Recently, many studies have reported that higher extraction yields could be achieved when an UAE method was adopted on many plant products, such as rutin from flower buds of Sophora japonica , oil from tobacco (Nicotiana tabacum L.) seeds , carvone and limonene from caraway seeds , polyphenols from black tea , extraction of carotenoids , pectins from grape pomace , D-pinitol from carob pods , and vanillin from vanilla pods