Effect of aqueous extract, hydrosol, and essential oil forms of some endemic Origanum L. (Lamiaceae) taxa on polyphenol oxidase activity in fresh‐cut mushroom samples

2020 ◽  
Vol 44 (10) ◽  
Author(s):  
Esra Tanhaş ◽  
Esra Martin ◽  
Emine Nedime Korucu ◽  
Tuncay Dirmenci
Keyword(s):  
Essential Oil ◽  
Polyphenol Oxidase ◽  
Aqueous Extract ◽  
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.

Effect of high hydrostatic pressure and storage in fresh‐cut cashew apple: changes in phenolic profile and polyphenol oxidase activity

2021 ◽  
Author(s):  
Christiane Queiroz ◽  
Maria Lúcia M. Lopes ◽  
Antonio Jorge R. Silva ◽  
Eliane Fialho ◽  
Vera Lúcia Valente‐Mesquita
Keyword(s):  
Hydrostatic Pressure ◽  
Polyphenol Oxidase ◽  
High Hydrostatic Pressure ◽  
Oxidase Activity ◽  
Polyphenol Oxidase Activity ◽  
Phenolic Profile ◽  
Cashew Apple ◽  
Fresh Cut ◽  
And Storage

Determination of Polyphenol Oxidase Activity by Rotating Platinum Electrode

1956 ◽  
Vol 28 (7) ◽  
pp. 1177-1179 ◽  
Author(s):  
L. L. Ingraham
Keyword(s):  
Polyphenol Oxidase ◽  
Oxidase Activity ◽  
Platinum Electrode ◽  
Polyphenol Oxidase 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

Polyphenol Oxidase Activity of Plums (Prunus salicina) and Their Enzymatic Browning During Crushing

1980 ◽  
Vol 44 (4) ◽  
pp. 937-939
Author(s):  
Yoshihiro Komiyama ◽  
Mamoru Harakawa ◽  
Masao Tsuji
Keyword(s):  
Polyphenol Oxidase ◽  
Oxidase Activity ◽  
Enzymatic Browning ◽  
Polyphenol Oxidase Activity ◽  
Prunus Salicina
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