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Dissertations / Theses on the topic 'Sagittario'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Fiorillo, Claudia Maria Toffanelli [UNESP]. "Controle biológico de Sagittaria montevidensis com Cylindrocarpon sp." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/105285.

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Made available in DSpace on 2014-06-11T19:33:40Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-07-11Bitstream added on 2014-06-13T20:25:33Z : No. of bitstreams: 1 fiorillo_cmt_dr_jabo.pdf: 399101 bytes, checksum: 0abac3d781532f7b3d6e83aad7d31df7 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Funep/Light<br>Sagittaria montevidensis é uma planta aquática emergente, de difícil controle desde que se tornou problemática em arroz irrigado. Infestante em corpos hídricos de usinas hidrelétricas, o biocontrole com o fungo Cylindrocarpon sp. empregado na estrat

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Fiorillo, Claudia Maria Toffanelli. "Controle biológico de Sagittaria montevidensis com Cylindrocarpon sp. /." Jaboticabal : [s.n.], 2007. http://hdl.handle.net/11449/105285.

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Orientador: Robinson Antonio Pitelli<br>Banca: Rita de Cassia Panizzi<br>Banca: Margarete Camargo<br>Banca: Glaucia de Figueiredo Nachtigal<br>Banca: Marta Cecília Malassen Nemoto<br>Resumo: Sagittaria montevidensis é uma planta aquática emergente, de difícil controle desde que se tornou problemática em arroz irrigado. Infestante em corpos hídricos de usinas hidrelétricas, o biocontrole com o fungo Cylindrocarpon sp. empregado na estratégia inundativa, tem sido sugerido para manejo dessa macrófita onde o uso do controle químico tem se mostrado ineficiente devido ao desenvolvimento de resistênc

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Rodrigues, Sheyla Alves. "Efeito ansiolítico do extrato etanólico de Pluchea sagittalis (Lam.) Cabrera, Asteraceae, em modelos comportamentais." Universidade Federal de Sergipe, 2011. https://ri.ufs.br/handle/riufs/3274.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Pluchea sagittalis (Lam.) Cabrera, Asteraceae, popularly known as quitoco, arnica, yerba lucera. Its stem and leaves are used in infusion to treat body pain, inflammation, nervous dyspepsia and hysteria. The purpose of this study was to isolate and identify the chemical constituents of the ethanol extract of leaves of P. sagittalis by checking the pharmacological potential of this extract, in particular on anxiety. The plant was collected in neighborhood Japãozinho, Aracaju - SE. The selected leaves were dried at 40 ° C with circul

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Danielli, Francesca. "Valutazioni comparative delle prestazioni energetiche negli edifici esistenti. Il caso di Concordia Sagittaria." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/20221/.

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L’obiettivo dello studio è principalmente confrontare l’importanza della conformazione architettonica degli edifici residenziali ai fini della valutazione delle prestazioni energetiche. In particolare, si vuole valutare l’incidenza del dettaglio nella modellazione rispetto ai principali indicatori energetici. Inizialmente è stata fatta una ricognizione, nel complesso quadro normativo, sul concetto di efficienza energetica degli edifici, dal livello europeo alla legislazione nazionale e regionale, regione Veneto. È stata analizzata anche la normativa tecnica in materia italiana ed europea. De

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Coelho, Ana Paula Durand. "POTENCIAL GENOTÓXICO E ANTIPROLIFERATIVO DOS EXTRATOS DE Echinodorus grandiflorus E Sagittaria montevidensis (ALISMATACEAE)." Universidade Federal de Santa Maria, 2013. http://repositorio.ufsm.br/handle/1/4859.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>In Brazil, the economic potential of the germplasm of medicinal species is a treasure to be preserved and utilized, increasingly becoming a form of alternative therapy available for the population to use. However, the indiscriminate and uncontrolled use can, cause more harm than benefits to health and it is important to understand these plants, from cellular levels and the action on living organisms. The medicinal species Echinodorus grandiflorus and Sagittaria montevidensis belong to the family Alismataceae, known respectively as

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Polehampton, Edward. "The ISO LWS high resolution spectral survey towards Sagittarius B2." Thesis, University of Oxford, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249161.

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7

Rodrigues, Sheyla Alves. "Toxicidade aguda e efeitos analgésico e depressor do extrato aquoso obtido das folhas de Pluchea sagittalis (Lam.) Cabrera (quitoco)." Universidade Federal de Sergipe, 2007. https://ri.ufs.br/handle/riufs/3844.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The Pluchea sagittalis (Lam) Cabreira, Family Asteraceae, is a plant of the Atlantic Reainforest used in traditional medicine for the treatment of inflammation, as well as of digestive and respiratory diseases. The objective of this dissertation work was to study the possible effects of the aqueous extract of Pluchea sagittalis (Lam) Cabreira, on the Central Nervous System and acute toxicity in mice. This plant is used in traditional medicine for the treatment of inflammation, as well as of digestive and respiratory diseases. The A

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8

Peluso, Sara. "Misurare la massa in buchi neri: il caso di Sagittarius A*." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/24602/.

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Questo documento ha lo scopo di descrivere le principali caratteristiche dei buchi neri, soffermandosi sulle metodologie di misura della massa. In particolare, viene studiato il buco nero al centro della Via Lattea, nella regione nominata Sagittarius A, la cui esistenza è stata verificata in 30 anni di osservazioni e premiata nel 2020 con il premio Nobel per la Fisica. Il primo capitolo è dedicato agli oggetti compatti in generale, per cui si citano nane bianche, stelle di neutroni e buchi neri, quest'ultimi aprono il secondo capitolo che approfondisce il caso particolare del buco nero superm

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9

Martell, Phillip John. "Optical emission line variability in the intermediate polars FO aquarii, V1223 sagittarii and AO piscium /." The Ohio State University, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487683049378577.

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Newby, Matthew T. "The sagittarius tidal stream and the shape of the galactic stellar halo." Thesis, Rensselaer Polytechnic Institute, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3601024.

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<p> The stellar halo that surrounds our Galaxy contains clues to understanding galaxy formation, cosmology, stellar evolution, and the nature of dark matter. Gravitationally disrupted dwarf galaxies form tidal streams, which roughly trace orbits through the Galactic halo. The Sagittarius (Sgr) dwarf tidal debris is the most dominant of these streams, and its properties place important constraints on the distribution of mass (including dark matter) in the Galaxy. Stars not associated with substructures form the "smooth" component of the stellar halo, the origin of which is still under invest

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Stone, Jordan M., D. P. Marrone, C. D. Dowell, B. Schulz, C. O. Heinke, and F. Yusef-Zadeh. "FAR INFRARED VARIABILITY OF SAGITTARIUS A*: 25.5 hr OF MONITORING WITH HERSCHEL." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/621398.

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Variable emission from Sgr A*, the luminous counterpart to the super-massive black hole at the center of our Galaxy, arises from the innermost portions of the accretion flow. Better characterization of the variability is important for constraining models of the low-luminosity accretion mode powering Sgr A*, and could further our ability to use variable emission as a probe of the strong gravitational potential in the vicinity of the 4 x 10(6) M-circle dot black hole. We use the Herschel Spectral and Photometric Imaging Receiver (SPIRE) to monitor Sgr. A* at wavelengths that are difficult or imp

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GIUFFRIDA, GIULIANO. "VIMOS@VLT photometric and spectroscopic survey of the Sagittarius dwarf spheroidal galaxy." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2008. http://hdl.handle.net/2108/487.

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In questi tre anni ho lavorato sulla riduzione di dati fotometrici e spettroscopici della galassia sferoidale nana Sagittario. L'analisi è stata effettuata utilizzando dati nei filtri V e I presi con strumento VIMOS@VLT in modalità Imaging (per la fotometria) e MOS (per la spettroscopia multi oggetto). I dati fotometrici consistono in 8 campi distribuiti lungo l'asse maggiore e minore della galassia più 6 campi centrati su 6 ammassi globulari probabilmente appartenenti alla galassia nana Sagittario (NGC 4147, Pal5, Pal12, Arp2, Ter7, Ter8 ). L'indagine fotometrica mi ha permesso di ottenere

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Minelli, Alice <1994&gt. "Chemical composition of Milky Way satellites: Magellanic Clouds and Sagittarius dwarf galaxy." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amsdottorato.unibo.it/10313/1/PhDThesis_AliceMinelli.pdf.

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This PhD project is aimed at investigating the chemical composition of the stellar populations in the closest satellites of the Milky Way (MW), namely the Large and Small Magellanic Cloud (LMC and SMC, respectively) and the remnant of the Sagittarius (Sgr) dwarf spheroidal galaxy. Their proximity allows us to resolve their individual stars both with spectroscopy and photometry, studying in detail the characteristics of their stellar populations. All these objects are interacting galaxies: LMC and SMC are in an early stage of a minor merger event, and Sgr is being disrupted by the tidal field o

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Harrington, Joseph. "Planetary infrared observations : the occultation of 28 Sagittarii by Saturn and the dynamics of Jupiter's atmosphere." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/57957.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1995.<br>Includes bibliographical references (p. 219-222).<br>by Joseph Harrington.<br>Ph.D.

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Schmiedeke, Anika [Verfasser], Peter [Gutachter] Schilke, and Stefanie [Gutachter] Walch-Gassner. "Radiative transfer modeling of Sagittarius B2 / Anika Schmiedeke ; Gutachter: Peter Schilke, Stefanie Walch-Gassner." Köln : Universitäts- und Stadtbibliothek Köln, 2016. http://d-nb.info/1126094242/34.

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Tothill, Nicholas Francis Hugh. "The structure and evolution of the Lagoon Nebula : star formation in the Sagittarius Arm." Thesis, Queen Mary, University of London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312982.

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Cseresnjes, Patrick. "Etoiles variables et microlentilles gravitationnelles : deux outils d'étude de la galaxie naine du Sagittaire et du Centre Galactique." Paris 6, 2001. http://www.theses.fr/2001PA066411.

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Rossato, Liana Verônica. "Efeitos bioquímicos e fisiológicos do chumbo em plantas de quitoco (Pluchea sagittalis): possível papel fitorremediador." Universidade Federal de Santa Maria, 2010. http://repositorio.ufsm.br/handle/1/11121.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>Lead (Pb) is one of the most abundant, globally distributed toxic elements. Soil, water and air contamination by Pb leads to its accumulation in fish, mammals, and plants, and thus to human intoxication through food. Due to the hazardous effects to the ecosystem, it is necessary that contaminated soils be rehabilitated. Phytoremediation is a cheap technique that can be utilized with this objective. However, it is necessary to know about plant behavior during metal exposure. Therefore, the aim of this study was to characterize phy

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Alfaro, Cuello Mayte [Verfasser], and Nadine [Akademischer Betreuer] Neumayer. "The Nucleus of the Sagittarius Dwarf Spheroidal Galaxy: M54 / Mayte Alfaro Cuello ; Betreuer: Nadine Neumayer." Heidelberg : Universitätsbibliothek Heidelberg, 2019. http://d-nb.info/1196207690/34.

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Fanyi, Meng [Verfasser], Peter [Gutachter] Schilke, and Volker [Gutachter] Ossenkopf-Okada. "Multi-scale observational study of Sagittarius B2 / Meng Fanyi ; Gutachter: Peter Schilke, Volker Ossenkopf-Okada." Köln : Universitäts- und Stadtbibliothek Köln, 2020. http://d-nb.info/1225478529/34.

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Alfaro-Cuello, Mayte [Verfasser], and Nadine [Akademischer Betreuer] Neumayer. "The Nucleus of the Sagittarius Dwarf Spheroidal Galaxy: M54 / Mayte Alfaro Cuello ; Betreuer: Nadine Neumayer." Heidelberg : Universitätsbibliothek Heidelberg, 2019. http://d-nb.info/1196207690/34.

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Gando, Ryunosuke. "X-ray Study on the Activity History of Sagittarius A* by Three-dimensional View of the Galactic Center." 京都大学 (Kyoto University), 2013. http://hdl.handle.net/2433/175114.

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Schwörer, Andreas Stefan [Verfasser], Peter [Gutachter] Schilke, and Stefanie [Gutachter] Walch-Gassner. "Sagittarius B2 North - Birth of a super-stellar cluster? / Andreas Stefan Schwörer ; Gutachter: Peter Schilke, Stefanie Walch-Gassner." Köln : Universitäts- und Stadtbibliothek Köln, 2020. http://d-nb.info/1222160528/34.

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Coker, Robert Francis. "Accretion and gas flows near Sagittarius A*: Toward an understanding of the central parsec of the Milky Way." Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/298743.

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The strong radio emission from Sgr A*, an object located at the dynamical center of the Milky Way, has been attributed to accretion of interstellar gas by a supermassive compact object or dense cluster of objects. We show that any dynamically stable cluster of objects cannot compress the ambient magnetic field or heat the accreting gas sufficiently to reproduce the spectrum of Sgr A*, reaffirming the paradigm that Sgr A* is a single supermassive black hole. We investigate how such a black hole would interact with its surroundings and attempt to determine observational consequences of this inte

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Rocha, Rinaldo José da Silva. "Decomposição de macrófitas aquáticas em dois reservatórios com diferentes estados tróficos." Universidade Federal de São Carlos, 2012. https://repositorio.ufscar.br/handle/ufscar/2078.

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Made available in DSpace on 2016-06-02T19:32:04Z (GMT). No. of bitstreams: 1 4733.pdf: 3640369 bytes, checksum: 241bde399e7bf5d34363759fa6ab1025 (MD5) Previous issue date: 2012-05-23<br>Financiadora de Estudos e Projetos<br>The macrophytes are essential for the development and maintenance of food webs, to carbon dynamics and nutrient cycling in tropical aquatic systems. After senescence and plant death, decomposition of organic detritus depends heavily on their elemental compositions. Thus, the present study aimed to evaluate the effect of seasonality and trophic state of reservoirs and Vi

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Brunes, André Pich. "Manejo de plantas daninhas da cultura do arroz irrigado através de extratos alelopáticos e agentes biológicos." Universidade Federal de Pelotas, 2012. http://repositorio.ufpel.edu.br/handle/ri/1423.

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Made available in DSpace on 2014-08-20T13:44:35Z (GMT). No. of bitstreams: 1 dissertacao_andre_pich_brunes.pdf: 980824 bytes, checksum: 90e2fb8b525b06494bd014358a4889ab (MD5) Previous issue date: 2012-10-15<br>The objective of this study was to evaluate the allelopathic potential of aqueous extract of leaves of different rice cultivars in germination and seed vigor of weeds Digitaria, Aeschynomene and red rice and search the mycoflora of S. montevidensis in order to identify species of pathogenic fungi with the potential to act as bioherbicide and verify their specificity as to plants of i

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Witzel, Gunther [Verfasser], Andreas [Akademischer Betreuer] Eckart, Andreas [Akademischer Betreuer] Zilges, and Peter [Akademischer Betreuer] Schneider. "Intrinsic Near-Infrared Properties of the Variable Source Sagittarius A* / Gunther Witzel. Gutachter: Andreas Eckart ; Andreas Zilges ; Peter Schneider." Köln : Universitäts- und Stadtbibliothek Köln, 2012. http://d-nb.info/1038226619/34.

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Sohn, Sangmo Tony, der Marel Roeland P. van, Nitya Kallivayalil, et al. "HUBBLE SPACE TELESCOPE PROPER MOTIONS OF INDIVIDUAL STARS IN STELLAR STREAMS: ORPHAN, SAGITTARIUS, LETHE, AND THE NEW “PARALLEL STREAM”." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/622680.

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We present a multi-epoch Hubble Space Telescope (HST) study of stellar proper motions (PMs) for four fields along the Orphan Stream. We determine absolute PMs of several individual stars per target field using established techniques that utilize distant background galaxies to define a stationary reference frame. Five Orphan Stream stars are identified in one of the four fields based on combined color-magnitude and PM information. The average PM is consistent with the existing model of the Orphan Stream by Newberg et al. In addition to the Orphan Stream stars, we detect stars that likely belong

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Ravaglia, Giacomo. "Caratterizzazione dinamica passiva di strutture in calcestruzzo armato per la calibrazione di modelli numerici. Il caso studio dell'edificio ATER sito in via Julia 3, Concordia Sagittaria." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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Obiettivo della tesi è quello di giungere ad una caratterizzazione dinamica dell’edificio il più possibile vicina alla realtà. Le vie seguite a tal proposito sono due: da una parte si realizza un modello virtuale dell'edifcio oggetto di studio, dall'altra si rileverà sperimentalmente il comportamento mediante prove non invasive basate su un sensore capace di rilevare le vibrazioni indotte dal microtremore sismico. L'esperienza intrapresa si prefigge di comparare la modellazione agli elementi finiti con la sismologia applicata. In particolare, i parametri modali derivanti dalla misurazione in

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Grandini, Camila Pereira. "Obten??o de extratos vol?teis e n?o vol?teis de Pluchea sagittalis (Lam.) Cabrera (Quitoco) : processos e an?lises." Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2017. http://tede2.pucrs.br/tede2/handle/tede/7473.

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Submitted by Caroline Xavier (caroline.xavier@pucrs.br) on 2017-06-30T17:35:25Z No. of bitstreams: 1 DIS_CAMILA_PEREIRA_GRANDINI_COMPLETO.pdf: 928123 bytes, checksum: 31401f36512c1229c7213472576341c1 (MD5)<br>Made available in DSpace on 2017-06-30T17:35:25Z (GMT). No. of bitstreams: 1 DIS_CAMILA_PEREIRA_GRANDINI_COMPLETO.pdf: 928123 bytes, checksum: 31401f36512c1229c7213472576341c1 (MD5) Previous issue date: 2017-03-28<br>Conselho Nacional de Pesquisa e Desenvolvimento Cient?fico e Tecnol?gico - CNPq<br>The growing concern of industries in finding natural inputs in place of synthetic ones i

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Stüker, Caroline Ziegler. "Estudo dos óleos voláteis de plantas medicinais da família Asteraceae do Rio Grande do Sul: Baccharidastrum triplinervium, Baccharis pentodonta, Pluchea sagittalis e Eupatorium buniifolium." Universidade Federal de Santa Maria, 2007. http://repositorio.ufsm.br/handle/1/10645.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>In this study four species were studied: Baccharidastrum triplinervium, Baccharis pentodonta, Pluchea sagittalis and Eupatorium buniifolium, all species belong to Asteraceae family. The essential oils of these four species of medicinal plants of the Rio Grande Do Sul were obtained by hydrodestillation in a modified Clevenger apparatus and submitted to GC-MS analysis for determination of its chemical compositions. The essential oils had been submitted to in vitro and in vivo tests to determine its antimicrobial, cytotoxic and anti

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Macconi, Duccio. "Processi di scattering in astrofisica." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11466/.

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L'attenzione è stata posta su tre fenomeni fondamentali di scattering: Thomson, Compton e Compton inverso. Sono state sottolineate alcune ed eventuali applicazioni astrofisiche di questi e valutate le implicazioni o generalizzazioni che da tali fenomeni possono derivare: Synchrotron Self-Compton, Comptonizzazione ed effetto Sunyaev-Zeldovich termico. Infine è stato preso un caso astrofisico come applicazione di questi fenomeni: Sagittarius A*, una fonte radio proveniente dal centro della nostra galassia, molto studiata negli anni, citando un articolo pubblicato su una rivista scientifica nel

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Shahzamanian, Sichani Banafsheh [Verfasser], Andreas [Gutachter] Eckart, and Anton [Gutachter] Zensus. "Near-infrared polarimetry in the galactic center. On properties of Sagittarius A* and a dusty S-cluster object / Banafsheh Shahzamanian Sichani ; Gutachter: Andreas Eckart, Anton Zensus." Köln : Universitäts- und Stadtbibliothek Köln, 2016. http://d-nb.info/1119300355/34.

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Borkar, Abhijeet Pramod [Verfasser], Andreas [Akademischer Betreuer] Eckart, Anton [Akademischer Betreuer] Zensus, Yaping [Akademischer Betreuer] Shao, and Behrang [Akademischer Betreuer] Jalali. "Monitoring the Galactic Center at 3mm: Study of Flaring of Sagittarius A* and SiO Masers in the Central Parsec / Abhijeet Pramod Borkar. Gutachter: Andreas Eckart ; Anton Zensus ; Yaping Shao ; Behrang Jalali." Köln : Universitäts- und Stadtbibliothek Köln, 2015. http://nbn-resolving.de/urn:nbn:de:hbz:38-66298.

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Chuard, Dimitri. "Echos X dans la zone moléculaire centrale. Une histoire de l'activité du trou noir galactique au cours du dernier millénaire." Thesis, Sorbonne Paris Cité, 2018. http://www.theses.fr/2018USPCC214.

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Comme la plupart des galaxies massives, la Voie lactée héberge en son centre un trou noir supermassif. Contrairement aux noyaux actifs, celui-ci brille par la faiblesse de sa contrepartie radiative, la source Sgr A?, dont la luminosité est inférieure de près de neuf ordres de grandeur à la luminosité limite d’Eddington. Plusieurs traces indirectes suggèrent cependant que le trou noir galactique a connu des épisodes d’activité plus intense dans le passé. La réflexion des rayons X émis lors des plus récents de ces épisodes est notamment observée aujourd’hui sur les nuages de la zone moléculaire

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Dorken, Marcel Eric. "The evolution and maintenance of monoecy and dioecy in Sagittaria latifolia (Alismataceae)." 2003. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=80254&T=F.

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Higgs, Clare. "Solo dwarf galaxy survey: the Sagittarius dwarf irregular galaxy." Thesis, 2016. http://hdl.handle.net/1828/7120.

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Galaxy evolution depends on a diverse suite of factors, from the environment in which the galaxy exists to the number of supernovae that explode throughout its history. The structure and stellar populations present will also be altered by a galaxy's merger history, stellar mass, star formation rate, among other influences. Some factors, like mergers, are dependent on the environment of the galaxy, while others, like feedback from star formation, are intrinsic to the galaxy themselves. Dwarf galaxies are sensitive to many of these factors due to their smaller masses, hence shallower potential w

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Yakimowski, Sarah. "Gender Strategies and Sex-ratio Evolution in the Clonal Aquatic Plant: Sagittaria latifolia (Alismataceae)." Thesis, 2013. http://hdl.handle.net/1807/35194.

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Flowering plants display diverse reproductive systems, including a variety of gender strategies and mechanisms of clonal propagation. Here, I investigate gender strategies, sex-ratio evolution, and sexual dimorphism in the North American clonal aquatic, Sagittaria latifolia (Alismataceae), which exhibits three sex phenotypes (hermaphrodites, females, males) and two modal sexual systems (monoecy, dioecy). This provides an outstanding opportunity to examine the costs and benefits of combined versus separate sexes. My research focused on the northern range limit in eastern N. America, and on disj

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Kwong, Raelene M., Jean Louis Sagliocco, Nathan E. Harms, Kym L. Butler, Grant D. Martin, and Peter T. Green. "Could enemy release explain invasion success of Sagittaria platyphylla in Australia and South Africa?" 2019. http://hdl.handle.net/10962/76881.

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Sagittaria platyphylla (delta arrowhead) is an emergent aquatic macrophyte native to southeastern United States of America that has been introduced into Australia and South Africa as an ornamental pond and aquarium plant. Compared to plants in the native range, S. platyphylla in the introduced range have greater reproductive capacity and form extensive infestations that dominate shallow waterbodies. One explanation for the invasive success of S. platyphylla in introduced countries is that plants are devoid of biotic pressures that would regulate population abundance in their native range (the

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Kwong, Raelene M., Jean Louis Sagliocco, Nathan E. Harms, Kym L. Butler, Peter T. Green, and Grant D. Martin. "Biogeographical comparison of the emergent macrophyte, Sagittaria platyphylla in its native and introduced ranges." 2017. http://hdl.handle.net/10962/76980.

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Understanding why some plant species become invasive is important to predict and prevent future weed threats and identify appropriate management strategies. Many hypotheses have been proposed to explain why plants become invasive, yet few studies have quantitatively compared plant and population parameters between native and introduced range populations to gain an objective perspective on the causes of plant invasion. The present study uses a biogeographical field survey to compare morphological and reproductive traits and abundance between the native range (USA) and two introduced ranges (Aus

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Dowell, Charles Darren. "Far-infrared polarization by absorption in the molecular cloud sagittarius B2 /." 1997. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:9729820.

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Meyer, Leonhard [Verfasser]. "The near infrared activity of Sagittarius A* / vorgelegt von Leonhard Meyer." 2008. http://d-nb.info/987585924/34.

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Lu, Ru-Sen [Verfasser]. "High frequency VLBI studies of Sagittarius A* and NRAO 530 / vorgelegt von Ru-Sen Lu." 2010. http://d-nb.info/1009958127/34.

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Zamaninasab, Mohammad [Verfasser]. "Near infrared polarimetry : a tool for testing properties of Sagittarius A* / vorgelegt von Mohammad Zamaninasab." 2010. http://d-nb.info/1004908156/34.

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Hilburn, Guy. "Studies of Low Luminosity Active Galactic Nuclei with Monte Carlo and Magnetohydrodynamic Simulations." Thesis, 2012. http://hdl.handle.net/1911/64694.

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Results from several studies are presented which detail explorations of the physical and spectral properties of low luminosity active galactic nuclei. An initial Sagittarius A* general relativistic magnetohydrodynamic simulation and Monte Carlo radiation transport model suggests accretion rate changes as the dominant flaring method. A similar study on M87 introduces new methods to the Monte Carlo model for increased consistency in highly energetic sources. Again, accretion rate variation seems most appropriate to explain spectral transients. To more closely resolve the methods of particle

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Viehmann, Thomas [Verfasser]. "Near- and mid-infrared studies of the galactic center and Sagittarius A* / vorgelegt von Thomas Viehmann." 2007. http://d-nb.info/988266458/34.

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Zhang, Shuo. "Investigating the Physics of Hard X-ray Outbursts from the Galactic Center Supermassive Black Hole Sagittarius A*." Thesis, 2016. https://doi.org/10.7916/D8H1326P.

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The Galactic center supermassive black hole (SMBH) Sagittarius A* (Sgr A*) is the closest such object and thus is an ideal target for investigation of galactic nuclei and their activity cycles. Its remarkable underluminous X-ray state is punctuated by outbursts on different time and energy scales. This thesis presents a study of past, current and possible future X-ray outburst activities from Sgr A*, using the hard X-ray telescope NuSTAR. Indication of substantial past Sgr A* activity, similar to that observed in low-luminosity active Galactic nuclei, has come from the Galactic center molecula

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Kwong, Raelene M., Linda M. Broadhurst, Brian R. Keener, Julie Coetzee, Nunzio Knerr, and Grant D. Martin. "Genetic analysis of native and introduced populations of the aquatic weed Sagittaria platyphylla – implications for biological control in Australia and South Africa." 2017. http://hdl.handle.net/10962/76991.

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Sagittaria platyphylla (Engelm.) J.G. Sm. (Alismataceae) is an emergent aquatic plant native to southern USA. Imported into Australia and South Africa as an ornamental and aquarium plant, the species is now a serious invader of shallow freshwater wetlands, slow-flowing rivers, irrigation channels, drains and along the margins of lakes and reservoirs. As a first step towards initiating a classical biological control program, a population genetic study was conducted to determine the prospects of finding compatible biological control agents and to refine the search for natural enemies to source p

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Chutter, Ashley. "Elemental abundance investigation of two candidate extragalactic globular clusters (NGC 5024, NGC 5466)." Thesis, 2008. http://hdl.handle.net/1828/1355.

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High resolution spectra have been analyzed for two and three stars respectively in the candidate extragalactic globular clusters, NGC 5024 and NGC 5466, with the High-Resolution Spectrograph on the 9.2 m Hobby-Eberly Telescope. The goal of this investigation is to evaluate the proposed extragalactic origins of these two globular clusters. Evidence of a tidal tail in NGC 5466 (Belokurov et al., 2006) and the association of NGC 5024 with the Sagittarius stream (Martinez-Delgado et al., 2004) targeted the clusters as likely remnants of recent accretion events and thus potentially of extragalact

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Masbou, Julien. "Étude de la sensibilité de H.E.S.S. 2 en dessous de 300 GeV et recherche indirecte de matière noire dans les données de H.E.S.S." Phd thesis, 2010. http://tel.archives-ouvertes.fr/tel-00623972.

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Le système de télescopes H.E.S.S. (High Energy Stereoscopic System) est une expérience constituée de quatre imageurs Cherenkov atmosphériques destinés à observer les rayons gamma de plus de 100 GeV et jusqu'à quelques dizaines de TeV. En 2012, une seconde phase de l'expérience consistera en l'ajout d'un cinquième télescope de 28 mètres de diamètre au centre du système existant. Au seuil de déclenchement de 15 GeV, les événements ne seront visibles que par ce grand télescope, une nouvelle méthode de reconstruction est proposée. A l'aide de plusieurs réseaux de neurones, l'énergie de gerbes élec

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