<?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%">Suthira Maneechai</style></author><author><style face="normal" font="default" size="100%">Vachiraporn Pikulthong</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Total Phenolic Contents and Free Radical Scavenging Activity of Guaiacum officinale L. Extracts</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%">Ethanolic twig extracts</style></keyword><keyword><style  face="normal" font="default" size="100%">Ethyl acetate twig extracts.</style></keyword><keyword><style  face="normal" font="default" size="100%">Free Radical Scavenging Activity</style></keyword><keyword><style  face="normal" font="default" size="100%">Guaiacum Officinale L</style></keyword><keyword><style  face="normal" font="default" size="100%">Total Phenolic Contents</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2017</style></year><pub-dates><date><style  face="normal" font="default" size="100%">September 2017</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://fulltxt.org/article/198</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">9</style></volume><pages><style face="normal" font="default" size="100%">929-931</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;strong&gt;Backgound:&lt;/strong&gt; &lt;em&gt;Guaiacum officinale&lt;/em&gt; L. is an alien species to Thailand. It is used as anti-arthritis and anti-rheumatoid agents in Indian folklore medicine. &lt;strong&gt;Objective:&lt;/strong&gt; The present study was aimed to investigate total phenolic contents and free radical scavenging activity of the extracts from &lt;em&gt;Guaiacum officinale&lt;/em&gt; L. (Zygophyllaceae). &lt;strong&gt;Methods:&lt;/strong&gt; The plant parts including bark, twig and leaf were extracted using different solvents (ethyl acetate, water and ethanol). Total phenolic contents were determined by Folin-Ciocalteu Colorimetry method while free radical scavenging activity of the extracts was investigated by 2, 2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity assay. &lt;strong&gt;Results:&lt;/strong&gt; The results show that the highest total phenolic content is found in the ethyl acetate twig extracts (20.3&amp;plusmn;0.0031 &amp;mu;g GAE/1 &amp;mu;g extracts). The ethanolic twig extracts had the highest free radical scavenging activity with IC50 of 0.45&amp;plusmn;0.0188 mg/ml. &lt;strong&gt;Conclusion:&lt;/strong&gt; The extracts from &lt;em&gt;Guaiacum officinale&lt;/em&gt; L. exhibit good anti-oxidant activity and may be suitable for development as drugs and supplementary food.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">6</style></issue><work-type><style face="normal" font="default" size="100%">Original Article</style></work-type><section><style face="normal" font="default" size="100%">929</style></section><auth-address><style face="normal" font="default" size="100%">&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;strong&gt;Suthira Maneechai&lt;sup&gt;1&lt;/sup&gt; and Vachiraporn Pikulthong&lt;sup&gt;2*&lt;/sup&gt; &lt;/strong&gt;&lt;/p&gt;
&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;sup&gt;1&lt;/sup&gt;Department of Biology, Faculty of Science, Mahasarakham University, THAILAND.&lt;/p&gt;
&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;sup&gt;2&lt;/sup&gt;Division of Biology, Department of Science, Faculty of Science and Technology, Suan Sunandha Rajabhat University, THAILAND.&lt;/p&gt;</style></auth-address></record></records></xml>