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  • Küçük Resim Yok
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    Investigation of physical dirtiness and microbiologic quality of recycled demijohns used in a drinking water filling facility [Bir içme suyu dolum tesisinde kullanilan geri dönüş ümlü damacanalarda fiziksel kirlilikler ve mikrobiyolojik kalitenin incelenmesi]
    (2013) Çetin O.; Çolak H.; Bingöl E.B.; Akhan M.; Hampikyan H.; Turgay S.I.
    This study was planned to determine the microbiological quality and the physical dirtiness in recycled demijohns used in a drinking water filling facility. For this purpose, a total of 388 polycarbonate, recyclable demijohn samples (19 L) were obtained from the facility during the spring and summer seasons (March-August 2009) periodically. All demijohs were examined physically for the presence of dirt, and if present, the dirt samples were analyzed for total mesophilic aerobic bacteria. Additionally, all demijohns were analyzed for the presence of total mesophilic aerobic bacteria, Staphylococcus aureus, Escherichia coli and coliform bacteria. As a result, 91 (23.45%), 8 (2.06%), and 37 (9.53%) out of 388 demijohn samples were found to be contaminated with coliform bacteria, E. coli and, S. aureus respectively. Also, physical dirtiness was detected in 77 (19.84%) samples examined. In conclusion, the physical dirtiness increases the microbiological levels at certain rates in recycled demijohns and also negatively influences the effectiveness of cleaning and disinfection processes. Results of this study indicate that, the recycled polycarbonate demijohns are the main contamination source of water and the hygienic quality of drinking water is closely related with the cleanliness of demijohns.
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    Öğe
    Presence of benzo(a)pyrene in baby foods sold in retail [Perakende olarak satişa sunulan bebek mamalarinda benzo(a)piren varli?i]
    (2013) Çolak H.; Hampikyan H.; Bingöl E.B.; Çetin Ö.; Akhan M.
    Polycyclic aromatic hydrocarbons (PAH) are a large group of organic compounds containing two or more aromatic rings and belonging to food and environment contaminants. PAHs have a widespread distribution in the environment and carcinogenicity and mutagenicity of some of these compounds have been proven. Benzo-a-pyrene is the most known member of the PAH and it is a good marker of carcinogenic PAH levels in food. This study was performed to investigate of benzo(a)pyrene presence in baby foods sold in Istanbul and to evaluate the obtained results according to Turkish Food Codex. For this purpose, a total of 88 baby food samples (33 infant formulas, 29 follow-on formulas, 26 infant and young children foods) were obtained from different supermarkets in Istanbul and the presence of benzo(a)pyrene in the samples was analyzed by means of HPLC. While benzo(a)pyrene could not be detected in 51 (58.0%) baby food samples, it was determined in 37 (42.0%) samples ranging from 0.05 to 0.81 ?g/kg. The mean benzo(a)pyrene levels determined in infant formulae, follow-on formulae and infant and young children food samples were 0.14 ?g/kg, 0.24 ?g/kg and 0.39 ?g/kg, respectively. According to the obtained results, the levels of benzo(a)pyrene in analyzed samples did not exceeded the limit (1.0 ?g/kg) set in Turkish Food Codex. This result was considered to be positive for consumer health.