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Dissertations / Theses on the topic 'Viroids'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 July 2025

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1

Bonfiglioli, Roderick. "Studies on the ultrastructural localisation of viroids and other plant pathogens." Title page, contents and summary only, 1997. http://web4.library.adelaide.edu.au/theses/09PH/09phb713.pdf.

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Bibliography: leaves 78-90. Designed to localize viroids at the histological and subcellular level and to determine with which cellular compartments the different viroids are associated. The majority of the work, in both the viroid and the phytoplasma studies involved the development of different methods and techniques.
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2

Taylor, Kathryn, Richard Langham, and Zhongguo Xiong. "Relationship of Viroids to Macrophylla Decline." College of Agriculture, University of Arizona (Tucson, AZ), 1996. http://hdl.handle.net/10150/220553.

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A physiological characterization has established that vascular changes in Macrophylla decline affected trees are not similar in character to xyloporosis affected trees. In addition, a survey of Macrophylla decline affected citrus did not establish any genetic similarity between Macrophylla decline and xyloporosis. We report diagnosis of either CCV or CEV by reverse transcription-polymerase chain reaction (RT-PCR), as well as diagnosis of Macrophylla decline or xyloporosis by Zn-distribution, water conductivity, accumulation of decline- specific proteins and examination of phloem morphology in
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3

Visvader, Jane Ellen. "Structure and function of citrus exocortis viroid /." Title page, contents and summary only, 1985. http://web4.library.adelaide.edu.au/theses/09PH/09phv834.pdf.

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4

Rakowski, Andrew George. "Molecular aspects of viroid activities /." Title page, contents and summary only, 1992. http://web4.library.adelaide.edu.au/theses/09PH/09phr162.pdf.

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5

Warrilow, David. "Studies on the replication complex of citrus exocortis viroid /." Title page, contents and summary only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09phw295.pdf.

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6

Keese, Paul Konrad. "Structures of viroids and virusoids and their functional significance." Title page, contents and summary only, 1986. http://web4.library.adelaide.edu.au/theses/09PH/09phk268.pdf.

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7

Wah, Yan Fong Wan Chow. "Viroids in grapevines : transmission via seeds and persistence in meristem-regenerated vines." Title page, contents and summary only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09phw136.pdf.

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Bibliography: leaves 127-152. The aim of this work is to study viroids in grapevines, particularly their vertical transmission via seeds, during meristem culture and micropropagation. There was also an attempt to produce viroid-free vines by shoot apical meristem culture (SAMC).
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8

Bojic, Teodora. "Host involvement in the replication of potato spindle tuber viroid and the evolutionary relationship between plant viroids and the hepatitis delta virus." Thesis, University of Ottawa (Canada), 2009. http://hdl.handle.net/10393/28353.

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The present study examines the interaction between host RNA polymerase II (RNAP II) and potato spindle tuber viroid (PSTVd), with the goal of locating and characterizing a putative RNAP II promoter within the viroid's RNA genome. By using a co-immunoprecipitation approach coupled with deletion and mutational analysis, RNAP II was shown to specifically bind the left terminal hairpin loop of PSTVd(+) RNA. The interaction with RNAP II appears to be dependent on PSTVd secondary structure features, rather than a particular sequence. These findings provide direct evidence of association between RNAP
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9

Forster, Anthony Carlyle. "Self-cleavage of plant pathogenic RNAs." Title page, contents and summary only, 1987. http://web4.library.adelaide.edu.au/theses/09PH/09phf7331.pdf.

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10

Klümper, Sandra Nicole. "Prozessierung des Kartoffel-Spindelknollensucht-Viroids (PSTVd) Charakterisierung der beteiligten Enzyme der Wirtspflanze /." [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=965233219.

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11

Friday, Dillon R. "Processing of Potato Spindle Tuber Viroids (PSTVd) RNAs in Yeast, a Nonconventional Host." Thesis, University of the Sciences in Philadelphia, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10692985.

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<p> The discovery of viroids in 1971 opened the door to a whole new field of RNA biochemistry. Viroids subsequently became the first of many facets of RNA biochemistry: the first single stranded covalently closed RNA discovered in nature, the first subviral pathogen discovered, and the first pathogen of a eukaryotic system to have its genome sequenced. Viroids are the smallest known agents of infectious disease and they represent the borders of life. They replicate autonomously within their host and since they do not code for their own proteins, they act as scavengers of the host transcription
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12

Freidhoff, Paul. "Using RNA Mimicry of Viroids to Uncover New Noncoding RNA Structural Motifs and Pathways." Thesis, University of the Sciences in Philadelphia, 2020. http://pqdtopen.proquest.com/#viewpdf?dispub=27665966.

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There is broad interest in ncRNAs within technology. The functions of ncRNAs are linked to RNA structural elements, but most of the structure-function relationships of ncRNAs are unknown, which limits the use RNA in technology. Viroids are the first ncRNAs observed. They are unique pathogens because they exclusively hijack ncRNA pathways by mimicking structures found in cellular RNAs. This makes viroids excellent models to study structural-functional relationships of cellular ncRNAs. In this research, we studied a structural element, the sarcin/ricin domain motif, found in PSTVd. This structur
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13

Minoia, Sofia. "Degradación in vivo de un viroide de replicación nuclear: rutas catalizadas por proteínas Argonauta cargadas con pequeños RNAs viroidales y por otras ribonucleasas que generan RNAs subgenómicos." Doctoral thesis, Universitat Politècnica de València, 2015. http://hdl.handle.net/10251/48553.

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Los viroides, los agentes infecciosos más simples de la escala biológica, están constituidos por una molécula circular de RNA monocatenario de aproximadamente 250-400 nucleótios (nt) que no codifica proteína alguna. A pesar de esta simplicidad estructural, los viroides son capaces de replicarse autónomamente, moverse sistémicamente y en muchos casos causar enfermedades en sus plantas huéspedes. Las infecciones producidas por viroides representativos generan la acumulación de pequeños RNAs viroidales (vd-sRNAs) de 21-24 nt con características similares a los pequeños RNA interferentes (si
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14

Kolonko, Nadine. "Isolation und Bestimmung des 5's-Endes der (-)-Strang-Replikationsintermediären des potato spindle tuber viroids (PSTVd)." [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=970020023.

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15

Zhong, Xuehua. "Tertiary structural and functional analyses of RNA motifs that mediate viroid replication and systemic trafficking." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1194540856.

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16

Silva, Simone Rodrigues da [UNESP]. "Caracterização fitossanitária e seleção de limeiras ácidas 'Tahiti' clone Quebra-galho candidatas a matrizes." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/105264.

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Made available in DSpace on 2014-06-11T19:33:40Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-07-04Bitstream added on 2014-06-13T18:45:43Z : No. of bitstreams: 1 silva_sr_dr_jabo.pdf: 2004552 bytes, checksum: 9add4746708701cae05ee9a28f001bfe (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Estacao Experimental de Bebedouro<br>Fundecitrus<br>Objetivando caracterizar sanitariamente a lima ácida ‘Tahiti’ clone Quebra-galho [C. latifolia (Yu. Tanaka) Tanaka] e selecionar plantas candidatas a matrizes, 80 plantas foram avaliadas quanto aos sintomas de trist
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17

Daden, Mounia. "Further Characterization studies on Citrus Tristeza Virus (CTV) isolates collection from Mediterranen countries and their interaction with citrus viroids." Thesis, Universita' degli Studi di Catania, 2011. http://hdl.handle.net/10761/293.

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The biological properties of a collection of citrus tristeza virus (CTV) isolates from 13 Citrus-growing countries were investigated, these lasts were mostly from the Mediterranean area that was thought for long time free from severe CTV isolates. These study confirmed the presence of such isolates in the area, as a lot of biologically indexed isolates were able to produce even stem pitting on Madam vinous Sweet Orange (SwO) considered the most dangerous strain. The symptoms expressed on the standard set of CTV indicator plants; Mexican lime (M.L), Duncan grapefruit (Gft), sour orange (SO) see
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18

Bannach, Oliver. "Viroid-Protein-Komplexe und deren Bedeutung für Replikation und Transport von Viroiden." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=98309277X.

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19

Sikora, Dorota. "Hepatitis Delta Virus: Identification of Host Factors Involved in the Viral Life Cycle, and the Investigation of the Evolutionary Relationship Between HDV and Plant Viroids." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/22910.

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Hepatitis delta virus (HDV) is the smallest known human RNA pathogen. It requires the human hepatitis B virus (HBV) for virion production and transmission, and is hence closely associated with HBV in natural infections. HDV RNA encodes only two viral proteins - the small and the large delta antigens. Due to its limited coding capacity, HDV needs to exploit host factors to ensure its propagation. However, few human proteins are known to interact with the HDV RNA genome. The current study has identified several host proteins interacting with an HDV-derived RNA promoter by multiple approaches:
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20

Murcia, Riaño Nubia. "DETECCIÓN Y CARACTERIZACIÓN AGRONÓMICA DE VIROIDES DE CÍTRICOS. IDENTIFICACIÓN Y CARACTERIZACIÓN MOLECULAR Y BIOLOGÍCA DE VARIANTES DEL VIROIDE DEL ENANISMO DE LOS CÍTRICOS CDVd." Doctoral thesis, Universitat Politècnica de València, 2009. http://hdl.handle.net/10251/6343.

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Los cítricos son huéspedes naturales de diferentes especies de viroides, todos pertenecientes a la familia Pospiviroidae. Estudios preliminares para detectar viroides en especies y variedades comerciales dieron resultados erráticos, excepto cuando se utilizaba la especie indicadora cidro Etrog como huésped bioamplificador. Para evitar el uso de este huésped en los ensayos de detección, se desarrolló un método basado en la hibridación northern. El protocolo desarrollado consistía en: (i) extracción de ácidos nucleicos de muestras de corteza recolectadas en diferentes épocas y/o almacenadas en d
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21

Eiras, Marcelo. "Identificação e caracterização de viróides e estudo de alguns aspectos da interação de viróides com proteínas do hospedeiro." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/11/11135/tde-23042007-161615/.

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O presente trabalho foi subdividido em quatro capítulos com os seguintes objetivos: (i) elaborar uma minuciosa revisão de literatura abordando os principais aspectos da interação viróide-hospedeiro e as relações evolutivas dos viróides e virusóides; (ii) identificar e caracterizar viróides associados a videiras, no Brasil; (iii) purificar, clonar e caracterizar, um RNA circular de seqüência totalmente desconhecida; (iv) estudar alguns aspectos relacionados à interação viróidehospedeiro. Inicialmente, foram identificadas e caracterizadas duas espécies de viróides (o Citrus exocortis viroid CEVd
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22

Silva, Simone Rodrigues da. "Caracterização fitossanitária e seleção de limeiras ácidas 'Tahiti' clone Quebra-galho candidatas a matrizes /." Jaboticabal : [s.n.], 2007. http://hdl.handle.net/11449/105264.

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Resumo: Objetivando caracterizar sanitariamente a lima ácida 'Tahiti' clone Quebra-galho [C. latifolia (Yu. Tanaka) Tanaka] e selecionar plantas candidatas a matrizes, 80 plantas foram avaliadas quanto aos sintomas de tristeza, exocorte, sorose e pelo estado nutricional, desenvolvimento, produção e qualidade de frutos e por testes biológicos para as viroses citadas e xiloporose. Para viróides, empregou-se também RT-PCR. Todos os testes biológicos foram positivos para tristeza e negativos para xiloporose. Para exocorte, 82,5% dos testes foram positivos. No caso da sorose, 11,2% dos testes foram
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23

Sheldon, Candice Claire. "Hammerhead mediated self-cleavage of plant pathogenic RNAs /." Title page, contents and summary only, 1992. http://web4.library.adelaide.edu.au/theses/09PH/09phs544.pdf.

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24

Castellano, Pérez Mayte. "ESTUDIO DE LAS ALTERACIONES EN EL PATRON DE METILACIÓN DEL DNA DEL HUÉSPED INDUCIDAS POR UN VIROIDE NUCLEAR." Doctoral thesis, Universitat Politècnica de València, 2017. http://hdl.handle.net/10251/77992.

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In the first chapter, we determined that cucumber plants infected with hop stunt viroid (HSVd) accumulated high levels of sRNAs derived of ribosomal RNA (rb-sRNAs).Moreover, this effect was correlated with an increase of the transcription of the ribosomal RNAs precursors (rRNAs) due to a decrease in DNA methylation in its promoter region, revealing that certain ribosomal genes (usually silenced) reactivated its transcriptional activity during the infection. In the following chapter and in order to determine whether this process could be a common phenomenon to other plant-pathogen systems, we a
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25

Bussière, Frédéric. "Le viroïde de la mosaïque latente du pêcher (PLMVd), un modèle pour mieux comprendre l'évolution et la biologie des viroïdes du groupe A." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0033/NQ61849.pdf.

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26

Bussière, Frédéric. "Le viroïde de la mosaïque latente du pêcher (PLMVd) un modèle pour mieux comprendre l'évolution et la biologie des viroïdes du groupe A." Thèse, Université de Sherbrooke, 1999. http://savoirs.usherbrooke.ca/handle/11143/4128.

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Les viroïdes sont de courts ARN simple brin circulaires (~300 nucléotides) qui infectent les plantes supérieures causant des pertes économiques importantes en agriculture. Ils se répliquent à l'intérieur des cellules infectées par un mécanisme en cercle roulant (Branch et Robertson, 1984). Leur génome ne code apparemment pour aucune protéine et ils sont ainsi dépendant [i.e. dépendants] de leur hôte pour assurer certaines étapes de leur cycle vital. On connaît aujourd'hui 29 espèces de viroïdes appartenant à deux groupes distincts. Les viroïdes du groupe B possèdent certains éléments de séquen
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27

Schmitz, Axel. "Untersuchungen zum Pathogenitätsmechanismus von Viroid-RNA." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=970018894.

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28

Piernikarczyk, Rajen Julian Joseph [Verfasser], Gerhard [Gutachter] Steger, and Martin [Gutachter] Lercher. "Viroid evolution and viroid-induced pathogenesis networks in host plants / Rajen Julian Joseph Piernikarczyk. Gutachter: Gerhard Steger ; Martin Lercher." Düsseldorf : Universitäts- und Landesbibliothek der Heinrich-Heine-Universität Düsseldorf, 2016. http://d-nb.info/1111038791/34.

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29

Vo, Thi Thu [Verfasser]. "Studies on transmissibility, cytopathology and control of Tomato chlorotic dwarf viroid and Potato spindle tuber viroid / Thi Thu Vo." Bonn : Universitäts- und Landesbibliothek Bonn, 2018. http://d-nb.info/1160673411/34.

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30

Rodriguez, Maria Judith B. "Molecular variation in coconut cadang cadang viroid (CCCVd)." Adelaide, 1993. http://hdl.handle.net/2440/21649.

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31

Takeda, Ryuta. "Investigation of RNA Structural Motifs in a Viroid Required for Its Intercellular Trafficking and Characterization of a Plant RNA Ligase Essential for Viroid Replication." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1297890119.

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32

Serra, Alfonso Pedro. "Estudios de Patogenicidad de Viroides del Género Apscaviroide y Hostuviroide en cítricos." Doctoral thesis, Universitat Politècnica de València, 2009. http://hdl.handle.net/10251/6028.

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Estudios realizados en Atalantia citroides, un género afín de los cítricos, mostraron que estaba infectada con un viroide no descrito hasta el momento. Este nuevo viroide tiene un genoma de 293-294 nucleótidos con una alta proporción de bases GC, una región central conservada que es característica de los miembros del género Apscaviroid, y también la región terminal conservada que tienen este y otros géneros de la familia Pospiviroidae. La estructura secundaria de mínima energía libre predicha para este nuevo viroide es una conformación en forma de varilla con un 68.7% de nucleótidos aparead
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33

Carbonell, Olivares Alberto. "Resistencia a viroides inducida por ribozimas de cabeza de martillo y RNAs interferentes." Doctoral thesis, Universitat Politècnica de València, 2008. http://hdl.handle.net/10251/2005.

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Los viroides, los agentes infecciosos conocidos más simples, están constituidos por una molécula circular de RNA monocatenario. A pesar de su pequeño tamaño (246-401 nt) y de no codificar proteínas, son capaces de replicarse autónomamente, moverse sistémicamente, y causar enfermedades en ciertas plantas. En el presente trabajo hemos profundizado en el estudio de dos metodologías para el control de viroides basadas en ribozimas de cabeza de martillo con motivos de estabilización terciaria, y en RNAs interferentes que inducen en la planta una respuesta defensiva de silenciamiento génico mediado
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34

Giguère, Tamara. "Détermination de la structure de tous les viroïdes." Thèse, Université de Sherbrooke, 2017. http://hdl.handle.net/11143/11271.

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Les viroïdes sont des agents pathogènes subviraux qui infectent des plantes importantes en agriculture. Jusqu’à aujourd’hui, une trentaine d’espèces ont été découvertes. Celles-ci sont composées d’un brin d’ARN circulaire de longueur variant selon l'espèce de 245 à 400 nucléotides qui ne codent pour aucune protéine. Chaque viroïde dépend de sa structure pour interagir avec son hôte et effectuer toutes les étapes de son cycle biologique. Il est donc de la plus haute importance de bien la connaître. À ce jour, la plupart des études présentent la structure des viroïdes par une prédiction bio-
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35

Bani, Hashemian Seyed Mehdi. "RESPUESTA DE DISTINTOS GENOTIPOS DE CÍTRICOS Y GÉNEROS AFINES A LA INFECCIÓN CON VIROIDES." Doctoral thesis, Universitat Politècnica de València, 2009. http://hdl.handle.net/10251/6283.

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Los especies de cítricos y géneros afines pertenecen a la familia Rutaceae. Los cítricos son huéspedes naturales de siete viroides, pero solamente Citrus exocortis viroid (CEVd) y variantes específicas de Hop stunt viroid (HSVd) causan patologías (exocortis y cachexia, respectivamente) en especies sensibles. La mayoría de los cítricos son tolerantes a las infecciones viroidales salvo algunas especies que son sensibles y manifiestan síntomas. En variedades comerciales infectadas, es frecuente encontrar los viroides como infecciones múltiples. El objetivo de este trabajo es estudiar la respuesta
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36

Nohales, Zafra Maria Angeles. "Caracterización de actividades RNA ligasa implicadas en la replicación de los viroides nucleares y cloroplásticos." Doctoral thesis, Universitat Politècnica de València, 2011. http://hdl.handle.net/10251/12266.

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Los viroides son pequeños RNAs circulares de cadena sencilla (246-401 nt) patógenos de plantas. A pesar de su pequeño tamaño y de no codificar proteínas, son capaces de replicarse autónomamente, moverse sistémicamente y, en la mayoría de los casos, provocar enfermedades en sus plantas huésped. La replicación de los viroides ocurre a través de un mecanismo de círculo rodante con intermediarios de RNA que consta de tres etapas: (1) transcripción RNA-RNA que origina RNAs oligoméricos de polaridad complementaria, (2) procesamiento de algunos de estos oligómeros a monómeros lineales, y (3) circular
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37

Aschermann, Monika Katja. "Identifikation eines zellulären RNA-Wechselwirkungspartners von PSTVd in vitro und in vivo." [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=962880507.

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38

Ibiza, Gimeno Vicente Pascual. "Nuevas herramientas en la lucha contra las virosis del pimiento." Doctoral thesis, Universitat Politècnica de València, 2011. http://hdl.handle.net/10251/11549.

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Las enfermedades de etiología viral destacan por ser el principal factor limitante de las hortalizas. La estrategia más eficaz para el control consiste en la identificación de genes de resistencia y el posterior desarrollo de variedades resistentes. El principal objetivo de esta tesis se centra en el aprovechamiento y la caracterización de la variabilidad genética de las especies cultivadas del género Capsicum (C. annuum, C. chinense, C. frutescens, C. baccatum y C. pubescens). Se ha puesto a punto una plataforma de EcoTILLING que permite un cribado eficiente de la colección de entradas de C
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Martínez, Arias Germán Eugenio. "Relación entre el silenciamiento de RNA y la patogénesis inducida por un viroide con replicación nuclear." Doctoral thesis, Universitat Politècnica de València, 2011. http://hdl.handle.net/10251/11302.

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Interés del estudio: Los viroides son patógenos exclusivos de plantas que infectan un gran número de especies de interés agronómico. Sin capacidad descrita para codificar proteínas, todas las fases de su ciclo vital son estrictamente dependientes de su interacción con factores del huésped. Históricamente se ha asumido que la patogénesis es consecuencia de la competencia huésped-patógeno por factores celulares implicados en el ciclo vital del viroide. En los últimos años se ha propuesto que la respuesta de silenciamiento de RNA (RNAi) del huésped frente a estos patógenos es la responsable de l
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40

Trubl, Gareth. "Pioneering Soil Viromics to Elucidate Viral Impacts on Soil Ecosystem Services." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1543425468999981.

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41

Parmigiani, Silvana Varella. "Acuracia da sorologia em comparação a reação em cadeia da polimerase (PCR) no diagnostico de infecção materna pelo citomegalovirus." [s.n.], 1999. http://repositorio.unicamp.br/jspui/handle/REPOSIP/313157.

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Orientadores: Ricardo Barini, Sandra Cecilia Botelho Costa<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas<br>Made available in DSpace on 2018-07-25T18:04:20Z (GMT). No. of bitstreams: 1 Parmigiani_SilvanaVarella_M.pdf: 308511 bytes, checksum: 0691ef142f1792c20a5fa768a342e994 (MD5) Previous issue date: 1999<br>Resumo: O objetivo deste trabalho foi estudar a acurácia do teste sorológico ELISA (Enzyme linked immunosorbent assay) no diagnóstico de infecção materna pelo citomegalovírus (CMV) em comparação à reação em cadeia da polimerase (PCR). Foi re
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42

Côté, Fabien. "Caractérisation des mécanismes de réplication et de pathogenèse du viroïde de la mosaïque latente du pêcher (PLMVd)." Sherbrooke : Université de Sherbrooke, 2000.

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43

Roux, Simon, Natalie E. Solonenko, Vinh T. Dang, et al. "Towards quantitative viromics for both double-stranded and single-stranded DNA viruses." PEERJ INC, 2016. http://hdl.handle.net/10150/622482.

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Background. Viruses strongly influence microbial population dynamics and ecosystem functions However, our ability to quantitatively evaluate those viral impads is limited to the few cultivated viruses and double-stranded DNA (dsDNA) viral genomes captured in quantitative viral metagenornes (vromes). This leaves the ecology of nondsDNA viruses nearly unlmovvn, including single-stranded DNA (ssDNA) viruses that have been frequently observed in viromes, but not quantified due to amplification biases in sequencing library preparations (Multiple Displacement Amplification, Linker Amplification or T
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Moreira, Alécio Souza. "Epidemiologia comparativa de três viroses em abobrinha de moita (Cucurbita pepo L.)." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/11/11135/tde-08022011-092407/.

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A abobrinha de moita (Cucurbita pepo L.), espécie pertencente à família Cucurbitaceae, apresenta significativa participação na produção mundial e brasileira desta família de plantas. Porém, como em toda cultura de importância econômica, as cucurbitáceas apresentam problemas fitossanitários causados por diferentes agentes etiológicos. Na produção brasileira de abóboras, já foi constatada a presença de 8 vírus, dentre eles os potyvirus PRSV-W (Papaya ringspot virus-type W) e ZYMV (Zucchini yellow mosaic virus) e o tospovirus ZLCV (Zucchini lethal chlorosis virus) têm sido considerados os mais im
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Valero, José R. "Perturbations métaboliques chez trois insectes au cours de bacilloses, viroses ou microsporidioses." Master's thesis, Université Laval, 1985. http://hdl.handle.net/20.500.11794/33620.

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Une exploration métabolique détaillée a été entreprise chez trois insectes sains ou subissant divers types de maladies soit des infections par Bacillus thuringiensis 3a3b, par polyédrie nucléaire (Baculovirus) ou par microsporidies (Protozoaires). Les Invertébrés expérimentés étaient trois insectes forestiers dévastateurs soit la tordeuse des bourgeons de l’épinette, Choristoneura fumiferana C. (Lepidoptera : Tortricidae), la Livrée des forêts, Malacosoma disstria H. (Lepidoptera : Lasiocampidae) et le Diprion de swaine, Neodiprion swainei M. (Hymenoptera : Diprionidae). Cette étude avait pour
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46

Gas, López Mª Eugenia. "Replicación de los viroides nucleares: motivos estructurales y enzimas implicados en el procesamiento in vivo de sus intermediarios oligoméricos." Doctoral thesis, Universitat de València, 2007. http://hdl.handle.net/10803/9935.

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Los viroides, los agentes infecciosos más pequeños descritos hasta la fecha (246-401 nt), están constituidos únicamente por una molécula circular de RNA de simple cadena. A pesar de su tamaño y de no codificar proteínas son capaces de replicarse autónomamente, moverse sistémicamente, y causar enfermedades en plantas susceptibles gracias a su capacidad para interaccionar con factores del huésped. Dichas propiedades biológicas y moleculares hacen de estos patógenos un excelente modelo para abordar el estudio de cuestiones básicas sobre la relación entre la estructura del RNA y su función.La repl
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Müller, Merold. "Isolierung und Charakterisierung von Ribonukleasen aus der Kartoffel (Solanum tuberosum) und Studien zu ihrer möglichen Beteiligung an der Viroid-Replikation /." [S.l. : s.n.], 1999. http://www.gbv.de/dms/bs/toc/31169067X.pdf.

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Santos, Ana Claudia Ferrari dos [UNESP]. "Viroses respiratórias em receptores de transplante de células tronco hemapoéticas e pacientes oncohematológicos." Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/88101.

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Made available in DSpace on 2014-06-11T19:23:07Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-12-18Bitstream added on 2014-06-13T20:29:58Z : No. of bitstreams: 1 santos_acf_me_botfm.pdf: 829509 bytes, checksum: 0cd3f86573fc925e2c990afa613fa520 (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>Fundação Amaral Carvalho<br>As infecções ocasionadas por vírus respiratórios (VR) causam significante morbidade e mortalidade em pacientes imunocomprometidos, especialmente em receptores de transplante de células tronco hematopoéticas (TCTH). Durante o período de abril a
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Couto, Carla Renata. "Viroses respitarórias após vacinação contra influenza em profissionais de saúde (Projeto Tira-teima)." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/5/5134/tde-27052010-161855/.

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INTRODUÇÃO: A adesão à vacinação contra influenza é historicamente baixa entre profissionais da área da saúde (PAS) (2 a 36%). A ocorrência de sintomas respiratórios após vacinação é freqüentemente interpretada como falha vacinal. No Hospital das Clínicas da FMUSP, um estudo preliminar mostrou que as principais razões para não adesão são a percepção da ineficácia da vacina e o medo de reações adversas. OBJETIVOS: Identificar a incidência de eventos adversos pós-vacinação e identificar os vírus respiratórios (VR) responsáveis por eventuais episódios de infecção de via aérea superior (IVAS) que
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Martínez, Puchol Sandra. "Seqüenciació massiva aplicada a l'epidemiologia d'aigües residuals i a la caracterització de viromes." Doctoral thesis, Universitat de Barcelona, 2021. http://hdl.handle.net/10803/672941.

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L’objectiu principal de la present tesi doctoral ha estat l’optimització i aplicació de procediments basats en la seqüenciació massiva per a la descripció del viroma associat a l’aigua residual i a altres mostres d’interès epidemiològic. Els objectius específics han estat: 1. Optimitzar i aplicar diferents tècniques de seqüenciació massiva per a l’anàlisi de mostres ambientals i biològiques. 2. Caracteritzar el viroma de l’aigua residual amb focus en els patògens humans. 3. Avaluar l’ús del la seqüenciació massiva, amb i sense enriquiment de dianes, i de
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