scholarly journals New Insights into the Antioxidant Compounds of Achenes and Sprouted Buckwheat Cultivated in the Republic of Moldova

2021 ◽  
Vol 11 (21) ◽  
pp. 10230
Author(s):  
Caterina Dumitru ◽  
Rodica Mihaela Dinica ◽  
Gabriela-Elena Bahrim ◽  
Camelia Vizireanu ◽  
Liliana Baroiu ◽  
...  
Keyword(s):  
Functional Foods ◽  
Radical Scavenging ◽  
Total Content ◽  
Antioxidant Compounds ◽  
Ftir Analysis ◽  
Republic Of Moldova ◽  
Beneficial Effects ◽  
Methanolic Extracts ◽  
The Republic ◽  
Radical Scavenging Properties

It is well known that both Fagopyrum esculentum species, buckwheat achenes and buckwheat germs, contain flavonoids, and that they can be considered functional foods. In the present study we have analyzed the total content of polyphenols (TPC) and flavonoids (TFC), as well as the antioxidant activity of buckwheat ahcenes originating from the Balti region, Republic of Moldova, and also of the buckwheat sprouts over seven days of germination. The content of phytochemicals in achenes and germinated buckwheat after three and seven days was determined by HPLC–MS analysis. Using the Folin–Ciocalteu method, we recorded an increase in TPC of 360%, and of 436% in TFC after seven days of buckwheat ahcene germination. We aimed to investigate the free radical scavenging properties of methanolic extracts from ahcenes and sprouted buckwheat. We identified and quantified flavonoids and lignans such as rutin, orientin, isoorientin, vitexin, quercetin, quercitrin, isorhamnetin, lutein, apigenin, catechins, coumestrol—which have countless beneficial effects on human health—using HPLC–MS. FTIR analysis also revealed the accumulation of phenolic compounds during germination. This is the first study on the identification and quantification of phytochemicals from buckwheat achenes and sprouts from the Balti region of the Republic of Moldova.

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 Melatonin in Wine and Beer: Beneficial Effects

Molecules ◽  
2021 ◽  
Vol 26 (2) ◽  
pp. 343
Author(s):  
Javier Marhuenda ◽  
Débora Villaño ◽  
Raúl Arcusa ◽  
Pilar Zafrilla
Keyword(s):  
Intracellular Signaling ◽  
Plasma Concentrations ◽  
Radical Scavenging ◽  
Direct Interaction ◽  
Melatonin Receptors ◽  
Current Evidence ◽  
Sleep Cycle ◽  
Beneficial Effects ◽  
Neuroprotective Actions ◽  
Radical Scavenging Properties

Melatonin is a hormone secreted in the pineal gland with several functions, especially regulation of circadian sleep cycle and the biological processes related to it. This review evaluates the bioavailability of melatonin and resulting metabolites, the presence of melatonin in wine and beer and factors that influence it, and finally the different benefits related to treatment with melatonin. When administered orally, melatonin is mainly absorbed in the rectum and the ileum; it has a half-life of about 0.45–1 h and is extensively inactivated in the liver by phase 2 enzymes. Melatonin (MEL) concentration varies from picograms to ng/mL in fermented beverages such as wine and beer, depending on the fermentation process. These low quantities, within a dietary intake, are enough to reach significant plasma concentrations of melatonin, and are thus able to exert beneficial effects. Melatonin has demonstrated antioxidant, anticarcinogenic, immunomodulatory and neuroprotective actions. These benefits are related to its free radical scavenging properties as well and the direct interaction with melatonin receptors, which are involved in complex intracellular signaling pathways, including inhibition of angiogenesis and cell proliferation, among others. In the present review, the current evidence on the effects of melatonin on different pathophysiological conditions is also discussed.

scholarly journals Antioxidant and Total Phenolic Content of Breadfruit (Artocarpus altilis) Leaves

2018 ◽  
Vol 150 ◽  
pp. 06007 ◽  
Author(s):  
Lee Yit Leng ◽  
Nuramira binti Nadzri ◽  
Khor Chu Yee ◽  
Norawanis binti Abdul Razak ◽  
Abdul Razak Shaari
Keyword(s):  
Antioxidant Activity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Copper Ions ◽  
Radical Scavenging ◽  
Chemical Components ◽  
Total Phenolic ◽  
Ftir Analysis ◽  
Artocarpus Altilis ◽  
Methanolic Extracts

This work aims to determine antioxidant, total phenolic content and Fourier transform infrared spectroscopy (FTIR) analysis of breadfruit leaves which are essential in management of diabetes. The methanolic extracts of breadfruit leaves was used to analyze for total phenolic content and antioxidant. Total phenolic content of the extracts was measured using the Folin–Ciocalteu assay while the antioxidant activity of plant extracts was measured by the 1, 1-diphenyl-2-picryhyradrazyl (DPPH) radical scavenging assay. FTIR analysis was used to determine the chemical components in the leaves. Total phenolic content in fresh breadfruit leaves (144.16 mg/g ± 17.98) was comparable to those of green tea. The results showed the breadfruit leaves extracts exhibited potent antioxidant activity. The presence of OH group also suggests antioxidant capacity of breadfruit leaves to deactivate free radicals as glucose itself could react with hydrogen peroxide in the presence of iron and copper ions to form hydroxyl radical.

Total Phenolic Content and DPPH Free Radical Scavenging Activity of Young Turmeric Grown in Southern Thailand

2019 ◽  
Vol 886 ◽  
pp. 61-69
Author(s):  
Suriyan Sukati ◽  
Warachate Khobjai
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Content ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Total Phenolic ◽  
Antioxidant Compounds ◽  
Scavenging Activity ◽  
Methanolic Extracts ◽  
Southern Thailand

Turmeric (Curcuma longa L.), a member of Zingiberacaeae, is used for Thai traditional medicine, flavoring, preservative, and coloring agent. In Southern Thailand, turmeric is a famous ingredient for food recipes. Not only is the ripened rhizome used for cuisine, but also the young rhizomes. Previous studies have indicated that a variety of turmeric products from the ripened rhizome are valuable source of antioxidant compounds. However, there are ambiguous data regarding the level of antioxidant activity of the young rhizome. The aim of this study was to investigate the level of total phenolic content (TPC) and antioxidant activity of the young rhizomes by comparing to the ripened rhizome. TPC and antioxidant activity of aqueous and 80% methanolic extracts from the young turmeric grown in Southern Thailand were estimated using the Folin-Ciocalteu method and DPPH free radical scavenging activity (DPPH-RSA) assay, respectively. Results showed that the concentration of TPC determined in methanolic extract (19.80±0.25 mg GAE/ g extract) from the young rhizome was significantly higher than the corresponding aqueous extract (18.38±0.41 mg GAE/ g extract). The aqueous and methanolic extracts exhibited significant inhibition in DPPH-RSA with the half-maximal inhibitory concentration (IC50) value of 5.88±0.70 mg/mL and 3.00±0.31 mg/mL, respectively. However, in comparison with the ripened rhizome, TPC and DPPH-RSA of the young rhizome were lower. These results indicate that the young rhizome grown in Southern Thailand could be a source of antioxidant compounds, but the ripened rhizome provides better antioxidant properties than the young rhizome.

scholarly journals Solid-phase extraction of antioxidant compounds from commercial cranberry extract and its antiradical activity

2007 ◽  
pp. 157-164 ◽  
Author(s):  
Vesna Tumbas ◽  
Sonja Djilas ◽  
Jasna Canadanovic-Brunet ◽  
Gordana Cetkovic ◽  
Sladjana Savatovic
Keyword(s):  
Vitamin C ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Total Content ◽  
Antioxidant Compounds ◽  
Phase Extraction ◽  
Spin Resonance

This study is concerned with the fractionation and determination of major antioxidant compounds (phenols, flavonoids, anthocyanins and vitamin C) in commercial cranberry extract. The total content of phenolics, flavonoids and total and monomers of anthocyanins, determined spectrophotometrically, was 1.67 mg/g, 0.41 mg/g, 5.12 mg/g and 3.32 mg/g. The content of vitamin C, determined volumetrically, was 121.74 mg/g. Commercial cranberry extract was dissolved in 80 % acetone and the solution was fractionated using solid phase extraction (SPE) in order to abstract vitamin C, neutral and acidic phenols. The free radical scavenging activity of the cranberry extract and its fractions was investigated on stable 2,2-diphenyl-1-picrylhydrazyl (DPPH) and reactive hydroxyl radicals employing electron spin resonance (ESR) spectroscopy. The most effective fractions were those containing vitamin C (AADPPH= AAOH=100%), neutral (AADPPH=89.50% and AAOH=43.11%) and acidic (AADPPH=83.98% and AAOH=38.58%) phenols. The presence of vitamin C, abstracted from cranberry extract, was determined by Fe(III)-mediated ascorbate oxidation which yields characteristic ESR doublet spectrum of ascorbyl radical.

Rutin phospholipid complexes confer neuro-protection in ischemic-stroke rats

RSC Advances ◽  
2016 ◽  
Vol 6 (99) ◽  
pp. 96445-96454 ◽  
Author(s):  
Hafsa Ahmad ◽  
Abhishek Arya ◽  
Satish Agrawal ◽  
Prachi Mall ◽  
Sheeba Saji Samuel ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Cerebral Ischemia ◽  
Radical Scavenging ◽  
Flavonol Glycoside ◽  
Beneficial Effects ◽  
Radical Scavenging Properties ◽  
Neuro Protection

Rutin, a natural flavonol glycoside is known to possess significant radical scavenging properties which might have beneficial effects in cerebral ischemia.

scholarly journals Bio-Prospecting of a Few Brown Seaweeds for Their Cytotoxic and Antioxidant Activities

2011 ◽  
Vol 2011 ◽  
pp. 1-9 ◽  
Author(s):  
Rashmi C. Vinayak ◽  
A. S. Sabu ◽  
Anil Chatterji
Keyword(s):  
Metal Ion ◽  
Antioxidant Activities ◽  
Radical Scavenging Activity ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Total Phenolic ◽  
Antioxidant Compounds ◽  
Brown Seaweeds ◽  
Methanolic Extracts

Methanolic extracts (MEs) of seven brown seaweeds occurring in the Indian coastal waters were screened for their cytotoxic and antioxidant properties following various assays. The methanolic extracts of seaweeds in the order ofDictyopteris australis > Spatoglossum variabile > Stoechospermum marginatum > Spatoglossum aspermumshowed significant cytotoxic activity. A very high DPPH radical scavenging activity was exhibited by the methanolic extracts prepared fromSt. marginatum, Padina tetrastromatica, Dictyopteris delicatulaandS. aspermum. The total phenolic content of the MEs varied from 13.19 ± 0.32 to 25.29 ± 0.445 gallic acid equivalents (mg g−1of methanolic extract). The reducing power assay indicated a dose dependency, at concentrations of 0.1, 0.5 and 1.0 and 2.0 mg mL−1of MEs and decreased in the following order:Butylated hydroxy toluene > P. tetrastromatica > D. delicatula > S. aspermum > S. variabile > S. marginatum > D. australis > S. marginatum. Furthermore,D. australis,S. aspermum, S. variabileandS. marginatumdemonstrated good metal ion chelating properties. All the above evidences suggest that, the antioxidant compounds found in brown seaweeds scavenge free radicals through effective intervention. This decisively promotes them as a potential source of natural antioxidants.

scholarly journals Evaluation of Antioxidant Compounds, Antioxidant Activities, and Mineral Composition of 13 Collected Purslane (Portulaca oleraceaL.) Accessions

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Md. Amirul Alam ◽  
Abdul Shukor Juraimi ◽  
M. Y. Rafii ◽  
Azizah Abdul Hamid ◽  
Farzad Aslani ◽  
...  
Keyword(s):  
Antioxidant Activities ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Antioxidant Compounds ◽  
Total Phenol Content ◽  
Mineral Contents ◽  
Frap Assay ◽  
Methanolic Extracts ◽  
Common Purslane ◽  
Dpph Scavenging

The methanolic extracts of 13 accessions of purslane were analyzed for their total phenol content (TPC), total flavonoid contents (TFC), and total carotenoid contents (TCC) and antioxidant activity of extracts was screened using FRAP assay and DPPH radical scavenging methods. The TPC, TFC, and TCC ranged from0.96±0.04to9.12±0.29 mg GAE/g DW,0.13±0.04to1.44±0.08 mg RE/g DW, and0.52±0.06to5.64±0.09 mg (β-carotene equivalent) BCE/g DW, respectively. The DPPH scavenging (IC50) activity varied between2.52±0.03 mg/mL and3.29±0.01 mg/mL and FRAP ranged from7.39±0.08to104.2±6.34 μmol TE/g DW. Among all the measured micro- and macrominerals K content was the highest followed by N, Na, Ca, Mg, P, Fe, Zn, and Mn. The overall findings proved that ornamental purslane was richer in antioxidant properties, whereas common purslane possesses more mineral contents than ornamental ones.

Comparison of Antioxidant Activity in the Methanolic Peels Extracts of Solanum lycopersocum and Solanum lycopersocum Var. Cerasiforme

2017 ◽  
Vol 9 (04) ◽  
Author(s):  
Ravindran Muthukumarasamy ◽  
Nur Amran ◽  
Alifah Ilyana ◽  
D. Radhakrishnan
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Oxygen Species ◽  
Tomato Species ◽  
Methanolic Extracts ◽  
Daily Diet ◽  
Free Radical Scavenging Assay ◽  
Radical Scavenging Properties ◽  
Method Of Extraction

Oxidative stress is one of the vital factors which causes serious illness to humans. The reactive oxygen species also accelerates the aging process and antioxidants are crucial in daily diet as it will help to protect body from free radicals and their threats. The current study focuses on the comparison of antioxidant activity in the methanolic peels extract between two tomato species namely Solanum lycopersocum and Solanum lycopersocum var. Cerasiforme (cherry tomato). Tomatoes have abundant antioxidant properties and was determined by DPPH free radical scavenging assay. Methanolic extracts (by maceration method of extraction) of both peels showed high radical scavenging properties, however peels of Solanum lycopersocum var. cerasiforme proved to have higher antioxidant properties. The IC50 result revealed that methanolic peels extract of Solanum lycopersocum var. cerasiforme was found to be 619.14 µg/ml compared to Solanum lycopersocum with 697.16 µg/ml. Thus, the present study reveals that the peels of tomatoes exhibit great potential for antioxidant activity and may be useful for their medicinal and nutritional functions.

scholarly journals In vitro Anticoccidial, Antioxidant Activities and Biochemical Screening of Methanolic and Aqueous Leaves Extracts of Selected Plants

2021 ◽  
Vol 41 (01) ◽  
pp. 57-63
Author(s):  
Wajiha .
Keyword(s):  
Antioxidant Activities ◽  
Radical Scavenging ◽  
Eimeria Species ◽  
Reducing Power ◽  
Antioxidant Compounds ◽  
Biochemical Screening ◽  
Antioxidant Power ◽  
Methanolic Extracts ◽  
Total Antioxidant

Avian coccidiosis, a protozoan parasitic disease caused by genus Eimeria. Due to emergence of drug resistant Eimeria species, this study was aimed to evaluate anticoccidial potentials of Ficus racemosa, Cassia fistula and Syzygium cumini leaves extracts. In vitro anticoccidial efficacy of extracts was evaluated by oocysts sporulation inhibition and sporozoites viability inhibition assays of mixed Eimeria species oocysts. The set up was examined after 48hrs of incubation. DPPH radical scavenging activity, ferric reducing antioxidant power and total antioxidant capacity were used for the evaluation of antioxidant potential of extracts. Among tested extracts maximum oocysts sporulation inhibition 86.81±2.35% and sporozoites viability inhibition was 86.73±1.67% at concentration 30 mg/ml of C. fistula methanolic leaves extract against E. mitis and E. tenella respectively. Highest radical scavenging capacity 67.82±0.00 and reducing power 2.17±0.01 was shown by F. racemosa and C. fistula methanolic leaves extract respectively. Maximum total antioxidant power was observed in C. fistula 30.95±0.35 and F. racemosa 21.93±1.41µg/mg methanolic leaves extracts. Antioxidant compounds including phenols, flavonoids, alkaloids, saponins, carbohydrates etc. were detected through biochemical screening of selected plants extracts. The maximum amount of phenols 32.50±0.00µg/ml and flavonoids 40.00±1.00µg/ml were recorded in C. fistula methanolic extracts. It is concluded that selected plants methanolic extracts possess best anticoccidial and antioxidant activities due to presence of medicinally important phytochemicals. Further research is needed for identification and isolation of anticoccidial active compounds from these plants that can be used in the formulation of drugs against coccidiosis

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