<?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>2007-4026</journal-id>
<journal-title><![CDATA[Ingeniería agrícola y biosistemas]]></journal-title>
<abbrev-journal-title><![CDATA[Ing. agric. biosist.]]></abbrev-journal-title>
<issn>2007-4026</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma Chapingo]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-40262020000100069</article-id>
<article-id pub-id-type="doi">10.5154/r.inagbi.2019.08.055</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Calcium-loaded gelatin nanoparticles as a source of agricultural fertilizer]]></article-title>
<article-title xml:lang="es"><![CDATA[Nanopartículas de gelatina cargadas con calcio como fuente de fertilizante agrícola]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Juan-Martínez]]></surname>
<given-names><![CDATA[Erwin San]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sandoval-Villa]]></surname>
<given-names><![CDATA[Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Trejo-Téllez]]></surname>
<given-names><![CDATA[Libia Iris]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jiménez-Flores]]></surname>
<given-names><![CDATA[Yolanda]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aguilar-Méndez]]></surname>
<given-names><![CDATA[Miguel Ángel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Politécnico Nacional CICATA ]]></institution>
<addr-line><![CDATA[ Ciudad de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Colegio de Postgraduados Campus Montecillo ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma Metropolitana  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<volume>12</volume>
<numero>1</numero>
<fpage>69</fpage>
<lpage>77</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-40262020000100069&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-40262020000100069&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-40262020000100069&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: The productivity of current agricultural practices depends largely on the use of fertilizers. A major limitation of conventional fertilizers is their low crop yields, so the development and application of new types of fertilizers using nanotechnology are potentially effective options for increasing agricultural production.  Objective:  To synthesize and characterize calcium-loaded gelatin nanoparticles, and evaluate their behavior as controlled-release systems.  Methodology: The nanoparticles were obtained by spray drying. The physicochemical characteristics of the particles were analyzed by scanning electron microscopy and FTIR spectroscopy, while their behavior as controlled release systems was evaluated by in vitro tests.  Results: Calcium-loaded gelatin nanoparticles with average sizes below 700 nm, mainly spherical morphology and smooth microstructure were obtained. FTIR spectra showed the formation of electrostatic interactions between the charge and the gelatin. In vitro tests allowed to assume that the biopolymer matrix acted adequately in the controlled release of calcium ions.  Limitations of the study: The physicochemical characteristics of nanomaterials only apply to the processing conditions used.  Originality: There are no reports on calcium-loaded biopolymer nanomaterials with potential application in agriculture.  Conclusions: Gelatin nanoparticles, with adequate morphology and sizes, which act as controlled calcium release systems were obtained.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción:  La productividad de las prácticas agrícolas actuales depende en gran medida del uso de fertilizantes. Una limitación importante de los fertilizantes convencionales es su bajo aprovechamiento por parte de los cultivos, por lo que el desarrollo y la aplicación de nuevos tipos de fertilizantes utilizando nanotecnología son una opción potencialmente efectiva para incrementar la producción agrícola.  Objetivo: Sintetizar y caracterizar nanopartículas de gelatina cargadas con calcio, y evaluar su comportamiento como sistemas de liberación controlada.  Metodología: Las nanopartículas se obtuvieron mediante secado por aspersión. Las características fisicoquímicas de las partículas se analizaron mediante microscopia electrónica de barrido y espectroscopia FTIR, mientras que su comportamiento como sistemas de liberación controlada se evaluó mediante pruebas in vitro.  Resultados: Se obtuvieron nanopartículas de gelatina cargadas con calcio, con tamaños promedio menores a 700 nm, morfología principalmente esférica y microestructura lisa. Los espectros FTIR evidenciaron la formación de interacciones electrostáticas entre la carga y la gelatina. Las pruebas in vitro permitieron suponer que la matriz biopolimérica actuó adecuadamente en la liberación controlada de iones de calcio.  Limitaciones del estudio: Las características fisicoquímicas de los nanomateriales solo aplican para las condiciones de elaboración utilizadas.  Originalidad: No existen reportes sobre nanomateriales biopoliméricos cargados con calcio con potencial aplicación en la agricultura.  Conclusiones: Se obtuvieron nanopartículas de gelatina, con morfología y tamaños adecuados, que actúan como sistemas de liberación controlada de calcio.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[nanomaterial]]></kwd>
<kwd lng="en"><![CDATA[nanofertilizer]]></kwd>
<kwd lng="en"><![CDATA[biopolymer]]></kwd>
<kwd lng="en"><![CDATA[controlled release]]></kwd>
<kwd lng="es"><![CDATA[nanomaterial]]></kwd>
<kwd lng="es"><![CDATA[nanofertilizante]]></kwd>
<kwd lng="es"><![CDATA[biopolímero]]></kwd>
<kwd lng="es"><![CDATA[liberación controlada]]></kwd>
</kwd-group>
</article-meta>
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