Cold plasma pre-treatment-Power 650 W, the gas flow 0.2 Mpa, working voltage of 5 kV and frequency of 40 kHz. Air is used to generate plasma at atmospheric pressure, and the flow rate of plasma afterglow was 135 L.min-1. |
The pre-treatment improved the contents of procyanidins, flavonoids, and phenolics by 53.81%, 33.89%, and 13.85% at most, respectively, and thereby enhanced antioxidant capacity by 36.85% at most. |
(Bao et al., 2021Bao, T., Hao, X., Shishir, M. R. I., Karim, N., & Chen, W. (2021). Cold plasma: an emerging pretreatment technology for the drying of jujube slices. Food Chemistry, 337(1), 127783. http://dx.doi.org/10.1016/j.foodchem.2020.127783. PMid:32791427. http://dx.doi.org/10.1016/j.foodchem.202...
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Soaking pre-treatment-in a solution of 5% potassium carbonate and 0.5% olive oil |
The pre-treatment positive effect on effective diffusion, total phenol, total antioxidant and total color change properties. |
(Doymaz et al., 2016Doymaz, I., Karasu, S., & Baslar, M. (2016). Effects of infrared heating on drying kinetics, antioxidant activity, phenolic content, and color of jujube fruit. Food Measure, 10(2), 283-291. http://dx.doi.org/10.1007/s11694-016-9305-4. http://dx.doi.org/10.1007/s11694-016-930...
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Soaking pre-treatment-ethyl oleate solution followed by slow freezing at -18 °C high pressure carbon dioxide (HPCD), and hot water blanching (HWB). |
The method of AEEO + freeing pre-treatment damaged epidermis structure of jujube. This pre-treatment led to the moisture in jujube much more easily diffused and evaporated. The AEEO + freeing groups were the minimum and the HWB groups were the maximum. |
(Dongsheng et al., 2017Dongsheng, L., Yuli, Z., Mei, W., Xiaosong, H., & Jihong, W. (2017). Effects of pretreatment on characteristics and qualities of Chinese jujube drying by segmented intermittent microwave coupled with hot air. Nongye Gongcheng Xuebao, 33(7), 261-267.) |
Carbon dioxide (CO2) pre-treatment-containing 5% CO2 and 95% N2 by modified atmosphere packaging machine. |
The pre-treatment changes the texture and aroma of jujube that caused an accumulation of acetaldehyde and ethanol. |
(Chen et al., 2017Chen, K., Gao, L., Li, Q., Li, H. R., & Zhang, Y. (2017). Effects of CO2 pretreatment on the volatile compounds of dried chinese jujube (Zizyphus jujuba Miller). Food Science and Technology, 37(4), 578-584. http://dx.doi.org/10.1590/1678-457x.20016. http://dx.doi.org/10.1590/1678-457x.2001...
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Soaking pre-treatment-boiling treatment with 3% sodium chloride dipping treatment in glycerol. |
The bulk density was highest with BTS. The soluble solids content was highest with. The titratable acidity was higher with DTG, and BTS showed the best browning-retarding effect., |
(Kim et al., 2013Kim, J.-W., Lee, S.-H., No, H.-K., Hong, J.-H., Park, C.-S., & Youn, K.-S. (2013). Effects of pretreatment and drying methods on quality and antioxidant activities of dried jujube (Zizyphus jujuba) fruit. Journal of the Korean Society of Food Science and Nutrition, 42(8), 1242-1248. http://dx.doi.org/10.3746/jkfn.2013.42.8.1242. http://dx.doi.org/10.3746/jkfn.2013.42.8...
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Soaking pre-treatment-dipping in 2% ethyl oleate plus 5% K2CO3 for 10 min. |
Time-saving effect. The beneficial effect was considered based on its cuticle destruction. Activation energies decreased. |
(Baomeng et al., 2014Baomeng, Z., Xuesen, W., & Guodong, W. (2014). Effect of pre-treatments on drying characteristics of Chinese jujube (Zizyphus jujuba Miller). International Journal of Agricultural and Biological Engineering, 7(1), 94-101.) |
Pulsed electric fields (PEF) pre-treatment-1.5 kV.cm−1, 1 Hz. |
The pulsed electric fields (PEF) pre-treatment improved phenolic compounds extraction, especially for caffeic acid, morin and p‐hydroxybenzoic acid. |
(Xu et al., 2019Xu, L. F., Tang, Z. S., Wen, Q. H., Zeng, X. A., Brennan, C., & Niu, D. (2019). Effects of pulsed electric fields pretreatment on the quality of jujube wine. International Journal of Food Science & Technology, 54(11), 3109-3117. http://dx.doi.org/10.1111/ijfs.14226. http://dx.doi.org/10.1111/ijfs.14226...
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