خيارات البحث
النتائج 201 - 210 من 477
Ökse Otu (Viscum album ssp. austriacum) Yaprak ve Tomurcuk Ekstraklarının Antioksidan Kapasitelerinin Belirlenmesi
2022
Fatma Ergün
Bu çalışmada, Kuzeydoğu Anadolu Sarıçam (Pinus sylvestris L)’ ormanlarından toplanan ökse otu (Viscum album ssp. austriacum, çeküm) bitkisinin yaprak (Y) ve tomurcuklardan (T) elde edilen metanol ekstraklarının toplam fenolik ve flavonoid madde miktarı ve antioksidan kapasitesiteleri belirlendi. Toplam fenolik madde miktarı Y’de 19,55 ±4,68 mg GAE/g, ve T’de 16,88 ±2,77 mg GAE/g olarak, toplam flavonoid madde miktarları Y’de 17,56 ±2,53 mg KE/g ve T’de17,17 ±3,29 mg KE/g olarak tespit edildi. IC50 değerleri ise Y’de 476,26 ±22,54 μg/mL ve T’de 778,57±25,61 μg/mL olarak hesaplandı. Ayrıca Fe3+-Fe2+ indirgeyici antioksidan güçleri askorbik aside eşdeğer olarak Y’de 303,00 ±1,73 μg AAE/mL ve T’de ise 307,01±1,05 μg AAE/mL olarak hesaplandı. Sonuç olarak sarıçamlar için zararlı olarak kabul edilen ökse otunun antioksidan özelliğine sahip olduğu görüldü. Zararlı ile mücadele sırasında toplanan ökse otlarının doğal antioksidan kaynağı olarak değerlendirilmesinin ekonomik olarak katkı sağlayabileceği kanaatine varılmıştır.
اظهر المزيد [+] اقل [-]Determination of Biocontrol Potential of Bacillus spp. and Stenotrophomonas sp. against Macrophomina phaseolina in Sunflower
2022
Özden Salman | Raziye Koçak | Nuh Boyraz
Macrophomina phaseolina is a soil pathogen known as charcoal rot and can cause up to 90% yield loss in sunflower under suitable conditions. The serious damage caused by chemicals used in the control of soil-borne pathogens to the environment and health has become one of the most important concerns in agriculture. Therefore, in our study, it was aimed to determine the in vitro antagonistic effects of various bacterial species against M phaseolina. A total of 38 bacterial strains were isolated from soil samples in the rhizosphere of Malva sylvestris (hibiscus), Vicia sativa (vetch), Cicer arietinum (chickpea), Papaver rhoeas (weasel), Carlina marianum (thistle), Glebionis coronaria (crown daisy) and Vicia faba collected from Urla district of İzmir. All bacterial strains exhibited antibiosis effect under in vitro conditions, but it was determined that 5 bacterial isolates among them showed a high inhibition zone and showed an average inhibition potential ranging between 55% and 74%. The most effective bacteria identified at species and genus level by Maldi biotyping (MALDI-TOF MS) were identified as Bacillus amyloliquefaciens, Stenotrophomonas sp. and Bacillus cereus (3 isolates), and these species showed that they can be important biocontrol agents in biological control against M. phaseolina.
اظهر المزيد [+] اقل [-]Determination of the swim bladder parasite Anguillicola crassus (Nematoda, Dracunculoidea) in the European Eel, Anguilla anguilla (Linnaeus, 1758) from the locality Çamalti Tuzla of Izmir Bay, Eastern Aegean Sea
2022
Şule Gürkan | Burcu Taylan | Ertan Taşkavak
We, here, aimed to determine the presence of Anguillicola crassus, a swim bladder parasite, in 89 (male: 45, female: 44) dead European eel specimens obtained seasonally between 2020-2021 from a regional fisherman, who has fished with fyke net in the locality Tuzla of Izmir Bay, Eastern Aegean Sea. Out of 21 male European eels caught in winter, only one specimen (TL: 48.5 cm and TW: 247.12 g) had 23 swim bladder parasites (adult nematodes: 15, larvae: 8) and similarly, only one parasite was found in one specimen (TL: 37.5 cm and TW: 88.47 g) of 8 eels caught in spring. No parasite was found in the female eels. At the examinations, it was determined that all adult Anguillicola crassus specimens were females and the minimum-maximum and average length values in adult and larval parasites were, respectively, 1.5-2.5 cm (1.99 ± 0.31) and 0.7-1.3 cm (1.025 ± 2.40). Consequently, the species A. crassus, a swim bladder parasite, was found in European eels from the locality Çamalti Tuzla in two seasons (winter and spring) and this parasitic nematode were only in male eels. This study is a first and remarkable one having evidential value, which shows the presence of the species A. crassus among the eel population in the locality Çamalti Tuzla of Izmir Bay. Besides, it is a population that should be monitored due to the status of Anguilla anguilla on the IUCN red list.
اظهر المزيد [+] اقل [-]Changes in Udder Surface Temperature and Milk Quality Characteristics in Cows during the Hot Season
2022
Hüseyin Erdem | İbrahim Cihangir Okuyucu
The aim of this study was to determine the relationships of udder surface temperature (UST) with milk components, and somatic cell count (SCC) in dairy cows during the hot season. The study was carried out with 115 lactating dairy cows (Holstein, Simmental, and Holstein × Simmental) at a private dairy farm in Samsun, Turkey, with monthly visits. The UST was measured from the udder surface before cleaning and milking. At the same time, a portable cell counter and an automatic milk analyzer were used to determine the components and the SCC of the raw milk. The UST values of the cows changed significantly. Increased UST had an adverse effect on milk solids-non-fat (SNF), protein, lactose, and density levels. LogSCC values of cow groups with UST ≤35.0°C, 35.1-36.0°C, >36.0°C were found to be 4.475±0.0803, 4.774±0.1244, and 4.981±0.1491 respectively. The UST negatively correlated with SNF, protein, lactose, density, and freezing point, but positively correlated with LogSCC. As a result, performing UST measurements before milking may be beneficial to monitor udder health and to obtain high quality milk.
اظهر المزيد [+] اقل [-]Total Antioxidant and Oxidant Status and DPPH Free radical activity of Euphorbia eriophora
2022
Hasan Akgül | Falah Saleh Mohammed | Eylem Kına | İmran Uysal | Mustafa Sevindik | Muhittin Doğan
Plants have been used for many purposes in different communities. Plants used in alternative medicine since ancient times have been the main material in the treatment of many diseases. In this context, it is very important to determine the biological potential of plants. In our study, total antioxidant status, total oxidant status, oxidative stress index and DPPH free radical scavenging activity of Euphorbia eriophora Boiss. were determined. The aerial parts of the plant were extracted with ethanol in a Soxhlet device. TAS, TOS and OSI values of the plant extract were determined using Rel Assay kits. In addition, the free radical scavenging activity of the plant extract was measured by the DPPH method. As a result of the studies, the TAS value of the plant extract was 5.390±0.227, the TOS value was 20.971±0.348, and the OSI value was 0.390±0.014. The DPPH activity of the plant extract was determined to have an inhibition value of 68.721±1.694% at 2 mg/mL concentration. As a result, in our study, it was determined that E. eriophora has antioxidant potential and can be used as a natural antioxidant agent in this context.
اظهر المزيد [+] اقل [-]Effect of Silver Nanoparticles Treatments on Some Characteristics of “Santander” Lily Cultivar
2022
Onur Sefa Alkaç | Osman Nuri Öcalan | Mehmet Güneş
The use of silver nanoparticles (AgNPs) in the fields of agriculture and horticulture has been increasing recently due to contribution to seed germination, plant growth and development, flowering, yield, and physiological improvements. This research aimed to investigate the effects of silver nanoparticles on the growth and flowering characteristics of the 'Santander' lily (Lilium L.) variety and to determine its potential for use in cultivation. Before planting the plant bulbs immersed in AgNPs solutions of 0 (control), 50, 75, 100, 125 and 150 ppm. After harvest; weight, circumference, height, root length, fresh and dry weight, stem root length, fresh and dry weight of stem, plant height, plant stem diameter, fresh plant weight, bud number and vase life were determined. As a result; it has been indicated that AgNPs solutions in different concentrations increased the quality and quantity of cut flowers and bulbs in lily plants. AgNPs increased an average of 26.29% when compared with control in all morphological characteristics except for the vase life. In the light of these findings, AgNPs applications can be preferred as a method that can be used on lily cultivation and reproduction. Nevertheless, considering the deficiency of treatments of AgNPs in lily plants and their poorly known effect on plants, further detailed studies are necessary.
اظهر المزيد [+] اقل [-]Effect of Ginger (Zingiber officinale) Addition to the Diet on Performance, Serum Parameters and Meat Quality in Male Japanese Quails (Coturnix coturnix Japonica)
2022
Seyit Ahmet Gökmen | Behlül Sevim | Barışcan Curabay | Kübra Ünal | Yusuf Cufadar | Yılmaz Bahtiyarca
This study was carried out to determine the effect of adding ginger powder at different levels (0.0, 0.5, 1.0, 2.0%) to the ration on performance, blood parameters and meat quality characteristics of male Japanese quails. 48 male Japanese quail (Coturnix coturnix Japonica) at 28 days of age were used in the study. The experiment was carried out for 21 days in 4 replications in a quail cage with 12 male Japanese quails in each of 4 treatment groups consisting of rations containing different levels of ginger powder. At the end of the experiment, the effects of adding different levels of ginger powder to male quail diets on the performance and serum parameters studied were statistically insignificant. Pre breast L*, a* and b*, thigh meat colours a* and b* values were not significantly affected by the treatments. However, pre-thigh L* values were significantly lower in the group fed with 2.0% ginger powder compared to the group fed with 0.5% and 1.0% ginger powder. Post breast b* value of the group containing 2.0% ginger powder in the diet was significantly higher than that of the group containing 0.5% and 1.0% ginger powder. It was observed the treatment group containing 2.0% ginger powder significantly decreased the pH value and TBA (thiobarbituric acid number) values at the breast meats when compared to the control group and the treatment group containing 0.5% ginger powder. According to the result of the study, it was observed that the addition of ginger powder to male quail rations did not affect performance and serum parameters, but the use of ginger powder at the level of 2.0% in the diet improved some meat quality characteristics.
اظهر المزيد [+] اقل [-]The Effect of Different Estrus Synchronization Methods on Reproductive Performance in Laparoscopic Artificial Insemination Program in Morkaraman Sheep
2022
Müzeyyen Kutluca Korkmaz | Mustafa Yaprak
This study investigated the reproductive performance, lamb survivability, and growing performance of Morkaraman ewes, the estrus of which was induced by natural and synthetic progesterone and which were inseminated by laparoscopic technique at the end of the mating season (December). In the study, 5 different estrus synchronization methods (CIDR, Crestar, Natural progesterone, Cronolone and MAP), 100 Morkaraman ewes, and lambs born to them were used. After the completion of the estrus synchronization methods, the first sign of estrus was detected earliest in the natural progesterone group (39.53±1.87 hours), and there was a significant difference between the natural progesterone and vaginal sponges containing MAP and Cronolone concerning the time to the first hour of estrus. Estrus rates were found significantly different across the study groups, with the shortest time to estrus having been achieved by MAP. The lambing rates for CIDR, Cronolone, Natural progesterone, MAP, and Crestar groups were 74%, 61%, 56%, 33%, and 10%, respectively. There was no significant difference between the treatment groups concerning birth weight, weight at various periods, and survivability of lambs although a significant difference was found in their weaning weight.
اظهر المزيد [+] اقل [-]The Effect of Different Cover and Flooring Materials on Climatic Comfort in Landscape Design
2022
Orhun Soydan | Ahmet Benliay
In this study, it is aimed to understand the effects of structural and vegetative elements that can be used in landscape designs on the temperature factor, which will greatly affect the climatic comfort, by using artificial neural networks. In this context, measurements were carried out in the morning (08:00-09:00), noon (13:00-14:00) and evening (17:00-18:00) of a total of 100 days, 50 days in each of the winter and summer seasons, at 7 randomly selected points in the Akdeniz University Campus. In these measurements, the temperature difference values of 11 cover elements on 7 different floor covering types were measured, and the ambient air temperature, humidity and wind values were also determined. The temperature differences between the areas where the flooring elements are exposed to direct sun and the shadow effect of different plant and cover elements were determined using an infrared laser thermometer. These values were processed with Neural Designer software and possible temperature difference prediction values were created for 57.750 different alternatives with the help of artificial neural network model from 837 sets of data. Evaluation shows that the maximum temperature difference is 15.6°C at noon in the summer months in the red tartan flooring material and Callistemon viminalis cover material. While the artificial neural network model predicts that there will be a high 2-3° C temperature difference for the alternatives, it has made predictions for temperature differences between 0-10°C in winter and 0-16°C in summer months. Although the temperature differences that will occur in the noon hours are distributed over a wide range of values, it seems that the morning and evening forecasts are concentrated between 0-7°C values. Also, it has been determined that the wind and humidity in the environment are more important factors than the ambient temperature in terms of temperature differences.
اظهر المزيد [+] اقل [-]Effects of Vermicompost and Mycorrhiza Applications on Seedling Growth of Cowpea in Lime Soil
2022
Sezer Şahin | Seda Bice Ataklı
Organic matter has a positive effect on the uptake of nutrients in the soil. The increase in mycorrhizal activities in the soil causes an increase in the activities in the rhizosphere region. Vermicompost is among the most useful organic fertilizers that can be added to the soil in recent years. Soil microflora is capable of realizing the return of mineral substances. Akkız cowpea variety was used in the study: The experiment was carried out as a viol study with 3 replications according to the randomized blocks trial design. In the study, seedling development was achieved by mixing vermicompost (0, 15, 30 and 45%) with and without mycorrhiza in a soil containing 16% lime into the viols in order to develop seedlings. Sufficient minerals have been applied to the plants for their growth. Seedlings were harvested when they were 40 days old, and seedling measurement parameters and macronutrients in plant leaves were checked. As the amount of vermicompost increased, it caused an increase in the above-ground fresh and dry weights, root fresh and root dry weights of the seedlings. As the organic fertilizer mixture increased, the nitrogen, phosphorus, potassium and magnesium concentrations of the plant leaves increased. The addition of mycorrhiza to the rearing medium has led to different results in the investigated characteristics. Addition of increasing organic fertilizer ratios in the study, Organic fertilizer and bacteria application of cowpea cultivars were effective in increasing the development of plants in calcareous soils.
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