Authors:Ramazan YAZICI; Ömer SAYLAR Abstract: The aim of this study is to determine the length-weight relationship, length-length relationship, and Fulton’s condition factor (K) of Capoeta tinca, which is endemic to Turkey. A total of 52 samples were obtained from Bayat Pond in 2017. The total length (TL) of the samples ranged between 20 and 34 cm. Total weights (W) of they also varied from 85 to 446g. Strong correlations were found between length and weight. In the length-weight relationship equation, a and b was found as 0.0144 and 2.9028, respectively. b value was not statistically different from 3 (t-test, P>0.05). Therefore, this species showed isometric growth in the Bayat Pond. The value of Fulton’s condition factor was 1.0485. Total length - Fork length (FL), Total Length - Standard length (SL) and Fork length - Standard length conversion equations were calculated. There was a high correlation between all length types. In this study, the length-weight relationship, length-length relationship, and Fulton's condition factor values of Capoeta tinca inhabiting Bayat Pond were determined for the first time. PubDate: Fri, 30 Sep 2022 00:00:00 +030
Authors:Ümit ERDOĞAN Abstract: In present study, the oxidation protection efficiency of TQ on two different types of oils was evaluated. In addition, antioxidant capacity and hydroxyl radical scavenging (HRS) activity of the TQ were investigated according to the CUPric reducing antioxidant capacity (CUPRAC) and ferric reducing antioxidant potential (FRAP) methods. The FRAP and CUPRAC methods revealed that antioxidant and hydroxyl radical scavenging activity of thymocionone was remarkably effective. It was determined that TQ had a high HRS potential (80.36 ± 0.92 %) even at very low concentrations (1.6 µg/mL). Research findings revealed that, compared with synthetic antioxidant (BHT), TQ was more effective in retarding the oxidation of the two types of oil. The oils with TQ incorporated exhibited much better chemical stability and lower peroxide value. As an alternative to synthetic antioxidants, TQ could be recommended as an effective natural antioxidant to improve the stabilization of edible vegetable oils. PubDate: Fri, 30 Sep 2022 00:00:00 +030
Authors:Seval Seval KIRDAR; Şenol KÖSE Abstract: Çanak cheese which is matured in earthen were containers, is a common cheese type produced widely in Yozgat province of Turkey. Thirty Çanak cheese samples were investigated for routine chemical composition, lipolysis, proteolysis, and free fatty acids (FFAs). Dry matter, salt, salt in dry matter, fat, fat in dry matter, and acidity values in the analyzed samples were determined to be between 45.01 and 66.27 %; 2.11 and 8.89 %; 3.70 and 19.76 %; 13.00 and 40.00 %; 26.23 and 69.30 % and, 0.05 and 0.25%, respectively. WSN, TCA-SN, PTA-SN and lipolysis values were detected to be high in Çanak cheeses. Also, C14, C16, and C18:1 fatty acids were found to be higher than other fatty acids in all cheese samples. PubDate: Fri, 30 Sep 2022 00:00:00 +030
Authors:Tuba TEKİN; Mehmet ÇAVDAR, Emine DİNÇER Abstract: The Adductor Pollicis Muscle Thickness (APMT) value is the numerical value obtained by measuring the thickness that contains components such as tissue, skin, nerve and adipose tissue by means of a caliper. A new anthropometric measurement technique, APMT, is promising for clinical use in conditions such as obesity and malnutrition. In this study, it is aimed to compare APMT measurement with other anthropometric measurements in overweight-obese and normal weight female individuals. Healthy female individuals living in Sivas, between the ages of 18-25, overweight-obese and with normal weight were included in the study. APMT measurements were taken from both the right and left hands of the participants. The measurements were repeated twice and the average of the measurements was taken. The study sample was divided into normal weight and overweight-obese groups. A total of 46 individuals were included in the study by including 23 women in the groups. While obese individuals constitute 15.2% of the sample; overweight individuals constitute 34.8%. While APMT-R was 15.37±1.90, APMT-L was 15.04±1.78 mm in individuals with normal weight; APMT-R was 17.10±2.81 and APMT-L was 16.69±22.75 mm in overweight and obese individuals. APMT and APMT index values measured on both the right and left hands were found to be higher in overweight-obese individuals than in individuals with normal weight (p PubDate: Fri, 30 Sep 2022 00:00:00 +030
Authors:Emine Nur AKTAŞ; Sait Dündar SOFUOĞLU Abstract: In this paper, the optimization of computer numerical control (CNC) drilling parameters was conducted using the Taguchi design method on the drilling holes’ inner surfaces roughness (Ra) massive wooden edge-glued panels (EGP) made of spruce (Picea Orientalis Link.), beech (Fagus Orientalis Lipsky), Iroko (Chlorophora excelsa) and Medium Density Fiberboard surfaced with synthetic resin sheet (MDFlam). Three drilling parameters and their effects on Ra were evaluated. These parameters included spindle speed, feed rate, and cutter type. Surface roughness measurements according to ISO 4287 were performed on the inner surfaces of the holes, and Ra values were obtained. An analysis of variance (ANOVA) was performed to identify the significant factors affecting the Ra. Optimum drilling parameter combinations were acquired by analyzing the signal-to-noise (S/N) ratio. It is shown that the most ideal result was obtained with a two flutes cutter (cutter number 2) at 18000 rpm and feed of 1750 mm/minute for in-hole roughness values of the MDFlam test sample. In the drilling operations performed with a double-entry cutter, the lowest roughness values were obtained in all materials. PubDate: Fri, 30 Sep 2022 00:00:00 +030
Authors:İrmak KARADUMAN ER; Fatma SARF, Emin YAKAR Abstract: Mg doped ZnO films were coated multi-walled carbon nanotubes (MWCNTs) via fast chemical bath onto ZnO seed layers. XRD analysis showed preferential orientation shift from high-energy (002) peak to low-energy (101) peak with MWCNTs coating. Average crystalline size of Mg doped ZnO samples are 15 nm. diameter and 50% percent reduction has been observed with MWCNTs coating. SEM images reveals the presence of high accumulative nanoflower forms on Mg:ZnO surfaces and homogenous net-shaped coating has been achieved by MWCNTs inclusion so active surface area may increase. No major difference of optical absorption edge is detected in both films however MWCNTs coating cause an increase direct band gap. Due to Burstein-Moss effect, Mg:ZnO and Mg:ZnO/MWCNTs films with using Tauc plot calculated band gap values are 3.04 eV and 3.34 eV, respectively. From FTIR spectra, no obvious change is not detected the functional groups of the samples. Electrical studies show that MWCNTs decrease the resistance and the resistance of films at room temperature were calculated 29.85 and 8.53 k for Mg:ZnO and Mg:ZnO/MWCNTs films , respectively. PubDate: Fri, 30 Sep 2022 00:00:00 +030
Authors:Şerife ÇEVİK; Gülcan ÖZKAN, Erkan KARACABEY Abstract: In this study, oleomargarine production was performed by using carnauba wax for the mixture of refined hazelnut oils enriched with virgin olive oil. The response surface methodology was used for the evaluation of the studied responses depending on the production parameters and for their optimization. Hardness and stickiness value (g force), oil binding capacity (%) and crystal formation time (min.) of the oleomargarines were determined. The oleomargarine process was optimized by using the response surface methodology, where the stickness and crystal formation time (CFT) were minimized and the oil binding capacity (OBC) (%) was maximized. By the way the optimum production formulation was determined. Acidity, peroxide values, fatty acid composition and DSC melting profiles were analyzed besides of hardness and stickiness value (g, force), oil binding capacity (OBC, %), crystal formation time (CFT, min). Meanwhile, in oleomargarines, the total phenolic compound and total sterol amounts were spectrophotometrically measured and tocopherol compositions were determined by HPLC. The ratio of oleogelator was found to be significant, since it causes some changes in the hardness and stickiness, CFT (min), and OBC (%) values of oleomargarines as well as physical properties including color values, melting and crystallization temperatures. Oleomargarine samples had higher values of melting and crystallization than the breakfast margarines, which were used as reference food materials. The fatty acid composition (%) of oils and oloemargarines were rich in terms of mono and polyunsaturated fatty acids, whereas saturated ones were at low. When the margarine and oleomargarine samples were compared, the saturated fatty acid content of the oleomargarine samples were found to be significantly lower than the margarine samples. Enrichment with virgin olive oil differed the fatty acid composition, total phenolic content, β- sitosterol and tocopherol composition of oleomargarines depending on its addition ratio in mixture. PubDate: Fri, 30 Sep 2022 00:00:00 +030
Authors:Meral APAYDIN YAĞCI; Mehmet Zeki YILDIRIM Abstract: In this study, the impacts of zebra mussels on aquatic communities (biology, ecology, natural enemies of zebra mussel, effects on the ecosystems etc.) were evaluated based on the international scientific literature. In the last 30 years, zebra mussel studies have been focused on their distribution, environmental interactions and harms in different aquatic ecosystems. With this review study, a synthesis was made from studies on zebra mussels that cause damage to many aquatic ecosystems around the world, and the hypothesis for their reduction in the ecosystem was put forward. As a result of this hypothesis, suggestions such as joining the pieces of a puzzle are presented in the last part of the review. With the implementation of the suggestions given as a result of the study, it will be possible to make a great contribution to the economies of the countries by reducing the zebra mussel, which causes a billion dollars of economic damage in aquatic ecosystems. In this context, freshwater lake, which is the most intense in America and freshwater lake in similar ecosystem which is rarely seen in Anatolia in Eurasia, should be studied simultaneously. As a result, by preventing the reproduction of the species causing problems in many aquatic ecosystems in the world, a great distance will be covered in terms of protecting water resources for the coming years. PubDate: Fri, 30 Sep 2022 00:00:00 +030
Authors:Ayşe AMUCAOĞLU; Betül TÜLEK, İbrahim AYTAŞ Abstract: With the increasing interest in outdoor recreation activities, the demand for national parks and natural parks also increases. Natural parks are natural parts with vegetation and wildlife features, suitable for public recreation and entertainment in the integrity of the landscape. Unlike National Parks, they are natural parts that have protection, recreation and tourism areas with only natural resource values that are rare nationally and internationally. Today, natural park areas are visited by many people who come for recreation activities. For this reason, recreational activities in natural parks gain importance and take an important place in tourism activities. Kadınçayırı Natural Park, which is the research area, is located between Çankırı and Kastamonu provinces. It has aimed to reveal the recreational potential by evaluating user trends and expert preferences with the surveys conducted in the field. Analytical Hierarchy Process (AHP) analysis has been applied to the obtained data arranged in line with Gülez Method features and it has been determined that the recreational service and potential of the Kadınçayırı Natural Park showed enrichment and there are some criteria that affect the recreational activities in the area and in this context, suggestions have been developed in terms of the Landscape Architecture professional discipline. PubDate: Fri, 30 Sep 2022 00:00:00 +030
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