Comparison of different pretreatments on drying characteristics, physical properties, nutritional compounds and antioxidant activity of heat pump-dried longan pulp
文献类型： 外文期刊
作者： Zhu, Jingnan 1 ; Peng, Jian 1 ; Li, Jun 1 ; Li, Lu 1 ; Bi, Jinfeng 3 ; Yang, Wanyuan 4 ; Yi, Jianyong 3 ; Chen, Shupeng 4 ; Xu, Yujuan 1 ; Gu, Qingqing 2 ;
作者机构： 1.Guangdong Acad Agr Sci, Sericultural & Agrifood Res Inst, Key Lab Funct Foods, Guangdong Key Lab Agr Prod Proc,Minist Afr & Rural, Guangzhou 510610, Peoples R China
2.Jiangxi Agr Univ, Coll Agr, Nanchang 330045, Peoples R China
3.Chinese Acad Agr Sci, Inst Food Sci & Technol, Key Lab Agroprod Proc, Minist Agr & Rural Affairs, Beijing 100193, Peoples R China
4.Guangdong Jiabao Grp Co Ltd, Chaozhou 515638, Peoples R China
关键词： drying characteristics; longan pulp; pretreatments; quality assessment
期刊名称：INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY （ 影响因子：3.3； 五年影响因子：3.5 ）
ISSN： 0950-5423
年卷期： 2023 年 58 卷 7 期
页码：
收录情况： SCI
摘要： Drying pretreatments are usually considered as effective way to improve the quality of dried fruit products. The results of this research showed that the blanching (BL), ultrasonic (US) and freeze-thaw (FT) pretreatments could significantly shorten the drying time, and improve the rehydration capacity of the dried longan pulp. Compared with the control group (CK, without pretreatment), more irregular inner micropores were formed in the dried longan pulp treated with BL, US and FT. Besides, the brightness and yellowness of dried longan pulp with pretreatments were higher than those of the CK. The higher retention rates of total phenolic content (292.54 mg/100 g d.b.) and ascorbic acid (2.38 mg g(-1) d.b.) were observed in the dried longan pulp treated with BL. Meanwhile, a higher chlorogenic acid content was found in the samples treated with FT (3.68 mg/100 g d.b.) and radio frequency (RF) (3.10 mg/100 g d.b.). Furthermore, the highest retention of a total free amino acid (1843.13 mg/100 g d.b) was exhibited by RF-treated longan pulp. This work guides how pretreatments are applied prior to longan pulp drying.
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