scholarly journals Antioxidant properties of different pectin-containing solutions

2019 ◽  
Vol 80 (4) ◽  
pp. 199-202
Author(s):  
A. A. Ashinova
Keyword(s):  
Antioxidant Activity ◽  
Aqueous Solutions ◽  
Life Support ◽  
Antioxidant Properties ◽  
Environmental Safety ◽  
Radical Oxidation ◽  
Aldehydes And Ketones ◽  
Molecular Compounds ◽  
Predominant Effect ◽  
Pectin Substances

At the present stage, the tasks of state policy is to preserve the functions of life support for the stable development of society, improving the health of the population, ensuring environmental safety of the country. Antioxidant activity is manifested in the ability of substances to delay the radical oxidation of organic and high-molecular compounds, and thereby reduce the yield of alcohols, hydroperoxides, fatty acids, aldehydes and ketones. Pectin substances are contained in all plants and some algae and are able to exhibit antioxidant activity. The article presents the study of antioxidant activity of pectin-containing solutions. To determine the antioxidant activity, aqueous solutions of pectin substances of Apple, citrus, beet pectin, their combinations with a concentration of 1% were prepared. According to the obtained data, the value of antioxidants for aqueous solutions of pectin substances and their combinations was calculated. According to the diagram of antioxidant activity of aqueous solutions of pectin substances and their combinations. An increase in antioxidant activity in the combination of Apple and citrus pectins with beet, which is explained by the influence of beet pectin on the properties of substances combined with it. Apple pectin does not increase antioxidant activity in combination with citrus pectin, due to its chemical and physiological form. The ability of pectins to show antioxidant activity depending on the combination of pectins is proved. It was found that the most antioxidant activity has an aqueous solution of beet pectin. Moreover, there is an increase in antioxidant activity when combining Apple and citrus pectins with beet, which is explained by the predominant effect of beet pectin on this indicator.

VARIETAL FEATURES OF TUBERS OF JERUSALEM ARTICHOKE, GROWING IN THE KRASNODAR REGION AND THE Adygea Republic

2019 ◽  
Author(s):  
Н.Т. Шамкова ◽  
В.Ю. Токарев ◽  
А.В. Добровольская ◽  
А.З. Тодорова ◽  
А.И. ВЕРЕЩАГИНА
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Orotic Acid ◽  
Antioxidant Properties ◽  
Jerusalem Artichoke ◽  
Biotechnological Potential ◽  
Total Sugars ◽  
Krasnodar Region ◽  
Public Catering ◽  
Pectin Substances

Определен биотехнологический потенциал топинамбура сортов Новость ВИР, Скороспелка, Интерес, произрастающего в Краснодарском крае и Республике Адыгея, урожаев 2011 2018 гг. Установлено, что клубни топинамбура сорта Интерес превосходят сорта Новость ВИР и Скороспелка по содержанию, : общих сахаров на 22,41 и 14,34 инулина 41,82 и 32,99 пектиновых веществ 22,39 и 49,75 аскорбиновой кислоты 35,27 и 39,29 хлорогеновой кислоты 3,66 и 18,29 оротовой кислоты 88,89 и 84,89 соответственно. Сорт Интерес в сравнении с сортами Новость ВИР и Скороспелка содержит на 245,24 и 243,33 меньше никотиновой кислоты и на 100,0 и 108,33 кофейной кислоты соответственно. Содержание гистидина в клубнях топинамбура сортов Интерес, Новость ВИР и Скороспелка составляет 132,36 44,83 и 88,21 мг/кг аргинина 2017,2 958,56 и 460,44 мг/кг соответственно. В комплексе с аскорбиновой кислотой органические кислоты клубней топинамбура обладают выраженными антиоксидантными свойствами. Установлено, что в результате бланширования антиоксидантная активность топинамбура сорта Интерес возросла на 15,6. Таким образом, сорт Интерес наиболее перспективен для переработки в условиях предприятий общественного питания. The biotechnological potential of Jerusalem artichoke varieties Novost VIR, Skorospelka, Interes growing in the Krasnodar region and the Adygea Republic, harvest 2011 2018 has been determined. It was found that Jerusalem artichoke tubers of the Interes variety are superior to Novost VIR and Skorospelka varieties in content, : total sugars by 22,41 and 14,34 inulin 41,82 and 32,99 pectin substances 22,39 and 49,75 ascorbic acid 35,27 and 39,29 chlorogenic acid 3,66 and 18,29 orotic acid 88,89 and 84,89, respectively. Variety Interes in comparison with Novost VIR and Skorospelka varieties contains 245,24 and 243,33 less nicotinic acid and 100,00 and 108,33 coffee acid, respectively. The content of histidine in the tubers of Jerusalem artichoke varieties of Interes, Novost VIR, Skorospelka is 132,36 44,83 and 88,21 mg/kg arginine 2017,2 958,56 and 460,44 mg/kg, respectively. In a complex with ascorbic acid, organic acids of Jerusalem artichoke tubers have pronounced antioxidant properties. It was found that as a result of blanching, the antioxidant activity of Jerusalem artichoke of the Interes variety increases by 15,6. Thus, the Interes variety is most promising for processing in public catering facilities.

scholarly journals Research of antioxidant properties of grape marc extracts as perspective pharmaceutical and cosmetic products

2020 ◽  
Vol 3 (2) ◽  
pp. 79-84
Author(s):  
A. R. Skira ◽  
◽  
O. S. Iaremkevych ◽  
N. L. Zayarnyuk ◽  
M. S. Kurka ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Properties ◽  
Liver Homogenate ◽  
Heat Bath ◽  
Free Radical Oxidation ◽  
Ethanol Extract ◽  
Vitis Vinifera L ◽  
Cosmetic Products ◽  
Radical Oxidation ◽  
Grape Marc

The antioxidant activity (AA) of various extracts of grape marc (Vitis vinifera L.) was studied. Radical absorption activity (RAA) was calculated in reactions with DPPH+ and ABTS•+ radicals and AA in rat liver homogenate by two markers of oxidative stress (OS): contents of thiobarbiturative products and carbonyl groups of proteins. All the extracts showed antioxidant activity. Water-based extract and 96 % ethanol extract obtained via heat bath method were inhibitors of the formation of free radical oxidation of lipids and proteins. 96% ethanol extract is promising for the development of pharmaceutical and cosmetic products.

scholarly journals UJI AKTIVITAS ANTIOKSIDAN EKSTRAK ETANOL DAUN BUAS-BUAS (Premna serratifolia L.) ASAL KABUPATEN MELAWI PROVINSI KALIMANTAN BARAT DENGAN METODE DPPH

2020 ◽  
Vol 3 (2) ◽  
pp. 405-412
Author(s):  
Weni Puspita ◽  
◽  
Dina Yuspita Sari ◽  
Ika Ristia Rahman ◽  
Keyword(s):  
Antioxidant Activity ◽  
Free Radicals ◽  
Free Radical ◽  
Cell Damage ◽  
Antioxidant Properties ◽  
Free Radical Oxidation ◽  
The Body ◽  
Radical Oxidation ◽  
Ic50 Values ◽  
Ethanol Extracts

Buas (Premna serratifolia L.) contains secondary metabolites of flavonoids, saponins, tannins and triterpenoids/steroids, where flavonoids are known to have antioxidant properties and counteract free radicals. Antioxidants are compounds that can fight toxic hazards and reduce cell damage to the body caused by free radical oxidation. The purpose of this study was to determine the antioxidant activity of ethanol extracts of buas-buas leaves was carried out by DPPH (2,2-diphenyl-1-picrylhydrazyl), using UV-Vis spectrophotometry at wavelength 518.40 nm with various concentrations of 10 ppm, 20 ppm, 30 ppm, 40 ppm and 50 ppm. The results showed that Buas Buas leaves (Premna serratifolia L.) had an antioxidant activity with IC50 values ??of 20.66 ug / mL.

scholarly journals A Study of the Antioxidant, Cytotoxic Activity and Adsorption Properties of Karelian Shungite by Physicochemical Methods

Antioxidants ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1121
Author(s):  
Liubov Skrypnik ◽  
Olga Babich ◽  
Stanislav Sukhikh ◽  
Olga Shishko ◽  
Svetlana Ivanova ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Low Cost ◽  
Antioxidant Properties ◽  
Size Fraction ◽  
Antibacterial Properties ◽  
Maximal Activity ◽  
Environmental Safety ◽  
Quantitative Composition ◽  
Amperometric Method ◽  
Forms Of Carbon

This study reveals that fossil shungite samples exhibit antioxidant activity, can reduce oxidized components, and bind to free radicals. A sample of Sh20 (size fraction—20 μm) (1.30 mg equivalents of ascorbic acid/g of shungite; 3.46 mg equivalents of trolox/g of shungite; 0.99 mg equivalents of quercetin/g of shungite) had the maximal activity according to the amperometric method. The obtained data indicate that shungite has antioxidant properties, but these are approximately 1000 times less pronounced than those of quercetin. A ShT20 sample (size fraction—20 μm + heat treatment) was found to have the highest antioxidant activity against the 2,2-diphenyl-1-picrylhydrazyl radical and cytotoxicity. Further studies, including the optimization of the antioxidant extraction conditions of shungite, and the analysis of the qualitative and quantitative composition of the obtained extracts, are required for a more accurate interpretation of the results. Shungite can be applied as an alternative to activated carbon in water purification, due to its absorption, catalytic, antioxidant, regenerating, and antibacterial properties, as well as its high environmental safety and relatively low cost. It is possible to identify new structural forms of carbon within, and other valuable properties of, shungite substance, which will make it possible to create effective technologies for the practical use of shungite rocks, particularly in the production of fullerenes and other carbon nanoclusters.

Study of the quality and antioxidant properties of tomatoes (Solanum lycopersicum L.) under different postharvest and dehydration conditions

2020 ◽  
Vol 13 (9) ◽  
Author(s):  
María Lorena Luna-Guevara ◽  
Teresita González-Sánchez ◽  
Adriana Delgado-Alvarado ◽  
María Elena Ramos-Cassellis ◽  
José Guillermo Pérez-Luna ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Rural Communities ◽  
Antioxidant Properties ◽  
Titratable Acidity ◽  
Physicochemical Characteristics ◽  
Soluble Solids ◽  
Convective Drying ◽  
Tomato Fruits ◽  
Solanum Lycopersicum L ◽  
Storage Temperatures

Objective: To study the effect of storage temperatures and dehydration conditions (solar and convective drying; SD, CD), on the quality, physicochemical parameters and antioxidant properties of tomato fruits. Methodology: The physicochemical characteristics pH, titratable acidity, soluble solids (°Bx) and color parameters (L*, a* and b*), were evaluated. The lycopene, carotenoids and antioxidant activity percentages retention of tomatoes fruits stored at 7 and 22 ° C for 5 days and subjected to SD (Temperature (T) of 67 °C and luminescence of 685 lum/sqf) and CD (T 70 °C, flow rates 0.5, 1.0 and 1.5 m/s), were analyzed. Results: The fruits reached humidities of 17 and 15% for SD and CD. The parameters pH, °Bx, L*, a*, b* were highest with 22°C and CD (1.5 m/s). The value of the carotenoids was higher in fruits stored at 7 ° C and subjected to CD (1.0 and 1.5 m/s) and SD with values of 83.85, 85.98 and 99.43%, respectively. The CD (0.5 m/s) and SD improved lycopene (94.37 and 95.14%) and the antioxidant activity with values of 73.06 and 97.21%. Implications: The application of solar dehydration depends on luminescence condition; however, it is inexpensive and environmentally friendly alternative. Conclusions: The results derived in a viable alternative for the conservation and commercialization of tomato fruits in rural communities

Antioxidant activity of cookiessupplemented with sugarbeet dietary fiber

2011 ◽  
pp. 151-157 ◽  
Author(s):  
Marijana B. Saka ◽  
Julianna F. Gyura ◽  
Aleksandra Mišan ◽  
Zita I. Šereš ◽  
Biljana S. Pajin ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Shelf Life ◽  
Dietary Fiber ◽  
Wheat Flour ◽  
Room Temperature ◽  
Antioxidant Activities ◽  
Radical Scavenging Activity ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Functional Characteristics

The antioxidant activity of cookies prepared by the addition of sugarbeet dietary fibers was investigated in order to estimate their influence on functional characteristics and shelf-life of cookies. Treated fiber (TF) was obtained from sugarbeet by extraction with sulfurous acid (75 °C at pH = 5.7during 60 min) and treatment with hydrogen peroxide (20 g/LH2O2 at pH = 11 during 24 h). The fiber obtained was dried (80 °C), ground and sieved. TF was investigated in comparison with commercially available Fibrex®. The cookies were prepared by the addition of 0, 7, 9 and 11% of sugarbeet dietary fiber as a substitute for wheat flour in the formulation of cookies. The antioxidant properties of cookies were tested every 7 days using a DPPH (1,1-diphenyl-2-picrylhydrazyl) radical scavenging activity test during 6 weeks of storage at room temperature (23 ± 1 ºC). The obtained results indicated that substitution of wheat flour with Fibrex® in the formulation of cookies upgraded the antioxidant activity, i.e. the functional characteristics of Fibrex®-enriched cookies and could prolong their shelf-life. In contrast, TF did not increase the antioxidant activity of TF-enriched cookies. The better antioxidant activities of Fibrex®-enriched cookies could be attributed to the presence of ferulic acid.

Evaluation of diuretic and antioxidant properties in aqueous bark and fruit extracts of pine

2020 ◽  
Vol 17 ◽  
Author(s):  
Hadi Shariati ◽  
Mohammad Hassanpour ◽  
Gholamreza Sharifzadeh ◽  
Asghar Zarban ◽  
Saeed Samarghandian ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Content ◽  
Antioxidant Properties ◽  
Pine Bark ◽  
Male Rats ◽  
Total Phenolic ◽  
Dependent Manner ◽  
Aqueous Extracts ◽  
Antioxidant Power ◽  
Dose Dependent

Objective: The present study has been carried out to evaluate the diuretic and antioxidant properties of pine herb in an animal model. Materials and Methods: 45 adult male rats were randomly divided into nine groups including: groups I (the negative control), groups II (positive control, furosemide 10 mg/kg), groups III to VIII (treatment groups received 100, 200, 400 mg/kg of the aqueous extracts of bark and fruit) and group IX received the combination of aqueous extract of bark (100 mg/kg) and the fruit (100 mg/kg). The urine output, glomerular filtration rate (GFR), electrolytes, urea, and creatinine levels were evaluated . Furthermore, the phenolic content and antioxidant activity of both extracts were also assessed using 2, 2-diphenyl-1-picrylhydrazyl (DPPH), ferric reducing antioxidant power (FRAP) and Folin–Ciocalteu methods. Results: The aqueous extracts of the pine bark and fruit increased the urinary output in a dose-dependent manner. The combination of the two extracts compared to the other extracts alone significantly increased the serum potassium level. This study also showed each extract increase creatinine clearance in a dose-dependent manner (p<0.01 and p<0.05). The increase of GFR in the combination group was not significant. The current data showed a significant increase in the total phenolic content in pine bark extract in compared with the fruit extract. Conclusion: The pine bark and fruit can be useful in the prevention and treatment of kidney stones due to the high antioxidant activity.

Effects of Greek Pomegranate Extracts in the Antioxidant Properties and Storage Stability of Kefir

2019 ◽  
Vol 15 (4) ◽  
pp. 437-441 ◽  
Author(s):  
Vasiliki Lagouri ◽  
Georgia Dimitreli ◽  
Aikatarini Kouvatsi
Keyword(s):  
Antioxidant Activity ◽  
Dairy Products ◽  
Storage Time ◽  
Storage Stability ◽  
Flow Behavior ◽  
Antioxidant Properties ◽  
Flow Behavior Index ◽  
Ph Values ◽  
Dpph Activity ◽  
Behavior Index

Background: Oxidation reactions are known to shorten the shelf life and cause damage to foods rich in fat, such as dairy products. One way to limit oxidation and increase the shelf life of fermented dairy products is to use natural antioxidants. The aim of this study was to examine the effect of adding pomegranate extracts in the antioxidant properties, rheological characteristics and the storage stability of the fermented product of kefir. Methods: The Pomegranate Juice (PGJ) and Peel Extracts (PGPE) (5%, 10% w/v) were added to kefir and the antioxidant properties were evaluated by using the methods of radical scavenging activity (DPPH) and Ferric Reducing Antioxidant Power Activity (FRAP). Spectrophotometric and instrumental methods were used to determine the Total Phenols (TPs), pH values, viscosity and flow behavioral index values of enriched with pomegranate kefir samples. The same properties were tested when kefir samples stored at 4°C for 7, 14, 21 and 28 days. Results: The addition of PGJ and PGPE results in an increase in the antioxidant activity (DPPH, FRAP) and total phenol content (TPs) of kefir samples. Increasing the concentration of the added PGJ and PGPE, results in an increase in the TP content and the DPPH activity of kefir. As far as the storage time is concerned, the results showed an increase in the amount of TP at 7th day and a reduction in the DPPH activity in the 14th day of storage. In contrary to the DPPH method, the increase in storage time has resulted in a reduction in antioxidant activity by the FRAP method. The addition of PGJ and PGPE in kefir results in a decrease in pH values while the pH of kefir samples increased during storage at 4°C for 28 days. The addition of PGJ and PGPE to kefir samples results to a decrease in viscosity and an increase in the flow behavior index. Increasing storage time results in increased flow behavior index of kefir samples. Conclusion: The addition of PGJ and PGPE increased the antioxidant activity and total phenols of the kefir product and preserved its properties during the total storage time of 28 days at 4°C.

scholarly journals Effect of particle size on phytochemical composition and antioxidant properties of Sargassum cristaefolium ethanol extract

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
E. S. Prasedya ◽  
A. Frediansyah ◽  
N. W. R. Martyasari ◽  
B. K. Ilhami ◽  
A. S. Abidin ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Particle Size ◽  
Antioxidant Activities ◽  
Antioxidant Properties ◽  
Ethanol Extract ◽  
Total Phenolic ◽  
Particle Sizes ◽  
Epicatechin Gallate ◽  
Particle Size Reduction ◽  
Phytochemical Composition

AbstractSample particle size is an important parameter in the solid–liquid extraction system of natural products for obtaining their bioactive compounds. This study evaluates the effect of sample particle size on the phytochemical composition and antioxidant activity of brown macroalgae Sargassum cristaefolium. The crude ethanol extract was extracted from dried powders of S.cristeafolium with various particle sizes (> 4000 µm, > 250 µm, > 125 µm, > 45 µm, and < 45 µm). The ethanolic extracts of S.cristaefolium were analysed for Total Phenolic Content (TPC), Total Flavonoid Content (TFC), phenolic compound concentration and antioxidant activities. The extract yield and phytochemical composition were more abundant in smaller particle sizes. Furthermore, the TPC (14.19 ± 2.08 mg GAE/g extract to 43.27 ± 2.56 mg GAE/g extract) and TFC (9.6 ± 1.8 mg QE/g extract to 70.27 ± 3.59 mg QE/g extract) values also significantly increased as particle sizes decreased. In addition, phenolic compounds epicatechin (EC), epicatechin gallate (ECG), epigallocatechin (EGC), and Epigallocatechin gallate (EGCG) concentration were frequently increased in samples of smaller particle sizes based on two-way ANOVA and Tukey’s multiple comparison analysis. These results correlate with the significantly stronger antioxidant activity in samples with smaller particle sizes. The smallest particle size (< 45 µm) demonstrated the strongest antioxidant activity based on DPPH, ABTS, hydroxyl assay and FRAP. In addition, ramp function graph evaluates the desired particle size for maximum phytochemical composition and antioxidant activity is 44 µm. In conclusion, current results show the importance of particle size reduction of macroalgae samples to increase the effectivity of its biological activity.

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