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Petrus A.J.A.,Kanchi Mamunivar Center for Post Graduate Studies Autonomous
Asian Journal of Chemistry | Year: 2011

Cancer remains the second most abundant cause of death globally. Traditional herbal medicines possessing antioxidant potentials offer protection against several chronic and predominantly life-style oriented human diseases, including cancer. Mallotus stenanthus, which has been reported to be an anticancer agent against P388 lymphocytic leukaemia in mice, has been evaluated to possess in vitro antioxidant (ABTŜ+ scavenging, FRAP, β-carotene bleaching) capacities and metal chelating abilities. The antioxidant capacities correlated well with the phenolic and flavonoid constitutions. The EtOAc fraction exhibited highest antioxidant capacity, 7-O-β-D-glucopyranosides of diosmetin and chrysoeriol together with ellagic acid, phloroglucinol and its derivatives have been isolated and characterized, substantiating the reported antitumour properties of the leaf extract. Source


Petrus A.J.A.,Kanchi Mamunivar Center for Post Graduate Studies Autonomous
Asian Journal of Chemistry | Year: 2011

Mistletoes are being used in the treatment and management of a number of diseases, both in the traditional and in the complementary medicines, in several cultures. Fresh aerial parts of the obligate epiparasite, Viscum capitellatum Sm., hyperparasiting on the mistletoe Dendrophthoe falcata, a parasite on the terrestrial host, Albizzia lebbeck, was found to possess in vitro antioxidant capacity, as determined by the ABTS•+ and NO scavenging, FRAP and ?-carotene bleaching assays and capable of potentially chelating ferrous ions. Terpenes (lupeol and betulin), terpenic acids (betulinic and oleanolic acids), sterols (spinasterol and β-sitosterol) and carotenoids have been identified as the antioxidant metabolites of the lipophilic fraction and phenolic acids (chlorogenic acid, caffeic acid and p-coumaric acid), 7-hydroxy-3,5,6,3',4'-pentamethoxyflavone, eriodictyol and its 7-O-β-D-glucopyranoside as the predominant antioxidant phytoconstituents of the hydrophilic fractions of the mistletoe extract. Source


Palanisamy V.,Alagappa University | Annadurai P.,Kanchi Mamunivar Center for Post Graduate Studies Autonomous
International Journal of Internet Protocol Technology | Year: 2011

In wireless and distributed nature of ad hoc networks, security has become a more sophisticated problem than security in other networks, due to the open nature and the lack of infrastructure of such networks. TBCMKDS discussed in this paper addresses the key management issues encountered in ad hoc networks. TBCMKDS is inspired by the control, accessibility and scalability characteristic of cluster architecture in distributed systems. The system builds cluster and spans the entire network with different clusters. The nodes within the cluster select a cluster head using degree of neighbours, node identification and trust, mimicking the human neighbour enquiry model. After a detailed analysis on various existing key management schemes, the proposed scheme freezes with the modified version of web of trust approach. elliptic curve cryptography (ECC) is used for key pair and certificate generation, since ECC provides higher security with lesser key size. Copyright © 2011 Inderscience Enterprises Ltd. Source


Petrus A.J.A.,Kanchi Mamunivar Center for Post Graduate Studies Autonomous
Asian Journal of Chemistry | Year: 2012

Mukia maderaspatana (Linn.) M. Roemer, (family : Cucurbitaceae) is a wild functional food plant, traditionally used for human consumption by various cultures. Indigenous communities around the world utilize various parts of the plant to alleviate a number of human and livestock ailments. For the first time, this review attempts to critically assess the global distribution and vernacular names as well as the phytochemical profile and the antioxidant capacity of this potentially medicinal taxon. Source


Petrus A.J.A.,Kanchi Mamunivar Center for Post Graduate Studies Autonomous
Asian Journal of Chemistry | Year: 2014

Plants, in general and functional food plants particularly, have been analyzed to be the rich sources of numerous redox-active secondary metabolites. Phytophenols are undoubtedly the ubiquitous class of bioactive constituents of the human diet manifesting both nutritional and health benefits mediated largely by their redox property, reactive species-scavenging and metal chelating capacities and can mitigate oxidative stress-induced tissue damage associated with chronic diseases. Though the therapeutic potentials and the antioxidant/prooxidant capacities of the individual biophenols are themselves potential topics of debate, an ever-expanding quantum of scientific evidence does tend to support their protective role, via diet, against the presently mushrooming age-related degenerative disorders. The present review attempts to portray the status quo of dietary biophenols in the health and longevity. Source

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