scholarly journals Effect of Salicylic Acid and Calcium Nitrate Spraying on Qualitative Properties and Storability of Fresh Jujube Fruit (Ziziphus jujube Mill.)

2018 ◽  
Vol 46 (1) ◽  
pp. 138-147 ◽  
Author(s):  
Hadi ZERAATGAR ◽  
Gholam Hossain DAVARYNEJAD ◽  
Farid MORADINEZHAD ◽  
Bahram ABEDI
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Salicylic Acid ◽  
Phenolic Content ◽  
Calcium Nitrate ◽  
Soluble Solids ◽  
Total Phenolic ◽  
Fruit Firmness ◽  
Titrable Acidity ◽  
Jujube Fruit

Chinese jujube is among the important medicinal plants grown in Iran. Its valuable fruit have a short post-harvest life. Delaying of quality reduction for few days can help maintaining the shelf life of fresh jujube fruit. The current study was conducted to investigate the possible effects of pre-harvest foliar application of salicylic acid (0, 2 and 4 mM) and calcium nitrate (0, 1 and 2%) on physico-chemical characteristics and shelf life of fresh jujube fruit during storage at 10-days intervals, for 40 days. Results indicated that salicylic acid and calcium nitrate played an important role in maintaining and extending post-harvest quality of fresh jujube fruit, as both substances increased fruit firmness, titrable acidity, total phenolic content, antioxidant activity, ascorbic acid and catalase enzyme, but reducing total soluble solids. The highest total phenolic content (2.38 µg gallic acid/gFW), antioxidant activity (76.73 mmolTrolox/g), ascorbic acid (222.4 mg/100g FW) and catalase enzyme (16.67 U. mg-1 protein), as well as the lowest total soluble solids content (23.11%) were observed when salicylic acid 4 mM was used. Furthermore, maximum fruit firmness (4.22 N) was obtained in the treatment containing calcium nitrate 2%. Treatment containing salicylic acid 2 mM and calcium nitrate 2% had the highest amount of titrable acidity TA (0.45 %). Based on the results, reducing trends of some components like ascorbic acid, antioxidant and phenol, were very fast, even when using salicylic acid and calcium nitrate; their application could cause a delay in these processes, but the quality reduction found could not be compensated. In other characteristics that had a slower quality reducing trend, the application of salicylic acid and calcium nitrate could cause at least a 10-day delay in the reduction of the amounts of these attributes.  In press: Online First articles have been peer reviewed, accepted for publication and published online without pagination. They will receive pagination when the issue will be ready for publishing as a complete number. After the pagination, the articles will be included in Volume 45, Issue 1, 2017. These articles are searchable and citable by they DOI (Digital Object Identifier), but DOI will become active after the articles will be included in the complete issue.

scholarly journals Antioxidant activity and phenolic acid content of selected vegetable broths

2017 ◽  
Vol 35 (No. 6) ◽  
pp. 469-475 ◽  
Author(s):  
Filiz Bilge Ertekin ◽  
Korkmaz Nazli ◽  
Budak Nilgun H ◽  
Seydim Atif C ◽  
Seydim Zeynep B Guzel
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Phenolic Acid ◽  
Acid Content ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Ascorbic Acid Content ◽  
Total Phenolic ◽  
Green Beans ◽  
Fresh Vegetables

The antioxidant activity and content of phenolic substances in vegetable broths were determined. Green beans, beetroots, courgettes, onions, parsley, carrots, cabbages, celery, broccoli, spinach, cauliflowers, and tomatoes were subjected to boiling. Fresh vegetables and vegetable broths were analysed for ascorbic acid content, total phenolic content, ORAC and TEAC values. Phenolic acids were quantified using HPLC. The ascorbic acid content of vegetables ranged from 5–109 mg/100 ml, while no ascorbic acids could be detected in vegetable broths. Total phenolic content was between 17–1729 mg GAE/l for all samples. ORAC and TEAC values of vegetable broths were between 0–3 µmol TE/ml and 0–2 µmol TE/ml, respectively. Gallic, chlorogenic, caffeic, p-coumaric, and ferulic acid were detected in both fresh vegetables and vegetable broths. The highest phenolic acid content was observed in water in which beetroots were boiled. It was found that the vegetable broths of beetroots, celery stalks, cabbages, parsley and broccoli harboured remarkable antioxidant activity.

Phytochemical and antioxidant activity of Cadaba farinosa Forssk stem bark extracts

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Emmanuel M. Halilu ◽  
Abdullahi M. Abdurrahman ◽  
Sylvester N. Mathias ◽  
Chinenye J. Ugwah-Oguejiofor ◽  
Muntaka Abdulrahman ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Free Radical ◽  
Ethyl Acetate ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Radical Scavenging ◽  
Stem Bark ◽  
Free Radical Scavenging ◽  
Total Phenolic

Abstract Cadaba farinosa is used in traditional medicine for treatment of cancer, diabetes, and rheumatism. The research was aimed at evaluating the phytochemical and antioxidant activity of the extracts. The powdered stem bark was extracted successively with the aid of Soxhlet extractor using n-hexane, ethyl acetate, and methanol. The resulting extracts were concentrated on rotary evaporator and the percentage yields were calculated. The phytochemical and TLC profiles of the extracts were studied. The antioxidant activity of the extracts and ascorbic acid (standard) were determined using 2, 2-diphenyl-1-picrylhydrazyl (DPPH) free radical assay. The total phenolic content of the extracts and tannic acid (standard) were evaluated using Folin–Ciocalteu reagent. The percentage yields of n-hexane, ethyl acetate, and methanol extracts were found to be 1.19, 1.37, and 13.93%, respectively. The phytochemical screening revealed the presence of tannins, flavonoids, saponins, cardiac glycosides, alkaloids, and triterpenoids. The TLC profiles of the extracts revealed the presence of compounds as evidenced from their R f values. The total phenolic content of ethyl acetate and methanol extracts were found to be 135 and 112 mg, respectively. The free radical scavenging activity demonstrated by the extracts was comparable to ascorbic acid. The ethyl acetate extract had higher phenolic content and demonstrated the highest free radical scavenging with IC50 31.07 mg/mL. The results of research have provided strong preliminary evidence of antioxidant activity which may be because of phenolic compounds in the extracts.

scholarly journals Physical and chemical characterization and quantification of bioactive compounds in berries and berry jams

2017 ◽  
Vol 38 (4) ◽  
pp. 1853 ◽  
Author(s):  
Lorena Mendes Rodrigues ◽  
Diene France de Souza ◽  
Elisângela Aparecida da Silva ◽  
Thais Odete de Oliveira ◽  
Juliana Pinto de Lima
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Phenolic Compounds ◽  
Bioactive Compounds ◽  
Ascorbic Acid Content ◽  
Titratable Acidity ◽  
Significant Loss ◽  
The Body ◽  
Soluble Solids ◽  
Total Phenolic

Brazil is the third largest producer of fresh fruits in the world. Among fruits, berries such as strawberry, blueberry and blackberry can be highlighted for the benefits they provide to the body, owing to their presence of bioactive compound content. The phenolic compounds, especially anthocyanins and ascorbic acid, are examples of bioactive compounds that mainly function in the body as antioxidants. However, the processing steps that lead to the generation of derivatives from these fruits, are damaging to these compounds, often leading to their loss. Thus, the aim of this study was to physically and chemically characterize fresh berries (strawberry, blueberry and blackberry) and their jams, and also to quantify and to evaluate the antioxidant activity of bioactive compounds in berries and their jams. The following parameters were analyzed: moisture, ash, pH, titratable acidity, soluble solids, and color. The levels of total phenolic compounds, total anthocyanins, ascorbic acid content and antioxidant activity were measured. We concluded that there were significant differences in the chemical composition of berries and jams. There was also a significant loss of bioactive compounds due to processing, nevertheless these jams remain good sources of bioactive compounds, and are still considered important to promote some favorable health effects.

scholarly journals Antioxidant and cytotoxic activities of Parabaena sagitatta Miers

2013 ◽  
Vol 41 (2) ◽  
pp. 155-158
Author(s):  
TM Quadery ◽  
F Islam ◽  
M Ahsan ◽  
CM Hasan
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Phenolic Compounds ◽  
Brine Shrimp ◽  
Phenolic Content ◽  
Soluble Fraction ◽  
Total Phenolic ◽  
Cytotoxic Activities ◽  
Total Antioxidant Activity ◽  
Total Antioxidant

A methanolextract of the leaves of Parabaena sagitatta Miers and its petroleum ether, carbon tetrachloride, dichloromethane, ethylacetate and aqueous soluble partitionates were evaluated for antioxidant activity by 1,1-diphenyl-2-picrylhydrazyl (DPPH), Folin-Ciocalteau reagent and phosphomolybdenum total antioxidant assays by using butylated hydroxytolune (BHT) and ascorbic acid as standards. The dichloromethane soluble fraction demonstrated the presence of significant amount of phenolic compounds 61.06 ± 0.54 mg GAE/g of extract and also has moderate antioxidant activity IC50 50.62 ± 0.25 ?g/ml. A positive correlation (R2), 0.969 was observed between total phenolic content and total antioxidant activity of P. sagitatta. The general toxicity was determined by brine shrimp lethality bioassay where the dichloromethane LC50DOI: http://dx.doi.org/10.3329/bjb.v41i2.13441 Bangladesh J. Bot. 41(2): 155-158, 2012 (December)

scholarly journals Determination of Phenolic Content, Ascorbic Acid, Antioxidant Activity and Antimicrobial Activity of Selected Fruit Waste

2019 ◽  
Vol 7 (4.14) ◽  
pp. 263 ◽  
Author(s):  
Syeril Nurfatihah Suhaimi ◽  
Erniee Eileen Rizlan Ross ◽  
Ishak Zubir ◽  
Shanti Navaratnam ◽  
Raseetha Siva Siva
Keyword(s):  
Antimicrobial Activity ◽  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Banana Peel ◽  
Total Phenolic ◽  
Zone Of Inhibition ◽  
Pineapple Peel ◽  
Cocoa Pod Husk

The aim of this study was to determine the total phenolic content (TPC), antioxidant activity, ascorbic acid content and antimicrobial activity of extracts obtained from cocoa pod husk, banana peel and pineapple peel. Banana peel had significantly highest total phenolic content (154.50 mg GAE/g) followed by pineapple peel (140.37 mg GAE/g) and cocoa pod husk (114.08 mg GAE/g). Antioxidant activity of these samples measured using DPPH assays. Banana peel showed significantly higher DPPH scavenging activity (95.74%) compared to pineapple peel (84.96%) and cocoa pod husk (68.33%). Pineapple peel resulted in significantly higher (44.19 ppm) ascorbic acid as measured using High performance liquid chromatography (HPLC) method compared to banana peel (28.56 ppm). Cocoa pod husk, banana peel and pineapple peel were observed for antimicrobial activity against Escherichia coli, Staphylococcus aureus and penicillium. Samples extract at different concentrations in E. coli, S.aureus and penicillium-seeded Mueller-Hinton agar medium, resulted zone of inhibition after 24 h incubation in 37°C for bacteria and 72 h incubation in 28ºC. Banana peel at 20 and 25mg/ml against S.aureus resulted in zone of inhibition 9.67, 11.67 mm and cocoa pod husk with 8.00, 9.67 mm respectively. Cocoa pod husk at 15, 20 and 25mg/ml against E.coli resulted in zone of inhibition 7.33, 9.33 and 10.33 mm and banana peel with 6.67, 7.33 and 7.67 mm respectively. Pineapple peel does not showed any inhibition zone against tested bacteria and fungi. 

scholarly journals Changes of quality traits and phytochemical components of jujube fruit treated with preharvest GA3 and Parka during cold storage

2020 ◽  
pp. 30-37
Author(s):  
Orhan Karakaya
Keyword(s):  
Antioxidant Activity ◽  
Cold Storage ◽  
Total Phenolics ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Total Flavonoids ◽  
Fruit Firmness ◽  
Quality Properties ◽  
Weight Losses ◽  
Jujube Fruit

The study aimed to assess the effects of pre-harvest gibberellic acid (GA3) and Parka applications on fruit quality and bioactive components of jujube (Ziziphus jujuba Mill. cv. ‘Li’) fruit during the storage. Fruit were kept at 0±0.5 °C and 90±5% RH for 45 days. Parka and GA3 applications delayed weight losses and respiration rate in the cold storage. While the effect of the Parka application on the decrease in fruit firmness values depending on the storage time was not significant, it can be said that GA3 application was effective in maintaining the fruit firmness in the cold storage. The increase in soluble solids content (SSC) during cold storage was less with GA3 application. The decrease in titratable acidity with ripening in the cold storage was similar in the Parka and control applications. It can be said that GA3 application was effective in maintaining the titratable acidity during storage and this effect increased with the combination of Parka+GA3. The highest vitamin C at the end of the storage was recorded in fruit treated with Parka. Total phenolics, total flavonoids and antioxidant activity decreased in all applications during the storage. GA3 and Parka applications retarded the losses in total phenolics, total flavonoids and antioxidant activity in the storage. As a result, it can be said that the pre-harvest GA3 and Parka applications give positive results in maintaining the quality properties of jujube fruit in the cold storage.

scholarly journals Bioactive Compounds, Antioxidant Activity and Color of Hydroponic Tomato Fruits at Different Stages of Ripening

2015 ◽  
Vol 43 (2) ◽  
pp. 404-412 ◽  
Author(s):  
Violeta NOUR ◽  
Mira Elena IONICA ◽  
Ion TRANDAFIR
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Radical Scavenging Activity ◽  
Tomato Fruit ◽  
Radical Scavenging ◽  
Fruit Weight ◽  
Soluble Solids ◽  
Total Phenolic ◽  
Hue Angle ◽  
Lycopene Content

This experiment was carried out in order to study the simultaneous effect of on-vine ripening and examined cultivars on fruit quality, color development and antioxidant content in two different types of tomatoes. ‘Admiro’ and ‘Komet’ (normal average fruit weight) and ‘Cheramy’ (cherry type) cultivars grown in hydroponic culture were used. Dry matter, soluble solids, titratable acidity, ascorbic acid, lycopene, b-carotene, total phenolic, total flavonoid content and hydrophilic antioxidant activity were measured in six ripening stages. Color of fruits was determined by CIELab system. The L*, a*, b* values were used to calculate hue angle (ho), chroma (C*) and a* to b* ratio. In all analysed cultivars total phenolic content increased as ripening progressed, reached the maximum at the pink stage and subsequently declined, while the trend of ascorbic acid was cultivar dependent. DPPH radical scavenging activity showed significant moderately strong positive correlations with total phenolics and ascorbic acid. The content of β-carotene increased constantly during ripening while lycopene content registered a sharp rise, especially in the last stage of ripening when 47.2% of the lycopene content was accumulated. During ripening the lightness (L*) decreased because tomato fruit colour became darker while the ratio of red to green colour increased as a result of carotenoids synthesis. Among color indexes, hue angle (ho) was best correlated with lycopene content (r = −0.758), followed by a* (r = 0.748), C* (r = 0.708) and a*/b* (r = 0.683). Better correlations were established between main carotenoids content (lycopene + b-carotene) and each of the color indexes.

scholarly journals Determination of Biochemical Contents of Fresh, Oven-Dried, and Sun-Dried Peels and Pulps of Five Apple Cultivars (Amasya, Braeburn, Golden Delicious, Granny Smith, and Starking)

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Zeynep Ergün
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Malic Acid ◽  
Total Phenol ◽  
Total Flavonoid ◽  
Soluble Solids ◽  
Food Storage ◽  
Total Phenolic ◽  
Golden Delicious ◽  
Apple Cultivars

This study aimed to investigate the biochemical compounds of five different apple cultivars (Amasya, Braeburn, Golden Delicious, Granny Smith, and Starking) grown in the same location and to reveal the differences between peel and pulp in the fresh, oven-dried, and sun-dried samples. Sugar and organic acid contents were analyzed through high-performance liquid chromatography. Besides, antioxidant activity, total flavonoid, and total phenolic contents were analyzed with a spectrophotometer. The results of these analyses showed that the compounds varied between peel and pulp and among fresh, oven-dried, and sun-dried samples. The largest level of total flavonoid was found in Amasya oven-dried peel, and the largest total phenol, antioxidant activity, fructose, and total sugar levels were observed in Amasya sun-dried peel. Moreover, the largest L-ascorbic acid was detected in Amasya oven-dried pulp. Granny Smith oven-dried pulp was rich in citric, succinic acids, and glucose. Braeburn sun-dried pulp, Golden Delicious oven-dried pulp, and Granny Smith sun-dried pulp contained the largest sucrose, malic acid, and total soluble solids levels, respectively. For data interpretation, t-test, ANOVA, Duncan’s test, Kruskal–Wallis H test, and principal component analysis were performed. The peel contained significantly higher total flavonoid, total phenol, and antioxidant activity than pulp. Moreover, among fresh, oven-dried, and sun-dried samples, total phenol, succinic acid, malic acid, and L-ascorbic acid significantly differed. As a whole, the pulp was rich in sugars. The results provide valuable information on the food quality parameters of five different apple cultivars. It was demonstrated that consuming apple with its peel is healthier (in terms of total flavonoid, total phenol, antioxidant activity parameters, and L-ascorbic acid), and drying (especially the sun-drying method) is an effective food storage method for apples.

scholarly journals Influence of Putrescine Application on Storability, Postharvest Quality and Antioxidant Activity of Two Iranian Apricot (Prunus armeniaca L.) Cultivars

2013 ◽  
Vol 5 (2) ◽  
pp. 212-219 ◽  
Author(s):  
Gholamhossein DAVARYNEJAD ◽  
Mehdi ZAREI ◽  
Elham ARDAKANI ◽  
Mohamad Ebrahim NASRABADI
Keyword(s):  
Antioxidant Activity ◽  
Weight Loss ◽  
Ascorbic Acid ◽  
Total Phenolics ◽  
Titratable Acidity ◽  
Maturity Index ◽  
Soluble Solids ◽  
Fruit Firmness ◽  
Postharvest Storage ◽  
Total Soluble Solids

The limited postharvest storage life of apricot is the focus of this study. Presenting a solution to improve the postharvest storage of studied apricot cultivars is the goal. Studding the effect of different concentration of postharvest putrescine on quality attributes and antioxidant activity of two apricot cultivars during storage is the approach taken. The two apricot cultivars (‘Lasgerdi’ and ‘Shahrodi’) were harvested at the commercial ripening stage, and fruits were immerged in 1, 2, 3 and 4 mM putrescine as well as distilled water (control) for 5 min, then fruits were packed in boxes with polyethylene cover and stored at 4°C and 95% relative humidity for 20 days. The changes in weight loss, fruit firmness, total soluble solids, titratable acidity, pH, maturity index, ascorbic acid, total phenolics and antioxidant activity were estimated after 0, 5, 10, 15 and 20 days during storage. The results showed that the weight loss, total soluble solids, pH and maturity index increased significantly while the fruit firmness, titratable acidity, ascorbic acid, total phenolics and antioxidant activity decreased significantly during storage for both cultivars. During storage, a significant difference between control and putrescine treatments in all measured parameters is observed. The putrescine treatments reduced significantly the weight loss and maintained their firmness. In this condition, the highest and lowest of titratable acidity, ascorbic acid, total phenolics and antioxidant activity were observed in treatments of 4 mM putrescine and control, respectively. The data revealed that the quality of apricot fruits was improved by the use of putrescine treatment due to its effect on delaying the ripening processes.

Characterisation and jelly processing potential of different fig cultivars

2019 ◽  
Vol 121 (8) ◽  
pp. 1686-1699
Author(s):  
Paula Nogueira Curi ◽  
Francielly Corrêa Albergaria ◽  
Rafael Pio ◽  
Maria Cecília Evangelista Vasconcelos Schiassi ◽  
Bruna de Sousa Tavares ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Rheological Properties ◽  
Titratable Acidity ◽  
Bioactive Compound ◽  
Physicochemical Characteristics ◽  
Soluble Solids ◽  
Total Phenolic ◽  
Content Type ◽  
Texture Profile

Purpose The purpose of this paper is to characterise eight different fig cultivars with respect to antioxidant activity and bioactive compound content and to assess the influence of these cultivars on the physicochemical characteristics, rheological properties and sensory acceptance of the obtained jelly to identify cultivars with increased potential for processing when grown in subtropical regions. Design/methodology/approach The analyses of fig fruits and fig jellies were performed in triplicate. To characterise the fig cultivars, analyses of antioxidant activity, phenolic compound content and ascorbic acid concentration were performed on fresh fruits. For the jellies, the total titratable acidity, pH, soluble solids, colour, texture profile and sensory attributes were analysed. Findings With respect to antioxidant activity and bioactive compounds, the Roxo de Valinhos displayed the highest antioxidant activity according to the ABTS method, ß-carotene and DPPH; the Três num Prato, Lemon and Brunswick cultivars presented the highest ascorbic acid values; and the Três num Prato cultivar also had the highest total phenolic content. Generally, the various fig cultivars yielded jellies with different physical and chemical characteristics and different rheological properties. This variation did not significantly affect acceptability. This study demonstrates that all of the evaluated cultivars have high potential for processing. Originality/value This study evaluated the processing potential of Roxo de Valinhos and other fig cultivars in the form of jelly, which in view of the food risk concerns of the dried fig, seems to be an interesting alternative for consumption of processed fig.

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