![](data:image/png;base64,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)
vi
MỤC LỤC
Trang
Lời cảm ơn ...................................................................................................................... iv
Tóm tắt ............................................................................................................................. v
Mục lục ........................................................................................................................... vi
Danh sách các chữ viết tắt .............................................................................................. ix
Danh sách các bảng ......................................................................................................... x
Danh sách các hình ......................................................................................................... xi
Phần 1: MỞ ĐẦU .......................................................................................................... 1
1.1. Đặt vấn đề ................................................................................................................. 1
1.2. Mục đích – Nội dung ................................................................................................ 2
1.2.1. Mục đích .......................................................................................................... 2
1.2.2. Nội dung ........................................................................................................... 2
Phần 2: TỔNG QUAN TÀI LIỆU ............................................................................... 3
2.1. Giới thiệu về oligoglucosamine (OG) ...................................................................... 3
2.1.1. Định nghĩa ........................................................................................................ 3
2.1.2. Ứng dụng của OG ............................................................................................ 4
2.1.2.1. Tác động đối với cơ thể thực vật ............................................................. 4
2.1.2.2. Tác động đối với cơ thể động vật ............................................................ 6
2.1.2.3. VitaStim-hỗn hợp các oligosaccharide có hoạt tính sinh học
ứng dụng trong nuôi tôm và cá ................................................................ 7
2.1.2.4. Ứng dụng của OG trong lĩnh vực y học .................................................. 7
2.2. Giới thiệu về -glucan .............................................................................................. 8
2.2.1. Cấu trúc của -glucan ...................................................................................... 8
2.2.2. Tính chất của -glucan ..................................................................................... 9
2.2.3. Cơ chế tác động của -glucan .......................................................................... 9
2.2.3.1. Cơ chế tăng cường hệ miễn dịch ............................................................. 9
2.2.3.2. Cơ chế chống ung thư của -glucan ...................................................... 11
2.2.4. Tác dụng của -glucan đối với sinh vật ......................................................... 11