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Gursoy, Nevcihan,Sihoglu-Tepe, Arzuhan,Tepe, Bektas The Korean Society of Food Science and Nutrition 2009 Journal of medicinal food Vol.12 No.3
The aerial parts of Ziziphora clinopodioides, Cyclotrichium niveum, and Mentha longifolia ssp. typhoides var. typhoides were screened for their possible antioxidant and antimicrobial activities in addition to their penolic contents. Antioxidant activity was employed by two complementary test systems: 2,2'-diphenyl-1-picrylhydrazyl free radical scavenging and $\beta$-carotene/linoleic acid. In the first case, Z. clinopodioides was superior to the other species with a 50% inhibitory concentration value of $37.73\;{\pm}\;1.18\;{\mu}g/mg$. Similar results were obtained from the b-carotene/linoleic acid system. Inhibition capacity of the linoleic acid of Z. clinopodioides was $83.56\;{\pm}\;1.19%$. Additionally, antioxidant activities of butylated hydroxytoluene, curcumin, and ascorbic acid were determined in parallel experiments. Methanol extracts obtained from the plants studied were found to have moderate antimicrobial activity against all microorganisms tested. In general, Z. clinopodioides extract exhibited stronger activity than the other extracts. On the other hand, Acinetobacter lwoffii and Candida krusei were the most sensitive microorganisms for the all extracts. The amount of the total phenolics was highest in Z. clinopodioides extract ($129.55\;{\pm}\;2.26\;{\mu}g/mg$), followed by M. longifolia ssp. typhoides var. typhoides ($93.47\;{\pm}\;1.84\;{\mu}g/mg$). It is extremely important to note that there is a positive correlation between antioxidant activity potential and amount of phenolic compounds.
Nevcihan Gursoy,Arzuhan Sihoglu-Tepe,Bektas Tepe 한국식품영양과학회 2009 Journal of medicinal food Vol.12 No.3
The aerial parts of Ziziphora clinopodioides, Cyclotrichium niveum, and Mentha longifolia ssp. typhoides var. typhoides were screened for their possible antioxidant and antimicrobial activities in addition to their penolic contents. Antioxidant activity was employed by two complementary test systems: 2,2′-diphenyl-1-picrylhydrazyl free radical scavenging and β-carotene/linoleic acid. In the first case, Z. clinopodioides was superior to the other species with a 50% inhibitory concentration value of 37.73±1.18μg/mg. Similar results were obtained from the β-carotene/linoleic acid system. Inhibition capacity of the linoleic acid of Z. clinopodioides was 83.56±1.19%. Additionally, antioxidant activities of butylated hydroxytoluene, curcumin, and ascorbic acid were determined in parallel experiments. Methanol extracts obtained from the plants studied were found to have moderate antimicrobial activity against all microorganisms tested. In general, Z. clinopodioides extract exhibited stronger activity than the other extracts. On the other hand, Acinetobacter lwoffii and Candida krusei were the most sensitive microorganisms for the all extracts. The amount of the total phenolics was highest in Z. clinopodioides extract (129.55±2.26μg/mg), followed by M. longifolia ssp. typhoides var. typhoides (93.47±1.84μg/mg). It is extremely important to note that there is a positive correlation between antioxidant activity potential and amount of phenolic compounds.
Nevcihan Gursoy,Cengiz Sarikurkcu,M. Halil Solak,Bektas Tepe 한국식품과학회 2010 Food Science and Biotechnology Vol.19 No.3
The methanolic extracts of Ramaria flava,Rhizopogon roseolus, and Russula delica were analyzed for their antioxidant activities in different test systems including β-carotene/linoleic acid, 1.1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging, reducing power, and metal chelating activities in addition to their total phenolic and flavonoid contents. In the first case,methanol extract of R. roseolus showed the strongest activity. In DPPH system, the scavenging effects increased with the concentration. The reducing power of the mushroom also increased with concentration. Chelating effect was 96.75±0.28% for R. flava. In the case of total phenolic and flavonoid assays, R. flava found to have the highest phenolic content. Total flavonoid content of R. flava again found the superior to the other mushrooms. Experimental results indicate that the mushroom species evaluated here can be consumed safely. On the other hand, knowing the biological activity of these mushrooms will contribute to the establishment of conscious consumption.