<?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>2007-0934</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias agrícolas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mex. Cienc. Agríc]]></abbrev-journal-title>
<issn>2007-0934</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-09342018000701524</article-id>
<article-id pub-id-type="doi">10.29312/remexca.v9i7.472</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Caracterización CaCO3 y CaC2O4 con análisis microfotográfico en Opuntia ficus-indica (L.) Miller.]]></article-title>
<article-title xml:lang="en"><![CDATA[Characterization CaCO3 and CaC2O4 with microphotographic analysis in Opuntia ficus-indica (L.) Miller]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zúñiga Valenzuela]]></surname>
<given-names><![CDATA[Rafael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gutiérrez Castorena]]></surname>
<given-names><![CDATA[Edgar Vladimir]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gutiérrez Castorena]]></surname>
<given-names><![CDATA[María Del Carmen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Olivares Sáenz]]></surname>
<given-names><![CDATA[Emilio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Méndez Gallegos]]></surname>
<given-names><![CDATA[Santiago de Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carranza de la Rosa]]></surname>
<given-names><![CDATA[Roberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vázquez Alvarado]]></surname>
<given-names><![CDATA[Rigoberto Eustacio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Nuevo León Facultad de Agronomía ]]></institution>
<addr-line><![CDATA[ Nuevo León]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Colegio de Posgraduados  ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
</aff>
<aff id="Af3">
<institution><![CDATA[,Colegio de Posgraduados  ]]></institution>
<addr-line><![CDATA[Salinas de Hidalgo San Luis Potosí]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>11</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>11</month>
<year>2018</year>
</pub-date>
<volume>9</volume>
<numero>7</numero>
<fpage>1524</fpage>
<lpage>1531</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-09342018000701524&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-09342018000701524&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-09342018000701524&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El consumo de calcio (Ca++) es más frecuente en la dieta humana por su biodisponibilidad y viabilidad de forma natural en el cultivo del nopal verdura (Opuntia ficus-indica L. Miller.); sin embargo, su disponibilidad es limitada por estrés hídrico en la planta al secuestrar Ca++ en forma de oxalato de calcio (CaC2O4). El estudio incursiona en análisis microfotográfico secuencial para elaborar mosaicos digitales de alta definición en muestras inalteradas del cladodios del nopal con 60 días de edad a diferenciales hídricas 10 y 30% de agua disponible (AD) y son procesadas en secciones delgadas (SD) de 30 micras (µm) de espesor, además de ser analizadas densitométricamente en tres diferentes fases de luz mediante un microscopio petrográfico, la caracterización de CaC2O4 y CaCO3 fue realizada por firma en formatos RGB caracterizando el tipo de compuesto, su núcleo, tamaño y textura. Los resultados obtenidos por tamaño de los CaC2O4 de 10 y 30% AD fueron: de 37.63µm y 71.39 µm en estos compuestos y los núcleos de dichos compuestos alcanzaron de 20.4 µm y 24.04 µm; con una textura de forma prismática y cubica, mientras que los CaCO3 para los mismos niveles de agua disponible: alcanzaron tamaño de 19.15µm y 20.86 µm con una textura cubica preponderante. Concluyendo que el tamaño de CaC2O4 y CaCO3 depende del estado de deshidratación de las plantas, así también se observó una correlación entre el tamaño del núcleo de CaC2O4, donde para cada CaC2O4 se fija un CaCO3, que no está disponible.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The consumption of calcium (Ca++) is more frequent in the human diet due to its bioavailability and viability naturally in the cultivation of the nopal vegetable (Opuntia ficus-indica L. Miller.); however, its availability is limited by water stress in the plant by sequestering Ca++ in the form of calcium oxalate (CaC2O4). The study delves into sequential microphotographic analysis to produce high definition digital mosaics in undisturbed samples of the nopal cladodes with 60 days of age at water differentials 10 and 30% of available water (AD) and are processed in thin sections (SD) of 30 microns (&#956;m) in thickness, besides being analyzed densitometrically in three different light phases by means of a petrographic microscope, the characterization of CaC2O4 and CaCO3 was carried out by signature in RGB formats characterizing the type of compound, its nucleus, size and texture. The results obtained by size of CaC2O4 of 10 and 30% A y D were: 37.63 &#956;m and 71.39 &#956;m in these compounds and the nuclei of these compounds reached 20.4 &#956;m and 24.04 &#956;m; with a texture of prismatic and cubic shape, while the CaCO3 for the same levels of available water: they reached size of 19.15&#956;m and 20.86&#956;m with a preponderant cubic texture. Concluding that the size of CaC2O4 and CaCO3 depends on the state of dehydration of the plants, as well as a correlation was observed between the size of the nucleus of CaC2O4, where for each CaC2O4 a CaCO3 is fixed, becoming unavailable.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[estrés hídrico]]></kwd>
<kwd lng="es"><![CDATA[mosaicos digitales]]></kwd>
<kwd lng="es"><![CDATA[nopal]]></kwd>
<kwd lng="es"><![CDATA[oxalato]]></kwd>
<kwd lng="en"><![CDATA[digital mosaics]]></kwd>
<kwd lng="en"><![CDATA[nopal]]></kwd>
<kwd lng="en"><![CDATA[oxalate]]></kwd>
<kwd lng="en"><![CDATA[water stress]]></kwd>
</kwd-group>
</article-meta>
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