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NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
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Research Journals >
Indian Journal of Natural Products and Resources (IJNPR)
[Formerly Natural Product Radiance (NPR)] >
IJNPR Vol.3 [2012] >
IJNPR Vol.3(1) [March 2012] >
| Title: | Comparative evaluation of antioxidant activities of some fresh and preserved herbal products of North East India by cyclic voltammetry |
| Authors: | Boruah, Manas Pratim
Mahanta, Dhrubajyoti
Handique, Jyotirekha G |
| Keywords: | Antioxidant
Bambusa balcooa
Brassica nigra
Comparative evaluation
Cyclic voltammetry
Fresh herbal products
Garcinia morella
Preserved herbal products |
| Issue Date: | Mar-2012 |
| Publisher: | NISCAIR-CSIR, India |
| IPC Code: | Int. cl. (2011.01)- A61K 36/00, A61P 39/06 |
| Abstract: | Antioxidant activities of fresh and preserved forms of three herbal
products, Bambusa balcooa Roxb., Brassica nigra (Linn.) Koch and Garcinia morella Desr., used by the people of North East India have been
evaluated by cyclic voltammetry. The antioxidative effects have been evaluated
by monitoring the change of the oxidation potential in the
redox cycle of 1,4-diaminobenzene in the presence of hexane, ethyl acetate and
methanol extracts of the herbal products. 1,4-Diaminobenzene has two well
defined reversible redox cycles with E1/2 at 218 mV and E1/2
at 535 mV in DMF with the oxidation waves due to formation of a radical cation
and a diiminium dication, respectively. In the presence of herbal extracts
either the oxidation(s) is delayed and/or the radical cation is scavenged as
soon as it is formed. It is reflected by the delayed appearance of the
oxidation waves and disappearance of the second oxidation wave in the cyclic
voltammograms of 1,4-diaminobenzene in the presence of herbal extracts. |
| Page(s): | 40-47 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0976-0512 (Online); 0976-0504 (Print) |
| Source: | IJNPR Vol.3(1) [March 2012]
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