<?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>1390-0129</journal-id>
<journal-title><![CDATA[Revista Politécnica]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Politéc. (Quito)]]></abbrev-journal-title>
<issn>1390-0129</issn>
<publisher>
<publisher-name><![CDATA[Escuela Politécnica Nacional]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1390-01292017000300007</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Uso de Películas Comestibles a Base de Carboximetilcelulosa y Goma Xantana para la Disminución de Absorción de Grasa de Malanga Frita (Xanthosoma Sagittifolium)]]></article-title>
<article-title xml:lang="en"><![CDATA[Utilization of Edible Films Based on Carboxymethylcellulose and Xanthan Gum to Reduce Fat Uptake in a Deep-Fried Malanga (Xanthosoma Sagittifolium)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Morales]]></surname>
<given-names><![CDATA[Vanessa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santacruz]]></surname>
<given-names><![CDATA[Stalin]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad San Francisco de Quito  ]]></institution>
<addr-line><![CDATA[ Quito]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Laica Eloy Alfaro de Manabí  ]]></institution>
<addr-line><![CDATA[ Manta]]></addr-line>
<country>Ecuador</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2017</year>
</pub-date>
<volume>40</volume>
<numero>1</numero>
<fpage>7</fpage>
<lpage>12</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.senescyt.gob.ec/scielo.php?script=sci_arttext&amp;pid=S1390-01292017000300007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.senescyt.gob.ec/scielo.php?script=sci_abstract&amp;pid=S1390-01292017000300007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.senescyt.gob.ec/scielo.php?script=sci_pdf&amp;pid=S1390-01292017000300007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La malanga es un tubérculo poco explotado en el mercado ecuatoriano cuyas características nutricionales podrían ser un aporte importante a la dieta de sus consumidores. En el presente trabajo se estudió la utilización de películas comestibles a base de carboximetilcelulosa (CMC) y goma xantana como tratamiento previo a la fritura de malanga con el objeto de reducir el contenido de grasa en el producto frito. Para ello se trabajó con concentraciones de 0.5 y 1.5 % (w/v) de cada uno de los hidrocoloides con tiempos de inmersión de 0.5 y 1.5 minutos. Las muestras fueron analizadas mediante el contenido de grasa superficial, grasa total y humedad. Los resultados mostraron que el uso de CMC presentó menores contenidos de grasa superficial y grasa total que la goma xantana, con una reducción de la grasa total de 71.53 y 63.39 % para CMC y goma xantana respectivamente en relación al control. Para los dos hidrocoloides, el tratamiento que tuvo los menores contenidos de las variables antes citadas fue el tratamiento con 1.5% de concentración de CMC y 0.5 min de inmersión. El uso de recubrimientos previos a la fritura representa una buena alternativa para la obtención de malanga frita con menor contenido de grasa.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Malanga is an underutilised tuber in the Ecuadorian market despite its nutritional characteristics that may be important for the consumers. In the present work the use of edible films based on carboxymethylcellulose (CMC) and xanthan gum as pre-treatment to frying step to reduce the fat content of fried malanga was studied. The concentrations of the hydrocolloid utilised during the study were 0.5 and 1.5 % (w/v) with immersion times of 0.5 and 1.5 min. The fried samples were analysed on the superficial fat content, total fat content and moisture. Results showed that malanga tubers treated with CMC had lower superficial and total fat content than samples treated with xanthan gum. CMC and xanthan gum treatments showed a decrease of total fat content of 71.53 and 63.39 % respectively compared to the control sample (sample with no pre-treatment). The treatment that showed the lowest fat contents corresponded to 1.5% hydrocolloid concentration (CMC or xanthan gum) and 0.5 min immersion time. The use of edible films as an additional and previous step to frying showed to be a good choice to obtain frying malanga tubers with lower fat content.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[pretratamientos]]></kwd>
<kwd lng="es"><![CDATA[alimentos fritos]]></kwd>
<kwd lng="es"><![CDATA[grasa total]]></kwd>
<kwd lng="es"><![CDATA[grasa superficial]]></kwd>
<kwd lng="en"><![CDATA[pretreatments]]></kwd>
<kwd lng="en"><![CDATA[fried foods]]></kwd>
<kwd lng="en"><![CDATA[total fat]]></kwd>
<kwd lng="en"><![CDATA[superficial fat]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Effects of hydroclloids on apparent viscosity of batters and quality of chicken nuggets]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Altunakar]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Sahin]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Sumnu]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Chemical Engineering Communications.]]></source>
<year>2007</year>
<volume>193</volume>
<page-range>675-82</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="book">
<collab>AOAC</collab>
<source><![CDATA[Official Methods of Analysis]]></source>
<year>1984</year>
<publisher-loc><![CDATA[Washington DC ]]></publisher-loc>
<publisher-name><![CDATA[Association of Official Analytical Chemists]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Efecto de las condiciones de freído sobre la pérdida de humedad y ganancia de aceite en trozos de ñame (Dioscorea alata)]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bermúdez]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Velez]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Arrázola]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Ingeniería e Investigación]]></source>
<year>2010</year>
<volume>30</volume>
<page-range>41-4</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Structure Oil&#8211;Absorption Relationships During Deep-Fat Frying]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bouchon]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Aguilera]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Pyle]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<source><![CDATA[Food Engineering and Physical Properties]]></source>
<year>2003</year>
<volume>68</volume>
<page-range>2711-6</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Edible films and coatings: characteristics and properties]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bourtoom]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[International Food Research Journal]]></source>
<year>2008</year>
<volume>1</volume>
<page-range>237-48</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Embuscado]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Kerry]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Edible Films and Coatings for Food Applications]]></source>
<year>2009</year>
<conf-name><![CDATA[ Springer Science]]></conf-name>
<conf-loc>New York </conf-loc>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="book">
<collab>FAO</collab>
<source><![CDATA[Quality declared planting material]]></source>
<year>2010</year>
<publisher-loc><![CDATA[Roma CIP ]]></publisher-loc>
<publisher-name><![CDATA[Food and Agriculture Organization of the United Nations]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Decreasing Oil Uptake of Doughnuts During Deep-fat Frying Using Curdlan]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Funami]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Funami]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Tawada]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Nakao]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
</person-group>
<source><![CDATA[Journal of Food Science]]></source>
<year>1999</year>
<volume>64</volume>
<page-range>883-8</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Study of oil uptake and some quality attributes of potato chips affected by hydrocolloids]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Garmakhany]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Habib]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Mahdi]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Yahya]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[European Journal of Lipid Science and Technology]]></source>
<year>2008</year>
<volume>110</volume>
<page-range>1045-9</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Effect of blanching and coating with hydrocolloids on reduction of oil uptake in french fries]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pahade]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Sakhale]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<source><![CDATA[International Food Research Journal]]></source>
<year>2012</year>
<volume>19</volume>
<page-range>697-9</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Carboxymethyl cellulose and hydroxypropyl methyl cellulose as additives in reduction of oil content in batter based deep-fat fried boondis]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Priya]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Singhal]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Kulkarni]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Carbohydrate Polymers]]></source>
<year>1996</year>
<volume>29</volume>
<page-range>333-5</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pomeranz]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
</person-group>
<source><![CDATA[unctional Properties of Food Components]]></source>
<year>1991</year>
<conf-name><![CDATA[ California Academic Press Inc.]]></conf-name>
<conf-loc>California </conf-loc>
</nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Películas y recubrimientos comestibles: importancia y tendencias recientes la cadena hortofrutícola.]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Quintero]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Revista Tumbaga.]]></source>
<year>2010</year>
<volume>5</volume>
<page-range>93-118</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Decreasing of oil absorption in potato strips during deep fat frying]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rimac]]></surname>
<given-names><![CDATA[B.S.]]></given-names>
</name>
<name>
<surname><![CDATA[Lelas]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<name>
<surname><![CDATA[Rade]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Simundic]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<source><![CDATA[Journal of Food Engineering]]></source>
<year>2004</year>
<volume>64</volume>
<page-range>237-41</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Caracterización fisicoquímica, funcional y contenido fenólico de harina de malanga (Colocasia esculenta) cultivada en la región de Tuxtepec, Oaxaca, México]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rodríguez J.]]></surname>
<given-names><![CDATA[Miguel José]]></given-names>
</name>
<name>
<surname><![CDATA[Rivadeneyra]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Ramírez]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Juárez-Barrientos]]></surname>
<given-names><![CDATA[Esperanza J.]]></given-names>
</name>
<name>
<surname><![CDATA[Herrera]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Navarro]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<source><![CDATA[Ciencia y Mar.]]></source>
<year>2011</year>
<volume>15</volume>
<page-range>37-47</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Effects of batters containing different gum types on the quality of deep-fat fried chicken nuggets]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sahin]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Sumnu]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Altunakar]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<source><![CDATA[Journal of the Science of Food and Agriculture]]></source>
<year>2005</year>
<volume>85</volume>
<page-range>2375-9</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Effect of hydrocolloids incorporation in casing of samosa on reduction of oil uptake]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sakhale]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Badgujar]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Pawar]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<name>
<surname><![CDATA[Sananse]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Journal of Food Science and Technology]]></source>
<year>2011</year>
<volume>10</volume>
<page-range>769-72</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Shafiur]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Surface treatments and edible coatings in food preservation]]></source>
<year>2007</year>
<conf-name><![CDATA[ Handbook Of Food Preservation.]]></conf-name>
<conf-loc>United States: CRC Press </conf-loc>
</nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Using hydrocolloids to decrease oil absorption in banana chips.]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Singthong]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Chutima]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[LWT - Food Science and Technology]]></source>
<year>2009</year>
<volume>42</volume>
<page-range>1199-203</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Skurtys]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Acevedo]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Pedreschi]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Enrione]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Osorio]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Aguilera]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Food Hydrocolloid Edible Films and Coatings]]></source>
<year>2010</year>
<publisher-loc><![CDATA[New York ]]></publisher-loc>
<publisher-name><![CDATA[Nova Science Publishers]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Edible coating and post-frying centrifuge step effect on quality of vacuum-fried banana chips]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sothornvit]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Journal of Food Engineering.]]></source>
<year>2011</year>
<volume>107</volume>
<page-range>319-25</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
