scholarly journals Evaluation of antioxidants activity of some tree barks grown in Libya (Al Jabal Al Akhdar) Pinus halepensis Mill, Pistacia lentiscus L, Juniperus phoenicea L

2021 ◽  
Vol 2 (1) ◽  
pp. 060-066
Author(s):  
Ahmed MA Hamad ◽  
Milud A Altaiaf
Keyword(s):  
Pinus Halepensis ◽  
Antioxidant Properties ◽  
Pistacia Lentiscus ◽  
Chelating Activity ◽  
Metal Chelating ◽  
Metal Chelating Activity ◽  
Tree Barks ◽  
Juniperus Phoenicea ◽  
Al Jabal Al Akhdar ◽  
Anti Oxidant

The aim of the present study investigated anti-oxidant activity of various methanol-water extracts from tree barks grown in Libya (Al Jabal AL Akhdar) by four anti-oxidant assays FRAP. DPPH. H2O2 and Metal chelating activity. Additionally, these antioxidant activities were compared with BHA, BHT as reference antioxidants. Tree bark has a large, diverse class of compounds, many with antioxidant properties. This study showed FRAP inhibitory activity of the Pinus halepensis bark extracts 56.8%, while Juniperus phoenicea L 57.6%, and Pistacia lentiscus L bark extracts was 69.2% The DPPH radical scavenging in the bark extracts exerted an inhibition of 66.8 %, 62.3% ,74.6% for Pinus halepensis, Juniperus phoenicea and Pistacia lentiscus L respectively. While H2O2 activity shows variation, ranging from 67. 8 to 81. 3%. The Metal chelating activity of the barks extract was 59% in Pinus halepensis and 57% in Juniperus phoenicea L bark extracts furthermore Pistacia lentiscus L was 67.8% in addition the Metal chelating activity of BHT and BHA 92%, 94% respectively. The high antioxidant activity of bark was founded in Pistacia lentiscus L bark extracts.

Functional and Antioxidant Properties of Angelwing Clam (Phplas orientalis) Hydrolysate Produced using Alcalase

2014 ◽  
Vol 11 (1) ◽  
pp. 29
Author(s):  
Nonnah Ismail ◽  
Juliana Mahmod ◽  
Awatif Khairul Fatihin Mustafa Kamal
Keyword(s):  
Antioxidant Properties ◽  
Enzyme Concentration ◽  
Degree Of Hydrolysis ◽  
Emulsifying Properties ◽  
Hydrolysis Time ◽  
Chelating Activity ◽  
Metal Chelating ◽  
Metal Chelating Activity ◽  
Intermediate Concentration ◽  
As Solubility

In this study, Hydrolysate from angelwing clam (Pholas orientalis) was produced at 0, 1, 2 and 3 hrs and E/S ratio of0.5 and 3%using alcalase where the pH and temperature were kept constant at pH 8.5 and 60°C, respectively. The hydrolysates were analysed for antioxidant and functional properties such as solubility, emulsifying properties and water and oil holding capacity. Degree of hydrolysis (DH), yield, functional and antioxidant properties were influenced by the hydrolysis time and E/S ratio. Higher enzyme concentration (E/S 3%) and longer hydrolysis time increased the DH. Yield was higher at E/S 3% but reduced with hydrolysis time. Longer hydrolysis time produced more soluble hydrolysate and higher metal chelating activity but lower in emulsifying properties and DPPH activity. Higher enzyme concentration resulted in increase only in solubility and metal chelating activity. This study revealed that enzymatic hydrolysis using alcalase should be performed at shorter hydrolysis time using intermediate concentration of enzyme (E/S between 0.5 to 3%) in order to produce angelwing clam hydrolysate with collectively good functional and antioxidant properties. 

Functional and Antioxidant Properties of Angelwing Clam (Pholas orientalis) Hydrolysate Produced using Alcalase

2014 ◽  
Vol 11 (1) ◽  
pp. 29
Author(s):  
Normah Ismail ◽  
Juliana Mahmod ◽  
Awatif Khairul Fatihin Mustafa Kamal
Keyword(s):  
Antioxidant Properties ◽  
Enzyme Concentration ◽  
Degree Of Hydrolysis ◽  
Emulsifying Properties ◽  
Hydrolysis Time ◽  
Chelating Activity ◽  
Metal Chelating ◽  
Metal Chelating Activity ◽  
Intermediate Concentration ◽  
As Solubility

In this study, hydrolysate from angelwing clam (Pholas orientalis) was produced at 0, 1, 2 and 3 hrs and E/S ratio of 0.5 and 3% using alcalase where the pH and temperature were kept constant at pH 8.5 and 60°C, respectively. The hydrolysates were analysed for antioxidant and functional properties such as solubility, emulsifying properties and water and oil holding capacity. Degree of hydrolysis (DH), yield, functional and antioxidant properties were influenced by the hydrolysis time and E/S ratio. Higher enzyme concentration (E/S 3%) and longer hydrolysis time increased the DH. Yield was higher at E/S 3% but reduced with hydrolysis time. Longer hydrolysis time produced more soluble hydrolysate and higher metal chelating activity but lower in emulsifying properties and DPPH activity. Higher enzyme concentration resulted in increase only in solubility and metal chelating activity. This study revealed that enzymatic hydrolysis using alcalase should be performed at shorter hydrolysis time using intermediate concentration of enzyme (E/S between 0.5 to 3%) in order to produce angelwing clam hydrolysate with collectively good functional and antioxidant properties.

scholarly journals Effect of packaging on phenols, flavonoids and antioxidant characteristics of mechanical cabinet dried wild pomegranate (Punica granatum L.) arils

2021 ◽  
Vol 13 (1) ◽  
pp. 101-109
Author(s):  
Abhimanyu Thakur ◽  
NS Thakur ◽  
Hamid ◽  
Sunakshi Gautam
Keyword(s):  
Antioxidant Activity ◽  
Reducing Power ◽  
Punica Granatum ◽  
Total Phenols ◽  
Antioxidant Power ◽  
Chelating Activity ◽  
Metal Chelating ◽  
Temperature Conditions ◽  
Metal Chelating Activity ◽  
Punica Granatum L

Wild pomegranate (Punica granatum L.) fruit arils with high acid content are processed into dried arils (anardana) which is used as an ingredient in various medicinal formulations and culinary preparations. The various phenols and flavonoids are responsible for the antioxidant activity of anardana which signifies its functional benefits. The advanced packaging techniques like vacuum packaging, can retain higher antioxidant activity characteristics during storage. So, the present studies were carried out to compare the effect of packaging on total phenols, flavonoids, DPPH (2, 2-diphenyl-1-picrylhydrazyl) antioxidant activity, metal chelating activity, FRAP (ferric reducing antioxidant power) and reducing power of anardana prepared in mechanical cabinet drier. Anardana was packed in different packaging materials and stored under ambient and refrigerated temperature conditions. The overall effect of storage during 12 months revealed that there was a significant (p< 0.05) decrease in total phenols (180.95 to 161.76 mg GAE/100 g), flavonoids (40.60 to 32.66 mg QuE/100 g), DPPH antioxidant activity (61.23 to 56.13%), metal chelating activity (22.25 to 19.37%), FRAP (34.60 to 31.73 ?M Fe2+/100 g) and reducing power (0.610 to 0.521) which was observed less in anardana packed in ALPV (aluminium laminated pouches with vacuum) followed by ALP (aluminium laminated pouches) and gunny bags. Due to slower rates of degradation of various antioxidant compounds, the changes after 12 months of storage were lower under refrigerated conditions. The total phenols, flavonoids and DPPH antioxidant activity were reduced  from 180.95 to 167.24 and 156.28 mg GAE/100 g, 40.60 to 34.95 and 30.37 mg QuE/100 g and 61.23 to 57.99 and 54.27 % in refrigerated and ambient temperature conditions, respectively.

scholarly journals Evaluation of Functional, Nutritional and Bioactive Properties of Gluten Free Muffins Utilizing Industrial By-Products of Baby Corn

2021 ◽  
pp. 1-6
Author(s):  
Kaur Kamaljit ◽  
Sharma Anchit
Keyword(s):  
Finger Millet ◽  
Antioxidant Properties ◽  
Pasting Properties ◽  
Total Phenol Content ◽  
Gluten Free ◽  
Corn Flour ◽  
Chelating Activity ◽  
Metal Chelating ◽  
Bioactive Properties ◽  
By Products

This study was planned to utilize by-products of baby corn, which was powdered upon drying. Different formulations containing baby corn: defatted soya: plantain: finger millet flours at 10:65:20:5, 15:55:20:10, 20:45:20:15 and 25:35:20:20 were prepared and analyzed for functional, nutritional and bioactive properties of the blended flours and muffins. The outcomes indicated that incorporation of baby corn flour had enhanced functional and pasting properties of the blended flours. The addition of baby corn flour increased the antioxidant properties and metal chelating activity of blended flours. The incorporation of baby corn flour had contributed better retention of antioxidant potential during baking as muffins with 25% baby corn showed more increase in antioxidant properties than 10% baby corn muffins. Hardness and specific volume of muffins increased, while total phenol content decreased significantly with increment in the level of baby corn flour. On the basis of sensory analysis muffins prepared with 20% level of baby corn flour was selected best. This study concluded that by-products of baby corn can be utilized for development of gluten free muffins with better nutrition and bioactive properties.

In vitro cytotoxicity, antimicrobial, and metal-chelating activity of triterpene saponins from tea seed grown in Kangra valley, India

2012 ◽  
Vol 22 (8) ◽  
pp. 4030-4038 ◽  
Author(s):  
Robin Joshi ◽  
Swati Sood ◽  
Poonam Dogra ◽  
Madhvi Mahendru ◽  
Dharmesh Kumar ◽  
...  
Keyword(s):  
In Vitro Cytotoxicity ◽  
Triterpene Saponins ◽  
Chelating Activity ◽  
Metal Chelating ◽  
Metal Chelating Activity

scholarly journals Foliar anti-diabetic and antioxidant potential of a promising accession of Amaranthus hypochondriacus L.: GC-MS based evidences

2018 ◽  
Vol 7 (2) ◽  
pp. 121-126
Author(s):  
Manashi Aditya ◽  
◽  
Soumen Bhattacharjee ◽  
Keyword(s):  
Lipid Peroxidation ◽  
Hydroxyl Radical ◽  
Leaf Extract ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Antioxidant Potential ◽  
Amaranthus Hypochondriacus ◽  
Chelating Activity ◽  
Metal Chelating

The present study makes an effort to investigate the foliar neutraceutical potential of a promising green accession of a seed amaranth (Amaranthus hypochondriacus, accession no. IC94661) based on anti-lipid peroxidation property, reducing power, metal chelating activity, hydroxyl radical scavenging property, antidiabetic factor and GC-MS based identification of hydroxyl containing phytochemicals. Methanol and aqueous fractions possessed exhibited better anti-lipid peroxidation, reducing, hydroxyl radical scavenging, and metal chelating properties in the experimental accession. Estimation of anti-diabetic factors from the young leaf extract also revealed significantly high α-glucosidase and α- amylase inhibition properties. When GC-MS study was carried out, it exhibited presence of several hydroxyls containing phytochemicals in the accession, some of which are having antioxidant properties. Taken as a whole, the data not only provide evidence of rich sources of marker antioxidant properties but also the availability of several phytochemicals with hydroxyls, in support of its rich pharmaceutical potential

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