خيارات البحث
النتائج 1361 - 1370 من 5,301
The Change in Some Leaf Micromorphological Characters of Prunus laurocerasus L. Species by Their Habitat النص الكامل
2018
Nurcan Yiğit | Mehmet Çetin | Hakan Şevik
In this study, it was aimed to identify the change in some micromorphological characters in Prunus laurocerasus L. leaves obtained from 6 different provinces located in the areas where different climate types are dominant, depending on their habitat. In this regard, the leaf samples were collected from Prunus laurocerasus L. individuals in the provinces of Rize, Samsun located in the areas including the European-Siberian, Irano-Turanian and Mediterranean phytogeographical regions. The leaf epidermis images were obtained with the help of SEM on the collected leaf samples, and the required measurement procedures were performed on these images with the help of “Image J” measurement program. By measurements performed on the leaf epidermis surface, Stoma Length (µm), Stoma Width (µm), Pore length (µm), Pore width (µm) and Stoma Density (in an area of 1 mm2) measured such as micromorphological characters. The data obtained were subjected to the Variance analysis and Duncan’s test, and the change in these characters depending on their habitat was statistically evaluated. At the end of the study, it was determined that there were statistically significant differences at the confidence level of minimum 95% among the conditions of the habitat in terms of all characters except for the stomatal width.
اظهر المزيد [+] اقل [-]Erzurum Daphan Sulama Birliği Birinci ve ikinci Etap Sulama Şebekesinin Performansının Değerlendirilmesi (2012-2016) النص الكامل
2018
Fatih Mehmet Kızıloğlu | Üstün Şahin | Serap Diler | Semih Öztaşkın
Bu çalışma, Devlet Su İşleri Müdürlüğü tarafından inşası tamamlanarak sulamaya açılan ve Daphan Sulama Derneği'ne devredilen Daphan Ovası birinci ve ikinci etap sulama projeleri alanlarının 2012-2016 yılları arasında sulama sistemi performansının değerlendirilmesi amacıyla yürütülmüştür. Araştırma sonucunda yıllık net su temin oranının sulu koşullarda bitkisel üretim yapılan alan için 7,10 ile 9,90 arasında olduğu, sulamaya açılmış toplam alanda da yıllık olarak 2,19 ile 2,60 arasında değiştiği belirlenmiştir. Sulamaya açılmış toplam alan için su temin oranları 0,93 ile 1,10 arasında olup sulu koşullarda üretim yapılan alanda 3,20 ile 4,20 aralığında değişmiştir. Sürdürülebilir sulama alanı oranı %24,53 ile %33,15 arasında gerçekleşmiş, üretim değeri oranı da %19,34 ile %26,13 arasında belirlenmiştir. Karlılık oranı 4,30 ile 9,28 arasında iken mali etkinlik oranı %17,69 ile %46,82 arasında, mali yeterlilik oranı %106 ile %145 arasında gerçekleşirken tahsilât oranı %20,66 ile %34,37 arasında kalmıştır.
اظهر المزيد [+] اقل [-]Mersin Körfezinde Avlanan Mavi Yengecin (Callinectes sapidus Rathbun, 1896) Mikrobiyolojik Kalitesinin Araştırılması النص الكامل
2018
Gülderen Kurt Kaya | Halil Yalçın
Bu çalışmada, Mersin körfezinde avlanan mavi yengecin (Callinectes sapidus Rathbun, 1896) mikrobiyolojik kalite bakımdan incelenmesi amaçlanmıştır. Örnekler, Mersin Merkez (1. İstasyon), Erdemli (2. İstasyon) ve Silifke (3. İstasyon) ilçelerinde avlanan balıkçılardan temin edilmiş ve Mersin Gıda Kontrol Laboratuvar Müdürlüğü’nde analize alınmıştır. Çalışmada 180 adet örnek kullanılmış olup, analizler Ocak - Aralık 2014 tarihleri arasında aylık periyotlar şeklinde yapılmıştır. Araştırmada Salmonella spp., Koagulaz pozitif Staphylococcus aureus, Escherichia coli, Listeria monocytogenes, Vibrio choleraee, Vibrio parahaemolyticus, ve koliform grubu bakteriler araştırılmıştır. Çalışmada elde edilen sonuçlar göre; Salmonella spp., Listeria monocytogenes, Vibrio parahaemolyticus ve Vibrio cholerae her üç istasyonda da yıl boyunca tespit edilmemiştir. Koagulaz pozitif Staphylococcus aureus, Escherichia coli ve koliform grubu bakteriler ise üç çalışma istasyonunda tespit edilmiş ve sıcaklığa bağlı olarak artış gösterdikleri saptanmıştır. Sonuç olarak; çevresel kökenli faktörlerin taze yakalanmış yengeçlerin bakteriyel florası üzerinde etkisinin olduğu sonucuna varılmıştır.
اظهر المزيد [+] اقل [-]Salt Distribution and Salt Uptake during Ripening in Turkish White Cheese Affected by High Pressure Processing النص الكامل
2018
Nurcan Koca | Raghu Ramaswamy | W.M. Balasubramaniam | W. James Harper
Turkish white cheeses after brine salting were subjected to high pressure processing (HPP) at 50, 100, 200 and 400 MPa for 5 and 15 min and the samples pressurized for 15 min were ripened in brine for 60 days. The effects of HPP on the salt distribution in external, middle and internal zones of cheese after pressurization and on the salt uptake of whole cheese block during ripening were investigated. HPP did not change the values of moisture, salt and salt in moisture in different zones of cheese. Furthermore, pressure holding time had no effect on salt distribution in cheese. The salt contents of un-pressurized and pressurized cheese samples were equilibrated on the 14th day of ripening, and then stabilized, with no high pressure effect. As a result, HPP at pressures up to 400 MPa did not significantly affect neither salt distribution after high pressure processing nor salt uptake during ripening. However, a slight increase in moisture at the pressures of 200-400 MPa on the 60th day of ripening, which was not significant, might warn further increases in moisture of white cheese for longer ripening periods than 60 days. Higher pressure applications may alter all those values in white cheese because of textural changes.
اظهر المزيد [+] اقل [-]Ege Bölgesi Zeytinyağlarının Fenolik Bileşenleri النص الكامل
2018
Hasan Hüseyin Kara | Mustafa Kıralan | Eda Çalıkoğlu | Ali Bayrak
Bu çalışmada, Türkiye’de başlıca zeytin yetiştiriciliği yapan Ege bölgesinin bazı illerinden (Muğla, Aydın, İzmir ve Manisa) 2 hasat dönemi (2007-2008 ve 2008-2009) süresince yerli zeytin çeşitlerinin (Gemlik, Memecik, Ayvalık, Uslu ve Domat) yağı incelenmiştir. Bu yağların toplam fenolik madde ve fenolik bileşimi belirlenmiştir. Yağların toplam fenolik madde içeriği, 2007-2008 hasat dönemi örneklerinde 23,69-153,64 mg kafeik asit/kg, 2008-2009 hasat dönemi örneklerinde 16,18-136,22 mg kafeik asit/kg aralığında belirlenmiştir. Tüm zeytinyağı örneklerinde tespit edilen fenolik maddeler; tirozol, oleuropein, 4-hidroksifenil asetik asit, luteolin, vanilik asit, hidroksitirozol, rutin, sinnamik asit, verbaskozit, hidroksi fenilkarboksilik asit, sirinjik asit, 3,4-dihidroksibenzoik asit, kafeik asit, ferulik asit, p-kumarik asit, taksifolin ve apigenindir. Tirozol ve oleuropeinin, 2007-2008 hasat döneminde 1,80-13,39 mg/kg, 1,26-19,50 mg/kg ve 2008-2009 hasat döneminde ise 1,76-11,66 mg/kg, 0,20-13,12 mg/kg aralığında en fazla miktarda değişen bileşenler olduğu saptanmıştır.
اظهر المزيد [+] اقل [-]Thermal Inactivation of Salmonella Enteritidis Inoculated to Cake and Chicken النص الكامل
2018
Ceyda Dadalı | Duygu Kışla
In this study, thermal inactivation of Salmonella Enteritidis inoculated to the cake dough and a whole raw chicken was investigated. The cake dough was inoculated with 6.15 log-cfu/g S. Enteritidis then, thermal treatment was applied at 160°C top-bottom fan cooking mode. The initial count of S. Enteritidis showed reductions 1.49 log-cfu/g, 2.06 log-cfu/g and 4.29 log-cfu/g in the samples from the cold point location from the geometric center of the cake at 5, 7 and 10 minutes of thermal treatment, respectively. Although S. Enteritidis is not detected at the end of 15 minutes of heat treatment, the center of the cake temperature has reached 85.69°C and the cake sample is uncooked and its sensory properties are not acceptable. The cake that is safe and favorable with the sensory properties to the consumers was obtained by heat treatment for 30 minutes. After the cold point of a whole raw chicken was inoculated with 7.29 log-cfu/g S. Enteritidis, thermal treatment was applied at 220°C top-bottom fan cooking mode. The temperature at the cold point of 35 and 45 minutes heat-treated chickens reached 59.33 and 74.08°C, respectively, and 1.93 log-cfu/g and 5.33 log-cfu /g S. Enteritidis reduction caused in the samples respectively. S. Enteritidis cells were not detected in the whole chicken heat treated at 220°C for 60 minutes. The cakes, heat treated at 160°C top-bottom fan cooking mode for 30 minutes, were stored at two different storage temperatures as 4°C and 25°C for 72 hours. The whole chicken, heat treated at 220°C top-bottom fan cooking mode for 60 minutes, was stored at 4°C for 72 hours. S. Enteritidis cells were not detected in the cake and the whole chicken samples after the storage period.
اظهر المزيد [+] اقل [-]Toxicity and Reproductive Parameters Impairment of Cypermethrin in Male Guinea Pig (Cavia porcellus) النص الكامل
2018
Bertin Narcisse Vemo | Augustave Kenfack | Ferdinand Ngoula | Edouard Akono Nantia | Claude Cedric Njieudeu Ngaleu | Arthénice Jemima Nounamo Guiekep | Astride Martine Megnimeza Tsambou | Ferry Nana Yidjeu | Chancel Patrick Nelo | Alexis Teguia
Cypermethrin is a large spectrum action insecticide, globally employed to control pests in agriculture and some human and domestic animals ectoparasites. This study aimed to evaluate its toxicity and reproduction impairment in male guinea pig. Forty adult male guinea pigs were divided into 4 groups and orally submitted to 0, 92, 137.5 and 275 mg/kg body weight/day for 90 days. The weight of the liver increased significantly, while that of kidneys decreased significantly in treated animals compared to controls. Serum concentrations of creatinine, urea, ALAT, ASAT, total cholesterol, prostatic acid phosphatase increased significantly, while the testicular total protein level decreased significantly in groups given the insecticide relatively to the control. The testes weight, libido, serum level of testosterone, mobility, sperm count and the percentage of spermatozoa with entire plasma membrane decreased significantly in animals exposed to cypermethrin with reference to controls. The percentages of abnormal spermatozoa increased significantly in animals submitted to 137.5 or 275 mg/kg body weight (bw) of cypermethrin compared to control ones. On the testis histological sections of pesticide-treated animals, immature germinal cells were observed in the lumen of seminiferous tubules. Cypermethrin was toxic in male guinea pig and damaged reproductive parameters.
اظهر المزيد [+] اقل [-]Effect of Pulsed Ultraviolet Light on Natural Microbial Load and Antioxidant Properties of Fresh Blueberries النص الكامل
2018
Senem Guner | Zeynal Topalcengiz
Blueberries have been drawn more attention in recent years for their antioxidant capacities and proposed health benefits. Pulsed ultraviolet (PUV) light is known for its disinfection effects on the surface of fresh fruits. This study’s aim was to examine the effects of PUV light on naturally present microbial load, antioxidant capacity, and antioxidant enzyme activity of fresh blueberries. Fresh blueberry samples were treated for 30, 60, 90, and 120 s. Samples were stabilized at 13 cm away from the PUV lamp before treatment. Total Aerobic Plate Count (TAPC) and yeast and mold count reduction were observed the highest in samples treated for 90 s, 1.97 and 1.27 log CFU/g, respectively. Antioxidant capacity levels were significantly different for treated samples for 60 and 90 s in FRAP analysis, whereas no differences were observed in results of DPPH analysis. Superoxide dismutase (SOD) activity as antioxidant enzyme had no difference, however, glutathione peroxidase (GPx) increased by 50% with PUV treatment for 120 s. PUV light treatment of fresh blueberries for 90 s was determined as ideal exposure time among tested time intervals of this study. PUV light illumination can generally enhance antioxidant capacity and antioxidant enzyme activity of fresh blueberries and decrease the population of natural microorganisms of fresh blueberries and similar small fruits.
اظهر المزيد [+] اقل [-]Organik ve Konvansiyonel Üzüm Yetiştiriciliği Yöntemlerinin Asmadaki Bitki Besin Maddesi İçeriklerine Etkisi النص الكامل
2018
Fadime Ateş | Bülent Yağmur | Çiğdem Takma
Bu çalışma üzüm üretiminde organik ürün aşaması olan 2006 ve 2007 yıllarında Manisa Bağcılık Araştırma Enstitüsü’ne ait Alaşehir-Yeşilyurt işletmesindeki, sulanabilir şartlarda, 15 yaşındaki Sultani Çekirdeksiz parselinde gerçekleştirilmiştir. Bu araştırma, Sultani Çekirdeksiz üzüm üretiminde önemli bir potansiyele sahip olan Manisa Alaşehir yöresinde organik ve konvansiyonel üretim yöntemlerinin yaprak ayası ve yaprak sapının besin elementleri içeriği (N, P, K, Ca, Mg, Fe, Zn ve Mn) üzerine etkisini belirlemek amacıyla yapılmıştır. Tesadüf blokları deneme desenine göre 3 tekerrürlü olarak kurulan denemede organik ve konvansiyonel yetiştirme tekniği yöntemleri uygulanmıştır. Araştırma sonucunda Sultani Çekirdeksiz üzüm çeşidinin beslenmesi içeriği açısından konvansiyonel ile organik üzüm üretim yöntemleri birbirleriyle karşılaştırıldığında organik üretim yönteminde asmanın yaprak ayası ve yaprak sapının bitki besin maddesi içeriklerinin konvansiyonel yönteme göre daha yüksek değerlere sahip olduğu tespit edilmiştir.
اظهر المزيد [+] اقل [-]The Investigation of Antidiabetic Effects of Leontice leontopetalum Extract on Human Pancreatic β Cell Lines (1.1B4) Treated with Streptozotocin النص الكامل
2018
Celal Güven | Eylem Taşkın | Önder Yumrutaş | Leyla Türker Şener | Fulya Dal | Mufide Ahbab | İbrahim Bozgeyik | Işıl Albeniz | Haydar Bağış | Mustafa Pehlivan | Fatih Üçkardeşler | Handan Akçakaya
One of the alternative therapeutic methods is herbal medicine. Leontice leontopetalum belongs to Berberidaceae family. The aim of study was investigated the extract of LL on human pancreatic beta cell-treated with STZ. Materials and methods: The human pancreatic beta cell (1.1B4) line was used the current study. LL’s extracts (1, 10, 100, and 1000 ug/ml) were supplemented in media for twenty-four hours and/or after STZ treatment (10 and 20 mM). Cells survivals (MTT), cells proliferation were shown by using xCelligence. Insulin content and releasing were measured at 1.1, 8.4 and 16.7 mM glucose concentrations. Results: The result of MTT was shown that cell survival was decreased, based on dose-dependent. When looked at xCelligence results, cell proliferation in STZ groups and the lowest and highest concentrations of LL were attenuated in a dose-dependent manner. Also, cotreatments of LL and STZ were decreased as well. The result of insulin-releasing on glucose induction was shown that STZ concentration gave rise to reduce insulin content at low and high glucose levels. Also, co-treatment of LL and STZ attenuated insulin content based on dose. Conclusion: It was considered that LL treatment led to increased insulin realizing, resulting from decreasing insulin content in diabetic beta cells, but decrease cell survival.
اظهر المزيد [+] اقل [-]