@article{Proestos2013b,

title = {Determination of Plant Bioactive Compounds. Antioxidant Capacity and Antimicrobial Screening},

author = {C. Proestos and P. Zoumpoulakis and V.J. Sinanoglou

},

year  = {2013},

date = {2013-10-09},

journal = {Focusing on Modern Food Industry (FMFI)},

volume = {2},

issue = {1},

pages = {26-35},

abstract = {It is well known that bioactive compounds such as polyphenols are constituents of many plants and herbs, and they have attracted a great deal of public and scientific interest because of their health-promoting effects and of their potential applications in foods as antioxidants and antimicrobial agents. Selected plants of interest in traditional diets were examined in order to determine their phenolic composition, antioxidant capacity and antimicrobial activity. Reversed phase high performance liquid chromatography coupled with DAD was employed for the identification and quantification of polyphenols. The phenolic substances were identified and quantified after comparison with reference standards. Catechin, ferulic acid and quercetin were the main polyphenol compounds. The antioxidant capacity of the extracts and of the isolated polyphenol compounds were determined with the Rancimat test using sunflower oil as substrate (the PF factor was determined), the FRAP assay and the DPPH assay (IC50). All plants and isolated compounds exhibited antioxidant capacity. The antimicrobial activity of the extracts against selected microorganisms was also investigated using the disc diffusion method. The plants Pelargonium purpureum and Sideritis scardica exhibited the most potent antimicrobial activity against all selected pathogenic microorganisms such as  E. coli and  L. monocytogenes. These results suggested that the plants selected for this study had properties that required attention for their potential health effect and for possible applications in food products.},

note = {8 ετεροαναφορές},

keywords = {Antimicrobial Activity, DPPH, FRAP Assay, Phenolic Antioxidants, Rancimat test, RP-HPLC},

pubstate = {published},

tppubtype = {article}

}

@article{Proestos2013,

title = {Antioxidant Capacity of Selected Plant Extracts and Their Essential Oils},

author = {C. Proestos and K. Lytoudi and O.K. Mavromelanidou and P. Zoumpoulakis and V.J. Sinanoglou},

doi = {10.3390/antiox2010011},

issn = {2076-3921},

year  = {2013},

date = {2013-10-03},

journal = {Antioxidants},

volume = {2},

pages = {11-22},

abstract = {The main objective of this study was the screening of some selected aromatic plants very popular in Greece, with respect to their total phenolic content, antioxidant capacity, reducing activity, and oxidative stability. All plants were extracted with the conventional method, reflux with methanol. The essential oils of the plants were also analyzed for their antioxidant properties. The total phenolic content was determined by the Folin-Ciocalteu method using gallic acid as the standard, while the phenolic substances were identified and quantified by High Performance Liquid Chromatography (HPLC) coupled with a multi-wavelength ultraviolet-visible (UV-vis) detector. The antioxidant capacity of the plant extracts was measured by their ability to scavenge free radicals such as (a) DPPH (2,2-diphenyl-1-picrylhydrazyl) and, (b) ABTS (2,2'-azinobis-(3-ethylbenzothiaziline-6- sulfonate). The Folin-Ciocalteu method proved the existence of antioxidants in the aromatic plant extracts. Taking into account the results of the DPPH and ABTS methods, the free radical scavenging capacity was confirmed. Eventually, all plants exhibited low but noticeable protection levels against lipid oxidation, as determined by the Rancimat test. },

note = {21 ετεροαναφορές},

keywords = {ABTS, antioxidant capacity, DPPH, essential oils, HPLC-UV/vis, plant extracts, Rancimat test},

pubstate = {published},

tppubtype = {article}

}