<?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>2215-3896</journal-id>
<journal-title><![CDATA[Revista de Ciencias Ambientales]]></journal-title>
<abbrev-journal-title><![CDATA[Ciencias Ambientales]]></abbrev-journal-title>
<issn>2215-3896</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2215-38962020000200092</article-id>
<article-id pub-id-type="doi">10.15359/rca.54-2.5</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Reciclado de subproductos de origen animal: composición y valor nutritivo del pelo bovino hidrolizado hidrotérmicamente]]></article-title>
<article-title xml:lang="en"><![CDATA[Recycling of Animal By-Products: composition and Nutritional Value of Hydrothermally Hydrolyzed Bovine Hair]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mora-Maldonado]]></surname>
<given-names><![CDATA[Luz Elena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Maldonado-Santoyo]]></surname>
<given-names><![CDATA[María]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Padilla-Rizo]]></surname>
<given-names><![CDATA[Beatriz]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Estrada-Monje]]></surname>
<given-names><![CDATA[Anayansi]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Olivares]]></surname>
<given-names><![CDATA[Guadalupe]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Segoviano-Garfias]]></surname>
<given-names><![CDATA[José J. N.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro de Innovación Aplicada en Tecnologías Competitivas (CIATEC)  ]]></institution>
<addr-line><![CDATA[Guanajuato ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Centro de Innovación Aplicada en Tecnologías Competitivas (CIATEC)  ]]></institution>
<addr-line><![CDATA[Guanajuato ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Centro de Innovación Aplicada en Tecnologías Competitivas (CIATEC)  ]]></institution>
<addr-line><![CDATA[Guanajuato ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Centro de Innovación Aplicada en Tecnologías Competitivas (CIATEC)  ]]></institution>
<addr-line><![CDATA[Guanajuato ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Centro de Innovación Aplicada en Tecnologías Competitivas (CIATEC)  ]]></institution>
<addr-line><![CDATA[Guanajuato ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Universidad de Guanajuato Campus Irapuato ]]></institution>
<addr-line><![CDATA[Salamanca en Irapuato Guanajuato]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<volume>54</volume>
<numero>2</numero>
<fpage>92</fpage>
<lpage>110</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S2215-38962020000200092&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S2215-38962020000200092&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S2215-38962020000200092&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  (Introducción):  El pelo bovino, subproducto del proceso de trasformación de pieles, es rico en proteína queratina. Sin embargo, es poco aprovechado y su disposición final, generalmente, es el relleno sanitario. (Objetivo): Este trabajo promueve su reciclado, a través de su transformación a un producto alimenticio para animales, aplicando un proceso de hidrólisis hidrotérmica. (Metodología): Para ello, el pelo fue recolectado en una tenería local, lavado, molido (&lt;0.84 mm) e hidrolizado (130 °C/2.0 atm/90 min). Después, se caracterizó en su análisis elemental, termogravimétrico, proximal y calidad microbiológica. La presencia de metales pesados y minerales, fue determinado mediante espectrometría de emisión atómica de plasma acoplado por inducción y el perfil de aminoácidos mediante cromatografía de líquidos de alta resolución. (Resultados): Con el proceso propuesto, dicho material quedó libre de olor desagradable y textura suave y homogénea. Su estabilidad térmica fue menor a 170 °C. Presentó un contenido elemental de nitrógeno (13.80±0.61 %), carbono (46.23±1.18 %) y azufre (2.00±0.13 %). El análisis proximal reveló las siguientes composiciones (%): proteína bruta (85.2±2.5), digestible en pepsina (71.36±2.9), ceniza (2.20±0.1), extracto etéreo (4.90±0.4), extracto libre de nitrógeno (0.17±0.01) y humedad (7.53±0.2). Algunos minerales fueron encontrados (calcio, potasio, fósforo). Metales pesados y salmonella spp no fueron detectados. Se obtuvieron aminoácidos esenciales para la nutrición animal (lisina, metionina, treonina, arginina y valina), con recuperaciones mayores al 90 %. (Conclusiones): Con base en esta información, el pelo bovino residual puede ser reciclado, a las condiciones propuestas, para su transformación a un producto alimenticio alternativo, que provee nutrientes para animales.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  (Introduction):  Bovine hair, a by-product of the hide transformation process, is rich in keratin protein. However, it is little used, and its final disposal is, generally, the sanitary landfill. (Objective): This work promotes its recycling, through its transformation into a food product for animals, applying a hydrothermal hydrolysis process. (Methodology): For this, the hair was collected in a local tannery, washed, milled (&lt;0.84 mm), and hydrolyzed (130 °C/2.0 atm/90 min). Later, it was characterized in its elemental analysis, thermogravimetric analysis, proximal analysis, and microbiological quality. The presence of heavy metals and minerals was determined by induction-coupled plasma atomic-emission spectrometry and, the amino acid profile, by high-performance liquid chromatography. (Results): With the proposed process, this material was free of unpleasant odor, and with smooth and homogeneous texture. Its thermal stability was less than 170 °C. It presented an elemental content of nitrogen (13.80±0.61 %), carbon (46.23±1.18 %) and, sulfur (2.00±0.13 %). The proximal analysis revealed the following compositions (%): crude protein (85.2±2.5 %), digestible in pepsin (71.36±2.9); ash (2.20±0.1), ether extract (4.90±0.4), nitrogen-free extract (0.17±0.01) and, humidity (7.53±0.2). Some minerals were found (calcium, potassium, phosphorus). Heavy metals and Salmonella spp were not detected. Essential amino acids for animal nutrition (lysine, methionine, threonine, arginine and, valine) were obtained, with recoveries greater than 90 %. (Conclusions): Based on this information, residual bovine hair can be recycled, for transformation to an alternative food product, which provides nutrients, for animal feed.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Alimento para animales]]></kwd>
<kwd lng="es"><![CDATA[aminoácidos]]></kwd>
<kwd lng="es"><![CDATA[pelo de vaca]]></kwd>
<kwd lng="es"><![CDATA[queratina]]></kwd>
<kwd lng="en"><![CDATA[amino acids]]></kwd>
<kwd lng="en"><![CDATA[animal feed]]></kwd>
<kwd lng="en"><![CDATA[cow hair]]></kwd>
<kwd lng="en"><![CDATA[keratin]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Barrena]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Pagans]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Artola]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Vázquez]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Sánchez]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Co-composting of hair waste from the tanning industry with de-inking and municipal wastewater sludges]]></article-title>
<source><![CDATA[Biodegradation]]></source>
<year>2007</year>
<volume>18</volume>
<page-range>257-68</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bautista-Díaz]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
</person-group>
<source><![CDATA[Conversión técnica de proteínas, valorización de desechos proteicos]]></source>
<year>2016</year>
<publisher-name><![CDATA[AMV Ediciones]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bayramoglu]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Yorgancioglu]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Yeldiyar]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Onem]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Extraction of keratin from unhairing wastes of goatskin and creating new emulsion formulation containing keratin and caléndula flower]]></article-title>
<source><![CDATA[Calendula officialis L.]]></source>
<year>2014</year>
<volume>109</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>49-55</page-range><publisher-loc><![CDATA[JALCA ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bidlingmeyer]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Cohen]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Tarvin]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Rapid analysis of amino acids using pre-column derivatization]]></article-title>
<source><![CDATA[Journal of Chromatography B: Biomedical Sciences and Applications,]]></source>
<year>1984</year>
<volume>336</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>93-104</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Brebu]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Spiridion]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Thermal degradation of keratin waste]]></article-title>
<source><![CDATA[Journal of Analytical and Applied Pyrolysis]]></source>
<year>2011</year>
<volume>91</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>288-95</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Fernandes]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Fagundes]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Carvalho]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Maciel]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Oliveira]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The use of animal byproducts in broiler feeds. Use of animal co-products in broilers diets]]></article-title>
<source><![CDATA[Brazilian Journal of Poultry Science]]></source>
<year>2010</year>
<volume>12</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>41-6</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chojnacka]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Górecka]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Michalak]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[Górecki]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A review: Valorization of keratinous materials]]></article-title>
<source><![CDATA[Waste and Biomass Valor]]></source>
<year>2011</year>
<volume>2</volume>
<page-range>317-21</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Coward-Kelly]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Agbogbo]]></surname>
<given-names><![CDATA[F. K.]]></given-names>
</name>
<name>
<surname><![CDATA[Holtzapple]]></surname>
<given-names><![CDATA[M. T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Lime treatment of keratinous materials for the generation of highly digestible animal feed: 2. Animal hair]]></article-title>
<source><![CDATA[Bioresource Technology]]></source>
<year>2006</year>
<volume>91</volume>
<numero>11</numero>
<issue>11</issue>
<page-range>1344-52</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Esteban]]></surname>
<given-names><![CDATA[M. B.]]></given-names>
</name>
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[A. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Ramos]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Márquez]]></surname>
<given-names><![CDATA[M. C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Sub-critical water hydrolysis of hog hair for amino acid production]]></article-title>
<source><![CDATA[Bioresource Technology]]></source>
<year>2010</year>
<volume>101</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>2472-6</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<collab>Environmental Protection Agency (EPA)</collab>
<article-title xml:lang=""><![CDATA[Method 6010C (SW-846)]]></article-title>
<source><![CDATA[Inductively coupled plasma-atomic emission spectrometry]]></source>
<year>2007</year>
</nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<collab>Food and Agriculture Organization (FAO)</collab>
<article-title xml:lang=""><![CDATA[Quality assurance for animal feed analysis laboratories]]></article-title>
<source><![CDATA[FAO Animal Production and Health Manual]]></source>
<year>2011</year>
<volume>14</volume>
<publisher-loc><![CDATA[Rome ]]></publisher-loc>
<publisher-name><![CDATA[Autor]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="">
<collab>Food and Drug Administration (FDA)</collab>
<source><![CDATA[Bacteriological Analytical Manual, Chapter 3: Aerobic Plate Count]]></source>
<year>2001</year>
</nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<collab>Fundación Española para el Desarrollo de la Nutrición Animal (FEDNA)</collab>
<article-title xml:lang=""><![CDATA[Ingredientes para piensos]]></article-title>
<source><![CDATA[Harina de plumas hidrolizada]]></source>
<year>2012</year>
</nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Galarza]]></surname>
<given-names><![CDATA[B. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Garro]]></surname>
<given-names><![CDATA[M. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Cavello]]></surname>
<given-names><![CDATA[I. A]]></given-names>
</name>
<name>
<surname><![CDATA[Hours]]></surname>
<given-names><![CDATA[R. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Cantera]]></surname>
<given-names><![CDATA[C. S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Biotransformación fúngica del pelo vacuno: Correlación entre los cambios estructurales y la acción enzimática]]></article-title>
<source><![CDATA[6° Jornadas de Desarrollo e Innovación Tecnológica del Instituto Nacional de Tecnología Industrial]]></source>
<year>2007</year>
<publisher-loc><![CDATA[Argentina ]]></publisher-loc>
<publisher-name><![CDATA[Conicet]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[González]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Romero]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Valdivié]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Ponce-Palafox]]></surname>
<given-names><![CDATA[J. T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Los productos y subproductos vegetales, animales y agroindustriales: Una alternativa para la alimentación de la tilapia]]></article-title>
<source><![CDATA[Revista Bio Ciencias]]></source>
<year>2014</year>
<volume>2</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>240-51</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Horvath]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Solubility of structurally complicated materials: 3. Hair]]></article-title>
<source><![CDATA[The Scientific World Journal]]></source>
<year>2009</year>
<volume>9</volume>
<page-range>255-71</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="book">
<collab>Instituto Nacional de Ecología (INE)</collab>
<source><![CDATA[Manual de procedimientos para el manejo adecuado de los residuos de curtiduría]]></source>
<year>1999</year>
<publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[Autor]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Karthikeyan]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Balaji]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Sehgal]]></surname>
<given-names><![CDATA[P. K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Industrial applications of keratins-A review]]></article-title>
<source><![CDATA[Journal of Scientific and Industrial Research]]></source>
<year>2007</year>
<volume>66</volume>
<numero>9</numero>
<issue>9</issue>
<page-range>710-5</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Padilla-Rizo]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Maldonado-Santoyo]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Bautista-Rodríguez]]></surname>
<given-names><![CDATA[C. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Mora-Maldonado]]></surname>
<given-names><![CDATA[L. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Soto-Maldonado]]></surname>
<given-names><![CDATA[J. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Zitzumbo-Guzmán]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Arias-Hernández]]></surname>
<given-names><![CDATA[L. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Studying type wet blue tannery process for estimating environmental performance using the Life Cycle Analysis methodology: A Case Study in Mexico]]></article-title>
<source><![CDATA[International Journal of Scientific and Research Publications]]></source>
<year>2018</year>
<volume>8</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>415-27</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Popescu]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Höcker]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Hair-the most sophisticated biological composite material]]></article-title>
<source><![CDATA[Chemical Society Reviews]]></source>
<year>2007</year>
<volume>36</volume>
<page-range>1282-91</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rostagno]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Teixeira]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Hannas]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Lopes]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Sakomura]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Perazzo]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Saraiva]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[de Oliveira]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Tablas brasileñas para aves y cerdos]]></article-title>
<source><![CDATA[Composición de alimentos y requerimientos nutricionales]]></source>
<year>2017</year>
<publisher-loc><![CDATA[Brasil, Vicosa ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sánchez-Olivares]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Medina-Torres]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Calderas]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Sánchez-Solís]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Moreno-Morales]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Ramírez-González]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<name>
<surname><![CDATA[Manero]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Efecto de la biofibra de queratina en las propiedades de un biopolimero termoplástico: Estudio preliminar]]></article-title>
<source><![CDATA[Ingeniería Investigación y Tecnología]]></source>
<year>2017</year>
<volume>18</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>369-78</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<collab>Secretaría de Medio Ambiente y Recursos Naturales (SEMARNAT)</collab>
<article-title xml:lang=""><![CDATA[Norma oficial mexicana que establece las características, el procedimiento de identificación, clasificación y los listados de los residuos peligrosos.]]></article-title>
<source><![CDATA[NOM-052-SEMARNAT-2005]]></source>
<year>2006</year>
<publisher-name><![CDATA[Autor]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Song]]></surname>
<given-names><![CDATA[N. B.]]></given-names>
</name>
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[J. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Al-Mijan]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Song]]></surname>
<given-names><![CDATA[K. B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Development of a chicken feather protein film containing clove oil and its application in smoked salmon packaging]]></article-title>
<source><![CDATA[LWT-Food Science and Technology]]></source>
<year>2014</year>
<volume>57</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>453-60</page-range></nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sundar]]></surname>
<given-names><![CDATA[V. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Gnanamani]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Muralidharan]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Chandrababu]]></surname>
<given-names><![CDATA[N. K.]]></given-names>
</name>
<name>
<surname><![CDATA[Mandal]]></surname>
<given-names><![CDATA[A. B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Recovery and utilization of proteinous wastes of leather making: a review]]></article-title>
<source><![CDATA[Reviews in Environmental Science and Biotechnology]]></source>
<year>2011</year>
<volume>10</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>151-63</page-range></nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tesfaye]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Sithole]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Ramjugernath]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Chunilall]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Valorisation of chicken feathers: characterisation of chemical properties]]></article-title>
<source><![CDATA[Waste Management]]></source>
<year>2017</year>
<volume>68</volume>
<page-range>626-35</page-range></nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vázquez]]></surname>
<given-names><![CDATA[I. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Aguilera]]></surname>
<given-names><![CDATA[A. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Prado-Barragán]]></surname>
<given-names><![CDATA[L. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Aguilar]]></surname>
<given-names><![CDATA[C. N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Producción fúngica de proteasas inducidas con pelo de cerdo]]></article-title>
<source><![CDATA[Información Tecnológica]]></source>
<year>2008</year>
<volume>19</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>33-40</page-range></nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wiltafsky]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Fickler]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Hess]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<name>
<surname><![CDATA[Reimann]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[Zimmer]]></surname>
<given-names><![CDATA[U.]]></given-names>
</name>
<name>
<surname><![CDATA[Reising]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Heimbeck]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<source><![CDATA[AminoDAT 5.0. Animal Nutritionist´s Information Edge]]></source>
<year>2016</year>
<publisher-name><![CDATA[Evonik Nutrition Industries]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zhang]]></surname>
<given-names><![CDATA[Q.]]></given-names>
</name>
<name>
<surname><![CDATA[Shan]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Cao]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[He]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Lin]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
<name>
<surname><![CDATA[Huang]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Ao]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Mechanical and Biological Properties of Oxidized Horn Keratin]]></article-title>
<source><![CDATA[Materials Science and Engineering]]></source>
<year>2015</year>
<volume>47</volume>
<page-range>123-34</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
