<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Paul Alan Arkin Alvarado-García</style></author><author><style face="normal" font="default" size="100%">Marilú Roxana Soto-Vásquez</style></author><author><style face="normal" font="default" size="100%">Francisco Mercedes Infantes Gomez</style></author><author><style face="normal" font="default" size="100%">Natalia Mavila Guzmán Rodríguez</style></author><author><style face="normal" font="default" size="100%">Yolanda Elizabeth Rodríguez de Guzmán</style></author><author><style face="normal" font="default" size="100%">Demetrio Rafael Jara-Aguilar</style></author><author><style face="normal" font="default" size="100%">Roger Antonio Rengifo-Penadillos</style></author><author><style face="normal" font="default" size="100%">José Gilberto Gavidia-Valencia</style></author><author><style face="normal" font="default" size="100%">Iris Melina Alfaro-Beltrán</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Effects of Melissa officinalis essential oil on state and trait anxiety</style></title><secondary-title><style face="normal" font="default" size="100%">Pharmacognosy Journal</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Essential oil</style></keyword><keyword><style  face="normal" font="default" size="100%">Melissa officinalis.</style></keyword><keyword><style  face="normal" font="default" size="100%">State anxiety</style></keyword><keyword><style  face="normal" font="default" size="100%">Trait anxiety</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2023</style></year><pub-dates><date><style  face="normal" font="default" size="100%">June 2023</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">15</style></volume><pages><style face="normal" font="default" size="100%">454-460</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p class=&quot;rtejustify&quot;&gt;&lt;strong&gt;Introduction:&lt;/strong&gt; Essential oils are complex substances used extensively in aromatherapy and phytotherapy, some of them as anxiety and stress-relieving agents. In order to evaluate the effects of &lt;em&gt;Melissa officinalis&lt;/em&gt; essential oil on state and trait anxiety, this study was conducted. &lt;strong&gt;Methods: &lt;/strong&gt;The essential oil was extracted by steam distillation and the chemical composition was investigated by Gas chromatographymass spectrometry (GC–MS). In addition, a Quasi experimental study with measures at pretest-posttest was conducted, where 58 participants were divided into two groups, a waiting-list (WL) control group, and an experimental group (EG)treated with aromatherapy based on &lt;em&gt;Melissa officinalis&lt;/em&gt; essential oil. The anxiety index was evaluated by State-Trait Anxiety Inventory (STAI). Measures were taken at two times: pretest and posttest. &lt;strong&gt;Results&lt;/strong&gt;: The chemical analysis showed that β-cubebene (26.3%), β-caryophyllene (25.4%) and geranial (12.5%) were de main components. Both state and trait anxiety levels decreased in the experimental group during the posttest phase; however, only state anxiety demonstrated statistically significant differences (p&amp;lt;0.05). A moderate size effect was found for state anxiety (d = 0.799; g= 0.797) with 1-β=0.803; but none for trait anxiety. &lt;strong&gt;Conclusion:&lt;/strong&gt; &lt;em&gt;Melissa officinalis&lt;/em&gt; essential oil was moderately effective on state anxiety but has no effect on trait anxiety.&lt;/p&gt;
</style></abstract><issue><style face="normal" font="default" size="100%">3</style></issue><work-type><style face="normal" font="default" size="100%">Research Article</style></work-type><section><style face="normal" font="default" size="100%">454</style></section><auth-address><style face="normal" font="default" size="100%">&lt;p class=&quot;rtejustify&quot;&gt;&lt;strong&gt;Paul Alan Arkin Alvarado- García&lt;sup&gt;1,*&lt;/sup&gt;, Marilú Roxana Soto- Vásquez&lt;sup&gt;2&lt;/sup&gt;, Francisco Mercedes Infantes Gomez&lt;sup&gt;1&lt;/sup&gt;, Natalia Mavila Guzmán Rodríguez&lt;sup&gt;3&lt;/sup&gt;, Yolanda Elizabeth Rodríguez de Guzmán&lt;sup&gt;4&lt;/sup&gt;, Demetrio Rafael Jara- Aguilar&lt;sup&gt;2&lt;/sup&gt;, Roger Antonio Rengifo- Penadillos&lt;sup&gt;2&lt;/sup&gt;, José Gilberto Gavidia-Valencia&lt;sup&gt;2&lt;/sup&gt;, Iris Melina Alfaro-Beltrán&lt;sup&gt;5&lt;/sup&gt;&lt;/strong&gt;&lt;/p&gt;

&lt;p class=&quot;rtejustify&quot;&gt;&lt;sup&gt;1&lt;/sup&gt;Escuela de Medicina. Universidad César Vallejo, Trujillo, PERÚ.&lt;/p&gt;

&lt;p class=&quot;rtejustify&quot;&gt;&lt;sup&gt;2&lt;/sup&gt;Facultad de Farmacia y Bioquímica. Universidad Nacional de Trujillo, Trujillo, PERÚ.&lt;/p&gt;

&lt;p class=&quot;rtejustify&quot;&gt;&lt;sup&gt;3&lt;/sup&gt;Escuela de Psicología. Universidad César Vallejo, Trujillo, PERÚ.&lt;/p&gt;

&lt;p class=&quot;rtejustify&quot;&gt;&lt;sup&gt;4&lt;/sup&gt;Facultad de Enfermería. Universidad Nacional de Trujillo, Trujillo, PERÚ.&lt;/p&gt;

&lt;p class=&quot;rtejustify&quot;&gt;&lt;sup&gt;5&lt;/sup&gt;Instituto Pablo Casals, Trujillo, PERÚ.&lt;/p&gt;
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