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Hydro-Physical Properties of Soils under Different Land Uses in Northeastern Nigeria Texto completo
2021
Ibraheem Alhassan | Muhammad Saddiq Askira
Evaluation of soil hydro-physical properties is very important in agriculture and for sustainable management of the land resources. This investigation was conducted to assess some hydro-physical properties of soils in different land use types (LUT) selected (i.e., dry upper land (UD), lowland (LL) and residential area (RA)) at 0-15cm and 15-30cm depths in Bade Local Government Area of Northeastern, Nigeria. Soils were randomly sampled at four points in each LUT and analyzed according to standard soil analysis procedures. Results of the analyses of variance showed that LL had recorded significantly higher clay content, larger soil porosities and high-water retention properties than the other LUT. Soil structural stability index (SSI) and organic carbon (OC) were below optimal range and statistically not different across the land uses. The results also indicated non-significant differences in the hydro-physical properties within the sampling depths. The coefficient of variation (CV) revealed that, slight variation (CV
Mostrar más [+] Menos [-]Beyaz ve Kahverengi Varyetelerine Göre Japon Bıldırcın’larının (Coturnix coturnix japonica) Canlı Ağırlık ve Zoometrik Yapılarının Belirlenmesi Texto completo
2021
Yusuf Ziya Oğrak | Abdullah Özbilgin | Recep Gümüş | Milivoje Uroševıć
Bu çalışma, Japon Bıldırcınlarının (Coturnix coturnix japonica) beyaz ve kahverengi iki farklı varyetesinde, bazı zoometrik ölçümler ve canlı ağırlıkların, karşılaştırmalı olarak belirlenmesi amacıyla yapılmıştır. Bunun için aynı beslenme ve çevre şartlarında barındırılan, beyaz ve kahverengi varyetelerinden 30'ar (15 erkek, 15 dişi), toplam 60 adet, altı haftalık yaştaki bıldırcında, canlı ağırlıklar ve on iki farklı vücut ölçümüne ait değişkenler değerlendirilmiştir. Altı haftalık yaştaki ortalama canlı ağırlıklar açısından literatür bildirimlerinin birçoğuna göre daha yüksek değerler elde edilmekle birlikte bu çalışmada karşılaştırılan iki renk varyetesi açısından herhangi bir fark görülmezken, dişiler erkeklerden istatistiki olarak anlamlı olacak şekilde daha ağır bulunmuştur. İstatistiki anlamlılıkların elde edildiği zoometrik ölçümlerden kafa genişliği, gaga uzunluğu, gaga genişliği, sternum uzunluğu, bacak uzunluğu ve kanat uzunluğu açısından beyaz bıldırcınlar kahverengi olanlardan daha yüksek değerlere sahip olurken cinsiyete göre ise canlı ağırlık, vücut uzunluğu, göğüs çevresi ve tarsus çevresi değişkenlerinde dişiler daha yüksek değerler almışlardır. Altı haftalık yaştaki Japon bıldırcınlarının canlı ağırlıkları ile kafatası uzunluğu, beden uzunluğu, sternum uzunluğu, orta parmak uzunluğu, kanat uzunluğu, göğüs çevresi ve tarsus çapı değişkenleri arasında pozitif korelasyonlar tespit edilmiştir. Bıldırcın yetiştiriciliğinin yaygınlaşması için tüketiminin artması gerçeği göz önüne alındığında, insanların beslenmede bıldırcınları tercih etmelerini sağlayacak unsurlar üzerinde daha kapsamlı çalışmaların yapılması önerilebilir.
Mostrar más [+] Menos [-]Türkiye’de Piyasaya Sunulan Bebek Mamalarında Genetiği Değiştirilmiş Organizma (GDO) Varlığının Araştırılması Texto completo
2021
Erdem Artuvan | Salih Aksay
Biyoteknolojik yöntemlerle canlıların gen dizilimlerinin değiştirilip, mevcut özelliklerinin geliştirilmesi ve/veya yeni özellikler kazandırılması ile elde edilen organizmalara genetiği değiştirilmiş organizma (GDO) denilmektedir. Bebeklerin yaşamlarının ilk ayları boyunca tükettikleri bebek sütleri ve bebek devam sütleri de türevlerine göre soya, mısır, pirinç gibi ürünleri içerebilmektedir. Dünya’da yoğun olarak genetiği değiştirilmiş organizma sınıfında üretilen bu bileşenleri içeren bebek formüllerinde de GDO taraması yapılması gerektiği düşünülmüştür. Bu çalışmada, 2011 yılında Türkiye’de piyasaya sürülen bebek sütlerinde ve bebek devam sütlerinde, kül, % rutubet, toplam yağ, karbonhidrat, protein analizleri ve real time PCR yöntemi ile GDO taraması yapılmıştır. GDO taraması sonucunda p35S, tNOS ve pFMV izgenlerini içeren ürüne rastlanmamıştır.
Mostrar más [+] Menos [-]Evaluation of Antimicrobial Effects of Four Selected Marine Macroalgae from Iskenderun Bay Texto completo
2021
Selin Sayın | Betül Aydın | Burcu Ak Çimen | Leyla Açık
In the present study, the seaweeds belong to Phaeophyaceae (Cystoseira elegans Sauvageau 1912, Cystoseira amentacea (C.Agardh) Bory 1832, Padina crassa Yamada 1931) and Florideophyceae (Corallina elongata J.Ellis & Solander 1786) collected from nearby Iskenderun-Turkey of Mediterranean Sea were detected for their antimicrobial activities against seven bacterial strains (Escherichia coli ATCC 35218, Bacillus cereus NRRL B-371, Staphylococcus aureus ATCC 25923, Pseudomonas aeruginosa ATCC 27853, Klebsiella pneumoniae ATCC 13883, Salmonella typhimurium ATCC 14028, Proteus vulgaris RSKK 96029). The antimicrobial activities were expressed as minimum inhibitory concentrations (MICs) and minimum bactericidal concentrations (MBCs). According to the results obtained from MICs and MBCs values of the extracts on pathogenic microorganisms were between 0.78 to 50 mg/mL. The lowest MICs and MBCs values were recorded for C. elegans extract against B. cereus with a MIC value of 0.78 mg/mL. These results suggest that secondary metabolites of brown and red algae are important sources that could be used as broad spectrum of biological and pharmaceutical activities.
Mostrar más [+] Menos [-]Direct Seeded Rice and its Prospects in Nepal: A Review Texto completo
2021
Amrit Sharma | Shaurav Sharma | Pankaj Kumar Yadav | Bibek Sodari
Direct Seeded Rice (DSR) is an alternative cultivation technique to the conventional Transplanted Rice (TPR). In this method, seeds are directly sown to the field without the necessity of nursery raising and transplanting. DSR can generally be divided into dry-DSR (sowing dry seeds in dry soil), wet-DSR (sowing pre-germinated seeds in moist soil) and water-seeding (sowing dry or pre-germinated seeds in standing water). This helps in saving water alongside the labour and results in early harvest due to quick crop establishment. DSR is proved to be sustainable and eco-friendly since it emits less methane than in TPR. However, there are few constraints associated with DSR such as weed infestation, crop lodging and nutrient loss. If these major issues are fixed, DSR can result in greater economic returns as compared to TPR. In absence of puddling, the soil structure can be maintained which leads to greater yields of succeeding crops. This technique has been successfully practiced in many countries like Srilanka, Malaysia and USA. In developing nations like Nepal, irrigation and labour constraints can be tackled by adopting direct-seeding for rice cultivation.
Mostrar más [+] Menos [-]Development of Mathematical Functions to Predict Deflection of Radial and Bias Tractor Tires on Rigid Surface Texto completo
2021
Firat Komekci | Adnan Degirmencioglu
The objective of this study was to develop mathematical functions to predict deflection for radial and bias tires. In order to develop the models, the data were obtained from the tire manufacturing companies and organized in Excel first and then transferred to Minitab® for stepwise regression analysis. The variables considered in the study were inflation pressure, load and tire width and overall diameter. Tire width (w) and overall diameter (d) was considered in a multiplication form. The tire deflection models in two different form (linear and non-linear) were developed for both, radial and bias tires. The model selection was achieved by three different criteria and % differences between the measured and predicted data. Based on the results of applying model selection criteria, the models for radial and bias tire in non-linear form were found to be adequate for predicting the tire deflection. The results from the stepwise analysis indicated that the load on tire was the predominant variable in the models and made the highest contribution to the prediction functions. The developed models were verified against to published literature data and found a good agreement.
Mostrar más [+] Menos [-]Determination of Antimicrobial and Antioxidant Activity of Alchemilla alpina L. Texto completo
2021
Şule İnci | Ayşe Eren | Sevda Kirbağ
Alchemilla genus, which belongs to the Rosaceae family, is a medicinal plant used for various purposes among the people. Species of this genus are known in Turkish folk medicine as lion claw or hazelnut grass. Especially, they are used mainly women’s illnesses, in gastritis, anti-inflammatory, as carminative, and in the treatment of wound. Besides the antimutagenic effect of Alchemilla alpina L., its above-ground parts are used for antimycotic purposes in the form of tea or oral care water. In this study, it has been aimed to determine the antimicrobial effect of the above-ground parts of Alchemilla alpina extracts obtained from methanol, ethanol and chloroform and the antioxidant activity of different concentrations of the extract obtained from methanol. The antimicrobial activity of methanol, ethanol and chloroform extracts of the above-ground parts of A. alpina has been determined according to disk disc diffusion method. In the results obtained have been showed that these extracts inhibited the growth of some bacteria (Staphylococcus aureus ATCC25923, Escherichia coli ATCC25322, Klebsiella pneumoniae ATCC700603, Bacillus megaterium DSM32) and yeasts (Candida albicans FMC17 and Candida glabrata ATCC66032) at different rates (8-23 mm). The antioxidant activity of different concentrations (1.25, 2.5, 5 and 10 mg/ml) of the above-ground parts of A. alpina extract obtained from methanol has been determined according to the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging capacity method. In the results obtained, it has been observed that the effect of removing DPPH radical of A. alpina increased depending on increasing concentrations.
Mostrar más [+] Menos [-]Trade Effects of Geographical Indications on Turkish Agricultural Products and Foodstuff Texto completo
2021
Burçak Müge Vural
Environmental concerns together with social and ethical issues raise consumers’ interest in sustainable production and consumption practices. With rising trends of fair trade and high popularity of organic and local production in recent years, the demand for geographical indication registration has also increased by agricultural producers as a way of transmitting further information to raise reputation of their products. This research aims to assess the impact of geographical indications on export performance of Turkish agricultural products and foodstuffs. Findings reveal that geographical indications increase export revenues. Results communicate an important message to policy makers to promote the protection of geographical indications.
Mostrar más [+] Menos [-]A Potential Threat for Blackberry, Raspberry and Rosehip Growing in Konya Province: Fire Blight Disease Texto completo
2021
Aysun Öztürk | Kubilay Kurtulus Bastas
In the present study, totally 49 samples, which showed the symptoms of leaf and shoot blight and cankers with brown discoloration of necrotic tissues on mature branches, were collected from 22 districts and areas of Konya Province between 2017 and 2019. Presence rate of E. amylovora in collected samples, showing symptoms of the disease, from the province was determined to be 40% for blackberry and raspberry and 33% rosehip for rosehip in three years. Bacteria consistently isolated from the diseased tissues were identified on the basis of biochemical, physiological, and molecular tests, comparing with a reference strain of E. amylovora, isolated from blackberry (Kbb 371). Twenty seven representative bacterial strains were gram-negative, rod-shaped, mucoid, fermentative, positive for levan formation and acetoin production, no growth at 36°C, positive for gelatin hydrolysis, and negative for esculin hydrolysis, indole, urease, catalase, oxidase, arginine dehydrolase, reduction of nitrate, acid production from lactose, and inositol. All strains induced a hypersensitive response in tobacco (Nicotiana tobacum cv. White Burley) 24 h after inoculation with a 108 CFU ml-1 bacterial suspension in sterile distilled water. The strains were identified as E. amylovora using the species-specific primers set A/B (1), which amplified a 1-kb DNA fragment in PCR, and the matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) method. In order to fulfill the Koch postulates, pathogenicity test was confirmed by injecting bacterial suspensions of 108 CFU ml-1 in sterile distilled water into the shoot tips of 3-year-old blackberry R. fruticosus cv. Chester, raspberry R. idaeus cv. Heritage and rosehip R. canina. All tests were repeated three times. The bacterium was re-isolated from inoculated plants and identified as E. amylovora. Phytosanitary measures are needed to prevent any further spread of the bacterium as potential inoculum sources to new blackberry, raspberry and rosehip growing areas.
Mostrar más [+] Menos [-]Artan Dozlarda Magnezyum Sülfat Uygulamalarının Tütün Bitkisinin Yaprak Verimi ve Kalitesine Etkisi Texto completo
2021
Ahmet Kınay | Halil Erdem
Bu çalışma, Tokat/Erbaa ve Tokat/Kazova lokasyonlarında tarla koşullarında 2017 yılında topraktan artan dozlarda (0, 3, 6 ve 9 kg da-1) MgSO4 uygulamalarının Xanthi 81 tütün çeşidinin yaprak verimi, kalitesi ile yaprağın bazı kimyasal (Mg, S, N, K, P, nikotin, şeker, klorogenik ve rutin konsantrasyonu) içeriklerine etkisi araştırılmıştır. Araştırma tesadüf blokları deneme desenine göre üç tekerrürlü olarak kurulmuş olup, hasat olgunluğuna gelen yapraklar üç elde hasat edilmiştir. Elde edilen sonuçlara göre, artan dozlarda MgSO4 uygulaması ile Erbaa ve Kazova lokasyonlarında yetiştirilen tütün çeşidinin yaprak veriminde artışlar meydana gelmiştir. Yaprak veriminde ortaya çıkan artış en fazla MgSO4’ın 6 kg da-1 dozunda görülmüş ve bu artış Erbaa lokasyonunda %22, Kazova lokasyonunda ise %6,4 düzeyinde olmuştur. Artan MgSO4 uygulamaları ile yaprak Mg ve S konsantrasyonlarında istatiksel olarak önemli artışlara neden olduğu, en fazla artışın yaprak veriminde olduğu gibi MgSO4’ın 6 kg da-1 dozunda olduğu görülmüştür. Tütün için çok önemli bir alkaloid bileşeni olan nikotin konsantrasyonu MgSO4 uygulaması ile her iki lokasyonda da azalmıştır. Sonuçlar, artan dozlarda MgSO4 uygulamalarının tütün yaprağının veriminde artışa neden olduğu, yaprak Mg ve S konsantrasyonlarında artışa, nikotin konsantrasyonlarında ise azalmaya neden olduğu ortaya çıkmıştır.
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