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Aggregation induced by the synergy of sodium chloride and high-pressure improves chlorophyll stability
Fangwei Li1, Liang Zhou1, Jiarui Cao1
1College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, People's Republic of China; National Engineering Research Center for Fruit and Vegetable Processing, Ministry of Science and Technology, Beijing 100083, People's Republic of China.
Abstract:
The development of green vegetable processing is still limited by the imperfect green protection now. Chlorophyll (Chl), the main pigment presented in green vegetables, was studied that the effects of NaCl on the stability of it, and the synergy of NaCl and high-pressure on Chl protection. Compared to the control, the retention of Chl was increased by 80.14% and the activation energy was 62.7% higher in 7.8% NaCl solution. When the pressure was 600 MPa with 7.8% NaCl, the synergy of NaCl and high-pressure increased the Chl retention by 100%. The restriction of NaCl to H2O provided Chl with a lower polarity environment and increased the contact between Chl molecules. And the fluorescence quenching confirmed the aggregation of Chls induced by high-pressure. This study explains the mechanism of green protection by NaCl and high-pressure, broadening the horizon for the development of color protection in vegetable processing.
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