Related Experiment Video
Updated: May 2, 2026

TAPE: A Biodegradable Hemostatic Glue Inspired by a Ubiquitous Compound in Plants for Surgical Application
Published on: June 8, 2016
Condensed tannins from the pulp of Chinese hawthorn as an anti-browning agent: Structure, activity, and
Yi-Fan Cheng1, Dong-Yan Zhou1, Ze-Lin Liao1
1College of Life Science and Jiangxi Provincial Key Laboratory of Biodiversity Conservation and Resource Utilization (2023SSY02091), Jiangxi Normal University, Nanchang, Jiangxi 330022, China.
Abstract:
Condensed tannins (proanthocyanidins) were isolated from the pulp of Chinese hawthorn (Crataegus pinnatifida Bge. var. major N.E.Br.) and fractioned into three subfractions (F1-F3) using 40 %, 60 %, and 80 % ethanol on a macroporous resin column. HPLC-ESI-MS analysis revealed that epicatechin-polymerized procyanidins were the predominant components of the three subfractions, with mean degrees of polymerization (mDP) of 5.78, 10.09, and 3.03, respectively. These subfractions exhibited excellent antioxidant capacity and showed a significant positive correlation (P < 0.05) with mDP. The subfraction F2 was further proven to be an efficient inhibitor of polyphenol oxidase (PPO) and bacteria. In addition, subfraction F2 controlled the browning of fresh-cut apples by regulating phenolic metabolism, enhancing antioxidant system, and reducing lipid peroxidation. Overall, these findings provided a theoretical foundation for utilizing condensed tannins from Chinese hawthorn pulp as an effective anti-browning agent for fruits and vegetables.
Related Concept Videos
Basicity of Heterocyclic Aromatic Amines
Indirect-Acting Cholinergic Agonists: Chemistry and Structure-Activity Relationship
Reversible inhibitors display short to medium durations of action. Short-acting agents include simple alcohols with...
Cholinergic Antagonists: Chemistry and Structure-Activity Relationship
Adrenergic Agonists: Chemistry and Structure-Activity Relationship
Aromatic ring substitutions: Substituting the aromatic ring with –OH groups at positions 3 and 4 yields catecholamines (e.g., epinephrine), which have a high affinity for adrenoceptors. Hydrogen bonding between –OH groups and receptors enhances adrenergic activity.
Separation of...
Local Anesthetics: Chemistry and Structure-Activity Relationship
Structure-Activity Relationships and Drug Design
SAR studies the intricate relationship between a drug's chemical structure and biological activity. It focuses on understanding how modifications to a drug's structure can influence...

