Yazarlar
- Baltaci, Cemalettin(26)
- Ürkek, Bayram(25)
- Ozturk, Samet(24)
- Şengül, Mustafa(20)
- Yuksel, Ferhat(19)
- Kaya, Hacer(15)
- Baltacı, Cemalettin(12)
- İlyasoğlu, Huri(12)
- Acet, Tuba(10)
- Aksakal, Vecihi(10)
- Adanacioglu, Hakan(9)
- Erdogdu, Ferruh(9)
- Liu, Shuxiang(9)
- Yolcu, Halil(9)
- Menevseoglu, Ahmed(8)
- Merddan, Kurtuluş(8)
- Akdoğan, Arda(7)
- Gündoğdu, Engin(7)
- Karabulut, Besim(7)
- Sirat, Abdulveli(7)
- Bahar, Bilge(6)
- Bayram, Bahri(6)
- Doğan, Nilgün(6)
- Güzel, Melih(6)
- Karaalp, Musa(6)
- Kaya, H.(6)
- Yüksel, Ferhat(6)
- Öz, Mehmet(6)
- Akar, Bülent(5)
- Burnaz, Nesibe Arslan(5)
- Coskun, Eda(5)
- Gül, Abdulkadir(5)
- Gürmeriç, Hüseyin Ender(5)
- Ilyasoglu, Huri(5)
- Kalkisim, Ozgun(5)
- Karaman, Safa(5)
- Karpuz, Ömer(5)
- Mazlum, Halit(5)
- Okcu, Zuhal(5)
- Ozdes, Duygu(5)
Yayınlar
- MakaleAçık Erişim2023The Effect of Organic Hawthorn (Crataegus tanacetifolia) Fruit Vinegar Supplement on Growth Performance, Carcass Characteristics and Some Serum Parameters in Broiler Chickens Subjected to Cyclic Heat Stress
Kaya, H.
Background: This study, it was aimed to determine the effects of adding organic hawthorn (Crataegus tanacetifolia) fruit vinegar (HFV) in different doses to the drinking water of broiler chickens reared under cyclic heat stress (CHS) on performance, carcass characteristics and some serum parameters. Methods: In the study, 300 one-day-old broiler chickens (Ross 308), after a 1-week acclimation period, were tested in two different (24 and 35◦C) ambient temperatures and three different HFV levels (0, 2 and 4 ml/L) according to the 2×3 factorial experimental design. Chicks were randomly distributed to 6 experimental groups with 5 replications, with 10 animals in each replication. The addition of organic HFV to the drinking water of broiler chickens subjected to CHS didn’t affect growth performance, carcass characteristics and visceral weight (P>0.05). Addition of HFV increased serum FFA level, decreased serum MDA, HDL and TAG levels (p<0.05) and did not affect other serum parameters (P>0.05) in CHS-treated groups. Result: As a result, it was concluded that the addition of HFV to the drinking water of broiler chickens exposed to cyclic heat stress did not have any negative effect on growth performance, carcass characteristics and visceral weights, but it could be beneficial in preventing lipid peroxidation.
- MakaleYalnız künye2023Increased heat tolerance and transcriptome analysis of Salmonella enterica Enteritidis PT 30 heat-shocked at 42 ℃
Qiu, Yan; Ozturk, Samet; Cui, Xinyao; Qin, Wen; Wu, Qingping; Liu, Shuxiang
In this study, we compared the heat tolerance parameter (D65℃) values of Salmonella enterica serovar Enteritidis PT 30 (S. Enteritidis ) heat adapted at different degrees (at 42 ℃ for 20–180 min) and cultivated using two methods. The treated group with the highest D65℃ value (LP-42 ℃-60 min) and the untreated groups (Control-TSB and Control-TSA) were subjected to transcriptome analysis. Heat-adaptation increased the D65℃ values of S. Enteritidis by 24.5–60.8%. The D65℃ values of the LP-42 ℃-60 min group (1.85 ± 0.13 min, 7.7% higher) was comparable to that of the Control-TSA. A total of 483 up- and 443 downregulated genes of S. enteritidis were identified in the LP-42 ℃-60 min group (log2fold change > 1, adjusted p-value < 0.05). Among these genes, 5 co-expressed and 15 differentially expressed genes in the LP-42 ℃-60 min and Control-TSA grops possibly contributed to the high D65℃ values of S. Enteritidis. The Rpo regulon was involved in the heat adaptation of S. Enteritidis, as evidenced by the significant upregulation of rpoS, rpoN, and rpoE. KEGG enrichment pathways, such as biosynthesis of secondary metabolites, tricarboxylic acid, and ribosomes were identified and mapped to reveal the molecular mechanisms of S. enteritidis during heat adaptation. This study quantified the enhanced heat tolerance of S. Enteritidis heat adapted at different degrees of heat-adaptation. The results of this study may serve as a basis for elucidating the molecular mechanisms underlying the enhanced heat tolerance at the transcriptome level.
- MakaleYalnız künye2023Microwave decontamination processing of tahini and process design considerations using a computational approach
Topcam, Huseyin; Coskun, Eda; Son, Ezgi; Kutuk, Dilay; Aytac, S. Aykut; Mert, Behic; Ozturk, Samet; Erdogdu, Ferruh
Tahini, as a low moisture food product, is linked to several outbreaks of Salmonella recently even though a high temperature roasting (of sesame seeds) through its production is involved. Therefore, a final decontamination approach might be required for safety. Considering its higher oil content and lower thermophysical properties, conventional approaches are not easy to apply while preserving the quality attributes. Therefore, microwave heating was used for decontamination purpose. For this purpose, a computational mathematical model was developed first to determine the temperature distribution of tahini during microwave heating, and microbial inactivation studies for Salmonella enteritidis (ATCC 13076) were carried out. Changes in color and peroxide values were evaluated, and the experimentally validated model was further used to design an industrial process to achieve a 5-log cycle reduction as an efficient decontamination processing. The target temperature over 80 °C within the sample was demonstrated to achieve such a process, and industrial scale process conditions were presented for 262 kg/h process capacity.
- MakaleYalnız künye2023Bioactive properties of vinegars produced from prunus laurocerasus L. varieties
Yilmaz, Kubra; Baltaci, Cemalettin; Ozturk, Seyda; Karpuz, Omer
BACKGROUND: Cherry laurel fruit (CLF) has distinctive bioactive properties, which may yield new food products based on CLF. OBJECTIVE: This research aimed to realize the production of vinegar from the CLF, thus, valorizing the CLF, which is rich in antioxidants and phenolic substances, and bringing a new nutrient-rich vinegar to the market. METHODS: Seven types of traditional CLF vinegar (CLFV) from three different species were produced, and their bioactive properties were examined. The bioactivity analyses of total phenolic substance (TPC), total flavonoid (TFC), total antioxidant activity (AA), DPPH (Free radical scavenging activity), FRAP (Ferric reducing antioxidant power), ABTS + (Radical cation scavenging effect) were conducted. In addition, the composition of phenolic substances was studied. RESULTS: This study showed that CLFV performed better than controls regarding antioxidant activity, phenolic compounds, and substances. The presence of intense phenolic elements in CLFV significantly impacts its antioxidant activity. The antioxidant activities of CLFV were detected to be greater than the previous reports on bioactivities of vinegar from various fruits. CONCLUSIONS: High antioxidant and phenolic content were observed in CLFV, similar to the composition of the CLF. The usability of CLFV as a healthy and nutritious food product seems achievable on an industrial scale.
- MakaleAçık Erişim2023Determination of Elemental Contents and Microbiological and Chemical Properties of Çökelek Cheeses Consumed in Turkey
Kalaycı, Nagihan; Ürkek, Bayram; Öztürk, Feyza; Şengül, Mustafa; Çiftçi, Esengül
The Çökelek samples what 30 different were collected from randomly local bazaars to investigate heavy metal contaminant and mineral levels and some physicochemical and microbiological properties of samples. While the Pb was identified in 6 of the 30 samples, the As was only found in 4 of the samples. The mean major and trace element contents of Çökelek samples were ordered as Na > P > Ca > K > Mg and Al > Zn > Ni > Cu, respectively. The physicochemical properties indicated a high deviation among samples. The mean total solids, ash, salt, fat, protein waters soluble nitrogen contents, and sample ripening index were 29.83%, 1.88%, 0.68%, 4.31%, 19.84%, 0.33%, and 1.79%, respectively. The mean total aerobic mesophilic bacteria (TAMB) count of Çökelek samples was found as 8.26 log CFU g−1. The coliform bacteria and yeast-mold counts were detected in 11 and 27 of 30 samples, respectively. The mean coliform and yeast-mold counts were 1.82 log CFU g−1 and 7.11 log CFU g−1, respectively. Traditional cheeses are not mentioned in legal laws such as the Turkish Food Codex. So, there is no legal limit and standard production processes. This situation is a problem in terms of traditional cheese quality. For this reason, traditional cheese should perform further studied, and determine the legal limits.
- MakaleYalnız künye2023Investigation of the effect of liquid phase of digested biomass on Phaseolus vulgaris L. var. ellipticus Mart under NaCl stress
Çiftçi, Fida; Acet, Tuba; Saribiyik, Oǧuz Yunus
The factors such as global warming, wild irrigation, and synthetic fertilisers pollute the soil and increase salinity. The salinity is defined as salt stress for plants, and plants have developed various tolerance mechanisms to survive under salt stress conditions. Therefore, efforts to increase the tolerance of salt sensitive plants such as beans (Phaseolus vulgaris) are considered important. Additionally, considering problems that appear depending on global warming, understanding the tolerance mechanisms, and activating them by using natural and sustainable solutions are important for plant growth and preventing lower agricultural productivity. In this study, the effect of biofertiliser obtained from a small-scale bioreactor on a plant exposed to salt stress on the development of morphological, physiological, and biochemical properties of the model plant, Phaseolus vulgaris L. var. ellipticus Mart (Pve) were investigated. The biofertiliser application increased the amount of chlorophyll, flavonoids, anthocyanin, and proline while the amount of hydrogen peroxide and lipid peroxidation decreased in the plant. This change enhanced the enzyme activities of catalase (CAT), superoxide dismutase (SOD), and ascorbate peroxidase (APX) and the plant formed tolerance to the salt stress. As a result, the biofertiliser application to the plant may activate the tolerance mechanism against salt stress.
- MakaleYayıncıda açık erişim2023Worldwide cotton production and trade during COVID-19 pandemic: An empirical analysis for a three-year observation
Erkencioglu, Bedriye N.; Zuhal, Mustafa; Tokel, Dilek; Ozyigit, Ibrahim I.
The COVID-19 pandemic has posed a significant impact on agriculture. Due to its importance in world trade and human life, the effects of the pandemic on the cotton economy were evaluated by using the data of important organizations such as the U.S. Department of Agriculture, the World Trade Organization, and International Cotton Advisory Committee in this study. With the Chow test, which measures of structural breaks, the effects of COVID-19 on cotton production and trade were examined. According to the Chow test results, the pandemic had no significant effect on cotton production, exports and imports in the People’s Republic of China and Türkiye, while being highly influential on cotton production and exports in the U.S. and Brazil. Distinctively, in Pakistan, it had a significant impact on cotton production and import. It was observed that although the demand, trade and prices for cotton were descended, the cotton prices started to recover with the increase in demand in the third quarter of 2020. In June 2022, the highest peak in cotton prices was observed. As a conclusion, it is shown that cotton production and trade during the pandemic were affected in all countries except People’s Republic of China and Türkiye. However, the marks of the effects of factors such as decreasing stocks, uncertainties in national economies, high inflation and increase in production costs on the cotton economy will be better understood in the coming years.
- Kitap BölümüYalnız künye2023Grains and Pulses in Diets of the Middle East and a Focus on Buckwheat
Yılmaz, Hacı Ömer; Meriç, Çağdaş Salih
Buckwheat (Fagopyrum esculentum Moench and Fagopyrum tataricum (L.) Gaertn.) is believed to have originated in central Asia. Chiefly cultivated in India, Nepal, China, North Korea, Russia, and Japan, it is a pseudocereal containing high protein, dietary fiber, vitamins and minerals, polyunsaturated fatty acids, and important antioxidants and phenolic compounds. In addition to its high protein bioavailability and economic value, it is an important alternative food with high nutritional value, suitable for the diet of celiac patients because it does not contain gluten. Buckwheat has gained worldwide importance because of the presence of some important bioactive constituents such as rutin, orientin, vitexin, quercetin, isovitexin, and isoorientin; other essential components like fagopyritols find vast potential for glycemic control in type 2 diabetics, positive cardiovascular effects, treatment of celiac disease, prevention of gallstones, and several hormone-dependent tumors. Currently, various products of buckwheat like flour, bread, biscuits, cookies, muffins, cakes, pasta, noodles, crackers, chips, and various fermented products and desserts are available in the market. Buckwheat has attracted worldwide attention, especially from food scientists, for its healing effects over chronic diseases. This chapter focuses on buckwheat in diets of the Middle East and its important effects on health.
- MakaleYalnız künye2023Determination of Yield, Yield Components, and some Quality Parameters of Bread Wheat (hexaploid) Cultivars with Different Origin in Arid Agricultural Conditions
Sirat, Abdulveli
There is need to breed wheat cultivars that are important in human nutrition with high seed yields and improved quality in terms of consumption. This study was conducted at Gumushane-Siran (Turkey) during the 2016–2017 and 2017–2018 cultivation seasons (winter) to identify bread wheat cultivars that show superior performance in terms of seed yield and quality characteristics. This research included 20 bread wheat cultivars using three replications based on the randomized complete block design. Heading date, plant height, spike length, number of seeds per spike, grain weight per spike, seed yield, and some quality characteristics (thousand seed weight, hectoliter weight, protein percentages, Zeleny sedimentation, and wet gluten percentage values) of cultivars were investigated. The maximum seed yield was obtained from Canik 2003 cultivar with 3749 kg ha−1, the lowest seed yield was noted as 3032 kg ha−1 in the Mufitbey cultivar. However, Canik 2003 cultivar came to the forefront in terms of spike length, number of seeds per spike, grain weight per spike, hectoliter weight, thousand seed weight, protein percentages, Zeleny sedimentation, and wet gluten percentage. In the cultivars included in the experiment, it was determined that there were positive and significant correlations between seed yield and number of seeds per spike, thousand seed weight, hectoliter weight, wet gluten percentage value, grain weight per spike, and protein percentages. The results showed that Canik 2003, Ekiz, Goksu-99, Karahan-99, and Selimiye come to the fore in terms of yield and yield elements and quality characteristics, and it seems appropriate to recommend.
- MakaleAçık Erişim2023Machine learning and domain adaptation to monitor yoghurt fermentation using ultrasonic measurements
Bowler, Alexander; Ozturk, Samet; di Bari, Vincenzo; Glover, Zachary J.; Watson, Nicholas J.
In manufacturing environments, real-time monitoring of yoghurt fermentation is required to maintain an optimal production schedule, ensure product quality, and prevent the growth of pathogenic bacteria. Ultrasonic sensors combined with machine learning models offer the potential for non-invasive process monitoring. However, methods are required to ensure the models are robust to changing ultrasonic measurement distributions as a result of changing process conditions. As it is unknown when these changes in distribution will occur, domain adaptation methods are needed that can be applied to newly acquired data in real-time. In this work, yoghurt fermentation processes are monitored using non-invasive ultrasonic sensors. Furthermore, a transmission based method is compared to an industrially-relevant non-transmission method which does not require the sound wave to travel through the fermenting yoghurt. Three machine learning algorithms were investigated including fully-connected neural networks, fully-connected neural networks with long short-term memory layers, and convolutional neural networks with long short-term memory layers. Three real-time domain adaptation strategies were also evaluated, namely; feature alignment, prediction alignment, and feature removal. The most accurate method (mean squared error of 0.008 to predict pH during fermentation) was non-transmission based and used convolutional neural networks with long short-term memory layers, and a combination of all three domain adaption methods.
- MakaleAçık Erişim2023Near-infrared spectroscopy and machine learning for classification of food powders during a continuous process
Ozturk, Samet; Bowler, Alexander; Rady, Ahmed; Watson, Nicholas J.
In food production environments, the wrong powder material is occasionally loaded onto a production line which impacts food safety, product quality, and production economics. The aim of this study was to assess the potential of using Near Infrared (NIR) spectroscopy combined with Machine Learning to classify food powders under motion conditions. Two NIR sensors with different wavelength ranges were compared and the ML models were tasked with classifying between 25 food powder materials. Eleven different spectra pre-processing methods, three feature selection methods, and five algorithms were investigated to find the optimal ML pipeline. It was found that pre-processing the spectra using autoencoders followed by using support vector machines with the all spectral wavelengths from both sensors was most accurate. The results were improved further using under-sampling and boosting. Overall, this method achieved 99.52, 97.12, 94.08, and 91.68% accuracy for the static, 0.017, 0.036 and 0.068 m s-1 sample speeds. The models were also validated using an independent test sets.
- MakaleAçık Erişim2023Relationship of progranulin response with some physio-biochemical parameters in Akkaraman sheep
Bayraktar, Buelent; Tekce, Emre; Genç, Murat; Kaya, Hacer; Özcan, Gulbahar Boyuk; Aydemir, Seyma; Kotan, Goksad Cemil; Takma, Cigdem; Ürüsan, Hilal; Aksakal, Vecihi
Progranulin (PGRN) is a multifunctional protein that is critical in the retention of embryos in the endometrium of the uterus and the protection of cervical tissue during fetal growth. In case of PGRN release and dysfunction, cervical tissue may remodel (regeneration) and lead to the risk of abortion. Serum PGRN level in sheep and its variation according to different physiological periods and its relationship with some biochemical parameters are unknown. In this study, the relationship between early lactation, early and late pregnancy serum PGRN levels and some biochemical parameters in Akkaraman sheep was investigated for the first time. In the literature search, no similar studies were found on the relationship between early lactation, early and late pregnancy serum PGRN levels and some biochemical parameters in Akkaraman sheep. The research was carried out on 90 Akkaraman sheep reared in the same herd under the same care and feeding conditions. In the study, Akkaraman ewe were divided into 3 groups as early lactation, early pregnancy and late pregnancy. 1st group is early lactation period ewe (first 60 days of lactation), (n = 30), 2nd group is in the first period of pregnancy (on the 0-90th day of the first pregnancy (n = 30)), 3rd group is in the late pregnancy of pregnancy (100-150 days of pregnancy (n = 30)) was created. Blood samples from vena jugularis were taken before morning feeding from the animals that formed the study groups. PGRN levels in serum were determined by ELISA method. In addition, glucose, calcium (Ca), magnesium (Mg), phosphorus (P), total cholesterol (TC), triglyceride (TG), low density lipoprotein (LDL), high density lipoprotein (HDL), very low density lipoprotein (VLDL) levels were analyzed in biochemistry autoanalyzer. As a result of the study, lactation and early pregnancy and late pregnancy mean serum PGRN levels were determined as 1.93, 1.78, 1.33 ng mL-1, respectively. The serum PGRN, glucose, Ca, Mg, P, TC, TG, LDL, HDL and VLDL levels of sheep with late pregnancy, early lactation and early pregnancy periods, which constitute the study groups, were found to be statistically significant (P<0.05). Our results have shown that due to the physiological role of PRGN in keeping the embryo in the endometrium of the uterine and in preserving the cervical tissue during fetal growth, there may be a useful parameter in the pursuit of the pregnancy process.
- MakaleYalnız künye2023Effect of oil exposure stages on the heat resistance of Salmonella enterica serovar Enteritidis phage type 30 in peanut flour
Liu, Shuxiang; Qiu, Yan; Ji, Kexin; Ozturk, Samet; Erdogdu, Ferruh; Qin, Wen; Yang, Ren; Wu, Qingping
The oil in low-moisture foods (LMFs) shows protective effects on bacteria during thermal processing. However, the circumstances under which this protective effect strengthens remain unclear. This study aimed to understand which step of the oil exposure to bacterial cells (inoculation, isothermal inactivation, or recovery and enumer-ation step) in LMFs can enhance their heat resistance. Peanut flour (PF) and defatted PF (DPF) were selected as the oil-rich and oil-free LMF models. Salmonella enterica Enteritidis Phage Type 30 (S. Enteritidis) was inoculated into four designated PF groups representing different oil exposure stages. It was isothermally treated to obtain heat resistance parameters. At a constant moisture content (aw,25 degrees C = 0.32 +/- 0.02) and controlled aw,85 degrees C (0.32 +/- 0.02), S. Enteritidis exhibited significantly high (p < 0.05) D values in oil-rich sample groups. For instance, the heat resistance values of S. Enteritidis in the PF-DPF and DPF-PF groups were D80 degrees C of 138.22 +/- 7.45 min and 101.89 +/- 7.82 min; however, the D80 degrees C in the DPF-DPF group was 34.54 +/- 2.07 min. The oil addition after the thermal treatment also helped injured bacterial recovery in the enumeration. For instance, the D80 degrees C, D85 degrees C, and D90 degrees C values in the DFF-DPF oil groups were 36.86 +/- 2.30, 20.65 +/- 1.23, and 7.91 +/- 0.52 min, respectively, which were higher than those in the DPF-DPF group at 34.54 +/- 2.07, 17.87 +/- 0.78, and 7.10 +/- 0.52 min. We confirmed that the oil protected S. Enteritidis in PF in all three stages: desiccation process, heat treatment, and recovery of bacterial cells in plates.
- MakaleAçık Erişim2022Effects of spray and freeze-drying methods on aroma compounds, sensory characteristics, physicochemical composition, antioxidant and antimicrobial properties of instant sage (Salvia rosifolia Sm.) tea
Baltaci, Cemalettin; Akşit, Zeynep; Şidim, Muhammed
Sage is used as an aroma and spice in foods around the world. With its strong and even bitter taste, sage has been traditionally used as an effective solution to many health problems for centuries. It is a rich plant with many bioactive compounds. In this study, instant tea production was performed from the dried samples of the sage plant (Salvia rosifolia Sm.) using two drying methods; freeze-drying and spray-drying. The sensorial, physicochemical, antioxidant and antimicrobial properties of the products obtained by both methods were analyzed. Color values, solubility in water, moisture analysis (21.3% spray-dried; 4.0% freeze-dried), free radical scavenging activity (DPPH), Trolox Equivalent Antioxidant Capacity (TEAC), Ferric reducing/antioxidant power assay (FRAP), aroma analysis, protein analysis (5.5% spray-dried; 5.7% freeze-dried), ash, mineral, antimicrobial and sensory analyses were performed. Significant differences were found between two soluble tea obtained by the spray-drying and the freeze-drying methods. In general, the antioxidant capacities are higher in freze-dried samples. All of the 61 aroma components were detected in freeze dried samples while only 18 of them were detected in spray dried samples. In addition to their differencies; plenty of bioactive components, easy to use, ready to drink herbal tea have been produced with both techniques.
- MakaleAçık Erişim2022Growth-Development, Yield and Quality Characteristics of Aronia Varieties Grown in Pots
Çelik, Hüseyin; Karabulut, Besim; Uray, Yahya
This study was carried out to determine the growth, development, yield and some quality characteristics of Nero and Viking Aronia varieties grown in open field and pot in Samsun ecological conditions. Three-year-old Aronia plants were planted in 80-liter pots containing a 1:1:1 (v/v) mixture (barnyard manure+soil+sand) and 5 plants were included in each replication. Number of shoots, flower buds and clusters, berry weight (g), yield (g/plant), firmness (N), number of fruits per cluster, must yield (ml/100g), TSSS (%) and pH values were measured in Aronia cultivars. In addition, monthly shoot growth rate (cm/month) was determined and phenological observations recorded. According to Viking and Nero Aronia varieties, the number of shoots (7.8 and 7.6 pieces), the number of flower buds (22.63 and 22.85 pieces), the number of clusters (45.06 and 44.80 pieces), the weight of berry (0.82 and 0.79 g), the fruit number in the bunch (21.45 and 21.53 pieces), berry firmness (4.90 and 5.35 N), amount of must (49.67 and 54.00 ml/100 g) and TSS (17.07 and 16.47) and pH values (3.65 and 3.52) were found to be close to each other. Bud burst (10 March), flowering (26 April), berry set (12 May) and harvest time (24 August) were also similar in cultivars. It was also revealed that while the shoot length was 97.47 cm and 95.47 cm on March 11, respectively, in Viking and Nero varieties, it reached 124.73 and 120.73 cm in August, five months later.
- MakaleAçık Erişim2022Gıda Tedarik Zincirinde Taşımacılık Maliyetlerinin Minimizasyonuna Yönelik Bir Vaka Çalışması
Kisa, Ayse Cansu Gok; Peker, İskender; Demirkan, Yasin
Etkin tedarik zinciri yönetimi için işletmelerin lojistik maliyetlerden tasarruf etmeleri son derece önemlidir. Yapılan çalışmalar, taşıma faaliyetlerinin ortalama bir ürünün maliyetine etkisinin %10-%20 olduğunu göstermektedir. Bu nedenle, taşımacılıkta yapılan herhangi bir iyileştirme, maliyetin azaltılmasına yardımcı olacak ve işletmenin kârına önemli katkı sağlayacaktır. Bu çalışmanın amacı, Karadeniz Bölgesinin lojistik üssü olan Samsun ilinde dış ticaret yapan bir gıda şirketinin dış kaynak sağlayıcısının, taşıma maliyetlerini minimize etmektir. Bu kapsamda bir Araç Rotalama Problemi (ARP) modeli geliştirilmiştir. Çözüm sürecinde, kapasite harici kısıt olmaması, verilerin eksiksiz olması ve herhangi bir varsayımda bulunulmamasından dolayı sezgisel Tasarruf Algoritması kullanılmıştır. Veriler ürünlerin taşınması sırasında şirketin oluşturduğu sevk irsaliyelerinden elde edilmiştir. Müşterilerden gelen taleplerin dağıtımı haftanın iki gününde yapılmaktadır. Önerilen çözüm algoritması ile gerek rota mesafesinde gerekse taşıma maliyetlerinde önemli tasarruf elde edilmiştir.
- MakaleAçık Erişim2022Gümüşhane yöresinde yetişen Ribes petraeum Wulfen (Frenk Üzümü) bitkisinden uçucu yağının elde edilmesi, kimyasal içerik ve biyolojik aktivitelerinin belirlenmesi
Üçüncü, Osman; Ilter, Seyda Merve; Fidan, Muhammed Said; Baltaci, Cemalettin; Öz, Mehmet
Bu makalede; R. petraeum bitkisinin yapraklarının uçucu yağı Clevenger tipi cihazda su buharı-distilasyonu metodu ile alınmıştır. Uçucu yağın kimyasal bileşimleri, GC-MS/FID cihazı ile analiz edilerek belirlenmiştir. Elde edilen uçucu yağın antioksidan aktivitelerinin belirlenmesi serbest radikal giderme (DPPH ve ABTS) aktivitesine ve demir (III) iyonu indirgeyici antioksidan gücü (FRAP) kapasitesi yöntemlerine göre yapılmıştır. Ayrıca bazı biyoaktif bileşen içerikleri toplam fenolik madde miktarları (TPC), toplam flavonoid madde miktarları (TFC), toplam antioksidan aktivite (TAC) çalışmalarıyla belirlenmiştir. Uçucu yağın antimikrobiyal aktiviteleri ise disk difüzyon yöntemi ile 23 farklı mikroorganizmaya karşı belirlenmiştir. Sonuç olarak; yüzde uçucu yağ verimi R. petraeum bitkisinin yapraklarında %0.47 olarak bulunmuştur. Bitki yapraklarının uçucu yağında % oran olarak en yüksek bileşik bulunan kimyasal sınıf aldehitler (%55.98) olarak tespit edilmiştir. Ayrıca, uçucu yağında bulunan ana bileşen (E)-2-hegzenal (%52.90) olarak saptanmıştır. Bitki kısımlarının toplanan örneklerine ait elde edilen antioksidan aktivite tayininde DPPH ve ABTS miktarları sırasıyla 18.73 mg AA/100 mL ve 21.31 mg AA/100 mL aralığında ve FRAP kapasitesi 6.50 mg FeSO4/100 mL tespit edilmiştir. Biyoaktif bileşen içeriklerinin TPC miktarı 66.37 mg GA/100 mL, TFC miktarı 1.51 mg QE/100 mL ve TAC miktarı 195.43 mg AA/100 mL olduğu bulunmuştur. Bitki kısmının toplanan örneklerine ait elde edilen antimikrobiyal aktiviteleri analizleri sonucuna göre mikroorganizmalara karşı herhangi bir antimikrobiyal aktivite göstermedikleri belirlenmiştir.
- MakaleAçık Erişim2022Gümüşhane (Kelkit) Koşullarında Bazı Aspir (Carthamus tinctorius L.) Çeşitlerinin Verim ve Kalite Özelliklerinin Belirlenmesi
Sirat, Abdulveli; Uçar, Dilek
Amaç: Bu çalışma, bazı aspir çeşitlerinin verim, verim unsurları ve bazı kalite özelliklerini araştırmak amacıyla 2021 (Mart- Ağustos) yılında Gümüşhane ilinin Kelkit ilçesinde yürütülmüştür. Materyal ve Yöntem: Tesadüf blokları deneme desenine göre 3 tekrarlamalı olarak yürütülen bu araştırmada 5 farklı aspir çeşidi; Balcı, Dinçer, Göktürk, Hasankendi ve Koç bitki materyali olarak kullanılmıştır. Araştırma Bulguları: Araştırmada; çıkış süresi, ilk çiçeklenme süresi, olgunlaşma gün sayısı, bitki boyu, ilk dal yüksekliği, dal sayısı, tabla sayısı, tabla çapı, tabla ağırlığı, tablada tane sayısı, tane verimi, bin tane ağırlığı, ham yağ oranı, ham yağ verimi ve ham protein oranı ele alınmıştır. Sonuç: Araştırma sonucuna göre en yüksek değerler; tane verimi Dinçer çeşidinden (128.06 kg da-1), bin tane ağırlığı Dinçer çeşidinden (44.13 g), ham yağ oranı Balcı çeşidinden (%30.92), ham protein oranı ise yine Dinçer çeşidinden (%15.43) elde edilmiştir. Aspir çeşitlerinin tane verimi ile incelenen karakterler arasındaki korelasyon katsayıları bakımından; bitki boyu (r=0.640**), tabla sayısı (r=0.759**), ham yağ verimi (r=0.875**), ilk dal yüksekliği (r=0.517*), tabla ağırlığı (0.533*), tablada tane sayısı (r=0.520*), bin tane ağırlığı (r=0.582*) ve ham protein oranı (r=0.525*) arasında önemli ve pozitif bir ilişki görülürken; tane verimiyle çıkış gün sayısı (r= -0.298) ve dal sayısı (r= -0.231) ile negatif fakat önemsiz bir ilişki olduğu saptanmıştır.
- MakaleAçık Erişim2022Determination of physical, chemical and antioxidant properties of pomegranate sauces sold in Turkish markets
Baltaci, Cemalettin; Akar, Bülent; Kamış, Yunus Emre
This study aimed to determine the physical, chemical and antioxidant properties of pomegranate sauces sold in the Turkish markets. A total of eighteen pomegranate sauces, seventeen of which were purchased from the market, and one produced in a rotary evaporator, were analyzed with respect to antioxidant activity, titratable acidity, brix, hydroxymethylfurfural (HMF), pH, color, and sugar. The antioxidant activities of the samples were analyzed by six different methods, including DPPH (2,2-diphenyl-1-picrylhydrazil) radical scavenging activity, ferric reducing antioxidant power (FRAP), ABTS●+ radical scavenging capacity, total antioxidant capacity assay (TAC), total phenolic content (TPC), and total flavonoid content (TFC) methods. The highest and lowest antioxidant activity values were as follows, respectively: 5.23 and 822.69 mg AA/kg for the DPPH method, 57.94 and 2380.94 mg FeSO4/kg for the FRAP method, 660.47 and 3690.83 mg AA/kg for the TAC method, 23.06 and 11680.71 mg QEE/kg for the TFC method, and 123.54 and 9566.95 mg GAE/kg for the TPC method. In addition, HMF contents of the most samples were below the permissible limit value (50 mg/kg), while some of them showed a heterogeneous distribution between 4.58 and 103.68 mg/kg. Such a heterogeneous distribution of the HMF contents may be due to the factors such as raw materials and additives used in production, applied heat treatments, production processes, and storage conditions. As a result, HMF content in pomegranate sauce can be reduced below the permissible limit if the production conditions comply with the standards.
- MakaleAçık Erişim2022ISO 22000 Gıda güvenliği yönetim sisteminin çay fabrikalarındaki uygulanabilirliği
Üçüncü, Osman; Dilek, Cemal
Günümüz çay tüketicilerinin bilinçli ve seçici olmasından dolayı çay fabrikaları, yaş çay alımından paketlemeye kadar geçen süreçte belirli standartlar dahilinde kalite, hijyen ve gıda güvenliğini daha da ön plana çıkarmaktadırlar. Bu süreçte çay fabrikalarının kalite ve hijyen sorumlularına önemli görevler düşmektedir. Bu çalışmada ISO 22000 Gıda Güvenliği Yönetim Sistemine sahip Trabzon, Giresun ve Rize’de bulunan çay fabrikalarına yönelik, ISO standartlarının uygulanabilirliği analiz edilmiştir. Nitel araştırma desenine sahip bu çalışmada, ISO 22000 Gıda Güvenliği Yönetim Sistemi belgesi olan üç fabrikanın kalite ve hijyen sorumluları ile yarı-yapılandırılmış mülakatlar gerçekleştirilmiştir. Elde edilen veriler içerik analizi yöntemi kullanılarak analiz edilmiştir. Sonuç olarak, işletmelerin gıda güvenliği konusunda bazı problemlerinin olduğu, bu problemlerin çözümü için işletme sahiplerinin öncelikle ISO 22000’in yararlı olduğunun bilincinde olması gerektiği belirlenmiştir. Ayrıca katılım sağlayan işletmelerin ISO 22000 standartlarının uygulama aşamalarında karşılaştığı bazı sorunlar ortaya çıkarılmış ve sistem için gereken kaynakların sağlanması ve eğitim, personel, üretim alanı, depoların yönetimi için ihtiyaç duyulan yapı kurulması ile ISO 22000 sistemlerinin çay fabrikalarında uygulanabilir ve faydalı olduğu sonucuna varılmıştır.
