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Ardahan, Turkey

Oguzhan Yildiz P.,Ardahan University
Journal of Food Processing and Preservation | Year: 2015

This study investigated the effect of essential oils (EOs) (thyme and rosemary) and packaging (vacuum and modified atmosphere - 50% CO2/+50% N2) on hot smoking rainbow trout during storage (4C) for 90 days. Fillets were conducted to microbiological (i.e., total aerobic mesophilic bacteria, psychrotrophic bacteria, lactic acid bacteria, Clostridium perfringens, C.botulinum, yeast and mold) and chemical (i.e., pH, thiobarbituric acid reactive substances, total volatile base nitrogen) analyses and sensory quality on 0, 10, 20, 30, 40, 50, 60, 70, 80 and 90 days. In conclusion, EO treatment to smoking showed positive effect on shelf life, especially thyme oil showed more positive effect when compared with rosemary oil. © 2015 Wiley Periodicals, Inc. Source

Kukrer S.,Ardahan University | Buyukisik H.B.,Ege University
Turkish Journal of Botany | Year: 2013

İzmir Bay has been one of most polluted bays of the Mediterranean for a long time. When the "Big Channel Project" was completed in 2000, sewage flow into the bay ended. Hence, the influence of creeks, which are the only source of water transportation to the inner bay, was investigated in the current study. Monthly samples of creek water and seawater were taken. Basic water quality variables and nutrients were measured. In addition, the phytoplankton community was arrayed into size fractions to assess the contribution of each size fraction to biomass and pigment concentrations. Analyses showed that the creek waters had very high nutrient concentrations. Although decreasing nutrient concentrations of the sea as compared to past years were detected, results of the analyses showed that the phytoplankton biomass was increased. Minimum and maximum values of nutrient concentrations and chlorophyll-a were 0.23-22.28 μM for ammonium, 1.54-11.77 μM for nitrate, 0.00-3.51 μM for nitrite, 1.99-41.94 μM for silicate, 0.00-5.96 μM for phosphate, and 5.03-30.26 μg/L for chlorophyll-a. Nanoplankton was the dominant phytoplankton group in the inner bay. An increment in picoplankton was detected towards the outer part of the bay. The microplankton biomass was correlated with NH+ 4-N, [Si(OH)4-Si], and o.PO4-P. [Si(OH)4-Si], o.PO4-P, and microplankton were the most important constituents in the inner bay. Consequently, controlling nutrient concentrations in the creeks might contribute to the cleaning process in İzmir Bay. © TÜBITAK. Source

Ouzhan Yildiz P.,Ardahan University
Packaging Technology and Science | Year: 2015

In this study, the effect of essential oils (thyme and clove) and packaging treatments (vacuum and modified atmosphere) on the storage of hot smoked rainbow trout (Oncorhynchus mykiss) fillets over a period of 120 days at 4°C was investigated. Fillets were subjected to microbiological (total aerobic mesophilic bacteria, psychrotrophic bacteria, lactic acid bacteria, yeast and mould), chemical analyses (pH, thiobarbituric acid reactive substances and total volatile base nitrogen) and quality testing throughout the storage period. Difference in microbiological and chemical changes between samples was found to be significant (p < 0.05) during storage period. Sensory evaluation showed significant differences between the samples, and V2 and M2 samples were assessed as the most acceptable products by the panellists. In conclusion, essential oils treatment to hot smoking had a positive effect on shelf life of rainbow trout, especially clove oil showed more positive effect when compared with thyme oil. © 2015 John Wiley & Sons, Ltd. Source

Results obtained from beachrock lying on the north coast of the antique city of Parion in Çanakkale province, NW Turkey, are presented based on field data, petrographic analyses, cement fabrics, and radiocarbon dating. Extending to 20 m offshore at a depth of -2 m, the studied 50-cm thick beachrock is poorly sorted lithic sandstone. Both exposed and submerged parts are characterized by sequentially precipitated marine phreatic and vadose cements composed of micrite encrustations with micro-organism borings, pseudopeloidal aggregates of high-Mg calcites with scalenohedral habits and meniscus bridges. Radiocarbon ages point to a deposition during the classical period when the sea level was below (between -1 and -1.5 m) that of the present. The beachrock witnesses a granule- and pebble-dominated wide beach prior to cementation, suggesting that Parions fortification walls were behind the coastline during this lowstand and raises questions concerning the existence of a harbor north of the city. © 2013 Taylor & Francis. Source

Baygin M.,Ardahan University | Karakose M.,Firat University
The Scientific World Journal | Year: 2013

Nowadays, the increasing use of group elevator control systems owing to increasing building heights makes the development of high-performance algorithms necessary in terms of time and energy saving. Although there are many studies in the literature about this topic, they are still not effective enough because they are not able to evaluate all features of system. In this paper, a new approach of immune system-based optimal estimate is studied for dynamic control of group elevator systems. The method is mainly based on estimation of optimal way by optimizing all calls with genetic, immune system and DNA computing algorithms, and it is evaluated with a fuzzy system. The system has a dynamic feature in terms of the situation of calls and the option of the most appropriate algorithm, and it also adaptively works in terms of parameters such as the number of floors and cabins. This new approach which provides both time and energy saving was carried out in real time. The experimental results comparatively demonstrate the effects of method. With dynamic and adaptive control approach in this study carried out, a significant progress on group elevator control systems has been achieved in terms of time and energy efficiency according to traditional methods. © 2013 Mehmet Baygin and Mehmet Karakose. Source

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