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Dissertations / Theses on the topic 'Pteridium'

Author: Grafiati

Published: 4 June 2021

Last updated: 18 February 2022

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1

Attree, S. M. "Properties of Pteridium protoplasts." Thesis, University of Manchester, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378009.

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2

Jatoba, Luciana de Jesus. "Alelopatia em Pteridium arachnoideum (Kaulf.) Maxon. (Dennstaedtiaceae)." Universidade Federal de São Carlos, 2016. https://repositorio.ufscar.br/handle/ufscar/7979.

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3

Hadfield, Patrick R. H. "Cyanogenesis in bracken (Pteridium aquilinum (L.) Kuhn)." Thesis, University of Edinburgh, 1986. http://hdl.handle.net/1842/13972.

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4

Oliveira, Rui Miguel Gil da Costa. "Studies on the biopathological actions of Pteridium aquilinum." Tese, Instituto de Ciências Biomédicas Abel Salazar, 2011. http://hdl.handle.net/10216/63596.

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5

Oliveira, Rui Miguel Gil da Costa. "Studies on the biopathological actions of Pteridium aquilinum." Doctoral thesis, Instituto de Ciências Biomédicas Abel Salazar, 2011. http://hdl.handle.net/10216/63596.

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6

Mohammad, Rizgar Hassan. "Pterosins and pterosides in bracken (Pteridium aquilinum (L.) Kuhn)." Thesis, Bangor University, 2016. https://research.bangor.ac.uk/portal/en/theses/pterosins-and-pterosides-in-bracken-pteridium-aquilinum-l-kuhn(b7ccd2e5-8120-49e9-b825-15e071d1da75).html.

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An intensive study was undertaken in order to isolate and identify bioactive compounds in bracken, Pteridium aquilinum (L.) Kuhn (Dennstaedtiaceae). A systematic phytochemical investigations of the underground rhizomes of this plant afforded thirty-five pterosins and pterosides along with the main carcinogen in bracken, ptaquiloside, 5-hydroxyisocalamene and 5-(β-hydroxy)ethyl-2, 2, 4, 6-tetramethyl-1, 3-indandione. By detailed analysis of one- and two-dimensional nuclear magnetic resonance spectroscopy, circular dichroism and highresolution mass spectrometric data, thirteen previously undescr

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7

Neto, Cunha Gomes Joana. "Biological effects of Pteridium aquilinum and its toxin in gastric carcinogenesis : relationship with Helicobacter pylori infection." Thesis, Paris 11, 2012. http://www.theses.fr/2012PA114822.

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La cancérogenèse gastrique est un processus d’origine multifactorielle, incluant des facteurs génétiques de l’hôte, mais aussi d’origine bactérienne et de l’environnent. Les populations humaines peuvent être exposées directement ou indirectement à des composés toxiques/génotoxiques présents dans les plantes, comme la fougère Pteridium aquilinum. Cette plante comprend une toxine, le ptaquiloside associée à des maladies graves et le développement de cancer chez les animaux. Des études épidémiologiques ont démontré une association entre l'exposition à ces fougères et l’incidence du cancer gastriq

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8

Latorre, Andréia Oliveira. "Avaliação dos efeitos imunotóxicos da Pteridium aquilinum. Estudo em camundongos." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/10/10133/tde-02032007-123407/.

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Pteridium aquilinum, conhecida popularmente como "samambaia-do-campo" ou simplesmente "samambaia", é considerada uma das plantas tóxicas mais importantes no mundo, não só pela sua distribuição cosmopolita e intoxicação de rebanhos em diversas partes do mundo, mas também pelo seu alto potencial carcinogênico observado em animais e seres humanos que se alimentam com esta planta. Por outro lado, não havia dados na literatura a respeito dos possíveis efeitos tóxicos desta planta sobre o sistema imune, o qual se sabe, tem papel fundamental não só para o controle de doenças infec

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9

Ogunbiyi, Adetokunbo Olawale. "Aspects of the toxicology of the bracken fern (Pteridium aquilinum)." Thesis, University of Surrey, 1987. http://epubs.surrey.ac.uk/844019/.

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Aspects of the toxicology of bracken (Pteridium aguilinum) were studied in sub-acute and chronic studies using male Wistar-albino rats. In a chronic study, bracken induced ileal adenomas in an 8.5 month period but after 24 months, no tumours were seen in both the quercetin- and shikimate-fed rats. Tissue ornithine decarboxylase (ODC) levels were enhanced over a 90-day test period when shikimate was fed alone or in conjunction with BBN and MNNG as initiators and with cyclophosphamide, saccharin and lithocholate as promoters, suggesting that shikimate might be a tumour promoter. Quercetin, was a

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10

Anjos, Bruno Leite dos. "Intoxicação aguda espontânea e experimental por samambaia (Pteridium aquilinum) em bovinos." Universidade Federal de Santa Maria, 2009. http://repositorio.ufsm.br/handle/1/10032.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>The epidemiology, pathogenesis, clinical and pathological aspects of the spontaneous and experimental poisoning of cattle by bracken fern (Pteridium aquilinum) were studied. Two scientific papers that stemmed from these studies are presented and discussed here. Initially, 6,256 necropsy reports from cattle necropsied during a de 43-year-period (1964-2006) were reviewed. Of those, 15 cases were consistent with acute poisoning caused by the ingestion of P. aquilinum and they occurred in cattle from small farms in the Central region

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11

McElwee, M. J. "Studies on the development of fungal pathogens (Ascochyta pteridis and Phoma aquilina) as agents of biological control of bracken (Pteridium aquilinum (L) Kuhn)." Thesis, University of Strathclyde, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382396.

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12

Ader, Katherine Gwyneth. "Factors controlling the distribution and spread of bracken (Pteridium Aquilinum) in Scotland." Thesis, University of Glasgow, 1988. http://theses.gla.ac.uk/1564/.

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The aim of this thesis is to investigate the factors controlling the spread and distribution of bracken (Pteridium aquilinum) in Scotland. Bracken has long been an agricultural problem and, more recently, fears have been raised about the plant's carcinogenic properties. Despite the seriousness of the problem, there has been little quantitative research into factors controlling the plant's vigour, although there are many anecdotal references on the subject. It is the aim of this thesis to; study the climatic, edaphic and biotic characteristics of the bracken zone; establish the statistical rela

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13

Paterson, Stephen. "Control and modelling of bracken (Pteridium Aquilinum (L.) Kuhn) in Great Britain." Thesis, University of Liverpool, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318285.

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14

Marty, Dominique, and Nicole Videau. "Les Landes à fougères aigle ( Pteridium aquiliunum ) des Pyrénées françaises : étude phytogéographique." Toulouse 2, 1987. http://www.theses.fr/1987TOU20011.

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Les landes a fougere presentent une extension geographique et une unite physionomique sur l'ensemble de la zone de moyenne montagne des pyrenees francaises. A partir de ce constat, une synthese agro-ecologique a ete menee dans quatre secteurs de reference (pays basque, bigorre, ariege, vallespir). La definition d'un systeme utilisee comme modele d'investigation est fondee sur une double base : une approche systemique de l'objet d'etude et une approche diagonale de l'espace. La gestion de l'ensemble agro-pastoral des landes a fougere est regie par les brulis qui en est le processus regulateur.

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15

Der, Joshua, Michael Barker, Norman Wickett, Claude dePamphilis, and Paul Wolf. "De novo characterization of the gametophyte transcriptome in bracken fern, Pteridium aquilinum." BioMed Central, 2011. http://hdl.handle.net/10150/610016.

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BACKGROUND:Because of their phylogenetic position and unique characteristics of their biology and life cycle, ferns represent an important lineage for studying the evolution of land plants. Large and complex genomes in ferns combined with the absence of economically important species have been a barrier to the development of genomic resources. However, high throughput sequencing technologies are now being widely applied to non-model species. We leveraged the Roche 454 GS-FLX Titanium pyrosequencing platform in sequencing the gametophyte transcriptome of bracken fern (Pteridium aquilinum) to de

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16

Donnelly, Eric. "Potential uses of bracken (Pteridium aquilinum (L.) Kuhn) in organic agriculture in Scotland." Thesis, University of Aberdeen, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274892.

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To assess the availability of bracken and the factors influencing frond yields, this thesis investigated the growth and phenology of bracken populations across Scotland in relation to site characteristics. The change in elements in fronds and litter from April to November was analysed, along with the concentrations of the carcinogen Ptaquiloside (Pta). Frond dry matter yields increased to maximum in August/September, falling to those in November. In September/October, frond yields ranged from 4.70-15.9 DM t ha<sup>-1</sup>. Frond concentrations of phosphorus and potassium reduced, and conc

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17

Marty, Dominique Videau Nicole. "Les Landes à fougère aigle (Pteridium aquilinum) des Pyrénées françaises une étude phytogéographique /." Lille 3 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb376077589.

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18

Boabaid, Fabiana M. "Achados clínico-patológicos e métodos de controle da intoxicação por Pteridium (aquilinum) arachnoideum." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/171444.

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A infestação de pastagens por populações de Pteridium arachnoideum é um problema que afeta a pecuária, em diversas partes do mundo. Os efeitos deletérios da infestação pela planta sobre a bovinocultura são manifestados na forma de mortalidades e de redução das áreas de pastagens, assim como de perdas produtivas. Devido à importância dessas perdas na produção de bovinos, foi proposto o acompanhamento de uma propriedade do Rio Grande do Sul com problemas decorrentes da infestação pela planta em sua casuística e métodos de controle empregados. Adicionalmente, realizou-se teste da viabilidade de o

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19

Rashbrook, Vanessa Karin. "Interactions between ants, herbivorous insects and bracken (Pteridium aquilinum), a fern with extrafloral nectaries." Thesis, Rhodes University, 1989. http://hdl.handle.net/10962/d1002042.

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Bracken (Pteridium aquilinum) is a cosmopolitan species of fern which possesses extrafloral nectaries. A survey of the arthropod fauna associated with the plant throughout its range in South Africa identified the most widespread and damaging bracken herbivores and those species most likely to be influenced by ants visiting the extrafloral nectaries. Seventeen herbivorous arthropods were found to be definitely feeding on bracken and a further thirteen species with a less certain status were recorded. In addition, several species of ants were observed on the fronds and feeding at the extrafloral

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20

LANNA, NETA A. T. "Selênio como suplemento para bovinos intoxicados cronicamente por Pteridium sp. no Espirito Santo. 2017." Universidade Federal do Espírito Santo, 2018. http://repositorio.ufes.br/handle/10/7808.

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Made available in DSpace on 2018-08-01T22:57:00Z (GMT). No. of bitstreams: 1 tese_9923_ALDA TRIVELLATO LANNA NETA.pdf: 696628 bytes, checksum: ed0894194de5775ad2668613855581e6 (MD5) Previous issue date: 2018-01-09<br>Pteridiumsp.(samambaia) é uma planta responsável por diversos quadros de intoxicação em animais e seres humanos. Em bovinos, um dos quadros comuns na região sul do Espírito Santo é a hematúria enzoótica bovina (HEB) que não possui tratamento. Assim, o objetivo do presente trabalho foi determinar os efeitos do selênio associado a vitamina E como suplemento em

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21

Zhao, Jiewen. "The extraction of high value chemicals from heather (Calluna vulgaris) and bracken (Pteridium aquilinum)." Thesis, University of York, 2011. http://etheses.whiterose.ac.uk/2019/.

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The aim of the project is to extract and identify high value chemicals with potential applications as pharmaceutical drugs or precursors from heather (Calluna vulgaris) and bracken (Pteridium aquilinum). Supercritical carbon dioxide extracts of heather were analysed for their triterpenoid content. Several triterpenoids were identified in heather supercritical carbon dioxide extracts and many of them were already reported to have potential valuable biological activities. Seasonal variation of total triterpenoid content in heather was also evaluated. The result indicated that summer flowering he

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22

Masuda, Eduardo Kenji. "Patogênese dos carcinomas de células escamosas alimentares associados ao consumo de Pteridium aquilinum em bovinos." Universidade Federal de Santa Maria, 2010. http://repositorio.ufsm.br/handle/1/4051.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>It is believed that papilloma formation is critical to pathogenesis of the upper digestive tract (UDT) squamous cell carcinomas (SCCs) in cattle, the so called papilloma-carcinoma syndrome. Due to the maintenance of papillomas for long periods of time in the UDT, due to immunosuppressive agents in bracken fern (Pteridium aquilinum), the keratinocytes of papilloma become target for carcinogens to promote carcinomatous transformation. Many evidences of the papilloma-carcinoma syndrome were observed in vitro. However, they have not be

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23

Santos, Bruno Jos? Martini. "Aspectos Cl?nicos e Patol?gicos da Intoxica??o Experimental por Pteridium arachnoideum (Dennstatiaceae) em Equinos. 2010." Universidade Federal Rural do Rio de Janeiro, 2010. https://tede.ufrrj.br/jspui/handle/tede/881.

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Made available in DSpace on 2016-04-28T20:18:26Z (GMT). No. of bitstreams: 1 Bruno Jose Martini Santos1.pdf: 1883262 bytes, checksum: 395f219cf3935956cd50161c96cd1a19 (MD5) Previous issue date: 2010-02-10<br>The administration of the aerial parts of Pteridium arachnoideum during 15 to 57 days in proportions that varied from 50 to 75% of the supplied grass (Pennicetum purpureum) mixed with hay of bracken fern, caused in 3 of the 4 experimental horses, a clinical and pathological picture that can be attributed to the thiaminases, one of the poisonous principles of the plant. The clinical pic

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24

Gabriel, Adriane Loy. "Aspectos epidemiológicos, clínicos e lesões vesicais na intoxicação crônica espontânea por Pteridium aquilinum em bovinos." Universidade Federal de Santa Maria, 2008. http://repositorio.ufsm.br/handle/1/10028.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>Spontaneous cases of chronic poisoning by Pteridium aquilinum in cattle were studied. The clinical forms of the disease were squamous cell carcinoma (SCCs) of the upper digestive tract (UDT) and bovine enzootic hematuria (BEH). The cases were from the midland Region of the Midwest of Rio Grande do Sul State, Brazil. For the epidemiological study, the profile of the farms was analyzed about herd purpose, main activity of the farm, altitude, and area of plant infestation. No differences were observed among the clinical forms, accor

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Souto, Marione de Albuquerque Moreira. "NEOPLASIAS DO TRATO ALIMENTAR SUPERIOR EM BOVINOS ASSOCIADAS AO CONSUMO ESPONTÂNEO DE SAMAMBAIA (Pteridium aquilinum)." Universidade Federal de Santa Maria, 2005. http://repositorio.ufsm.br/handle/1/10056.

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Thirty bovine with neoplasms of the upper digestive tract (UDT) associated to the spontaneous consumption of bracken fern (Pteridium aquilinum) were studied. They were from 27 farms, localized in the municipalities of Jaguari (23) and Nova Esperança do Sul (4), Rio Grande do Sul, Brazil. The total bovine population in those farms was 1,090 and large amounts of bracken fern were found in the pastures. Twenty-six were cows e four were castrated males. The age ranged from 3 to 13-years-old. Most of them were 7 to 8-years-old (46,6%). Clinical signs observed in the affected animals were progressiv

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Costa, Danilo C?sar de Abreu. "Avalia??o de controle de Pteridium aquilinum (l.) Kuhn. na RPPN Fartura em Capelinha, MG." UFVJM, 2016. http://acervo.ufvjm.edu.br/jspui/handle/1/1090.

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Folha de aprova??o ausente no trabalho.<br>Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2016-12-15T16:26:43Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) danilo_cesar_de_abreu_costa.pdf: 2169605 bytes, checksum: 5ec8ad603683a6fdfbcbbb5e0eb92f2a (MD5)<br>Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2016-12-19T13:54:21Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) danilo_cesar_de_abreu_costa.pdf: 2169605 bytes, checksum: 5ec8ad6036

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Freitas, Renata Nascimento de. "Estudos moleculares de tecidos normais e tumores malignos de roedores tratados com samambaia (Pteridium aquilinum)." Universidade Federal de Minas Gerais, 2001. http://hdl.handle.net/1843/UCSD-8HEPNW.

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Bracken fern (Pteridium aquilinum) toxicity and carcinogenicity properties have been extensively described in domestic and experimental animals. Some epidemiologic studies have associated the human exposition to the bracken fern and /or to its toxins with a higher risk for the occurrence of esophagus cancer in Venezuela and stomach cancer in Japan, Brazil, Costa Rica, United Kingdom ad Venezuela. However, these epidemiologic studies are not enough to unequivocally establish a causal relationship between bracken fern and cancer development in human beings. In the present work we proposed to inv

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Hinshalwood, A. M. "Factors influencing the absorption, translocation and biochemical action of asulam in bracken (Pteridium aquilinum (L.) Kuhn)." Thesis, University of Strathclyde, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372086.

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Oliveira, Lu?s Gustavo Picorelli de. "Novos Aspectos Patol?gicos e Patogen?ticos da Hemat?ria Enzo?tica Bovina." Universidade Federal Rural do Rio de Janeiro, 2009. https://tede.ufrrj.br/jspui/handle/tede/921.

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Made available in DSpace on 2016-04-28T20:18:35Z (GMT). No. of bitstreams: 1 LUIS GUSTAVO PICORELLI DE OLIVEIRA 1-75.pdf: 8291753 bytes, checksum: d0e3e8919d70356d42c7098b6af1d1a4 (MD5) Previous issue date: 2009-01-28<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>Ninety bovine bladders, from a slaughterhouse from the district of Barra Mansa/RJ and from bovine necropsies in Pteridium arachnoideum invaded locations, were examined when associated with clinical signs as those found in bovine enzootic hematuria. A diffuse wrinkling of the bladder mucosa was found in 40% of t

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30

Sheaves, Barbara Joan. "An investigation of certain human health problems associated with bracken fern (Pteridium aquilinum) environments in the U.K." Thesis, University of Plymouth, 1995. http://hdl.handle.net/10026.1/2228.

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Bracken environments harbour the sheep tick (Ixodes ricinus), known vector of a number of diseases. Initial investigation indicated the presence of sheep ticks infected with the Lyme disease spirochaete Borrelia burgdorferi on open moorland areas of the North York Moors and the moorland areas of the South West of the U.K. Some aspects of the problem of Lyme disease on U.K. moorlands were explored in this study. A survey through the summer of 1993 of people using the North York Moors, Dartmoor and the Quantock Hills in Somerset for both work and leisure activities revealed a very high proportio

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Whitehead, Sharon J. "The morphology and physiology of moorland bracken (Pteridium aquilinum (L.) Kuhn) and their implications for its control." Thesis, University of York, 1993. http://etheses.whiterose.ac.uk/2506/.

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Jubrael, J. M. S. "Preparation of a partial gene library, detection of DNA polymorphisms and chromosome studies in the fern Pteridium." Thesis, University of Manchester, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377748.

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Masuda, Eduardo Kenji. "Morfologia e imunoistoquímica dos carcinomas de células escamosas alimentares associados ao consumo de Pteridium aquilinum em bovinos." Universidade Federal de Santa Maria, 2007. http://repositorio.ufsm.br/handle/1/10024.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>To determine the main factors influencing the biological behavior of 40 squamous cell carcinomas (SCC) of the upper digestive tract (UDT) of cattle associated with spontaneous ingestion of bracken fern (Pteridium aquilinum), morphological, including cell proliferation, and immunohistochemical aspects were studied. The aspects analyzed included anatomical localization of SCCs, degree of differentiation, occurrence and distribution of metastasis, intensity of the lymphoplasmocytic inflammatory infiltrate (LPII), of the desmoplastic r

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34

Toropov, Pavel. "Potential toxic effects of Bracken (Pteridium aquilinum (L) Kuhn) on invertebrates and diatoms in Welsh upland streams." Thesis, University of Liverpool, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250370.

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This thesis examines a wide range of domestic novels, from Bram Stoker's Dracula (1897) to Woolf's Mrs Dallowa~ (1925), in order to explore their intensified concern with the aesthetlc value of domestic scene. The representation of the house in these works is viewed as an ideological strategy of containment, effected not only by narrative exclusions but also by the literary mode of the narrative. The domestic novel at the turn of the century does not necessarily produce an image of the house but presents a writing of space which interacts with architectural aesthetics in a discourse of the hou

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Latorre, Andréia Oliveira. "Efeitos imunotóxicos da Pteridium aquilinum em células natural killer de camundongos e a reversão destes efeitos com selênio." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/10/10133/tde-18012011-133236/.

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Os resultados obtidos no mestrado mostraram que a samambaia do campo (Pteridium aquilinum) reduz a citotoxicidade das células natural killer (NK) esplênicas e a resposta imune celular do tipo tardia (DTH) de camundongos. Entretanto, até aquele momento não era sabido qual a célula afetada pela planta causava a diminuição da DTH. Assim, o objetivo inicial deste estudo foi verificar qual a célula envolvida na diminuição da DTH. Além disto, buscou-se descobrir o mecanismo de ação imunotóxico da P. aquilinum, o principio tóxico envolvido e se este efeito poderia ser revertido pelo selênio (Se). Par

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Der, Joshua P. "Genomic Perspectives on Evolution in Bracken Fern." DigitalCommons@USU, 2010. https://digitalcommons.usu.edu/etd/663.

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The fern genus Pteridium comprises a number of closely related species distributed throughout the world. Collectively they are called bracken ferns and have historically been treated as a single species, Pteridium aquilinum. Bracken is notorious as a toxic weed that colonizes open fields and poisons livestock. Bracken is also easily cultured and has become one of the most intensively studied ferns. Bracken has been used as a model system for the study of the fern life cycle, fern gametophyte development, the pheromonal mechanism of sex determination, toxicology, invasion ecology, and climate c

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Cox, Emma Susan. "The implications and effects of bracken (Pteridium aquilinum (L.) Kuhn) control on species diversity, re-vegetation and bracken preformance." Thesis, University of Liverpool, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.486440.

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Pteridium aquilium is the most widely distributed of all the pteridophytes; it is present throughout the world with the exception of hot and cold desert regions. Originally a component of open woodland commun.ltIes ItS. range has extended markedly as a result of mans' activities. The problems caused by bracken mfestatlOn are many and varied. Bracken infestation can cause considerable loss of revenue for farmers in terms of the reduction in available grazing land and through additional expenses such as veterinary fees and control costs. The quality of grazing is reduced due to the shading out o

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Pereira, Luciana Oliveira. "Apoptose induzida por extrato aquoso de Pteridium aquilinum em células de glândula submandibular humana (HSG) e de epitélio bucal (OSCC-3)." reponame:Repositório Institucional da UnB, 2006. http://repositorio.unb.br/handle/10482/5775.

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Dissertação (mestrado)—Universidade de Brasília, Instituto de Ciências Biológicas, Departamento de Biologia Celular, 2006.<br>Submitted by Fernanda Weschenfelder (nandaweschenfelder@gmail.com) on 2009-11-06T13:22:40Z No. of bitstreams: 1 Dissertacao Luciana Oliveira Pereira.pdf: 3419957 bytes, checksum: 43ae3c1efe69a8a2bbcf0d6b0b0d96bd (MD5)<br>Approved for entry into archive by Gomes Neide(nagomes2005@gmail.com) on 2010-10-27T13:48:50Z (GMT) No. of bitstreams: 1 Dissertacao Luciana Oliveira Pereira.pdf: 3419957 bytes, checksum: 43ae3c1efe69a8a2bbcf0d6b0b0d96bd (MD5)<br>Made available in D

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Pinto, Carlos Augusto. "Hematúria enzoótica bovina : contribuição para o seu estudo etiopatogénico." Doctoral thesis, Universidade Técnica de Lisboa. Faculdade de Medicina Veterinária, 2010. http://hdl.handle.net/10400.5/2797.

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Tese de Doutoramento em Ciências Veterinárias<br>A hematúria enzoótica bovina (HEB) é uma doença de evolução crónica caracterizada por episódios intermitentes de hematúria, relacionados com o desenvolvimento de lesões inflamatórias e neoplásicas na superfície interna da bexiga, em bovinos com mais de 2 anos de idade. Os tumores de bexiga (Tbx) são a principal manifestação lesional da HEB. No presente trabalho provou-se a associação entre a ingestão do feto comum (Pteridium aquilinum) e a HEB, identificaram-se as áreas da ilha de São Miguel mais afectadas pela HEB/Tbx, bem como, as práticas de

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J?NCK, Fernanda. "A intoxica??o de bovinos por Pteridium (aquilinum) arachnoideum em Santa Catarina e a identifica??o das bact?rias envolvidas nos infartos do quadro agudo." Universidade Federal Rural do Rio de Janeiro, 2014. https://tede.ufrrj.br/jspui/handle/jspui/2306.

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Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2018-05-11T20:37:02Z No. of bitstreams: 1 2014 - Fernanda J?nck.pdf: 8186762 bytes, checksum: 6eba6d05f3cab5ce4f35c47d8878ed0d (MD5)<br>Made available in DSpace on 2018-05-11T20:37:02Z (GMT). No. of bitstreams: 1 2014 - Fernanda J?nck.pdf: 8186762 bytes, checksum: 6eba6d05f3cab5ce4f35c47d8878ed0d (MD5) Previous issue date: 2014-12-16<br>CAPES<br>Pteridium (aquilinum) arachnoideum is a cosmopolitan plant, responsible for heavy losses in cattle for heavy losses in almost all Brazil. This plant causes three clinical pictures: an acute dise

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Guerin, Natalia. "Impacto da invasão e mecanismos de regeneração natural do cerradão em áreas ocupadas por Pteridium arachnoideum (kaulf.) Maxon (Dennstaedtiaceae) no sudoeste do Estado de São Paulo." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/18/18139/tde-06052010-084435/.

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As samambaias do gênero Pteridium caracterizam-se pelas largas frondes e por um sistema de rizomas subterrâneos que possibilita sua rápida expansão. Apresentam elevada produção de biomassa ao longo do ano, que aumenta a incidência de incêndios, e ainda liberam substâncias químicas consideradas alelopáticas. Atualmente, são conhecidas como plantas-problema, pois vêm se expandindo e ocupando grandes áreas em diversas partes do mundo, causando impacto econômico e ecológico. Nesse contexto, este estudo teve por objetivo geral a compreensão do impacto da invasão por Pteridium arachnoideum sobre a v

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Fortes, Maira Salomão. "Valores hematológicos, bioquímicos e urinálise em fêmeas nelore de diferentes faixas etárias provenientes de propriedades com e sem a presença de samambaia (Pteridium aquilinum, L. Kuhn)." Universidade Estadual de Londrina. Centro de Ciências Agrárias. Programa de Pós-Graduação em Ciência Animal, 2008. http://www.bibliotecadigital.uel.br/document/?code=vtls000135553.

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A Pteridium aquilinum, popularmente conhecida por samambaia, é um dos vegetais tóxicos mais preocupantes em vários países, incluindo o Brasil. Pesquisas caracterizaram, experimentalmente, três formas clínicas das doenças causadas pela samambaia aos bovinos: diátese hemorrágica, hematúria enzoótica dos bovinos e carcinomas epidermóides nas vias digestivas superiores. Todas as partes da samambaia contém os princípios tóxicos em forma ativa. Pesquisadores descrevem que a modificação mais importante observada é a anemia, e que a urina desses animais apresentam a variação no pH de 7,5 a 9,0, não ha

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Holloway, Stephen Mark. "Bracken (Pteridium aquilinum (L.) Kuhn) stand characterisation on the North York Moors : a study of the rhizome and frond system with regard to a large scale control programme." Thesis, University of Plymouth, 1994. http://hdl.handle.net/10026.1/2750.

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Large-scale rhizome sampling on the North York Moors together with an assessment of published bracken sampling protocols concluded that small-scale sampling of the rhizome system is inadequate to describe upland bracken stands accurately. It is also concluded that the frond cannot be used as an indicator of the rhizome system before or after treatment to achieve bracken control. An improved sampling strategy is proposed which increases the reliability of data collected and the validity of any conclusions drawn form such data. The structure of bracken rhizome systems, from separate stands on th

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Gobin, Rémy. "Contribution relative de la végétation du sous-bois dans la consommation en eau des placettes forestières soumises aux changements de climat et de pratiques." Thesis, Orléans, 2014. http://www.theses.fr/2014ORLE2070/document.

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Avec l'augmentation des sécheresses dans les forêts tempérées, la gestion sylvicole envisage de réduire la densité des peuplements adultes pour limiter le déficit hydrique. Cependant, la réduction de la canopée arborée augmente le rayonnement dans le sous-bois et permet le développement de la strate herbacée monopoliste. Nos objectifs étaient de caractériser l'évapotranspiration (ETu) de 4 herbacées monopolistes (Molinia caerulea, Calluna vulgaris, Pteridium aquilinum and Rubus sp.) et de quantifier leur impact sur la teneur en eau du sol (SWC) dans des peuplements de Quercus petraea. L’ETu de

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Polack, Evelyne Weber. "Toxicidade da Pteridium aquilinum (L.) Kuhn no Estado do Paraná : estudo epidemiologico e anatomo-patalógico e utilização da técnica de peroxidase-antiperoxidase na pesquisa do Papilomavirus em lesões atribuidas à ingestão da planta em bovinos." [s.n.], 1990. http://hdl.handle.net/1884/37224.

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Orintador: Pedro Ribas Werner<br>Tese (mestrado) - Universidade Federal do Paraná. Setor de Ciências Agrárias<br>Bibliografia: fl.96-102<br>Resumo: Poucos relatos existem na literatura científica sobre a importância da Pteredium aquilinum como planta tóxica e sobre a sua toxicidade no Estado do Paraná. Através de um estudo epidemiológico e anátomo-patológico verificou-se a ocorrência da planta e de intoxicações em bovinos em praticamente todo território do Estado do Paraná.Não se observaram casos de intoxicação nas demais espécies animais domésticas susceptíveis. Tendo em vista a freqüente oco

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Rebelo, Jorge Manuel Baeta Simões. "Biosynthesis and function of biological pteridines structural studies on two molybdopterin containing aldehyde oxido-reductases, from Desulfovibrio desulfuricans ATCC 27774 and from Desulfovibrio gigas, and the GTP cyclohydrolase I on E. coli, responsible for the first step of the tetrahydropterin biosynthesis /." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=972340319.

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Gonzales, Espinoza Christian. "Frecuencia y caracterización anátomo-hispatológica de las lesiones encontradas en bovinos con hematuria en Oxapamapa-Pasco." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2003. https://hdl.handle.net/20.500.12672/1566.

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Se realizó el estudio anátomo-histopatológico de muestras de vejiga urinaria, así como hígado, riñón y bazo, de 41 vacunos con cuadros lesionales de una enfermedad conocida en la provincia de Oxapampa (Pasco) como “Hematuria“ o “Intoxicación por Machicura“. Estos fueron obtenidos a partir de la inspección de 173 animales en el camal municipal de esta provincia, buscando correlacionar esta enfermedad local con la Hematuria Vesical Enzoótica Bovina (HVEB), enfermedad del ganado vacuno de distribución mundial. En el presente trabajo, se reporta que las lesiones halladas en la vejiga urinaria fue

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Guschin, Dmitrii. "Chemische Modifizierung von Pyranopterinen und deren Metallkomplexe strukturelle Modelle für Zentren in Metalloenzymen /." [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=967843537.

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Chatelet, Pascal. "Ptéridines non conjuguées et infections neuro-méningées." Lille 2, 1990. http://www.theses.fr/1990LIL2M349.

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Alfenas, Rafael Ferreira. "Produção de inóculo de Cylindrocladium pteridis em condições controladas." Universidade Federal de Viçosa, 2009. http://locus.ufv.br/handle/123456789/4375.

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Made available in DSpace on 2015-03-26T13:37:41Z (GMT). No. of bitstreams: 1 texto completo.pdf: 330706 bytes, checksum: 9be020e5be4feef0a4967a862388b2b0 (MD5) Previous issue date: 2009-10-26<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>To base the cultivation of Cylindrocladium pteridis and inoculation of the fungus under controlled conditions, was evaluated in this study sporulation in culture, conidial germination, mycelial growth and defoliation of eucalyptus at different temperatures. In preliminary experiments, we evaluated the effect of light and incubation time o

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