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Search Results: 1 - 10 of 191185 matches for " D Kaydan "
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The effects of different sowing depth on grain yield and some grain yield components in wheat (Triticum aestivum L.) cultivars under dryland conditions
M Yagmur, D Kaydan
African Journal of Biotechnology , 2009,
Abstract: and yield components for wheat cultivars during 2004-2006 at one site in Van Province in Eastern Turkey. Grain yield and yield components were found to positively correlate with coleoptile length, with marked declines observed in grain yield and yield components among varieties with shorter coleoptiles in deepest sowing. Wheat sown at 5 cm gave greater yields than wheat sown at 3, 7 and 9 cm by 19.9, 22.3 and 62.5%, respectively. The highest grain yield (2.98 T ha-1) was obtained with the Alparslan cultivar sown at a depth of 5 cm. Grain yield of all varieties tested was drastically reduced when sown at depths of 9 cm, with the exception of the local Tir and Alparslan varieties, both of which, when compared to the other varieties tested, had longer coleoptiles.
xTriticosecale Witm, seed size, drought, germination, seedling growth.
D Kaydan, M Yagmur
African Journal of Biotechnology , 2008,
Abstract: Effect of seed size (small, medium and large) on germination and seedling growth of triticale (xTriticosecale Witm. cv. Presto) at the different osmotic potential of NaCl and PEG solutions were determined in the present study. Germination tests were conducted under five osmotic potential levels (-0.45, -0.77, -1.03, -1.44 MPa, and Control) of PEG 6000 and NaCl. Germination percentage (%) at 4 and 8th days and also seedling growth traits such as root and shoot length (mm), dry root and shoot weight (mg), root : shoot length (R:S) ratio, and relative water content of shoot (RWC, %) were investigated in this study. The results indicated that decreases in the osmotic potentials caused a reduction in germination percentage and seedling growth. It was seen that drought created by PEG 6000 had more negative effects on germination and seedling growth than that of NaCl. In consequence, the total germinability and seedling growth were higher in large seeds rather than in small seeds in control solution and under osmotic stress. In addition, it was observed that seedlings obtained from larger seeds survived even at the lower osmotic potential of PEG and NaCl; whereas, seedling obtained from small seeds did not survive in the intensive stress.
Alleviation of osmotic stress of water and salt in germination and seedling growth of triticale with seed priming treatments
M Yagmur, D Kaydan
African Journal of Biotechnology , 2008,
Abstract: Effects of seed priming treatments with 0.5% KH2PO4 (w/v) solution and water were determined on germination and seedling characters of hexaploid triticale (Triticosecale Witm., cv. Presto) in different osmotic potential of NaCl and PEG solutions. Drought and salt osmotic stress conditions were separately created by using PEG 6000 and NaCl, respectively, at different osmotic potentials (-0.45, - 0.77, -1.03 and -1.44 MPa and control). At the equivalent osmotic potential, the effects of PEG 6000 were more harmful than NaCl on germination and seedling stage. Germination percentage and seedling growth and also relative water content (RWC, %) decreased with the decrease in osmotic potential of PEG 6000 and NaCl. But root-to-shoot length ratios increased with the effects of osmotic stress of PEG 6000 and NaCl. Despite the negative effects of two stress conditions, the two priming treatments were effective in improving germination percentage and seedling growth in Presto. But seed primed treatment was effective at the lowest osmotic potentials; therefore, seedling growth survived at the highest concentrations. Consequently, the effect of hydropriming is very pronounced particularly in improving germination and seedling growth in low stress.
Different Intercrop Arrangements with Lentil and Barley under Dryland Condition
Mehmet Yagmur,Digdem Kaydan
Pakistan Journal of Biological Sciences , 2006,
Abstract: This study was carried out to evaluate the performance of different intercrop arrangements with lentil and barley crops under dryland condition. This experiment was conducted in field conditions in Van, eastern of Turkey (38°-55`N, 2°-05`E, 725 m above sea level) in 2004-2005 in winter growing seasons. In this study, all intercrop arrangements affected on yield and yield components of barley and lentil significantly. Intercrop arrangements reduces all yield components except plant height of lentil. In barley, all intercrop arrangements increased plant height. Separately, mixing intercrop arrangement reduced number of seed per spike and seed weight per spike of barley compared to sole barley. Row cropping arrangement increased number of seed per spike and seed weight per spike of barley. The highest land equivalent ratio for straw was determined by 100% barley + 60% lentil and 100% barley + 40% lentil mixtures with 1.34 and 1.29, respectively. The highest LER for seed was obtained 100% barley + 20% lentil mixtures as 1.20 LER.
Effects of Sowing Densities and Phosphorus Doses on Some Phenologic, Morphologic Characters and Seed Yield of Dry Bean Under Irrigation Condition in Van, Turkey
Mehmet Yagmur,Digdem Kaydan
Pakistan Journal of Biological Sciences , 2004,
Abstract: In this research, dry bean variety Seker (Phaseolus vulgaris Var volubilis Dekapr.) were grown with three different sowing densities, (25, 37.5 and 50 seeds m-2 ) and five different phosphorus doses (0, 15, 30, 45 and 60 kg P2O5 ha-1) to determine the most suitable sowing density and phosphorus doses for the cultivar in terms of phenologic, morphologic and seed yield in Van Turkey in 1997 and 1998 years. As the sowing density increased, as plant characters such as days to flowering, days to maturity, seed yield, first pods height and plant height increased in dry bean cultivar. Whereas numbers of branching showed reduction. Seed yield and number of branches were increased by increasing phosphorus doses. But days to flowering and days to maturity were decreased by phosphorus doses. The highest seed yield was obtained from 50 seed m-2 +60 kg P2O5 ha with 1920.0 kg ha-1 in 1997 and in second year the highest seed yield was obtained from applications of 37.5 seed m-2 +45 kg P2O5 ha-1 with 1701.0 kg ha-1. The lowest seed yields were obtained from application of 25 seed m-2 +0 kg P2O5 ha-1 with, respectively 1457.5 and 1262.5 kg ha-1 in both years.
Variations in Seedling Characters of Some Wheat and Barley Genotypes During Germination
Di dem Kaydan,Mehmet Ya mur
Pakistan Journal of Biological Sciences , 2005,
Abstract: This laboratory study was conducted in Van, Turkey to determine an evaluation of seedling characters of six wheat and eight barley genotypes during germination. The experimental design was a Randomized Complete Block with four replications. Both barley and wheat varieties of the seed were germinated 98-100% at 4th day during germination. Similar findings were obtained at 8th days. Barley cultivars having high seed test weight gave strong shoot and root in this experiment. First marked things in results of study, homebred mixed population line Tir gave the longest coleoptile length with 5.21 cm at 8th day during germination. This variety is favourable cultivar for deep planting as this study results.
Use of molecular tools for the identification of males of some scale insects (Hemiptera: Coccoidea), in pheromone traps used for monitoring and comparison with females
István Tóbiás,Ferenc Kozár,Bora. M. Kaydan,Kinga Fetykó
Journal of Entomological and Acarological Research , 2010, DOI: 10.4081/jear.2010.e16
Abstract: Species from Pseudococcidae family were studied. It was determined that the dry males of Planococcus citri, and Pseudococcus comstocki, collected by pheromone traps could be useful for the molecular analyses too. The ITS-2 sequences of males and females in case of Pl.citri, Planococcus ficus and Ps. comstocki were identical. This molecular method could differentiate the two mealybug species and this method can be useful to have idea specimens collected by pheromone traps.
Electrical Conductivity of Collapsed Multilayer Graphene Tubes  [PDF]
D. Mendoza
World Journal of Nano Science and Engineering (WJNSE) , 2012, DOI: 10.4236/wjnse.2012.22009
Abstract: Synthesis of multilayer graphene on copper wires by a chemical vapor deposition method is reported. After copper etching, the multilayer tube collapses forming stripes of graphitic films, their electrical conductance as a function of temperature indicate a semiconductor-like behavior. Using the multilayer graphene stripes, a cross junction is built and owing to its electrical behavior we propose that a tunneling process exists in the device.
Porous Carbon Grown by Chemical Vapor Deposition on Copper Substrates  [PDF]
D. Mendoza
Journal of Materials Science and Chemical Engineering (MSCE) , 2015, DOI: 10.4236/msce.2015.38003
Abstract: Amorphous porous carbon was synthesized by chemical vapor deposition on copper substrates. The average size of the pores is around 1.2 microns with some small pores decorating the big ones. Lamellar samples of this carbonaceous material can be separated from the copper support and may be useful as electrode due to its low electrical resistivity of the order of 0.4 Ωcm.
Application of Enzyme Extracted from Aloe vera Plant in Chemical Pretreatment of Cotton Knitted Textile to Reduce Pollution Load  [PDF]
D. Jothi
World Journal of Engineering and Technology (WJET) , 2015, DOI: 10.4236/wjet.2015.33B007

Nowadays, highly alkaline chemicals like caustic soda, soda ash, silicate, acetic acid and soaping agents are used for scouring to remove the non-cellulosic impurities from the cotton. Using 30 - 40 gm/Kg on weight of the fabric results in destruction of cotton structure. Intensive rinsing and more acid is needed for reutilization of cotton, which enlarges the volume of effluent. Furthermore, these hazards chemicals result in increase in COD, BOD and TDS in waste water. These chemicals also attack the cellulose leading to heavy strength loss and weight loss in the fabric. The net result is low quality control and polluted environment with high usage of energy, time, chemical and water. Aloe vera presents the finest commercial opportunity in various industrial sectors among the various plants. Also, most of the countries are gifted with the unique geographical features that are essential for cultivation of Aloe vera. Yet, none of the country has realized and reaped the full potential of such plants in various industrial applications. The reason is simple: lack of the requisite expertise in extraction of various enzymes present in aloe plant. Fortunately, the technology is now accessible to make use of enzyme in textile application. In this research an attempt has been made to make use of lipase enzyme extracted from aloe plant in textile chemical pre- treatment process. In the present research work, an attempt was made to develop bio scouring of 100% cotton knitted fabric with lipase enzyme extracted from Aloe deberena plant at various concentration (1%, 2% and 3%) at various temperature (40?C, 60?C and 70?C) for a period of 30 minutes, 60 minutes and 90 minutes. The properties of bio scoured fabrics are compared with these of conventional scoured one. Encouraging results in terms of dye uptake, dye levelness, wash fastness, light fastness and rubbing fastness are obtained in case of bio scouring fabric dyed with dark reactive colors. Further, it reduces volume of effluent as well as COD, TDS and pH. It saves a substantial thermal energy 50% and electrical energy 40%. Bio scouring waste water has 40% - 50% less COD and 60% less TDS as compared to conventional scouring waste water.

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