scholarly journals Antioxidant Profile of Buckwheat Honey from the Republic of Moldova

2020 ◽  
Vol 71 (7) ◽  
pp. 325-336
Author(s):  
Miruna Draganescu ◽  
Caterina Dumitru ◽  
Liliana Baroiu ◽  
Alina Iancu ◽  
Camelia Vizireanu ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Reaction System ◽  
Polyphenolic Compounds ◽  
Scavenging Activity ◽  
Ftir Analysis ◽  
Republic Of Moldova ◽  
Antioxidant Profile ◽  
The Republic

The honey is a natural substance, whose therapeutic qualities have been developed in parallel with human evolution. Its antioxidant and antiinflammatory properties are due to the polyphenolic compounds. The purpose of this study is to identify and quantify the phenolic compounds and the FTIR spectrum from buckwheat honey from the Balti region, Republic of Moldova. The radical scavenging activity of honey was 83% in the DPPH� reaction system. Phenolic compounds from honey were identified by HPLC-MS method, the significant concentrations being lignans, catechins, isorhamnetin, rutin, apigenin and luteolin. FTIR analysis revealed both the carbohydrate profile in buckwheat honey and the presence of active compounds.

scholarly journals Analysis of polyphenolic compounds and radical scavenging activity of four AmericanActaea species

2007 ◽  
Vol 18 (3) ◽  
pp. 219-228 ◽  
Author(s):  
Paiboon Nuntanakorn ◽  
Bei Jiang ◽  
Hui Yang ◽  
Miguel Cervantes-Cervantes ◽  
Fredi Kronenberg ◽  
...  
Keyword(s):  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Polyphenolic Compounds ◽  
Scavenging Activity

scholarly journals Effects of the Drainage Methods on Phenolic Compounds and Radical Scavenging Activity of Foxtail Millet and Proso Millet

2014 ◽  
Vol 59 (3) ◽  
pp. 282-292 ◽  
Author(s):  
Ki Yuol Jung ◽  
Jee Yeon Ko ◽  
Jae Saeng Lee ◽  
Mi Sun Jeong ◽  
In Seok Oh ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Radical Scavenging Activity ◽  
Foxtail Millet ◽  
Radical Scavenging ◽  
Scavenging Activity ◽  
Proso Millet

scholarly journals Effect of Artificial Shading and Temperature on Radical Scavenging Activity and Polyphenolic Composition in Sweetpotato (Ipomoea batatas L.) Leaves

2003 ◽  
Vol 128 (2) ◽  
pp. 182-187 ◽  
Author(s):  
Md. Shahidul Islam ◽  
Makoto Yoshimoto ◽  
Koji Ishiguro ◽  
Shigenori Okuno ◽  
Osamu Yamakawa
Keyword(s):  
Phenolic Compounds ◽  
Ipomoea Batatas ◽  
Phenolic Content ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Cultivar Differences ◽  
Total Phenolic ◽  
Scavenging Activity ◽  
Caffeoylquinic Acid ◽  
Phenolic Components

The phenolic content and the radical scavenging activity were compared in leaves of sweetpotato (Ipomoea batatas L.) cultivars Shimon-1, Kyushu-119 and Elegant Summer grown under different temperature and shading conditions. Compared to cultivar differences, there was less effect of temperature and shading on the total phenolic content in sweetpotato leaves, however certain polyphenolic components differed widely among the treatments. The positive correlation between the radical scavenging activity and the level of total phenolics (r = 0.62) suggests that phenolic compounds are important antioxidant components of sweetpotato leaves. All the reverse-phase high-performance liquid chromatography (RP-HPLC) profiles of the cultivars tested showed peaks at the same retention times but peak areas of individual phenolic compounds differed with respective temperature and shading treatments. The phenolic compounds identified in the sweetpotato leaf were caffeic acid, chlorogenic acid, 4,5-di-O-caffeoylquinic acid, 3,5-di-O-caffeoylquinic acid, 3,4-di-O-caffeoylquinic acid, and 3,4,5-tri-O-caffeoylquinic acid. Most of the phenolic compounds were highest in leaves from plants grown at 20 °C without shading except 4,5-di-O-caffeoylquinic acid. The results indicate that growing leaves under moderately high temperatures and in full sun enhances the accumulation of phenolic components. These phenolic components have possible value in enhancing human health.

scholarly journals Antioxidant and Potentially Anti-Inflammatory Activity of Anthocyanin Fractions from Pomace Obtained from Enzymatically Treated Raspberries

Antioxidants ◽  
2019 ◽  
Vol 8 (8) ◽  
pp. 299 ◽  
Author(s):  
Urszula Szymanowska ◽  
Barbara Baraniak
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Solid Phase ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Phase Extraction ◽  
Scavenging Activity ◽  
Hplc Technique ◽  
Anti Inflammatory

Raspberry pomace was obtained from raspberries subjected to enzymatic maceration using three commercial pectinolytic preparations (Pectinex Ultra SP-L, Pectinex Yield Mash, and Ultrazym AFP-L). Phenolic compounds were extracted and anthocyanin fractions were isolated using the SPE solid phase extraction technique. In the separated anthocyanin fractions, the content of individual compounds was determined by the HPLC technique and the antioxidant activity was assessed with four complementary methods (DPPH and ABTS radical scavenging activity, chelating Fe(II) power, and ferric reducing power). Potential anti-inflammatory properties were also identified as the ability to inhibit the activity of lipoxygenase and cyclooxygenase 2. For these enzymes, the type of inhibition was determined based on the Lineweaver–Burke plot.

scholarly journals Free Radical Scavenging Activity, Reducing Power and Anti-Hemolytic Capacity of Algerian Drimia maritima Baker Flower Extracts

2020 ◽  
Vol 10 (4) ◽  
pp. 70-78
Author(s):  
Abir Rezzagui ◽  
Abderrahmane Senator ◽  
Soumia Benbrinis ◽  
Hamama Bouriche
Keyword(s):  
Lipid Peroxidation ◽  
Free Radical ◽  
Phenolic Compounds ◽  
Superoxide Anion ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Free Radical Scavenging ◽  
Scavenging Activity

This study was undertaken to evaluate the antioxidant and anti-hemolytic properties of Algerian Drimia maritima Baker flower extracts. Determination of phenolic content was carried out to estimate the chemical composition of D. maritima extracts. Antioxidant properties were investigated in all extracts using free radical scavenging activity (against DPPH, ABTS, hydroxyl radical, and superoxide anion), reducing power, inhibition of lipid peroxidation, and anti-hemolytic capacity. Phenolic determination revealed that D. maritima flowers contain phenolic compounds, flavonoids, and tannins. Ethyl acetate extract showed the highest reducing power and scavenging activity using DPPH and ABTS assays. However, aqueous extract was the most effective against hydroxyl radical, superoxide anion, and lipid peroxidation. The half-time of hemolysis indicates that chloroform extract exhibited the best anti-hemolytic capacity in the AAPH induced hemolysis model. The results of this study suggest that D. maritima could be used as a possible source of antioxidant phenolic compounds and that further determination of these compounds may provide more information on their medicinal value.  Keywords: Drimia maritima, phenolic compounds, scavenging activity, reducing power, anti-hemolytic.

scholarly journals Hypericum perforatum Mikrokapsüllerinin Ayran (İçilebilir Yoğurt) Üretiminde Kullanımı

2021 ◽  
Vol 9 (11) ◽  
pp. 2013-2021
Author(s):  
Fadime Seyrekoğlu ◽  
Hasan Temiz
Keyword(s):  
Phenolic Compounds ◽  
Sensory Analysis ◽  
Phenolic Content ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Total Phenolic ◽  
Scavenging Activity ◽  
Dpph Radical ◽  
Dpph Radical Scavenging Activity ◽  
Dpph Radical Scavenging

H. perforatum, which is widely used in traditional medicine due to its bioactive compounds was extracted with ethanol-water (3:7). The extract was encapsulated with maltodextrin and gum arabic in a spray dryer in order to protect the phenolic compounds in its structure. Different amounts of microcapsules were added to our traditional drink, i.e. ayran (drinking yoghurt). The total phenolic content and DPPH radical scavenging activity of the microcapsules, extract of HP, and ayran samples were determined. The amount of total phenolic compounds in the microcapsule provided a superior effect than the extract. The ayran samples were supplemented with 2%, 3%, 4%, 5% and 6% of H. perforatum (HP) microcapsules and it is observed that total phenolic content (TPC) and DPPH radical scavenging activity indicated an increase with concentration. TPC and DPPH activity were determined as 256.94 mg GAE / 100mL and 78.05% for 6% of HP microcapsules supplemented samples. As a result of the sensory analysis, ayran samples which supplemented with 4% of HS microcapsule gained the highest scores by the panellists and received more appreciation than the control group. According to sensory analysis, HP4 (ayran produced with 4% HP added microcapsule) sample was determined as the best sample, while the HP6 (Ayran produced with 6% HP added microcapsule) sample had the highest scores in terms of DPPH scavenging activity and TPC results. The overall results of this study revealed that 4% HP supplemented ayran can be produced with its increased health benefits and desirable properties. In this study, the use of H. perforatum microcapsules in ayran, its effect on antioxidant and phenolic components, the usage rates and acceptability of microcapsules were investigated.

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