of Probability and Statistics in China.His research work ranged from limit theory,statistical inference,multivariate analysis,to random matrices and other related topics,and were well recognized by his peers.He was the first Chinese probabilist/statistician with the world fame,though many of his papers were written in Chinese and were published in Chinese journals.

  19. First principle calculation of structure and lattice dynamics of Lu2Si2O7

    Science.gov (United States)

    Nazipov, D. V.; Nikiforov, A. E.

    2016-12-01

    Ab initio calculations of crystal structure and Raman spectra has been performed for single crystal of lutetium pyrosilicate Lu2Si2O7. The types of fundamental vibrations, their frequencies and intensities in the Raman spectrum has been obtained for two polarizations. Calculations were made in the framework of density functional theory (DFT) with hybrid functionals. The isotopic substitution was calculated for all inequivalent ions in cell. The results in a good agreement with experimental data.

  20. LU分解的增长因子%ON GROWTH FACTORS OF THE LU FACTORIZATION

    Institute of Scientific and Technical Information of China (English)

    魏木生; 刘巧华

    2008-01-01

    In this article, we derive upper bounds of different growth factors for the LU factorization, which are dominated by A11(k)-1A12(k),A21(k)A11(k)-1, where A11(k), A12(k), A21(k), A22(k) are sub-matrices of A. We also derive upper bounds of growth factors for the Cholesky factorization. Numerical examples are presented to verify our findings.

  1. Bien écrire en affaires savoir rédiger pour être lu et convaincre

    CERN Document Server

    Berrou, Jean-Paul

    1991-01-01

    Ce qu'il faut savoir pour bien rédiger ses écrits professionnels au travers d'une démarche méthodique pour bien organiser sa pensée en vue d'écrire efficacement, de conseils et de techniques pour être compris à coup sûr et être lu jusqu'au bout avec intérêt. Agrémenté de nombreux exemples concrets.

  2. Quantitative (177)Lu SPECT imaging using advanced correction algorithms in non-reference geometry.

    Science.gov (United States)

    D'Arienzo, M; Cozzella, M L; Fazio, A; De Felice, P; Iaccarino, G; D'Andrea, M; Ungania, S; Cazzato, M; Schmidt, K; Kimiaei, S; Strigari, L

    2016-12-01

    Peptide receptor therapy with (177)Lu-labelled somatostatin analogues is a promising tool in the management of patients with inoperable or metastasized neuroendocrine tumours. The aim of this work was to perform accurate activity quantification of (177)Lu in complex anthropomorphic geometry using advanced correction algorithms. Acquisitions were performed on the higher (177)Lu photopeak (208keV) using a Philips IRIX gamma camera provided with medium-energy collimators. System calibration was performed using a 16mL Jaszczak sphere surrounded by non-radioactive water. Attenuation correction was performed using μ-maps derived from CT data, while scatter and septal penetration corrections were performed using the transmission-dependent convolution-subtraction method. SPECT acquisitions were finally corrected for dead time and partial volume effects. Image analysis was performed using the commercial QSPECT software. The quantitative SPECT approach was validated on an anthropomorphic phantom provided with a home-made insert simulating a hepatic lesion. Quantitative accuracy was studied using three tumour-to-background activity concentration ratios (6:1, 9:1, 14:1). For all acquisitions, the recovered total activity was within 12% of the calibrated activity both in the background region and in the tumour. Using a 6:1 tumour-to-background ratio the recovered total activity was within 2% in the tumour and within 5% in the background. Partial volume effects, if not properly accounted for, can lead to significant activity underestimations in clinical conditions. In conclusion, accurate activity quantification of (177)Lu can be obtained if activity measurements are performed with equipment traceable to primary standards, advanced correction algorithms are used and acquisitions are performed at the 208keV photopeak using medium-energy collimators.

  3. Neutron capture measurement on {sup 173}Lu at LANSCE with DANCE detector

    Energy Technology Data Exchange (ETDEWEB)

    Theroine, C.; Ebran, A.; Meot, V.; Roig, O. [CEA DAM DIF, F-91297 Arpajon (France); Bond, E. M.; Bredeweg, T. A.; Couture, A.; Haight, R. C.; Jandel, M.; Nortier, F. M.; O' Donnell, J. M.; Rundberg, R. S.; Taylor, W. A.; Ullmann, J. L.; Viera, D. J.; Wilhelmy, J. B.; Wouters, J. M. [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

    2013-06-10

    The (n,{gamma}) cross section on the unstable {sup 173}Lu(t{sub 1/2} = 1.37y) has been measured from thermal energy up to 200 eV at Los Alamos Neutron Science Center (LANSCE) with The Detector for Advanced Neutron Capture Experiements (DANCE). The main aim of this study is to validate and optimize reaction models for unstable nucleus. A preliminary capture yield will be presented in this paper.

  4. Neutron capture measurement on 173Lu at LANSCE with DANCE detector

    Science.gov (United States)

    Theroine, C.; Ebran, A.; Méot, V.; Roig, O.; Bond, E. M.; Bredeweg, T. A.; Couture, A.; Haight, R. C.; Jandel, M.; Nortier, F. M.; O'Donnell, J. M.; Rundberg, R. S.; Taylor, W. A.; Ullmann, J. L.; Viera, D. J.; Wilhelmy, J. B.; Wouters, J. M.

    2013-06-01

    The (n,γ) cross section on the unstable 173Lu(t1/2 = 1.37y) has been measured from thermal energy up to 200 eV at Los Alamos Neutron Science Center (LANSCE) with The Detector for Advanced Neutron Capture Experiements (DANCE). The main aim of this study is to validate and optimize reaction models for unstable nucleus. A preliminary capture yield will be presented in this paper.

  5. Implementation of BT, SP, LU, and FT of NAS Parallel Benchmarks in Java

    Science.gov (United States)

    Schultz, Matthew; Frumkin, Michael; Jin, Hao-Qiang; Yan, Jerry

    2000-01-01

    A number of Java features make it an attractive but a debatable choice for High Performance Computing. We have implemented benchmarks working on single structured grid BT,SP,LU and FT in Java. The performance and scalability of the Java code shows that a significant improvement in Java compiler technology and in Java thread implementation are necessary for Java to compete with Fortran in HPC applications.

  6. Measurement of conversion coefficients in normal and triaxial strongly deformed bands in {sup 167}Lu.

    Energy Technology Data Exchange (ETDEWEB)

    Gurdal, G.; Beausang, C. W.; Brenner, D. S.; Ai, H.; Casten, R. F.; Crider, B.; Heinz, A.; Williams, E.; Hartley, D. J.; Carpenter, M. P.; Hecht, A. A.; Janssens, R. V. F.; Lauritsen, T.; Lister, C. J.; Raabe, R.; Seweryniak, D.; Zhu, S.; Saladin, J. X.; Physics; Yale Univ.; Clark Univ.; Univ. of Richmond; United States Naval Academy; Univ. of Maryland; Univ. of Pittsburgh

    2008-01-01

    Internal conversion coefficients have been measured for transitions in both normal deformed and triaxial strongly deformed bands in {sup 167}Lu using the Gammasphere and ICE Ball spectrometers. The results for all in-band transitions are consistent with E2 multipolarity. Upper limits are determined for the internal conversion coefficients for linking transitions between TSD Band 2 and TSD Band 1, the n{sub w} = 1 and n{sub w} = 0 wobbling bands, respectively.

  7. Achieving numerical accuracy and high performance using recursive tile LU factorization with partial pivoting

    KAUST Repository

    Dongarra, Jack

    2013-09-18

    The LU factorization is an important numerical algorithm for solving systems of linear equations in science and engineering and is a characteristic of many dense linear algebra computations. For example, it has become the de facto numerical algorithm implemented within the LINPACK benchmark to rank the most powerful supercomputers in the world, collected by the TOP500 website. Multicore processors continue to present challenges to the development of fast and robust numerical software due to the increasing levels of hardware parallelism and widening gap between core and memory speeds. In this context, the difficulty in developing new algorithms for the scientific community resides in the combination of two goals: achieving high performance while maintaining the accuracy of the numerical algorithm. This paper proposes a new approach for computing the LU factorization in parallel on multicore architectures, which not only improves the overall performance but also sustains the numerical quality of the standard LU factorization algorithm with partial pivoting. While the update of the trailing submatrix is computationally intensive and highly parallel, the inherently problematic portion of the LU factorization is the panel factorization due to its memory-bound characteristic as well as the atomicity of selecting the appropriate pivots. Our approach uses a parallel fine-grained recursive formulation of the panel factorization step and implements the update of the trailing submatrix with the tile algorithm. Based on conflict-free partitioning of the data and lockless synchronization mechanisms, our implementation lets the overall computation flow naturally without contention. The dynamic runtime system called QUARK is then able to schedule tasks with heterogeneous granularities and to transparently introduce algorithmic lookahead. The performance results of our implementation are competitive compared to the currently available software packages and libraries. For example

  8. First principle calculation of structure and lattice dynamics of Lu2Si2O7

    Directory of Open Access Journals (Sweden)

    Nazipov D.V.

    2017-01-01

    Full Text Available Ab initio calculations of crystal structure and Raman spectra has been performed for single crystal of lutetium pyrosilicate Lu2Si2O7. The types of fundamental vibrations, their frequencies and intensities in the Raman spectrum has been obtained for two polarizations. Calculations were made in the framework of density functional theory (DFT with hybrid functionals. The isotopic substitution was calculated for all inequivalent ions in cell. The results in a good agreement with experimental data.

  9. The 4f-5d luminescence transitions in cerium-doped LuF3

    Science.gov (United States)

    Guerbous, L.; Krachni, O.

    Emission and excitation spectra of the Ce3+ ion in LuF3 single crystal were measured at 77 K. The broad bands observed in these spectra were attributed to the parity-allowed electric-dipole 4f ← 5d transitions within Ce3+ ion. No zero-phonon lines were observed, which is indicative of a strong electron-phonon coupling in this host. It is shown that Ce3+ 5d excited configuration splits into five crystal-field components in LuF3. The influence of the crystalline environment on the position of the lowest Ce3+ 5d level is investigated. The energy of the lowest level of the 4fN-15d excited configuration was predicted for all the trivalent rare earth ions embedded in LuF3. Positions of crystal field spitting levels of 4fN-15d configuration relative to the host electronic bands were discussed.

  10. Angle-dependent magnetoresistance and quantum oscillations in high-mobility semimetal LuPtBi

    KAUST Repository

    Xu, Guizhou

    2017-03-14

    The recent discovery of ultrahigh mobility and large positive magnetoresistance in topologically non-trivial Half-Heusler semimetal LuPtBi provides a unique playground for studying exotic physics and significant perspective for device applications. As an fcc-structured electron-hole-compensated semimetal, LuPtBi theoretically exhibits six symmetrically arranged anisotropic electron Fermi pockets and two nearly-spherical hole pockets, offering the opportunity to explore the physics of Fermi surface with a simple angle-related magnetotransport properties. In this work, through the angle-dependent transverse magnetoresistance measurements, in combination with high-field SdH quantum oscillations, we achieved to map out a Fermi surface with six anisotropic pockets in the high-temperature and low-field regime, and furthermore, identify a possible magnetic field driven Fermi surface change at lower temperatures. Reasons account for the Fermi surface change in LuPtBi are discussed in terms of the field-induced electron evacuation due to Landau quantization.

  11. Geochronology of the volcanic rocks in the Lu-Zong basin and its significance

    Institute of Scientific and Technical Information of China (English)

    David; COOKE; Sebastien; MEFFRE

    2008-01-01

    The Lu-Zong (Lujiang-Zongyang) basin is one of the most important volcanic basins in the middle and lower reaches of the Yangtze River area, China. It comprises four shoshonitic volcanic units, which are, in an ascending order, the Longmenyuan, Zhuanqiao, Shuangmiao and Fushan Groups. The LA-ICP MS U-Pb zircon ages of the four units are: 134.8±1.8 Ma for the Longmenyuan Group, 134.1±1.6 Ma for the Zhuanqiao Group, 130.5±0.8 Ma for the Shuangmiao Group, and 127.1±1.2 Ma for the Fushan Group. The results indicate that all volcanic rocks in the Lu-Zong basin were formed in the Early Cretaceous from about 135 Ma to 127 Ma, lasting 8-10 Ma. There were no Jurassic volcanic activities in all the volcanic basins including the Lu-Zong basin in the middle and lower reaches of the Yangtze River area. This work has provided new chronological results for the further study and understanding of the tec- tonic, magmatic and metallogenic processes of eastern China in the Mesozoic.

  12. Enhanced Multiferroicity in LuFeO3 Through Sc Doping

    Science.gov (United States)

    Disseler, Steven; Oh, Yoon Seok; Hu, Rongwei; Luo, Xuan; Lynn, Jeff; Cheong, Sang-Wook; Ratcliff, William

    2015-03-01

    Hexagonal manganites of the type RMnO3 are well known examples of single-phase multiferroic materials, but suffer from low magnetic ordering temperatures and weak magnetoelectric coupling making them unsuitable for implementation in devices. Recently, the isostructural ferrites RFeO3 have been proposed as promising materials to exhibit greatly enhanced magnetic properties, including a much stronger coupling mechanism between ferromagnetic moment and ferroelectic polarization. Here we present a magnetometry and neutron scattering investigation of LuFeO3 forced into the ferroelectric structure through Sc-doping. We find the magnetic ordering temperature dramatically increases relative to pure hexagonal LuFeO3 and LuMnO3, as well as an unusual spin-reorientation at low temperatures. We will discuss possible mechanisms for this reorientation and how it provides insight into the enhanced magnetic properties Limit of the RFeO3 series. Supported in part by DOE Grant No. DE-FG02-07ER46382.

  13. Critical magnetic scattering in geometric frastrated multiferroic LuMnO3

    Science.gov (United States)

    Yano, Shinichiro; Li, Bing; Louca, Despina; Qiu, Yiming; Copley, John

    2013-03-01

    The coexistence of competing order parameters in the class of materials referred to as the multiferroics is of great interest. The hexagonal manganites AMnO3 (A = Y, Lu, Ho and Yb) with the P63cm space group exhibit a ferroelectric transition, at very high temperatures, typically ~ 1000 K, while the antiferromagnetic transition, TN, occurs at ~ 100K. Earlier studies on YMnO3 and LuMnO3 using neutron scattering on single crystals showed that diffuse scattering is present around the forbidden nuclear (100) Bragg peak which corresponds to Q=1.20 Å-1.Its intensity rises very sharply and drops just around TN. We performed inelastic neutron scattering measurement on a powder sample of LuMnO3 form 4 to 250 K using the DCS at NIST. Strong inelastic intensity, not due to magnon excitations, is observed at Q=1.32 and 2.50 Å-1. With cooling, the intensity gradually rises and reaches a peak around 100 K. Below, it drops drastically once the system orders. This kind of scattering is due to critical scattering arising from magnetic fluctuations above TN. The S(Q, ω) is asymmetric suggesting that the Mn spin correlations are mosmost likely 2-dimensional in nature.

  14. E -type noncollinear magnetic ordering in multiferroic o -LuMnO3

    Science.gov (United States)

    Mukherjee, Saumya; Dönni, Andreas; Nakajima, Taro; Mitsuda, Setsuo; Tachibana, Makoto; Kitazawa, Hideaki; Pomjakushin, Vladimir; Keller, Lukas; Niedermayer, Christof; Scaramucci, Andrea; Kenzelmann, Michel

    2017-03-01

    Multiferroic orthorhombic o -LuMnO3 exhibits large ferroelectric polarization induced by an E -type magnetic order. Recently, the E -type magnetic phase in LuMnO3 was proposed to feature magnetic moments tilted away from the collinear ordering. We employed neutron diffraction to determine the symmetry of the magnetic order in o -LuMnO3 . We observed that below TN=39 K, the Mn3 + spins order into an incommensurate amplitude-modulated phase that obeys the Pbnm crystal symmetry and is paraelectric. The incommensurate phase locks into a commensurate phase at TC=35.5 K described by a fully antiferromagnetic and noncollinear E -type order. This noncollinear E -type ordering breaks the spatial inversion symmetry and induces a spontaneous polarization at TC. At T =2 K, an appreciably large electric polarization was observed similar to that of other orthorhombic manganites featuring E -type magnetic order. We also present a Pbnm symmetry-allowed Dzyaloshinskii-Moriya interaction that explains the noncollinear E -type order in the commensurate phase. These results are in qualitative agreement with the type of distortions from collinear E -type antiferromagnetic order found using Monte Carlo simulation for rare-earth manganites [M. Mochizuki et al., Phys. Rev. B 84, 144409 (2011), 10.1103/PhysRevB.84.144409].

  15. On the photoelectron velocity-map imaging of lutetium monoxide anion LuO(-).

    Science.gov (United States)

    Liu, Zhiling; Xie, Hua; Li, Quanjiang; Qin, Zhengbo; Cong, Ran; Wu, Xia; Tang, Zichao; Fan, Hongjun

    2014-01-21

    We report a combined photoelectron velocity-map imaging spectroscopy and density functional theory investigation on lutetium monoxide anion. Transition between the X (1)Σ(+) anion electronic ground state and the neutral X (2)Σ(+) electronic ground state is observed. Vibrationally resolved spectra were obtained at four different photon energies, providing a wealth of spectroscopic information for the electronic ground states of the anionic lutetium monoxide and corresponding neutral species. Franck-Condon simulations of the ground-state transition are performed to assign vibrational structure in the spectra and to assist in identifying the observed spectral bands. The electronic ground state of LuO(-) is found to have a vibrational frequency of 743 ± 10 cm(-1) and an equilibrium bond length of 1.841 Å. The electron affinity of LuO is measured to be 1.624 ± 0.002 eV. The fundamental frequency of ground-state LuO is estimated to be 839 ± 10 cm(-1).

  16. Intrinsic energy resolution and light output of the $Lu_{07}Y_{03}$ AP:Ce scintillator

    CERN Document Server

    Kuntner, C; Lecoq, P; Pizzolotto, C; Schneegans, M

    2002-01-01

    Light output and energy resolution for a 2*2*10 mm/sup 3/ LuYAP:Ce crystal coupled to a XP2020Q photomultiplier were studied. The measured light output of 8530 photons/MeV includes the correction for the quantum efficiency of the XP2020Q photomultiplier. An energy resolution of 7.33% was obtained for 662 keV gamma -rays with a long face coupled to the PMT. The measured number of 2130 phe/MeV implies a photoelectron statistical contribution of 6.59% and hence a LuYAP intrinsic energy resolution of 3.21%. The relative light output of the LuYAP scintillator measured for photon energies varying from 31 keV to 1.333 MeV was constant within 7%. These observations are consistent with results for the YAP:Ce scintillator, and with the assumption that there is a direct correlation between the energy resolution of scintillators and non-proportionality of their light output versus energy in the low-energy domain. The results are compared to the relative light output of the LSO:Ce scintillator measured for varying energie...

  17. An In-Depth Analysis of the Chung-Lu Model

    Energy Technology Data Exchange (ETDEWEB)

    Winlaw, M. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); DeSterck, H. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Sanders, G. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2015-10-28

    In the classic Erd}os R enyi random graph model [5] each edge is chosen with uniform probability and the degree distribution is binomial, limiting the number of graphs that can be modeled using the Erd}os R enyi framework [10]. The Chung-Lu model [1, 2, 3] is an extension of the Erd}os R enyi model that allows for more general degree distributions. The probability of each edge is no longer uniform and is a function of a user-supplied degree sequence, which by design is the expected degree sequence of the model. This property makes it an easy model to work with theoretically and since the Chung-Lu model is a special case of a random graph model with a given degree sequence, many of its properties are well known and have been studied extensively [2, 3, 13, 8, 9]. It is also an attractive null model for many real-world networks, particularly those with power-law degree distributions and it is sometimes used as a benchmark for comparison with other graph generators despite some of its limitations [12, 11]. We know for example, that the average clustering coe cient is too low relative to most real world networks. As well, measures of a nity are also too low relative to most real-world networks of interest. However, despite these limitations or perhaps because of them, the Chung-Lu model provides a basis for comparing new graph models.

  18. A comparison of SuperLU solvers on the intel MIC architecture

    Science.gov (United States)

    Tuncel, Mehmet; Duran, Ahmet; Celebi, M. Serdar; Akaydin, Bora; Topkaya, Figen O.

    2016-10-01

    In many science and engineering applications, problems may result in solving a sparse linear system AX=B. For example, SuperLU_MCDT, a linear solver, was used for the large penta-diagonal matrices for 2D problems and hepta-diagonal matrices for 3D problems, coming from the incompressible blood flow simulation (see [1]). It is important to test the status and potential improvements of state-of-the-art solvers on new technologies. In this work, sequential, multithreaded and distributed versions of SuperLU solvers (see [2]) are examined on the Intel Xeon Phi coprocessors using offload programming model at the EURORA cluster of CINECA in Italy. We consider a portfolio of test matrices containing patterned matrices from UFMM ([3]) and randomly located matrices. This architecture can benefit from high parallelism and large vectors. We find that the sequential SuperLU benefited up to 45 % performance improvement from the offload programming depending on the sparse matrix type and the size of transferred and processed data.

  19. Crystal-field analysis of Eu sup 3 sup + in Lu sub 2 O sub 3

    CERN Document Server

    Karbowiak, M; Hoelsae, J

    2003-01-01

    Low temperature (7 K) absorption spectra of polycrystalline sintered ceramic Lu sub 2 O sub 3 :Eu sup 3 sup + were recorded between 3950 and 50000 cm sup - sup 1. There are two different intrinsic Eu sup 3 sup + sites, C sub 2 and S sub 6 (C sub 3 sub i), in this host. A total of 105 crystal-field (CF) energy levels were assigned and fitted to a semiempirical Hamiltonian representing the combined free-ion (FI) and CF interactions for a 4f sup 6 ion in the C sub 2 symmetry site. 10 FI and 14 CF parameters were varied simultaneously in the least square adjustments yielding an rms deviation between the calculated and experimental levels of 15 cm sup - sup 1. The CF strength parameter, S, obtained from calculated B sub q sup k parameters is larger for Lu sub 2 O sub 3 when compared to the Y sub 2 O sub 3 host, which is in accordance with the smaller ionic radius of the Lu sup 3 sup + ion. The CF splittings of the sup 7 F sub 1 and sup 5 D sub 1 levels were also determined experimentally for the Eu sup 3 sup + ion...

  20. A Comparative Study on the Two English Versions of Lu Xun’s Stories

    Institute of Scientific and Technical Information of China (English)

    ZHOU Shi-pei

    2015-01-01

    The two English versions of Lu Xun’s stories, translated by Julia Lovell and the Rangs, are to be studied from the eco-translatological perspective. A comparative study of the two English versions is made to figure out how the two translators linguis⁃tically and culturally make adaptive selections in the process of translation of Lu Xun ’s stories—In other words, how the eco-en⁃vironment has greatly influenced the two translators’decisions to make adaptations and choices in linguistic and cultural aspects. The thesis discovers that the eco-environment has greatly influenced the process of translating Lu Xun ’s stories into English and eco-translatology is feasible to analyze the two translations, that both the Yangs and Lovell have offered successful translations by making adaptive selections and selective transformations. Therefore, neither of the two translations is superior or inferior to one another in different translational eco-environments. Hopefully, the thesis may enrich current researches on the Yang ’s and Lovell’s translations and may be useful for the further study of applying eco-translatology to studies on other translators and their works.

  1. Wobbling phonon excitations, coexisting with normal deformed structures in sup 1 sup 6 sup 3 Lu

    CERN Document Server

    Jensen, D R; Hamamoto, I; Oedegard, S W; Bergström, M H; Herskind, B; Sletten, G; Toermaenen, S; Wilson, J N; Tjøm, P O; Spohr, K; Hübel, H; Görgen, A; Schoenwasser, G; Bracco, A; Leoni, S; Maj, A; Petrache, C M; Bednarczyk, P; Curien, D

    2002-01-01

    Wobbling is a rotational mode unique to a triaxial body. The Lu-Hf isotopes with N approx 94 at high spin provide a possible region of nuclei with pronounced triaxiality. We have investigated sup 1 sup 6 sup 3 Lu through the fusion-evaporation reaction sup 1 sup 3 sup 9 La( sup 2 sup 9 Si,5n) sup 1 sup 6 sup 3 Lu with a beam energy of 152 MeV. Three excited bands decaying into the known, presumably triaxial, superdeformed (TSD) band built on the i sub 1 sub 3 sub / sub 2 proton orbital are observed. The electromagnetic properties of the connecting transitions from the two strongest populated excited TSD bands have been investigated. New particle-rotor calculations in which one i sub 1 sub 3 sub / sub 2 quasiproton is coupled to the core of triaxial shape produce a variety of bands, whose properties can clearly be interpreted either as 'wobbling' or 'cranking' motion of the core. Evidence for the assignment of the excited TSD bands as one, and possibly even two wobbling phonon modes built on the yrast TSD band...

  2. Atomic and electronic structures of lutetium oxide Lu{sub 2}O{sub 3}

    Energy Technology Data Exchange (ETDEWEB)

    Kaichev, V. V., E-mail: vvk@catalysis.ru [Russian Academy of Sciences, Boreskov Institute of Catalysis, Siberian Branch (Russian Federation); Asanova, T. I.; Erenburg, S. B. [Russian Academy of Sciences, Institute of Inorganic Chemistry, Siberian Branch (Russian Federation); Perevalov, T. V., E-mail: timson@isp.nsc.ru [Russian Academy of Sciences, Institute of Semiconductor Physics, Siberian Branch (Russian Federation); Shvets, V. A.; Gritsenko, V. A. [Russian Academy of Sciences, Institute of Semiconductor Physics, Siberian Branch (Russian Federation)

    2013-02-15

    The chemical composition, electronic structure, structure, and physical properties a lutetium oxide Lu{sub 2}O{sub 3} film are studied by X-ray photoelectron spectroscopy, ellipsometry, and X-ray absorption spectroscopy. The short-range order in Lu{sub 2}O{sub 3} is found to correspond to its cubic modification. The binding energies of the 1s and 2p levels of oxygen and the 4d{sub 5/2} and 4f{sub 7/2} levels of lutetium are 529.2, 5.0 and 7.4, 195.9 eV, respectively. The energy gap determined from the electron energy loss spectrum of the film is 5.9 eV. The electron energy loss spectra have two peaks at 17.4 and 22.0 eV, which can be attributed to the excitation of bulk plasma oscillations. The dispersion of the refractive index is measured by spectral ellipsometry. The refractive index is shown to increase from 1.82 at 1.5 eV to 2.18 at 5.0 eV, and the high-frequency permittivity of Lu{sub 2}O{sub 3} is 3.31.

  3. Illustrations of neurosurgical techniques in early period of Ottoman Empire by Serefeddin Sabuncuoğlu.

    Science.gov (United States)

    Turgut, M

    2007-10-01

    Serefeddin Sabuncuoğlu (A.D. 1385-1468) was the author of the first illustrated surgery atlas Cerrahiyyetü'l Haniyye (Imperial Surgery), which was written in Turkish in 1465. The purpose of this report is to present his unique contribution to modern neurological surgery. Cerrahiyyetü'l Haniyye consists of 412 pages in three chapters, in which there are a total of 191 sections dealing with a variety of surgical specialties, including neurosurgery. In each section of the book, a sentence written in rhyme and meter gives the diagnosis, classification and surgical technique in detail. Serefeddin Sabuncuoğlu describes medical and surgical management of neurological diseases such as spinal trauma, epilepsy, migraine, facial palsy, hemiplegia, low back pain, cranial fracture, hydrocephalus and abscesses of the head in his textbook. Serefeddin Sabuncuoğlu was a great surgeon in Turkish medical history and the sections on neurological diseases in Cerrahiyyetü'l Haniyye are of great importance in neurosurgery. Today, he is justified as a pioneer of surgery, an investigator and a medical illustrator in the early period of Ottoman Empire. His atlas is a modification of original contributions from earlier treatises.

  4. Geochronology of the volcanic rocks in the Lu-Zong basin and its significance

    Institute of Scientific and Technical Information of China (English)

    ZHOU TaoFa; FAN Yu; YUAN Feng; LU SanMing; SHANG ShiGui; David COOKE; Sebastien MEFFRE; ZHAO GuoChun

    2008-01-01

    The Lu-Zong (Lujiang-Zongyang) basin is one of the most important volcanic basins in the middle and lower reaches of the Yangtze River area, China. It comprises four shoshonitic volcanic units, which are,in an ascending order, the Longmenyuan, Zhuanqiao, Shuangmiao and Fushan Groups. The LA-ICP MS U-Pb zircon ages of the four units are: 134.8±1.8 Ma for the Longmenyuan Group, 134.1±1.6 Ma for the Zhuanqiao Group, 130.5±0.8 Ma for the Shuangmiao Group, and 127.1+1.2 Ma for the Fushan Group. The results indicate that all volcanic rocks in the Lu-Zong basin were formed in the Early Cretaceous from about 135 Ma to 127 Ma, lasting 8-10 Ma. There were no Jurassic volcanic activities in all the volcanic basins including the Lu-Zong basin in the middle and lower reaches of the Yangtze River area.This work has provided new chronological results for the further study and understanding of the tectonic, magmatic and metallogenic processes of eastern China in the Mesozoic.

  5. An ebCMOS camera system for marine bioluminescence observation: The LuSEApher prototype

    Energy Technology Data Exchange (ETDEWEB)

    Dominjon, A., E-mail: a.dominjon@ipnl.in2p3.fr [CNRS/IN2P3, Institut de Physique Nucleaire de Lyon, Villeurbanne F-69622 (France); Ageron, M. [CNRS/IN2P3, Centre de Physique des Particules de Marseille, Marseille, F-13288 (France); Barbier, R. [CNRS/IN2P3, Institut de Physique Nucleaire de Lyon, Villeurbanne F-69622 (France); Universite de Lyon, Universite Lyon 1, Lyon F-69003 (France); Billault, M.; Brunner, J. [CNRS/IN2P3, Centre de Physique des Particules de Marseille, Marseille, F-13288 (France); Cajgfinger, T. [CNRS/IN2P3, Institut de Physique Nucleaire de Lyon, Villeurbanne F-69622 (France); Universite de Lyon, Universite Lyon 1, Lyon F-69003 (France); Calabria, P. [CNRS/IN2P3, Institut de Physique Nucleaire de Lyon, Villeurbanne F-69622 (France); Chabanat, E. [CNRS/IN2P3, Institut de Physique Nucleaire de Lyon, Villeurbanne F-69622 (France); Universite de Lyon, Universite Lyon 1, Lyon F-69003 (France); Chaize, D.; Doan, Q.T.; Guerin, C.; Houles, J.; Vagneron, L. [CNRS/IN2P3, Institut de Physique Nucleaire de Lyon, Villeurbanne F-69622 (France)

    2012-12-11

    The ebCMOS camera, called LuSEApher, is a marine bioluminescence recorder device adapted to extreme low light level. This prototype is based on the skeleton of the LUSIPHER camera system originally developed for fluorescence imaging. It has been installed at 2500 m depth off the Mediterranean shore on the site of the ANTARES neutrino telescope. The LuSEApher camera is mounted on the Instrumented Interface Module connected to the ANTARES network for environmental science purposes (European Seas Observatory Network). The LuSEApher is a self-triggered photo detection system with photon counting ability. The presentation of the device is given and its performances such as the single photon reconstruction, noise performances and trigger strategy are presented. The first recorded movies of bioluminescence are analyzed. To our knowledge, those types of events have never been obtained with such a sensitivity and such a frame rate. We believe that this camera concept could open a new window on bioluminescence studies in the deep sea.

  6. Plasticity and beyond microstructures, crystal-plasticity and phase transitions

    CERN Document Server

    Hackl, Klaus

    2014-01-01

    The book presents the latest findings in experimental plasticity, crystal plasticity, phase transitions, advanced mathematical modeling of finite plasticity and multi-scale modeling. The associated algorithmic treatment is mainly based on finite element formulations for standard (local approach) as well as for non-standard (non-local approach) continua and for pure macroscopic as well as for directly coupled two-scale boundary value problems. Applications in the area of material design/processing are covered, ranging from grain boundary effects in polycrystals and phase transitions to deep-drawing of multiphase steels by directly taking into account random microstructures.

  7. International policies to reduce plastic marine pollution from single-use plastics (plastic bags and microbeads): A review.

    Science.gov (United States)

    Xanthos, Dirk; Walker, Tony R

    2017-02-18

    Marine plastic pollution has been a growing concern for decades. Single-use plastics (plastic bags and microbeads) are a significant source of this pollution. Although research outlining environmental, social, and economic impacts of marine plastic pollution is growing, few studies have examined policy and legislative tools to reduce plastic pollution, particularly single-use plastics (plastic bags and microbeads). This paper reviews current international market-based strategies and policies to reduce plastic bags and microbeads. While policies to reduce microbeads began in 2014, interventions for plastic bags began much earlier in 1991. However, few studies have documented or measured the effectiveness of these reduction strategies. Recommendations to further reduce single-use plastic marine pollution include: (i) research to evaluate effectiveness of bans and levies to ensure policies are having positive impacts on marine environments; and (ii) education and outreach to reduce consumption of plastic bags and microbeads at source.

  8. Peculiarities of thermoelectric half-Heusler phase formation in Gd-Ni-Sb and Lu-Ni-Sb ternary systems

    Energy Technology Data Exchange (ETDEWEB)

    Romaka, V.V., E-mail: romakav@lp.edu.ua [Department of Applied Material Science and Materials Engineering, Lviv Polytechnic National University, Ustyyanovycha Str. 5, 79013 Lviv (Ukraine); Romaka, L.; Horyn, A. [Inorganic Chemistry Department, Ivan Franko Lviv National University, Kyryla and Mefodiya str. 6, 79005 Lviv (Ukraine); Rogl, P. [Institute of Materials Chemistry and Research, University of Vienna, Währingerstrasse 42, A-1090 Wien (Austria); Stadnyk, Yu; Melnychenko, N. [Inorganic Chemistry Department, Ivan Franko Lviv National University, Kyryla and Mefodiya str. 6, 79005 Lviv (Ukraine); Orlovskyy, M.; Krayovskyy, V. [Department of Applied Material Science and Materials Engineering, Lviv Polytechnic National University, Ustyyanovycha Str. 5, 79013 Lviv (Ukraine)

    2016-07-15

    The phase equilibria in the Gd–Ni–Sb and Lu-Ni-Sb ternary systems were studied at 873 K by X-ray and metallographic analyses in the whole concentration range. The interaction of the elements in the Gd–Ni–Sb system results the formation of five ternary compounds at investigated temperature: Gd{sub 5}Ni{sub 2}Sb (Mo{sub 5}SiB{sub 2}-type), Gd{sub 5}NiSb{sub 2} (Yb{sub 5}Sb{sub 3}-type), GdNiSb (MgAgAs-type), Gd{sub 3}Ni{sub 6}Sb{sub 5} (Y{sub 3}Ni{sub 6}Sb{sub 5}-type), and GdNi{sub 0.72}Sb{sub 2} (HfCuSi{sub 2}-type). At investigated temperature the Lu-Ni-Sb system is characterized by formation of the LuNiSb (MgAgAs-type), Lu{sub 5}Ni{sub 2}Sb (Mo{sub 5}SiB{sub 2}-type), and Lu{sub 5}Ni{sub 0.56}Sb{sub 2.44} (Yb{sub 5}Sb{sub 3}-type) compounds. The disordering in the crystal structure of half-Heusler GdNiSb and LuNiSb was revealed by EPMA and studied by means of Rietveld refinement and DFT modeling. The performed electronic structure calculations are in good agreement with electrical transport property studies. - Graphical abstract: Crystal structure model and electron localization function of Lu{sub 5}Ni{sub 2}Sb. Display Omitted - Highlights: • Gd-Ni-Sb and Lu-Ni-Sb phase diagrams were constructed at 873 K. • GdNiSb and LuNiSb are characterized by disordered crystal structure. • Crystal structure optimization with DFT calculations confirmed crystal structure disorder in GdNiSb and LuNiSb.

  9. Subacute haematotoxicity after PRRT with {sup 177}Lu-DOTA-octreotate: prognostic factors, incidence and course

    Energy Technology Data Exchange (ETDEWEB)

    Bergsma, Hendrik; Konijnenberg, Mark W.; Kam, Boen L.R.; Teunissen, Jaap J.M.; Kooij, Peter P.; Krenning, Eric P.; Kwekkeboom, Dik J. [Erasmus University Medical Center, Department of Nuclear Medicine, Rotterdam (Netherlands); Herder, Wouter W. de [Erasmus Medical Center, Department of Internal Medicine, Rotterdam (Netherlands); Franssen, Gaston J.H.; Eijck, Casper H.J. van [Erasmus Medical Center, Department of Surgery, Rotterdam (Netherlands)

    2016-03-15

    In peptide receptor radionuclide therapy (PRRT), the bone marrow (BM) is one of the dose-limiting organs. The accepted dose limit for BM is 2 Gy, adopted from {sup 131}I treatment. We investigated the incidence and duration of haematological toxicity and its risk factors in patients treated with PRRT with {sup 177}Lu-DOTA{sup 0}-Tyr{sup 3}-octreotate ({sup 177}Lu-DOTATATE). Also, absorbed BM dose estimates were evaluated and compared with the accepted 2 Gy dose limit. The incidence and duration of grade 3 or 4 haematological toxicity (according to CTCAE v3.0) and risk factors were analysed. Mean BM dose per unit (gigabecquerels) of administered radioactivity was calculated and the correlations between doses to the BM and haematological risk factors were determined. Haematological toxicity (grade 3/4) occurred in 34 (11 %) of 320 patients. In 15 of the 34 patients, this lasted more than 6 months or blood transfusions were required. Risk factors significantly associated with haematological toxicity were: poor renal function, white blood cell (WBC) count <4.0 x 10{sup 9}/l, age over 70 years, extensive tumour mass and high tumour uptake on the OctreoScan. Previous chemotherapy was not associated. The mean BM dose per administered activity in 23 evaluable patients was 67 ± 7 mGy/GBq, resulting in a mean BM dose of 2 Gy in patients who received four cycles of 7.4 GBq {sup 177}Lu-DOTATATE. Significant correlations between (cumulative) BM dose and platelet and WBC counts were found in a selected group of patients. The incidence of subacute haematological toxicity after PRRT with {sup 177}Lu-DOTATATE is acceptable (11 %). Patients with impaired renal function, low WBC count, extensive tumour mass, high tumour uptake on the OctreoScan and/or advanced age are more likely to develop grade 3/4 haematological toxicity. The BM dose limit of 2 Gy, adopted from {sup 131}I, seems not to be valid for PRRT with {sup 177}Lu-DOTATATE. (orig.)

  10. {sup 177}Lu-DOTMP: a viable agent for palliative radiotherapy of painful bone metastasis

    Energy Technology Data Exchange (ETDEWEB)

    Das, T.; Chakraborty, S.; Banerjee, S. [Radiopharmaceuticals Div., Bhabha Atomic Research Centre, Mumbai (India); Sarma, H.D. [Radiation Biology and Health Sciences Div., Bhabha Atomic Research Centre, Mumbai (India)

    2008-07-01

    The suitable nuclear decay characteristics [T{sub 1/2} = 6.73 d, E{sub {beta}}{sub (max)} = 497 keV, E{sub {gamma}} = 113 keV (6.4%), 208 keV (11%)] as well as the feasibility of large-scale production with adequate specific activity and radionuclidic purity using a moderate flux reactor are important attributes towards {sup 177}Lu to be considered as a promising radionuclide for palliative care in painful bone metastasis. The present study describes the preparation of {sup 177}Lu complex of 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetramethylene phosphonic acid (DOTMP) and its preliminary biological evaluation in animal models with an aim to proposing it as a viable radiopharmaceutical for bone pain palliation. The choice DOTMP as the polyaminophosphonic acid carrier ligand is based on the enhanced thermodynamic stability and kinetic inertness of the metal-ligand complexes with macrocyclic chelators. {sup 177}Lu was produced with a specific activity of {proportional_to} 12 GBq/mg ({proportional_to} 324 mCi/mg) and radionuclidic purity of 99.98% by irradiation of natural Lu{sub 2}O{sub 3} target at a thermal neutron flux of {proportional_to} 6 x 10{sup 13} n/cm{sup 2} s for 21 d. {sup 177}Lu-DOTMP complex was prepared in high yield and excellent radiochemical purity (> 99%) using DOTMP synthesized and characterized in-house. The complex exhibited excellent in-vitro stability at room temperature. Biodistribution studies in Wistar rats showed rapid skeletal accumulation of the injected activity [(1.60{+-}0.19)% per gram in femur at 3 h post-injection] with fast clearance from blood and minimal uptake in any of the major organs. Scintigraphic studies carried out in normal Wistar rats and New Zealand white rabbits also demonstrated significant accumulation of the agent in skeleton and almost no retention in any other vital organs. (orig.)

  11. Gamma camera calibration and validation for quantitative SPECT imaging with (177)Lu.

    Science.gov (United States)

    D'Arienzo, M; Cazzato, M; Cozzella, M L; Cox, M; D'Andrea, M; Fazio, A; Fenwick, A; Iaccarino, G; Johansson, L; Strigari, L; Ungania, S; De Felice, P

    2016-06-01

    Over the last years (177)Lu has received considerable attention from the clinical nuclear medicine community thanks to its wide range of applications in molecular radiotherapy, especially in peptide-receptor radionuclide therapy (PRRT). In addition to short-range beta particles, (177)Lu emits low energy gamma radiation of 113keV and 208keV that allows gamma camera quantitative imaging. Despite quantitative cancer imaging in molecular radiotherapy having been proven to be a key instrument for the assessment of therapeutic response, at present no general clinically accepted quantitative imaging protocol exists and absolute quantification studies are usually based on individual initiatives. The aim of this work was to develop and evaluate an approach to gamma camera calibration for absolute quantification in tomographic imaging with (177)Lu. We assessed the gamma camera calibration factors for a Philips IRIX and Philips AXIS gamma camera system using various reference geometries, both in air and in water. Images were corrected for the major effects that contribute to image degradation, i.e. attenuation, scatter and dead- time. We validated our method in non-reference geometry using an anthropomorphic torso phantom provided with the liver cavity uniformly filled with (177)LuCl3. Our results showed that calibration factors depend on the particular reference condition. In general, acquisitions performed with the IRIX gamma camera provided good results at 208keV, with agreement within 5% for all geometries. The use of a Jaszczak 16mL hollow sphere in water provided calibration factors capable of recovering the activity in anthropomorphic geometry within 1% for the 208keV peak, for both gamma cameras. The point source provided the poorest results, most likely because scatter and attenuation correction are not incorporated in the calibration factor. However, for both gamma cameras all geometries provided calibration factors capable of recovering the activity in

  12. Phenotypic plasticity, costs of phenotypes, and costs of plasticity

    DEFF Research Database (Denmark)

    Callahan, Hilary S; Maughan, Heather; Steiner, Uli

    2008-01-01

    Why are some traits constitutive and others inducible? The term costs often appears in work addressing this issue but may be ambiguously defined. This review distinguishes two conceptually distinct types of costs: phenotypic costs and plasticity costs. Phenotypic costs are assessed from patterns...... of covariation, typically between a focal trait and a separate trait relevant to fitness. Plasticity costs, separable from phenotypic costs, are gauged by comparing the fitness of genotypes with equivalent phenotypes within two environments but differing in plasticity and fitness. Subtleties associated with both...... types of costs are illustrated by a body of work addressing predator-induced plasticity. Such subtleties, and potential interplay between the two types of costs, have also been addressed, often in studies involving genetic model organisms. In some instances, investigators have pinpointed the mechanistic...

  13. Biodegradable plastics from renewable sources.

    Science.gov (United States)

    Flieger, M; Kantorová, M; Prell, A; Rezanka, T; Votruba, J

    2003-01-01

    Plastic waste disposal is a huge ecotechnological problem and one of the approaches to solving this problem is the development of biodegradable plastics. This review summarizes data on their use, biodegradability, commercial reliability and production from renewable resources. Some commercially successful biodegradable plastics are based on chemical synthesis (i.e. polyglycolic acid, polylactic acid, polycaprolactone, and polyvinyl alcohol). Others are products of microbial fermentations (i.e. polyesters and neutral polysaccharides) or are prepared from chemically modified natural products (e.g., starch, cellulose, chitin or soy protein).

  14. Plastics recycling: challenges and opportunities

    OpenAIRE

    Hopewell, Jefferson; Dvorak, Robert; Kosior, Edward

    2009-01-01

    Plastics are inexpensive, lightweight and durable materials, which can readily be moulded into a variety of products that find use in a wide range of applications. As a consequence, the production of plastics has increased markedly over the last 60 years. However, current levels of their usage and disposal generate several environmental problems. Around 4 per cent of world oil and gas production, a non-renewable resource, is used as feedstock for plastics and a further 3–4% is expended to pro...

  15. Circadian Regulation of Synaptic Plasticity

    Directory of Open Access Journals (Sweden)

    Marcos G. Frank

    2016-07-01

    Full Text Available Circadian rhythms refer to oscillations in biological processes with a period of approximately 24 h. In addition to the sleep/wake cycle, there are circadian rhythms in metabolism, body temperature, hormone output, organ function and gene expression. There is also evidence of circadian rhythms in synaptic plasticity, in some cases driven by a master central clock and in other cases by peripheral clocks. In this article, I review the evidence for circadian influences on synaptic plasticity. I also discuss ways to disentangle the effects of brain state and rhythms on synaptic plasticity.

  16. PLASMA GASIFICATION OF WASTE PLASTICS

    Directory of Open Access Journals (Sweden)

    Tadeusz Mączka

    2013-01-01

    Full Text Available The article presents the process of obtaining liquid fuels and fuel gas in the process of plasma processing of organic materials, including waste plastics. The concept of plasma pyrolysis of plastics was presented and on its basis a prototype installation was developed. The article describes a general rule of operating the installation and its elements in the process and basic operation parameters determined during its start-up. Initial results of processing plastics and the directions further investigations are also discussed. The effect of the research is to be the design of effective technology of obtaining fuels from gasification/pyrolysis of organic waste and biomass.

  17. Recycling of Reinforced Plastics

    Science.gov (United States)

    Adams, R. D.; Collins, Andrew; Cooper, Duncan; Wingfield-Digby, Mark; Watts-Farmer, Archibald; Laurence, Anna; Patel, Kayur; Stevens, Mark; Watkins, Rhodri

    2014-02-01

    This work has shown is that it is possible to recycle continuous and short fibre reinforced thermosetting resins while keeping almost the whole of the original material, both fibres and matrix, within the recyclate. By splitting, crushing hot or cold, and hot forming, it is possible to create a recyclable material, which we designate a Remat, which can then be used to remanufacture other shapes, examples of plates and tubes being demonstrated. Not only can remanufacturing be done, but it has been shown that over 50 % of the original mechanical properties, such as the E modulus, tensile strength, and interlaminar shear strength, can be retained. Four different forms of composite were investigated, a random mat Glass Fibre Reinforced Plastic (GFRP) bathroom component and boat hull, woven glass and carbon fibre cloth impregnated with an epoxy resin, and unidirectional carbon fibre pre-preg. One of the main factors found to affect composite recyclability was the type of resin matrix used in the composite. Thermoset resins tested were shown to have a temperature range around the Glass Transition Temperature (Tg) where they exhibit ductile behaviour, hence aiding reforming of the material. The high-grade carbon fibre prepreg was found to be less easy to recycle than the woven of random fibre laminates. One method of remanufacturing was by heating the Remat to above its glass transition temperature, bending it to shape, and then cooling it. However, unless precautions are taken, the geometric form may revert. This does not happen with the crushed material.

  18. Promise and Pitfalls of Lu/Hf-Sm/Nd Garnet Geochronology

    Science.gov (United States)

    King, R. L.; Vervoort, J. D.; Kohn, M. J.; Zirakparvar, N. A.; Hart, G. L.; Corrie, S. L.; Cheng, H.

    2007-12-01

    Our ability to routinely measure Lu-Hf and Sm-Nd isotopes in garnet allows broad new applications in geochronology, petrology, and tectonics. However, applications of these data can be limited by challenges in interpreting the petrologic record and preparing garnets for analysis. Here, we examine petrologic and chemical pitfalls encountered in garnet geochronology. Petrologic factors influencing trace element compositions in garnet include reactions that modify REE availability and partitioning (1,2), kinetically limited transfer of REEs to garnet (3), and bulk compositional heterogeneities (4). Interpreting the effects of these processes on Sm/Nd and Lu/Hf ages requires characterizing REE zonation prior to isotope analysis and age interpretation. Because garnet fractions are traditionally picked from crushed samples without regard to intracrystalline origins or chemistries, isochrons will represent mixtures derived to varying degrees from all periods of garnet growth. While measured zoning might generally indicate what garnet portion dominates the Lu/Hf or Sm/Nd budget, traditional mineral separation will rarely realize the chronologic potential afforded by high precision Hf and Nd isotope measurements. The potential use of alternative techniques, such as microsampling, necessitates selective digestion and/or leaching to eliminate inclusions within garnet. For Sm/Nd geochronology, H2SO4 leaching removes LREE-rich phosphates (e.g. apatite), but not silicates (e.g. epidote), precluding Sm-Nd dating of some rocks. For Lu/Hf geochronology, ubiquitous zircon microinclusions (c. 1 μm) can significantly disrupt age determinations. Microinclusions cannot be detected optically or separated physically, requiring selective chemical digestion. If complete digestion methods, such as bomb digestion, are used for garnet fractions, then "common Hf" from zircon will be contained in final solutions. These mixed analyses are of dubious utility and will fall into one of two

  19. Afnám einkasölu áfengis. Yfirlit yfir rannsóknir á breytingum á áfengissölu

    Directory of Open Access Journals (Sweden)

    Hildigunnur Ólafsdóttir

    2007-12-01

    Full Text Available Í skýrslunni er gerð grein fyrir helstu rannsóknum sem gerðar hafa verið á breytingum á áfengiseinkasölu og aðgengi áfengis. Rannsóknir á breyttu fyrirkomulagi áfengissölu eru flestar frá Norður-Ameríku og Norðurlöndunum. Nær allar rannsóknirnar sýna að í kjölfar einkavæðingar á áfengissölu hefur áfengisneysla aukist. Ennfremur er greint frá rannsóknum á breytingum á áfengissköttum, sem leiða í ljós að lækkun þeirra eykur áfengisneyslu og tjón af völdum áfengis. Stuttlega er fjallað um rannsóknir á áfengiskaupaaldri, á reglum um áfengisauglýsingar og viðvörunarmerkingar á áfengi. Til þess að setja þessa þætti áfengisstefnunnar í víðara samhengi er gerð grein fyrir norrænu samstarfi um áfengismál á alþjóðlegum vettvangi og stöðu áfengismála hjá Alþjóðaheilbrigðismálastofnuninni og Evrópusambandinu. Greint er frá því að innan Alþjóðaheilbrigðismálastofnunarinnar er stefnt að samþykkt um áfengismál, sem verði baráttutæki gegn áfengisvandamálum. Þá er sagt frá stefnuskjali Evrópusambandsins og stofnun The European Alcohol and Health Forum, sem innan tíðar mun leggja fram aðgerðaáætlun til þess að vernda íbúa Evrópu gegn skaðlegri neyslu áfengis.

  20. Synthesis of oligosaccharides derived from lactulose (OsLu using soluble and immobilized Aspergillus oryzae b-galactosidase

    Directory of Open Access Journals (Sweden)

    ALEJANDRA eCARDELLE COBAS

    2016-03-01

    Full Text Available b-galactosidase from Aspergillus oryzae offers a high yield for the synthesis of oligosaccharides derived from lactulose (OsLu by transgalactosylation. Oligosaccharides with degree of polymerization (DP ≥ 3 have shown to possess higher in vitro bifidogenic effect than di- and tetrasaccharides. Thus, in this work, an optimization of reaction conditions affecting the specific selectivity of A. oryzae b-galactosidase for synthesis of OsLu has been carried out to enhance OsLu with DP ≥ 3 production. Assays with b-galactosidase immobilized onto a glutaraldehyde-agarose support were also carried out with the aim of making the process cost-effective and industrially viable. Optimal conditions with both soluble and immobilized enzyme for the synthesis of OsLu with DP ≥ 3 were 50 °C, pH 6.5, 450 g/L of lactulose and 8 U/mL of enzyme, reaching yields of ca. 50% (w/v of total OsLu and ca. 20% (w/v of OsLu-3, being 6′-galactosyl-lactulose the major one, after a short reaction time. Selective formation of disaccharides, however, was favored at 60 °C, pH 4.5, 450 g/L of lactulose and 8 U/mL of enzyme. Immobilization increased the enzymatic stability to temperature changes and allowed to reuse the enzyme. We can conclude that the use, under determined optimal conditions, of the A. oryzae b-galactosidase immobilized on a support of glutaraldehyde-agarose constitutes an efficient and cost-effective alternative to the use of soluble b-galactosidases for the synthesis of prebiotic OsLu mixtures.

  1. Plasticity and creep of metals

    CERN Document Server

    Rusinko, Andrew

    2011-01-01

    Here is a systematic presentation of the postulates, theorems and principles of mathematical theories of plasticity and creep in metals, and their applications. Special attention is paid to analysis of the advantages and shortcomings of the classical theories.

  2. American Society of Plastic Surgeons

    Science.gov (United States)

    ... PRS PRS GO PSN PSEN GRAFT Contact Us Cosmetic Surgery New procedures and advanced technologies offer plastic surgery ... David Berman MD 14 Pidgeon Hill Drive Berman Cosmetic Surgery & S... Sterling, VA 20165 Website Franklin Richards MD Suite ...

  3. Plastic deformation of nanocrystalline nickel

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    A high-resolution electron microscopy study has uncovered the plastic behavior of accommodating large strains in nanocrystalline (NC) Ni subject to cold rolling at liquid nitrogen temperature. The activation of grain-boundary-mediated-plasticity is evidenced in NC-Ni, including twinning and formation of stacking fault via partial dislocation slips from the grain boundary. The formation and storage of 60? full dislocations are observed inside NC-grains. The grain/twin boundaries act as the barriers of dislocation slips, leading to dislocation pile-up, severe lattice distortion, and formation of sub-grain boundary. The vicinity of grain/twin boundary is where defects preferentially accumulate and likely the favorable place for onset of plastic deformation. The present results indicate the heterogeneous and multiple natures of accommodating plastic strains in NC-grains.

  4. Plastic deformation of nanocrystalline nickel

    Institute of Scientific and Technical Information of China (English)

    WU XiaoLei

    2009-01-01

    A high-resolution electron microscopy study has uncovered the plastic behavior of accommodating large strains in nanocrystalline(NC)Ni subject to cold rolling at liquid nitrogen temperature.The acti vation of grain-boundary-mediated-plasticity is evidenced in NC-Ni,including twinning and formation of stacking fault via partial dislocation slips from the grain boundary.The formation and storage of 60° full dislocations are observed inside NC-grains.The grain/twin boundaries act as the barriers of dislocation slips,leading to dislocation pile-up,severe lattice distortion,and formation of sub-grain boundary.The vicinity of grain/twin boundary is where defects preferentially accumulate and likely the favorable place for onset of plastic deformation.The present results indicate the heterogeneous and multiple natures of accommodating plastic strains in NC-grains.

  5. Exceptional plasticity of silicon nanobridges

    Energy Technology Data Exchange (ETDEWEB)

    Ishida, Tadashi; Sato, Takaaki; Toshiyoshi, Hiroshi; Collard, Dominique; Fujita, Hiroyuki [University of Tokyo, Institute of Industrial Science, 4-6-1 Komaba Meguro, Tokyo 153-8505 (Japan); Cleri, Fabrizio [Institut d' Electronique Microelectronique et Nanotechnologie (CNRS UMR 8520), Universite de Lille I, Avenue Poincare BP60069 59652 Villeneuve d' Ascq (France); Kakushima, Kuniyuki [Tokyo Institute of Technology, 4259, Nagatsuda, Midori, Yokohama, Kanagawa 226-8502 (Japan); Mita, Makoto [Department of Spacecraft Engineering, Japan Aerospace Exploration Agency, 3-1-1, Yoshinodai, Sagamihara, Kanagawa 229-8510 (Japan); Miyata, Masaki; Itamura, Noriaki; Sasaki, Naruo [Department of Materials and Life Sciences, Seikei University, 3-3-1, Kitamachi, Kichijoji, Musashino, Tokyo 180-8633 (Japan); Endo, Junji, E-mail: tadashii@iis.u-tokyo.ac.jp [FK Optical laboratory, 1-13-4 Nakano Niiza Saitama, 352-0005 (Japan)

    2011-09-02

    The plasticity of covalently bonded materials is a subject at the forefront of materials science, bearing on a wide range of technological and fundamental aspects. However, covalent materials fracture in a brittle manner when the deformation exceeds just a few per cent. It is predicted that a macroscopically brittle material like silicon can show nanoscale plasticity. Here we report the exceptional plasticity observed in silicon nanocontacts ('nanobridges') at room temperature using a special experimental setup combining a transmission electron microscope and a microelectromechanical system. When accounting for surface diffusion, we succeeded in elongating the nanocontact into a wire-like structure, with a fivefold increase in volume, up to more than twenty times the original length. Such a large plasticity was caused by the stress-assisted diffusion and the sliding of the intergranular, amorphous-like material among the nanocrystals.

  6. Globally Oriented Chinese Plastics Industry

    Institute of Scientific and Technical Information of China (English)

    Liao Zhengpin

    2004-01-01

    @@ Through continued endeavor and persistent opening to the whole world the Chinese plastics industry has been developed into a comprehensive industrial system that forms the basic material industries side by side with the steel, cement and the timber industry.

  7. 177Lu-DOTA-HH1, a Novel Anti-CD37 Radio-Immunoconjugate: A Study of Toxicity in Nude Mice

    Science.gov (United States)

    Repetto-Llamazares, Ada H. V.; Larsen, Roy H.; Giusti, Anna Maria; Riccardi, Elena; Bruland, Øyvind S.; Selbo, Pål Kristian; Dahle, Jostein

    2014-01-01

    Background CD37 is an internalizing B-cell antigen expressed on Non-Hodgkin lymphoma (NHL) and chronic lymphocytic leukemia cells (CLL). The anti-CD37 monoclonal antibody HH1 was conjugated to the bifunctional chelator p-SCN-Bn-DOTA and labelled with the beta-particle emitting radionuclide 177Lu creating the radio-immunoconjugate (RIC) 177Lu-DOTA-HH1 (177Lu-HH1, trade name Betalutin). The present toxicity study was performed prior to initiation of clinical studieswith 177Lu-HH1. Methodology/Principal Findings Nude mice with or without tumor xenografts were treated with 50 to 1000 MBq/kg 177Lu- HH1 and followed for clinical signs of toxicity up to ten months. Acute, life threatening bone marrow toxicity was observed in animals receiving 800 and 1000 MBq/kg 177Lu-HH1. Significant changes in serum concentrations of liver enzymes were evident for treatment with 1000 MBq/kg 177Lu-HH1. Lymphoid depletion, liver necrosis and atrophy, and interstitial cell hyperplasia of the ovaries were also observed for mice in this dose group. Conclusions/Significance 177Lu-DOTA-HH1 was well tolerated at dosages about 10 times above those considered relevant for radioimmunotherapy in patients with B-cell derived malignancies.The toxicity profile was as expected for RICs. Our experimental results have paved the way for clinical evaluation of 177Lu-HH1 in NHL patients. PMID:25068508

  8. 177Lu-DOTA-HH1, a novel anti-CD37 radio-immunoconjugate: a study of toxicity in nude mice.

    Directory of Open Access Journals (Sweden)

    Ada H V Repetto-Llamazares

    Full Text Available CD37 is an internalizing B-cell antigen expressed on Non-Hodgkin lymphoma (NHL and chronic lymphocytic leukemia cells (CLL. The anti-CD37 monoclonal antibody HH1 was conjugated to the bifunctional chelator p-SCN-Bn-DOTA and labelled with the beta-particle emitting radionuclide 177Lu creating the radio-immunoconjugate (RIC 177Lu-DOTA-HH1 (177Lu-HH1, trade name Betalutin. The present toxicity study was performed prior to initiation of clinical studies with 177Lu-HH1.Nude mice with or without tumor xenografts were treated with 50 to 1000 MBq/kg 177Lu- HH1 and followed for clinical signs of toxicity up to ten months. Acute, life threatening bone marrow toxicity was observed in animals receiving 800 and 1000 MBq/kg 177Lu-HH1. Significant changes in serum concentrations of liver enzymes were evident for treatment with 1000 MBq/kg 177Lu-HH1. Lymphoid depletion, liver necrosis and atrophy, and interstitial cell hyperplasia of the ovaries were also observed for mice in this dose group.177Lu-DOTA-HH1 was well tolerated at dosages about 10 times above those considered relevant for radioimmunotherapy in patients with B-cell derived malignancies.The toxicity profile was as expected for RICs. Our experimental results have paved the way for clinical evaluation of 177Lu-HH1 in NHL patients.

  9. Computational materials science: Nanoscale plasticity

    DEFF Research Database (Denmark)

    Jacobsen, Karsten Wedel; Schiøtz, Jakob

    2002-01-01

    How does plastic deformation of polycrystalline materials with grain sizes less than 100 nm look at the atomic scale? A large-scale molecular dynamics simulation of nanocrystalline alluminium reveals some surprising behaviour.......How does plastic deformation of polycrystalline materials with grain sizes less than 100 nm look at the atomic scale? A large-scale molecular dynamics simulation of nanocrystalline alluminium reveals some surprising behaviour....

  10. Sorting Techniques for Plastics Recycling

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    This paper presents the basic principles of three different types of separating methods and a general guideline for choosing the most effective method for sorting plastic mixtures. It also presents the results of the tests carried out for separation of PVC, ABS and PET from different kinds of plastic mixtures in order to improve the grade of the raw input used in mechanical or feedstock recycling.

  11. [Modern neuroimaging of brain plasticity].

    Science.gov (United States)

    Kasprian, G; Seidel, S

    2010-02-01

    Modern neuroimaging methods offer new insights into the plasticity of the human brain. As the techniques of functional MRI and diffusion tensor imaging are increasingly being applied in a clinical setting, the examiner is now frequently confronted with the interpretation of imaging findings related to regenerative processes in response to lesions of the central and also of the peripheral nervous system. In this article individual results of modern neuroimaging studies are discussed in the context of structural and functional plasticity of the CNS.

  12. Plastic bronchitis: a management challenge.

    Science.gov (United States)

    Eberlein, Michael H; Drummond, Michael B; Haponik, Edward F

    2008-02-01

    Plastic bronchitis is an uncommon and underdiagnosed entity, characterized by recurrent expectoration of large, branching bronchial casts. We describe a 39-year-woman with no prior lung disease who had episodic wheezing, severe dyspnea with expectoration of large and thick secretions, branching in appearance, which she described as resembling squid. A comprehensive evaluation revealed no specific cause and a diagnosis of idiopathic plastic bronchitis was made. In plastic bronchitis the bronchial casts may vary in size from small segmental casts of a bronchus to casts filling the airways of an entire lung. Plastic bronchitis can therefore present as an acute life-threatening emergency if mechanical obstruction of major airways occurs. The casts are differentiated into type I, inflammatory casts, or type II, acellular casts. The type I inflammatory casts are often associated with bronchial disease and often have an acute presentation. The acellular type of cast production is often chronic or recurrent. Numerous systemic illnesses are associated with plastic bronchitis, but often, as in our patient, no underlying cause can be identified. The treatment of plastic bronchitis includes acute therapy to aid the removal and expectoration of casts, and specific short- or long-term treatments attempting to address the underlying hypersecretory process. The therapeutic options are supported only by anecdotal evidence based on case reports as the rarity and heterogeneity of plastic bronchitis confounds systematic investigations of its treatment. Improved understanding of the regulation of mucus production may allow for new treatment options in plastic bronchitis and other chronic lung diseases characterized by hypersecretion of mucus.

  13. ARE PLASTIC GROCERY BAGS SACKING THE ENVIRONMENT?

    OpenAIRE

    Mangal Gogte

    2009-01-01

    This paper is oriented on analysis impacts of plastic bags on environment. In this paper is analyzed did plastic bags are so harmful, and what are the main ingredients of it. One part of this paper is oriented on effects of plastic bags and management of their usage. There is also made comparative analysis between impacts of plastic and paper bags on environment.

  14. Experiments with elasto-plastic oscillator

    DEFF Research Database (Denmark)

    Randrup-thomsen, Søren; Ditlevsen, Ove Dalager

    1996-01-01

    Plastic displacements of a Gaussian white noise excited three degrees of freedom non-ideal elasto-plastic oscillator are measured in laboratory experiments and the plastic displacements are compared to computer simulated results for the corresponding ideal elasto-plastic oscillator. The comparative...

  15. Experiments with elasto-plastic oscillator

    DEFF Research Database (Denmark)

    Randrup-Thomsen, S.; Ditlevsen, Ove Dalager

    1999-01-01

    Plastic displacements of a Gaussian white noise excited three degrees of freedom non-ideal elasto-plastic oscillator are measured in laboratory experiments and the plastic displacements are compared to computer simulated results for the corresponding ideal elasto-plastic oscillator. The comparative...

  16. 49 CFR 192.281 - Plastic pipe.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 3 2010-10-01 2010-10-01 false Plastic pipe. 192.281 Section 192.281... Plastic pipe. (a) General. A plastic pipe joint that is joined by solvent cement, adhesive, or heat fusion may not be disturbed until it has properly set. Plastic pipe may not be joined by a threaded joint...

  17. 49 CFR 192.59 - Plastic pipe.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 3 2010-10-01 2010-10-01 false Plastic pipe. 192.59 Section 192.59 Transportation... BY PIPELINE: MINIMUM FEDERAL SAFETY STANDARDS Materials § 192.59 Plastic pipe. (a) New plastic pipe... specification; and (2) It is resistant to chemicals with which contact may be anticipated. (b) Used plastic...

  18. The Story of the Plastics Industry.

    Science.gov (United States)

    Masson, Don, Ed.

    This is an illustrated informative booklet, designed to serve members of the Society of the Plastics Industry, Inc., and the plastics industry as a whole. It provides basic information about the industry's history and growth, plastics raw materials, typical uses of plastics, properties, and methods of processing and fabricating. (Author/DS)

  19. WOMEN’S PROBLEMATIC AT NOVELS BY AFET (MUHTEREMOĞLU ILGAZ AFET (MUHTEREMOĞLU ILGAZ’IN ROMANLARINDA KADIN SORUNSALI

    Directory of Open Access Journals (Sweden)

    Zehra YAZBAHAR

    2011-06-01

    Full Text Available From Tanzimat to Rebuclic, women were examined in various aspects by very important part of Turkish novelists. Women's place in society by men and women in second place among the questions the writers of Afet (Muhteremoğlu Ilgaz also mention the name.In this study, classified in terms of subject Afet Ilgaz’s novels after a brief introduction and overview of feminist discourse with the struggle for independence, the author traces of her novels had been discussed Tanzimat’tan Cumhuriyet dönemine kadar kadın konusu, çeşitli yönleriyle, Türk romancılarının önemli bir kısmı tarafından ele anılıp, incelenmiştir. Kadının toplum içindeki yerini ve kadının erkeğe göre ikinciliğini sorgulayan yazarlar arasında Afet (Muhteremoğlu Ilgaz’ın da ismi sayılabilir. Bu çalışmada, Afet Ilgaz’ın romanlarını konu bakımından sınıflandıran kısa bir girişten sonra yazarın romanlarında kadına bakış ve feminist söylemin izleri ile bağımsızlık ve varoluş mücadelesi ele alınmaya çalışıldı.

  20. Deformation mechanisms of plasticized starch materials.

    Science.gov (United States)

    Mikus, P-Y; Alix, S; Soulestin, J; Lacrampe, M F; Krawczak, P; Coqueret, X; Dole, P

    2014-12-19

    The aim of this paper is to understand the influence of plasticizer and plasticizer amount on the mechanical and deformation behaviors of plasticized starch. Glycerol, sorbitol and mannitol have been used as plasticizers. After extrusion of the various samples, dynamic mechanical analyses and video-controlled tensile tests have been performed. It was found that the nature of plasticizer, its amount as well as the aging of the material has an impact on the involved deformation mechanism. The variations of volume deformation could be explained by an antiplasticization effect (low plasticizer amount), a phase-separation phenomenon (excess of plasticizer) and/or by the retrogradation of starch.

  1. Evolution of phenotypic plasticity in colonizing species.

    Science.gov (United States)

    Lande, Russell

    2015-05-01

    I elaborate an hypothesis to explain inconsistent empirical findings comparing phenotypic plasticity in colonizing populations or species with plasticity from their native or ancestral range. Quantitative genetic theory on the evolution of plasticity reveals that colonization of a novel environment can cause a transient increase in plasticity: a rapid initial increase in plasticity accelerates evolution of a new optimal phenotype, followed by slow genetic assimilation of the new phenotype and reduction of plasticity. An association of colonization with increased plasticity depends on the difference in the optimal phenotype between ancestral and colonized environments, the difference in mean, variance and predictability of the environment, the cost of plasticity, and the time elapsed since colonization. The relative importance of these parameters depends on whether a phenotypic character develops by one-shot plasticity to a constant adult phenotype or by labile plasticity involving continuous and reversible development throughout adult life. © 2014 John Wiley & Sons Ltd.

  2. Lu Xun's Essays and Customs of Shaoxing%鲁迅杂文与绍兴习俗

    Institute of Scientific and Technical Information of China (English)

    赵献涛

    2012-01-01

    Lu Xun's essays and Shaoxing customs are closely linked. The life in such folk spirit touched, influenced Lu Xun and raised his characteristics. The personality flow in the art atmosphere and its of Lu Xun's essays, forming a different type of essay, a steady wildness. The wildness of Lu Xun's essays is the formation of Shaoxing customs which brought the result of Lu Xun's personality.%鲁迅杂文与绍兴生活民俗存在着密切联系。鲁迅自幼生活于其间的民间习俗氛围以及它所蕴涵的精神触动着、影响着鲁迅,并养育了他的个性。这种个性气质流淌在鲁迅杂文的艺术园地里,形成一种与众不同的杂文意蕴,即一种泼辣辣的野气。鲁迅杂文所张扬着的野气的形成是绍兴民间习俗所养育的鲁迅个性的必然结果。

  3. Fabrication, microstructure and luminescence properties of Cr3+ doped Lu3A15O12 red scintillator ceramics

    Science.gov (United States)

    Shi, Yun; Zhao, Yu; Liu, Qiang; Cao, Maoqing; Ma, Peng; Chen, Haohong; Liu, Qian; Li, Jiang

    2017-04-01

    Cr3+ doped Lu3A15O12 transparent ceramics were developed as a new red scintillator ceramics. These ceramics were fabricated by a solid state reaction method under vacuum sintering at temperature range of 1550 °C-1890 °C for 10 h. The doping effect of different Cr3+ concentration (0, 0.1, 0.3 and 0.5 at. %) and air annealing effect were investigated as well. The transparent ceramics (70% @1 mm in visible light range) with dense microstructure were obtained when sintered at 1890 °C for 10 h, the average grain size of 0.3 at.% Cr:LuAG was calculated to be 7 μm. Photo-luminescence spectra revealed that there are two typical excitation bands at around 450 nm and 600 nm which were ascribed to the d-d transitions of Cr3+. 0.3 at. % Cr:LuAG exhibited the optimum photoluminescence intensity and fast decay. Radio-luminescence under X-ray excitation indicated a characteristic Cr3+ emission peaking at 687 nm and 706 nm respectively. The Lu3+Al antisite defects related emission at around 300 nm was observed to decrease with the doping of Cr3+. The steady luminescence efficiency (XEL spectrum integral) is around 20 times of the commercial BGO crystals, more important, the broad and continuous red emission between 600 nm and 800 nm demonstrated Cr:LuAG ceramics a prospective application as new red scintillators.

  4. 鲁迅民俗观形成的历史考察%Historical Study of Lu Xun's Folklore Viewpoints

    Institute of Scientific and Technical Information of China (English)

    赵献涛

    2012-01-01

    鲁迅民俗观的形成,主要与国外人类学派民俗观、中国现代民俗学运动的影响有关。与借民俗以研究历史或表达人生情趣不同,鲁迅的民俗观是一种启蒙致用的民俗观,但其部分观念并没有超出同时代的其他人物。人类学派民俗观与中国现代民俗学运动,成就了鲁迅的民俗视野,但同时也弱化了鲁迅的思想。%Formation of Lu Xun's folklore viewpoints closely associated with the foreign anthropology folklore viewpoints and modern folklore movement of China.Being different from studying the history and expressing life interest through the folklore,Lu Xun's folklore viewpoints was a kind of practical enlightenment.But some ideas of Lu Xun's folklore viewpoints do not go beyond other contemporary folklorists.Lu Xun's folklore viewpoints were formed by the foreign anthropology folklore viewpoints and the modern folklore movement of China,and to some extent Lu Xun's thoughts were weakened by them too.

  5. The locus for apolipoprotein E (apoE) is close to the Lutheran (Lu) blood group locus on chromosome 19.

    Science.gov (United States)

    Gedde-Dahl, T; Olaisen, B; Teisberg, P; Wilhelmy, M C; Mevåg, B; Helland, R

    1984-01-01

    Linkage has been described between the loci for apolipoprotein E (apoE) and the complement C3 (C3) on chromosome 19. C3 is known to belong to a linkage group with gene order C3-Se-Lu. The present study revealed linkage between Se and apoE with peak lod score +3.3 at recombination fraction 0.08 in males and +1.36 at 0.22 in females, and linkage between apoE and Lu with lod score +4.52 at zero recombination in sexes combined. The C3-apoE linkage gives lod score +4.00 at theta = 0.18 in males, but +0.04 at theta = 0.45 in females. Triple heterozygote families confirm that apoE is on the Se side and on the Lu side of C3. Allelic association between apoE and Lu has not been ruled out. Combining our data with published data on C3-Se and Se-Lu, this segment of chromosome 19 has an average age sex ratio of female/male recombination of 2.3.

  6. Crystal growth and optical properties of Gd admixed Ce-doepd Lu2Si2O7 single crystals

    Science.gov (United States)

    Horiai, Takahiko; Kurosawa, Shunsuke; Murakami, Rikito; Yamaji, Akihiro; Shoji, Yasuhiro; Ohashi, Yuji; Pejchal, Jan; Kamada, Kei; Yokota, Yuui; Yoshikawa, Akira

    2017-06-01

    Ce-doped Lu2Si2O7 scintillator contains radioactive isotope 176Lu which causes an unwanted intrinsic background signal. The development of scintillators with reduced Lu concentration were required in some applications. In this study, we developed the Gd admixed lutetium pyrosilicate, where the average ion radius at the rare earth site was similar to the Tm3+ ion radius, for which the RE2Si2O7 (RE=Tm, Yb, Lu) crystal structure is stable from room temperature to melting point. We have grown (Cex Lu1-x-y Gdy)2Si2O7 (x=0.01, y=0.00, 0.05, 0.10) single crystals. Their crystal systems were monoclinic with a space group C2/m. The absorption spectra revealed the energy transitions in Ce and Gd ions might be occurred. The light output was degraded and decay time was accelerated comparing the Gd 5% admixed sample with the Gd 10% one.

  7. On the structural origin of the single-ion magnetic anisotropy in LuFeO 3

    Energy Technology Data Exchange (ETDEWEB)

    Cao, Shi; Zhang, Xiaozhe; Paudel, Tula R.; Sinha, Kishan; Wang, Xiao; Jiang, Xuanyuan; Wang, Wenbin; Brutsche, Stuart; Wang, Jian; Ryan, Philip J.; Kim, Jong-Woo; Cheng, Xuemei; Tsymbal, Evgeny Y.; Dowben, Peter A.; Xu, Xiaoshan

    2016-03-16

    The electronic structure for the conduction bands of both hexagonal and orthorhombic LuFeO3 thin films have been measured using x-ray absorption spectroscopy at oxygen K (O K) edge. Dramatic differences in both the spectral features and the linear dichroism are observed. These differences in the spectra can be explained using the differences in crystal field splitting of the metal (Fe and Lu) electronic states and the differences in O 2p-Fe 3d and O 2p-Lu 5d hybridizations. While the oxidation states have not changed, the spectra are sensitive to the changes in the local environments of the Fe3+ and Lu3+ sites in the hexagonal and orthorhombic structures. Using the crystal-field splitting and the hybridizations that are extracted from the measured electronic structures and the structural distortion information, we derived the occupancies of the spin minority states in Fe3+, which are non-zero and uneven. The single ion anisotropy on Fe3+ sites is found to originate from these uneven occupancies of the spin minority states via spin–orbit coupling in LuFeO3.

  8. Time over threshold based multi-channel LuAG-APD PET detector

    Science.gov (United States)

    Shimazoe, Kenji; Orita, Tadashi; Nakamura, Yasuaki; Takahashi, Hiroyuki

    2013-12-01

    To achieve efficient signal processing, several time-based positron emission tomography (PET) systems using a large number of granulated gamma-ray detectors have recently been proposed. In this work described here, a 144-channel Pr:LuAG avalanche photodiode (APD) PET detector that uses time over threshold (ToT) and pulse train methods was designed and fabricated. The detector is composed of 12×12 Pr:LuAG crystals, each of which produces a 2 mm×2 mm×10 mm pixel individually coupled to a 12×12 APD array, which in turn is connected pixel-by-pixel with one channel of a time over threshold based application-specific integrated circuit (ToT-ASIC) that was designed and fabricated using a 0.25 μm 3.3 V Taiwan Semiconductor Company complementary metal oxide semiconductor (TSMC CMOS) process. The ToT outputs are connected through a field-programmable gate array (FPGA) to a data acquisition (DAQ) system. Three front-end ASIC boards-each incorporating a ToT-ASIC chip, threshold control digital-to-analog converters (DACs), and connectors, and dissipating power at about 230 mW per board-are used to read from the 144-channel LuAG-APD detector. All three boards are connected through an FPGA board that is programmed to calibrate the individual thresholds of the ToT circuits to allow digital multiplexing to form an integrated PET module with a measured timing resolution of 4.2 ns. Images transmitted by this PET system can be successfully acquired through collimation masks. As a further implementation of this technology, an animal PET system consisting of eight gamma pixel modules forming a ring is planned.

  9. Time over threshold based multi-channel LuAG-APD PET detector

    Energy Technology Data Exchange (ETDEWEB)

    Shimazoe, Kenji, E-mail: shimazoe@it-club.jp [Department of Nuclear Engineering and Management, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan); Orita, Tadashi [Department of Nuclear Engineering and Management, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan); Nakamura, Yasuaki [Department of Bioengineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan); Takahashi, Hiroyuki [Department of Nuclear Engineering and Management, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan); Department of Bioengineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan)

    2013-12-11

    To achieve efficient signal processing, several time-based positron emission tomography (PET) systems using a large number of granulated gamma-ray detectors have recently been proposed. In this work described here, a 144-channel Pr:LuAG avalanche photodiode (APD) PET detector that uses time over threshold (ToT) and pulse train methods was designed and fabricated. The detector is composed of 12×12 Pr:LuAG crystals, each of which produces a 2 mm×2 mm×10 mm pixel individually coupled to a 12×12 APD array, which in turn is connected pixel-by-pixel with one channel of a time over threshold based application-specific integrated circuit (ToT-ASIC) that was designed and fabricated using a 0.25 μm 3.3 V Taiwan Semiconductor Company complementary metal oxide semiconductor (TSMC CMOS) process. The ToT outputs are connected through a field-programmable gate array (FPGA) to a data acquisition (DAQ) system. Three front-end ASIC boards—each incorporating a ToT-ASIC chip, threshold control digital-to-analog converters (DACs), and connectors, and dissipating power at about 230 mW per board—are used to read from the 144-channel LuAG-APD detector. All three boards are connected through an FPGA board that is programmed to calibrate the individual thresholds of the ToT circuits to allow digital multiplexing to form an integrated PET module with a measured timing resolution of 4.2 ns. Images transmitted by this PET system can be successfully acquired through collimation masks. As a further implementation of this technology, an animal PET system consisting of eight gamma pixel modules forming a ring is planned.

  10. 卢作孚的伦理管理%Ethical Management of Lu Zuofu

    Institute of Scientific and Technical Information of China (English)

    王威

    2014-01-01

    Lu Zuofu implemented ethical management in Minsheng Corporation, took the realization of the overall modernization of China as the ethical objective of his company by making ethical decision for his company from the angle of serving the society and meanwhile by emphasizing the cultivation of the morality of his employees. Lu Zuofu, as the company manager, made himself an example and sticked to ethical leadship, which played a model role in the ethical selection of his employees. The ethical man-agement of Lu Zuofu made Minsheng Corporation have ethical advantage with unique characteristcs, which were further trans-formed into competitive advantage to forcefully ensure Minsheng Corporation to become the largest shipping group with Chinese private capital in modern China.%卢作孚在民生公司进行伦理管理,把帮助实现国家整体现代化作为公司的伦理目标,从服务社会的角度对公司进行伦理决策,同时重视员工的德性培育。卢作孚作为公司总经理以身垂范,坚持伦理领导,对员工的道德选择起到示范作用。卢作孚的伦理管理使民生公司形成独具特色的伦理优势,并进一步转化为竞争优势,有力地保证了公司发展成为近代中国最大的民族资本航运集团。

  11. DNA damage in blood lymphocytes in patients after {sup 177}Lu peptide receptor radionuclide therapy

    Energy Technology Data Exchange (ETDEWEB)

    Eberlein, Uta; Bluemel, Christina; Buck, Andreas Konrad; Werner, Rudolf Alexander; Lassmann, Michael [University of Wuerzburg, Department of Nuclear Medicine, Wuerzburg (Germany); Nowak, Carina; Scherthan, Harry [Bundeswehr Institute of Radiobiology affiliated to the University of Ulm, Munich (Germany)

    2015-10-15

    The aim of the study was to investigate DNA double strand break (DSB) formation and its correlation with the absorbed dose to the blood lymphocytes of patients undergoing their first peptide receptor radionuclide therapy (PRRT) with {sup 177}Lu-labelled DOTATATE/DOTATOC. The study group comprised 16 patients receiving their first PRRT. At least six peripheral blood samples were obtained before, and between 0.5 h and 48 h after radionuclide administration. From the time-activity curves of the blood and the whole body, residence times for blood self-irradiation and whole-body irradiation were determined. Peripheral blood lymphocytes were isolated, fixed with ethanol and subjected to immunofluorescence staining for colocalizing γ-H2AX/53BP1 DSB-marking foci. The average number of DSB foci per cell per patient sample was determined as a function of the absorbed dose to the blood and compared with an in vitro calibration curve established in our laboratory with {sup 131}I and {sup 177}Lu. The average number of radiation-induced foci (RIF) per cell increased over the first 5 h after radionuclide administration and decreased thereafter. A linear fit from 0 to 5 h as a function of the absorbed dose to the blood agreed with our in vitro calibration curve. At later time-points the number of RIF decreased, indicating progression of DNA repair. Measurements of RIF and the absorbed dose to the blood after systemic administration of {sup 177}Lu may be used to obtain data on the individual dose-response relationships in vivo. Individual patient data were characterized by a linear dose-dependent increase and an exponential decay function describing repair. (orig.)

  12. (90) Y/(177) Lu-labelled Cetuximab immunoconjugates: radiochemistry optimization to clinical dose formulation.

    Science.gov (United States)

    Chakravarty, Rubel; Chakraborty, Sudipta; Sarma, Haladhar Dev; Nair, K V Vimalnath; Rajeswari, Ardhi; Dash, Ashutosh

    2016-07-01

    Radiolabelled monoclonal antibodies (mAbs) are increasingly being utilized in cancer theranostics, which is a significant move toward tailored treatment for individual patients. Cetuximab is a recombinant, human-mouse chimeric IgG1 mAb that binds to the epidermal growth factor receptor with high affinity. We have optimized a protocol for formulation of clinically relevant doses (~2.22 GBq) of (90) Y-labelled Cetuximab and (177) Lu-labelled Cetuximab by conjugation of the mAb with a suitable bifunctional chelator, N-[(R)-2-amino-3-(paraisothiocyanato-phenyl)propyl]-trans-(S,S)-cyclohexane-1,2-diamine-N,N,N',N″,N″-pentaacetic acid (CHX-A″-DTPA). The radioimmunoconjugates demonstrated reasonably high specific activity (1.26 ± 0.27 GBq/mg for (90) Y-CHX-A″-DTPA-Cetuximab and 1.14 ± 0.15 GBq/mg for (177) Lu-CHX-A″-DTPA-Cetuximab), high radiochemical purity (>95%) and appreciable in vitro stability under physiological conditions. Preliminary biodistribution studies with both (90) Y-CHX-A″-DTPA-Cetuximab and (177) Lu-CHX-A″-DTPA-Cetuximab in Swiss mice bearing fibrosarcoma tumours demonstrated significant tumour uptake at 24-h post-injection (p.i.) (~16%ID/g) with good tumour-to-background contrast. The results of the biodistribution studies were further corroborated by ex vivo Cerenkov luminescence imaging after administration of (90) Y-CHX-A″-DTPA-Cetuximab in tumour-bearing mice. The tumour uptake at 24 h p.i. was significantly reduced with excess unlabelled Cetuximab, suggesting that the uptake was receptor mediated. The results of this study hold promise, and this strategy should be further explored for clinical translation.

  13. A study of response of a LuYAP:Ce array with innovative assembling for PET

    Energy Technology Data Exchange (ETDEWEB)

    Pani, Roberto [Department of Sciences and Medical and Surgical Biotechnology, Sapienza University of Rome, Rome (Italy); Cinti, Maria Nerina, E-mail: marianerina.cinti@uniroma1.it [Department of Molecular Medicine, Sapienza University of Rome, Rome (Italy); Scafè, Raffaele [Department of Molecular Medicine, Sapienza University of Rome, Rome (Italy); Bennati, Paolo [Department of Medical Engineering, Royal Institute of Technology (KTH), Stockholm (Sweden); Lo Meo, Sergio [ENEA, Ezio Clementel Research Center, Bologna (Italy); Preziosi, Enrico [Department of Molecular Medicine, Sapienza University of Rome, Rome (Italy); Morphofunctional Sciences – Biophysics, Doctorate School of Biology and Molecular Medicine – SAIMLAL Department, Sapienza University of Rome, Rome (Italy); Pellegrini, Rosanna [Department of Molecular Medicine, Sapienza University of Rome, Rome (Italy); De Vincentis, Giuseppe [Department of Radiological Sciences, Oncology and Anatomical Pathology, Sapienza University of Rome, Rome (Italy); Sacco, Donatella [INAIL, DIPIA, Monteporzio, Rome (Italy); Fabbri, Andrea [Department of Molecular Medicine, Sapienza University of Rome, Rome (Italy)

    2015-09-21

    We propose the characterization of a first array of 10×10 Lutetium Yttrium Orthoaluminate Perovskite (LuYAP:Ce) crystals, 2 mm×2 mm×10 mm pixel size, with an innovative assembling designed to enhance light output, uniformity and detection efficiency. The innovation consists of the use of 0.015 mm thick dielectric coating as inter-pixel light-insulators, manufactured by Crytur (Czech Republic) intended to improve crystal insulation and then light collection. Respect to the traditional treatment with 0.2 mm of white epoxy, a thinner pixel gap enhances packing fraction up to 98% with a consequent improvement of detection efficiency. Spectroscopic characterization of the array was performed by a Hamamatsu R6231 photomultiplier tube. A pixel-by-pixel scanning with a collimated {sup 99m}Tc radioisotope (140 keV photon energy) highlighted a deviation in pulse height close to 3.5% respect to the overall mean value. Meanwhile, in term of energy resolution a difference between the response of single pixel and the array of about 10% was measured. Results were also supported and validated by Monte Carlo simulations performed with GEANT4. Although the dielectric coating pixel insulator cannot overcome the inherent limitations of LuYAP crystal due to its self-absorption of light (still present), this study demonstrated that the new coating treatment allows better light collection (nearly close to the expected one) with in addition a very good uniformity between different pixels. These results confirm the high potentiality of this coating for any other crystal array suited for imaging application and new expectations for the use of LuYAP for PET systems.

  14. Cloverleaf domain patterns in multiferroic RMnO3 (R = Ho, Er, and Lu)

    Science.gov (United States)

    Horibe, Y.; Chae, S. C.; Lee, N.; Cheong, S.-W.

    2011-03-01

    Hexagonal RMn O3 (R=rare earths) exhibits a unique improper ferroelectricity induced by structural trimerization. Intriguing domain pattern associated with ferroelectricity and trimerization, so-called ``cloverleaf'' domain pattern, has been reported in YMn O3 In this talk, we will report the domain structures in a series of RMn O3 with different rare earth elements, obtained from the results of our transmission electron microscopy. Characteristic cloverleaf domain patterns are clearly observed in RMn O3 (R = Ho, Er, and Lu). The results imply that the cloverleaf domain pattern is a common domain feature in the hexagonal manganites.

  15. Observation of the $^1$S$_0$ to $^3$D$_1$ clock transition in $^{175}$Lu$^+$

    CERN Document Server

    Arnold, Kyle J; Roy, A; Paez, E; Wang, S; Barrett, M D

    2016-01-01

    We report the first laser spectroscopy of the $^1$S$_0$ to $^3$D$_1$ clock transition in $^{175}$Lu$^+$. Clock operation is demonstrated on three pairs of Zeeman transitions, one pair from each hyperfine manifold of the $^3$D$_1$ term. We measure the hyperfine intervals of the $^3$D$_1$ to 10 ppb uncertainty and infer the optical frequency averaged over the three hyperfine transitions to be 353.639 915 952 2 (6) THz. The lifetime of the $^3$D$_1$ state is inferred to be $174^{+23}_{-32}$ hours from the M1 coupling strength.

  16. Şerefeddin Sabuncuoğlu: Forgotten Vignette of 600 Years

    Directory of Open Access Journals (Sweden)

    Murat Dıramalı

    2014-05-01

    Full Text Available Şereffeddin Sabuncuoğlu (1385-1465 was a surgeon who lived in Amasya in Ottoman Era. He was a good calligrapher and illustrator also as we saw from his works he could speak Arabic, Persian and Greek. He wrote the first treatise with colored illustrations entitled “Cerrahiyet’ül-Haniyye” with his own drawings. Mistakenly considered to be a translation of al-Zahrawi’s book but a careful analysis shows that there are 137 different observations and suggestions. He made several contributions in proctology, cancer treatment and neurosurgery. This report aims to investigate his contributions anatomy.

  17. Coherent acoustic phonons in hexagonal manganite LuMnO3

    Science.gov (United States)

    Lim, D.; Averitt, R. D.; Demsar, J.; Taylor, A. J.; Hur, N.; Cheong, S. W.

    2003-12-01

    We have observed coherent acoustic phonons in the hexagonal manganite LuMnO3 using two-color femtosecond optical pump-probe spectroscopy. The dependence of the oscillatory component of the photoinduced reflectivity on the probe wavelength and incident angle is consistent with a propagating strain pulse. Moreover, the frequency, dephasing, and phase of the oscillation are found to be temperature dependent. In particular, a large phase shift occurs in the vicinity of the Néel temperature (TN), which we relate to the temperature-dependent on-site Mn d-d transition that is coupled to antiferromagnetic ordering, as recently observed in optical conductivity measurements.

  18. Magnetic domains in the ferromagnetic and ferroelectric mixture of (La, Lu, Sr)MnO3

    Science.gov (United States)

    de Lozanne, Alex; Hur, N.

    2005-03-01

    Single crystals of (La5/8Sr3/8MnO3)x(LuMnO3)1-x (LSMO)(LMO) synthesized by the floating-zone method were studied by Magnetic Force Microscopy (MFM). Samples were mechanically cut and polished with the surface normal to the growth direction. Polarized optical microscopy shows that LSMO and LMO are separated in a stripe-like pattern due to the chemical immiscibility.ootnotetextS. Park, et al., PRL 92, 167206 (2004) MFM images show magnetic domains (˜1μm) in the LSMO stripes and no magnetic signal in the LMO phase.

  19. Intertwining of Frustration with Magneto-Elastic Coupling in the Multiferroic LuMnO3

    Science.gov (United States)

    Yano, Shin-ichiro; Louca, Despina; Chi, Songxue; Matsuda, Masaaki; Qiu, Yiming; Copley, John R. D.; Cheong, Sang-Wook

    2014-02-01

    Residual magnetic frustration in the multiferroic LuMnO3 may be key towards understanding magneto-elastic coupling in hexagonal manganites. Critical magnetic scattering present well above the magnetic ordering temperature TN persists below, as observed by inelastic neutron scattering. The magnetic fluctuations are confined in two dimensions implied by the characteristic wavevector dependence of the magnetic structure factor that changes from symmetric to asymmetric across TN. The low dimensionality of the magnetic structure is also evident in the temperature dependence of the commensurate antiferromagnetic intensity which follows a mean field exponent of β ˜ 0.2.

  20. Multiferroic Properties of o-LuMnO3 Controlled by b-Axis Strain

    Science.gov (United States)

    Windsor, Y. W.; Huang, S. W.; Hu, Y.; Rettig, L.; Alberca, A.; Shimamoto, K.; Scagnoli, V.; Lippert, T.; Schneider, C. W.; Staub, U.

    2014-10-01

    Strain is a leading candidate for controlling magnetoelectric coupling in multiferroics. Here, we use x-ray diffraction to study the coupling between magnetic order and structural distortion in epitaxial films of the orthorhombic (o-) perovskite LuMnO3. An antiferromagnetic spin canting in the E-type magnetic structure is shown to be related to the ferroelectrically induced structural distortion and to a change in the magnetic propagation vector. By comparing films of different orientations and thicknesses, these quantities are found to be controlled by b-axis strain. It is shown that compressive strain destabilizes the commensurate E-type structure and reduces its accompanying ferroelectric distortion.

  1. Strain-Induced Ferromagnetism in Antiferromagnetic LuMnO3 Thin Films

    Science.gov (United States)

    White, J. S.; Bator, M.; Hu, Y.; Luetkens, H.; Stahn, J.; Capelli, S.; Das, S.; Döbeli, M.; Lippert, Th.; Malik, V. K.; Martynczuk, J.; Wokaun, A.; Kenzelmann, M.; Niedermayer, Ch.; Schneider, C. W.

    2013-07-01

    Single phase and strained LuMnO3 thin films are discovered to display coexisting ferromagnetic and antiferromagnetic orders. A large moment ferromagnetism (≈1μB), which is absent in bulk samples, is shown to display a magnetic moment distribution that is peaked at the highly strained substrate-film interface. We further show that the strain-induced ferromagnetism and the antiferromagnetic order are coupled via an exchange field, therefore demonstrating strained rare-earth manganite thin films as promising candidate systems for new multifunctional devices.

  2. Intertwining of Frustration with Magneto-Elastic Coupling in the Multiferroic LuMnO3

    Energy Technology Data Exchange (ETDEWEB)

    Yano, Shin-ichiro [University of Virginia; Louca, Despina [University of Virginia; Chi, Songxue [ORNL; Matsuda, Masaaki [ORNL; Copley, John R. D. [National Institute of Standards and Technology (NIST), Gaithersburg, MD; Cheong, Sang-Wook [Rutgers University

    2014-01-01

    Residual magnetic frustration in the multiferroic LuMnO3 may be key towards understanding magneto-elastic coupling in hexagonal manganites. Critical magnetic scattering present well above the magnetic ordering temperature TN persists below, as observed by inelastic neutron scattering. The magnetic fluctuations are confined in two dimensions implied by the characteristic wavevector dependence of the magnetic structure factor that changes from symmetric to asymmetric across TN. The low dimensionality of the magnetic structure is also evident in the temperature dependence of the commensurate antiferromagnetic intensity which follows a mean field exponent of 0.2.

  3. Inadequate prenatal care utilization and associated factors in São Luís, Brazil

    OpenAIRE

    Bernardes,Ariane Cristina Ferreira; da Silva, Raimundo Antonio; Coimbra,Liberata Campos; Alves, Maria Teresa Seabra Soares de Britto; Queiroz,Rejane Christine de Sousa; Batista,Rosângela Fernandes Lucena; Bettiol,Heloisa; Barbieri,Marco Antônio; da Silva, Antônio Augusto Moura

    2014-01-01

    Background Over the last decades there has been a reduction of social inequalities in Brazil, as well as a strong expansion of health services, including prenatal care. The objective of the present study was to estimate the rate of inadequate prenatal care utilization and its associated factors in São Luís, Brazil, in 2010 and to determine whether there was a reduction of inequity in prenatal care use by comparing the present data to those obtained from a previous cohort started in 1997/98. M...

  4. Balet v luči dijakov Konservatorija za glasbo in balet v Mariboru

    OpenAIRE

    Kmetec, Breda

    2016-01-01

    Diplomsko delo z naslovom Balet v luči dijakov Konservatorija za glasbo in balet v Mariboru smo v začetku predstavili s krajšim teoretičnim pregledom zgodovine plesa skozi obdobja. Več pozornosti smo v nadaljevanju namenili baletni umetnosti. Predstavili smo balet od izvora do 20. stoletja, oblačila v baletu, ki so se skozi obdobja spreminjala, baletni prostor, ki je ključnega pomena za učenje in poučevanje baleta. Nato smo teoretični del diplomskega dela smiselno povezali z empiričnim, zato ...

  5. High power, high repetition rate, few picosecond Nd:LuVO₄ oscillator with cavity dumping.

    Science.gov (United States)

    Gao, Peng; Guo, Jie; Li, Jinfeng; Lin, Hua; Yu, Haohai; Zhang, Huaijin; Liang, Xiaoyan

    2015-12-28

    We investigate the potential use of Nd:LuVO4 in high average power, high repetition rate ultrafast lasers. Maximum mode-locked average power of 28 W is obtained at the repetition rate of 58 MHz. The shortest pulse duration is achieved at 4 ps without dispersion compensation. With a cavity dumping technique, the pulse energy is scaling up to 40.7 μJ at 300 kHz and 14.3 μJ at 1.5 MHz.

  6. Measurement of the half-life of sup 1 sup 7 sup 6 Lu

    CERN Document Server

    Nir-El, Y

    1998-01-01

    The half-life of sup 1 sup 7 sup 6 Lu was determined by measuring the disintegration rate of a solution of lutetium oxide, using a calibrated HPGe detector, and found to be (3.69+-0.02)x10 sup 1 sup 0 y. It is recommended that the current adopted value be calculated from the grouping of three published values since 1983, including our value, the weighted mean of which is (3.73+-0.01)x10 sup 1 sup 0 y.

  7. Afterglow, low-temperature radioluminescence and thermoluminescence of Lu 2O 3:Eu ceramic scintillators

    Science.gov (United States)

    Kappers, L. A.; Bartram, R. H.; Hamilton, D. S.; Brecher, C.; Lempicki, A.

    2005-01-01

    Comparison of thermoluminescence (TL) and scintillation light outputs with continuous gamma-ray excitation reveals that the concentration of deep hole traps in ceramic Lu2O3:Eu, tentatively attributed to anion Frenkel defects, is enhanced by reversible radiation damage. Shallow electron and hole traps are tentatively attributed to surface states at grain boundaries. Electrons in shallow traps serve as non-radiative recombination centers. A model for anomalously persistent afterglow following pulsed X-ray excitation is based on a continuous distribution of hole traps inferred from TL following extended gamma-ray irradiation at -135 °C.

  8. Luminescence properties of Lu2O3: Tb film prepared by Pechini sol-gel method

    Science.gov (United States)

    Shen, Siqing; Wang, Jian; Xu, Zhibin; Xie, Jianjun; Shi, Ying

    2011-02-01

    Uniform and crack free Tb3+ doped lutetium oxide (Lu2O3:Tb) films were prepared by Pechini sol-gel method combined with the spin-coating technique. The influence of the different substrate (monocrystalline silicon (111) and silica glass) and atmosphere (N2 and Air) on the luminescence properties of films was investigated. According to the emission spectra, we found that the luminous intensity was higher on silica glass substrate. Moreover, it was found that the luminous intensity calcined in N2 was higher almost twice as that calcined in air.

  9. Structure refinement of Lu{sub 2}WO{sub 6} and luminescent properties of Eu{sup 3+}, Pr{sup 3+} doped Lu{sub 2}WO{sub 6}

    Energy Technology Data Exchange (ETDEWEB)

    Zhang Zhijun; Zhang Hui; Duan Chengjun; Yuan Junlin; Wang Xiaojun; Xiong Dingbang; Chen Haohong [State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050 (China); Graduate School of Chinese Academy of Science, Beijing (China); Zhao Jingtai [State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050 (China)], E-mail: jtzhao@mail.sic.ac.cn

    2008-10-20

    The crystal structure of Lu{sub 2}WO{sub 6} was determined from Rietveld refinement of X-ray powder diffraction data. It crystallizes in the monoclinic system belonging to space group P2/c (No.13) with lattice parameters: a = 7.5180(1) A, b = 5.2675(1) A, c = 11.2245(2) A, {beta} = 104.61(0){sup o}, V = 430.14(11) A{sup 3}, Z = 4. The conventional R indices obtained are R{sub p} = 0.090, R{sub wp} = 0.119 and R{sub B} = 0.075. The infinite chain comprised of Lu(2)O{sub 8} dodecahedra and Lu(3)O{sub 7} decahedra makes up the layer A, and the infinite straight chain is built of four-ring of polyhedra in which the WO{sub 6} and Lu(1)O{sub 8} groups alternate in layer B, finally, this structure is formed by stacking of these two layers with edge-shared. The X-ray and UV excited luminescence properties of Eu{sup 3+} and Pr{sup 3+} in Lu{sub 2}WO{sub 6} were investigated: Eu{sup 3+} shows high luminescent efficiency in emitting red light, and Pr{sup 3+} is less efficient in emitting orange light. The luminescent mechanism of Eu{sup 3+} and Pr{sup 3+} in the matrix of Lu{sub 2}WO{sub 6} is much different.

  10. Near-infrared to visible upconversion in Er3+ doped Cs3Lu2Cl9, Cs3Lu2Br9, and Cs3Y2I9 excited at 1.54 µm

    NARCIS (Netherlands)

    Lüthi, Stefan R.; Pollnau, Markus; Güdel, Hans U.; Hehlen, Markus P.

    1999-01-01

    A detailed study of upconversion processes in Cs3Er2X9 (X = Cl, Br, I) crystals and in the diluted systems Cs3Lu2Cl9:1% Er3+, Cs3Lu2Br9:1% Er3+, and Cs3Y2I9:1% Er3+ is presented. Efficient two-, three-, and four-step upconversion excitation along the sequence 4I15/2 4I13/2 4I9/2 4S3/2 2H9/2

  11. Smartphones and the plastic surgeon.

    Science.gov (United States)

    Al-Hadithy, Nada; Ghosh, Sudip

    2013-06-01

    Surgical trainees are facing limited training opportunities since the introduction of the European Working Time Directive. Smartphone sales are increasing and have usurped computer sales for the first time. In this context, smartphones are an important portable reference and educational tool, already in the possession of the majority of surgeons in training. Technology in the palm of our hands has led to a revolution of accessible information for the plastic surgery trainee and surgeon. This article reviews the uses of smartphones and applications for plastic surgeons in education, telemedicine and global health. A comprehensive guide to existing and upcoming learning materials and clinical tools for the plastic surgeon is included. E-books, podcasts, educational videos, guidelines, work-based assessment tools and online logbooks are presented. In the limited resource setting of modern clinical practice, savvy plastic surgeons can select technological tools to democratise access to education and best clinical care. Copyright © 2013 British Association of Plastic, Reconstructive and Aesthetic Surgeons. Published by Elsevier Ltd. All rights reserved.

  12. Mechanisms of GABAergic Homeostatic Plasticity

    Directory of Open Access Journals (Sweden)

    Peter Wenner

    2011-01-01

    Full Text Available Homeostatic plasticity ensures that appropriate levels of activity are maintained through compensatory adjustments in synaptic strength and cellular excitability. For instance, excitatory glutamatergic synapses are strengthened following activity blockade and weakened following increases in spiking activity. This form of plasticity has been described in a wide array of networks at several different stages of development, but most work and reviews have focussed on the excitatory inputs of excitatory neurons. Here we review homeostatic plasticity of GABAergic neurons and their synaptic connections. We propose a simplistic model for homeostatic plasticity of GABAergic components of the circuitry (GABAergic synapses onto excitatory neurons, excitatory connections onto GABAergic neurons, cellular excitability of GABAergic neurons: following chronic activity blockade there is a weakening of GABAergic inhibition, and following chronic increases in network activity there is a strengthening of GABAergic inhibition. Previous work on GABAergic homeostatic plasticity supports certain aspects of the model, but it is clear that the model cannot fully account for some results which do not appear to fit any simplistic rule. We consider potential reasons for these discrepancies.

  13. Mitochondria, synaptic plasticity, and schizophrenia.

    Science.gov (United States)

    Ben-Shachar, Dorit; Laifenfeld, Daphna

    2004-01-01

    The conceptualization of schizophrenia as a disorder of connectivity, i.e., of neuronal?synaptic plasticity, suggests abnormal synaptic modeling and neuronal signaling, possibly as a consequence of flawed interactions with the environment, as at least a secondary mechanism underlying the pathophysiology of this disorder. Indeed, deficits in episodic memory and malfunction of hippocampal circuitry, as well as anomalies of axonal sprouting and synapse formation, are all suggestive of diminished neuronal plasticity in schizophrenia. Evidence supports a dysfunction of mitochondria in schizophrenia, including mitochondrial hypoplasia, and a dysfunction of the oxidative phosphorylation system, as well as altered mitochondrial-related gene expression. Mitochondrial dysfunction leads to alterations in ATP production and cytoplasmatic calcium concentrations, as well as reactive oxygen species and nitric oxide production. All of the latter processes have been well established as leading to altered synaptic strength or plasticity. Moreover, mitochondria have been shown to play a role in plasticity of neuronal polarity, and studies in the visual cortex show an association between mitochondria and synaptogenesis. Finally, mitochondrial gene upregulation has been observed following synaptic and neuronal activity. This review proposes that mitochondrial dysfunction in schizophrenia could cause, or arise from, anomalies in processes of plasticity in this disorder.

  14. Investigation of magnetic structure evolution in the substitutional solid solution ScxLu(1-x)MnO3

    Science.gov (United States)

    Bieringer, M.; Greedan, J. E.; Wills, A. S.

    The hexagonal series AMnO3 (A = Lu, Sc) (space group: P63cm) is an excellent model system for the investigation of magnetic frustration as the magnetic sublattice is made up of edge sharing triangles with nearest neighbour antiferromagnetic exchange. At low temperatures the Mn3+ moments form a 120° long range ordered state. In LuMnO3 (TN=91 K) the magnetic moments are in the ab-plane and perpendicular to the hexagonal axis, whereas ScMnO3 (TN=130 K) undergoes an in-plane spin-reorientation transition below T=70 K. Powder neutron diffraction experiments for the substitutional solid solution ScxLu(1-x)MnO3 (0.0<=x<=1.0) show the evolution of the spin-reorientation as a function of x.

  15. Evaluation of (177)Lu-CHX-A''-DTPA-Bevacizumab as a radioimmunotherapy agent targeting VEGF expressing cancers.

    Science.gov (United States)

    Kameswaran, Mythili; Pandey, Usha; Gamre, Naresh; Vimalnath, K V; Sarma, Haladhar Dev; Dash, Ashutosh

    2016-08-01

    This study aimed at the preparation and evaluation of (177)Lu-CHX-A''-DTPA-Bevacizumab for targeting VEGF over-expressing cancers. Bevacizumab conjugated to p-NCS-Bn-CHX-A''-DTPA was radiolabeled with (177)Lu. The radioimmunoconjugate characterized by SE-HPLC exhibited radiochemical purity of 98.0±0.6%. In vitro stability was retained upto 4 days at 37°C. In vitro cell binding studies showed good uptake by VEGF expressing U937 tumor cells. Biodistribution studies in melanoma model showed significant uptake and retention of (177)Lu-CHX-A''-DTPA-Bevacizumab in tumor with reduction in uptake in presence of cold Bevacizumab confirming its specificity to VEGF. Copyright © 2016 Elsevier Ltd. All rights reserved.

  16. Synthesis, Tunable Multicolor Output, and High Pure Red Upconversion Emission of Lanthanide-Doped Lu2O3 Nanosheets

    Directory of Open Access Journals (Sweden)

    Lingzhen Yin

    2013-01-01

    Full Text Available Yb3+ and Ln3+ (Ln = Er, Ho codoped Lu2O3 square nanocubic sheets were successfully synthesized via a facile hydrothermal method followed by a subsequent dehydration process. The crystal phase, morphology, and composition of hydroxide precursors and target oxides were characterized by X-ray diffraction (XRD, field emission scanning electron microscope (FE-SEM, and energy-dispersive X-ray spectroscope (EDS. Results present the as-prepared Lu2O3 crystallized in cubic phase, and the monodispersed square nanosheets were maintained both in hydroxide and oxides. Moreover, under 980 nm laser diode (LD excitation, multicolor output from red to yellow was realized by codoped different lanthanide ions in Lu2O3. It is noteworthy that high pure strong red upconversion emission with red to green ratio of 443.3 of Er-containing nanocrystals was obtained, which is beneficial for in vivo optical bioimaging.

  17. Comparative Efficacy of 177Lu and 90Y for Anti-CD20 Pretargeted Radioimmunotherapy in Murine Lymphoma Xenograft Models

    Energy Technology Data Exchange (ETDEWEB)

    Frost, Sophia; Frayo, Shani; Miller, Brian W.; Orozco, Johnnie J.; Booth, Garrett C.; Hylarides, Mark; Lin, Yukang; Green, Damian J.; Gopal, Ajay K.; Pagel, John M.; Back, Tom; Fisher, Darrell R.; Press, Oliver W.

    2015-03-01

    Pretargeted radioimmunotherapy (PRIT) is a multi-step method of selectively delivering high doses of radiotherapy to tumor cells while minimizing exposure to surrounding tissues. Yttrium-90 (90Y) and lutetium-177 (177Lu) are two of the most promising beta-particle emitting radionuclides used for radioimmunotherapy, which despite having similar chemistries differ distinctly in terms of radiophysical features. These differences may have important consequences for the absorbed dose to tumors and normal organs. Whereas 90Y has been successfully applied in a number of preclinical and clinical radioimmunotherapy settings, there have been few published pretargeting studies with 177Lu. We therefore compared the therapeutic potential of targeting either 90Y or 177Lu to human B-cell lymphoma xenografts in mice.

  18. Linear analysis on the stability of lanthanide vapor complexes LnAl3Cli2(Ln = La to Lu)

    Institute of Scientific and Technical Information of China (English)

    2003-01-01

    The reactions LnCl3 (s) + (3/2)Al2Cl6 (g) = LnAl3Cl12 (g) for Ln = La to Lu were studied by quenching experi-ments in roughly the same temperature and pressure ranges (588-851 K and 0.01-0.22 MPa). Stability constants Kθ oflanthanide complexes LnAl3Cl12 were calculated from the measurements. The values of lg Kθ change linearly with theionpotential (Z+/r) of lanthanide(Ⅲ) from La to Gd and from Tb to Lu, respectively, indicating the Gd break. There exist in-clined W effect between lg Kθ and the total angular momentum L of lanthanide(Ⅲ). And hereby lanthanide elements aredivided into four segments, La-Nd, Pm-Gd, Tb-Ho, and Er-Lu. In each segment, the linearity is maintained.

  19. Lu1-xI3:Cex--A Scintillator for gamma ray spectroscopy and time-of-flight PET

    Science.gov (United States)

    Shah, Kanai S.

    2009-03-17

    The present invention concerns very fast scintillator materials comprising lutetium iodide doped with Cerium Lu.sub.1-xI.sub.3:Ce.sub.x; LuI.sub.3:Ce). The LuI.sub.3 scintillator material has surprisingly good characteristics including high light output, high gamma ray stopping efficiency, fast response, low cost, good proportionality, and minimal afterglow that the material is useful for gamma ray spectroscopy, medical imaging, nuclear and high energy physics research, diffraction, non-destructive testing, nuclear treaty verification and safeguards, and geological exploration. The timing resolution of the scintillators of the present invention provide compositions capable of resolving the position of an annihilation event within a portion of a human body cross-section.

  20. 177 Lu-Dota-octreotate radionuclide therapy of advanced gastrointestinal neuroendocrine tumors: results from a phase II study

    Energy Technology Data Exchange (ETDEWEB)

    Paganelli, Giovanni; Sansovini, Maddalena; Ambrosetti, Alice; Severi, Stefano; Ianniello, Annarita; Matteucci, Federica [Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Nuclear Medicine and Radiometabolic Units, Meldola, FC (Italy); Monti, Manuela; Scarpi, Emanuela [IRST IRCCS, Unit of Biostatistics and Clinical Trials, Meldola (Italy); Donati, Caterina [IRST IRCCS, Oncology Pharmacy Laboratory, Meldola (Italy); Amadori, Dino [IRST IRCCS, Department of Medical Oncology, Meldola (Italy)

    2014-10-15

    We evaluated the activity and safety profile of {sup 177}Lu-Dotatate peptide receptor radionuclide therapy (Lu-PRRT) in patients with advanced, well-differentiated (G1-G2) gastrointestinal neuroendocrine tumors (GI-NETs). Forty-three patients with radiological tumor progression at baseline and a positive Octreoscan registered completed the treatment with Lu-PRRT, resulting in the cumulative activity of 18.5 or 27.8 GBq in five cycles. Total activity was scheduled on the basis of kidney function or bone marrow reserve. Twenty-five (58 %) patients were treated with a ''standard'' Lu-PRRT full dosage (FD) of 25.7 GBq (range 22.2-27.8), while the remaining 18 patients (42 %) who, at enrolment, showed a higher probability of developing kidney or bone marrow toxicity received a reduced dosage (RD) of 18.4 GBq (range 14.4-20.4). According to SWOG criteria, the overall response was complete response (CR) in (7 %) cases and stable disease (SD) in 33 (77 %), with a disease control rate (DCR) of 84 %. Median response duration was 25 months (range 7-50). Median progression-free survival (PFS) was 36 months (95 % CI 24-nr), and median overall survival (OS) has not yet been reached. Remarkably, none of the patients, including those at a higher risk of toxicity, showed side-effects after either dosage of Lu-PRRT. Lu-PRRT was shown to be an effective therapeutic option in our patients with advanced progressive GI-NETs, showing an 84 % DCR (95 % CI 73-95) that lasted for 25 months and a PFS of 36 months. Both activities of 27.8 GBq and 18.5 GBq proved safe and effective in all patients, including those with a higher probability of developing kidney or bone marrow toxicity. (orig.)

  1. Lu Xun and Anti-Christian Movement%鲁迅与非基督教运动

    Institute of Scientific and Technical Information of China (English)

    杨世海

    2013-01-01

    The Anti-Christian movement in 192−1927 was an important social and political movement after the May Fourth Movement. Most of the cultural elite involved in the movement, but Lu Xun did not directly participate in it, and the reason is worth exploring. Lu Xun did not intervene in the movement, but the movement was still affected Lu Xun’s attitude towards Christianity, which not only let Lu Xun changed his mind to Christianity, but also cut off the possibility that Lu Xun might realize the Christian holy transcendent value, which, in turn, might directly affect the depth and direction of Lu Xun's ideas and literary creation.%  1922−1927年的非基督教运动是继五四运动后又一次规模巨大的社会政治运动,当时大多数文化精英都介入了这一运动,但鲁迅并未直接参与,其中缘由值得探讨。鲁迅虽未介入这一运动,但仍然受到影响,他对基督教的态度由此发生变化,鲁迅走向基督教神圣超越价值的可能断绝,也就直接影响到鲁迅思想和文学创作的深度和方向。

  2. An Improved LU-SGS Implicit Scheme for High Reynolds Number Flow Computations on Hybrid Unstructured Mesh

    Institute of Scientific and Technical Information of China (English)

    WANG Gang; JIANG Yuewen; YE Zhengyin

    2012-01-01

    The lower-upper symmetric Gauss-Seidel (LU-SGS) implicit relaxation has been widely used because it has the merits of less dependency on grid topology,low numerical complexity and modest memory requirements.In original LU-SGS scheme,the implicit system matrix is construeted based on the splitting of convective flux Jacobian according to its spectral radius.Although this treatment has the merit of reducing computational complexity and helps to ensure the diagonally dominant property of the implicit system marx,it can also cause serious distortions on the implicit system matrix because too many approximations are introduced by this splitting method if the contravariant velocity is small or close to sonic speed.To overcome this shortcoming,an improved LU-SGS scheme with a hybrid construction method for the implicit system matrix is developed in this paper.The hybrid way is that:on the cell faces having small contravariant velocity or transonic contravariant velocity,the accurate derivative of the convective flux term is used to construct more accurate implicit system matrix,while the original Jacobian splitting method is adopted on the other cell faces to reduce computational complexity and ensure the diagonally dominant property of the implicit system matrix.To investigate the convergence performance of the improved LU-SGS scheme,2D and 3D turbulent flows around the NACA0012 airfoil,RAE2822 airfoil and LANN wing are simulated on hybrid unstructured meshes.The numerical results show that the improved LU-SGS scheme is significantly more efficient than the original LU-SGS scheme.

  3. China Plastics Industry (2011) China Plastics Processing Industry Association

    Institute of Scientific and Technical Information of China (English)

    Li Ying

    2012-01-01

    General situation of China plastics industry in 2011 was reviewed, including the output and export/import of plastics products, synthetic resins,and plastics processing machinery, as well as major economic data, such as the total industrial values, sales and profits of plastics products, etc. Analysis of the market of plastics products in 2011 was made, and the developing trend of China plastics industry in 2012 was proposed.

  4. A systematic study on the utility of CHX-A''-DTPA-NCS and NOTA-NCS as bifunctional chelators for (177)Lu radiopharmaceuticals.

    Science.gov (United States)

    Pandey, Usha; Gamre, Naresh; Lohar, Sharad Pandurang; Dash, Ashutosh

    2017-09-01

    This paper describes the evaluation of [(R)-2-Amino-3-(4-isothiocyanatophenyl)propyl]-trans-(S,S)-cyclohexane-1,2-diamine-pentaacetic acid (CHX-A''-DTPA-NCS) and 2-S-(4-isothiocyanatobenzyl)-1,4,7-triazacyclononane-1,4,7-triacetic acid (NOTA-NCS) as bifunctional chelators for (177)Lu. While (177)Lu-CHX-A''-DTPA-NCS could be obtained in high yields at equimolar ratios of lutetium to CHX-A''-DTPA-NCS, >95% yield of (177)Lu-NOTA-NCS could be achieved at 1:2M ratio of lutetium to NOTA-NCS. Trace metals reduced the yields of (177)Lu-NOTA-NCS significantly as compared to (177)Lu-CHX-A''-DTPA-NCS. In vitro stability of (177)Lu-CHX-A''-DTPA-NCS was also superior to (177)Lu-NOTA-NCS. It could be concluded from this study that among the two chelators evaluated, CHX-A''-DTPA-NCS is more appropriate for preparation of (177)Lu radiopharmaceuticals. Copyright © 2017 Elsevier Ltd. All rights reserved.

  5. The Prism Plastic Calorimeter (PPC)

    CERN Multimedia

    2002-01-01

    This proposal supports two goals: \\\\ \\\\ First goal:~~Demonstrate that current, widely used plastic technologies allow to design Prism Plastic Calorimeter~(PPC) towers with a new ``liquid crystal'' type plastic called Vectra. It will be shown that this technique meets the requirements for a LHC calorimeter with warm liquids: safety, hermeticity, hadronic compensation, resolution and time response. \\\\ \\\\ Second goal:~~Describe how one can design a warm liquid calorimeter integrated into a LHC detector and to list the advantages of the PPC: low price, minimum of mechanical structures, minimum of dead space, easiness of mechanical assembly, accessibility to the electronics, possibility to recirculate the liquid. The absorber and the electronic being outside of the liquid and easily accessible, one has maximum flexibility to define them. \\\\ \\\\ The R&D program, we define here aims at showing the feasibility of these new ideas by building nine towers of twenty gaps and exposing them to electron and hadron beams.

  6. Plasticity in glutamatergic NTS neurotransmission.

    Science.gov (United States)

    Kline, David D

    2008-12-10

    Changes in the physiological state of an animal or human can result in alterations in the cardiovascular and respiratory system in order to maintain homeostasis. Accordingly, the cardiovascular and respiratory systems are not static but readily adapt under a variety of circumstances. The same can be said for the brainstem circuits that control these systems. The nucleus tractus solitarius (NTS) is the central integration site of baroreceptor and chemoreceptor sensory afferent fibers. This central nucleus, and in particular the synapse between the sensory afferent and second-order NTS cell, possesses a remarkable degree of plasticity in response to a variety of stimuli, both acute and chronic. This brief review is intended to describe the plasticity observed in the NTS as well as the locus and mechanisms as they are currently understood. The functional consequence of NTS plasticity is also discussed.

  7. The pseudogap and anisotropic thermal expansion in RMn(4)Al(8) (R = La,Y,Lu and Sc).

    Science.gov (United States)

    Muro, Y; Nakamura, H; Kohara, T

    2006-04-26

    The temperature dependence of the magnetic susceptibility shows a broad maximum at ∼550 and 630 K for LuMn(4)Al(8) and ScMn(4)Al(8), respectively, which can be interpreted as due to the presence of a pseudogap in the effective bands as in LaMn(4)Al(8) and YMn(4)Al(8). The anisotropic thermal expansion observed for RMn(4)Al(8) (R = La, Y, Lu and Sc) and the sensitive volume dependence of the gap width throughout the RMn(4)Al(8) system suggest dominant magnetic coupling in Mn spin chains along the c axis.

  8. Risk factors for preterm births in São Luís, Maranhão, Brazil

    OpenAIRE

    Aragão Vânia Maria de Farias; Silva Antônio Augusto Moura da; Aragão Lívia Farias de; Barbieri Marco Antônio; Bettiol Heloísa; Coimbra Liberata Campos; Ribeiro Valdinar Sousa

    2004-01-01

    Preterm birth continues to be one of the main causes of neonatal morbidity and mortality. The objective of the present study was to identify risk factors for preterm birth in São Luís, Maranhão, Brazil. The sample consisted of hospital births at 10 public and private hospitals from March 1, 1997 to February 28, 1998. A total of 2,443 live births were randomly selected, excluding multiple deliveries and stillbirths. Preterm birth rate in São Luís was 12.7%. Risk factors for preterm delivery we...

  9. Multispecies animal investigation on biodistribution, pharmacokinetics and toxicity of {sup 177}Lu-EDTMP, a potential bone pain palliation agent

    Energy Technology Data Exchange (ETDEWEB)

    Mathe, Domokos [Department of Applied Radioisotopes and Animal Experimentation, National ' Frederic Joliot-Curie' Institute of Radiobiology and Radiohygiene, H-1221 Budapest (Hungary)], E-mail: mdomokos@hp.osski.hu; Balogh, Lajos; Polyak, Andras; Kiraly, Reka [Department of Applied Radioisotopes and Animal Experimentation, National ' Frederic Joliot-Curie' Institute of Radiobiology and Radiohygiene, H-1221 Budapest (Hungary); Marian, Terez [Institute of Nuclear Medicine, Debrecen University, Debrecen (Hungary); Pawlak, Dariusz [Institute of Atomic Energy, Radioisotope Centre POLATOM, Swierk-Otwock (Poland); Zaknun, John J.; Pillai, Maroor R.A. [International Atomic Energy Agency (IAEA), Vienna (Austria); Janoki, Gyozo A. [Department of Applied Radioisotopes and Animal Experimentation, National ' Frederic Joliot-Curie' Institute of Radiobiology and Radiohygiene, H-1221 Budapest (Hungary)

    2010-02-15

    Introduction: Radionuclide therapy (RNT) is an effective method for bone pain palliation in patients suffering from bone metastasis. Due to the long half-life, easy production and relatively low {beta}- energy, {sup 177}Lu [T{sub 1/2}=6.73 days, E{sub {beta}}{sub max}=497 keV, E{sub {gamma}}=113 keV (6.4%), 208 keV (11%)]-based radiopharmaceuticals offer logistical advantage for wider use. This paper reports the results of a multispecies biodistribution and toxicity studies of {sup 177}Lu-EDTMP to collect preclinical data for starting human clinical trials. Methods: {sup 177}Lu-EDTMP with radiochemical purity greater than 99% was formulated by using a lyophilized kit of EDTMP (35 mg of EDTMP, 5.72 g of CaO and 14.1 mg of NaOH). Biodistribution studies were conducted in mice and rabbits. Small animal imaging was performed using NanoSPECT/CT (Mediso, Ltd., Hungary) and digital autoradiography. Gamma camera imaging was done in rabbits and dogs. Four levels of activity (9.25 through 37 MBq/kg body weight) of {sup 177}Lu-EDTMP were injected in four groups of three dogs each to study the toxicological effects. Results: {sup 177}Lu-EDTMP accumulated almost exclusively in the skeletal system (peak ca. 41% of the injected activity in bone with terminal elimination half-life of 2130 and 1870 h in mice and rabbits, respectively) with a peak uptake during 1-3 h. Excretion of the radiopharmaceutical was through the urinary system. Imaging studies showed that all species (mouse, rat, rabbit and dog) take up the compound in regions of remodeling bone, while kidney retention is not visible after 1 day postinjection (pi). In dogs, the highest applied activity (37 MBq/kg body weight) led to a moderate decrease in platelet concentration (mean, 160 g/L) at 1 week pi with no toxicity. Conclusion: The protracted effective half-life of {sup 177}Lu-EDTMP in bone supports that modifying the EDTMP molecule by introducing {sup 177}Lu does not alter its biological behaviour as a specific bone

  10. The Studies on Diurnal Butterflies (Lepidoptera: Rhopalocera in Canakkale Onsekiz Mart University Terzioğlu Campus

    Directory of Open Access Journals (Sweden)

    D. Zobar

    2008-09-01

    Full Text Available The purpose of the study is to determine lepidopteran species on Terzioğlu Campus during March 2005–April 2007. We surveyed Rhopalocera butterflies in Çanakkale Onsekiz Mart University, Terzioğlu Campus, in Çanakkale, Turkey. In this study, total of 44 species belonging to to Papilionidae (4, Nymphalidae (23, Pieridae (8, Lycaenidae (4 and Hesperiidae (5, were identified. The most abundant species throughout the campus are Pieris brassicae, P. rapae, P. napi, Colias crocea, Iphiclides podalirius, and Melanargia larissa.

  11. A new edge-preserving algorithm based on the CIE- Lu'v' color space for color contrast enhancement

    OpenAIRE

    ZOLFAGHARI, Mohammad; Yazdi, Mehran

    2014-01-01

    Image segmentation and edge detection are the most important presteps in machine vision, and their successfulness can affect the success of the next steps. In this paper, the performance of the Trahanias edge detector in different color spaces, such as RGB, YCbCr, HSI, and CIE Lu'v', is compared in order to find the best color space for image segmentation and edge detection. We then offer an efficient edge-preserving algorithm for color contrast enhancement in the CIE Lu'...

  12. First principle study of AlX (X=3d, 4d, 5d elements and Lu) dimer.

    Science.gov (United States)

    Ouyang, Yifang; Wang, Jianchuan; Hou, Yuhua; Zhong, Xiaping; Du, Yong; Feng, Yuanping

    2008-02-21

    The ground state equilibrium bond length, harmonic vibrational frequency, and dissociation energy of AlX (X=3d,4d,5d elements and Lu) dimers are investigated by density functional method B3LYP. The present results are in good agreement with the available experimental and other theoretical values except the dissociation energy of AlCr. The present calculations show that the late transition metal can combine strongly with aluminum compared with the former transition metal. The present calculation also indicates that it is more reasonable to replace La with Lu in the Periodic Table and that the bonding strengths of zinc, cadmium, and mercury with aluminum are very weak.

  13. Polishing compound for plastic surfaces

    Science.gov (United States)

    Stowell, Michael S.

    1995-01-01

    A polishing compound for plastic surfaces. The compound contains by weight approximately 4 to 17 parts at least one petroleum distillate lubricant, 1 to 6 parts mineral spirits, 2.5 to 15 parts abrasive particles, and 2.5 to 10 parts water. The abrasive is tripoli or a similar material that contains fine particles silica. Preferably, most of the abrasive particles are less than approximately 10 microns, more preferably less than approximately 5 microns in size. The compound is used on PLEXIGLAS.TM., LEXAN.TM., LUCITE.TM., polyvinyl chloride (PVC) and similar plastic materials whenever a smooth, clear polished surface is desired.

  14. Polishing compound for plastic surfaces

    Energy Technology Data Exchange (ETDEWEB)

    Stowell, M.S.

    1993-01-01

    A polishing compound for plastic surfaces is disclosed. The compound contains by weight approximately 4 to 17 parts at least one petroleum distillate lubricant, 1 to 6 parts mineral spirits, 2.5 to 15 parts abrasive particles, and 2.5 to 10 parts water. The abrasive is tripoli or a similar material that contains colloidal silica. Preferably, most of the abrasive particles are less than approximately 10 microns, more preferably less than approximately 5 microns in size. The compound is used on PLEXIGLAS{sup TM}, LEXAN{sup TM}, LUCITE{sup TM}, polyvinyl chloride (PVC) and similar plastic materials whenever a smooth, clear polished surface is desired.

  15. Temperature dependent PAC studies with the rare earth '$^{172}$Lu' in ZnO

    CERN Document Server

    Nédélec, R

    2006-01-01

    Wide band-gap semiconductors have become an important base material for applications in optoelectronics and in high power, high temperature electronics. After doping with various rare earths, electroluminescence throughout the whole visible spectrum has been observed. We have studied the implantation behaviour of the rare earth Lu in ZnO. Our samples were implanted at the ISOLDE facility at CERN. In order to recover the sustained implantation damage the samples were treated in a rapid thermal annealing furnace. In a first attempt to measure the temperature dependence of the electric field gradient at the site of 172Lu/172Yb in ZnO a large jump in the quadrupole interaction frequency was observed between measurements at room temperature and 200 °C. Above 200 °C the frequency only changed very little. In order to understand this unusual behaviour we prepared another sample and studied the temperature range between room temperature and 200 °C in more detail. The results obtained previously could be confirmed....

  16. Characterization of 176Lu background in LSO-based PET scanners

    Science.gov (United States)

    Conti, Maurizio; Eriksson, Lars; Rothfuss, Harold; Sjoeholm, Therese; Townsend, David; Rosenqvist, Göran; Carlier, Thomas

    2017-05-01

    LSO and LYSO are today the most common scintillators used in positron emission tomography. Lutetium contains traces of 176Lu, a radioactive isotope that decays β - with a cascade of γ photons in coincidence. Therefore, Lutetium-based scintillators are characterized by a small natural radiation background. In this paper, we investigate and characterize the 176Lu radiation background via experiments performed on LSO-based PET scanners. LSO background was measured at different energy windows and different time coincidence windows, and by using shields to alter the original spectrum. The effect of radiation background in particularly count-starved applications, such as 90Y imaging, is analysed and discussed. Depending on the size of the PET scanner, between 500 and 1000 total random counts per second and between 3 and 5 total true coincidences per second were measured in standard coincidence mode. The LSO background counts in a Siemens mCT in the standard PET energy and time windows are in general negligible in terms of trues, and are comparable to that measured in a BGO scanner of similar size.

  17. Electric Field Effect on the Magnetic Order in Multiferroic LuMnO3

    Science.gov (United States)

    Duan, Chunruo; Yang, Junjie; Harriger, Leland; Louca, Despina

    LuMnO3 belongs to the family of hexagonal multiferroics in which ferroelectric and magnetic orders coexist and compete. The Mn3+ ions reside on a triangular lattice that is geometrically frustrated but undergoes a Neel transition at TN ~90 K. Neutron experiments under electric field were carried out on a single crystal of LuMnO3 at SPINS to investigate the coupling of the electric field to the magnetic order. The elastic and inelastic scattering around the commensurate (101) magnetic peak and the Mn trimerization induced (100) peak with and without electric field were investigated. When applying an E-field of 13.3 kV/cm along the (001) direction on an unpoled sample, an increase in (101) peak as well as a shift of the inelastic excitation near (100) to higher ΔE have been observed. Once the sample is polarized, these effects exist without the field. On the other hand, an E-field along (110) direction shows almost no effect. The spin arrangement of the magnetic order is within the ab-plane, thus the Dzyaloshinskii-Moriya interaction explains why a polarization perpendicular to the magnetic moment gives a larger effect. The implication will be discussed.

  18. Magnon breakdown in a two dimensional triangular Heisenberg antiferromagnet LuMnO3

    Science.gov (United States)

    Oh, Joosung; Le, Manh-Duc; Jeong, Jaehong; Park, Je-Geun; Lee, Jung-Hyun; Song, Wan-Young; Perring, T. G.; Woo, Hyungje; Buyers, W. J. L.; Cheong, S.-W.

    2014-03-01

    Magnons, the quasi-particles of long range ordered magnetic systems, have long been viewed as long lived excitations with spectra that are well described by linear spin wave theory (LSWT). Recent theoretical works, though, suggest that the magnon spectrum of 2D triangular Heisenberg antiferromagnet (THA) is highly renormalized downward with a roton-like minimum at the M point. This, as well as the decay of single magnons into two magnon states, was interpreted as the effects of a cubic interaction between magnons arising from the noncollinear spin structure LuMnO3 is a good 2D THA candidate to test this prediction since it has a noncollinear 120° spin structure with S =2. We have conducted inelastic neutron scattering experiments using a LuMnO3 single crystal. Much of the observed spectrum is well described by LSWT, but, a closer inspection of the M point show deviations: a minimum at the lowest energy mode, a flat dispersion at upper modes and line width broadening at the top of the dispersion due to magnon decay. These features agree qualitatively with the theoretical predictions, revealing the importance of the cubic interaction between magnons in 2D THA

  19. Antiferromagnetic Resonance in Multiferroic YMnO3 and LuMnO3

    Science.gov (United States)

    Zvyagin, Sergei

    2009-03-01

    Multiferroic rare-earth manganites have attracted much attention because of the coexistence of ferroelectric and magnetic orders. Combining conventional far-infrared Fourier-transform and THz-range free electron laser electron spin resonance (ESR) spectroscopy techniques, magnetic excitations in hexagonal multiferroic YMnO3 and LuMnO3 in the antiferromagnetically (AFM) ordered phase have been studied. The gap in the excitation spectrum (˜42 and ˜48 cm-1 for YMnO3 and LuMnO3, respectively) was observed directly. Similar slope of the frequency-field dependences of AFM resonance modes, ˜ 0.5 cm-1/T, was revealed for both compounds. A fine structure of AFM resonance absorption has been revealed by means of high-resolution ESR techniques, which can be explained taking into account a finite interaction between the neighboring Mn^3+ layers. The work was done in collaboration with M. Ozerov, D. Kamensky, E. Cizm'ar, J. Wosnitza, A.K. Kolezhuk, D. Smirnov, H.D. Zhou, and C.R. Wiebe.

  20. Origin of room-temperature multiferroism in hexagonal LuFeO3

    Science.gov (United States)

    Wu, Xifan; Wang, Hongwei; Solovyev, Igor; Shen, Jian; Wang, Wenbin; Wang, Xiao; Cheng, Xuemei; He, Lixin; Xu, Xiaoshan

    2014-03-01

    Combined theoretical and experimental studies are carried out, focusing on the exchange interactions and their couplings with the structural instabilities in hexagonal LuFeO3 (hLFO). We apply an extended Kugel-Khomskii model based on maximally localized Wannier functions generated from band structure calculations. The model clearly shows that the single occupied dz2 orbital in hLFO greatly increases the exchange coupling compared to that of hexagonal LuMnO3 in which dz2 is empty. The interlayer exchange interaction is the key to the spin reorientation (SR) and weak ferromagnetic moment observed below 130K. Our calculations show that SR is strongly coupled to the K1 phonon mode and only weakly dependent on K3 and Γ2- phonons. It indicates that the atomic displacements along positive direction of K1 mode is responsible for the spin reorientation. This scenario is confirmed by our X-ray diffraction and X-ray absorption experiments. In the end, we propose that TSR can be adjusted to be room temperature by structural competition between K1 and Γ2- modes in hLFO or by interface engineering.

  1. Femtosecond laser excitation of coherent optical phonons in ferroelectric LuMnO3

    Science.gov (United States)

    Lou, Shi-Tao; Zimmermann, Frank M.; Bartynski, Robert A.; Hur, Namjung; Cheong, Sang-Wook

    2009-06-01

    We have used femtosecond pump-probe spectroscopy to excite and probe coherent optical phonon vibrations in single crystals of hexagonal ferroelectric LuMnO3 . An optical phonon mode of A1 symmetry was coherently excited with 25 fs pump-laser pulses (λ≈800nm) . The phonon mode, involving Lu ion motion along the c axis, was identified as the soft mode driving the ferroelectric transition. The excitation mechanism was determined to be purely displacive in nature due to resonant excitation of a narrow intra-atomic dxy,x2-y2→d3z2-r2 transition in Mn. The lifetime of the Mndxy,x2-y2→d3z2-r2 excitation was measured to be 0.8 ps. A remarkable reversal of the sign of the oscillation amplitude ( π phase shift) of the reflectivity curve was observed upon comparing longitudinal-optical (LO) with transverse-optical (TO) mode geometries. The phase reversal is attributed to the macroscopic electric depolarization field accompanying infrared-active longitudinal phonon modes but absent in TO modes. In addition to the direct effect of the ion motion on the optical properties, which is the same in LO and TO modes, the longitudinal depolarization field of the LO mode gives rise to an additional modulation of the refractive index via the linear electro-optic effect which dominates the optical response.

  2. Preparation and biological evaluation of {sup 177}Lu conjugated PR81 for radioimmunotherapy of breast cancer

    Energy Technology Data Exchange (ETDEWEB)

    Salouti, Mojtaba, E-mail: saloutim@yahoo.com [Department of Biology, Faculty of Sciences, Zanjan Branch, Islamic Azad University, Zanjan 45156-58145 (Iran, Islamic Republic of); Babaei, Mohammad Hossein [Nuclear Biomolecule Laboratory, Radioisotope Department, Nuclear Science and Technology Research Institute, Tehran 14144-1339 (Iran, Islamic Republic of); Rajabi, Hossein [Department of Medical Physics, Faculty of Medical Sciences, Tarbiat Modares University, Tehran 14115-111 (Iran, Islamic Republic of); Rasaee, Mohammad javad [Department of Medical Biotechnology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran 14115-111 (Iran, Islamic Republic of)

    2011-08-15

    Aim: PR81 is a monoclonal antibody that binds with high affinity to MUC1 antigen that is over expressed in 80% of breast cancers. In this study, we developed a method for indirect labeling of PR81 with lutetium-177 and performed all preclinical qualifications in production of a biologic agent for radioimmunotherapy of breast cancer. Materials and Methods: The radiochemical purity and in vitro stability of {sup 177}Lu labeled PR81 was determined by instant thin layer chromatography. The immunoreactivity and cell toxicity of the complex were tested on MCF7 cell line. The biodistribution and scintigraphy studies were performed in BALB/c mice with breast tumor. Results: The radiochemical purity was 91.2{+-}3.8% after 2 h. The in vitro stabilities in phosphate buffer and human blood serum were 83.1{+-}3.4% and 76.2{+-}3.6% at 96 h, respectively. The immunoreactivity of the complex was 83.4{+-}2.4%. The cell toxicity study showed that the complex inhibited 85.2{+-}3.4% growth of MCF7 cells at a concentration of 2500 ng/ml after 96 h. The biodistribution and scintigraphy studies showed the accumulation of the complex at the site of tumors with high sensitivity and specificity. Conclusion: The results showed that one may consider {sup 177}Lu-DOTA-PR81 as a potential radiopharmaceutical for therapy of human breast cancer, which needs further investigations.

  3. Advancing Control for Shield Tunneling Machine by Backstepping Design with LuGre Friction Model

    Directory of Open Access Journals (Sweden)

    Haibo Xie

    2014-01-01

    Full Text Available Shield tunneling machine is widely applied for underground tunnel construction. The shield machine is a complex machine with large momentum and ultralow advancing speed. The working condition underground is rather complicated and unpredictable, and brings big trouble in controlling the advancing speed. This paper focused on the advancing motion control on desired tunnel axis. A three-state dynamic model was established with considering unknown front face earth pressure force and unknown friction force. LuGre friction model was introduced to describe the friction force. Backstepping design was then proposed to make tracking error converge to zero. To have a comparison study, controller without LuGre model was designed. Tracking simulations of speed regulations and simulations when front face earth pressure changed were carried out to show the transient performances of the proposed controller. The results indicated that the controller had good tracking performance even under changing geological conditions. Experiments of speed regulations were carried out to have validations of the controllers.

  4. Realistic multi-cellular dosimetry for (177)Lu-labelled antibodies: model and application.

    Science.gov (United States)

    Marcatili, S; Pichard, A; Courteau, A; Ladjohounlou, R; Navarro-Teulon, I; Repetto-Llamazares, A; Heyerdahl, H; Dahle, J; Pouget, J P; Bardiès, M

    2016-10-07

    Current preclinical dosimetric models often fail to take account of the complex nature of absorbed dose distribution typical of in vitro clonogenic experiments in targeted radionuclide therapy. For this reason, clonogenic survival is often expressed as a function of added activity rather than the absorbed dose delivered to cells/cell nuclei. We designed a multi-cellular dosimetry model that takes into account the realistic distributions of cells in the Petri dish, for the establishment of survival curves as a function of the absorbed dose. General-purpose software tools were used for the generation of realistic, randomised 3D cell culture geometries based on experimentally determined parameters (cell size, cell density, cluster density, average cluster size, cell cumulated activity). A mixture of Monte Carlo and analytical approaches was implemented in order to achieve as accurate as possible results while reducing calculation time. The model was here applied to clonogenic survival experiments carried out to compare the efficacy of Betalutin(®), a novel (177)Lu-labelled antibody radionuclide conjugate for the treatment of non-Hodgkin lymphoma, to that of (177)Lu-labelled CD20-specific (rituximab) and non-specific antibodies (Erbitux) on lymphocyte B cells. The 3D cellular model developed allowed a better understanding of the radiative and non-radiative processes associated with cellular death. Our approach is generic and can also be applied to other radiopharmaceuticals and cell distributions.

  5. 精神分析学说与鲁迅%Psychoanalytic Theory and Lu Xun

    Institute of Scientific and Technical Information of China (English)

    韩志荣

    2012-01-01

    As a worldwide trend of thought, Psychoanalysis has an extensive and far--reaching impact on Chinese literary in the 20th century. Lu Xun's ideas and works have been affected by psychoanalysis, theory experienced a process from acceptance and absorption to analysis and .criticism. Then, elements as theoretical weapons, and used it to reveal social problems profoundly. This process the works of Lu Xun. and his he drew acceptance of the on the reasonable of change can be seen from%精神分析学说作为一种世界性思潮,对20世纪的中国文坛产生了广泛而深远的影响。鲁迅先生的思想和作品也曾受到精神分析学说的影响,并且对它的接受经历了一个过程,从接纳吸收到分析批判,再到借鉴其中的合理成分,作为战斗的武器,用它来深刻地揭示社会问题。这一转变过程我们从鲁迅先生的作品中可以看出。

  6. Realistic multi-cellular dosimetry for 177Lu-labelled antibodies: model and application

    Science.gov (United States)

    Marcatili, S.; Pichard, A.; Courteau, A.; Ladjohounlou, R.; Navarro-Teulon, I.; Repetto-Llamazares, A.; Heyerdahl, H.; Dahle, J.; Pouget, J. P.; Bardiès, M.

    2016-10-01

    Current preclinical dosimetric models often fail to take account of the complex nature of absorbed dose distribution typical of in vitro clonogenic experiments in targeted radionuclide therapy. For this reason, clonogenic survival is often expressed as a function of added activity rather than the absorbed dose delivered to cells/cell nuclei. We designed a multi-cellular dosimetry model that takes into account the realistic distributions of cells in the Petri dish, for the establishment of survival curves as a function of the absorbed dose. General-purpose software tools were used for the generation of realistic, randomised 3D cell culture geometries based on experimentally determined parameters (cell size, cell density, cluster density, average cluster size, cell cumulated activity). A mixture of Monte Carlo and analytical approaches was implemented in order to achieve as accurate as possible results while reducing calculation time. The model was here applied to clonogenic survival experiments carried out to compare the efficacy of Betalutin®, a novel 177Lu-labelled antibody radionuclide conjugate for the treatment of non-Hodgkin lymphoma, to that of 177Lu-labelled CD20-specific (rituximab) and non-specific antibodies (Erbitux) on lymphocyte B cells. The 3D cellular model developed allowed a better understanding of the radiative and non-radiative processes associated with cellular death. Our approach is generic and can also be applied to other radiopharmaceuticals and cell distributions.

  7. End-pumped all solid-state high repetition rate Tm, Ho:LuLF laser

    Institute of Scientific and Technical Information of China (English)

    Shijiang Shu; Ting Yu; Junyan Hou; Rongtao Liu; Minjie Huang; Weibiao Chen

    2011-01-01

    @@ The characteristics of diode end-pumped Tm,Ho:LuLiF for continuous wave (CW) running and high pulse repetition frequency (PRF) Q-switched operation are illustrated. In the CW mode, 950-mW output power with a slope efficiency of 24% is obtained. In the Q-switched mode, output energy of 78 μJ under 10 kHz with a slope efficiency of 23% is achieved. The pulse stability, pulse width as a function of pump intensity, and spectral characteristics are also analyzed.%The characteristics of diode end-pumped Tm,Ho:LuLiF for continuous wave (CW) running and high pulse repetition frequency (PRF) Q-switched operation are illustrated. In the CW mode, 950-mW output power with a slope efficiency of 24% is obtained. In the Q-switched mode, output energy of 78μJ under 10 kHz with a slope efficiency of 23% is achieved. The pulse stability, pulse width as a function of pump intensity, and spectral characteristics are also analyzed.

  8. Composition and hygroscopicity of aerosol particles at Mt. Lu in South China: Implications for acid precipitation

    Science.gov (United States)

    Li, Weijun; Chi, Jianwei; Shi, Zongbo; Wang, Xinfeng; Chen, Bin; Wang, Yan; Li, Tao; Chen, Jianmin; Zhang, Daizhou; Wang, Zifa; Shi, Chune; Liu, Liangke; Wang, Wenxing

    2014-09-01

    Physicochemical properties of aerosol particles were studied at Mt. Lu, an elevated site (115°59‧E, 29°35‧N, 1165 m) within the acid precipitation area. Northeast winds transport copious amounts of air pollutants and water vapor from the Yangtze River Delta into this acid precipitation area. NH4+ and SO42- are the dominant ions in PM2.5 and determine aerosol acidity. Individual particle analysis shows abundant S-rich and metals (i.e. Fe-, Zn-, Mn-, and Pb-rich) particles. Unlike aerosol particles in North China and urban areas, there are little soot and mineral particles at Mt. Lu. Lack of mineral particles contributed to the higher acidity in precipitation in the research area. Nano-sized spherical metal particles were observed to be embedded in 37% of S-rich particles. These metal particles were likely originated from heavy industries and fired-power plants. Hygroscopic experiments show that most particles start to deliquesce at 73-76% but organic coating lowers the particle deliquescence relative humidity (DRH) to 63-73%. The DRHs of these aerosol particles are clearly smaller than that of pure ammonium sulfate particles which is 80%. Since RH in ambient air was relatively high, ranging from 65% to 85% during our study period, most particles at our sampling site were in liquid phase. Our results suggest that liquid phase reactions in aerosol particles may contribute to SO2 to sulfuric acid conversion in the acid precipitation area.

  9. Reducing Renal Uptake of {sup 177}Lu Labeled CCK Derivative using Basic Amino Acids

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Soyoung; Lim, Jaecheong; Joh, Eunha [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)

    2014-05-15

    Radiolabeled peptides have been designed to target the relative receptors overespressed in tumor cells, such as integrin αvβ3, gastrin-releasing peptide receptor (GRPR), melanocortin-1 receptor (MC1-R), glucagon-like peptide-a receptor (GLP-1R), and cholecystokinin (CCK) receptor. Most of these peptides are eliminated from the body via the kidney and are partly reabsorbed in the proximal tubular cells. However, the high renal uptake of the radiolabeled peptides may lead to renal toxicity. In this study we investigated various amino acid solutions to reduce the renal uptake of {sup 177}Lu-DOTA-CCK derivative. Renal uptake of {sup 177}Lu-DOTA-CCK derivative is effectively reduced by the administration of positively charged amino acids. The administration of 12 mg of L-lysine was as effective in reducing the renal uptake as 6 mg of lysine and 6 mg of arginine combinations. Further studies will be performed to identify the most potent inhibitor of renal reuptake of radiolabeled peptides and minimize the chance of unwanted side effects.

  10. Lu Huiniang

    Institute of Scientific and Technical Information of China (English)

    1994-01-01

    en Canruo estis bela jun-ulo.Mal-sanofor-prenis vivon de lia edz-ino(anka tre bela).Foje li vizitis allan urbon.Sur-voje li vidisbel-egan vir-inon.ia belo kaptis lin,ke linepovis vidi aliajn aferojn.Li tuj sekvis in.i detempo al tempo re-turn-iSis por vidi lin,kun

  11. Ways of Viewing Pictorial Plasticity

    Directory of Open Access Journals (Sweden)

    Maarten W. A. Wijntjes

    2017-03-01

    Full Text Available The plastic effect is historically used to denote various forms of stereopsis. The vivid impression of depth often associated with binocular stereopsis can also be achieved in other ways, for example, using a synopter. Accounts of this go back over a hundred years. These ways of viewing all aim to diminish sensorial evidence that the picture is physically flat. Although various viewing modes have been proposed in the literature, their effects have never been compared. In the current study, we compared three viewing modes: monocular blur, synoptic viewing, and free viewing (using a placebo synopter. By designing a physical embodiment that was indistinguishable for the three experimental conditions, we kept observers naïve with respect to the differences between them; 197 observers participated in an experiment where the three viewing modes were compared by performing a rating task. Results indicate that synoptic viewing causes the largest plastic effect. Monocular blur scores lower than synoptic viewing but is still rated significantly higher than the baseline conditions. The results strengthen the idea that synoptic viewing is not due to a placebo effect. Furthermore, monocular blur has been verified for the first time as a way of experiencing the plastic effect, although the effect is smaller than synoptic viewing. We discuss the results with respect to the theoretical basis for the plastic effect. We show that current theories are not described with sufficient details to explain the differences we found.

  12. Vascular plasticity in cerebrovascular disorders

    DEFF Research Database (Denmark)

    Edvinsson, Lars I H; Povlsen, Gro Klitgaard

    2011-01-01

    Cerebral ischemia remains a major cause of morbidity and mortality with little advancement in subacute treatment options. This review aims to cover and discuss novel insight obtained during the last decade into plastic changes in the vasoconstrictor receptor profiles of cerebral arteries and micr...

  13. American Society of Plastic Surgeons

    Science.gov (United States)

    ... know the risks and trust a board-certified plastic surgeon to perform your cosmetic or reconstructive surgery. ASPS member surgeons have the training and experience that ... 1300 Chain Bridge Road McLean, VA 22101 (703) 790-5454 Timothy Germain ...

  14. Biobased plastics in a bioeconomy.

    Science.gov (United States)

    Philp, J C; Ritchie, R J; Guy, K

    2013-02-01

    Bioeconomy plans include a biobased industries sector in which some oil-derived plastics and chemicals are replaced by new or equivalent products derived, at least partially, from biomass. Some of these biobased products are here today, but to fulfil their societal potential, greater attention is required to promote awareness, and to improve their market share while making valuable contributions to climate change mitigation.

  15. Field based plastic contamination sensing

    Science.gov (United States)

    The United States has a long-held reputation of being a dependable source of high quality, contaminant-free cotton. Recently, increased incidence of plastic contamination from sources such as shopping bags, vegetable mulch, surface irrigation tubing, and module covers has threatened the reputation o...

  16. Plasticity Theory of Fillet Welds

    DEFF Research Database (Denmark)

    Hansen, Thomas

    2005-01-01

    This paper deals with simple methods for calculation of fillet welds based on the theory of plasticity. In developing the solutions the lower-bound theorem is used. The welding material and parts of the base material are subdivided into triangular regions with homogeneous stress fields; thereby...

  17. For the Classroom: "Plastic" Jellyfish.

    Science.gov (United States)

    Current: The Journal of Marine Education, 1989

    1989-01-01

    Describes an activity in which students monitor the plastic waste production in their households, research its effects on freshwater and marine life, and propose ways to lessen the problem. Provides objectives, background information, materials, procedures, extension activities, and an evaluation for students. (Author/RT)

  18. Oxytocin and Maternal Brain Plasticity

    Science.gov (United States)

    Kim, Sohye; Strathearn, Lane

    2016-01-01

    Although dramatic postnatal changes in maternal behavior have long been noted, we are only now beginning to understand the neurobiological mechanisms that support this transition. The present paper synthesizes growing insights from both animal and human research to provide an overview of the plasticity of the mother's brain, with a particular…

  19. Making sense of plastics recycling

    NARCIS (Netherlands)

    Van Bruggen, E.; Koster, R.P.; Rageart, K.; Cardon, L.; Moerman, M.; Blessing, E.

    2012-01-01

    Major benefits of plastics recycling are reduced depletion of non-renewable resources and reduction of world-wide waste. Traditional thermo-mechanical recycling causes reduction of mechanical properties for most thermoplastics. Down-cycled materials may nevertheless be suited for certain useful appl

  20. Occupational doses in neuroendocrine tumors by using {sup 177}Lu DOTATATE; Doses ocupacionais em tratamento de tumores neuroendocrinos utilizando {sup 17'}7Lu DOTATATE

    Energy Technology Data Exchange (ETDEWEB)

    Costa, Gustavo Coelho Alves; Sa, Lidia Vasconcellos de, E-mail: gustavo@ird.gov.b, E-mail: lidia@ird.gov.b [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil)

    2011-10-26

    This paper investigated the treatment of neuroendocrine tumors (abdominal tumors) using of {sup 177}Lu DOTATATE radiopharmaceutical which is a type of treatment presently used in the experimental form in Brazil and, therefore, not contemplated in norms or specific use. This research studied the occupational doses of this treatment and suggested guidelines or rules of procedures viewing the radiological protection of workers involved and the public. The treatment were followed up by using two types of radiation detection, one a scintillator and a Geiger-Muller, and the measurements were performed in a public hospital at Rio de Janeiro and the other in a private hospital at Sao Paulo. It was observed that the equivalent occupational doses can variate from 160 {mu}Sv to 450 {mu}Sv, in function of operator, of stage of manipulation, and of the administration method, which can be through the use of infusion pump or manual injection. The use of infusion pump is highly recommended and the hospitalization of the patient until the dose rate measured at 1 m does not surpass 20 {mu}Sv/h

  1. Plastic Surgeons Often Miss Patients' Mental Disorders

    Science.gov (United States)

    ... More Health News on: Mental Disorders Plastic and Cosmetic Surgery Recent Health News Related MedlinePlus Health Topics Mental Disorders Plastic and Cosmetic Surgery About MedlinePlus Site Map FAQs Customer Support Get ...

  2. Lecture notes on Elasto-plastic materials

    DEFF Research Database (Denmark)

    Hededal, Ole

    2007-01-01

    Brief introduction to material modelling within the framework of rate independent elasto-plastic constitutive modelling......Brief introduction to material modelling within the framework of rate independent elasto-plastic constitutive modelling...

  3. Phenotypic plasticity with instantaneous but delayed switches

    NARCIS (Netherlands)

    Utz, Margarete; Jeschke, Jonathan M.; Loeschcke, Volker; Gabriel, Wilfried

    2014-01-01

    Phenotypic plasticity is a widespread phenomenon, allowing organisms to better adapt to changing environments. Most empirical and theoretical studies are restricted to irreversible plasticity where the expression of a specific phenotype is mostly determined during development. However, reversible pl

  4. Interpretation on Recycling Plastics from Shredder Residue

    Science.gov (United States)

    EPA is considering an interpretation of its regulations that would generally allow for recycling of plastic separated from shredder residue under the conditions described in the Voluntary Procedures for Recycling Plastics from Shredder Residue.

  5. Developmental plasticity and evolution--quo vadis?

    National Research Council Canada - National Science Library

    Moczek, A P

    2015-01-01

    The role of developmental (phenotypic) plasticity in ecology and evolution is receiving a growing appreciation among the biologists, and many plasticity-specific concepts have become well established as part of the mainstream evolutionary...

  6. Gas Experiments with Plastic Soda Bottles.

    Science.gov (United States)

    Kavanah, Patrick; Zipp, Arden P.

    1998-01-01

    Describes the use of an inexpensive device consisting of a plastic soda bottle and a modified plastic cap in a range of demonstrations and experimental activities having to do with the behavior of gases. (Author/WRM)

  7. [The history of plastic surgery in Israel].

    Science.gov (United States)

    Wiser, Itay; Scheflan, Michael; Heller, Lior

    2014-09-01

    The medical institutions in the country have advanced together with the development of the state of Israel. Plastic surgery, which has progressed significantly during the 20th century, has also grown rapidly in the new state. The arrival of Jewish plastic surgeons from all over the world with the knowledge and experience gained in their countries of origin, as well as the need for reconstructive surgical treatment for many combat injured soldiers, also contributed to the development of plastic surgery. This review tells the story of plastic surgery in Israel, since its foundation until nowadays. This article reviews the work of the founders of plastic surgery in Israel, indicating significant milestones in its development, and clinical and scientific contribution to the international plastic surgery profession. Moreover, the article describes the current condition of the field of plastic surgery in Israel and presents the trends and the future challenges facing the next generation of plastic surgery in Israel.

  8. Innovation Promotes Development of Plastic Assistant

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    @@ Driven by the rapid growth of China's plastic product sector, the development of the plastic sector has been accelerated and assistant products are now becoming more multi-function, high performance, high in molecular weight and environmentfriendly.

  9. ARE PLASTIC GROCERY BAGS SACKING THE ENVIRONMENT?

    Directory of Open Access Journals (Sweden)

    Mangal Gogte

    2009-12-01

    Full Text Available This paper is oriented on analysis impacts of plastic bags on environment. In this paper is analyzed did plastic bags are so harmful, and what are the main ingredients of it. One part of this paper is oriented on effects of plastic bags and management of their usage. There is also made comparative analysis between impacts of plastic and paper bags on environment.

  10. Economical and Ecological Fesasibility of Plastic Recycling

    OpenAIRE

    Hirschpold, Andrew; Juctye, Kristina; Renzhong, Jiang; Debin, LIU; Varona, Hector P.; Kevelaitis, Karolis

    2005-01-01

    #Group 3 International Nat Bas Economical and Ecological Feasibility of Plastic Recycling Abstract This project is carried out as the final project for the first semester of Bachelor of Science studies. Our project will aim on plastic recycling. Plastic is a manmade material which covers a range of synthetic or semi-synthetic products made thru polymerization. The development of plastic products has accompanied the development of human’s history since it was invented while they ...

  11. WE(EE) Demand - Recycled Plastic

    OpenAIRE

    Førby, Marie; Pedersen, Jakob; Borgen, Nanna; Hansen, Rasmus Nør

    2015-01-01

    Plastic management – from production to waste – has massive negative effects on the environment of which one of the main problems are the CO2 released from the fossil fuels. The focus of this paper lies on the possibilities of increasing demand for recycled plastics from electric and electronic equipment (WEEE-plastic) through modifications in the Danish waste systems. Due to the chemical build of plastic, it is not possible to reprocess it with mechanical recycle technologies while keeping t...

  12. Think small: nanotechnology for plastic surgeons.

    Science.gov (United States)

    Nasir, Amir R; Brenner, Sara A

    2012-11-01

    The purpose of this article is to introduce the topic of nanotechnology to plastic surgeons and to discuss its relevance to medicine in general and plastic surgery in particular. Nanotechnology will be defined, and some important historical milestones discussed. Common applications of nanotechnology in various medical and surgical subspecialties will be reviewed. Future applications of nanotechnology to plastic surgery will be examined. Finally, the critical field of nanotoxicology and the safe use of nanotechnology in medicine and plastic surgery will be addressed.

  13. The advent of the restorative plastic surgeon.

    Science.gov (United States)

    Carty, Matthew J; Pribaz, Julian J; Talbot, Simon G; Caterson, Edward J; Pomahac, Bohdan

    2014-01-01

    Plastic surgery is presently typified by the existence of discrete clinical identities, namely that of the cosmetic plastic surgeon and the reconstructive plastic surgeon. The emergence of vascularized composite allotransplantation has been accompanied by the development of a third distinct clinical identity, that of the restorative plastic surgeon. The authors describe the core competencies that characterize this new identity, and discuss the implications of the advent of this new professional paradigm.

  14. Economical and Ecological Fesasibility of Plastic Recycling

    OpenAIRE

    Hirschpold, Andrew; Juctye, Kristina; Renzhong, Jiang; Debin, Liu; Varona, Hector P.; Kevelaitis, Karolis

    2005-01-01

    #Group 3 International Nat Bas Economical and Ecological Feasibility of Plastic Recycling Abstract This project is carried out as the final project for the first semester of Bachelor of Science studies. Our project will aim on plastic recycling. Plastic is a manmade material which covers a range of synthetic or semi-synthetic products made thru polymerization. The development of plastic products has accompanied the development of human’s history since it was invented while they ...

  15. Will Banning Free Plastic Bags Reduce Pollution?

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    No more free plastic bags from June 1,2008.That’s the message to Chinese shoppers after a government ban on all production,sales or use of plastic bags less than 0.025 mm thick comes into force from this date.Nowadays,supermarkets give out 1 billion plastic bags every day while other shops collectively use double that amount. Consumers will have to pay for plastic bags exceeding this thickness,if they want this option.

  16. Effect of Mg co-doping on cathodoluminescence properties of LuGAGG:Ce single crystalline garnet films

    Science.gov (United States)

    Schauer, P.; Lalinský, O.; Kučera, M.; Lučeničová, Z.; Hanuš, M.

    2017-10-01

    Mg2+ co-doped (LuGd)3(GaAl)5O12:Ce (LuGAGG:Ce,Mg) multicomponent single crystalline epitaxial garnet films were prepared and their cathodoluminescence (CL) and thermoluminescence (TSL) properties were studied in this paper. The films were prepared using the liquid phase epitaxy from lead-free BaO-B2O3-BaF2 flux and their scintillation properties were characterized using the 10 keV collimated e-beam. More specifically, temperature dependent CL intensity, CL emission spectra, CL decay characteristics as well as TSL emission characteristics of the mentioned films were measured. At the highest content of Mg (700 ppm), the CL decay time was as low as 28 ns and the CL afterglow was as low as 0.01% at 1 μs after the e-beam excitation cut-off, which are important parameters for electron detectors in e-beam devices. The CL temperature quenching of the studied films began above room temperature. An increase of Mg concentration to or above 280 ppm quenched the characteristic CL emission of LuGAGG:Ce,Mg. The TSL measurements show that the trap population in studied garnet samples is considerably suppressed. The LuGAGG:Ce,Mg multicomponent single crystalline epitaxial films were evaluated as the perspective fast scintillators for the electron detectors in the e-beam devices.

  17. Effects of thermal treatments on chemical composition and electrical properties of ultra-thin Lu oxide layers on Si

    NARCIS (Netherlands)

    Zenkevich, A.; Lebedinskii, Yu.; Spiga, S.; Wiemer, C.; Scarel, G.; Fanciulli, M.

    2007-01-01

    The correlation between chemical composition, layered structure evolution, and electrical properties of ultra-thin (2-5 nm) Lu oxide layers grown on chemically oxidized Si(100) and exposed to different thermal treatments was monitored by x-ray photoelectron spectroscopy, x-ray reflectivity and C-V,

  18. Siim Nestor soovitab : uute eesti plaatide esitlusõhtud! Metro Luminal. Lu : K. Metsatöll / Siim Nestor

    Index Scriptorium Estoniae

    Nestor, Siim, 1974-

    2004-01-01

    Rockansambli Metro Luminal plaadi "Reboot" esitlusest Tartu Sadamateatris 9. dets. ja Rock Café's Tallinnas 10. dets.(kaasa teeb DJ Sing). Popansambli Lu:k albumist "Raadiomaja valvelauas" ja ansambli 10. aastapäeva tähistamisest 10. dets. Tallinnas Kunstiakadeemia saalis. Ansambli Metsatöll albumi "Hiiekoda" esitlusest 11.dets. Rock Café's Tallinnas

  19. Archean Lithosphere Beneath Arctic Canada: Lu-Hf Isotope Systematics for Kimberlite-Hosted Garnet-Peridotites From Somerset Island

    Science.gov (United States)

    Schmidberger, S. S.; Simonetti, A.; Francis, D.; Gariepy, C.

    2001-05-01

    Knowledge of the age of lithospheric mantle underlying the continents provides valuable constraints for the timing of formation and stabilization of Archean cratons. This study reports Lu-Hf isotopic data for garnet-peridotites, and their constituent garnets, from the Nikos kimberlite (100 Ma) on Somerset Island in the Canadian Arctic obtained using a Micromass IsoProbe multicollector inductively coupled plasma mass spectrometer (MC-ICP-MS) at GEOTOP-UQAM. The low temperature peridotites (1100 C; 160-190 km) and their 176Hf/177Hf(0.1Ga) isotopic compositions (0.28265-0.28333; \\epsilonHf(0.1Ga)=-2 to +22) are less radiogenic than those of the shallow xenoliths. A Lu-Hf isochron for six peridotites yields a mid Archean age of 3.4\\pm0.3 Ga and an initial 176Hf/177Hf ratio of 0.28101\\pm24. The remaining peridotites (n=9), in contrast, are characterized by extremely high (+35) initial \\epsilonHf(3.4Ga) values, which correlate negatively with their 176Lu/177Hf ratios, suggesting addition of Hf as a result of metasomatic interaction with the host kimberlite. The garnets from the low temperature (3.4 Ga old) peridotites are characterized by high 176Lu/177Hf ratios and define an errorchron age of 1.4\\pm0.2 Ga, which may reflect re-equilibration of Hf during kimberlite magmatism.

  20. In-band pumping of expitaxially grown $Er:(Gd, Lu)_2O_3$ waveguides for active integrated optical devices

    NARCIS (Netherlands)

    Kahn, A.; Kühn, H.; Heinrich, S.; Gün, T.; Tellkamp, F.; Petermann, K.; Bradley, J.D.B.; Ay, F.; Wörhoff, K.; Pollnau, M.; Kuzminykh, Y.; Luo, Y.; Hoffmann, P.; Huber, G.

    2008-01-01

    Monocrystalline lattice matched Er(0.6%):(Gd, Lu)2O3 films with thicknesses up to 3 m and nearly atomically flat surfaces have been deposited on Y2O3 substrates by Pulsed Laser Deposition (PLD). The epitaxial growth has been verified in-situ by Reflection High Energy Electron Diffraction (RHEED). A

  1. Pairs of charged heavy fermions from an $SU(3)_{L}(-)U(1)_{N}$ model at $e^{+}e^{-}$ colliders

    CERN Document Server

    Cieza-Montalvo, J E; 10.1103/PhysRevD.67.075022

    2003-01-01

    We investigate the production, backgrounds, and signatures of pairs of charged heavy fermions using the SU(3)/sub L/(-)U(1)/sub N/ electroweak model in e/sup +/e/sup -/ colliders (Next Linear Collider and CERN Linear Collider). We also analyze the indirect evidence for a boson Z'. (23 refs).

  2. A density functional investigation on the electronic and magnetic properties of LnSi (Ln= La-Lu) Diatom

    Indian Academy of Sciences (India)

    Zhao Run-Ning; Chen Rui; Yuan Yan-Hong; Gu Fan; Han Ju-Guang

    2016-03-01

    Bond lengths, vibrational frequencies, electron affinities, magnetic properties, and ionization potentials of the neutral and charged LnSi (Ln=La-Lu) diatom were studied by using the density functional method with relativistic effect being taken into account. Ground state was assigned for each species. The calculated natural populations of LnSi (Ln=La-Lu) exhibit that the charges are transferred mainly from 6s2 to 5d,and most of 4f subshell in LnSi is inert without involving chemical bonding. The calculated highest occupied molecular orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gaps show that the HOMO-LUMOgaps are increased and exhibit oscillating behavior from LaSi to LuSi.Interestingly, total magnetic properties of LnSi (Ln=La-Lu)diatoms depend on the localized 4f electrons which generate the magnetic moment of LnSi diatoms; additionally, the magnetic moment of EuSi is 11 μB, which is the highest one. Comparisons with the available experimental and theoretical values are made and a good agreement is reached.

  3. Comparison of ⁹⁰Y and ¹⁷⁷Lu measurement capability in UK and European hospitals.

    Science.gov (United States)

    Fenwick, Andrew; Baker, Michaela; Ferreira, Kelley; Keightley, John

    2014-05-01

    Comparison exercises involving (90)Y and (177)Lu were performed during 2009 and 2012, respectively, to assess the measurement capability of hospitals in the UK and Europe. The results from the measurement of a typical liquid solution of (90)Y show that only 40% of participants could measure the solution to within 5% of the certificated value and that a significant -6% bias was present due to the use of non-standard geometries for the calibration of equipment. The results from the measurement of a standard liquid solution of (177)Lu show that 81% of participants could measure to within 5% of the certificated value and in fact 65% of these results were within 2% of the certificated value, showing administered activities can be far more accurately measured for (177)Lu than for (90)Y and that (177)Lu has a far smaller geometry dependence. These studies were performed to identify specific measurement issues in the user community and to identify areas where future research should be focused. In addition to this the work allows the participants to adjust measurement practice and identify key measurement issues.

  4. 鲁迅对自己杂文的两种态度%Lu Xun's Ambivalent Attitudes Towards His Essay

    Institute of Scientific and Technical Information of China (English)

    陈正敏

    2015-01-01

    通过具体材料的梳理,揭示了鲁迅杂对自己杂文的两种态度:在公开发表的文字中,鲁迅对自己的杂文极为自信,甚至自负;但在私人场合——与友人的通信里,则不断地表示对自己杂文的不满,认为自己的杂文写作只是无意义的"打杂",并非真正的创作.与此同时,鲁迅常常表示小说才是真正的创作,他很想专心于这项工作,却已无力去做.%By combing concrete materials, the author finds a noticeable phenomenon from Lu Xu's essay writing. This paper puts forward some new views on Lu Xun's essays: although Lu Xun exhibited strong confidence in his public published articles, he expressed dissatisfaction with his essays constantly in private occasions, i.e. in the letters to his friends. And he said his essay writing was something worthless rather than literary creation. At the same time, Lu Xun always hinted that the writing of fiction was real literary creation, and he wanted to concentrate on fiction writing, but he was unable to do this.

  5. Lattice dynamics of xenotime: The phonon dispersion relations and density of states of LuPO{sub 4}

    Energy Technology Data Exchange (ETDEWEB)

    Nipko, J.C.; Loong, C. [Argonne National Laboratory, Argonne, Illinois 60439-4814 (United States); Loewenhaupt, M. [Technische Universitaet Dresden, Dresden (Germany); Braden, M.; Reichardt, W. [Forschungszentrum Karlsruhe, INFP, D-76021, Karlsruhe (Germany); Boatner, L.A. [Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6056 (United States)

    1997-11-01

    LuPO{sub 4} is the nonmagnetic end member of a series of rare-earth phosphates with a common zircon-type crystal structure. The phonon-dispersion curves of LuPO{sub 4} along the [x,0,0], [x,x,0], and [0,0,x] symmetry directions were measured by neutron triple-axis spectroscopy using single-crystal samples. The phonon density of states was determined by time-of-flight neutron scattering using polycrystalline samples. Phonons involving mainly motions of rare-earth ions were found to be well separated in energy from those of the P and O vibrations. A large gap in the phonon-frequency-distribution function, which divides the O-P-O bending-type motions from the P-O stretches, was observed. All of the experimental results were satisfactorily accounted for by lattice-dynamic shell-model calculations. LuPO{sub 4} is a host material for the incorporation of rare-earth ions to produce activated luminescence. Information regarding the phonon and thermodynamic properties of LuPO{sub 4} is pertinent to extended investigations of additional rare-earth spin-lattice interactions in other zircon-structure rare-earth orthophosphates. {copyright} {ital 1997} {ital The American Physical Society}

  6. Siim Nestor soovitab : uute eesti plaatide esitlusõhtud! Metro Luminal. Lu : K. Metsatöll / Siim Nestor

    Index Scriptorium Estoniae

    Nestor, Siim, 1974-

    2004-01-01

    Rockansambli Metro Luminal plaadi "Reboot" esitlusest Tartu Sadamateatris 9. dets. ja Rock Café's Tallinnas 10. dets.(kaasa teeb DJ Sing). Popansambli Lu:k albumist "Raadiomaja valvelauas" ja ansambli 10. aastapäeva tähistamisest 10. dets. Tallinnas Kunstiakadeemia saalis. Ansambli Metsatöll albumi "Hiiekoda" esitlusest 11.dets. Rock Café's Tallinnas

  7. Crystal Structure and Thermal Expansion Properties of Lu_(2-x)Fe_xMo_3O_(12)

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    Low or zero thermal expansion materials have a lot of potential applications in space shuttle, microelectronic components, and optical mirrors et al. Polycrystalline samples Lu2-xFexMo3O12 have been prepared successfully by solid state reaction,

  8. Effect of Lu2O3 on Charge/discharge Performances of Spherical Nickel Hydroxide at High Temperature

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    Nickel-metal hydride (Ni/MH) batteries are one of promising batteries for electric vehicle applications, but at high temperature the charge efficiency of nickel electrode is very low. In order to improve the high-temperature-efficiency of nickel electrode, spherical nickel hydroxide mixed with various ratios of Lu2O3 was used as active material of pasted nickel electrodes. The results of charge/discharge experiments, cyclic voltammetric measurements and XRD characterizations have shown that after addition of Lu2O3, the oxygen evolution overpotential is elevated much, the charge efficiency of nickel electrode at high temperature is greatly improved and the content of β-NiOOH phase increases in charged electrodes. In addition, the mixed ratio of Lu2O3 has different effects on high temperature performances of nickel electrode at different charge/discharge currents, 3.5 % is the optimum mixed ratio, and the action of Lu2O3 on high temperature electrochemical behaviors is more apparent when nickel electrodes are charged at small current than large current.

  9. Relativistic many-body calculation of energies, lifetimes, polarizabilities, blackbody radiative shift, and hyperfine constants in Lu2 +

    Science.gov (United States)

    Safronova, U. I.; Safronova, M. S.; Johnson, W. R.

    2016-09-01

    Energy levels of 30 low-lying states of Lu2 + and allowed electric-dipole matrix elements between these states are evaluated using a relativistic all-order method in which all single, double, and partial triple excitations of Dirac-Fock wave functions are included to all orders of perturbation theory. Matrix elements are critically evaluated for their accuracy and recommended values of the matrix elements are given together with uncertainty estimates. Line strengths, transition rates, and lifetimes of the metastable 5 d3 /2 and 5 d5 /2 states are calculated. Recommended values are given for static polarizabilities of the 6 s , 5 d , and 6 p states and tensor polarizabilities of the 5 d and 6 p3 /2 states. Uncertainties of the polarizability values are estimated in all cases. The blackbody radiation shift of the 6 s1 /2-5 d5 /2 transition frequency of the Lu2 + ion is calculated with the aid of the recommended scalar polarizabilities of the 6 s1 /2 and 5 d5 /2 states. Finally, A and B hyperfine constants are determined for states of 2+175Lu with n ≤9 . This work provides recommended values of transition matrix elements, polarizabilities, and hyperfine constants of Lu2 +, critically evaluated for accuracy, for benchmark tests of high-precision theoretical methodology and planning of future experiments.

  10. Gamma induced atom displacements in LYSO and LuYAP crystals as used in medical imaging applications

    Energy Technology Data Exchange (ETDEWEB)

    Piñera, Ibrahin, E-mail: ipinera@ceaden.edu.cu [Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear, CEADEN, 30 St. 502, Playa 11300, Havana (Cuba); Cruz, Carlos M.; Abreu, Yamiel; Leyva, Antonio [Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear, CEADEN, 30 St. 502, Playa 11300, Havana (Cuba); Van Espen, Piet [University of Antwerp, CGB, Groenenborgerlaan 171, 2020 Antwerpen (Belgium); Díaz, Angelina; Cabal, Ana E. [Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear, CEADEN, 30 St. 502, Playa 11300, Havana (Cuba); Van Remortel, Nick [University of Antwerp, CGB, Groenenborgerlaan 171, 2020 Antwerpen (Belgium)

    2015-08-01

    The radiation damage, in terms of atom displacements, induced by gamma irradiation in LYSO and LuYAP crystals is presented. {sup 44}Sc, {sup 22}Na and {sup 48}V are used as gamma sources for this study. The energy of gammas from the electron–positron annihilation processes (511 keV) is also included in the study. The atom displacements distributions inside each material are calculated following the Monte Carlo assisted Classical Method introduced by the authors. This procedure also allows to study the atom displacements in-depth distributions inside each crystal. The atom displacements damage in LYSO crystals is found to be higher than in LuYAP crystals, mainly provoked by the displacements of silicon and oxygen atoms. But the difference between atom displacements produced in LYSO and LuYAP decreases when more energetic sources are used. On the other hand, the correlation between the atom displacements and energy deposition in-depth distributions is excellent. The atom displacements to energy deposition ratio is found to increases with more energetic photon sources. LYSO crystals are then more liable to the atom displacements damage than LuYAP crystals.

  11. Hypocalcaemia after treatment with [{sup 177}Lu-DOTA{sup 0},Tyr{sup 3}]octreotate

    Energy Technology Data Exchange (ETDEWEB)

    Vliet, Esther I. van; Kam, Boen L.R.; Teunissen, Jaap J.M.; Krenning, Eric P.; Kwekkeboom, Dik J. [Erasmus MC, University Medical Center, Department of Nuclear Medicine, Rotterdam (Netherlands); Herder, Wouter W. de; Zillikens, M.C.; Peeters, Robin P. [Erasmus MC, University Medical Center, Department of Internal Medicine, Rotterdam (Netherlands); Rijke, Yolanda B. de [Erasmus MC, University Medical Center, Department of Clinical Chemistry, Rotterdam (Netherlands)

    2013-12-15

    The aim of this study was to explore the possible mechanisms involved in an observed decline in serum calcium levels in patients with a neuroendocrine tumour (NET) treated with [{sup 177}Lu-DOTA{sup 0},Tyr{sup 3}]octreotate ({sup 177}Lu-octreotate). In 47 patients with NET who were normocalcaemic at baseline, serum calcium, albumin, creatinine, alkaline phosphatase, gamma glutamyl transpeptidase, magnesium, phosphate and 25-hydroxyvitamin D were prospectively analysed at baseline and up to 6 months after treatment. Parathyroid hormone (PTH), 1,25-dihydroxyvitamin D{sub 3}, type 1 aminoterminal propeptide of procollagen, bone-specific alkaline phosphatase, carboxyterminal crosslinking telopeptide of bone collagen, collagen type I crosslinked N-telopeptide, and creatinine and calcium in 24-h urine samples, were evaluated at baseline and at 3 and 6 months. Another 153 patients with NET were included in a retrospective study to estimate the occurrence of hypocalcaemia in a larger patient group. In the prospectively included patients, the mean serum calcium level decreased significantly after treatment (2.31 {+-} 0.01 to 2.26 {+-} 0.02 mmol/l, p = 0.02). Eight patients (17 %) showed a marked decrease in serum calcium levels with a nadir of {<=}2.10 mmol/l. In five patients (11 %), calcium substitution therapy was prescribed. PTH increased significantly (5.9 {+-} 0.6 to 6.7 {+-} 0.8 pmol/l, p = 0.02), presumably in response to the decreasing serum calcium levels. 25-Hydroxyvitamin D remained stable after treatment. Creatinine levels increased significantly (73 {+-} 3 to 77 {+-} 3 {mu}mol/l, p = 0.01), but not enough to explain the hypocalcaemia. Phosphate levels remained unaffected. In the retrospectively analysed patients, the mean serum calcium level decreased significantly from 2.33 {+-} 0.01 at baseline to a nadir of 2.24 {+-} 0.01 mmol/l at 18 months after treatment (p < 0.001). Of the 153 patients, 33 (22 %) showed a serum calcium nadir of {<=}2.10 mmol/l, and 11

  12. Potential Biomarkers for Radiation-Induced Renal Toxicity following 177Lu-Octreotate Administration in Mice.

    Directory of Open Access Journals (Sweden)

    Emil Schüler

    Full Text Available The kidneys are one of the main dose-limiting organs in peptide receptor radionuclide therapy and due to large inter-individual variations in renal toxicity, biomarkers are urgently needed in order to optimize therapy and reduce renal tissue damage. The aim of this study was to investigate the transcriptional, functional, and morphological effects on renal tissue after 177Lu-octreotate administration in normal mice, and to identify biomarkers for radiation induced renal toxicity.C57BL/6N mice were i.v. injected with 0, 30, 60, 90, 120, or 150 MBq 177Lu-octreotate (0, 16, 29, 40, 48, and 54 Gy to the kidneys. At 4, 8, and 12 months after administration, radiation-induced effects were evaluated in relation to (a global transcriptional variations in kidney tissues, (b morphological changes in the kidneys, (c changes in white and red blood cell count as well as blood levels of urea, and (d changes in renal function using 99mTc-DTPA/99mTc-DMSA scintigraphy.In general, the highest number of differentially regulated transcripts was observed at 12 months after administration. The Cdkn1a, C3, Dbp, Lcn2, and Per2 genes displayed a distinct dose-dependent regulation, with increased expression level with increasing absorbed dose. Ifng, Tnf, and Il1B were identified as primary up-stream regulators of the recurrently regulated transcripts. Furthermore, previously proposed biomarkers for kidney injury and radiation damage were also observed. The functional investigation revealed reduced excretion of 99mTc-DTPA after 150 MBq, an increased uptake of 99mTc-DMSA at all dose levels compared with the controls, and markedly increased urea level in blood after 150 MBq at 12 months.Distinct dose-response relationships were found for several of the regulated transcripts. The Cdkn1a, Dbp, Lcn2, and Per2 genes are proposed as biomarkers for 177Lu-octreotate exposure of kidney. Correlations to functional and morphological effects further confirm applicability of these

  13. Plastics. A Handbook for Workplace Educators.

    Science.gov (United States)

    Curry, Donna; Smith, Mikki

    This handbook was designed to help adult literacy education teachers to understand the plastics industry, develop a curriculum, and teach basic skills classes in a plastics company. The book contains four main sections. The first section, on the basics of plastics, contains a brief history of the industry, an elementary description of the…

  14. 7 CFR 58.326 - Plastic cream.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 3 2010-01-01 2010-01-01 false Plastic cream. 58.326 Section 58.326 Agriculture... Material § 58.326 Plastic cream. To produce plastic cream eligible for official certification, the quality of the cream used shall meet the requirements of cream acceptable for the manufacture of U.S....

  15. Adult myelination:wrapping up neuronal plasticity

    Institute of Scientific and Technical Information of China (English)

    Megan ORourke; Robert Gasperini; Kaylene M.Young

    2014-01-01

    In this review, we outline the major neural plasticity mechanisms that have been identiifed in the adult central nervous system (CNS), and offer a perspective on how they regulate CNS function. In particular we examine how myelin plasticity can operate alongside neurogenesis and synaptic plasticity to inlfuence information processing and transfer in the mature CNS.

  16. The evolution of age-dependent plasticity

    NARCIS (Netherlands)

    Fischer, Barbara; van Doorn, G. Sander; Dieckmann, Ulf; Taborsky, Barbara

    2014-01-01

    When organisms encounter environments that are heterogeneous in time, phenotypic plasticity is often favored by selection. The degree of such plasticity can vary during an organism''s lifetime, but the factors promoting differential plastic responses at different ages or life stages remain poorly un

  17. 75 FR 34170 - Plastic Omnium Automotive Exteriors, LLC, Anderson, SC; Plastic Omnium Automotive Exteriors, LLC...

    Science.gov (United States)

    2010-06-16

    ... Employment and Training Administration Plastic Omnium Automotive Exteriors, LLC, Anderson, SC; Plastic Omnium... Assistance on March 18, 2010, applicable to workers of Plastic Omnium Automotive Exteriors, LLC, Anderson... have occurred involving workers in support of the Anderson, South Carolina location of Plastic...

  18. Plastic deformation and contact area of an elastic-plastic contact of ellipsoid bodies after unloading

    NARCIS (Netherlands)

    Jamari, Jamari; Schipper, Dirk J.

    2007-01-01

    This paper presents theoretical and experimental results of the residual or plastic deformation and the plastic contact area of an elastic–plastic contact of ellipsoid bodies after unloading. There are three regime responses of the deformation and contact area: elastic, elastic–plastic and fully

  19. Anti-EGFRvIII monoclonal antibody armed with {sup 177}Lu: in vivo comparison of macrocyclic and acyclic ligands

    Energy Technology Data Exchange (ETDEWEB)

    Hens, Marc; Vaidyanathan, Ganesan; Zhao Xiaoguang [Department of Radiology, Duke University Medical Center, Durham, NC 27710 (United States); Bigner, Darell D. [Department of Pathology, Duke University Medical Center, Durham, NC 27710 (United States); Zalutsky, Michael R., E-mail: zalut001@mc.duke.ed [Department of Radiology, Duke University Medical Center, Durham, NC 27710 (United States)

    2010-10-15

    Introduction: Monoclonal antibody (mAb) L8A4 binds specifically to the epidermal growth factor receptor variant III (EGFRvIII) that is present on gliomas but not on normal tissues, and is internalized rapidly after receptor binding. Because of the short range of its {beta}-emissions, labeling this mAb with {sup 177}Lu would be an attractive approach for the treatment of residual tumor margins remaining after surgical debulking of brain tumors. Materials and Methods: L8A4 mAb was labeled with {sup 177}Lu using the acyclic ligands [(R)-2-amino-3-(4-isothiocyanatophenyl)propyl]-trans-(S,S)-cyclohexane-1, 2-diamine-pentaacetic acid (CHX-A''-DTPA) and 2-(4-isothiocyanatobenzyl)-6-methyldiethylene-triaminepentaacetic acid (1B4M-DTPA), and the macrocyclic ligands S-2-(4-isothiocyanatobenzyl)-1,4,7,10-tetraazacyclododecane-tetraacetic acid (C-DOTA) and {alpha}-(5-isothiocyanato-2-methoxyphenyl)-1,4,7,10-tetraazacyclododecane-1,4,7, 10-tetraacetic acid (MeO-DOTA). Paired-label tissue distribution experiments were performed in athymic mice bearing subcutaneous EGFRvIII-expressing U87.{Delta}EGFR glioma xenografts over a period of 1 to 8 days to directly compare {sup 177}Lu-labeled L8A4 to L8A4 labeled with {sup 125}I using N-succinimidyl 4-guanidinomethyl-3-[{sup 125}I]iodobenzoate ([{sup 125}I]SGMIB). Results: Except with C-DOTA, tumor uptake for the {sup 177}Lu-labeled mAb was significantly higher than the co-administered radioiodinated preparation; however, this was also the case for spleen, liver, bone and kidneys. Tumor/normal tissue ratios for {sup 177}Lu-1B4M-DTPA-L8A4 and, to an even greater extent, {sup 177}Lu-MeO-DOTA-L8A4 were higher than those for [{sup 125}I]SGMIB-L8A4 in most other tissues. Conclusions: Tumor and normal tissue distribution patterns for this anti-EGFRvIII mAb were dependent on the nature of the bifunctional chelate used for {sup 177}Lu labeling. Optimal results were obtained with 1B4M-DTPA and MeO-DOTA, suggesting no clear advantage

  20. Strain rate dependence in plasticized and un-plasticized PVC

    Directory of Open Access Journals (Sweden)

    Siviour C.R.

    2012-08-01

    Full Text Available An experimental and analytical investigation has been made into the mechanical behaviour of two poly (vinyl chloride (PVC polymers – an un-plasticized PVC and a diisononyl phthalate (DINP-plasticized PVC. Measurements of the compressive stress-strain behaviour of the PVCs at strain rates ranging from 10−3 to 103s−1 and temperatures from − 60 to 100∘C are presented. Dynamic Mechanical Analysis was also performed in order to understand the material transitions observed in compression testing as the strain rate is increased. This investigation develops a better understanding of the interplay between the temperature dependence and rate dependence of polymers, with a focus on locating the temperature and rate-dependent material transitions that occur during high rate testing.