Antiherpetic and anticoagulant properties of carrageenans from the red seaweed Gigartina skottsbergii and their cyclized derivatives: correlation between structure and biological activity - Carlucci,M.J.; Pujol,C.A.; Ciancia,M.; Noseda,M.D.; Matulewicz,M.C.; Damonte,E.B. (Int J Biol Macromol, 1997)