Refinar búsqueda
Resultados 381-390 de 392
Tarım Alanlarından İzole Edilen Mikrofungusların Benomil Duyarlılıklarının Belirlenmesi Texto completo
2017
Fatih Kalyoncu | Azize Özer
Bu çalışmada, farklı tarımsal ürünlerin yetiştirildiği alanlardan izole edilen mikrofungusların tarımsal üretimde sık kullanılan bir fungisit olan benomile karşı duyarlılık/dirençlilik durumları ortaya çıkarılmaya çalışılmıştır. Bu amaçla mikrofungus izolatları katı besiyeri ortamında benomile direnç yönünden taranmış, dirençli olduğu görülen izolatlar sıvı besiyerine alınarak gelişimlerinin hangi oranlarda engellendiği anlaşılmaya çalışılmıştır. Çalışma kapsamında izole edilen 183 mikrofungus izolatından 23 tanesinin benomile direnç gösterdiği saptanmıştır. Benomilin bu dirençli türlerin gelişimini engelleme oranının %19 ile %66 arasında olduğu tespit edilmiştir.
Mostrar más [+] Menos [-]The Relationship Between Sweeteners and Metabolic Diseases Texto completo
2017
Nildem Kızılaslan
Sweeteners that sugar substitute is a food additive that provides a sweet taste like that of sugar while containing significantly less food energy. Some sugar substitutes are produced by nature, and others produced synthetically. Sweeteners can be classified as sugar alcohols (polyols), artificial sweeteners and natural sweeteners. The need to avoid the adverse effects of sugar cannot stop feeling the taste on humans has resulted in intense use of sweeteners nowadays. There are positive and negative opinions about the effects of their use on human health. The general tendency of food producers is to reduce the amount of sugar in the groats due to negative effects in parallel. Food sweeteners are intended for a large group of consumers, and one of the main points of the sector operators is to provide healthier, natural, nutritional and low calorie sweeteners to these consumers. In this study, we evaluated the sweeteners which are most commonly used. Many studies have been done to demonstrate the safety of sweeteners. There are also studies showing that there may be side effects even if there are few. Some sweeteners have been associated with a number of symptoms. There is a need for comparative long-term work in this area.
Mostrar más [+] Menos [-]Late Blight of Potato (Phytophthora infestans) I: Fungicides Application and Associated Challenges Texto completo
2017
Abdul Majeed | Zahir Muhammad | Zabeeh Ullah | Rafi Ullah | Habib Ahmad
Potato (Solanum tuberosum L.) has been remained an important agricultural crop in resolving global food issues through decades. The crop has experienced enormous growth in terms of production throughout the world in recent decades because of improvement in agricultural mechanization, fertilizers application and irrigation practices. Nevertheless, a significant proportion of this valuable crop is still vulnerable to losses due to prevalence of different viral, bacterial, fungal and nematodes infestations. Late blight, caused by Phytophthora infestans (Mont.) de Bary, is one of the most threatening pathogenic diseases which not only results in direct crop losses but also cause farmers to embrace huge monetary expenses for disease control and preventive measures. The disease is well known for notorious ‘Irish Famine’ which resulted in drop of Irish population by more than 20% as result of hunger and potato starvation. Globally, annual losses of crop and money spend on fungicides for late blight control exceeds one trillion US dollars. This paper reviews the significance of late blight of potato and controlling strategies adopted for minimizing yield losses incurred by this disease by the use of synthetic fungicides. Advantages and disadvantages of fungicides application are discussed.
Mostrar más [+] Menos [-]Probiotic Lactococcus lactis: A Review Texto completo
2017
Priti Khemariya | Sudhir Singh | Gopal Nath | Anil K Gulati
Lactococcus lactis plays a critical role in food, dairy and health sectors. In food and dairy industries, it is found in production processes of various fermented products such as sausages, pickled vegetables, beverages such as beer and wine, breads, soymilk kefir, sour milk, butter, cream, fresh cheese and different types of cheeses, like Cheddar, Colby, Cottage cheese, Camembert, cream cheese, Roquefort and Brie. Additionally, there is an increasing interest towards the possible health benefits of the probiotic activity of this organism which generally is species and strain specific and depends upon the survival in gastrointestinal tract with sufficient number. Certain strains have the ability to produce antimicrobial peptide called nisin which exhibits preservative potential. Therefore, application of bacteriocinogenic Lactococcus lactis in food and dairy sectors to preserve foods as a natural way and contributing health promoting attributes due to probiotic activity would definitely fulfil today’s consumer demands. This paper aimed to review the adaptation, antibiotic resistance, therapeutic and preservation potential of bacteriocinogenic and probiotic Lactococcus lactis.
Mostrar más [+] Menos [-]Impact of Brewery Waste Sludge on Sorghum (Sorghum bicolor L. Moench) Productivity and Soil Fertility in Harari Regional State, Eastern Ethiopia Texto completo
2017
Nano Alemu Daba | Abduletif Ahmed | Muktar Mohammed
The study was conducted on farmers' field in sofi district of Harari Regional State during 2013/2014 main cropping season, eastern Ethiopia, to investigate the impact of brewery sludge on sorghum production and soil fertility. The treatments comprised seven levels of brewery sludges (0, 2.5, 5.0, 7.5, 10.0, 12.5 and 15.0 t ha-1) and NP inorganic fertilizer at recommended rate, arranged in randomized complete block design with four replications. Application of brewery sludge at 15 t ha-1 significantly increased the yield and biomass yield of sorghum by 79 and 85% over control and by 57 and 67% over NP application, respectively. There was no effect of brewery sludge application on heavy metals concentrations in soil after crop harvest, compared to international standard tolerable level. Co and Se levels were high in the control as well as in the soils treated with brewery sludge indicating the already high concentration of these heavy metals in the soils of the area. Plots, which received higher brewery sludge application, resulted in decreased or less percentage of grain nitrogen content showing the independence of grain protein content on lower brewery sludge level. The nitrogen uptake by sorghum grain, straw and the total was maximum (52.68, 44.25 and 79.03 kg ha-1, respectively) with the application of brewery waste sludge at 10 and 15 t ha-1 which were significantly higher than the other brewery sludge and NP mineral fertilizer applications.
Mostrar más [+] Menos [-]Çizgili Sırtlanların (Hyaena hyaena) Hatay ve Şanlıurfa’daki Durumu Texto completo
2017
Erol Atay | Ahmet Kasapoğlu | İsmail Turan Çetin
Bu çalışmada, Türkiye'de yaklaşık 600 km2'lik alanda 18 ay süresince uygulanan yerli halkla yüz yüze görüşmeler, anket ve foto kapanların yerleştirilmesini içeren bir araştırma gerçekleştirilmiştir. Sahada yapılan anketler ve foto kapan çalışmaları, çizgili sırtlanların Hatay ile Suriye sınırı civarında ve Şanlıurfa’da güçlü şekilde yaşadıkları konusunda belirgin kanıtlarla sonuçlandı. Ancak, bu bölgede çizgili sırtlanların durumu hakkında kapsamlı bir çalışma yapılmamıştır. Elde edilen sonuçlarımız çizgili sırtlanın sıklıkla çorak arazide ve Hatay ilinde tavuk çiftliği etrafında görüldüğünü göstermiştir. Alternatif olarak, Şanlıurfa İli'nde küçük gruplar halinde yaşıyorlar. Çizgili sırtlanlara uygun birkaç mağara, bu mağaralarda ve sonrasında gözlemlenen ayak izleri, dışkılar ve diğer hayvan kalıntıları ile tespit edilmiştir. Çizgili sırtlanlara uygun birkaç mağara ve sonrasında yapılan gözlemlerde ayak izleri, dışkılar ve diğer hayvan kalıntıları tespit edilmiştir. Saç, kulak ve karkas dokularından izole edilen Cytb mitokondrial DNA'yı kullanarak, çizgili sırtlanların moleküler karakterizasyonunu Türkiye'de ilk defa gerçekleştirdik. Türkiye'den 10 farklı çizgili sırtlan örneğinden Cytb DNA sekanslarının dizilerinin birbirlerinin özdeşi oldukları bulunmuştur. Tarih öncesi olanlar da dahil olmak üzere daha önce rapor edilen Cytb dizilerin karşılaştırılması sonucu Ctyb geninin Hyaena hyaena türleri arasında oldukça muhafaza edildiğini göstermiştir. Arazi çalışması sırasında, yoğun tarım alanları, yerleşimler ve taş ocakları nedeniyle incelenen bölgelerde habitat tahribatının ve parçalanmanın yüksek düzeyde olduğu gözlemlenmiştir. Hatay ve Şanlıurfa illerinde, yasadışı avlanma, çobanlar tarafından sıklıkla mağaranın kullanımı, yaygın kirpi avlanması, zeytinyağı üretim tesislerinden gelen su kirliliği ve karayolu kazaları çizgili sırtlan nüfusunu olumsuz etkilemektedir. Çizgili sırtlanların yaşam alanını korumak için kapsamlı bir çalışma ve koruma planının uygulanması gerektiği sonucuna varılmıştır.
Mostrar más [+] Menos [-]Relationship between Soil Properties and Plant Diversity in Semiarid Grassland Texto completo
2017
Melda Dölarslan | Ebru Gül | Sabit Erşahin
In ecological studies, soil-plant interaction is an important environmental factor. Soil chemical and physical properties affect plant richness and diversity. This study was carried out to investigate the relationship between soil physical and chemical properties, and plant diversity indexes (Shannon-Weiner and Simpson) in semiarid grassland. Plant diversity indexes and soil properties were determined using 34 quadrats (5x5m) on different parent materials (chrome, marble, serpentine, red chalk and red chalk mostra) in semiarid grasslands in the Central Anatolia Region in Turkey. Plant samples were collected and recorded periodically from April to September (the vegetation period) in 2014 for each quadrat. In order to determine the plant richness and diversity indexes, 3 sub-quadrats (1x1m) were randomly added into each of 34 (5x5 m) quadrats. To evaluate the relationship between plant diversity indexes and soil properties, composite soil samples were collected from the four corners, and the center of each quadrat 0-30 cm in depth, and which was mixing of those subsamples. Soil sand-silt-clay contents, soil reaction (pH), bulk density (BD), electrical conductivity (EC), CaCO3 and soil organic matter (SOM) contents were measured. Relationship between plant diversity indexes measured in different months during vegetation period and soil properties of different parent material was statistically analysed using correlation analysis in SPSS 20.0. Modest correlation coefficient was found between the Simpson diversity index and SOM content, sand-silt-clay content, pH and EC for different months in vegetation period.
Mostrar más [+] Menos [-]Suitibility of Hair Goat Breeding with regards to Organic Production Texto completo
2017
Mahmut Keskin | Sabri Gül | Osman Biçer | Zuhal Gündüz
Although the intensification of agricultural production is the reason for feeding of increasing human population the demand for organic or ecological products is increasing in parallel with the social consciousness in recent years. Hair goat breeding is made in a large part of Turkey that is suitable or may become suitable for organic production system with a few arrangements. In this study, Hair goat breeding was evaluated together with the Regulation on the Principles and Implementation of Organic Agriculture. The study is important in terms of ensuring sustainability of hair goats under the threat of crossbreeding by assessing it within organic production.
Mostrar más [+] Menos [-]Identification of Meat Species by Using Molecular and Spectroscopic Techniques Texto completo
2017
Evrim Güneş Altuntaş | Ebru Deniz | Beycan Ayhan | Kezban Candogan | Duygu Ozel Demiralp
Meat is one of the main nutrition source in the human diet with its excellent protein, vitamin and mineral contents. Despite its advantages, being high-priced makes meat products open to adulteration. Meat products are mixed food types which can contain different species of meat. However, mixing two or more types of meats is not always allowed by laws. On the other hand, replacement high quality meats with cheaper meat types are a cost lowering way for the producers. The commonly consumed meat types differ from country to country, but generally economical, ethnic and religion concerns are in the foreground. In this case, species identification techniques are gaining importance. Although some techniques depending on DNA or spectroscopy have been developed for many years, choosing the best method for species identification is still among the controversial issues today. Thus, the currently used methods and promising techniques in this area were discussed in this review.
Mostrar más [+] Menos [-]Determination of Antimicrobial Effects of Probiotic Lactic Acid Bacteria and Garlic Extract Against Some Foodborn Pathogenic Bacteria Texto completo
2017
Selin Kalkan | Elçin Taş | Zerrin Erginkaya | Emel Ünal Turhan
In this study, it was investigated that the inhibition effect of some lactic acid bacteria (Lactobacillus acidophilus NCC68, Lactobacillus casei Shirota, Lactobacillus rhamnosus (Ezal, commercial starter cultures)) which possessed with probiotic characteristics, against Bacillus cereus, Salmonella Enteritidis, Escherichia coli, Escherichia coli 0157:H7 ATCC 35150 and Staphylococcus aureus ATCC 25923. Besides, the inhibitory effect of probiotic cultures which used with meat and meat product additives that garlic extract over the antagonistic effects of sensitive pathogens were investigated in vitro. Consequently, the whole of lactic acid bacteria and garlic extract which were used in this study, showed inhibition effects against all selected pathogenic bacteria. Staphylococcus aureus ATCC 25923 was determined as the most sensitive pathogenic bacteria while Bacillus cereus was the most resistant bacteria against lactic acid bacteria and garlic extract. There was a distinctive increase in inhibition effects were observed by used of a combination with lactic acid bacteria and garlic extract.
Mostrar más [+] Menos [-]