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25/3/2004 - Nguyen Hoang
Hien nay tren thi truong toi co nghe noi co mot loai thuoc co the phong duoc benh Dom Trang la Beta Glucan 1,3-1,6 va toi cung de len Web de tim thong tin ve no. Toi rat an tuong ve hoat chat nay, nhung toi muon biet them tac dung cua no tren con tom nhu the nao? neu su dung thi co anh huong gi den con tom khong? Hien nay cong ty nao dang cung cap san pham nay?
1/ Beta-glucan: la 1 loai hoat chat dac biet, co kha nang tang cuong he mien dich cua tom, ca va co kha nang tang cuong tac dung cua cac loai thuoc su dung bo sung.
Khi co bien dong moi truong, tom va ca de bi soc, luc do he mien dich trong co the tom, ca yeu lam cho mam benh de tham nhap vao co the. Luc nay Beta-glucan kich hoat he mien dich nham ngan chan su xam nhap cua virus, vi khuan...vao co the.
2/ Hien nay Beta-glucan da duoc cac cong ty san xuat thuoc va thuc an nuoi trong thuy san dua vao su dung kha nhieu; vi du nhu: trong thuc an Tomboy, cong ty Vemedim VN va cac cong ty khac dua ra cac dong san pham gom co Beta-glucan phoi tron cung mot so loai thuoc khac nham phong ngua benh tom va ca. Cac loai thuoc va thuc an co phoi tron Beta-glucan deu duoc cac nha cung ung tinh toan thanh phan va ty le thich hop de khong gay anh huong den tom ca.
16/5/2004 - Le Thanh Vu
Beta-glucan duoc nghien cuu nham ung dung trong nuoi trong thuy san dac biet la doi voi cac loai tom, chat nay co kha nang gia tang he mien dich cua tom, tang suc de khang cua tom doi voi benh tat. Hau het cac ket qua nghien cuu khoa hoc deu khang dinh rang cac loai dong vat nhom giap xac trong do co cac loai tom deu khong co he mien dich dac hieu nhu o nguoi va cac loai dong vat cap cao khac. Suc de khang voi benh tat cua tom chi thong qua he mien dich khong dac hieu (non-specific immunosystem). Vay thi beta-glucan lam tang cuong he mien dich cua tom nhu the nao? He mien dich khong dac hieu cua tom la he mien dich thong qua con duong tan cong cac nhan to gay benh bang cac te bao co kha nang tieu diet mam benh bang thuc bao (bao lay mam benh va tieu hoa chung) thuong la cac bach cau , hoac cac hoa chat co trong co the de tieu diet mam benh. Beta-glucan duoc nghien cuu co kha nang gia tang su sinh san tao cac te bao bach cau trong he tuan hoan, nen lam gia tang suc de khang cua tom.
Trong gan tuy cua tom Su (P.monodon), theo cac ket qua nghien cuu cho thay co su hien dien cua it nhat 18 loai vi khuan (trong do nhieu nhat la Vibrio harveyii- gay benh phat sang- chiem khoang 25% tong so). Cac nghien cuu gan day o Thailand cho thay khi tron beta-glucan duoc chiet tach tu vach te bao nam men (S. cerevisiae) vao khau phan an cua tom Su, co the giam nguy co benh tat cua tom, dac biet la benh do vi khuan nhu phat sang, phan trang,...
Mat khac khi tom su dung beta-glucan, nguoi ta con do duoc dao dong pH dich te bao cua tom Su trong khoang 7.0 - 7.3; dieu nay ngan chan su bung phat su sinh san cua virus gay hoi chung dom trang (WSSV).
18/4/2004 - Tangthirit - DH khoa hoc tu nhien
Beta - glucan co kha nang kich thich he mien dich cua tom, giup tom tang suc de khang voi cac loai benh, dac biet la benh do virus dom trang. De beta glucan phat huy het hieu qua can tron voi long do trung vi 2 chat nay bo sung rat tot cho nhau. Thuc te da co nhieu ho nuoi tom phong gua benh do virus dom trang thanh cong khi dung 2 loai chat tren.
16/4/2004 - ho huu han - txst
beta-glucan la mot chat tang cuong he thong mien dich cho tom, dac biet la ngan ngua ve benh gan tuy cua tom. khi tron beta-glucan vao trong vien thuc an khong nen dung dau muc nhieu vi co the lam cho beta-glucan hen che tac dung ma phai tron voi long do trung ga. cho an mot ngay mot cu de phong va tri benh gan tuy cua tom.
khi dung beta-glucan co the bo sung them men tieu hoa cho tom an (mot cu an khac trong ngay) nham giup cho tom hap thu nhanh va mau het benh.
co the tron beta-glucan voi cac khoang chat khac khi cho an.