Lácteos: atributos valorizados na compra, perfil de ácidos graxos e efeitos do ácido linoléico conjugado no metabolismo lipídico
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Manancial - Repositório Digital da UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/3389 |
Resumo: | The relationships between nutrition and health have been studied throughout recent years as a result of the growing concern about the population s health. Consumers are increasingly more demanding about the quality of food consumed, inclusively worrying about attributes that go beyond the presence of nutrients and food security, but also concerning about health benefits. The following research aimed to understand which consumer perceptions about the role of animal fats in health and attributes are valued in buying dairy products, determining the levels of conjugated linoleic acid in milk produced in the state of Rio Grande do Sul as well as assessing the antiatherogenic potential of conjugated linoleic acid. In the first chapter of the thesis it was analyzed the behavior of consumers before the purchase of milk, where it is observed that 83% of respondents consume milk and crucial aspects for the consumer is the relationship price and taste. There is a good perspective on buying products with higher levels of conjugated linoleic acid and bringing benefits to consumer s health. Due to the wide and varied range of dairy products, consumer was induced to become more demanding about the quality of the product offered. In Chapter 2, it was determined the fatty acid profile in dairy (milk, cheese, and butter) produced in the state of Rio Grande do Sul and it was found that the composition was similar in both types of milk products produced in Rio Grande do Sul, including as to the presence of conjugated linoleic acid. CLA levels varied according to regions and seasons studied, which showed higher levels in the southern portion of the state and in the spring and winter. The CLA content in milk products produced in southern Brazil have higher values than those reported for dairy products from other countries, including those of temperate climate, which show higher values of this constituent. In chapter, it was assessed the effect of different lipid sources and antiatherogenic potential of conjugated linoleic acid in rabbits fed a diet containing butter, margarine, soybean oil, and synthetic CLA. The results, through hierarchical cluster analysis, showed similar variables in animals that consumed butter and soybean oil + CLA and another group with margarine and soy oil. HDL levels were higher in the treatment that received diet with conjugated linoleic acid and LDL was reduced. The reasons TC:HDL and LDL:HDL significantly increased in the group that consumed margarine. The inclusion of CLA, even at low levels, such as 0.1% in the diet of rabbits exerts inhibitory effect on atherogenesis, since lower levels of LDL cholesterol and higher levels of HDL cholesterol are associated with decreased cardiovascular risk. |
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Lácteos: atributos valorizados na compra, perfil de ácidos graxos e efeitos do ácido linoléico conjugado no metabolismo lipídicoDairy products: attributes valued in purchasing, fatty acids profile and effects of conjugated linoleic acid on lipid metabolismÁcidos graxosÁcido linoleico conjugadoAteroscleroseCoelhosConsumidorLácteosFatty acidsConjugated linoleic acidAtherosclerosisRabbitsConsumerDairy productsCNPQ::CIENCIAS AGRARIAS::CIENCIA E TECNOLOGIA DE ALIMENTOSThe relationships between nutrition and health have been studied throughout recent years as a result of the growing concern about the population s health. Consumers are increasingly more demanding about the quality of food consumed, inclusively worrying about attributes that go beyond the presence of nutrients and food security, but also concerning about health benefits. The following research aimed to understand which consumer perceptions about the role of animal fats in health and attributes are valued in buying dairy products, determining the levels of conjugated linoleic acid in milk produced in the state of Rio Grande do Sul as well as assessing the antiatherogenic potential of conjugated linoleic acid. In the first chapter of the thesis it was analyzed the behavior of consumers before the purchase of milk, where it is observed that 83% of respondents consume milk and crucial aspects for the consumer is the relationship price and taste. There is a good perspective on buying products with higher levels of conjugated linoleic acid and bringing benefits to consumer s health. Due to the wide and varied range of dairy products, consumer was induced to become more demanding about the quality of the product offered. In Chapter 2, it was determined the fatty acid profile in dairy (milk, cheese, and butter) produced in the state of Rio Grande do Sul and it was found that the composition was similar in both types of milk products produced in Rio Grande do Sul, including as to the presence of conjugated linoleic acid. CLA levels varied according to regions and seasons studied, which showed higher levels in the southern portion of the state and in the spring and winter. The CLA content in milk products produced in southern Brazil have higher values than those reported for dairy products from other countries, including those of temperate climate, which show higher values of this constituent. In chapter, it was assessed the effect of different lipid sources and antiatherogenic potential of conjugated linoleic acid in rabbits fed a diet containing butter, margarine, soybean oil, and synthetic CLA. The results, through hierarchical cluster analysis, showed similar variables in animals that consumed butter and soybean oil + CLA and another group with margarine and soy oil. HDL levels were higher in the treatment that received diet with conjugated linoleic acid and LDL was reduced. The reasons TC:HDL and LDL:HDL significantly increased in the group that consumed margarine. The inclusion of CLA, even at low levels, such as 0.1% in the diet of rabbits exerts inhibitory effect on atherogenesis, since lower levels of LDL cholesterol and higher levels of HDL cholesterol are associated with decreased cardiovascular risk.Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorAs relações entre nutrição e saúde vêm sendo estudadas nos últimos anos, como consequência da preocupação da população com a saúde. Os consumidores estão mais exigentes em relação à qualidade dos alimentos consumidos, preocupando-se com atributos que vão além da presença de nutrientes e segurança alimentar, mas que apresentam também benefícios à saúde. Objetivou-se com o trabalho, entender qual a percepção do consumidor sobre o papel da gordura animal na saúde e os atributos valorizados na compra de produtos lácteos, determinar o perfil de ácidos graxos com ênfase no ácido linoleico conjugado em lácteos produzidos no Rio Grande do Sul e avaliar o potencial antiaterogênico do ácido linoléico conjugado. No primeiro capítulo da tese analisou-se o comportamento dos consumidores frente à compra de lácteos, observa-se que 83% dos entrevistados consomem leite e os aspectos mais importantes são a relação preço e sabor. Existe uma boa perspectiva em relação à compra por produtos com teores mais elevados de ácido linoléico conjugado e que tragam benefícios a saúde do consumidor. Em função da grande e variada oferta de produtos lácteos, induziu o consumidor a tornar-se mais exigente em relação à qualidade do produto oferecido. No capítulo 2 determinou-se o perfil de ácidos graxos em lácteos (leite, queijo e manteiga) produzidos no Rio Grande do Sul e, verificou-se que a composição foi semelhante entre os tipos de produtos lácteos produzidos, inclusive quanto a presença do ácido linoléico conjugado. Os níveis de CLA variaram conforme as regiões e estações climáticas estudadas, onde apresentaram maiores teores na região Sul do Rio Grande do Sul e nas estações da primavera e inverno. O conteúdo em CLA de produtos lácteos produzidos na região Sul do Brasil possuem valores superiores aos relatados para produtos lácteos de outros países, inclusive naqueles de clima temperado, os quais demonstram maiores valores deste constituinte. No capítulo 3 avaliou-se o efeito de diferentes fontes lipídicas e o potencial antiaterogênico do ácido linoléico conjugado em coelhos alimentados com dietas contendo manteiga, margarina, óleo de soja e CLA sintético. Os resultados, através da análise de agrupamento hierárquico, acusaram semelhança nas variáveis dos animais que consumiram manteiga e óleo de soja+CLA e outro grupo pela margarina e óleo de soja. Os níveis de HDL foram maiores no tratamento que recebeu dieta com ácido linoléico conjugado e o LDL foi reduzido. As razões CT:HDL e LDL:HDL apresentaram aumento significativo no grupo que consumiu margarina. A inclusão de CLA, mesmo em níveis baixos, como 0,1% na dieta de coelhos exerce efeito inibitório sobre a aterogênese, pois como observado nesta pesquisa, os menores níveis de colesterol LDL e maiores níveis de colesterol HDL estão associados a diminuição de risco cardiovascular.Universidade Federal de Santa MariaBRCiência e Tecnologia dos AlimentosUFSMPrograma de Pós-Graduação em Ciência e Tecnologia dos AlimentosNörnberg, José Laertehttp://lattes.cnpq.br/1252443045127710Hecktheuer, Luisa Helena Rycheckihttp://lattes.cnpq.br/7926116604048817Nornberg, Maria de Fátima Barros Lealhttp://lattes.cnpq.br/5959573150618842Schafhäuser Junior, Jorgehttp://lattes.cnpq.br/8810339189755094Rech, Virginia Cielohttp://lattes.cnpq.br/0969715025616160Fuke, Gitane2013-09-272013-09-272012-11-13info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisapplication/pdfapplication/pdfFUKE, Gitane. Dairy products: attributes valued in purchasing, fatty acids profile and effects of conjugated linoleic acid on lipid metabolism. 2012. 107 f. Tese (Doutorado em Ciência e Tecnologia dos Alimentos) - Universidade Federal de Santa Maria, Santa Maria, 2012.http://repositorio.ufsm.br/handle/1/3389porinfo:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM2022-08-22T18:05:12Zoai:repositorio.ufsm.br:1/3389Biblioteca Digital de Teses e Dissertaçõeshttps://repositorio.ufsm.br/ONGhttps://repositorio.ufsm.br/oai/requestatendimento.sib@ufsm.br||tedebc@gmail.comopendoar:2022-08-22T18:05:12Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
Lácteos: atributos valorizados na compra, perfil de ácidos graxos e efeitos do ácido linoléico conjugado no metabolismo lipídico Dairy products: attributes valued in purchasing, fatty acids profile and effects of conjugated linoleic acid on lipid metabolism |
title |
Lácteos: atributos valorizados na compra, perfil de ácidos graxos e efeitos do ácido linoléico conjugado no metabolismo lipídico |
spellingShingle |
Lácteos: atributos valorizados na compra, perfil de ácidos graxos e efeitos do ácido linoléico conjugado no metabolismo lipídico Fuke, Gitane Ácidos graxos Ácido linoleico conjugado Aterosclerose Coelhos Consumidor Lácteos Fatty acids Conjugated linoleic acid Atherosclerosis Rabbits Consumer Dairy products CNPQ::CIENCIAS AGRARIAS::CIENCIA E TECNOLOGIA DE ALIMENTOS |
title_short |
Lácteos: atributos valorizados na compra, perfil de ácidos graxos e efeitos do ácido linoléico conjugado no metabolismo lipídico |
title_full |
Lácteos: atributos valorizados na compra, perfil de ácidos graxos e efeitos do ácido linoléico conjugado no metabolismo lipídico |
title_fullStr |
Lácteos: atributos valorizados na compra, perfil de ácidos graxos e efeitos do ácido linoléico conjugado no metabolismo lipídico |
title_full_unstemmed |
Lácteos: atributos valorizados na compra, perfil de ácidos graxos e efeitos do ácido linoléico conjugado no metabolismo lipídico |
title_sort |
Lácteos: atributos valorizados na compra, perfil de ácidos graxos e efeitos do ácido linoléico conjugado no metabolismo lipídico |
author |
Fuke, Gitane |
author_facet |
Fuke, Gitane |
author_role |
author |
dc.contributor.none.fl_str_mv |
Nörnberg, José Laerte http://lattes.cnpq.br/1252443045127710 Hecktheuer, Luisa Helena Rychecki http://lattes.cnpq.br/7926116604048817 Nornberg, Maria de Fátima Barros Leal http://lattes.cnpq.br/5959573150618842 Schafhäuser Junior, Jorge http://lattes.cnpq.br/8810339189755094 Rech, Virginia Cielo http://lattes.cnpq.br/0969715025616160 |
dc.contributor.author.fl_str_mv |
Fuke, Gitane |
dc.subject.por.fl_str_mv |
Ácidos graxos Ácido linoleico conjugado Aterosclerose Coelhos Consumidor Lácteos Fatty acids Conjugated linoleic acid Atherosclerosis Rabbits Consumer Dairy products CNPQ::CIENCIAS AGRARIAS::CIENCIA E TECNOLOGIA DE ALIMENTOS |
topic |
Ácidos graxos Ácido linoleico conjugado Aterosclerose Coelhos Consumidor Lácteos Fatty acids Conjugated linoleic acid Atherosclerosis Rabbits Consumer Dairy products CNPQ::CIENCIAS AGRARIAS::CIENCIA E TECNOLOGIA DE ALIMENTOS |
description |
The relationships between nutrition and health have been studied throughout recent years as a result of the growing concern about the population s health. Consumers are increasingly more demanding about the quality of food consumed, inclusively worrying about attributes that go beyond the presence of nutrients and food security, but also concerning about health benefits. The following research aimed to understand which consumer perceptions about the role of animal fats in health and attributes are valued in buying dairy products, determining the levels of conjugated linoleic acid in milk produced in the state of Rio Grande do Sul as well as assessing the antiatherogenic potential of conjugated linoleic acid. In the first chapter of the thesis it was analyzed the behavior of consumers before the purchase of milk, where it is observed that 83% of respondents consume milk and crucial aspects for the consumer is the relationship price and taste. There is a good perspective on buying products with higher levels of conjugated linoleic acid and bringing benefits to consumer s health. Due to the wide and varied range of dairy products, consumer was induced to become more demanding about the quality of the product offered. In Chapter 2, it was determined the fatty acid profile in dairy (milk, cheese, and butter) produced in the state of Rio Grande do Sul and it was found that the composition was similar in both types of milk products produced in Rio Grande do Sul, including as to the presence of conjugated linoleic acid. CLA levels varied according to regions and seasons studied, which showed higher levels in the southern portion of the state and in the spring and winter. The CLA content in milk products produced in southern Brazil have higher values than those reported for dairy products from other countries, including those of temperate climate, which show higher values of this constituent. In chapter, it was assessed the effect of different lipid sources and antiatherogenic potential of conjugated linoleic acid in rabbits fed a diet containing butter, margarine, soybean oil, and synthetic CLA. The results, through hierarchical cluster analysis, showed similar variables in animals that consumed butter and soybean oil + CLA and another group with margarine and soy oil. HDL levels were higher in the treatment that received diet with conjugated linoleic acid and LDL was reduced. The reasons TC:HDL and LDL:HDL significantly increased in the group that consumed margarine. The inclusion of CLA, even at low levels, such as 0.1% in the diet of rabbits exerts inhibitory effect on atherogenesis, since lower levels of LDL cholesterol and higher levels of HDL cholesterol are associated with decreased cardiovascular risk. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-11-13 2013-09-27 2013-09-27 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
FUKE, Gitane. Dairy products: attributes valued in purchasing, fatty acids profile and effects of conjugated linoleic acid on lipid metabolism. 2012. 107 f. Tese (Doutorado em Ciência e Tecnologia dos Alimentos) - Universidade Federal de Santa Maria, Santa Maria, 2012. http://repositorio.ufsm.br/handle/1/3389 |
identifier_str_mv |
FUKE, Gitane. Dairy products: attributes valued in purchasing, fatty acids profile and effects of conjugated linoleic acid on lipid metabolism. 2012. 107 f. Tese (Doutorado em Ciência e Tecnologia dos Alimentos) - Universidade Federal de Santa Maria, Santa Maria, 2012. |
url |
http://repositorio.ufsm.br/handle/1/3389 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria BR Ciência e Tecnologia dos Alimentos UFSM Programa de Pós-Graduação em Ciência e Tecnologia dos Alimentos |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria BR Ciência e Tecnologia dos Alimentos UFSM Programa de Pós-Graduação em Ciência e Tecnologia dos Alimentos |
dc.source.none.fl_str_mv |
reponame:Manancial - Repositório Digital da UFSM instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
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UFSM |
institution |
UFSM |
reponame_str |
Manancial - Repositório Digital da UFSM |
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Manancial - Repositório Digital da UFSM |
repository.name.fl_str_mv |
Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
atendimento.sib@ufsm.br||tedebc@gmail.com |
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1805922171768274944 |