Effect of the black chokeberry (Aronia melanocarpa (Michx.) Elliott) juice acquisition method on the content of polyphenols and antioxidant activity

Abstract

The primary objective of the study was to determine the effect of process conditions on extraction efficiency and the total amount of released polyphenols and antioxidant activity (AA) in black chokeberry juice. The study samples were fruits of black chokeberry ( Aronia melanocarpa (Michx.) Elliott) cv. Galicjanka. In the study, two kinds of presses—piston press and twin gear juice extractor—were used, and two raw material pretreatment methods—freezing and thawing and enzymatic liquefaction—were applied. The study showed that pressing efficiency depends on the design of press and the nature of pretreatment. The highest pressing efficiency was obtained using the twin gear juice extractor. Enzymatic liquefaction of shredded fruits significantly increased the efficiency of pressing by the piston press. The type of press and the pretreatment method used had an effect on the quality traits of the extracted juices. The highest content of soluble solids was obtained for fruits not subjected to any pretreatment and pressed using the twin gear press. The highest total phenolic content was obtained in juice extracted using the piston press from shredded fruits subjected to enzymatic treatment at 45°C. A higher total phenolic content was also a characteristic of juice obtained from fruits not subjected to any pretreatment and extracted using the twin gear press. The capacity of the black chokeberry juices for free radical quenching oscillated around the level of approximately 90%. The study showed that the application of suitable processing methods is necessary for the acquisition of products with desirable quality traits.

Anthocyanins from Aronia melanocarpa Induce Apoptosis in Caco‐2 Cells through Wnt/β‐Catenin Signaling Pathway

“…AMA can induce apoptosis of Caco‐2 cells and block them from entering S phase of cell cycle in a concentration dependent manner. However, the decreased expression of key molecules in G1‐S phase, such as Cyclin D1, p21, p27, CDK2 and CDK4/6, [15] can cause cell aggregation in G0/G1 phase, which provides clues and hints for us to further explore the anticancer mechanism of AMA [16] …”

Comparative Phytochemical Analysis of Aronia melanocarpa L. Fruit Juices on Bulgarian Market

“…Application of different fruit processing and juice extraction techniques on the one hand, the time and period of harvesting and level of ripening on the other, may cause variations in the phenolic content of chokeberry fruits and fruit products, including pomace and juice [4,39,[48][49][50]. However, chokeberry products, including juices, remain very rich in phenolic compounds and high in antioxidant activity [51].…”

The Influence of Freezing and Thawing on the Yield and Energy Consumption of the Celeriac Juice Pressing Process

“…With reference to many studies, the freezing process negatively affects the pro-health properties of food only to a small extent, and for that reason, this method is commonly used in the food processing industry [32,33]. Nadulski et al's [13,28,29,34] study proves the possibility of maintaining the pro-health properties of fruit and vegetable juices while applying freezing and thawing methods as pulp pretreatment. To the best of our knowledge, there is no evidence regarding the use of freezing and thawing as a method supporting the process of pressing juice from celeriac roots.…”