<?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>1665-6423</journal-id>
<journal-title><![CDATA[Journal of applied research and technology]]></journal-title>
<abbrev-journal-title><![CDATA[J. appl. res. technol]]></abbrev-journal-title>
<issn>1665-6423</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ciencias Aplicadas y Tecnología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1665-64232024000400518</article-id>
<article-id pub-id-type="doi">10.22201/icat.24486736e.2024.22.4.2486</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[A novel synthesis and characterization of bio-based hydroxyapatite obtained from a residue of eggshells]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores]]></surname>
<given-names><![CDATA[J.]]></given-names>
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<surname><![CDATA[Cedillo]]></surname>
<given-names><![CDATA[J.]]></given-names>
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<surname><![CDATA[Castañeda]]></surname>
<given-names><![CDATA[A.]]></given-names>
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<surname><![CDATA[Esparza]]></surname>
<given-names><![CDATA[S.]]></given-names>
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<contrib contrib-type="author">
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<surname><![CDATA[López]]></surname>
<given-names><![CDATA[C.]]></given-names>
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<xref ref-type="aff" rid="Aff"/>
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<surname><![CDATA[Acuña]]></surname>
<given-names><![CDATA[P.]]></given-names>
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<xref ref-type="aff" rid="Aff"/>
</contrib>
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<surname><![CDATA[Sáenz]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Coahuila Facultad de Ciencias Químicas ]]></institution>
<addr-line><![CDATA[Saltillo Coahuila]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Benemérita Universidad Autónoma de Puebla ICUAP Centro de Química]]></institution>
<addr-line><![CDATA[Puebla Puebla]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma de Coahuila Facultad de Odontología ]]></institution>
<addr-line><![CDATA[Saltillo Coahuila]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Centro de Investigación en Química Aplicada  ]]></institution>
<addr-line><![CDATA[Saltillo Coahuila]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<volume>22</volume>
<numero>4</numero>
<fpage>518</fpage>
<lpage>526</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1665-64232024000400518&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1665-64232024000400518&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1665-64232024000400518&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Eggshells are waste generated in enormous quantities worldwide and can be utilized, as they are a rich source of Ca and can be converted into CaO through a thermal process. This is an efficient precursor for the synthesis of hydroxyapatite (Ha), it is an effective precursor for the synthesis of hydroxyapatite (Ha), which is a biomaterial. The aim of this work was to synthesize bio-based Ha from eggshells. The precipitation method was used, in which the addition of NH4OH, which is used in traditional synthesis, is omitted and the washes are conducted with water and citric acid. The eggshells, CaO obtained, and bio-based Ha were characterized by FTIR-(ATR), XRD and TGA, which allowed the functional groups, crystalline structure, and thermal stability of each material to be detected. The MTT assay on the NIH-3T3 fibroblast cell line showed that the viability exhibited 110.7% at a concentration of 200 &#956;g/mL.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Eggshell]]></kwd>
<kwd lng="en"><![CDATA[bio-based material]]></kwd>
<kwd lng="en"><![CDATA[biomedicine]]></kwd>
<kwd lng="en"><![CDATA[hydroxyapatite]]></kwd>
<kwd lng="en"><![CDATA[MTT and LDH assay]]></kwd>
</kwd-group>
</article-meta>
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