13C-n.m.r Magnetic Resonance Spectroscopy 4 Support, Non-U.S. Gov't 4 article 4 carbon nuclear magnetic resonance 4 chemical bond 4 chemical structure 4 Carbohydrate Conformation 2 Carbohydrate Sequence 2 Carbon Isotopes 2 Carrageenan 2 Comparative Study 2 Hydrolysis 2 Molecular Sequence Data 2 Molecular Structure 2 Optical Rotation 2 Seaweed 2 Temperature 2 Xylans 2 autohydrolysis 2 carbon 2 carrageenan 2 chemical reaction 2 chemistry 2 comparative study 2 conformation 2 diad frequencies 2 hydrolysis 2 isolation and purification 2 methodology 2