Cranberry: A good source of natural antioxidants

The influence of extracts of cranbeny fruit and mixed tea (containing 40% cranberry) on stable 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals has been investigated by electron spin resonance (ESR) spectroscopy. All investigated extracts possess very high antioxidant activity, which increased dose-dependently at mass concentrations ranging from 0.5 to 3.5 mg/ml. The high contents of phenolic s (3.60-4.52 mg/g), anthocyanins (0.23-1.52 mg/g), flavan-3-ols (1.25-3.05 mg/g) and vitamin C (0.07-0.15 mg/g) in investigated extracts indicated that these compounds significantly contributed to the antioxidant activity. All these results show that the extracts of cranberry fruit and mixed tea can be used as easily accessible source of natural antioxidants and as a possible food supplement.

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Antioxidant activity of Induna apple pomace extract

Acta periodica technologica ◽

10.2298/apt0536239s ◽

2005 ◽

pp. 239-246 ◽

Cited By ~ 1

Author(s):

Sladjana Savatovic ◽

Sonja Djilas ◽

Vesna Tumbas ◽

Jasna Canadanovic-Brunet ◽

Gordana Cetkovic

Keyword(s):

Aqueous Solution ◽

Antioxidant Activity ◽

Acetic Acid ◽

Electron Spin Resonance ◽

Hydroxyl Radicals ◽

Electron Spin ◽

Esr Spectroscopy ◽

Methanol Extract ◽

Apple Pomace ◽

Spin Resonance

Different concentrations ofmethanol aqueous solution with or without 0.5% acetic acid and 80% acetone were used to achieve the highest yield of extraction of phenolics from Induna apple pomace. The highest content of phenolics (6.38 mg/g) was detected in the 80% methanol extract. The influence of 80% methanol extract of Induna apple pomace on stable l,l-diphenyl-2-picrylhydrazyl (DPPH) and reactive hydroxyl radicals has been investigated by electron spin resonance (ESR) spectroscopy. Based on the obtained results it can be concluded that the investigated extract is more effective in the DPPH test than on the DMPO-OH scavenging. In both cases antioxidant activity increased with increasing concentration of the investigated extract. The high contents ofphenolics (6.38 mg/g), flavonoids (1.01 mg/g) and flavan-3-ols (0.70 mg/g) in 80% methanol extract indicated that these compounds contributed to the antioxidant activity of Induna apple pomace.

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Physico-chemical and antioxidant properties of barberry juice powder and its effervescent tablets

Chemical and Biological Technologies in Agriculture ◽

10.1186/s40538-021-00220-z ◽

2021 ◽

Vol 8 (1) ◽

Author(s):

Sara Naji-Tabasi ◽

Bahareh Emadzadeh ◽

Mostafa Shahidi-Noghabi ◽

Mohammadreza Abbaspour ◽

Ehsan Akbari

Keyword(s):

Antioxidant Activity ◽

Phenolic Compounds ◽

Antioxidant Properties ◽

Natural Antioxidants ◽

Phenol Content ◽

Good Source ◽

Disintegration Time ◽

Physico Chemical ◽

High Antioxidant Activity ◽

Spray Dried

Abstract Background Barberry fruit is a good source of natural antioxidants and various functional compounds. Different concentrations of maltodextrin (10, 13, and 16% w/w) were used to produce spray-dried barberry juice powder and the powders (50, 60, and 70%) were applied to create effervescent tablets. Results The results showed that by increasing the amount of maltodextrin concentration, moisture, and water activity decreased (p < 0.05), but antioxidant activity increased. The barberry powder prepared with 13% (w/w) maltodextrin showed appropriate flowability, color, high antioxidant activity, and phenol content. The presence of high amounts of barberry powder in the tablet increased the disintegration time (1.02–4.03 min). Conclusions The tablet containing 60% barberry powder was selected as the best sample. Based on the results, barberry tablets with good color, high antioxidant activity, and phenolic compounds can be used as a ‘ready-to-drink’ product.

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Aktivitas Antioksidan dan Kandungan Komponen Bioaktif Sari Buah Namnam

Jurnal Kimia VALENSI ◽

10.15408/jkv.v0i0.3155 ◽

2015 ◽

pp. 130-136 ◽

Cited By ~ 3

Author(s):

Adawiah Adawiah ◽

Dede Sukandar ◽

Anna Muawanah

Keyword(s):

Antioxidant Activity ◽

Free Radical ◽

Vitamin C ◽

Oxidative Reaction ◽

High Antioxidant Activity

Antioxidant is a compoud inhibit that have an important role in protecting health due to it can absorb free radical molecules and inhibit oxidative reaction which cause anykinds of diseases. This study aims to determine the chemical compositition and antioxidant activity of namnam juice, characteristic of namnam. In this experimental, proximat analysis, TPC, TFC, Vitamin C, antioxidant activity were evaluated. Namnam juice contains 996.03 mg/L of phenolics, 421.09 mg/Lof flavonoids, 121.44 mg/100mL of vitamin C and high antioxidant activity with IC50 5µL/mL.DOI :http://dx.doi.org/10.15408/jkv.v0i0.3155.

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Acerola – tropikalny owoc z ogromną dawką witaminy C

Medycyna Rodzinna ◽

10.25121/mr.2018.21.2a.32 ◽

2018 ◽

Vol 21 (2A) ◽

Author(s):

Jacek Majewski ◽

Michał Orylski ◽

Aleksander Całkosiński ◽

Maciej Majewski

Keyword(s):

Insulin Resistance ◽

Cardiovascular Disease ◽

Antioxidant Activity ◽

Vitamin C ◽

Control Group ◽

Human Immune System ◽

Good Source ◽

Tropical Fruit ◽

Human Immune ◽

Risk Of Cancer

Acerola is a tropical fruit which contains extremely high amounts of vitamin C. Thanks to that, it is used to produce concentrates of ascorbic acid. Vitamin C is also proven to have impact on human immune system. Additionally, it is a good source of carotene, vitamin A, anthocyanins and other nutrients. Several studies were carried out to establish acerola impact on the metabolism. Among mice it decreased the after-meal glucose level and HbA1c but had no effect on insulin resistance. Another study shows that acerola can contribute to reducing obesity and inflammation thanks to increasing IL-10/TNF ratio. Also, it may lead to decrease the risk of cancer or cardiovascular disease thanks to having strong antioxidant activity. Mice given acerola had decreased level of fatigue and could withstand longer periods of activity compared to control group. All those features of acerola are available if it is processed shortly after being collected and is not exposed to heat.

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Electron spin resonance (ESR) spectroscopy study of cheese treated with accelerated electrons

Food Chemistry ◽

10.1016/j.foodchem.2018.09.101 ◽

2019 ◽

Vol 276 ◽

pp. 315-321 ◽

Cited By ~ 4

Author(s):

Rosa Escudero ◽

Jose Segura ◽

Raquel Velasco ◽

Margarita Valhondo ◽

M. Dolores Romero de Ávila ◽

...

Keyword(s):

Electron Spin Resonance ◽

Electron Spin ◽

Esr Spectroscopy ◽

Spectroscopy Study ◽

Accelerated Electrons ◽

Spin Resonance

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The Coordination Chemistry of Phosphoryl Compounds Containing the -N(CH3)2 Group, XII.

Zeitschrift für Naturforschung B ◽

10.1515/znb-1973-3-402 ◽

1973 ◽

Vol 28 (3-4) ◽

pp. 104-106 ◽

Cited By ~ 8

Author(s):

M.W.G. De Bolster ◽

B. Nieuwenhuijse ◽

J. Reedijk

Keyword(s):

Electron Spin Resonance ◽

Metal Ion ◽

Room Temperature ◽

Esr Spectroscopy ◽

Hyperfine Coupling ◽

Hyperfine Coupling Constant ◽

Zero Field ◽

Coupling Constant ◽

Spin Resonance ◽

Temperature Electron

Room temperature electron spin resonance powder spectra have been recorded for some compounds of the type Mn(ligand)p(anion)2 with hexamethylphosphoramide and nonamethylimidodiphosphoramide as ligands (p = 1 - 4) and BF-4, NO-3, Cl-, Br-, I- and NCS-as anions.The values for the zero-field parameters, D and λ, have been determined and are compared with literature data. It is shown that ESR spectroscopy can be very helpful in elucidating the structures of manganese(II) complexes.The high values for the hyperfine coupling constant of the solvates suggest that in these complexes the bonding between the ligands and the metal ion is essentially ionic.

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An ESR and calorimetric study of iron oolitic samples from the Northampton ironstone

Clay Minerals ◽

10.1180/claymin.1990.025.3.06 ◽

1990 ◽

Vol 25 (3) ◽

pp. 303-311 ◽

Cited By ~ 9

Author(s):

A. U. Gehring ◽

R. Karthein

Keyword(s):

Electron Spin Resonance ◽

Electron Spin ◽

Hyperfine Splitting ◽

Esr Spectroscopy ◽

Thermal Conversion ◽

Esr Spectra ◽

Calorimetric Study ◽

Calorimetric Methods ◽

Mineral Phases ◽

Spin Resonance

AbstractElectron spin resonance (ESR) spectroscopy and calorimetric methods were used to characterize conversion processes in multimineral samples from the Northampton ironstone (NIS) at temperatures between 25°C and 800°C. The beginning of the thermal conversion processes can be determined by the formation of asymmetric ESR spectra with g ≈ 2 at 250°C. The breakdown of the berthierine structure between 250°C and 520°C is indicated by the disappearance of the hyperfine splitting in the Mn2+ spectrum and the formation of magnetite. The decomposition of siderite and calcite was found by calorimetric methods at 580°C and 700°C, respectively. The hematite formation between 550°C and 800°C is explained by the decomposition of siderite but also by the oxidation of previously formed magnetite. The occurrence of hematite as the dominant ferric oxide at 800°C signifies the end of the conversion process of the major mineral phases in the NIS samples.

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ESR Investigations on Blood Treated Intravenously with Ascorbic Acid"

Zeitschrift für Naturforschung C ◽

10.1515/znc-1981-1-202 ◽

1981 ◽

Vol 36 (1-2) ◽

pp. 1-4 ◽

Cited By ~ 1

Author(s):

Wolfgang Lohmann ◽

Klaus G. Bensch ◽

Elisabeth Müller ◽

Sa-Ouk Kang

Keyword(s):

Ascorbic Acid ◽

Vitamin C ◽

Esr Spectroscopy ◽

Considerable Increase ◽

Acute Lymphatic Leukemia ◽

Healthy Individuals ◽

Healthy Male ◽

Spin Concentration ◽

Lymphatic Leukemia ◽

Spin Resonance

Abstract The effect of 1 g of ascorbic acid, administered intravenously to healthy male and female volunteers, on blood and its constituents was investigated by means of electron spin resonance (ESR) spectroscopy and by differential hematologic examinations. The native blood ESR spectrum exhibits 2 min after injection of vitamin C a considerable increase in spin concentration and a new signal at about g = 2.005 which we previously had found to correlate to the semidehydroascorbate radical. This spectrum is identical to that obtained in acute lymphatic leukemia. While it prevails in untreated leukemic patients, spin concentration and shape of the spectrum obtained return to normal within several hours to one day in healthy individuals. Since neither in erythrocytes nor in plasma modifications could be observed, the ESR changes detected must have their origin in the leukocytes. Hematologic studies of the peripheral blood show that the number of granulocytes, lymphocytes, and thrombocytes was not drastically affected by the vitamin C injection.

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