No abstract

Karathane LC (active ingredient dinocap), a contact fungicide and a non-systemic acaricide was investigated for its ability to induce chromosome aberrations (CAs) and sister chromatid exchanges (SCEs) in cultured human lymphocytes of peripheral blood. In addition to the cytogenetic analysis, the effect of karathane LC on the cell proliferation kinetics (CPK) by the replication index (RI) was studied. The mitotic index (MI) was also determined to detect the cytotoxic effect. Lymphocytes were treated with four different concentrations (5, 10, 15 and 20 microg/ml) of karathane LC for 24 and 48 h. Significant differences between exposed and non-exposed groups found in CAs, SCEs and MI demonstrate the mutagenic, clastogenic and also the cytotoxic effect of karathane LC.

In this paper, we have investigated the chaotic structure of two different nonlinear circuits by a statistical approach and compared the results of analyses for these systems. We have utilized time history technique to identify the dynamic system. According to the results of the analysis using the BDS test, it has been found that each time series data belonging to circuits indicate chaotic behavior in some cases.

Dynamics of a magnetoelastic beam in a periodic magnetic field is investigated. For this aim, a new measurement tool for the observation of vibrations of the beam is introduced in place of Using common strain-gauge technique. Several analyses including power spectra, maximal Lyapunov exponent, correlation dimension and time series clustering are carried out to determine vibrational aspects of the system. As a result of these analyses, it is found that the system extremely depends on the frequency of external field, even, the nonlinear character of the motion exhibits more complexity for the odd excitation frequencies.

Bu çalışmada, Marmara Bölgesi'nde (39.50 0-41.50 0) kuzey-(26.00 0-32.50 0) doğu koordinatları arasında, 1900-2000 yılları arasında meydana gelen 447 deprem verisi için bazı istatistiksel analizler yapılmıştır. Magnitüd rastgele değişkeninin olasılık yoğunluk ve dağılım fonksiyonları bulunarak, çeşitli magnütüdler için depremlerin tekrarlanma yılları elde edilmiştir.