<?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>0188-6266</journal-id>
<journal-title><![CDATA[Acta universitaria]]></journal-title>
<abbrev-journal-title><![CDATA[Acta univ]]></abbrev-journal-title>
<issn>0188-6266</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Guanajuato, Dirección de Investigación y Posgrado]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-62662024000100152</article-id>
<article-id pub-id-type="doi">10.15174/au.2024.4197</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Sonda didáctica para espectrofotometría visible]]></article-title>
<article-title xml:lang="en"><![CDATA[Teaching probe for visible spectrophotometry]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Orlando Guerrero]]></surname>
<given-names><![CDATA[Israel Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández Paxtián]]></surname>
<given-names><![CDATA[Zulma Janet]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez Acevedo]]></surname>
<given-names><![CDATA[Miguel Ángel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de la cañada Instituto de tecnología de los alimentos ]]></institution>
<addr-line><![CDATA[Teotitlán de Flores Magón Oaxaca]]></addr-line>
<country>México</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>34</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-62662024000100152&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-62662024000100152&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-62662024000100152&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Las sondas empleadas en el aula para el aprendizaje de física permiten al alumno medir y desplegar variables en tiempo real. Su principal objetivo en la educación es unir la ciencia, la tecnología, la ingeniería y las matemáticas (STEM, por sus siglas en inglés), con el fin de mejorar el aprendizaje de los estudiantes. En esta investigación se presenta el diseño óptico y mecánico, así como el algoritmo de control, de una sonda empleada para el aprendizaje del concepto transmitancia de luz. La sonda consiste en un espectrofotómetro de un solo haz y una cámara digital conectada a una computadora. Los componentes del espectrofotómetro fueron alineados y ensamblados en una carcasa manufacturada con una impresora 3D. El desempeño de la sonda fue evaluado por medio de cuatro muestras estándares empleadas en espectroscopía, y sus gráficas de transmitancia muestran máximos característicos reportados en la literatura, lo cual demuestra un buen desempeño de la sonda para la educación STEM.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The probes used in the classroom for learning physics allow students to measure and display variables in real time. The main objective of these probes in education is to join science, technology, engineering, and mathematics (STEM), aiming to improve student learning. This research presents the optical and mechanical design, as well as the control algorithm, of a probe used for learning the concept of light transmittance. The probe consists of a single beam spectrophotometer and a digital camera connected to a computer. The components of the spectrophotometer were aligned and assembled into a housing manufactured with a 3D printer. The performance of the probe was evaluated by means of four standard samples used in spectroscopy, and its transmittance plots show characteristic maxima reported in the literature, which demonstrates a good performance of the probe for STEM education.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Sondas]]></kwd>
<kwd lng="es"><![CDATA[STEM]]></kwd>
<kwd lng="es"><![CDATA[óptica]]></kwd>
<kwd lng="es"><![CDATA[espectrofotometría visible]]></kwd>
<kwd lng="en"><![CDATA[Probeware]]></kwd>
<kwd lng="en"><![CDATA[STEM]]></kwd>
<kwd lng="en"><![CDATA[optics]]></kwd>
<kwd lng="en"><![CDATA[spectrophotometry]]></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[Albert]]></surname>
<given-names><![CDATA[D. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Todt]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Davis]]></surname>
<given-names><![CDATA[H. F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A low-cost quantitative absorption spectrophotometer]]></article-title>
<source><![CDATA[Journal of Chemical Education]]></source>
<year>2012</year>
<volume>89</volume>
<numero>11</numero>
<issue>11</issue>
<page-range>1432-5</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Botero-Valencia]]></surname>
<given-names><![CDATA[J. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Valencia-Aguirre]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Durmus]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Davis]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Multi-channel low-cost light spectrum measurement using a multilayer perceptron]]></article-title>
<source><![CDATA[Energy and Buildings]]></source>
<year>2019</year>
<volume>199</volume>
<page-range>579-87</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chaianantakul]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Wutthi]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Kamput]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Pramanpol]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Janphuang]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Pummara]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
<name>
<surname><![CDATA[Phimon]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Phatthanakun]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Development of mini-spectrophotometer for determination of plasma glucose]]></article-title>
<source><![CDATA[Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy]]></source>
<year>2018</year>
<volume>204</volume>
<page-range>670-6</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Davis]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
<name>
<surname><![CDATA[Ohno]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Color quality scale]]></article-title>
<source><![CDATA[Optical Engineering]]></source>
<year>2010</year>
<volume>49</volume>
<numero>3</numero>
<issue>3</issue>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Farooq]]></surname>
<given-names><![CDATA[M. U.]]></given-names>
</name>
<name>
<surname><![CDATA[Waseem]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Mazhar]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Khairi]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Kamal]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A review on internet of things (IoT)]]></article-title>
<source><![CDATA[International Journal of Computer Applications]]></source>
<year>2015</year>
<volume>113</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>1-7</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gilbert]]></surname>
<given-names><![CDATA[P. U. P. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Haeberli]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Experiments on subtractive color mixing with a spectrophotometer]]></article-title>
<source><![CDATA[American Journal of Physics]]></source>
<year>2007</year>
<volume>75</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>313-9</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gräb]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Geidel]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Spectroscopic studies of food colorings]]></article-title>
<source><![CDATA[World Journal of Chemical Education]]></source>
<year>2019</year>
<volume>7</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>136-44</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Palmer]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Loewen]]></surname>
<given-names><![CDATA[E. G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Diffraction grating handbook]]></source>
<year>2005</year>
<publisher-name><![CDATA[Newport]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pearce]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Building research equipment with free, open-source hardware]]></article-title>
<source><![CDATA[Science]]></source>
<year>2012</year>
<volume>337</volume>
<numero>6100</numero>
<issue>6100</issue>
<page-range>1303-4</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Popov]]></surname>
<given-names><![CDATA[E. K.]]></given-names>
</name>
<name>
<surname><![CDATA[Tsonev]]></surname>
<given-names><![CDATA[L. V.]]></given-names>
</name>
<name>
<surname><![CDATA[Loewen]]></surname>
<given-names><![CDATA[E. G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Scalar theory of transmission relief gratings]]></article-title>
<source><![CDATA[Optics Communications]]></source>
<year>1991</year>
<volume>80</volume>
<numero>5-6</numero>
<issue>5-6</issue>
<page-range>307-11</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Shapovalov]]></surname>
<given-names><![CDATA[Y. B.]]></given-names>
</name>
<name>
<surname><![CDATA[Bilyk]]></surname>
<given-names><![CDATA[Z. I.]]></given-names>
</name>
<name>
<surname><![CDATA[Usenko]]></surname>
<given-names><![CDATA[S. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Shapovalov]]></surname>
<given-names><![CDATA[V. B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Systematic analysis of digital tools to provide STEM and science education]]></article-title>
<source><![CDATA[Journal of Physics: Conference Series]]></source>
<year>2022</year>
<volume>2288</volume>
<numero>1</numero>
<issue>1</issue>
<publisher-name><![CDATA[IOP Publishing]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Thomasson]]></surname>
<given-names><![CDATA[K. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Lofthus-Herschman]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Humbert]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Kulevsky]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Applying statistics in the undergraduate chemistry laboratory: experiments with food dyes]]></article-title>
<source><![CDATA[Journal of Chemical Education]]></source>
<year>1998</year>
<volume>75</volume>
<numero>2</numero>
<issue>2</issue>
</nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vernon]]></surname>
<given-names><![CDATA[L. P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Spectrophotometric determination of chlorophylls and pheophytins in plant extracts]]></article-title>
<source><![CDATA[Analytical Chemistry]]></source>
<year>1960</year>
<volume>32</volume>
<numero>9</numero>
<issue>9</issue>
<page-range>1144-50</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wenzel]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Open hardware: From DIY trend to global transformation in access to laboratory equipment]]></article-title>
<source><![CDATA[PLoS Biology]]></source>
<year>2023</year>
<volume>21</volume>
<numero>1</numero>
<issue>1</issue>
</nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wilson]]></surname>
<given-names><![CDATA[M. V.]]></given-names>
</name>
<name>
<surname><![CDATA[Wilson]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Authentic performance in the instrumental analysis laboratory: Building a visible spectrophotometer prototype]]></article-title>
<source><![CDATA[Journal of Chemical Education]]></source>
<year>2017</year>
<volume>94</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>44-51</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Yan]]></surname>
<given-names><![CDATA[J. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Ren]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Ren]]></surname>
<given-names><![CDATA[L. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Jian]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Yang]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Yang]]></surname>
<given-names><![CDATA[S. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Ren]]></surname>
<given-names><![CDATA[T. L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Development of a portable setup using a miniaturized and high precision colorimeter for the estimation of phosphate in natural water]]></article-title>
<source><![CDATA[Analytica Chimica Acta]]></source>
<year>2019</year>
<volume>1058</volume>
<page-range>70-9</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Yanchapanta-Bastidas]]></surname>
<given-names><![CDATA[V. N.]]></given-names>
</name>
<name>
<surname><![CDATA[Ormaza-Hugo]]></surname>
<given-names><![CDATA[R. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Sáez-Paguay]]></surname>
<given-names><![CDATA[M. Á.]]></given-names>
</name>
<name>
<surname><![CDATA[Pachacama-Choca]]></surname>
<given-names><![CDATA[R. W.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Construcción de un espectrómetro casero para el análisis de espectros de luz, mediante el software Spectral Workbench]]></article-title>
<source><![CDATA[Polo del Conocimiento: Revista científico-profesional]]></source>
<year>2020</year>
<volume>5</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>209-22</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
