Yazar "Yapici A.N." seçeneğine göre listele

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    Assessment of antimicrobial activity of natural leathers treated with pseudevernia furfuracea (L.) Zopf extracts
    (2013) Türkan M.F.; Aslan A.; Yapici A.N.; Meriçli Yapici B.; Bilgi S.T.
    In the present study, antimicrobial activity of raw skin and chrome-tanned leather samples treated with acetone and chloroform extracts of Pseudevernia furfuracea (L.) Zopf were tested against Bacillus subtilis (ATTC 6633), Bacillus cereus (CCM 99), Staphylococcus aureus (ATCC 6538-P), Escherichia coli (ATCC 11228), Enterococcus faecalis (ATCC 29212), Klebsiella pneumoniae (CCM 2318), Pseudomonas aeruginosa (ATCC 27853), Aspergillus niger, Aspergillus fumigatus, Aspergillus candidus, Aspergillus flavus, Penicillium jensenii, Geotrichum candidum and Candida albicans by the disc diffusion method. The study showed that acetone and chloroform extracts of Pseudevernia furfuracea (L.) Zopf had antimicrobial activity on raw skin and chrome-tanned leather. The inhibition zones of both extracts for the bacteria and fungi tested were found to vary between 11.0 mm to 31.0 mm in raw skins, but between 11.2 mm and 29.0 mm in chrome-tanned leathers.
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    An in vitro assessment of the effectiveness of some bactericides on bacteria isolated from soaking float
    (2009) Yapici A.N.; Yapici B.M.; Karaboz I.; Tozan M.
    In this study, the effectiveness of 5 commercial bactericides commonly used in leather processing was examined in vitro. Bacteria were isolated from soak water by means of proteolytic bacteria culture medium, plate count agar (PCA) and halotolerant bacteria medium containing 10 % NaCl and identified as Gram positive Staphylococcus sp., Diplococcus sp., Micrococcus sp., Corynobacterium sp., Bacillus sp. and Gram negative bacterium. The effectiveness of bactericides was determined in vitro on these bacteria through disc diffusion method. Results were evaluated in comparison with antimicrobial activities of some standard antibiotics on the same microorganisms. It was observed that Derbio DB 99® (bactericide I) was effective on all types of bacteria. Biocide B-7® (bactericide II) was effective on Staphylococcus sp., Diplococcus sp. and Micrococcus sp. It was also observed that Aracit KL® (bactericides III) and Preventol Z-L® (bactericides IV) were effective only against Staphylococcus sp. and Diplococcus sp. On the other hand, Pluscide HP® (bactericides V) did not show enough effectiveness. As a result, it was found out that the most effective bactericide was Bactericide I.
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    Seed germination characteristics of broad bean, lentil and common bean irrigated with different dilutions of pre-tanning effluents
    (2009) Tayyar S.; Yapici A.N.
    Leather manufacturing is a worldwide industry that has been carried out for centuries and has achieved great importance in Turkey. However, the leather industry is associated with the generation of large amounts of waste water and solid wastes that are a threat to the environment. A germination experiment was conducted to determine the effect of different dilutions of pre-tanning effluents on the germination characteristics of broad bean, lentil and common bean. The experiment was designed as a completely randomized block with three replications. Seeds of each species were sown and irrigated with different dilutions of pre-tanning effluents (1:10, 1:40 and 1:80 tap water:effluent), undiluted pre-tanning effluent, and tap water (control). Number of germinated seeds, germination percentage, root length, root weight, shoot length, shoot weight and root+shoot weight were measured at 15 days after planting. All germination properties varied considerably, and significant differences among them were determined (P<0.05). Undiluted pre-tanning effluent had adverse effects and no germination occurred for any of the tested plant materials. Except for the undiluted pre-tanning effluent, no significant differences were detected in the number of germinated seeds and germination percentage, whereas some differences among treatments were observed for the remaining characteristics. © 2009 Asociación Interciencia.