Study on molecular structural characteristics of tea polysaccharide

Area of Science:

• Carbohydrate Chemistry
• Polymer Science
• Biochemistry

Background:

• Tea polysaccharide (TPS) possesses unique biological properties, driving interest in its applications.
• Understanding the molecular characteristics of TPS is crucial for its effective utilization.
• Existing methods for TPS characterization are insufficient, necessitating advanced analytical approaches.

Purpose of the Study:

• To investigate the molecular characteristics of tea polysaccharide (TPS).
• To establish appropriate analytical methods for TPS characterization.
• To elucidate the molecular weight, size, and conformation of TPS.

Main Methods:

• High-performance size-exclusion chromatography (HPSEC)
• Multi-angle laser light scattering (MALLS)
• Viscosimetry

Main Results:

• Molar masses of TPS ranged from 2.287 x 10(5) to 2.762 x 10(5) g/mol.
• Root-mean-square radii (RMS radii) were between 132.1 and 145.9 nm.
• The Mark-Houwink equation ([eta]=0.5423 M(w)(0.5379)) and molecular parameters were determined.

Conclusions:

• TPS exhibits a homogeneous and spherical molecular morphology in solution.
• The polymer chains of TPS show branching characteristics.
• This study provides critical insights into TPS molecular structure for potential applications.