Comparative Study of the Antioxidant Properties of Stevia rebaudiana using cellular approaches

Abstract Drying characteristics of Stevia rebaudiana (Bertoni) leaves using radiation drying, convection drying, sun drying, and shade drying treatments were investigated in a convective type. Results for all treatments indicated that drying took place in the falling rate period. The chroma of the dried samples ranged between 29.66 and 23.85. Convection and shade drying samples were found better in colour and had the highest content of total pigments. The proximate and fibre composition were affected by the drying treatments. Extracts obtained from convection drying and shade drying leaves exhibited higher values of Trolox equivalent antioxidant capacities 416.89-423.64 mM mg−1 and ferric reducing power 85.19-87.97%. These extracts also showed ion chelating capacity 59.05-60.21% for Cu+2 and 55.05-59.11% for Fe+2. The results indicate that it is possible to select the drying treatment to obtain the best nutritional and biological properties. Convection drying and shade drying were the least aggressive treatments and leaf powders obtained by these drying methods could be used as sources of nutrients, fibre, and antioxidant compounds.

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In vitro and in vivo antioxidant properties of ferulic acid: A comparative study with other natural oxidation inhibitors

Food Chemistry ◽

10.1016/j.foodchem.2008.09.073 ◽

2009 ◽

Vol 114 (2) ◽

pp. 466-471 ◽

Cited By ~ 119

Author(s):

S ITAGAKI ◽

T KUROKAWA ◽

C NAKATA ◽

Y SAITO ◽

S OIKAWA ◽

...

Keyword(s):

Comparative Study ◽

Ferulic Acid ◽

Antioxidant Properties ◽

Oxidation Inhibitors

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A comparative study of extraction techniques for maximum recovery of bioactive compounds from Ganoderma lucidum spores

Revista Colombiana de Ciencias Químico Farmacéuticas ◽

10.15446/rcciquifa.v49n1.84456 ◽

2020 ◽

Vol 49 (1) ◽

Author(s):

Diana Carolina Saavedra Plaza ◽

Carlos Ricardo Soccol ◽

Miguel Daniel Noseda ◽

Valcineide Oliveira de Andrade Tanobe ◽

Oranys Marin ◽

...

Keyword(s):

Heat Treatment ◽

Antioxidant Activity ◽

Comparative Study ◽

Ganoderma Lucidum ◽

Antioxidant Properties ◽

Extraction Techniques ◽

Microwave Exposure ◽

Vis Spectroscopy ◽

Spore Walls ◽

Microwave Heat

This study aimed at evaluating effective methods for breaking the hard and insoluble spores of Ganoderma lucidum to recover functional biomolecules. Rupture techniques were evaluated such as manual maceration (RM), maceration with spheres of various materials (BR), and microwave exposure plus maceration with steel/chrome spheres (MBR1). Spore rupture was evaluated using UV-Vis spectroscopy, which showed vibrations of 2955, 1642, 1240, 1080 and 1746 cm-1 corresponding to changes in spore walls. The MBR1 extract contained the largest amounts of carbohydrates (19.80 mg.g-1 spores) and polyphenols (2.21 mg.g-1 spores), whereas the BR extract had higher antioxidant activity (57.22%Inb DPPH). The MBR1 and BR extracts contained 62.2 and 73.5% glucose, respectively. Both methods also involved significant extraction of carbohydrates and proteins. The best way to extract biomolecules from spore walls is to perform a microwave heat treatment and break the walls with steel/chrome spheres; this produces large quantities of carbohydrates with antioxidant properties.

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Anti‐cholinesterase and antioxidant properties of alkaloid and phenolic‐rich extracts from pawpaw ( Carica papaya ) leaf: A comparative study

Flavour and Fragrance Journal ◽

10.1002/ffj.3615 ◽

2020 ◽

Vol 36 (1) ◽

pp. 47-54 ◽

Cited By ~ 1

Author(s):

Bukola C. Adedayo ◽

Sunday I. Oyeleye ◽

Bathlomew M. Okeke ◽

Ganiyu Oboh

Keyword(s):

Comparative Study ◽

Carica Papaya ◽

Antioxidant Properties

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A Comparative Study on Antioxidant Properties of Two Phyllanthus Species Growing in Bangladesh

Dhaka University Journal of Pharmaceutical Sciences ◽

10.3329/dujps.v11i2.14579 ◽

2013 ◽

Vol 11 (2) ◽

pp. 191-197 ◽

Cited By ~ 4

Author(s):

Ishrat Nimmi ◽

Ismet Ara Jahan ◽

M Hemayet Hossain ◽

Mohammad Burhan Uddin ◽

M Sohel Rana ◽

...

Keyword(s):

Comparative Study ◽

Methanol Extract ◽

Antioxidant Activities ◽

Radical Scavenging Activity ◽

Antioxidant Properties ◽

Radical Scavenging ◽

Reducing Power ◽

Test Methods ◽

Total Phenolic ◽

Solvent Volume

A comparative study of antioxidant properties on two varieties of Phyllanthus (Phyllanthus niruiri L. & Phyllanthus urinaria L. leaves) growing in Bangladesh was done in the present study. Five complimentary test methods namely DPPH free radical scavenging activity, reducing power assay, total antioxidant capacity, total phenolic and flavonoid contents determination were used for the evaluation of antioxidant properties of two species of Phyllanthus. In the present investigation for the evaluation of antioxidant activities the concentration is expressed by the ratio of crude sample per solvent volume instead of extract weight per solvent volume. Based on these concentrations the investigated P. niruri L. and P. urinaria L. leaves extracts exhibited significant results. At 2 mg/ml concentration DPPH radical scavenging capacity of the methanol extract of both the plants was found to show significant (>90%) activity which is comparable to Ascorbic acid and BHA. In case of reducing power tests for both the extract, the activity of P. urinaria is comparable to that of BHA and AA and that of P. niruiri is comparable to BHA. P. niruiri showed better antioxidant potential than that of P. urinaria based on the observed results of their corresponding methanol extract. DOI: http://dx.doi.org/10.3329/dujps.v11i2.14579 Dhaka Univ. J. Pharm. Sci. 11(2): 191-197, 2012 (December)

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