<?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%">Candra Irawan</style></author><author><style face="normal" font="default" size="100%">Berna Elya</style></author><author><style face="normal" font="default" size="100%">Muhammad Hanafi</style></author><author><style face="normal" font="default" size="100%">Fadlina Chany Saputri</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Application of Ultrasound-Assisted Extraction on the Stem Bark of Rhinachantus Nasutus (L.) Kurz, Total Phenolic, and Its Potential as Antioxidant and Inhibitor of Alpha-Glucosidase Enzyme Activity</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%">Alpha-glucosidase enzyme</style></keyword><keyword><style  face="normal" font="default" size="100%">Antidiabetic</style></keyword><keyword><style  face="normal" font="default" size="100%">Antioxidant</style></keyword><keyword><style  face="normal" font="default" size="100%">Rhinachantus nasutus (L.) Kurz</style></keyword><keyword><style  face="normal" font="default" size="100%">Total phenolics content</style></keyword><keyword><style  face="normal" font="default" size="100%">Ultrasound-assisted extraction</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2021</style></year><pub-dates><date><style  face="normal" font="default" size="100%">September 2021</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">13</style></volume><pages><style face="normal" font="default" size="100%">1297-1303</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;Aims: &lt;/strong&gt;This study aims to obtain a stem bark extract of &lt;em&gt;Rhinachantus nasutus&lt;/em&gt; (L.) Kurz through the application of ultrasound-assisted extraction (UAE) and reveal: the total phenolic content in the extract; The extract's potential as an antioxidant with copper-reducing strength parameters, and its potential as an antidiabetic by inhibiting alpha-glucosidase activity. &lt;strong&gt;Results:&lt;/strong&gt; The crude ethanol extract of R. nasutus stem bark obtained from the UAE process was 7.4896 g with a yield of 4.99%. The high total phenolic content, namely 677.3343±0.0007 mg GAE / g sample, the antioxidant activity test using the CUPRAC method gave an IC&lt;sub&gt;50 &lt;/sub&gt;value of 18.43±0.20 mg / L. In addition, the ethanol extract of stem bark has a high ability to inhibit the activity of the alpha-glucosidase enzyme with an IC&lt;sub&gt;50&lt;/sub&gt; value of 10.95±0.28 mg / L. &lt;strong&gt;Conclusion:&lt;/strong&gt; The ethanol extract of the stem bark of R. nasutus from UAE has the potential as a source of antioxidants and antidiabetic.&lt;/p&gt;
</style></abstract><issue><style face="normal" font="default" size="100%">5</style></issue><work-type><style face="normal" font="default" size="100%">Research Article</style></work-type><section><style face="normal" font="default" size="100%">1297</style></section><auth-address><style face="normal" font="default" size="100%">&lt;p class=&quot;rtejustify&quot;&gt;&lt;strong&gt;Candra Irawan&lt;sup&gt;1,2&lt;/sup&gt;, Berna Elya&lt;sup&gt;1,&lt;/sup&gt;*, Muhammad Hanafi&lt;sup&gt;3&lt;/sup&gt;, Fadlina Chany Saputri&lt;sup&gt;1&lt;/sup&gt;&lt;/strong&gt;&lt;/p&gt;

&lt;p class=&quot;rtejustify&quot;&gt;&lt;sup&gt;1&lt;/sup&gt;Faculty of Pharmacy Universitas Indonesia, Depok 16424, West Java, INDONESIA.&lt;/p&gt;

&lt;p class=&quot;rtejustify&quot;&gt;&lt;sup&gt;2&lt;/sup&gt;Department of Analytical Chemistry; Politeknik AKA Bogor; Bogor 16154; INDONESIA.&lt;/p&gt;

&lt;p class=&quot;rtejustify&quot;&gt;&lt;sup&gt;3&lt;/sup&gt;Research Center for Chemistry, Indonesian Institute of Science, Serpong (LIPI Indonesia), INDONESIA.&lt;/p&gt;
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