Browsing by Author "Benli, Mehlika"

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Antimicrobial Activity of Various Extracts of Ocimum Basilicum L. and Observation of the Inhibition Effect on Bacterial Cells by Use of Scanning Electron Microscopy
(African Networks Ethnomedicines, 2008) Kaya, Ilhan; Yigit, Nazife; Benli, Mehlika
The antimicrobial activities of chloroform, acetone and two different concentrations of methanol extracts of Ocimum basilicum L. were studied. These extracts were tested in vitro against 10 bacteria and 4 yeasts strains by the disc diffusion method. The results indicated that the methanol extracts of O. basilucum exhibited the antimicrobial activity against tested microorganisms. While the chloroform and acetone extracts had no effect, the methanol extracts showed inhibition zones against strains of Pseudomonas aeruginosa, Shigella sp., Listeria monocytogenes, Staphylococcus aureus and two different strains of Escherichia coli. The cells of microorganisms, which were treated and untreated with plant extracts, were observed by using the scanning electron microscope. It was observed that the treated cells were damaged.
Antimicrobial Activity of Various Extracts of Satureja Hortensis L
(2007) Kayhan, Nazife Yiğit; Benli, Mehlika; Kaya, İlhan
The antimicrobial activities of ethyl acetate and methanol extracts of Satureja hortensis L. were studied. These extracts were tested in vitro against 10 bacterial species, 4 yeasts species and strains by the disc diffusion method. The results indicated that the methanol extract of S. hortensis is more effective against tested microorganisms than ethyl acetate. While ethyl acetate extract showed inhibition effect against Pseudomonas aeruginosa (ATCC 27853) and Bacillus subtilis (RSHI), methanol extract affected Bacillus subtilis (RSHI), Escherichia coli (ATCC 25922), Shigella (RSHI), Staphylococcus aureus (ATCC 29213) and Pseudomonas aeruginosa (ATCC 27853). The cells of microorganisms treated with plant extracts and normal microorganism cells were observed by scanning electron microscope. It was apparent that cells after treated with S. hortensis are damaged.
The Effect of Using an Exopolysaccharide-Producing Culture on the Physicochemical Properties of Low-Fat and Reduced-Fat Kasar Cheeses
(Wiley, 2013) Sanli, Tuba; Gursel, Asuman; Sanli, Ebru; Acar, Esra; Benli, Mehlika
A mixed starter culture containing exopolysaccharide (EPS)-producing strains of Streptococcus thermophilus and Lactobacillus delbrueckii subsp. bulgaricus was combined with Lactobacillus helveticus LH301 and used in the manufacture of low-fat and reduced-fat Kasar cheeses. For comparison, low-fat (C10) and reduced-fat (C20) cheeses were made using EPS-producing (EPS+) starter strain and EPS-non-producing (EPS-) starter strain. The physicochemical properties of the cheeses were assessed in terms of chemical composition, texture, microstructure and microbial content over 90days. Cheeses made with EPS-producing culture (EPS10 and EPS20) had lower protein contents than control cheeses with 10% and 20% fat in dry basis (C10 and C20). Scanning electron microscopy images showed that using EPS-producing culture resulted in a less compact protein matrix and sponge-like structure in the cheese samples. In general, cheeses made using EPS-producing culture had lower total viable counts. This could be related to the reduced survivability of EPS-producing cells in the cheese matrix during ripening due to autolysis ability.
Investigation of Palinological Features of Taxa Belonging To the Genus Cuscuta Distributed in Turkey
(Friends Science Publ, 2017) Demir, Ibrahim; Kaya, Ilhan; Benli, Mehlika; Altinoglu, Mustafa Kemal
In this study the species belonging to Cuscuta L. genus showing the distribution of agricultural and non-agricultural lands in Turkey was examined palynological perspective. This study was carried out between the years 2013-2015. The pollen morphology of 15 taxa of Cuscuta, including C. campestris Yunck., C. hyalina Roth., C. lupuliformis Krock., C. monogyna Vahl subsp. monogyna, C. monogyna Vahl subsp. esqumata (Englm.) Plitm., C. kotschyana Boiss. subsp. caudata Bornm & Schwarz, C. babylonica Aucher ex Choisy var. babylonica, C. babylonica Aucher ex Choisy var. elegans (Boiss. & Bal.) Englm., C. europaea L., C. kurdica Engelm., C. epithymum L., C. brevistyla A. Braun ex A. Rich., C. planiflora Ten., C. approximata Bab. var. approximata, and C. approximata Bab. var. macranthera (Boiss.) Feinbr. & Greuter was investigated by using scanning electron microscope (SEM). C. campestris and C. brevistyla species were found 3 (-4) zonocolpate, C. planiflora 3 (-6) zonocolpate. Pollen structure of taxa belonging to Cuscuta L. genus were determined prolate, subprolate, perprolate and prolate-spheroidal. The apertures of the pollens of these taxa were found scabrate, scabrate-perforate, oscabrate-perforate, reticulate and ekinate-reticulate. It was concluded that the pollen characteristics are convenient and a reliable method in identifying species. (C) 2017 Friends Science Publishers
Screening Antimicrobial Activity of Various Extracts of Artemisia Dracunculus L
(Wiley, 2007) Benli, Mehlika; Kaya, Ilhan; Yigit, Nazife
The antimicrobial activities of chloroform, acetone and two different concentrations of methanol extracts of Artemisia dracunculus L. were studied. These extracts were tested against nine bacteria and four yeasts strains by the disc diffusion method. The results indicated that the methanol extract of A. dracunculus is more effective against tested microorganisms than chloroform or acetone extracts. The chloroform and acetone extracts were inhibitory only towards Pseudomonas aeruginosa (ATCC 27853). While the methanol extract that was diluted with 10 ml distilled water showed inhibition zones against Shigella (RSHI), Listeria monocytogenes ATCC 7644, R. aeruginosa (ATCC 27853), the methanol extract that was diluted with 5 ml distilled water showed inhibition zones against two different strains of Escherichia coli (RSHI, ATCC 25922), Shigella (RSHI), L. monocytogenes (ATCC 7644), and P. aeruginosa ATCC 27853. The cells of microorganisms treated with plant extracts and normal microorganism cells were observed by scanning electron microscope. It was apparent that cells are damaged after treatment with A. dracunculus. Copyright (C) 2006 John Wiley & Sons, Ltd.
Türkiye de Kayıtlı Olan Cuscuta Cinsine Ait Türlerin Polen Morfolojisi ve Filogenetik İlişkilerinin Belirlenmesi
(2016) Sipahioğlu, H. Murat; Kaya, İlhan; Tepe, Işık; Demir, İbrahim; Keskin, Fatma; Nemli, Yıldız; Benli, Mehlika