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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Screening of various solvents and extracts of Achillea latiloba Ledeb. ex Nordm for antibacterial and antifungal activities

100%
Erturk O.
Herba Polonica
|
2014
|
tom 60
|
nr 2
In this study the antibacterial and antifungal activities of extracted Achillea latiloba Ledeb. ex Nordm (Asteraceae) samples in acetone, ethyl acetate, ethanol, methanol and dimethyl sulfoxide (DMSO) from Trabzon Province (Turkey) were investigated. Antimicrobial activity of A. latiloba varied depending on the extract of samples, dosage of extracts, and the extraction solvents for all test microorganisms. Staphylococcus aureus, Streptococcus salivarius, Klebsiella pneumoniae, Escherichia coli, Salmonella enteritidis, Streptococcus pneumoniae, Bacillus cereus, Listeria monocytogenes, Streptococcus mutans, Pseudomonas aeruginosa, Bacillus licheniformis, Micrococcus luteus, Bacillus subtillis, Proteus vulgaris and Candida albicans were studied with use of disc diffusion and agar dilution method. The results indicated that each of the crude extracts of Achillea latiloba exhibited a more or less pronounced antibacterial and antifungal potency both in Gram-positive and Gram-negative bacteria and fungi. While in the Gram-negative group, the most sensitive microorganism to Achillea latiloba were S. enteritidis and Streptococcus mutans which is Gram-positive. In the Gram-positive group, the microorganisms most sensitive to Achillea latiloba were Streptococcus mutans and L. monocytogenes. However, the least sensitive microorganism was P. vulgaris. The results presented in this paper suggest that Achillea latiloba possesses additional antimicrobial activities that has an effect against some Gram-negative, Grampositive bacteria and fungi.
2
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Antibacterial and antifungal effects of acetone extracts from fifty spice and herb plants

63%
Demirkol G., Erturk O.
Herba Polonica
|
2019
|
tom 65
|
nr 3
3

Isolation, identification and insecticidal effects of entomopathogenic bacteria from the willow flea beetle, Crepidodera aurata (Coleoptera; Chrysomelidae)

63%
Yaman M., Erturk O.
Progress in Plant Protection
|
2016
|
tom 56
|
nr 2
4

Antifeedant and toxicity effects of some plant extracts on Yponomeuta malinellus Zell. [Lep.: Yponomeutidae]

51%
Erturk O., Sekeroglu V., Koc A., Kalkan Y.
Journal of Plant Protection Research
|
2004
|
tom 44
|
nr 3
165-174
The insecticidal and antifeedant activity of extracts derived from different plants of the Liguidamber orientalis Mill. (Hamamelidaceae), Tanacetum vulgare L. (Compositae), Achillea coarctata Willd. (Compositae), Buxus sempervirens L. (Buxaceae), Diospyros kaki L. (Ebenaceae), Arum italicum Mill. (Araceae), Achilea biebersteinii Willd. (Compositae), Origanum vulgare L. (Labiatae), Hypericum androsaemum L. (Hypericaceae) and Ocimum basilicum L. (Labiatae). are reported. The 70% alcohol extracts of plants were tested for toxicity against the 3–4th instar larvae of the Yponomeuta malinellus Zell. (Lepidoptera.: Yponomeutidae). Antifeedant activity of the extracts was assessed through tests conducted on the larvae of Y. malinellus by the feeding protection bioassay. In tests carried out on the larvae of Y. malinellus, L. orientalis, O. basilicum and A. coarctata extracts showed high toxicity within 48 hour LC50’s of 75, 75 and 65% respectively. The toxicity effects of the other extracts were determined as 60, 50, 50, 50, 45, 45 and 40% within the same period, respectively. No mortality was noticed in control groups. Alcohol extract from L. orientalis, T. vulgare and B. sempervirens showed high antifeedant activity (80.90, 46.12) on the larvae of Y. malinellus. In addition to both T. vulgare and L. orientalis extracts caused decrease consumption of food per 1 mg of larvae body weight decrease showed high –8.465, –0.845, mg respectively. The highest consumption (557.6 mg) was observed with alcohol extract from, D. kaki whereas the minimum one was using alcohol extract from L. orientali. The other tested extracts showed similar activity.
5
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Composition, antioxidant and antimicrobial activities of cold-pressed and distilled essential oils of Origanum onites L. and Lavandula officinalis L. relationships evaluated by SEM microscopy

51%
Erturk O., Aydin G., Ayvaz M. C., Baskan C.
Herba Polonica
|
2020
|
tom 66
|
nr 4
6

Studies of bacteria as microbial control agents of the lackey moth, Malacosoma neustria [Lepidoptera, Lasiocampidae] in Turkey

51%
Yaman M., Erturk O., Demirbag Z.
Bulletin of the Polish Academy of Sciences. Biological Sciences
|
2002
|
tom 50
|
nr 4
7

Antimicrobial activities of some medicinal essential oils

51%
Erturk O., Ozbucak T. B., Bayrak A.
Herba Polonica
|
2006
|
tom 52
|
nr 1-2
In this study, the antimicrobial properties of essential oils obtained from Coriandrum sativum, Foeniculum vulgare Miller, Salvia triloba, Laurus nobilis L., Citrus limon and Origanum smyrnaeum L. were investigated. A total of eight microbial organisms belonging to six species of bacteria, namely Salmonella typhimurium, Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa, Escherichia coli and Enterobacter aerogenes, as well as two fungi, Candida albicans and Aspergillus niger, were studied using a disc-diffusion and agar dilution (minimal inhibition concentration) method. The antimicrobial activity of essential oils obtained from the six plants turned out to be more effective in the case of bacteria than against fungi. The antimicrobial activity against Gram-positive bacteria was more pronounced than against Gram-negative ones. All the investigated plants are known as having healing properties and are used to treat various diseases. The essential oils obtained from L. nobilis and O. smyrnaeum showed the highest antifungal activity against C. albicans and A. niger, while the essential oils obtained from F. vulgare showed the highest antimicrobial activity against P. aeruginosa and E. coli. On the other hand, the essential oils obtained from O. smyrnaeum showed stronger antibacterial activity in the case of E. aerogenes and S. aureus, but were not equally effective against E. coli. The other crude essential oils showed varied levels of antibacterial and antifungal activity. The minimal inhibition concentrations (MIC ) of the essential oils obtained from O. smyrnaeum and of those obtained from L. nobilis ranged from 1.17 to 4.71 mg/ml, and 2.4 to 19.2 mg/ml, respectively.
8
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The antimicrobial and antioxidant activities of extracts obtained from some moss species in Turkey

39%
Erturk O., Sahin H., Erturk E. Y., Hotaman H. E., Koz B., Ozdemir O.
Herba Polonica
|
2015
|
tom 61
|
nr 4
Pharmaceutical industry is forced to develop new pharmacologically active molecules. Like other plants, mosses are considered to be potential source of new biologically active compounds. The present study was designed to evaluate the The antimicrobial and antioxidant activities of extracts obtained from some moss species in Turkey antimicrobial and antioxidant activity of 8 moss species: Hypnum cupressiforme, Homalothecium sericeum, Thuidium delicatulum, Homalothecium lutescens, Homalothecium nitens, Leucodon sciuroides, Ctenidium molluscum, and Eurhynchium striatulum obtained from Turkey. Methods: The antimicrobial activity of extracts was investigated against four Gram (+) and six Gram (–) bacterial strains and three tested fungi. Total phenolic content (TPC), cupric reducing antioxidant capacity (CUPRAC), ferric reducing antioxidant power (FRAP), and DPPH radical scavenging activity assays were applied to determine the antioxidant activity. All moss extacts were found to be active against all the organisms except Homalothecium nitens. Especially, H. sericeum and E. striatulum showed the best antioxidant activity. The obtained results show that mosses may be used as possible natural antioxidant, antimicrobial agents to control various human, animal and plant diseases.
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