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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

CLA as a nutraceutical molecule: concentration in foods, estimation of intake in Italy and genetic factors affecting thesynthesis in animal tissue

CICOGNINI, FRANCESCA MARIA 19 February 2014 (has links)
Gli isomeri del CLA (Acido Linoleico Coniugato) potrebbero avere effetti benefici sulla salute in relazione al raggiungimento di un determinato intake, ma, per quanto ci è dato sapere, non esiste letteratura in Italia riguardante l'effettiva quantità di CLA negli alimenti e al relativo intake nell'uomo. Quindi è stata condotta una quantificazione degli isomeri c9,t11 e t10,c12 negli alimenti disponibili sul mercato italiano, seguita da una stima dell'intake di questi isomeri in una coorte della popolazione italiana attraverso un diario alimentare. Lo step successivo del progetto di ricerca, dovuto al livello molto basso di CLA trovato negli alimenti, è stato di investigare i fattori genetici che influenzano il CLA nella carne, per poter aumentare la concentrazione finale di CLA per il consumatore finale. Quindi gli obiettivi del lavoro sono stati: la stima dell'effettivo intake di CLA in Italia attraverso una completa analisi della concentrazione di c9,t11 e t10,c12 nei prodotti lattiero-caseari e carnei comunemente disponibili, e una valutazione dei fattori genetici coinvolti nella sintesi di CLA nella carne. / CLA could exert some healthy properties in relation to a needed daily intake, but, at our knowledge, no literature in Italy is currently available on the effective CLA amount in foods and on the relative intake in humans. Thus a quantification of c9,t11 and t10,c12 CLA isomers in foods available in Italy large retail-scale trade was performed, followed by an estimation of the isomers intake in a cohort of the Italian population by a food diary. Background 6 The following step of the research project, due to the very low concentration of CLA found in foods, investigated genetic factors affecting CLA in meat, in order to enhance its concentration for final consumers. Thus the aims of the present work were to estimate the effective CLA intake in Italy through a complete analisys of c9,t11 and t10,c12 concentrations in dairy and meat products commonly purchasable, and an evaluation on the genetic factors involved in CLA synthesis in meat.
2

Staphylococcus aureus isolados de linguiças suínas e de frango do tipo frescal: perfil de suscetibilidade e caracterização molecular / Staphylococcus aureus isolated from fresh pork and chicken sausages: profile of susceptibility and molecular characterization

Bernardo, Larissa Gomes 30 March 2015 (has links)
Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2016-08-05T11:28:33Z No. of bitstreams: 2 Dissertação - Larissa Gomes Bernardo - 2016.pdf: 1505576 bytes, checksum: d1e4cdc98f9bee2e3b82a6d8cdb3ed5d (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2016-08-05T11:32:00Z (GMT) No. of bitstreams: 2 Dissertação - Larissa Gomes Bernardo - 2016.pdf: 1505576 bytes, checksum: d1e4cdc98f9bee2e3b82a6d8cdb3ed5d (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2016-08-05T11:32:00Z (GMT). No. of bitstreams: 2 Dissertação - Larissa Gomes Bernardo - 2016.pdf: 1505576 bytes, checksum: d1e4cdc98f9bee2e3b82a6d8cdb3ed5d (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2015-03-30 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / This study aimed to isolate and identify Staphylococcus aureus in fresh sausages that were handmade or industrially produced, and characterize isolates for susceptibility to antimicrobial agents and the presence of virulence genes. We collected 86 samples of fresh sausages, pork and chicken, in butchers of the city of Aparecida de Goiânia, Goiás. The temperature of the sausages was also measured at the time of collection. After microbiological analysis, the isolates were submitted to the antibiogram by disk diffusion technique, to typing by Pulsed Field Gel Electrophoresis and to detection of virulence genes by Polymerase Chain Reaction. Most sausages collected (68.6%) showed temperature above 4 ° C, ranging from 4.98 °C to 9.89 °C. Six samples were contaminated with Staphylococcus sp., with seven isolates, but with scores within the standard set by the Brazilian law (5.0 x 103 colony forming units per gram). Of the seven isolates obtained from different brands, collected in different butchers, three were identified as Staphylococcus aureus by detection of the femA gene, were sensitive to all antibiotics tested and showed 100% similarity by Pulsed Field. The genes encoding the hemolysins A and B, and enterotoxin H were detected in three of S. aureus strains and in one of them were already detected the genes encoding enterotoxins G and I. The survey allowed to detect S. aureus in fresh sausages, and the possibility of expression of enterotoxins genes., The presence of isolates genetically identical identified in samples obtained of distinct brands and from different butchers indicate common source of contamination or spread of particular strains in this type of food. It should be noted therefore the need to observe the product's storage conditions such as temperature when that significant amounts of toxins are not produced and become risk for the occurrence of outbreaks. / Este estudo teve como objetivo isolar e identificar Staphylococcus aureus em linguiças frescais, fabricadas artesanalmente ou de modo industrial, e caracterizar os isolados quanto à suscetibilidade a antimicrobianos e à presença de genes de virulência. Foram coletadas 86 amostras de linguiças frescais, suína e de frango, em açougues do Município de Aparecida de Goiânia, Goiás. A temperatura das linguiças foi aferida no momento da coleta. Após análise microbiológica, realizou-se o antibiograma pela técnica de disco-difusão, tipagem microbiana por eletroforese em gel em campo pulsado e detecção de genes de virulência pela Reação em Cadeia de Polimerase. A maioria das linguiças coletadas (68,6%) apresentaram temperatura superior a 4 ºC, variando de 4,98 ºC a 9,89 ºC. Seis amostras estavam contaminadas por Staphylococcus sp., sendo obtidos sete isolados, porém com contagens conforme o padrão estabelecido pela legislação brasileira em vigor (5,0 x 103 unidades formadoras de colônia por grama). Dos sete isolados, três obtidos de amostras de marcas distintas, coletados em açougues diferentes, foram identificados como Staphylococcus aureus pela detecção do gene femA, apresentaram sensibilidade a todos os antibióticos testados e 100% de similaridade pela técnica de Pulsed Field. Foi detectada a presença de genes que codificam as hemolisinas A e B e a enterotoxina H nos três isolados de S. aureus e em um deles ainda foram detectados os genes que codificam as enterotoxinas G e I. A pesquisa permitiu detectar S. aureus em linguiças frescais e a possibilidade de expressão de genes de enterotoxinas. A presença de isolados semelhantes geneticamente, identificados em amostras oriundas de açougues diferentes e de marcas distintas, indicam origem comum de contaminação ou difusão de linhagens particulares neste tipo de alimento. Ressalta-se portanto, a necessidade de se observar as condições de armazenamento do produto como a temperatura, para que quantidades expressivas de toxinas não sejam produzidas e se tornem risco para a ocorrência de surtos de origem alimentar.
3

Regionální trh vybranými bio komoditami: bio maso / Market of selected organic commodities (organic meat)

LEŠTINOVÁ, Iva January 2014 (has links)
This thesis deals with the organic livestock production in South Bohemian region. The aim of the thesis was to analyze the South Bohemian organic meat production, production of eggs and honey and distribution of the biocommodities. Through the processing of data from the database IAEI and questionnaire survey, conducted at the level of organic farmers farming in the South Bohemian region with a valid certificate for meat production, development and the current market situation of organic meat production were assessed in the South Bohemian region.

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