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      <title>Línea del Tiempo de la Historia de la Nutrición by RODRIGO SALINAS MARTINEZ</title>
      <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao</link>
      <description>Bases de nutrición: macronutrientes</description>
      <language>en-us</language>
      <pubDate>2025-09-01 23:45:53 UTC</pubDate>
      <lastBuildDate>2025-09-02 01:48:51 UTC</lastBuildDate>
      <webMaster>hello@padlet.com</webMaster>
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      <item>
         <title>&lt;x</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563766112</link>
         <description><![CDATA[]]></description>
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         <pubDate>2025-09-01 23:45:53 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563766112</guid>
      </item>
      <item>
         <title>Línea del Tiempo de la Historia de la Nutrición
</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563867649</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/ae919a63e86c6d16667779469d58a5d1/1.jpg" />
         <pubDate>2025-09-02 00:50:10 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563867649</guid>
      </item>
      <item>
         <title>1769</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563869069</link>
         <description><![CDATA[<p>François Poulletier de la Salle (francés) identifica colesterol en cálculos biliares.</p>]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/37f9071e803c44a0f3aeb9bcf0085995/2.jpg" />
         <pubDate>2025-09-02 00:51:01 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563869069</guid>
      </item>
      <item>
         <title>1774</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563878636</link>
         <description><![CDATA[<p>Antoine-Laurent Lavoisier (francés) cuestiona el flogisto y sienta bases de la oxidación con <em>Opuscules physiques et chimiques</em>.</p>]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/3430dc8573361a79833d635530b8077d/3.jpg" />
         <pubDate>2025-09-02 00:56:16 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563878636</guid>
      </item>
      <item>
         <title>1777</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563879069</link>
         <description><![CDATA[<p>Lavoisier (francés) presenta a la Academia Real de Ciencias su trabajo sobre la respiración animal, concluyendo la analogía entre combustión y respiración.</p>]]></description>
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         <pubDate>2025-09-02 00:56:30 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563879069</guid>
      </item>
      <item>
         <title>1780</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563879726</link>
         <description><![CDATA[<p>Lavoisier y Pierre-Simon de Laplace (francés) construyen el primer calorímetro de hielo y relacionan oxidación con producción de calor en seres vivos.</p>]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/a3743b1c23bf5f863037fc8c71955e6c/5.webp" />
         <pubDate>2025-09-02 00:56:54 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563879726</guid>
      </item>
      <item>
         <title>1783 (28 de junio)</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563881800</link>
         <description><![CDATA[<p>Lavoisier y Laplace presentan la <em>Memoria sobre el calor</em>, integrando combustión, oxidación y respiración.</p>]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/8177d2e6802d4c986dbc68a63d1fb466/6.jpg" />
         <pubDate>2025-09-02 00:57:46 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563881800</guid>
      </item>
      <item>
         <title>1799</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563885112</link>
         <description><![CDATA[<p>William Cruickshank (escocés) estudia la composición elemental del azúcar de caña.</p>]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/d983026c3be0e17e11b32b83066fd880/7.jpg" />
         <pubDate>2025-09-02 00:59:27 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563885112</guid>
      </item>
      <item>
         <title>1802</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563893450</link>
         <description><![CDATA[<p>Valentin Rose (alemán) describe la inulina.</p>]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/38ee3ba7a90c5b6eee395faaf77ae752/8.png" />
         <pubDate>2025-09-02 01:04:18 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563893450</guid>
      </item>
      <item>
         <title>1813</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563894150</link>
         <description><![CDATA[<p>Michel-Eugène Chevreul (francés) aísla glicerina y describe ácidos grasos (oleico, esteárico).</p>]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/1725c7ea13fadfc41ffd13e1080d1c61/9.jpg" />
         <pubDate>2025-09-02 01:04:41 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563894150</guid>
      </item>
      <item>
         <title>1815</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563895132</link>
         <description><![CDATA[<p>Chevreul (francés) aísla un azúcar urinario en diabetes (glucosa) y redescubre el colesterol (colesterina).</p>]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/e1bd34039b7a8f7131542ac6298000e6/10.jpg" />
         <pubDate>2025-09-02 01:05:14 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563895132</guid>
      </item>
      <item>
         <title>1820</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563895567</link>
         <description><![CDATA[<p>Henri Braconnot (francés) obtiene glicina y leucina por hidrólisis de gelatina.</p>]]></description>
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         <pubDate>2025-09-02 01:05:30 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563895567</guid>
      </item>
      <item>
         <title>1825</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563896240</link>
         <description><![CDATA[<p>François-Vincent Raspail (francés) caracteriza microscópicamente el almidón.</p>]]></description>
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         <pubDate>2025-09-02 01:05:45 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563896240</guid>
      </item>
      <item>
         <title>1827</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563898529</link>
         <description><![CDATA[<p>William Prout (inglés) clasifica los alimentos en “sacarinosos”, “oleosos” y “albuminosos”.</p>]]></description>
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         <pubDate>2025-09-02 01:07:02 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563898529</guid>
      </item>
      <item>
         <title>1833</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563898880</link>
         <description><![CDATA[<p>Anselme Payen (francés) y Jean-François Persoz (francés/suizo) aíslan la “diastasa” (amilasa) de malta.</p>]]></description>
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         <pubDate>2025-09-02 01:07:15 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563898880</guid>
      </item>
      <item>
         <title>1834</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563899344</link>
         <description><![CDATA[<p>Julius Fritzsche (alemán) describe la estructura de los gránulos de almidón.</p>]]></description>
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         <pubDate>2025-09-02 01:07:31 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563899344</guid>
      </item>
      <item>
         <title>1839</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563900433</link>
         <description><![CDATA[<p>Gerrit Jan Mulder (neerlandés) introduce el término “proteína”; Jöns Jacob Berzelius (sueco) sugiere el nombre.</p>]]></description>
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         <pubDate>2025-09-02 01:07:52 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563900433</guid>
      </item>
      <item>
         <title>1844</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563900858</link>
         <description><![CDATA[<p>Carl Schmidt (alemán) acuña el término “Kohlenhydrate” (carbohidratos).</p>]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/b627c84bcaf7dedfe235b7e3620738fa/17.jpeg" />
         <pubDate>2025-09-02 01:08:06 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563900858</guid>
      </item>
      <item>
         <title>1877</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563902130</link>
         <description><![CDATA[<p>Claude Bernard (francés) descubre el glucógeno hepático y muscular.</p>]]></description>
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         <pubDate>2025-09-02 01:08:48 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563902130</guid>
      </item>
      <item>
         <title>1912</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563902740</link>
         <description><![CDATA[<p>Casimir Funk (polaco) propone la etiología carencial y acuña el término “vitamina” al descubrir la tiamina (B1).</p>]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/afc5ac2cb1e3482a428c45ae992980af/19.jpeg" />
         <pubDate>2025-09-02 01:09:05 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563902740</guid>
      </item>
      <item>
         <title>1913</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563903270</link>
         <description><![CDATA[<p>Elmer V. McCollum (estadounidense) demuestra la existencia de “lipinas” esenciales (vitamina A).</p>]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/acac863b1705922442288883fedc8bd6/20.jpeg" />
         <pubDate>2025-09-02 01:09:21 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563903270</guid>
      </item>
      <item>
         <title>1916</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563903793</link>
         <description><![CDATA[<p>McCollum y Marguerite Davis/Kennedy (estadounidenses) diferencian factores solubles en grasa (A) y en agua/alcohol (B).</p>]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/05ca60f46f401d9a0dba632f55c2eec7/21.jpeg" />
         <pubDate>2025-09-02 01:09:37 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563903793</guid>
      </item>
      <item>
         <title>1917</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563904490</link>
         <description><![CDATA[<p>David John Davis (estadounidense) reconoce las vitaminas como esenciales en humanos; McCollum (estadounidense) propone los grupos de vitaminas A y B.</p>]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/55e0518f4700c37d5fb824b527311e9d/22.jpeg" />
         <pubDate>2025-09-02 01:09:59 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563904490</guid>
      </item>
      <item>
         <title>1919</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563905256</link>
         <description><![CDATA[<p>Edward Mellanby (británico) vincula dieta con raquitismo y vitamina D.</p>]]></description>
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         <pubDate>2025-09-02 01:10:24 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563905256</guid>
      </item>
      <item>
         <title>1922</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563905649</link>
         <description><![CDATA[<p>McCollum (estadounidense) demuestra que la vitamina D favorece la calcificación.</p>]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/df5276ff3e727a244695a973eba860d9/24.png" />
         <pubDate>2025-09-02 01:10:39 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563905649</guid>
      </item>
      <item>
         <title>1922-1924</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563906291</link>
         <description><![CDATA[<p>Herbert M. Evans y Katharine S. Bishop (estadounidenses) describen la vitamina E como factor esencial para la reproducción; Barnett Sure (estadounidense) la nombra en 1924.</p>]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/559d61c1df7f7042e4b4bf54e2144182/25.jpg" />
         <pubDate>2025-09-02 01:11:01 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563906291</guid>
      </item>
      <item>
         <title>1928-1932</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563906833</link>
         <description><![CDATA[<p>Albert Szent-Györgyi (húngaro) describe el “factor reductor” (1928) y Charles Glen King (estadounidense) aísla el ácido ascórbico o vitamina C (1932).</p>]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/eb80fb3912e7682d6b102b9d775bf9cd/26.jpg" />
         <pubDate>2025-09-02 01:11:17 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563906833</guid>
      </item>
      <item>
         <title>1933</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563907276</link>
         <description><![CDATA[<p>Richard Kuhn (austríaco) aísla riboflavina (B2).</p>]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/5b81b0cf40d080ec54041b7fa387911a/27.jpeg" />
         <pubDate>2025-09-02 01:11:29 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563907276</guid>
      </item>
      <item>
         <title>1933</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563907911</link>
         <description><![CDATA[<p>Roger J. Williams (estadounidense) descubre el ácido pantoténico (B5).</p>]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/2bc598e59fdab571225504337fd4bd1b/28.jpeg" />
         <pubDate>2025-09-02 01:11:43 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563907911</guid>
      </item>
      <item>
         <title>1934</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563908328</link>
         <description><![CDATA[<p>Paul György (húngaro) identifica la piridoxina (B6).</p>]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/21e6af5344ef85a36858cf1616638ea1/29.png" />
         <pubDate>2025-09-02 01:11:55 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563908328</guid>
      </item>
      <item>
         <title>1934-1935</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563909877</link>
         <description><![CDATA[<p>Henrik Dam (danés) descubre la vitamina K como factor antihemorrágico.</p>]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/e80c7e6125c70aeae2687730891783c7/30.jpeg" />
         <pubDate>2025-09-02 01:12:10 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563909877</guid>
      </item>
      <item>
         <title>1936-1940</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563910881</link>
         <description><![CDATA[<p>Fritz Kögl (austríaco) cristaliza biotina (B8); Paul György (húngaro) confirma su papel como vitamina H/coenzima R.</p>]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/934a8a56382e5be7ff9e5ea9ea6554ac/31.jpeg" />
         <pubDate>2025-09-02 01:12:42 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563910881</guid>
      </item>
      <item>
         <title>1937</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563911347</link>
         <description><![CDATA[<p>Conrad A. Elvehjem (estadounidense) aísla la niacina (B3) como factor antipelagra.</p>]]></description>
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         <pubDate>2025-09-02 01:12:57 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563911347</guid>
      </item>
      <item>
         <title>1941</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563911755</link>
         <description><![CDATA[<p>Herschel K. Mitchell (estadounidense) concentra ácido fólico (B9) de espinacas.</p>]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/43d6fa8f3797cc8863ff883cff59c5e6/33.jpeg" />
         <pubDate>2025-09-02 01:13:10 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563911755</guid>
      </item>
      <item>
         <title>1947-1948</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563912728</link>
         <description><![CDATA[<p>Mary Shorb (estadounidense) demuestra la importancia de un factor de crecimiento (B12) para <em>Lactobacillus</em>; Edward L. Rickes (estadounidense) aísla vitamina B12 cristalina (1948).</p>]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/4d092f2cc81f555496cfdf8fe01f18e7/34.jpeg" />
         <pubDate>2025-09-02 01:13:39 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563912728</guid>
      </item>
      <item>
         <title>1935</title>
         <author>rodrigosalinasmr</author>
         <link>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563913964</link>
         <description><![CDATA[<p>William C. Rose (estadounidense) completa el descubrimiento de los aminoácidos esenciales.</p>]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/4265185898/ace14afd1ee04801a3cf83d80d3c5f06/36.jpeg" />
         <pubDate>2025-09-02 01:14:14 UTC</pubDate>
         <guid>https://padlet.com/rodrigosalinasmr/3gu6stxwn9yks9ao/wish/3563913964</guid>
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