Yazar "Celik S." seçeneğine göre listele

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    Analysis of genetic variability and heritability for seedcotton yield in a single seed decent population
    (Parlar Scientific Publications, 2019) Bardak A.; Hayat K.; Tekerek H.; Parlak D.; Celik S.; Khan R.S.A.; Sever A.C.
    Variation is very important for the plant breeders and selection is effective when magnitude of variability in the breeding population is adequate. Genetic variability and heritability were observed among F2:4 populations of cotton for three seasons. Parents, including G. barbadense (Askabat-100), G. hirsutum (Nazilli84S, Giza45, Albania-6172 and IS-4), and their F 2 4 populations were grown in a randomized complete block design with three replications during 2015. Statistical analysis revealed highly significant differences for all the traits. On average basis, the F2:4 populations showed better performance than parental cultivars for yield and yield components. Additionally, from moderately high to high heritability (broad sense) values (0.61-0.95) were calculated for all parameters in the populations. Yield contributing components specially number of bolls per plant and boll weight directly affected the seed cotton yield in all populations among which Albania6172 x Giza 45 exhibited the highest boll weight. In general, our results revealed that F2:4 populations developed by single seed descent method held not only a larger genetic potential but also a positive association between yield and yield contributing traits. As a whole, it might be interpreted that moderate to high heritability could be used a selective parameter for plant improvement in segregating populations. © by PSP
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    Can exposure to manganese and extremely low freIuency magnetic fields affect some important elements in the rat teeth?
    (2012) Ince B.; Akdag Z.; Bahsi E.; Erdogan S.; Celik S.; Akkus Z.; Dalli M.
    Background: Length and level of exposure to electromagnetic fields (EMFs) is increasing in association with the widespread use of electrical and electronic devices and technological progress. The undesirable effects of extremely low freIuency magnetic fields (ELF-MFs) on health have attracted considerable interest. Materials and Methods: Sixty-four fourmonth- old male Wistar rats divided into eight groups of eight rats each were used. Seven groups were exposed to varying dosages of manganese (Mn) and a 50 Hz magnetic field (MF) of approximately 1 mT, while the last group was set aside as the cage control group and not subjected to any procedure. This study was intended to investigate the interactions between the application of MF and Mn and the elements Ca, Zn, Mg, and P thought to be involved in caries, in rat teeth. Results: Levels of Ca, Mg, Zn, and P in the experimental group rats were different to those in the control group. Conclusions: The results demonstrate that ELFMF and Mn can have significant effects on levels of elements in rat teeth. Further experimental and epidemiological studies of ELF-MF and Mn are needed in order to evaluate their dental effects.
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    Determination of competition capacity of local Karacadag and Osmancik-97 rice variety against some weeds
    (Bangladesh Botanical Society, 2017) Alp A.; Celik S.; Kaya B.
    In the first part the effects of aqueous extracts of leaf, straw, hull and seed of 7 different weed species on germination of local Karacadag and Osmancik-97 rice seeds was investigated. In the second part, Karacadag and Osmancik-97 rice seeds were sown together with weed seeds to plots, and it was determined effects of varied weed species on germination, root, seedling, leaves and grain yield of rice varieties in field conditions. As a result of the findings; aqueous extracts of Echinochloa crus-galli L. Beauv, E. oryzoides(Ard.) Fritsch., Amaranthus retroflexus L. and Physalis peruviana L. were found to be the weeds which inhibit the germination of both rice seeds the most in both laboratory and field conditions.
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    Effect of microwaves on survival of some bacterial strains
    (Akademiai Kiado Rt., 1996) Atmaca S.; Akdag Z.; Dasdag S.; Celik S.
    While the inhibitory effect of microwave radiation on microorganisms is being researched intensively, how microwave radiation brings about this effect has been a matter of discussion. Some researchers support that this effect is of a thermal character, whereas some others maintain a non-thermal effect. In this work, 1 ml suspensions of Pseudomonas aeruginosa, Pseudomonas acidovorans, Staphylococcus aureus and Staphylococcus epidermidis bacteria were subjected to microwave radiation at 2450 MHz and 550 Watts for periods of 5, 6, 7, 8, 10, 12, 14, 16, 18, 20, 25 and 30 seconds. When each result was compared with the CFU/ml results obtained from unradiated control group bacterial suspensions derived from stock cultures, significant conclusions were attained (P<0.001). The same experiments were repeated with the application of conventional heating. The difference between the CFU/ml values of similar bacterial suspensions subjected to microwave radiation and conventional heating was significant (P<0.001). Concurrently, the fact that the effect was exacerbated upon increasing of liquid volume during the application of microwave radiation was established via the results obtained through the application of microwave radiation to 1 ml and 5 ml bacterial suspensions (P<0.001).