خيارات البحث
النتائج 491 - 500 من 5,301
Vulnerability of Rice Farmers to Climate Change in Kwara State, Nigeria النص الكامل
2022
Sheu-Usman Oladipo Akanbi | Olanrewaju Solomon Olatunji | Olamide Sulaiman Oladipo | Uswat Temitayo Adeyemi | Akinyinka Akinyoade
Climate unpredictability and weather extremes are being projected as capable of presenting additional challenges for farmers currently engaged in the low-technology based food production systems in sub-Saharan countries like Nigeria. This study assessed rice farming households’ vulnerability to climate change in Kwara State, Nigeria. Primary data, collected from 150 respondents using simple random sampling procedure were analysed employing descriptive statistic was use to describe the coping strategies adopted and Human Development Index (HDI) was created to assess vulnerability of rice farmers to climate change. Statistical analyses indicated a vulnerability assessment index of 0.3001, pointing to a fact that the zone is prone to the adverse effects of climatic variability. For this reason, the study empirically underscores the need for farmers to adopt and adapt the planting of drought tolerant and/or early maturing varieties of rice. Importantly, the capacities of the local communities needs to be strengthened vis-à-vis the relationship between climate change and crop production. Capacity building at the farm level is crucial for improving crop, soil and water management, enhancing the demand for and use of better and more efficient production inputs. Tied to farm-level capacity building is the need to refocus public agricultural-based institutions towards exposing the rice farmers to effective mitigation strategies in the wake of climate change, provision of agricultural inputs, expansion of irrigation, efficient and effective extension service delivery, market development and other forms of necessary support.
اظهر المزيد [+] اقل [-]Pseudomonas aeruginosa and Its Pathogenicity النص الكامل
2022
Nida Nur Urgancı | Nazife Yılmaz | Gamze Koçer Alaşalvar | Zeliha Yıldırım
Pseudomonas aeruginosa, belonging to the Pseudomonadaceae family, is Gram-negative, rod-shaped, motile, aerobic, endospore negative, oxidase and catalase positive. It is widely found in nature and isolated from soil, plants, water and animals. It can grow rapidly on the surface of the food and form oxidized products and mucous substances. P. aeruginosa, one of the leading foodborne pathogens, causes important concerns in food safety due to being a source of contamination, causing food poisoning and antimicrobial resistance in animals, forming biofilms and difficulties in preventing biofilms. In this review, information on history, microbiological, cultural and biochemical characteristics, virulence factors and pathogenicity of P. aeruginosa are given. In addition, infections caused by P. aeruginosa and its presence in food are described.
اظهر المزيد [+] اقل [-]Evaluation of Genotoxic Effect of Phloxine by Allium Test النص الكامل
2022
Nergis Kaya
Phloxine is used as a food dye. In this study, genotoxicity of phloxine at the root tip of Allium cepa L. was investigated. A. cepa L. meristematic root tip cells were treated with ten different doses of phloxine. In this way, the EC50 value was determined. Then, phloxine was applied to root tips at EC50/2, EC50 and EC50×2 doses. Treatment time was determined as 24, 48 and 72 hours. As a result, it was revealed that phloxine caused chromosomal aberrations in cells in mitotic cycle at the root tip of A. cepa. There are equatorial plate shifting in metaphase, laggard chromosome, disturbed spindle, chromosome stickiness, C-mitosis, polar shifting among the observed chromosomal aberrations. It was stated that the % chromosomal aberration index (CAI) increased depending on concentration increase. It has been demonstrated that the highest % chromosomal aberration index occurred at the EC50×2 dose for 72 hours. According to the research, it was revealed that phloxine has a genotoxic effect on the root cells of A. cepa. For this reason, it can be emphasized that care should be taken in its use in foods.
اظهر المزيد [+] اقل [-]Essential Oil Composition of Lavender (Lavandula angustifolia Mill.) at Various Plantation Ages and Growth Stages in the Mediterranean Region النص الكامل
2022
Muzaffer Barut | Leyla Sezen Tansı | Sengul Karaman
demand for its essential oil continues to grow on a global scale. The fact remains that harvesting at the right time of growth is critical to maximizing the rate of active ingredients found in the plant. Thus, in the current study, L. angustifolia plants were collected at various growth stages (pre-flowering, mid-flowering, and post-flowering) from Adana, Turkey in order to determine the most suitable harvest time for the highest amount of essential oils and its important compounds. The highest flower essential oil content (7.50 mL 100 g-1) was obtained at mid-flowering of the third year of plantation. The major compounds for L. angustifolia were linalyl acetate (25.63-31.63%), linalool (16.33-24.79%), nerol (8.83-13.43%), beta-farnesene (3.67-5.70%), β-cis-ocimene (1.76-8.14%), respectively. The obtained data have been inquired by principal components analysis (PCA), allowing differentiation of plantation ages and growth stages. Compared to the plantation ages, essential oil content and linalool content increased significantly in the third year of cultivation. As a result, the most suitable harvest time may be considered as mid-flowering in terms of essential oil content and in terms of high linalyl acetate and linalool content.
اظهر المزيد [+] اقل [-]Alkali Extraction of Dietary Fiber from Trigonella-foenum graecum L. Seeds (Dietary Fiber of Fenugreek Seeds) النص الكامل
2022
İzzet Türker | Sedanur Daştan | Hilal İşleroğlu
In this study, alkali dietary fiber extraction method was evaluated to obtain soluble and insoluble dietary fiber from Trigonella-foenum graecum L. (fenugreek) seeds. The process conditions of alkali extraction method ensuring the highest total dietary fiber yield were investigated by response surface methodology. Furthermore, some physicochemical and functional properties of extracted soluble and insoluble dietary fiber from fenugreek seeds such as water retention capacity, oil adsorption capacity, swelling capacity, glucose adsorption index and α-amylase inhibition capacity were determined. Total dietary fiber yield was 78% at 52.50 g/L of sample: NaOH ratio and 1.01 M NaOH concentration as the optimum process conditions. Furthermore, insoluble dietary fiber gave better results than soluble dietary fiber when physicochemical and functional properties were compared.
اظهر المزيد [+] اقل [-]Rasyona Ham ve Kavrulmuş Elekaltı Fasulye İlavesinin Yumurtlayan Bıldırcınlarda Performansa, Yumurta Kalitesine ve Serum Biyokimyasal Parametrelerine Etkisi النص الكامل
2022
Ayşe Sueda Özçalık | Osman Olgun
Bu çalışmanın amacı atık bir ürün olan elekaltı fasulyenin yumurtlayan bıldırcın rasyonlarında ham ve kavrulmuş olarak kullanılmasının performansa, yumurta kalitesine ve serum metabolik profiline etkisini incelemektir. Bu amaçla 70 günlük yaşta toplam 160 adet dişi Japon bıldırcını 4 seviye (0, 6, 12 ve 18) elekaltı fasulyenin ve 2 işlem tekniğinin (ham ve kavurulmuş) oluşturduğu 8 muamele grubuna 5 tekerrürlü olarak rastgele dağıtılmıştır. Kontrol grubu ile karşılaştırıldığında yem tüketimi ve yemden yararlanma oranı %12 elekaltı fasulye seviyesinde olumsuz etkilenmiş ve %18 seviyesinde olumsuz etki daha da belirgin olmuştur. Yumurta kitlesi ve kabuk kırılma direnci rasyonda elekaltı fasulye kullanımından istatistiki olarak etkilenmiş ve bu parametreler için en iyi sonuçlar %6 seviyesinde elde edilmiştir. Kabuk kalınlığı %12 ve 18 elekaltı fasulye seviyesinde önemli derecede azalmıştır. Bıldırcınların serum glukoz konsantrasyonu rasyonda %18 elekaltı fasulye kullanımı ile ve serum fosfor konsantrasyonu ise %6 seviyesinde elekaltı fasulye kullanımı ile önemli derecede artmıştır. Elekaltı fasulyenin kavrulması ile yumurta verimi, yumurta kitlesi ve yem değerlendirme ile serumun total protein, albümin ve fosfor konsantrasyonları önemli derecede iyileşmiştir. Elekaltı fasulye seviyesi ve işlem tekniğinin oluşturduğu interaksiyonları sadece kabuk kalınlığına ve serum glukoz konsantrasyonunu istatistiki olarak etkilemiştir. Çalışmadan elde edilen sonuçlara göre elekaltı fasulye yumurtlayan bıldırcın rasyonlarında %6 seviyesine kadar kullanılabileceği ve kavurma işleminin performans ve serum parametrelerini iyileştirdiği gözlenmiştir.
اظهر المزيد [+] اقل [-]Performance of a Metering Unit Equipped with a Fluted Roll for Seeding Coriander Seeds (Coriandrum sativum L.) النص الكامل
2022
Hürkan Tayfun Varol | Adnan Değirmencioğlu
The objective of this study was to find out the performance of a seeding unit metering coriander seeds (Coriandrum sativum L.) with a fluted roll. As a first step for the determination of the performance of the metering unit, flow rate measurements were achieved at a combination of five roll lengths and ten different rpm values with three replications. The coefficient of variation (CV, %) was calculated and each CV value was used to characterize the flow evenness. The seed distributions were obtained at three seeding rates (15, 20 and 25 kg ha-1) and three forward speeds (1.0, 1.5 and 2 ms-1). The data obtained from the sticky belt test stand experiments; the seed distribution uniformity was evaluated based on two performance criterion. One of them was the variation factor (Vƒ) and the other one was the goodness criterion (λ). The CV (%) values of flow evenness were found to vary between 0.28 and 1.05%. On the other hand, the variation factor (Vƒ) values were found to range from 0.65 to 0.83 and these values indicated that the seeding can be characterized as precision seeding at all combinations of three seeding rate and three forward speeds. The goodness criterion (λ) values varied between 69 % and 77.3%. Based on the evaluation range of the goodness criterion (λ), the seeding at a seeding rate of 15 kg ha-1 and forward speed of 1.0 ms-1 along with the seeding rate of 20 and 25 kg ha-1 at a forward speed of 1.0 and 1.5 ms-1 was classified as very good. The rest of the four seeding rates and forward speeds combinations, the goodness criterion (λ) was evaluated to be good quality.
اظهر المزيد [+] اقل [-]Impact of Microplastic Pollution on Biota in the Turkish Territorial Waters النص الكامل
2022
Idris Koraltan | Olgaç Güven
Plastics are high demand raw material with applications in many industries due to their low costs and easily processable structures. Increasing plastic production in line with the high demand and inadequate waste management of plastic waste gives rise to accumulation of these wastes in terrestrial and aquatic ecosystems. It has been reported that microscopic size plastics (microplastics) (
اظهر المزيد [+] اقل [-]Connection of Fisheries Management and Ballast Water Management Contract (Bwm Convention, 2004) النص الكامل
2022
Serpil Yilmaz | Esra Erikçi Bilgin
Although land-based pollution is expressed as the most important pollution factor in the pollution of the seas (80%), the rate of pollution originating from ships (approximately 20%) is not to be underestimated. The fact that marine pollution is caused almost exclusively by ships requires investigation of the measures to be taken against marine pollution from ships and their applicability. As a matter of fact, the most important cause of pollution caused by ships is ballast water, and it has been determined that over 7,000 marine organisms are transported between ports with ballast waters on a global scale every day. Ballast water is used to maintain the balance of the ship on the water when the ships are not loaded. Considering that 90% of international trade is still provided by ships and 3-5 billion tons of ballast water is transported by approximately 85,000 ships every year with world maritime trade, the importance of pollution caused by ballast water becomes apparent. While ballast water is one of the elements that cause the transport of exotic marine and freshwater organisms between all seas of the world and cause pollution, the pollution in question is very effective especially in the aquaculture sector. Therefore, in this article, the connection of ballast water with fisheries management has been examined and solutions have been sought for the problems.
اظهر المزيد [+] اقل [-]The Effects of Some Rhizobacteria Species on Plant Development and Fruit Quality in Melons Grown Under Irrigated and Non-Irrigated Conditions النص الكامل
2022
Özlem Altuntaş | İbrahim Kutalmış Kutsal
It has been determined in many research results that plant growth promoting rhizobacteria (PGPR) affect yield, plant growth and fruit quality and play an important role. However, the use of biostimulants in agricultural production in Malatya is negligible. In order to contribute to the region's producers, a research was planned directly in the producer's garden in the Malatya/Arguvan region, which is an important melon production center. A trial was established with Arguvan (Narmikan) melon type and Kırkağaç 637 melon cultivars, which are the most grown local cultivars in the summer period of plant growth-promoting rhizobacteria in irrigated and non-irrigated melon cultivation in Malatya-Arguvan conditions, and the trial was repeated for two consecutive years. In the research, Bacillus subtilis, Bacillus megatorium, Enterococcus spp. and cocktail bacteria solutions, which are a mixture of these three bacteria were used. Inoculation of bacteria into seeds was done by soaking the seeds in bacterial solution for 24 hours. The effects of the use of bacteria on the fruit quality of melon in cultivation with the method of seed sowing in the field were determined. In the study, the presented of which are resulted in fruit only pomological porperties ; fruit height, fruit weight, fruit flesh thickness, fruit shell thickness, fruit diameter, seed cavity diameter, pH and WTSS contents were examined, and two-year results were presented. The effects of different bacteria on the fruit pomological properties were not found statistically significant except for the TSS values of Kırkağaç 637 cultivars grown under non-irrigated conditions. The effects of different bacteria on the fruit pomological characteristics of Kırkağaç 637 melons grown under non-irrigated conditions were found statistically significant, although there were differences in other parameters, it was not statistically significant. Bacillus subtilis bacteria application has been the prominent bacterial application in terms of fruit characteristics.
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