Exogenous isoleucine can confer browning resistance on fresh-cut potato by suppressing polyphenol oxidase activity and improving the antioxidant capacity

2022 ◽  
Vol 184 ◽  
pp. 111772
Author(s):  
Zan Meng ◽  
Tong Wang ◽  
Aman Ullah Malik ◽  
Qingguo Wang
Keyword(s):  
Antioxidant Capacity ◽  
Polyphenol Oxidase ◽  
Oxidase Activity ◽  
Polyphenol Oxidase Activity ◽  
Fresh Cut

Effects of different edible coatings on polyphenol oxidase activity and colour of fresh-cut apple during cold storage

2015 ◽  
Vol 5 (2) ◽  
pp. 91 ◽  
Author(s):  
Charlotte Bertrand ◽  
Maria Filomena De Jesus Raposo ◽  
Rui Manuel Santos Costa De Morais ◽  
Alcina Maria Miranda Bernardo De Morais
Keyword(s):  
Polyphenol Oxidase ◽  
Cold Storage ◽  
Oxidase Activity ◽  
Edible Coatings ◽  
Polyphenol Oxidase Activity ◽  
Fresh Cut

Effects of the exopolysaccharide from Porphyridium cruentum coating on polyphenol oxidase activity and colour of fresh-cut banana during cold storage

2015 ◽  
Vol 5 (2) ◽  
pp. 167 ◽  
Author(s):  
Charlotte Bertrand ◽  
Maria Filomena De Jesus Raposo ◽  
Rui Manuel Santos Costa De Morais ◽  
Alcina Maria Miranda Bernardo De Morais
Keyword(s):  
Polyphenol Oxidase ◽  
Cold Storage ◽  
Oxidase Activity ◽  
Porphyridium Cruentum ◽  
Polyphenol Oxidase Activity ◽  
Fresh Cut

scholarly journals Comparison between Hyperspectral Imaging and Chemical Analysis of Polyphenol Oxidase Activity on Fresh-Cut Apple Slices

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Luna Shrestha ◽  
Boris Kulig ◽  
Roberto Moscetti ◽  
Riccardo Massantini ◽  
Elke Pawelzik ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Hyperspectral Imaging ◽  
Polyphenol Oxidase ◽  
Oxidase Activity ◽  
Polyphenol Oxidase Activity ◽  
Robust Detection ◽  
Deming Regression ◽  
Apple Slices ◽  
Fresh Cut

The assessment of the quality of fresh-cut apple slices is important for processing, storage, market value, and consumption. Determination of polyphenol oxidase activity (PPO) in apples is critical for controlling the quality of the final product (i.e., dried apples and juices). Hyperspectral imaging (HSI) is a nondestructive, noncontact, and rapid food quality assessment technique. It has the potential to detect physical and chemical quality attributes of foods such as PPO of apple. The aim of this study was to investigate the suitability of HSI in the visible and near-infrared (VIS-NIR) range for indirect assessment of PPO activity of fresh-cut apple slices. Apple slices of two cultivars (cv. Golden Delicious and Elstar) were used to build a robust detection algorithm, which is independent of cultivars and applied treatments. Partial least squares (PLS) regression using the 7-fold cross-validation method and method comparison analysis (Bland–Altman plot, Passing–Bablok regression, and Deming regression) were performed. The 95% confidence interval (CI) bands for the Bland–Altman analysis between the methods were −4.19 and 13.11, and the mean difference was 3.7e−12. The Passing–Bablok regression had a slope of 0.8 and an intercept of 7.6. The slope of the Deming regression was 0.8 within the CI bands of 0.56 and 1.10. These results show acceptable performance and no significant deviation from linearity. Hence, the results demonstrated the feasibility of HSI as an indirect alternative to the standard chemical analysis of PPO enzyme activity.

Polyphenol oxidase activity staining in polyacrylamide electrophoresis gels

1997 ◽  
Vol 34 (2) ◽  
pp. 155-159 ◽  
Author(s):  
Antonio Rescigno ◽  
Francesca Sollai ◽  
Andrea C Rinaldi ◽  
Giulia Soddu ◽  
Enrico Sanjust
Keyword(s):  
Polyphenol Oxidase ◽  
Oxidase Activity ◽  
Polyphenol Oxidase Activity ◽  
Activity Staining ◽  
Polyacrylamide Electrophoresis
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