<i><span style="font-family:;" "=""><span style="font-family:Verdana;">C</span><span style="font-family:Verdana;">arica papaya</span><...<i><span style="font-family:;" "=""><span style="font-family:Verdana;">C</span><span style="font-family:Verdana;">arica papaya</span></span></i><span style="font-family:Verdana;"> leaf extracts from four different extraction methods (cold-water</span><span style="font-family:Verdana;">, hot-water, sonication and supercritical fluid), were characterized using physico-chemical analysis. Sonication extraction showed the highest percentage yield of crude extracts (6.76%) and the lowest from the supercritical fluid extraction (1.83%). The Infrared (IR) spectrum of cold-water extract demonstrated the most similarity of functional group to </span><span style="font-family:Verdana;">q</span><span style="font-family:Verdana;">uercetin. Likewise, the thermal analysis indicated that cold-water extract gave a quite similar Endothermic peak to </span><span style="font-family:Verdana;">q</span><span style="font-family:Verdana;">uercetin with the obtained value</span><span style="font-family:Verdana;"> which</span><span style="font-family:Verdana;"> was 137</span><span style="font-family:Verdana;">°</span><span style="font-family:;" "=""><span style="font-family:Verdana;">C</span><span style="font-family:Verdana;"> and onset value </span></span><span style="font-family:Verdana;">which</span><span style="font-family:Verdana;"> was 118</span><span style="font-family:Verdana;">°</span><span style="font-family:;" "=""><span style="font-family:Verdana;">C</span><span style="font-family:Verdana;">. The liquid chromatography (LC) profile indicated that only the cold-water extract exhibited 0.203 ppm of </span></span><span style="font-family:Verdana;">q</span><span style="font-family:Verdana;">uercetin.</span>展开更多
文摘<i><span style="font-family:;" "=""><span style="font-family:Verdana;">C</span><span style="font-family:Verdana;">arica papaya</span></span></i><span style="font-family:Verdana;"> leaf extracts from four different extraction methods (cold-water</span><span style="font-family:Verdana;">, hot-water, sonication and supercritical fluid), were characterized using physico-chemical analysis. Sonication extraction showed the highest percentage yield of crude extracts (6.76%) and the lowest from the supercritical fluid extraction (1.83%). The Infrared (IR) spectrum of cold-water extract demonstrated the most similarity of functional group to </span><span style="font-family:Verdana;">q</span><span style="font-family:Verdana;">uercetin. Likewise, the thermal analysis indicated that cold-water extract gave a quite similar Endothermic peak to </span><span style="font-family:Verdana;">q</span><span style="font-family:Verdana;">uercetin with the obtained value</span><span style="font-family:Verdana;"> which</span><span style="font-family:Verdana;"> was 137</span><span style="font-family:Verdana;">°</span><span style="font-family:;" "=""><span style="font-family:Verdana;">C</span><span style="font-family:Verdana;"> and onset value </span></span><span style="font-family:Verdana;">which</span><span style="font-family:Verdana;"> was 118</span><span style="font-family:Verdana;">°</span><span style="font-family:;" "=""><span style="font-family:Verdana;">C</span><span style="font-family:Verdana;">. The liquid chromatography (LC) profile indicated that only the cold-water extract exhibited 0.203 ppm of </span></span><span style="font-family:Verdana;">q</span><span style="font-family:Verdana;">uercetin.</span>
