<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2183-5985</journal-id>
<journal-title><![CDATA[Acta Portuguesa de Nutrição]]></journal-title>
<abbrev-journal-title><![CDATA[Acta Port Nutr]]></abbrev-journal-title>
<issn>2183-5985</issn>
<publisher>
<publisher-name><![CDATA[Associação Portuguesa de Nutrição]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2183-59852020000400036</article-id>
<article-id pub-id-type="doi">10.21011/apn.2020.2307</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[EFEITO DA PASTAGEM VERSUS SISTEMAS DE ALIMENTAÇÃO CONVENCIONAIS NA COMPOSIÇÃO DE LEITES PRODUZIDOS EM PORTUGAL]]></article-title>
<article-title xml:lang="en"><![CDATA[EFFECT OF PASTURE VERSUS CONVENTIONAL FEEDING SYSTEMS ON THE COMPOSITION OF MILK PRODUCED IN PORTUGAL]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Basto]]></surname>
<given-names><![CDATA[Bruna I]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Teixeira]]></surname>
<given-names><![CDATA[José A]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro de Engenharia Biológica da Universidade do Minho  ]]></institution>
<addr-line><![CDATA[Braga ]]></addr-line>
<country>Portugal</country>
</aff>
<pub-date pub-type="pub">
<day>30</day>
<month>12</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>30</day>
<month>12</month>
<year>2020</year>
</pub-date>
<numero>23</numero>
<fpage>36</fpage>
<lpage>39</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S2183-59852020000400036&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S2183-59852020000400036&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S2183-59852020000400036&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="pt"><p><![CDATA[RESUMO  INTRODUÇÃO:  O leite de vaca é amplamente consumido e considerado essencial para a dieta de milhares de milhões de pessoas em todo o mundo. A concentração de ácido linoléico conjugado e o rácio ómega-6/ómega-3 (&#969;6/&#969;3) têm sido associados à melhoria da saúde humana. Os fatores alimentares das vacas estão altamente relacionados com a composição lipídica do leite.  OBJETIVOS:  Comparar o efeito dos dois diferentes sistemas de alimentação (pastagem e convencional) na concentração de ácido linoléico conjugado e no rácio &#969;6/&#969;3 em leites produzidos em Portugal.  METODOLOGIA:  O estudo inclui a análise dos dados dos relatórios fornecidos, contendo os resultados das 12 amostras recolhidas (2018-2020) de 3 marcas diferentes (Portugal), e sua comparação gráfica.  RESULTADOS:  A concentração de ácido linoléico conjugado é sempre superior (em torno de 10 mg/100g de ácido linoléico conjugado) no leite A (leite de pastagem) e apresenta um perfil mais constante ao longo do período de amostragem. Além disso, o rácio &#969;6/&#969;3 do leite de pastagem apresenta um perfil mais constante e valores da razão mais próximos aos recomendados.  CONCLUSÕES:  O sistema de alimentação de pastagem produz leite mais enriquecido nutricionalmente, com uma composição mais constante nas diferentes estações do ano, e garante o bem-estar das vacas. O leite produzido por estes sistemas parece apresentar uma melhoria no perfil de ácidos gordos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  INTRODUCTION:  Cows&#8217; milk is widely consumed and is considered essential for the diet of billions of people worldwide. Conjugated linoleic acid and omega-6/omega-3 (&#969;6/&#969;3) ratio have been associated with the improvement of human health. The feed factors of cows are highly related with the lipidic composition of milk.  OBJECTIVES:  Compare the effect of the two different feeding systems (pasture and conventional) in conjugated linoleic acid concentration and in &#969;6/&#969;3 ratio in milk produced in Portugal.  METHODOLOGY:  The study includes the data analysis of the provided reports, containing the results of the 12 samples (2018-2020) from 3 different brands (Portugal), and their graphical comparison.  RESULTS:  The concentration of conjugated linoleic acid is always higher (around 10 mg/100g of conjugated linoleic acid) in milk A (pasture milk) and presents a more constant profile throughout the sampling period. Also, the &#969;6/&#969;3 ratio of pasture milk presents a more constant profile and the ratio values are the closest to the recommended.  CONCLUSIONS:  The pasture-feeding system produces milk more nutritionally enriched, with a composition more constant through the different seasons of the year and ensuring the welfare of cows. The milk produced by those systems appears to have an improved fatty acids profiling.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Conjugated linoleic acid]]></kwd>
<kwd lng="en"><![CDATA[Omega-6/omega-3 ratio]]></kwd>
<kwd lng="en"><![CDATA[Pasture milk]]></kwd>
<kwd lng="en"><![CDATA[Pasture-feeding system]]></kwd>
<kwd lng="pt"><![CDATA[Ácido linoléico conjugado]]></kwd>
<kwd lng="pt"><![CDATA[Rácio ómega-6/ómega-3]]></kwd>
<kwd lng="pt"><![CDATA[Leite de pastagem]]></kwd>
<kwd lng="pt"><![CDATA[Sistema de alimentação de pastagem]]></kwd>
</kwd-group>
</article-meta>
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