<?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>2304-0106</journal-id>
<journal-title><![CDATA[Anales de la Academia de Ciencias de Cuba]]></journal-title>
<abbrev-journal-title><![CDATA[Anales de la ACC]]></abbrev-journal-title>
<issn>2304-0106</issn>
<publisher>
<publisher-name><![CDATA[Academia de Ciencias de Cuba]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2304-01062022000300011</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Diseño de bobinas de excitación-recepción para la detección de señales de RMN 19F proveniente del compuesto politetrafluoetileno/óxido de grafeno]]></article-title>
<article-title xml:lang="en"><![CDATA[Design of excitation-reception coils for the detection of 19F NMR signals from the polytetrafluoroethylene/graphene oxide composite]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García Bello]]></surname>
<given-names><![CDATA[José Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bordelois Cayamo]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[León Montoya]]></surname>
<given-names><![CDATA[José]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lores Guevara]]></surname>
<given-names><![CDATA[Manuel Arsenio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García Naranjo]]></surname>
<given-names><![CDATA[Juan Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bergues Cabrales]]></surname>
<given-names><![CDATA[Luis Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Santo Domingo  ]]></institution>
<addr-line><![CDATA[ Santo Domingo]]></addr-line>
<country>República Dominicana</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Oriente Centro de Biofísica Médica ]]></institution>
<addr-line><![CDATA[ Santiago de Cuba]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Oriente Facultad de Ingeniería Eléctrica ]]></institution>
<addr-line><![CDATA[ Santiago de Cuba]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de Oriente Centro Nacional de Electromagnetismo Aplicado ]]></institution>
<addr-line><![CDATA[ Santiago de Cuba]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<volume>12</volume>
<numero>3</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2304-01062022000300011&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2304-01062022000300011&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2304-01062022000300011&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción.  La excitación de cualquier muestra con un campo de radiofrecuencia y la recepción de la señal proveniente de esta son de vital importancia para su caracterización cuando se usan las diferentes técnicas de resonancia magnética nuclear (relajación, imágenes y espectroscopia). El objetivo de este estudio es diseñar una bobina de excitación-recepción para la detección de señales de resonancia magnética nuclear de flúor-19 proveniente del compuesto politetrafluoetileno/óxido de grafeno cuando se usa la relajación magnética nuclear.  Métodos.  La inducción magnética se calcula en el interior de cada bobina. Las simulaciones de sus respectivos mapas de campos magnéticos axiales y radiales se muestran. Además, se calculan la resistencia eléctrica, la inductancia magnética, la sensibilidad y el factor de calidad para cada bobina.  Resultados.  Los resultados muestran que la primera variante de bobina induce la mayor homogeneidad del campo magnético de radiofrecuencia en el volumen de trabajo, los menores valores de la inductancia magnética, la resistencia eléctrica y la inducción magnética de la bobina y los valores más adecuados del factor de calidad y la sensibilidad. Se concluye que la primera variante de bobina excitación-recepción es la más adecuada para el estudio del compuesto politetrafluoetileno/óxido de grafeno caracterizado por relajación magnética de flúor-19.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction. The excitation of any sample with a radiofrequency field and the reception of the signal coming from it are of vital importance for its characterization when different techniques of Nuclear Magnetic Resonance (Relaxation, Images and Spectroscopy) are used. The aim of this study is to design an excitation-reception coil for the detection of fluorine-19 Nuclear Magnetic Resonance signals from the polytetrafluoroethylene/graphene oxide composite when nuclear magnetic relaxation is used.  Methods. The magnetic induction is calculated inside each coil. Simulations of their respective maps of axial and radial magnetic fields are shown. In addition, the electrical resistance, the magnetic inductance, the sensitivity and the quality factor for each coil are calculated.  Results and Discussion. The results show that the first variant of coil induces the greater homogeneity of the radiofrequency magnetic field in the work volume, the lowest values of the magnetic inductance, electrical resistance and magnetic induction of the coil, and the most adequate values of the quality factor and sensitivity. It is concluded that the first variant of excitation-reception coil is the most suitable for the study of the polytetrafluoroethylene/graphene oxide composite characterized by fluorine-19 magnetic relaxation.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Relajación de resonancia magnética nuclear de flúor-19]]></kwd>
<kwd lng="es"><![CDATA[bobina de excitación-recepción]]></kwd>
<kwd lng="es"><![CDATA[compuesto politetrafluoetileno/óxido de grafeno]]></kwd>
<kwd lng="en"><![CDATA[fluorine-19 nuclear magnetic resonance relaxation]]></kwd>
<kwd lng="en"><![CDATA[excitation-reception coil]]></kwd>
<kwd lng="en"><![CDATA[polytetrafluoroethylene/graphene oxide composite]]></kwd>
</kwd-group>
</article-meta>
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