Sürdürülebilir Kalkınma Amaçları
Yayınlar
- MakaleYalnız künye2021Determination of Quality of Raw Milk Collected from Atatürk University Agriculture Faculty Pilot Dairy Plant
Gürbüz, Zeynep; Şengül, Mustafa; Ürkek, Bayram; Erkaya, Tuba; Akgül, Halil İbrahim
In this study, the quality of produced products have a great importance. For this purpose, raw milk samples is obtained from Atatürk University Dairy Plant for every four seasons separately (summer, autumn, winter, spring) to protect human health and produce quality products. Physical and chemical properties (dry matter, fat, ash, protein, specific gravity, acidity and pH) of raw milk samples and microbiological (somatic cell count, total aerobic mesophilic bacteria (TAMB), mould, yeast, coliform bacteria and Staphylococcus aureus (S. aureus)) properties were investigated. Dry matter, ash (P<0.05) and fat (P<0.01) values of raw milk samples were affected significantly by dairy farm, meanwhile protein, specific gravity, pH and acidity values were not affected (P>0.05). Seasons had a significant effect on dry matter, protein, fat (P<0.05), ash and pH (P<0.01) values of raw milk samples. But, seasons did not have a significant effect on only specific gravity and acidity values (P>0.05). TAMB, yeast, mould counts indicated significantly changes based on dairy farms and seasons. On the other hand, coliform bacteria was not affected (P>0.05) by dairy farms and seasons. S. aureus counts were affected statistically by only seasons (P<0.01).
AtıfTR Dizin1
İncele - MakaleAçık Erişim2017Scopus SJRQ2Prevalence and comparing of some microbiological properties, somatic cell count and antibiotic residue of organic and conventional raw milk produced in Turkey
Ürkek, Bayram; Şengül, Mustafa; Erkaya, Tuba; Aksakal, Vecihi
The aim of this study was to investigate the effects of production systems and milk collection periods on the somatic cell count (SCC), some microbiological properties, total aerobic mesophilic bacteria (TAMB), coliform, Staphylococcus aureus (S. aureus), yeast and mould) and antibiotic residue of milk; in Turkey. Milk samples were collected from 9 conventional farms and 9 organic farms during one year time, at six different months (December 2013 to October 2014), and all farms were selected from the same geographical locations. All organically managed farms had organic production certificates given by the Republic of Turkey Ministry of Food, Agriculture and Livestock. The count of TAMB, coliform, and coagulase positive S. aureus were affected by production systems at the level of p<0.01; yeast and mold, and somatic cell count (SCC) were affected at the level of p<0.05. But, differences according to months were statistically significant only on TAMB (p<0.01) and coliform (p<0.05) counts. The general means of TAMB, coliform and yeast and mould counts of the organic milk (OM) were significantly lower (p<0.05), while the general means of SCC and coagulase positive S. aureus count of the OM was significantly higher (p<0.05) compared to conventional milk (CM). Antibiotic residue was determined in one of the CM sample and in two of the OM samples. Our study is the first research that compared conventional and organic milk in Turkey. This study indicated that the microbiological quality of OM was the higher in terms of TAMB, coliform and yeast and mould, whereas was the lower in relation to SCC and coagulase positive S. aureus counts. But, the quality of both milk types should be improved.
AtıfScopus10WoS8OpenAlex12
İncele - MakaleAçık Erişim2011Scopus SJRQ1Effect of photosonication treatment on inactivation of total and coliform bacteria in milk
Şengül, Mustafa; Erkaya, Tuba; Başlar, Mehmet; Ertugay, M. Fatih
The combined effect of simultaneously applied acoustic energy and ultraviolet irradiation (UV-C), named photosonication, on the population reduction of total and coliform bacteria in raw milk was investigated. Photosonication was carried out at 100% (120 μm; 240 W) amplitude of ultrasound accompanied by UV light of 13.2 W cm-2 while sonication was carried out at 100% amplitude without UV light. An ultrasonic processor (400 W and 24 kHz with a 22 mm diameter probe) and 3 ultraviolet lamps (4400 μW cm-2 per lamp) were used. The exposure time was 15 min for all treatment, and samples were taken after 0, 3, 6, 9, 12 and 15 min. Thermal treatment (at 65 °C for 30 min) achieved a 3.29 log and 5.31 log-reduction for total and coliform bacteria, respectively. However, the reduction achieved was 4.79 log cfu mL-1 and 5.31 log cfu mL-1 for total and coliform bacteria, respectively, in photosonication while 1.31 log cfu mL-1 and 4.01 log cfu mL-1 for total and coliform bacteria, respectively in sonication. During photosonication, UV light contributed to an increase of lethality.
AtıfScopus33WoS32OpenAlex39İncele