KHẢO SÁT KHẢ NĂNG KHÁNG OXY HÓA CỦA CHẤT MÀU ANTHOCYANIN TRONG NHỮNG ĐIỀU KIỆN pH KHÁC NHAU

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https://twitter.com/daykemquynhon plus.google.com/+DạyKèmQuyNhơn www.facebook.com/daykem.quynhon https://daykemquynhon.blogspot.com http://daykemquynhon.ucoz.com Nơi bồi dưỡng kiến thức Toán - Lý - Hóa cho học sinh cấp 2+3 / Diễn Đàn Toán - Lý - Hóa Quy Nhơn 1000B Trần Hưng Đạo Tp.Quy Nhơn Tỉnh Bình Định ABSTRACT In this thesis, properties and antioxidant capacity of colorant extracts from black beans were investigated in change of preparing and storing conditions. Anthocyanin colorants were studied by using parameters such as pH-differential method, indices for pigment degradation polymeric color and browning, color measurement method byCIE system and the antioxidant property was evaluated by using reaction with DPPH . Shells of blackbeans were peeled off after soaked in solution for 4 hrs and then extracted color by using water with ratio of 1/6 (g/ml) at temperature of 60°C for 45 minutes to collect a red extract. Soaking black beans in 1% citric acid could preserve anthocyanin and increase concentration of it in the liquid extract. The anthocyanin concentration of extracts by soaking in water and 1% citric acid was 92 mg/l and 166 mg/l, respectively. Antioxidant capacity was quite similar and over 90%. Lowering pH of the liquid extracts led to changing hue of colorant (brown red to red) and pH4 was suitable condition. Changing pH did not affect to antioxidant capacity. Colorant powder obtained from extracts after removing solvent was dark purple. After one month storage at low temperature and no-light, the amount of anthocyanin was reduced and denatured. Particularly, the antioxidant activity of the pigment was remained over time in storage. Hopefully, the result of this thesis will open a new direction for using the extracted powder from natural materials in food industry. DIỄN ĐÀN TOÁN - LÝ - HÓA 1000B TRẦN HƯNG ĐẠO TP.QUY NHƠN MỌI YÊU CẦU GỬI VỀ HỘP MAIL DAYKEMQUYNHONBUSINESS@GMAIL.COM HOTLINE : +84905779594 (MOBILE/ZALO) https://daykemquynhonofficial.wordpress.com/blog/ DẠY KÈM QUY NHƠN OFFICIAL ST&GT : Đ/C 1000B TRẦN HƯNG ĐẠO TP.QUY NHƠN Đóng góp PDF bởi GV. Nguyễn Thanh Tú www.facebook.com/daykemquynhonofficial www.facebook.com/boiduonghoahocquynhonofficial
https://twitter.com/daykemquynhon plus.google.com/+DạyKèmQuyNhơn www.facebook.com/daykem.quynhon https://daykemquynhon.blogspot.com http://daykemquynhon.ucoz.com Nơi bồi dưỡng kiến thức Toán - Lý - Hóa cho học sinh cấp 2+3 / Diễn Đàn Toán - Lý - Hóa Quy Nhơn 1000B Trần Hưng Đạo Tp.Quy Nhơn Tỉnh Bình Định MỤC LỤC LỜI CẢM ƠN ..................................................................................................................... 1 TÓM TẮT LUẬN VĂN ..................................................................................................... ii ABSTRACT ...................................................................................................................... iv MỤC LỤC .......................................................................................................................... v DANH SÁCH HÌNH ...................................................................................................... viii DANH SÁCH BẢNG ......................................................................................................... x DANH SÁCH PHỤ LỤC .................................................................................................. xi DANH SÁCH CHỮ VIẾT TẮT ...................................................................................... xii Chương 1 ....................................................................................................................... - 1 - MỞ ĐẦU ....................................................................................................................... - 1 - 1.1.Đặt vấn đề ............................................................................................................ - 1 - 1.2.Mục đích đề tài .................................................................................................... - 2 - 1.3.Nội dung đề tài ..................................................................................................... - 2 - 1.4.Yêu cầu đề tài ...................................................................................................... - 3 - Chương 2 ....................................................................................................................... - 4 - TỔNG QUAN................................................................................................................ - 4 - 2.1. Đậu đen ............................................................................................................... - 4 - 2.1.1. Tên khoa học và mô tả ................................................................................. - 4 - 2.1.2. Phân bố ......................................................................................................... - 5 - 2.1.3. Thành phần dinh dưỡng ............................................................................... - 5 - 2.1.4. Vai trò của đậu đen ...................................................................................... - 9 - 2.2. Giới thiệu về flavonoid và anthocyanin ............................................................ - 12 - 2.2.1. Khái quát về flavonoid ............................................................................... - 12 - 2.2.2. Giới thiệu về anthocyanin .......................................................................... - 14 - DIỄN ĐÀN TOÁN - LÝ - HÓA 1000B TRẦN HƯNG ĐẠO TP.QUY NHƠN 2.2.2.1.Khái quát về anthocyanin ................................................................................ - 14 - 2.2.2.2.Các yếu tố ảnh hưởng đến độ bền của chất màu anthocyanin ......................... - 16 - 2.2.2.3.Hoạt tính chống oxy hóa của hợp chất anthocyanin ........................................ - 24 - MỌI YÊU CẦU GỬI VỀ HỘP MAIL DAYKEMQUYNHONBUSINESS@GMAIL.COM HOTLINE : +84905779594 (MOBILE/ZALO) https://daykemquynhonofficial.wordpress.com/blog/ DẠY KÈM QUY NHƠN OFFICIAL ST&GT : Đ/C 1000B TRẦN HƯNG ĐẠO TP.QUY NHƠN Đóng góp PDF bởi GV. Nguyễn Thanh Tú www.facebook.com/daykemquynhonofficial www.facebook.com/boiduonghoahocquynhonofficial
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KHẢO SÁT KHẢ NĂNG KHÁNG OXY HÓA CỦA CHẤT MÀU ANTHOCYANIN TRONG NHỮNG ĐIỀU KIỆN pH KHÁC NHAU

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