ANTIOXIDANT ACTIVITY OF ASCORBIC ACID PDF



Antioxidant Activity Of Ascorbic Acid Pdf

IN VITRO ANTIOXIDANT AND FREE RADICAL SCAVENGING STUDIES. Impact of ascorbic acid and α-tocopherol on antioxidant activity of flax cultivars under salinity stress Acta biol. Colomb., 20(2):209-222, mayo - agosto de 2015 - 211, the content of total phenolic compounds, ascorbic acid, betacyanin, betaxanthin and the stability of betacyanin pigments in presence of Cu (II)-dependent hydroxyl radicals (OH•), in 18 cultivars of purple, red, yellow and white cactus pear from six Mexican states..

Antioxidant activity of tocopherols ascorbyl palmitate

SPECTROPHOTOMETRIC METHOD FOR THE STUDY OF THE ANTIOXIDANT. as tocopherols , ascorbic acid, carotenoids and plant phenolics. Freeze-drying is known to extend the Freeze-drying is known to extend the shelf-life of foods by preventing the microbial growth and lipid retarding oxidation [14]., Many of these aforementioned studies determined UA's antioxidant actions within normal physiological levels, and some found antioxidant activity at levels as high as 285 μmol/L. Vitamin C [ edit ] Ascorbic acid or " vitamin C " is a monosaccharide oxidation-reduction ….

In plasma, uric acid and ascorbic acid together contribute around 80% of the total antioxidant activity, which is around 1000 ОјM, the rest being largely vitamin E, bilirubin, and protein. 18 19 20 31 In tears, uric acid and ascorbic acid account for around half the total antioxidant activity. account for the higher antioxidant activity of commercial juices compared to the experimental ones. In addition, anthocyanins, ellagic acid derivatives, and hydrolyzable tannins were detected and quantified in the pomegranate juices.

3- O -ethyl ascorbic acid may be a good whitening ingredient in cosmetics. However, before it can be successfully used in cosmetics, its biofunctionality and stability need to be comprehensively investigated. The reduction and 2,2-Diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging ability of this compound were analyzed to assess its antioxidant potential. In addition, the tyrosinase The ascorbic acid and total phenolic content to antioxidant activity of fresh juices of four ripe and unripe citrus fruits namely Citrus limon, C. reticulata, C. sinensis and C. aurantium were

Benzie IFF & Strain JJ (1999) Ferric reducing/antioxidant power assay: direct measure of total antioxidant activity of biological fluids and modified version for simultaneous measurement of total antioxidant power and ascorbic acid concentration. The aim of this study was to assess, using the dPPH assay, the antioxidant activity of several substances that could be proposed to immediately revert the problems caused by bleaching procedures. The percentage of antioxidant activity (aa%) of 10% ascorbic acid

as tocopherols , ascorbic acid, carotenoids and plant phenolics. Freeze-drying is known to extend the Freeze-drying is known to extend the shelf-life of foods by preventing the microbial growth and lipid retarding oxidation [14]. AA is a small antioxidant molecule, vitamin C (L-ascorbic acid), fulfils essential metabolic functions in the life of animals and plants. It is found in plants, animals and single cell organisms.

The only indication of ascorbic acid's autoxidative effect in humans has been observed following I.V. administration of massive amounts of ascorbic acid (80 g/2 days) in one individual with acute renal failure and a genetic disorder resulting in a deficiency of the enzyme glucose-6-phosphate dehydrogenase.34 All other in vivo studies support the antioxidant role of ascorbic acid.35-38 (i Keywords: orange, plum, antioxidant activity, ascorbic acid, acetonic extract, alcoholic extract _____ 1. Introduction Fruits play an important role as protective foods, with therapeutic effects appreciated since antiquity. Today it is known that populations that have a

antioxidant activity, phenolic, flavonoid and ascorbic acid contents of commonly consumed vegetables in Nigeria and identify which of these vegetables has the highest Investigation of Antioxidant and Hepatoprotective Activity of Standardized Curcuma xanthorrhiza Rhizome in Carbon Tetrachloride-Induced Hepatic Damaged Rats.

In vitro antioxidant activity and phytochemical analysis

antioxidant activity of ascorbic acid pdf

In vitro antioxidant activity and phytochemical analysis. In plasma, uric acid and ascorbic acid together contribute around 80% of the total antioxidant activity, which is around 1000 ОјM, the rest being largely vitamin E, bilirubin, and protein. 18 19 20 31 In tears, uric acid and ascorbic acid account for around half the total antioxidant activity., The objective of this study was to quantify the content of total phenolics, total betalains, ascorbic acid and antioxidant activity found in the juice, pulp and rind of the two commercial varieties of prickly pear.

antioxidant activity of ascorbic acid pdf

Transdermal Delivery of Vit c Antioxidant Vitamin C

antioxidant activity of ascorbic acid pdf

(PDF) Ascorbic Acid Total Phenol Content and Antioxidant. The antioxidant activity of 6-phosphatidyl-L-ascorbic acid was investigated in a homogeneous solution and a liposomal suspension. In an apolar solvent, one molecule of 6-phosphatidyl-L-ascorbic acid could trap one peroxyl radical. Guava fruit extracts were analyzed for antioxidant activity measured in methanol extract (AOAM), antioxidant activity measured in dichloromethane extract (AOAD), ascorbic acid, total phenolics, and total carotenoids contents..

antioxidant activity of ascorbic acid pdf

  • Antioxidant Ability and Stability Studies of 3-O-Ethyl
  • Ascorbic Acid Lycopene and Antioxidant Activities of Red
  • Antioxidant Activity of the Aqueous Extracts of Spicy Food

  • Ascorbic acid solution is easily oxidized to the diketo form referred to as dehydroascorbic acid, which can easily be converted into oxalic acid, diketogulonic acid or threonic acid 86,87. Antioxidants have aromatic ring structures and are able to delocalize theunpaired electron. Though the antioxidant potential of fractions was found to be low (P < 0.05) than those of ascorbic acid and rutin, the study revealed that TLB and TLE have prominent antioxidant activity; the presence of phenolic compounds (containing phenolic hydroxyls) are mainly found in these two fractions and could be attributable to the observed high antiradical properties of these fractions.

    The aim of this work was to study the phenolic compounds identified in rice, their antioxidant activity and their potential beneficial effects on health. In vitro and in … IN VITRO ANTIOXIDANT AND FREE RADICAL SCAVENGING STUDIES OF ALCOHOLIC EXTRACT OF MEDICAGO SATIVA L. M 5 In vitro antioxidant and free radical scavenging studies 19 DPPH Model 0 20 40 60 80 100 120 2 4 8 1 6 3 2 6 4 12 2 56 5 12 1 000 Concentration (µg/ml) % Scavenging Ethanolic extract Ascorbic acid Fig. 1. Antioxidant activity of different concentrations of alcoholic extract and ascorbic

    flavonoids, cinnamic acids, benzoic acids, folic acid, ascorbic acid, tocopherols, tocotrienols etc., are some of the antioxidants produced by the plant for their sustenance. the content of total phenolic compounds, ascorbic acid, betacyanin, betaxanthin and the stability of betacyanin pigments in presence of Cu (II)-dependent hydroxyl radicals (OH•), in 18 cultivars of purple, red, yellow and white cactus pear from six Mexican states.

    with the standard antioxidant ascorbic acid. The results have shown that crude ethanolic extract of the leaves of Co showed excellent antioxidant activity due to the presence of bioactive compounds namely alkaloids, betacyanin, cardiac glycosides, 5.5 and 681.5 В± 8.4 Вµg/ml, respectively. The IC 50 value for ascorbic acid was 8.6 В± 0.1 Вµg/ml. The results indicate that the antioxidant activity of the crude extract

    sun-drying will not reduce the antioxidant activity of the green leafy vegetable, moreover, the phenol constituent of the green leafy vegetables contributes more to the antioxidant properties of vegetables than ascorbic acid, as its increase on sun-drying cause a significant (P < 0.05) Impact of ascorbic acid and О±-tocopherol on antioxidant activity of flax cultivars under salinity stress Acta biol. Colomb., 20(2):209-222, mayo - agosto de 2015 - 211

    The levels of sugars, ascorbic acid, total phenolic content (TPC) and total antioxidant activity (TAA) were determined in fruit juices from seven passion fruit (Passiflora spp.) cultivars: P. edulis cultivars Purple, Frederick, Yellow, Pink, P. edulis f. Keywords: orange, plum, antioxidant activity, ascorbic acid, acetonic extract, alcoholic extract _____ 1. Introduction Fruits play an important role as protective foods, with therapeutic effects appreciated since antiquity. Today it is known that populations that have a

    Guava fruit extracts were analyzed for antioxidant activity measured in methanol extract (AOAM), antioxidant activity measured in dichloromethane extract (AOAD), ascorbic acid, total phenolics, and total carotenoids contents. terms of total phenolics content, total antioxidant activity, and reducing power. Different studies were carried out by comparing Kalanchoe pinnata extract with antioxidant references such as gallic acid; ascorbic acid. All these antioxidant activities increased with increasing concentrations in a dose dependent manner. It was found to be significant and valuable. Antioxidant, Kalanchoe

    ANTIOXIDANT ACTIVITY Shodhganga

    antioxidant activity of ascorbic acid pdf

    Antioxidant Ability and Stability Studies of 3-O-Ethyl. 14/09/2009В В· Ferric reducing/ antioxidant power assay: direct measure of total antioxidant activity of biological fluids and modified version for simultaneous measurement of total antioxidant power and ascorbic acid concentration., 75 SRIPAKDEE et al., Orient. J. Chem., Vol. 33(1), 74-86 (2017) and ascorbic acid are the two major contributors to the total antioxidant activity in vegetable and fruit..

    Original Article Comparison of ABTS DPPH FRAP and ORAC

    ANTIOXIDANT ACTIVITY Shodhganga. The ascorbic acid and total phenolic content to antioxidant activity of fresh juices of four ripe and unripe citrus fruits namely Citrus limon, C. reticulata, C. sinensis and C. aurantium were, Journal of Fruit and Ornamental Plant Research Vol. 17/(2) 2009: 115-120 ANTIOXIDANT CAPACITY, ASCORBIC ACID AND PHENOLICS CONTENT IN WILD EDIBLE FRUITS.

    antioxidant activity, phenolic, flavonoid and ascorbic acid contents of commonly consumed vegetables in Nigeria and identify which of these vegetables has the highest The only indication of ascorbic acid's autoxidative effect in humans has been observed following I.V. administration of massive amounts of ascorbic acid (80 g/2 days) in one individual with acute renal failure and a genetic disorder resulting in a deficiency of the enzyme glucose-6-phosphate dehydrogenase.34 All other in vivo studies support the antioxidant role of ascorbic acid.35-38 (i

    The anti-oxidant activity and total phenolic content of alcoholic extracts from seven medicinal plants (Asparagus racemosus, Ocimum sanctum, Cassia fistula, Piper betel, Citrus aurantifolia, Catharanthus roseus , and Polyalthia longifolia) were antioxidant activity, phenolic, flavonoid and ascorbic acid contents of commonly consumed vegetables in Nigeria and identify which of these vegetables has the highest

    Benzie IFF & Strain JJ (1999) Ferric reducing/antioxidant power assay: direct measure of total antioxidant activity of biological fluids and modified version for simultaneous measurement of total antioxidant power and ascorbic acid concentration. Determination of Caffeine Content and Antioxidant Activity of Coffee Belete Tewabe Gebeyehu 1, is expressed as ascorbic acid equivalent antioxidant capacity in milligram per gram of the dried coffee samples. The ferric reducing power values of the extracts were 9.532 В± 0.201, 9.159 В± 0.441, 8.955 В± 0.180, 6.751 В± 0.284 for Wembera, Burie, Goncha and Zegie coffees, respectively. The

    Though the antioxidant potential of fractions was found to be low (P < 0.05) than those of ascorbic acid and rutin, the study revealed that TLB and TLE have prominent antioxidant activity; the presence of phenolic compounds (containing phenolic hydroxyls) are mainly found in these two fractions and could be attributable to the observed high antiradical properties of these fractions. Keywords: orange, plum, antioxidant activity, ascorbic acid, acetonic extract, alcoholic extract _____ 1. Introduction Fruits play an important role as protective foods, with therapeutic effects appreciated since antiquity. Today it is known that populations that have a

    The aim of this study was to assess, using the dPPH assay, the antioxidant activity of several substances that could be proposed to immediately revert the problems caused by bleaching procedures. The percentage of antioxidant activity (aa%) of 10% ascorbic acid ascorbic acid content, and for woody portion index (wpi). Antioxidant activity ranged from 64.54 to 75.12% and ascorbic acid was Antioxidant activity ranged from 64.54 to 75.12% and ascorbic acid …

    Ascorbic acid and its esters function as antioxidants with some substrates by protecting double bonds and scavenging oxygen. Activity of ascorbates has been shown on vegetable oils, animal fats, vitamin A, carotenoids, citrus oils, and in fat-containing foods such as fish, margarine, and milk. ascorbic acid was 152.37В±2.06 mg/100 g, and О±-tocopherol was 59.27В±0.10 mg/100 g sample. The findings suggested that the L. leucocephala sprouts could be considered as a source of natural antioxidant.

    Abstract. In the quest to use antioxidant compounds occurring in nature or related compounds, extensive studies have been made on vegetable oils, animal fats, apocarotenal, and vitamin A as substrates with ascorbyl palmitate, tocopherols, and ascorbic acid as antioxidants. Determination of total phenolics and ascorbic acid related to an antioxidant activity and thermal stability of the Mao fruit juice Abstract This study was aimed to determine total phenolics and ascorbic acid in association with their antioxidant activity and thermal stability. Both total phenolics and ascorbic acid contents of the mao juice were 337.52 mg GAE/100 mL and 175.34 mg/100 mL

    The antioxidant activity of methanol fruit extract of Diplocyclos palmatus was examined by comparing it to the activity of standard antioxidant such as Ascorbic acid. The DPPH antioxidant assay percentage is 60.33 В± 0.25 8.3.6 Antioxidant activity of Cucumis setosus leaf Cucumis setosusThe antioxidant activity of methanol leaf extract of was examined by comparing it to the activity of The ascorbic acid content of the flesh of red-fleshed watermelon (86.32 mg/kg) was the highest (Fig. 1). This value This value was lower than the ascorbic acid contents of red-ripe stage of red-fleshed watermelon cultivars (119.7-204.0 mg/kg)

    as tocopherols , ascorbic acid, carotenoids and plant phenolics. Freeze-drying is known to extend the Freeze-drying is known to extend the shelf-life of foods by preventing the microbial growth and lipid retarding oxidation [14]. The ascorbic acid content of the flesh of red-fleshed watermelon (86.32 mg/kg) was the highest (Fig. 1). This value This value was lower than the ascorbic acid contents of red-ripe stage of red-fleshed watermelon cultivars (119.7-204.0 mg/kg)

    Antioxidant.pdf - Download as PDF File (.pdf), Text File (.txt) or read online. The structure of the antioxidant vitamin ascorbic acid (vitamin C). Research into how vitamin E prevents the process of lipid peroxidation led to the identification of antioxidants as reducing agents that prevent oxidative reactions. Antioxidant activity could be measured simply by placing the fat in a closed The anti-oxidant activity and total phenolic content of alcoholic extracts from seven medicinal plants (Asparagus racemosus, Ocimum sanctum, Cassia fistula, Piper betel, Citrus aurantifolia, Catharanthus roseus , and Polyalthia longifolia) were

    The antioxidant activity of methanol fruit extract of Diplocyclos palmatus was examined by comparing it to the activity of standard antioxidant such as Ascorbic acid. The DPPH antioxidant assay percentage is 60.33 В± 0.25 8.3.6 Antioxidant activity of Cucumis setosus leaf Cucumis setosusThe antioxidant activity of methanol leaf extract of was examined by comparing it to the activity of flavonoids, cinnamic acids, benzoic acids, folic acid, ascorbic acid, tocopherols, tocotrienols etc., are some of the antioxidants produced by the plant for their sustenance.

    Evaluation of Antioxidant Activity of Chalcones and Flavonoids. Both the crude extract and citronellal showed lower antioxidant activity than that of ascorbic acid, gallic acid and quercetin at the concentrations tested. References Trongtokit, Y., Rongsriyam, Y., Komalamisra, N. and Apiwathnasorn, C. (2005) Comparative Repellency …, Antioxidant activities, flavonoids, ascorbic acid and phenolic content of Malaysian vegetables Article (PDF Available) in Journal of medicinal plant research 4(10):881-890 · April 2010 with 318 Reads.

    Antioxidant Activity of the Aqueous Extracts of Spicy Food

    antioxidant activity of ascorbic acid pdf

    ROLE OF ASCORBIC ACID IN Ijpaes. Impact of ascorbic acid and О±-tocopherol on antioxidant activity of flax cultivars under salinity stress Acta biol. Colomb., 20(2):209-222, mayo - agosto de 2015 - 211, Impact of ascorbic acid and О±-tocopherol on antioxidant activity of flax cultivars under salinity stress Acta biol. Colomb., 20(2):209-222, mayo - agosto de 2015 - 211.

    Ascorbic Acid Concentration and Total Antioxidant Activity

    antioxidant activity of ascorbic acid pdf

    (PDF) Ascorbic Acid Total Phenol Content and Antioxidant. ascorbic acid content, and for woody portion index (wpi). Antioxidant activity ranged from 64.54 to 75.12% and ascorbic acid was Antioxidant activity ranged from 64.54 to 75.12% and ascorbic acid … antioxidant activity, phenolic, flavonoid and ascorbic acid contents of commonly consumed vegetables in Nigeria and identify which of these vegetables has the highest.

    antioxidant activity of ascorbic acid pdf

  • (PDF) Ascorbic Acid Total Phenol Content and Antioxidant
  • Transdermal Delivery of Vit c Antioxidant Vitamin C

  • AA is a small antioxidant molecule, vitamin C (L-ascorbic acid), fulfils essential metabolic functions in the life of animals and plants. It is found in plants, animals and single cell organisms. Keywords: orange, plum, antioxidant activity, ascorbic acid, acetonic extract, alcoholic extract _____ 1. Introduction Fruits play an important role as protective foods, with therapeutic effects appreciated since antiquity. Today it is known that populations that have a

    Both the crude extract and citronellal showed lower antioxidant activity than that of ascorbic acid, gallic acid and quercetin at the concentrations tested. References Trongtokit, Y., Rongsriyam, Y., Komalamisra, N. and Apiwathnasorn, C. (2005) Comparative Repellency … antioxidant activity, phenolic, flavonoid and ascorbic acid contents of commonly consumed vegetables in Nigeria and identify which of these vegetables has the highest

    activity, hydroxyl group reducing activity, estimation of Ascorbic Acid. In DPPH radical scavenging method the In DPPH radical scavenging method the free radicals, 2, 2- diphenyl - 1- picrylhydroazyl (DPPH) was used to find antioxidant (scavenging) activity of The ascorbic acid content of the flesh of red-fleshed watermelon (86.32 mg/kg) was the highest (Fig. 1). This value This value was lower than the ascorbic acid contents of red-ripe stage of red-fleshed watermelon cultivars (119.7-204.0 mg/kg)

    Ascorbic acid solution is easily oxidized to the diketo form referred to as dehydroascorbic acid, which can easily be converted into oxalic acid, diketogulonic acid or threonic acid 86,87. Antioxidants have aromatic ring structures and are able to delocalize theunpaired electron. 75 SRIPAKDEE et al., Orient. J. Chem., Vol. 33(1), 74-86 (2017) and ascorbic acid are the two major contributors to the total antioxidant activity in vegetable and fruit.

    The effects of ascorbic acid and α-tocopherol on the antioxidant activity of 15 phenolic compounds were compared with 2 in vitro assays. Combination of ascorbic acid or α-tocopherol plus polyphenolic compounds resulted in an additive effect as shown with DPPH–HPLC method. With the liposome oxidation method, combination of quercetin or catechins plus α-tocopherol showed synergistic effects. Antioxidant activity showed high correlations with levels of TSP compounds (r ) 0.96) but low correlations with levels of ascorbic acid (r) 0.35 and 0.23 for ORAC and DPPH data, respectively). The antioxidant activities evaluated by both ORAC and DPPH showed similar trends where red guava

    Impact of Non-Thermal Processing on Antioxidant Activity, Phenolic content, Ascorbic Acid content and Color of Winter Melon Puree Abstract In the last decade, non-thermal processing for inactivating microorganisms has been developed in response to the worldwide interest for more fresh and improved quality of food products. Winter melon is a very perishable fruit, hence, processing into puree Antioxidant Activity of Tocopherols, Ascorbyl and Ascorbic Acid and Their Mode of Action W.M. CORT, Product Development Department, Hoffmann-La-Roche Inc.,

    leaf DW (AEAC, ascorbic acid equivalent antioxidant activity). Total phenolics were also measured and ex- Total phenolics were also measured and ex- pressed as gallic acid equivalents (GAE, mg of gallic acid per gram of leaf DW) (Gao et al. 2000). Antioxidant Activity of Tocopherols, Ascorbyl and Ascorbic Acid and Their Mode of Action W.M. CORT, Product Development Department, Hoffmann-La-Roche Inc.,

    account for the higher antioxidant activity of commercial juices compared to the experimental ones. In addition, anthocyanins, ellagic acid derivatives, and hydrolyzable tannins were detected and quantified in the pomegranate juices. sample in comparison with ascorbic acid (vitamin C), gallic acid and quercetin. In this assay, the antioxidant ac- In this assay, the antioxidant ac- tivities were highest for ascorbic acid (IC

    In plasma, uric acid and ascorbic acid together contribute around 80% of the total antioxidant activity, which is around 1000 ОјM, the rest being largely vitamin E, bilirubin, and protein. 18 19 20 31 In tears, uric acid and ascorbic acid account for around half the total antioxidant activity. The objective of this study was to quantify the content of total phenolics, total betalains, ascorbic acid and antioxidant activity found in the juice, pulp and rind of the two commercial varieties of prickly pear

    Determination of total phenolics and ascorbic acid related to an antioxidant activity and thermal stability of the Mao fruit juice Abstract This study was aimed to determine total phenolics and ascorbic acid in association with their antioxidant activity and thermal stability. Both total phenolics and ascorbic acid contents of the mao juice were 337.52 mg GAE/100 mL and 175.34 mg/100 mL antioxidant activity, phenolic, flavonoid and ascorbic acid contents of commonly consumed vegetables in Nigeria and identify which of these vegetables has the highest

    Impact of Non-Thermal Processing on Antioxidant Activity, Phenolic content, Ascorbic Acid content and Color of Winter Melon Puree Abstract In the last decade, non-thermal processing for inactivating microorganisms has been developed in response to the worldwide interest for more fresh and improved quality of food products. Winter melon is a very perishable fruit, hence, processing into puree IN VITRO ANTIOXIDANT AND FREE RADICAL SCAVENGING STUDIES OF ALCOHOLIC EXTRACT OF MEDICAGO SATIVA L. M 5 In vitro antioxidant and free radical scavenging studies 19 DPPH Model 0 20 40 60 80 100 120 2 4 8 1 6 3 2 6 4 12 2 56 5 12 1 000 Concentration (Вµg/ml) % Scavenging Ethanolic extract Ascorbic acid Fig. 1. Antioxidant activity of different concentrations of alcoholic extract and ascorbic

    The ascorbic acid and total phenolic content to antioxidant activity of fresh juices of four ripe and unripe citrus fruits namely Citrus limon, C. reticulata, C. sinensis and C. aurantium were Antioxidant activities, flavonoids, ascorbic acid and phenolic content of Malaysian vegetables Article (PDF Available) in Journal of medicinal plant research 4(10):881-890 В· April 2010 with 318 Reads