Concentrated Extracts of Croton oblongifolius Roxb. and Thunbergia laurifolia Lindl. by Microwave Technique as an Ingredients in Herbal Products
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Abstract
Cosmeceutical products incorporated with herbal extract are highly required nowadays. However, the extraction methods of concentrated herbal extracts are quite complicated and high cost. The research aimed to develop a mixture of concentrated extracts from two local herbs, Croton oblongifolius Roxb. and Thunbergia laurifolia Lindl. The leaves of both plants were extracted in water with microwave irradiation of varying electric powers and times. The results showed the optimum extraction condition of 100 W, 5 min, 1 time for Croton oblongifolius Roxb. with 4.80% yield of extract, and 300 W, 1 min, 5 times for Thunbergia laurifolia Lindl. with 5.46% yield of extract. Based on the contents of phenolic compounds and the preliminary test on ability to inhibit Staphylococcus aureus bacteria, it was found that the appropriate proportion of Croton oblongifolius Roxb. : Thunbergia laurifolia Lindl. was 1:2 (by weight) with 33.5 mg GAE/g DW of total phenolic compounds and 9.83 mm diameter of inhibition zone on S. aureus. This proportion of the two extracts was then used in soap and lotion formulations. Regarding the satisfaction, both developed products received ‘like very much’ to ‘like most’ level after the home-used test for 1 week. This research pointed out that the microwave-assisted extraction method is appropriated in producing herbal products for villagers or community enterprises. However, ensuring the standard quality in accordance with the herbal products is recommended.
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บทความ ข้อมูล เนื้อหา รูปภาพ ฯลฯ ที่ได้รับการเผยแพร่ในวารสารวิทยาศาสตร์และเทคโนโลยี มรย. นี้ ถือเป็นลิขสิทธิ์ของวารสารวิทยาศาสตร์และเทคโนโลยี มรย. หากบุคคลหรือหน่วยงานใดต้องการนำทั้งหมดหรือส่วนหนึ่งส่วนใดไปเผยแพร่ต่อหรือกระทำการใดๆ จะต้องได้รับอนุญาตเป็นลายลักษณ์อักษรจากวารสารวิทยาศาสตร์และเทคโนโลยี มรย. ก่อนเท่านั้น
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