scholarly journals Determination of Thermostability Degree of Lycopene in Watermelon (Citrullus lanatus)

Separations ◽  
2021 ◽  
Vol 8 (11) ◽  
pp. 220
Author(s):  
Bohuslava Tremlova ◽  
Hana Koudelkova Mikulaskova ◽  
Tomas Pencak ◽  
Karolina Tesikova ◽  
Simona Dordevic ◽  
...  
Keyword(s):  
Bioactive Compounds ◽  
Citrullus Lanatus ◽  
Antioxidant Properties ◽  
Control Sample ◽  
Polyphenol Content ◽  
Total Polyphenol ◽  
Total Polyphenol Content ◽  
Heat Treated ◽  
Heating Treatment ◽  
Lycopene Content

The aim of the work was to determine the degree of watermelon (Citrullus lanatus) thermostability according to the content of the present bioactive compounds and antioxidant properties. The watermelon samples were exposed to the following temperatures/time regimes: 40, 70, and 100 °C; 2, 5, and 15 min. The sample characteristics were monitored by spectrophotometric and chromatographic methods. Statistically significant (p < 0.05) differences were observed between the heat-treated samples compared to the heat-untreated control sample; differences were found almost between all samples. The total polyphenol content increased in all heat-treated samples. The highest total polyphenol content was observed among samples treated at 40 °C for 15 min (1.38 ± 0.01 mg/g). Lycopene content (measured by spectrophotometer) also increased in the same samples exposed to 40 °C for 5 min (65.45 ± 0.20 mg/kg), though higher temperatures (70 and 100 °C) resulted in lycopene degradation. Chromatographic method (measured by high-pressure liquid chromatography) showed lycopene degradation after each heating treatment. Not unambiguously, results and observations were not found in antioxidant activity due to oscillations in measured bioactive compounds. The obtained results emphasize processes in heat-treated watermelon, and they can be useful in the production of different products where this food commodity can be included.

scholarly journals The Quality of Ciders Depends on the Must Supplementation with Mineral Salts

Molecules ◽  
2020 ◽  
Vol 25 (16) ◽  
pp. 3640
Author(s):  
Tomasz Tarko ◽  
Magdalena Januszek ◽  
Aneta Pater ◽  
Paweł Sroka ◽  
Aleksandra Duda-Chodak
Keyword(s):  
Antioxidant Properties ◽  
Control Sample ◽  
Yeast Cells ◽  
Polyphenol Content ◽  
Mineral Salts ◽  
Total Polyphenol ◽  
Total Polyphenol Content ◽  
Yeast Strains ◽  
Magnesium Salts ◽  
The Impact

Providing yeast with the right amount of mineral salts before fermentation can contribute to improving the entire technological process, resulting in a better-quality final product. The aim of this study was to assess the impact of apple must supplementation with mineral salts ((NH4)2SO4, MgSO4, (NH4)3PO4)) on enological parameters, antioxidant activity, total polyphenol content, and the profile of volatile cider compounds fermented with various yeast strains. Rubin cultivar must was inoculated with wine, cider, and distillery or wild yeast strains. Various mineral salts and their mixtures were introduced into the must in doses from 0.167 g/L to 0.5 g/L. The control sample consisted of ciders with no added mineral salts. The basic enological parameters, antioxidant properties, total polyphenol content, and their profile, as well as the composition of volatile compounds, were assessed in ciders. Must supplementation with magnesium salts significantly influenced the use of the analyzed element by yeast cells and was dependent on the yeast strain. In supplemented samples, a decrease in alcohol concentration and total acidity, as well as an increase in the content of extract and total polyphenols, was observed compared to the controls. The addition of ammonium salts caused a decrease in the amount of higher alcohols and magnesium salts, as well as a decrease in the concentration of some esters in ciders.

scholarly journals Changes of antioxidant activity and active compounds content in selected teas

2020 ◽  
Vol 8 (1) ◽  
pp. 91-97
Author(s):  
Barbara Kolodziej ◽  
Sugier Danuta ◽  
Luchowska Katarzyna
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Properties ◽  
Ferric Ions ◽  
Polyphenol Content ◽  
Total Polyphenols ◽  
Total Polyphenol ◽  
Total Polyphenol Content ◽  
Tea Infusions ◽  
Anti Oxidant ◽  
Brewing Time

Our study tested 45 tea infusions classified into five groups (white, green, red, black, and other teas) for the content of total polyphenols and flavonoids, as well as antioxidant properties, by the FRAP and DPPH methods. We examined these parameters after prolongation of the brewing time from 10 to 30 min and overnight storage. The results showed that the capacity of the teas to bind free radicals was differentiated and the amount of anti-oxidant compounds depended on their nature. In terms of antioxidant activity and total polyphenol content, the tested tea types were ranked in the following order: white > green > black > red > other teas (yerba mate > rooibos). Our experiment demonstrated a positive correlation between the polyphenol content and antioxidant activity of the analyzed teas. Also, the DPPH antiradical efficiency was comparable to their ability to reduce ferric ions. The extended brewing time had a significant effect on the antioxidant activity of the infusions and the polyphenolic compounds analyzed therein. In contrast, storage of the infusions for 24 h at room temperature changed their antioxidant activity and affected the total polyphenol content.

scholarly journals Bioactive and Antimicrobial Properties of Eggplant (Solanum melongena L.) under Microwave Cooking

2021 ◽  
Vol 13 (3) ◽  
pp. 1519
Author(s):  
Ahmad Mohammad Salamatullah ◽  
Mohammed Saeed Alkaltham ◽  
Khizar Hayat ◽  
Mohammed Asif Ahmed ◽  
Shaista Arzoo ◽  
...  
Keyword(s):  
Fruits And Vegetables ◽  
Control Sample ◽  
Solanum Melongena ◽  
Antimicrobial Properties ◽  
Reducing Power ◽  
Polyphenol Content ◽  
Total Polyphenol ◽  
Microwave Cooking ◽  
Total Polyphenol Content ◽  
Antimicrobial Potential

Fruits and vegetables constitute a considerable amount of antioxidants and among them eggplant is a rich source of polyphenol compounds. This study investigated the bioactive and antimicrobial properties of eggplant under different degree of microwave cooking. The eggplant was cooked for 7 min (light cooked), 10 min (medium cooked), and 15 min (high cooked). The highest total polyphenol content was observed in the light cooked eggplant sample (27.35 mg gallic acid equivalent (GAE)/g dry weight (DW)) followed by high cooked sample (26.10 mg GAE/g DW), while the lowest total polyphenol content (2.79 mg GAE/g DW) was obtained for the uncooked (control) sample. The total polyphenol content of the samples ranged in the following order; light cooked > high cooked > medium cooked > uncooked. The 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging of eggplant ranged between 16.16% (control) and 47.88% (high cooked). The highest reducing power was exhibited by the light cooked (absorbance 1.708) eggplant sample followed by the high cooked (absorbance 1.597), while the lowest reducing power was shown by uncooked sample (absorbance 0.389). Moreover, antimicrobial studies showed that light cooked eggplant sample demonstrated broad-spectrum inhibition of growth in Gram-positive as well as Gram-negative bacteria and Candida albicans. Slightly lower antimicrobial potential was exhibited by medium cooked eggplant sample while no antibacterial or antifungal activity was recorded for the extract of high cooked eggplant sample. Microwave cooking might be a method to enhance the antioxidant and antimicrobial potential of eggplant.

scholarly journals Comparison of Bioactive Substances Content between Commercial and Wild-Type Isolates of Pleurotus eryngii

2021 ◽  
Vol 13 (7) ◽  
pp. 3777
Author(s):  
Antonella Calabretti ◽  
Stefania M. Mang ◽  
Antonella Becce ◽  
Donato Castronuovo ◽  
Loriana Cardone ◽  
...  
Keyword(s):  
Bioactive Compounds ◽  
Antiradical Activity ◽  
Wild Type ◽  
Polyphenol Content ◽  
Bioactive Substances ◽  
Total Polyphenol ◽  
Total Polyphenol Content ◽  
Basilicata Region ◽  
Medicinal Value ◽  
Regular Intake

Mushrooms belonging to Pleurotus genus have been demonstrated to have important nutritional and medicinal value and their regular intake prevent many diseases, reduce the infection probability and increase immunity. In order to investigate the bioactive compounds produced by seven commercial (‘142 F’, ‘142 E’, ‘D+’, ‘V turbo’, ‘V 142’, ‘A 12’, ‘V 160’) and five wild-type (‘Albino 1107’, ‘Altamura 1603’, ‘Muro Lucano 139’, ‘Conversano 1250’, ‘Albino beige chiaro 1094’) P. eryngii isolates, the following qualitative analyses were performed: Total polyphenol content, antioxidant activity (EC50 of ABTS) and antiradical power (ARP) in fresh lyophilized and dry basidioma, and water content, β-glucans and phenolic compounds in fresh samples. Standard methods were employed for each of the above mentioned aims. Total polyphenol content was diverse among the P. eryngii isolates. In particular, an elevated polyphenolic content was found in fresh lyophilized P. eryngii samples of the commercial isolates ‘V 142’ followed by ‘A 12’. The highest antiradical activity (ARP) was obtained by ‘Muro Lucano 139’ isolate. Wild P. eryngii isolates were characterized by higher water and β-glucans contents compared to the commercial ones, and the highest values were registered for the ‘Albino beige chiaro 1094’ isolate. In conclusion, the present study allowed us to identify the commercial and wild-type P. eryngii isolates from the Basilicata region, with high nutritional and medicinal value based on their bioactive compounds.

scholarly journals In vitro antioxidant activity of honeydew and multifloral types of honey from Serbia

2013 ◽  
pp. 269-277 ◽  
Author(s):  
Zoran Maksimovic ◽  
Nebojsa Nedic
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Properties ◽  
Geographic Origin ◽  
Radical Scavenging ◽  
Colour Intensity ◽  
Polyphenol Content ◽  
Total Polyphenol ◽  
Antioxidant Power ◽  
Total Polyphenol Content ◽  
Ferric Reducing Antioxidant Power

Antioxidant properties of fifteen multifloral and honeydew types of honey from Serbia were assessed by determination of ferric-reducing antioxidant power (FRAP assay) and 2,2- diphenyl-1-picrylhydrazyl free radical scavenging ability (DPPH assay), with respect to their total polyphenol content and colour intensity. The results of this study showed that total polyphenol content, antioxidant activity and colour intensity varied widely among different samples, even within the same type of honey. All investigated parameters were strongly dependent on geographic origin of samples, further emphasizing the importance of their detailed chemical characterisation. In general, polyphenolic content in investigated samples of honey, expressed as catechin equivalents, ranged from 480.2 to 1861.1 mg/kg. The ferric-reducing antioxidant power of honey tended to be lower in brighter and higher in darker samples, varying between 489.6 and 3089.8 ?mol Fe(II) per 100 g of honey. The correlation between the colour and antioxidant activity never reached statistical significance in the case of honeydew type of honey, which was opposed to a trend observed in the case of multifloral honey.

scholarly journals Implementation of chemometric techniques for evaluation of antioxidant properties of Camellia sinensis extracts

2014 ◽  
Vol 12 (6) ◽  
pp. 700-710 ◽  
Author(s):  
Joanna Ronowicz ◽  
Bogumiła Kupcewicz ◽  
Elżbieta Budzisz
Keyword(s):  
Antioxidant Activity ◽  
Camellia Sinensis ◽  
Antioxidant Properties ◽  
Cation Radical ◽  
Polyphenol Content ◽  
Data Set ◽  
Total Polyphenol ◽  
Total Polyphenol Content ◽  
Radical Method ◽  
Chemometric Techniques

AbstractIn this study, antioxidant properties of commercial green teas and dietary supplements containing Camellia sinensis extracts were evaluated. Extracts were examined using two antioxidant assays (DPPH· radical method and ABTS·+ cation radical method). A Folin-Ciocalteu assay was used to evaluate the total polyphenol content in the extracts. In order to compare and characterize the investigated Camellia sinensis extracts, chemometric techniques based on fingerprint chromatograms, antioxidant activity and total polyphenol content were applied. Application of chemometric methods allowed for reduction of multidimensionality of the data set and grouped the samples into differentiable clusters. The relationship between the antioxidant activity and total polyphenol content was also assessed. The results indicated that extracts with the higher polyphenolic content exhibited the stronger antiradical activity against both DPPH· radicals and ABTS·+ cation radicals. The multivariate calibration technique (such as a tree regression algorithm) can be a useful tool for rapid determining the antioxidant activity of a herbal product based on its fingerprint chromatogram

scholarly journals The Effects of Dietary Inclusion of Bilberry and Walnut Leaves in Laying Hens’ Diets on the Antioxidant Properties of Eggs

Animals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 191 ◽  
Author(s):  
Arabela Elena Untea ◽  
Iulia Varzaru ◽  
Tatiana Dumitra Panaite ◽  
Teodor Gavris ◽  
Alexandra Lupu ◽  
...  
Keyword(s):  
Laying Hens ◽  
Antioxidant Properties ◽  
Egg Yolk ◽  
Oxidation Products ◽  
Polyphenol Content ◽  
Total Polyphenol ◽  
Total Polyphenol Content ◽  
Egg Yolks ◽  
Dietary Treatments ◽  
Primary Oxidation

The purpose of this study was to examine the effects of dietary inclusion of walnut and bilberry leaves (WL and BL), as sources of natural antioxidants in poultry diets, on the enrichment of antioxidant nutrients in the egg yolk and on the susceptibility of the yolk to lipid peroxidation during storage. The experiment was conducted on 32-week-old TETRA SL LL laying hens, which were assigned to three dietary treatments with 30 birds each. Each treatment was replicated 10 times with three chicks per replicate pen. Experimental dietary treatments differed from control diet (C) by addition of 0.5% BL supplement or 1% WL supplement. The phytoadditives were not significant contributors to the productive parameters. The addition of BL and WL in laying hens’ diets significantly increased the total polyphenol content, and the zinc, lutein and zeaxanthin concentrations in the egg yolks. In regards to the oxidative stability parameters, a significant decrease in the concentrations of primary oxidation products formed in the egg yolk of experimental groups was seen, proving an efficient inhibition effect of the phytoadditives on peroxyl radical formation. A significant correlation was observed between primary oxidation products and total polyphenol content of the egg yolks, where zinc, lutein and zeaxanthin are the bioactive compounds that inhibit the formation of secondary oxidation products.

scholarly journals Extraction of Bioactive Compounds from Two Grape Varieties Using Pulsed Electric Field

2016 ◽  
Vol 73 (2) ◽  
pp. 85
Author(s):  
Simona Ioana VICAS ◽  
Livia BANDICI ◽  
Alin Cristian TEUSDEA ◽  
Gheorghe Emil BANDICI
Keyword(s):  
Electric Field ◽  
Antioxidant Capacity ◽  
Bioactive Compounds ◽  
Total Flavonoid ◽  
Total Flavonoid Content ◽  
Flavonoid Content ◽  
Polyphenol Content ◽  
Total Polyphenol ◽  
Total Polyphenol Content ◽  
Grape Varieties

In this paper, our objective was to investigate extraction efficiency of polyphenols with antioxidant capacity from two varieties of grapes (white-Muscat Ottonel (MO) and red-Pinot Noir (PN)) using pulsed electric field (PEF). Grapes were harvested in the Crisana Santimreu vineyard in 2015. The grapes were declustered and crushed, and have been divided into three parts. A part was treated in PEF, the second one was homogenized, and then was treated in PEF and the last part remained untreated, representing the control samples. The bioactive compounds, like total polyphenol content and total flavonoid content, were determined by the spectrophotometric method. The antioxidant capacity of the samples was determined by three methods (DPPH, FRAPand TEAC). Our results show that the application of PEF to the crushed grapes increases the total polyphenol content 2.28 and 3.15 times and the total flavonoid content 7.17 and 5.29 times for MO and PN, respectively. Also, the antioxidant capacity was significantly increased when it was compared with the control sample. When the treatment in PEF was applied on homogenized grapes both bioactive compounds and antioxidant capacity were significantly increased compared to the samples treated in PEF for crushed grapes. In the present research work, we demonstrated that the application of PEF to two different grape varieties significantly increased the level of total polyphenols and flavonoids and also the antioxidant capacity. The application of PEF to homogenized grapes was more efficient.

The levels of bioactive compounds found in raw and cooked Canadian pulses

2020 ◽  
pp. 108201322097380
Author(s):  
AK Stone ◽  
KN Waelchli ◽  
B Çabuk ◽  
TC McIntosh ◽  
J Wanasundara ◽  
...  
Keyword(s):  
Bioactive Compounds ◽  
Faba Bean ◽  
Polyphenol Content ◽  
Total Polyphenol ◽  
Total Polyphenol Content ◽  
Total Saponin ◽  
Wide Range ◽  
Different Types ◽  
Faba Beans

The effect of cooking on the levels of bioactive compounds (oligosaccharides, polyphenols and saponins, and vicine/convicine for faba bean only) were examined in a wide range of Canadian pulses. The total oligosaccharide concentrations were reduced ∼40% for chickpea, 11–81% for lentils, 41–43% for faba beans, 10–51% for beans, and 20–44% for peas. Individual oligosaccharides, raffinose, ciceritol, stachyose and verbascose, increased or decreased in the cooked samples depending on each pulse sample. Cooking reduced the total polyphenol content by 13–25% for chickpeas, 0–83% for lentils, 47–54% for faba beans, 47–54% for beans, and 48–70% for peas. And, the total saponin concentrations were reduced by 11–30% for chickpeas, 0–40% for lentils, 32–46% for beans, 14–30% for peas and increased by 8–26% in faba bean. The vicine and convicine levels in faba bean were reduced by 26–38% with cooking. The reduction in bioactive compounds after cooking depended on the specific compound and specific type of pulse. This large analyses of 20 different pulse samples allows for comparison between and within different types of pulses.

scholarly journals Effect of NPK fertilization on the chemical properties and bioactive compounds of the cabezona pineapple fruit

2021 ◽  
Author(s):  
Juventino Pérez-Romero ◽  
Sergio Salgado García ◽  
L. del Carmen Lagunes-Espinoza ◽  
Samuel Córdova-Sánchez ◽  
C. Fredy Ortiz-García
Keyword(s):  
Ascorbic Acid ◽  
Citric Acid ◽  
Bioactive Compounds ◽  
Chemical Properties ◽  
Total Flavonoid ◽  
Polyphenol Content ◽  
Total Polyphenol ◽  
Total Polyphenol Content ◽  
Pineapple Fruit ◽  
Npk Fertilization

Objective: To evaluate the effect of NPK fertilization on the chemical properties and bioactive compounds of the cabezona pineapple fruit. Design/methodology/approach: 15 NPK fertilization treatments were evaluated and carried out in the field in a random complete block design with four repetitions per treatment. At the end of the crop cycle, we determined the pH, °Brix and citric acid % of the fruits that were harvested, following the methodology established in NMX-FF-028 and 011. The pH of the juice was measured directly using a potentiometer. Ascorbic acid was measured with a SIGMA-ALDRICH® kit, the total polyphenol contents were determined following the methodology of De la Cruz-Ricardez et al. (2020), while total flavonoid contents were measured following a modified version of the methodology proposed by Hossain et al. (2011). Results: The mean values for °Brix, citric acid %, and pH were 7.3, 7.1 and 3.4 respectively, without significant differences between treatments. A highly significant difference in the concentration of ascorbic acid was observed between treatments; treatment three had the highest concentration (19.4 mg 100 g-1 FF). There were no significant differences between the fertilization treatments and the control, regarding total polyphenol content (41.34 mg 100 g-1 FF) and flavonoids (1.6 mg 100 g-1 FF) concentrations. Study limitations/implications: The ripening degree of the pineapple fruit directly influences the chemical properties and the concentration of bioactive compounds. Findings/conclusions: NPK fertilization had no effect on °Brix and pH. The citric acid percentage and the total polyphenol content increased as the doses of P2O5 increased. The ascorbic acid concentration and total flavonoid content are not affected by the NPK fertilization dose.

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