Effect of freezing rate on the quality properties of Medjool dates at the tamr stage

Abstract

Date palm fruits have special considerations in people's social life in North Africa and the Middle East regions (Zaitoon et al., 2016). Date palm fruits have high nutritional values: they are considered to be a rich source of sugar, fiber, minerals, and considerable amounts of vitamin A, B-complex, and C (Al-Farsi & Lee, 2008; Al-Khayri et al., 2015). They also have remedial effects, due to their phytochemical contents; involving carotenoids, polyphenols, tannins, and sterols, which are known for their antioxidant activity, cholesterol-lowering properties, and chemoprevention of cancer, diabetes, and cardiovascular diseases (Barnett et al., 2000; Johnson et al., 2015). Egypt is the first in the production of date fruit with 1,562,171 metric tons in 2018, accounting for 18.3% of the global production (FAOSTAT, 2020). Medjool dates are obtained at the tamr stage (the third stage of date fruits ripening, where the fruits are hard or semi-hard with dark colors (Johnson, 2011)). Medjool date is becoming an interesting variety to the Egyptians. It is grown in southwest Egypt. It is economically promising.

High‐humidity hot‐air impingement blanching conditions for the inhibition of potato‐browning enzymes and for quality retention

“…The TPA test simulates the movement of human jaws, 40 providing textural parameters relevant to the processing of food material. The textural characteristics (hardness, adhesiveness, springiness, cohesiveness, gumminess, and chewiness) of the potato slices derived from the TPA are summarized in Table 4.…”

“…The mechanical properties of potato samples were estimated by texture profile analysis (TPA) using a texture analyzer (TA‐XT plus, Stable Micro Systems, Godalming, UK) following the method described by Mowafy et al 40 . with slight modifications.…”

“…The mechanical properties of potato samples were estimated by texture profile analysis (TPA) using a texture analyzer (TA-XT plus, Stable Micro Systems, Godalming, UK) following the method described by Mowafy et al 40 with slight modifications. The TPA test trigger force, pretest speed, test speed, and post-test speed were 5 g, 2, 0.5, and 2 mm.s −1 , respectively.…”

Design of Air Blast Freezing System Using Cascade Refrigeration R290/R32 System with Capacity 5kg

“…Mowafy, et al [15] conducted a study on the effect of freezing rate on Medjol dates. The Air Blast Freezing system was used to investigate the effect of freezing rate at three different freezing temperature settings (-20, -25, and -30℃) on Medjool quality parameters.…”

Effect of magnetic field‐assisted freezing on water migration, fractal dimension, texture, and other quality changes in tilapia

“…The application of electric field, magnetic field, liquid nitrogen, low temperature plasma, and other technologies in food is gradually increasing. This article focuses on the applicability of magnetic field in tilapia, hoping to achieve the purpose of increasing the freezing rate and improving the quality of frozen tilapia (Fadiji et al., 2021; Jia et al., 2017; Mowafy et al., 2020).…”