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Mustafa Oskay
Celal Bayar University
31Publications
10H-index
500Citations
Publications 31
Newest
The effects of environmental factors such as temperature, pH , nutrition, osmolarity and antibiotic stress for the determination of culturability and viability on gram negative rod shaped aerobic oxalate bacteria; Cupriviadus oxaliticus Ox1, Oxalicibacterium flavum TA17 T , Xanthobacter sp. NS14 and Cupriavidus necato r NS02 was studied. Colony counts at 30 °C for almost 4 oxalate bacteria were very high whereas optimum growth at 40 and 45 °C was seen for strain TA17 T . Increasing the pH values...
#1Cengiz Sarikurkcu (Süleyman Demirel University)H-Index: 23
#2Gokhan Zengin (Selçuk University)H-Index: 27
Last.Abdurrahman Aktumsek (Selçuk University)H-Index: 27
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Abstract Essential oils (EOs) from Origanum vulgare subsp. vulgare (OVV) and O. vulgare subsp. hirtum (OVH) were evaluated for antioxidant activities (DPPH, ABTS, FRAP, CUPRAC, β-carotene/linoleic acid, phosphomolybdenum and metal chelating), antimicrobial and inhibitory properties against acetylcholinesterase, butrylcholinesterase, tyrosinase, α-amylase and α-glucosidase. Thymol and linalool were identified as major component in OVV and OVH essential oils, respectively. O. vulgare subsp. vulgar...
#1Mustafa Oskay (Celal Bayar University)H-Index: 10
#2Husniye Tansel (Ege University)H-Index: 4
Twenty yeast strains were screened for pectinolytic activity, among the strains, only nine were positive for pectinase production. The best strain was Kluyveromyces marxianus NRRL-Y-1109 which gave high quantities of pectinase activity, by submerged fermentation. Different parameters such as incubation time, pH (3.5-7), temperature (20-45°C), nitrogen and carbon source, were optimized. The optimal incubation time, temperature and pH for pectinase production were found to be 48 h, 30°C and 6, r...
#1Hülya Avcı Özbek (Celal Bayar University)H-Index: 1
#2Pelin Sözen Aktaş (Celal Bayar University)H-Index: 1
Last.Bekir Çetinkaya (Ege University)H-Index: 35
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Abstract The N , N ′-bis(ferrocenylmethyl)imidazolinium chloride ( 3 ) and bromide ( 4 ) were prepared by reaction of N , N’ -bis(ferrocenylmethyl)ethylenediamine ( 2 ) with NH 4 X (X = Cl, Br). The N , N ′-bis(ferrocenylmethyl)imidazolinium tetrafluoroborate ( 6 ) was obtained in two steps from compound ( 2 ). The first step involves the synthesis of N , N ′-bis(ferrocenylmethyl)imidazolidine ( 5 ) by condensation of ( 2 ) with aqueous formaldehyde. Compound ( 5 ) was successfully converted to ...
#1Can Emre Yetgin (Celal Bayar University)H-Index: 1
#2Mustafa Oskay (Celal Bayar University)H-Index: 10
Last.Kadir Ay (Celal Bayar University)H-Index: 3
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Thiosemicarbazones(7–10)/semicarbazones(11–14) were synthesized in good yields via the condensation of α-gluco-, β-gluco-, galacto-, manno- chloralose derived 1,4-furanodialdoses (1-4) with thiosemicarbazide(5)/semicarbazide(6). The structures of all products were characterized by FTIR, NMR spectroscopic methods and elemental analysis. The compounds have been found to display moderate antimicrobial activity against Gram-positive, Gram-negative bacteria and antifungal activity against a Candida a...
#2Tuba GönençH-Index: 4
Last.Mustafa OskayH-Index: 10
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Bu calismada, Tripleurospermum parviflorum (Willd.) Pobed.’nin n-hegzan, metanol, etanol, etil asetat ve su ekstrelerinin, antimikrobiyal ve sitotoksik aktiviteleri degerlendirildi. Ekstrelerin antimikrobiyal aktiviteleri, bakteri olarak Escherichia coli ATCC 29998, Escherichia coli ATCC 25922, Escherichia coli ATCC 11230, Staphylococcus aureus ATCC6538P, Staphylococcus aureus ATCC 29213, Enterobacter cloacae ATCC 13047, Enterococcus faecalis ATCC 29212, Pseudomonas aeroginosa ATCC 27853 ve mant...
The purpose of the present study was concerned with the taxonomy and influences of some cultural conditions on growth and antimicrobial metabolite production of a strain of Streptomyces, designated KGG32, which is a highly stable antimicrobial metabolite producer against the Gram-positive and Gram-negative bacteria under in-vitro growth conditions. In order to optimize the culture conditions for the production of antimicrobial metabolite, such as the effect of different temperatures, nature of c...
#1Mustafa OskayH-Index: 10
Last.Kadir AyH-Index: 3
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Abstract The antimicrobial activities and some chemical properties of the traditional Turkish food called mesir paste were studied. Results of chemical analysis for moisture and volatiles, water-insoluble components, refractive index, soluble solids content, raw fiber, invert sugar, total ash, 5-hydroxymethylfurfural, acidity, and pH were calculated as 17.06%, 2.55%, 1.491, 80.2%, 0.70%, 40.54%, 0.13%, 44 mg/kg, 0.9% anhydrous citric acid, and 3.6, respectively. Mesir paste was extracted individ...
#1Fatih Kalyoncu (Celal Bayar University)H-Index: 10
#2Mustafa Oskay (Celal Bayar University)H-Index: 10
Last.Hüsniye Kayalar (Ege University)H-Index: 5
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In this study, the antioxidant activity of mycelia from 21 wild mushrooms – Agaricus bresadolanus, Auricularia auricula-judae, Chroogomphus rutilus, Fomes fomentarius, Ganoderma lucidum, Gloeophyllum trabeum, Gymnopus dryophilus, Infundibulicybe geotropa, Inocybe flocculosa var. crocifolia, Inocybe catalaunica, Lentinula edodes, Lentinus sajor-caju, Lycoperdon excipuliforme, Macrolepiota excoriata, Morchella esculenta var. rigida, Morchella intermedia, Omphalotus olearius, Pleurotus djamor, Post...
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