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Câmpean ȘI, Beșchea GA, Tăbăcaru MB, Scutaru LM, Dragomir G, Brezeanu AI, Șerban A, Năstase G. Preservation of black grapes by isochoric freezing. Heliyon 2023; 9:e17740. [PMID: 37455964 PMCID: PMC10344757 DOI: 10.1016/j.heliyon.2023.e17740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 06/20/2023] [Accepted: 06/27/2023] [Indexed: 07/18/2023] Open
Abstract
Fruits are perishable. It's crucial to have an efficient preservation technique that may extend storage duration while maintaining the physical quality and nutritional values to avoid wastage. The majority of long-term storage solutions for fruits use refrigeration. In this study, we evaluate the potential of isochoric freezing as an alternative method of preservation for black grapes (Vitis vinifera L.). We compare the properties of black grapes preserved for 7 days in trehalose solution at -4 °C in isochoric conditions (average pressure 34.2 MPa) with those of fresh black grapes and with grapes preserved isobarically in four conditions (room temperature, in the fridge, in the freezer, and in a plastic bag filled with trehalose solution). The results indicate that grapes preserved by isochoric freezing at temperatures below the freezing point of water do not lose weight; on the contrary, they resulted in a very small (2%) weight gain. Freezing under isochoric conditions did not result in significant changes in terms of macroscopic appearance, colour, firmness, °Brix values, or pH. We consider that isochoric freezing has the potential to be used as a preservation method for grapes while maintaining physicochemical parameters similar to those of fresh fruits.
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Affiliation(s)
- Ștefan Ioan Câmpean
- Transilvania University of Brasov, Department of Building Services, Brasov, Romania
| | | | | | | | - George Dragomir
- Transilvania University of Brasov, Department of Building Services, Brasov, Romania
| | - Alin Ionut Brezeanu
- Transilvania University of Brasov, Department of Building Services, Brasov, Romania
| | - Alexandru Șerban
- University Politehnica of Bucharest, Thermotechnics, Engines, Thermal and Refrigeration Equipment Department, Bucharest, Romania
| | - Gabriel Năstase
- Transilvania University of Brasov, Department of Building Services, Brasov, Romania
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Zhang Y, Xu Y, Wang Q, Zhang J, Dai X, Miao S, Lu X. The antioxidant capacity and nutrient composition characteristics of lotus ( Nelumbo nucifera Gaertn.) seed juice and their relationship with color at different storage temperatures. Food Chem X 2023; 18:100669. [PMID: 37168721 PMCID: PMC10164921 DOI: 10.1016/j.fochx.2023.100669] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 03/23/2023] [Accepted: 03/29/2023] [Indexed: 05/13/2023] Open
Abstract
The effects of different storage temperatures on the nutritional quality, color, and antioxidant capacity of lotus seed juice and the correlations between various physicochemical indices and antioxidant capacity during storage were investigated in this study. The results showed that the overall retention rate of various nutrients and antioxidant activity in lotus seed juice under low-temperature storage was better than that under 37 °C storage. Meanwhile, temperature had a significant effect on increasing the browning of lotus seed juice and the change in L*. The results of Pearson correlation and redundancy analysis (RDA) showed that the reduction in antioxidant activity in lotus seed juice aggravated the browning index of the system at high temperatures. The color changes in the system were closely related to the clarity of lotus seed juice and aging of starch at low temperatures.
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Affiliation(s)
- Yanlin Zhang
- College of Food Science, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, 350002 Fuzhou, China
- China-Ireland International Cooperation Center for Food Material Science and Structure Design, Fujian Agriculture and Forestry University, 350002 Fuzhou, China
| | - Yixian Xu
- College of Food Science, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, 350002 Fuzhou, China
- China-Ireland International Cooperation Center for Food Material Science and Structure Design, Fujian Agriculture and Forestry University, 350002 Fuzhou, China
| | - Qi Wang
- Institute of Agricultural Engineering, Fujian Academy of Agricultural Sciences, 350003 Fuzhou, China
| | - Jingyuan Zhang
- College of Food Science, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, 350002 Fuzhou, China
- China-Ireland International Cooperation Center for Food Material Science and Structure Design, Fujian Agriculture and Forestry University, 350002 Fuzhou, China
| | - Xin Dai
- College of Food Science, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, 350002 Fuzhou, China
- China-Ireland International Cooperation Center for Food Material Science and Structure Design, Fujian Agriculture and Forestry University, 350002 Fuzhou, China
| | - Song Miao
- Teagasc Food Research Centre, Food Chemistry and Technology Department, Moorepark, Fermoy, Co.Cork, Ireland
- China-Ireland International Cooperation Center for Food Material Science and Structure Design, Fujian Agriculture and Forestry University, 350002 Fuzhou, China
| | - Xu Lu
- College of Food Science, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, 350002 Fuzhou, China
- Teagasc Food Research Centre, Food Chemistry and Technology Department, Moorepark, Fermoy, Co.Cork, Ireland
- Institute of Food Science and Technology, Fujian Agriculture and Forestry University, 18 Simon Pit Road, 350002 Fuzhou, China
- China-Ireland International Cooperation Center for Food Material Science and Structure Design, Fujian Agriculture and Forestry University, 350002 Fuzhou, China
- Fujian Provincial Key Laboratory of Quality Science and Processing Technology in Special Starch, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Corresponding author at: College of Food Science, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, 350002 Fuzhou, China.
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Wu X, Zhang Y, Zhong Q. Optimization of the Brewing Conditions of Shanlan Rice Wine and Sterilization by Thermal and Intense Pulse Light. Molecules 2023; 28:molecules28073183. [PMID: 37049943 PMCID: PMC10096255 DOI: 10.3390/molecules28073183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/28/2023] [Accepted: 03/28/2023] [Indexed: 04/07/2023] Open
Abstract
This study aimed to optimize the brewing conditions of Shanlan rice wine (SRW) and select a suitable sterilization method. The response surface method experiment was used to optimize the brewing process of SRW. LC-MS/MS (liquid chromatography–tandem mass spectrometry) and GC-MS (gas chromatography–mass spectrometry) were used to analyze the physicochemical components, free amino acids, and flavor metabolites of the thermal-sterilized SRW and the SRW sterilized by intense pulsed light (IPL), respectively. Results showed that the optimum fermentation conditions of SRW were as follows: fermentation temperature, 24.5 °C; Qiuqu amount (the traditional yeast used to produce SRW), 0.78%; water content, 119%. Compared with the physicochemical properties of the control, those of the SRWs separately treated with two sterilization methods were slightly affected. The 60 s pulse treatment reduced the content of bitter amino acids, maintained sweet amino acids and umami amino acids in SRW, and balanced the taste of SRW. After pasteurization, the ester content in wine decreased by 90%, and the alcohol content decreased to different degrees. IPL sterilization slightly affected the ester content and increased the alcohol content. Further analysis of the main flavor metabolites showed that 60 s pulse enhanced the important flavor-producing substances of SRW. In conclusion, 60 s pulse is suitable for sterilizing this wine.
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Affiliation(s)
- Xiaoqian Wu
- School of Food Science and Engineering, Hainan University, Haikou 570228, China
- Key Laboratory of Food Nutrition and Functional Food of Hainan Province, Haikou 570228, China
| | - Yunzhu Zhang
- School of Biomedical Engineering, Hainan University, Haikou 570228, China
| | - Qiuping Zhong
- School of Food Science and Engineering, Hainan University, Haikou 570228, China
- Key Laboratory of Food Nutrition and Functional Food of Hainan Province, Haikou 570228, China
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Basak S, Jha T, Chakraborty S. Pasteurization of tender coconut water by pulsed light treatment: Microbial safety, enzymatic inactivation, and impact on physicochemical properties. INNOV FOOD SCI EMERG 2023. [DOI: 10.1016/j.ifset.2023.103302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
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Pulsed Light Processing in the Preservation of Juices and Fresh-Cut Fruits: A Review. FOOD BIOPROCESS TECH 2022. [DOI: 10.1007/s11947-022-02891-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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