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Search Results: 1 - 10 of 768 matches for " Bilal Keskin "
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Yield and Metal Concentration in Garden burnet (Sanguisorba minor Scop. Bunyan 80) from Application of Sewage Sludge and Chemical Fertilizer
Hakki Akdeniz,Bilal Keskin,Mehmet Ali Bozkurt
Journal of Animal and Veterinary Advances , 2012,
Abstract: The objective of this study, was to evaluate the effects of sewage sludge applications on herbage yield, grain yield, nutrients and heavy metal accumulations on Garden burnet (Sangiusorba minor Scop. Bunyan 80). The study was conducted in 2004 and 2007 years at the fields of Agricultural Faculty in Yuzuncu Yil University. The experiment was a randomized complete block design, with 4 replications for 4 years. Three levels of sewage sludge were applied at rates 0.7, 1.4 and 2.1 ton day-1; 3 levels of nitrogen were also applied at rates of 5, 10 and 15 kg day-1 with control. The research demonstrated that sewage sludge produced higher herbage yield than the chemical fertilizer, however equivalent to the chemical fertilizer in grain yields of the garden burnet. Plant tissue N, P, K, Mg, Fe, Cu, Zn and Pb contents varied with treatments. The highest plant-N was obtained from chemical fertilized plots. Results showed that sewage sludge applications increased extractable metal concentrations of Fe, Zn and Cr of the soil. None of the amendments produced excessive levels of the nutrients and heavy metals; rather the amendments improved the feed quality of the forage.
The Effects of Sewage Sludge and Nitrogen Fertilizer Application on Nutrient and (Bromus inermis Leyss.)
Bilal Keskin,Mehmet Ali Bozkurt,Hakki Akdeniz
Journal of Animal and Veterinary Advances , 2012, DOI: 10.3923/javaa.2010.896.902
Abstract: In order to evaluate the growth of smooth bromegrass, nutrient and heavy metal accumulation of plant tissue and heavy metal accumulation in soil, this research was conducted. The study included seven treatment: a zero-N (control), three inorganic nitrogen fertilizer rates (50, 100 and 150 kg ha-1) and three sewage sludge rates (7.0, 14.0 and 21.0 Mg ha-1). Sewage sludge and N fertilizer increased dry matter yield and N, K, Cu, Zn, Pb, Cr, Cd contents of smooth bromegrass. The highest dry matter yield obtained at the highest sewage sludge (21.0 Mg ha-1) and the highest N fertilizer (150 kg N ha-1). Applications did not effect P, Cu, Mg, Cr (only 2005 year), Fe and Mn contents of plant tissue. At the end of research (2006 year), soil samples for Fe, Mn, Zn, Cu, Pb and Cd analysis were collected in three soil depth (0-20, 20-40 and 40-60 cm) for all application. N fertilizer and sewage sludge application had no effect in 20-40 and 40-60 cm soil depth for all analysed elements. Applications had very effect in only 0-20 cm soil depth (on surface soil). Compared to control plots, sewage sludge increased DTPA-extractable Fe, Mn, Zn, Cu, Pb and Cd contents of soil.
Determination of Some Yield Characters of Grain Corn in Eastern Anatolia Region of Turkey
Bilal Keskin,Ibrahim H. Yilmaz,Osmetullah Arvas
Journal of Agronomy , 2005,
Abstract: This study was conducted in Van, located in Eastern Anatolia Region of Turkey, in 2000 and 2001 year to determine some yield characters of grain corn cultivars. In the experiment eleven (C-955, DK-626, Antbey, LG-60, Flash, LG-55, TTM-8119, Vero, TTM-813, Ant-90 and Akp nar) corn cultivars were used and experimental design was Randomized Complete Block. Corn cultivars had the lowest 711.2 kg da-1 and the highest 1062.5 kg da-1 grain yield. DK-626 (1062.5 kg da-1), LG-55 (1027.4 kg da-1) and C-955 (1005.4 kg da-1) cultivars produced the highest grain yield had better performance while TTM-8119 and Vero cultivars having the lowest grain yield. Grain yield of corn cultivars in van were found sufficient compare to other region of Turkey. So, Van region can be a new corn grain production area in future.
Yield Properties of Some Alfalfa Cultivars in East Anatolia Region of Turkey
Bilal Keskin,Ibrahim H. Yilmaz,Seyda Zorer,Osmetullah Arvas
Research Journal of Biological Sciences , 2012,
Abstract: This research was conducted in Van located Eastern Anatolia Region of Turkey for 3 years from 2001-2003. In the research, twelve alfalfa cultivars (Bilensoy, Elci, Kayseri, MA-324, Prosementi, Desica, MA-414, Gara, Prista, Hemedan, P-5693 and MA-525) were used as treatment material. Experimental design was completely block with three replication. As a result of experiment, Bilensoy, Desica, Elci, MA-414, MA-324 and MA-525 cultivars produced more forage and crude protein yield compared to the other six alfalfa cultivars. Clearly, the results indicated that Bilensoy and Desica cultivars had the highest crude protein rate and crude protein yield; therefore, they seemed more promising in forage production in the area.
Sewage Sludge as Nitrogen Source for Irrigated Silage Sorghum
Bilal Keskin,Ibrahim Hakki Yilmaz,Mehmet Ali Bozkurt,Hakki Akdeniz
Journal of Animal and Veterinary Advances , 2012,
Abstract: Field experiment was conducted in clay loam soil in Van, located in the eastern part of Turkey, to study sewage sludge and ammonium sulphate as nitrogen sources for sorghum. Silage and dry matter yield, plant height, stem, leaf and panicle ratio, plant nitrogen content, total N uptake, leaf nutrient and heavy metal content, soil DTPA-extractable nutrient and heavy metal content were quantified. The experimental design was a randomized complete block with four replications. Two rates of ammonium sulphate (50, 100 kg ha-1) and three rates of sewage sludge (5.95, 11.90 and 23.80 Mg ha-1) were applied to plots. Sorghum plant was irrigated once a week until soil water content reached to field capacity. Silage and dry matter yield, plant height and total N uptake increased with application of chemical N fertilizer and sewage sludge as compared to control. The yield results revealed that, 100 kg ha-1 nitrogen rate and 23.80 Mg ha-1 sewage sludge rate caused to produce almost the same amount of silage and dry matter yield. Leaf N, P, Ca, Mg, Fe and Mn content of sorghum increased with application of N fertilizer and sewage sludge. Mentioned nutrients in leaf were found pretty similar with application of 100 kg ha-1 N rate and 23.80 Mg ha-1 sludge rate. Besides, Potassium content of sorghum leaf was not affected by either treatment. Leaf Zn content increased with application of N fertilizer and sewage sludge and it reached the highest level at 23.80 Mg ha-1 sludge rate. Leaf Cu content increased only with application of sewage sludge. Also, Fe, Zn, Cu and Ni contents in experiment soil increased with application of sewage sludge and their levels reached to the highest at 23.80 Mg ha-1 sludge rate. None of heavy metal reached toxic level either in plant or in soil. Results indicated that sewage sludge, produced in Van region, could be used as a fertilizer nitrogen source for sorghum, without risks associated with toxic heavy metals.
Yield and Quality of Forage Corn (Zea mays L.) as Influenced by Cultivar and Nitrogen Rate
Bilal Keskin,Hakki Akdeniz,Ibrahim Hakki Yilmaz,Nizamettin Turan
Journal of Agronomy , 2005,
Abstract: The objective of this study was to evaluate the effects of different nitrogen doses on agronomics traits of four corn cultivars (P-3335, P-3394, Arifiye and Frassino). The study was conducted in 1999 and 2000 years at the field of Van Agricultural High School. The experiment was a split plot with three replications. Main plots were assigned to nitrogen levels (0, 80, 160 and 240 kg ha-1) and sub-plots were assigned to corn cultivars. In the study, considerable differences were found among both nitrogen levels and corn cultivars. In general, green herbage yield, dry matter yield, crude protein rate, crude protein yield, leaf ratio, ear ratio, ear number per plant, plant height and plant weight increased, but stem ratio decreased with increasing nitrogen level. However, there was no significant difference between 160 and 240 kg ha-1 nitrogen applications when green herbage yields and traits that affect silage quality are considered. Therefore, optimum rate of nitrogen was 160 kg ha-1. Also, Frassino was determined the best cultivars for silage production in Van region because of its high green herbage, dry matter and ear production.
Randomized clinical trial of Stapled hemorrhoidopexy versus Ferguson hemorrhoidectomy
Oktay Büyüka??k,Ahmet O?uz Hasdemir,A ?lker Keskin,Bilal Ar?kan
Medical Journal of Bakirk?y , 2008,
Abstract: Objective: The purpose of this study was to compare stapled hemorrhoidopexy (SH) with that of the Ferguson hemorrhoidectomy (FH) for the surgical treatment of hemorrhoidal disease. Material and Methods: Fifthy patients with grade III or IV haemorrhoids were randomized to undergo either the SH (n=25) or FH (n=25). Operative time, length of hospital stay, postoperative pain, early and late complications, time to return to normal daily activities (both professional and social) and recurrence were evaluated. Follow up was one year. Results: Operative time, postoperative pain, the time to return to normal activities and recurrence were significantly less for patients in SH group. In the FH group early complications were more frequent but not statistically significant and there were no statistically significant differences regarding the frequency of late complications. Conclusion: Provided further clinical trials confirm these findings, SH may become a future gold standard.
Time-seismicity evolution and seismic risk assessment of the Arabian plate  [PDF]
Ahmad Bilal
Natural Science (NS) , 2013, DOI: 10.4236/ns.2013.59126

The seismicity of the Arabian plate, which is the aim of this paper, is controlled by the ZagrosTaurus collision zone in the North, the Indian expansion zone and the Arab golf in the South and the East, the Dead Sea Fault, the North continuity of the Red Sea, and the Syrian rift, which links the rigid Arabian plate to the mobile ophiolite belt of Cyprus-Southern Turkey in the West. These major elements with their related fracture system, make the Arabian plate an important seismic centre. To attain our purpose, a variable methodology is used in: measurements of movement rate-displacement in the field, the analysis of historical and recent seismic data, and physical effects on the structures. The movement rate-displacement, calculated in the field by different specialists, varies from 2 to 6 mm/year. This rate increases from 2 - 3 mm/year in the North, to 6 mm in the South. These estimations are confirmed by historical seismic data, the recent seismic recorded by the Arab seismic centers, and physical effects on the building structures in the region. The analysis of historical and recent seismic data recorded in the seismic centre show that the seismicity in this plate, tend to fade out with time. This result is in agreement with recent estimations on the movement rate, and in line with the decrease of major seismic intensity, which has occurred during the last millennium. A conclusion of time-evolution seismicity is traced, and a seismic zoning map, for the Arabian plate, using movement rate, seismic data, and tectono-geodynamic analysis, is proposed.

Arab metallurgy owes much to meteorites iron—A special regard to Damask saber  [PDF]
Ahmad Bilal
Natural Science (NS) , 2014, DOI: 10.4236/ns.2014.62012

Ancient Arabs have recognized metallic and mineral ores, including their fluid inclusions which were still considered as a new scientific fields in the 70’s last century. They discovered metallic ores (gold, silver, copper), in inhabited areas and in delta and river crosses, using different techniques for exploration and exploitation. Metallic industry flourished during the Islamic period, silver and gold were used as currency for commercial exchanges. Meteorites were also recognized by Ancient Arabs. They collected them in the deserted areas, and used them for arms manufacturing, as sabers and daggers. The more famous of these arms is the Damask saber steel, known reputedly Jaohar. It has an extraordinary mechanical properties, and exceptional sharp cutting edge. The Jaohar blades were forged directly from fall meteorites, at temperature of 80℃, using a sophistical thermomechanical of forging, annealing to refine the steel, and giving it this exceptional quality and superelastic behavior. Meteorites using by Ancient Arabs come back to 400 years ago, as confirmed by a recent research on two meteorites samples, presented in Aleppo museum, found in Ras Shamra, and Umm El Maraa, in Syria.

Binding induced conformational changes of proteins correlate with their intrinsic fluctuations: a case study of antibodies
Ozlem Keskin
BMC Structural Biology , 2007, DOI: 10.1186/1472-6807-7-31
Abstract: Here, two antibodies, a germline antibody of 36–65 Fab and a monoclonal antibody, SPE7 are studied in detail to elucidate the mechanism of antibody-antigen recognition and to understand how a single antibody recognizes different antigens. An elastic network model, Anisotropic Network Model (ANM) is used in the calculations. Pre-existing equilibrium is not restricted to apply to antibodies. Intrinsic fluctuations of eight proteins, from different classes of proteins, such as enzymes, binding and transport proteins are investigated to test the suitability of the method. The intrinsic fluctuations are compared with the experimentally observed ligand induced conformational changes of these proteins. The results show that the intrinsic fluctuations obtained by theoretical methods correlate with structural changes observed when a ligand is bound to the protein. The decomposition of the total fluctuations serves to identify the different individual modes of motion, ranging from the most cooperative ones involving the overall structure, to the most localized ones.Results suggest that the pre-equilibrium concept holds for antibodies and the promiscuity of antibodies can also be explained this hypothesis: a limited number of conformational states driven by intrinsic motions of an antibody might be adequate to bind to different antigens.Motions induced by protein-ligand interactions are controlled by the global motions of the proteins, including enzymes and antibody-antigens [1-12]. Elucidation of the mechanisms by which the proteins bind to each other or to ligands is of great importance to control and alter protein associations. Several different models have attempted to explain protein binding mechanisms. The specific action of an enzyme with a single substrate was first explained by the lock and key analogy postulated in the nineteenth century. In this analogy, the lock is the enzyme and the key is the substrate. Only the correctly sized key (substrate) fits into the key h
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