scholarly journals Evaluation of chilling injury and internal browning condition on quality attributes, phenolic content, and antioxidant capacity during sub-optimal cold storage of malaysian cultivar pineapples

2019 ◽  
Vol 14 (4) ◽  
pp. 456-461
Author(s):  
Noer Hartini Dolhaji ◽  
Ida Idayu Muhamad ◽  
Harisun Ya’akub ◽  
Azila Abd Aziz
Keyword(s):  
Antioxidant Capacity ◽  
Cold Storage ◽  
Phenolic Content ◽  
Chilling Injury ◽  
Quality Attributes ◽  
Total Phenolic ◽  
Ion Leakage ◽  
Physical Injuries ◽  
Duration Of Storage ◽  
Internal Browning

Pineapple cold storage at sub-optimal temperature (4 ± 2 °C) and duration of storage (0, 7, 14, 21, and 28 days) was periodically tracked to investigate its effect on physical injuries known as chilling injury (CI) and internal browning (IB), which contribute to degradation of pineapple’s quality attributes (i.e., pH, total soluble solids (TSS) concentration, ascorbic acid (AA) content, ion leakage (EL), antioxidant capacity, and total phenolic content (TPC). In this study, three main Malaysian pineapple cultivars were evaluated based on the hypothesis that pineapple’s physical injuries (CI and IB) affect the quality attributes, phenolic content, and antioxidant capacity.  Towards day 28 of sub-optimal cold storage treatment, cv. Morris (Queen) showed higher CI and IB incidences. However, the incidences were not statistically significant at a significance level of 0.05 in two other pineapple varieties cv. Josephine (hybrid, between ‘Johor’ Spanish and Smooth Cayenne) and cv. MD-2 or gold (the hybrid of Smooth Cayenne)), which exhibited resistance to CI and IB. Meanwhile, it was found that sub-optimal cold storage up to 28 days affects CI and IB of three main Malaysian pineapple cultivars regardless of their genetic capability towards these injuries. Further, the study revealed that CI and IB symptoms were correlated with a decrease in TSS and pH, and an increase in the percentage of EL, TPC, antioxidant capacity, and antioxidant activities measured by FRAP and DPPH, respectively. Meanwhile, in terms of overall quality attributes result with focus interaction of TPC and antioxidant capacity, cv. MD-2 was observed to be impacted the most during sub-optimal cold storage. The study concluded that CI and IB conditions were positively correlated with the degradation of quality attributes as reflected in TSS content, pH, EL, TPC content, and total antioxidant capacity.

scholarly journals Lipid oxidation and antimicrobial activity of cooked beef patties as influenced by leaf extracts of “Cemba” (Albizia lebbeckoides [DC.] Benth)

2019 ◽  
Vol 43 (1) ◽  
Author(s):  
Hajrawati Hajrawati ◽  
Henny Nuraini ◽  
Irma Isnafia Arief ◽  
Dondin Sajuthi
Keyword(s):  
Lipid Oxidation ◽  
Antioxidant Capacity ◽  
Cold Storage ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Scavenging Activity ◽  
Beef Patties ◽  
Dpph Scavenging Activity ◽  
Dpph Scavenging

Cemba (Albizia lebbeckoides [DC.] Benth.) leaf extract (CLE) was evaluated for some physical properties, antioxidant and antimicrobial activities incorporated into beef patties during cold storage. Four Formulation employed were control, butylated hydroxytoluene (BHT) 0.01, CLE 0.5, and CLE 1% (w/w). The variables measured were proximate composition, cooking parameters, pH, aw, WHC, color, total phenolic content, antioxidant capacity, DPPH scavenging activity, TBARS value, and microbial total. The data were analyzed using ANOVA one factor for proximate and cooking parameters, and ANOVA with factorial 4x5 for pH, aw, WHC, color, total phenolic content, antioxidant capacity, DPPH scavenging activity, TBARS value, and microbial total and continued with Tukey test. The results of the study showed that the addition of the CLE did not affect the proximate composition and cooking parameters of the patties. The cooked beef patties with 1% CLE showed significantly lower (P<0.05) for TBARS value, pH, bacterial total (mesophilic and psychrophilic) compared to 0.5% CLE and controls. The total phenolic content, antioxidant capacity, scavenging activity of CLE 1 % were significantly higher (P<0.05) than 0.5% CLE and controls during the cold storage period (0, 7, 14, 21, and 28 days). Addition of both 0.5 and 1% CLE in cooked beef patty reduced bacteria total. The addition of 1% CLE had equivalent to BHT 0.01% effect in retarding lipid oxidation. In conclusion, the CLE 1% was effective to retard lipid oxidation and inhibit bacteria growth of cooked beef patties.

scholarly journals THE EFFECT OF DRYING TEMPERATURE, CUTTING TYPES, STORAGE DEGREE AND PERIOD ON PHYSICAL, CHEMICAL AND PHYSICOCHEMICAL PROPERTIES OF RED CAPIA PEPPER

2022 ◽  
Vol 52 (1) ◽  
pp. 67-72
Author(s):  
Dilek Cemal ◽  
Gulcin Yildiz
Keyword(s):  
Antioxidant Capacity ◽  
Cold Storage ◽  
Total Phenolic Content ◽  
Dry Matter ◽  
Phenolic Content ◽  
Titratable Acidity ◽  
Convective Drying ◽  
Total Phenolic ◽  
Rehydration Ratio ◽  
Physical Chemical

This work was undertaken to evaluate the effects of different drying temperatures ​​(50, 60 and 70 oC) and cutting types (ring and cube) on the physical, chemical and physiochemical properties of red capia pepper during storage (14 days) both at room temperature and cold storage. Convective drying (CVD) at 50, 60 and 70 oC was applied to obtain dried red capia peppers. The effects of CVD on color values (L*, a*, b*), rehydration ratio, selected chemical properties (dry matter, pH and titratable acidity) and bioactive compounds (total phenolic content and antioxidant capacity) of thirteen dried red capia peppers were compared. The samples dried at 60 oC in ring forms under cold storage (6R-CD samples) showed the highest dry matter, pH, titratable acidity and rehydration ratio (87.06%, 5.69, 807.15 mg citric acid/100 g, 6.72%, respectively). The closest L*, a*, b*values to the fresh pepper samples were achieved for 6R-CD samples (L*:29.87, a*:12.83, and b*:17.03). In addition, 6R-CD samples resulted with highest antioxidant capacity and total phenolic content in all storage times.

EXTRACTION OPTIMIZATION AND ANTIOXIDANT ACTIVITY OF PHENOLIC COMPOUNDS FROM AVOCADO PEEL

2019 ◽  
pp. 49-59
Author(s):  
Nu Linh Giang Ton ◽  
Thi Hoai Nguyen ◽  
Quoc Hung Vo
Keyword(s):  
Antioxidant Activity ◽  
Response Surface Methodology ◽  
Antioxidant Capacity ◽  
Response Surface ◽  
Total Antioxidant Capacity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Quadratic Model ◽  
Total Phenolic ◽  
Total Antioxidant

Avocado peel has been considered as a potential source of natural antioxidants in which phenolics are among the most important compounds. Therefore, this study aims to optimize the extraction process of phenolics using response surface methodology and evaluate the corresponding antioxidant activity. From the quadratic model, the optimal condition was determined including the ethanol concentration 54.55% (v/v), the solvent/solute ratio 71.82/1 (mL/g), temperature 53.03 oC and extraction time 99.09 min. The total phenolic content and the total antioxidant capacity at this condition with minor modifications were 26,74 ± 0,04 (mg GAE/g DW) and 188.06 ± 1.41 (mg AAE/g DW), respectively. The significant correlation between total phenolic content and total antioxidant capacity was also confirmed. Key words: response surface methodology, central composite rotatable design, total phenolic content, total antioxidant capacity, avocado peel

Effect of Supplementation of Amaranth Flour on Various Quality Attributes and Antioxidant Activities of Bread

2020 ◽  
Vol 16 (3) ◽  
pp. 391-396
Author(s):  
Huma Mukhtar ◽  
Amir Gull ◽  
Tariq A. Ganaie ◽  
Sajad A. Rather ◽  
Farooq A. Masoodi ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Wheat Flour ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Quality Attributes ◽  
Wheat Bread ◽  
Total Phenolic ◽  
Water Retention Capacity ◽  
Whole Wheat Bread ◽  
Amaranth Flour

Background: The present investigation was carried to develop amaranth based wheat flour bread. Products were developed by using different levels of amaranth flour and wheat flour in the ratio of 0:100,5:95, 10:90 and 15:85 respectively. Methods: Physico-chemical, antioxidant activity, total phenolic content and physical properties of amaranth supplemented bread were evaluated. Results: Results revealed an increase in moisture content from31.41 -33.35%, ash content 0.95- 1.52%, protein content 12.19% -13.23%, fat content 2.21% -2.81% and crude fiber 1.13-1.74%, and decrease in nitrogen free extract, alkali water retention capacity 52.11-47.35% and 137.66-112.00% respectively. Also it was observed that amaranth flour supplemented bread showed decrease in total phenolic content, antioxidant activity and FRAP assay with increase in substitution level. Color evaluation showed increase in L* and a* value of bread crust, while as bread crumb shows decrease in b* and L* value respectively. Nutritional evaluation revealed that among the samples tested 85% wheat flour and 15% amaranth flour supplemented bread was rated best as it was also evident from nutritional analysis. Conclusion: Maximum substitution of wheat flour with amaranth flour were 10% in terms of desirable bread quality attributes. The composite breads would serve as functional food, because of its high nutritional value than whole-wheat bread.

scholarly journals Evaluation of chemical characteristics and correlation analysis with pulp browning of advanced selections of apples grown in Brazil

2017 ◽  
Vol 39 (1) ◽  
pp. 103 ◽  
Author(s):  
Luciana Ercoli ◽  
Érica Oliveira Barizão ◽  
Joana Shuelter Boeing ◽  
Marcus Vinícius Kvitschal ◽  
Jesuí Vergilio Visentainer ◽  
...  
Keyword(s):  
Vitamin C ◽  
Antioxidant Capacity ◽  
Phenolic Content ◽  
Titratable Acidity ◽  
Enzymatic Browning ◽  
Total Phenolic ◽  
Chemical Characteristics ◽  
Antioxidant Capacities ◽  
Total Titratable Acidity ◽  
Selection Of

In this research, the total phenolic content (TPC) and antioxidant capacity (FRAP and DPPH•× assays) of pulps and peels of advanced selection of apples grown in Brazil were investigated. The correlation analyses between the activity of polyphenoloxidase enzyme (PPO), vitamin C content, total titratable acidity, and color parameters were performed. The results indicated that the data differed significantly among the apple genotypes studied. The peels of the selection Epagri 170-91 and Epagri 170-25 showed the highest TPC and antioxidant capacities. In addition, the pulps of the Epagri 170-91 presented the highest TPC and antioxidant capacities, the lowest enzymatic browning, highest amount of vitamin C and lowest enzymatic activity when compared with other genotypes. The TPC and antioxidant capacities were significantly correlated in all genotypes analyzed. High correlation values between enzymatic browning and factors that affect the apple color were also found in all analyzed pulps, except between enzymatic browning and TPC. The results demonstrated that the enzymatic browning and TPC, as well as the antioxidant capacity and chemical characteristics, vary considerably depending on the apple genotypes and fruit tissues analyzed. 

scholarly journals Optimization of Natural Antioxidants Extraction from Pineapple Peel and Their Stabilization by Spray Drying

Foods ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1255
Author(s):  
Sofia C. Lourenço ◽  
Débora A. Campos ◽  
Ricardo Gómez-García ◽  
Manuela Pintado ◽  
M. Conceição Oliveira ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Capacity ◽  
Spray Drying ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Food Products ◽  
Total Phenolic ◽  
Dry Extract ◽  
Pineapple Peel ◽  
Dpph Method

Pineapple peel still contains an important amount of phenolic compounds and vitamins with valuable antioxidant activity. In this way, the aim of this study was the recovery of the bioactive compounds from pineapple peel using environmentally friendly and low-cost techniques, envisaging their application in food products. From the solid-liquid extraction conditions tested, the one delivering an extract with higher total phenolic content and antioxidant capacity was a single extraction step with a solvent-pineapple peel ratio of 1:1 (w/w) for 25 min at ambient temperature, using ethanol-water (80–20%) as a solvent. The resulting extract revealed a total phenolic content value of 11.10 ± 0.01 mg gallic acid equivalent (GAE)/g dry extract, antioxidant activity of 91.79 ± 1.98 µmol Trolox/g dry extract by the DPPH method, and 174.50 ± 9.98 µmol Trolox/g dry extract by the FRAP method. The antioxidant rich extract was subjected to stabilization by the spray drying process at 150 °C of inlet air temperature using maltodextrin (5% w/w) as an encapsulating agent. The results showed that the antioxidant capacity of the encapsulated compounds was maintained after encapsulation. The loaded microparticles obtained, which consist of a bioactive powder, present a great potential to be incorporated in food products or to produce bioactive packaging systems.

scholarly journals High-Throughput Screening and Characterization of Phenolic Compounds in Stone Fruits Waste by LC-ESI-QTOF-MS/MS and Their Potential Antioxidant Activities

Antioxidants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 234 ◽  
Author(s):  
Yili Hong ◽  
Zening Wang ◽  
Colin J. Barrow ◽  
Frank R. Dunshea ◽  
Hafiz A. R. Suleria
Keyword(s):  
Phenolic Compounds ◽  
Antioxidant Capacity ◽  
Prunus Persica ◽  
Phenolic Content ◽  
Antioxidant Potential ◽  
Stone Fruit ◽  
Total Phenolic ◽  
Stone Fruits ◽  
Antioxidant Power ◽  
Pharmaceutical Industries

Stone fruits, including peach (Prunus persica L.), nectarine (Prunus nucipersica L.), plum (Prunus domestica L.) and apricot (Prunus armeniaca L.) are common commercial fruits in the market. However, a huge amount of stone fruits waste is produced throughout the food supply chain during picking, handling, processing, packaging, storage, transportation, retailing and final consumption. These stone fruits waste contain high phenolic content which are the main contributors to the antioxidant potential and associated health benefits. The antioxidant results showed that plum waste contained higher concentrations of total phenolic content (TPC) (0.94 ± 0.07 mg gallic acid equivalents (GAE)/g) and total flavonoid content (TFC) (0.34 ± 0.01 mg quercetin equivalents (QE)/g), while apricot waste contained a higher concentration of total tannin content (TTC) (0.19 ± 0.03 mg catechin equivalents (CE)/g) and DPPH activity (1.47 ± 0.12 mg ascorbic acid equivalents (AAE)/g). However, nectarine waste had higher antioxidant capacity in ferric reducing-antioxidant power (FRAP) (0.98 ± 0.02 mg AAE/g) and total antioxidant capacity (TAC) (0.91 ± 0.09 mg AAE/g) assays, while peach waste showed higher antioxidant capacity in 2,2′-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) assay (0.43 ± 0.09 mg AAE/g) as compared to other stone fruits waste. Qualitative and quantitative phenolic analysis of Australian grown stone fruits waste were conducted by liquid chromatography coupled with electrospray-ionization quadrupole time-of-flight mass spectrometry (LC-ESI-QTOF-MS/MS) and HPLC-photodiode array detection (PDA). The LC-ESI-QTOF-MS/MS result indicates that 59 phenolic compounds were tentatively characterized in peach (33 compounds), nectarine (28), plum (38) and apricot (23). The HPLC-PDA indicated that p-hydroxybenzoic acid (18.64 ± 1.30 mg/g) was detected to be the most dominant phenolic acid and quercetin (19.68 ± 1.38 mg/g) was the most significant flavonoid in stone fruits waste. Hence, it could be concluded that stone fruit waste contains various phenolic compounds and have antioxidant potential. The results could support the applications of these stone fruit wastes in other food, feed, nutraceutical and pharmaceutical industries.

Investigating the effect of oxalic acid and salicylic acid treatments on the post-harvest life of temperate grown apricot varieties (Prunus armeniaca) during controlled atmosphere storage

2021 ◽  
pp. 108201322110320
Author(s):  
Mariya Batool ◽  
Omar Bashir ◽  
Tawheed Amin ◽  
Sajad Mohd Wani ◽  
FA Masoodi ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Oxalic Acid ◽  
Chilling Injury ◽  
Quality Attributes ◽  
Prunus Armeniaca ◽  
Soluble Solids ◽  
Carotenoid Content ◽  
Total Phenolic ◽  
Controlled Atmosphere ◽  
Injury Index

This study aimed at investigating the influence of different postharvest treatments with oxalic acid (OA) and salicylic acid (SA) on quality attributes and postharvest shelf life of temperate grown apricot varieties stored under controlled atmosphere (CA) storage conditions. After each treatment was given, the samples were stored in CA store maintained at a temperature of 0 °C, 90 ± 5% relative humidity, 5% oxygen and 15% carbon dioxide for 30 days. Results indicated that both OA and SA treatments significantly (p ≤ 0.05) retained total soluble solids, titratable acidity, color profile, ascorbic acid content and total phenolic content of apricot varieties and had a positive effect on antioxidant activity and texture of samples compared to control. However, carotenoid content was found to be higher in control. Both the treatments reduced chilling injury index, weight loss and decay percentage of samples. Moreover, it was found that SA treatment was the most effective treatment in maintaining visual color of apricots while OA maintained fruit firmness and effectively decreased the decay percentage and chilling injury index of apricot varieties. In conclusion, it was found that both OA and SA have the potential to extend storage life of apricots and maintain quality attributes of the crop during CA storage.

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