Geostatistical Approach for Spatial Interpolation of Meteorological Data

ABSTRACT Meteorological data are used in many studies, especially in planning, disaster management, water resources management, hydrology, agriculture and environment. Analyzing changes in meteorological variables is very important to understand a climate system and minimize the adverse effects of the climate changes. One of the main issues in meteorological analysis is the interpolation of spatial data. In recent years, with the developments in Geographical Information System (GIS) technology, the statistical methods have been integrated with GIS and geostatistical methods have constituted a strong alternative to deterministic methods in the interpolation and analysis of the spatial data. In this study; spatial distribution of precipitation and temperature of the Aegean Region in Turkey for years 1975, 1980, 1985, 1990, 1995, 2000, 2005 and 2010 were obtained by the Ordinary Kriging method which is one of the geostatistical interpolation methods, the changes realized in 5-year periods were determined and the results were statistically examined using cell and multivariate statistics. The results of this study show that it is necessary to pay attention to climate change in the precipitation regime of the Aegean Region. This study also demonstrates the usefulness of the geostatistical approach in meteorological studies

Effect of aerial part and root extracts from Ferulago mughlae Pesmen and Ferulago sandrasica Pesmen & Quezel growing in Turkey on erectile dysfunction in streptozotocin-induced diabetic rats

WOS: 000459615300010Ferulago species have been utilised since ancient times as antihelmentic, peptic, sedative and aphrodisiac, and as the seasoning in view of their special odors. In Turkish traditional medicine, the roots from some members of this genus are utilized as aphrodisiac, so we determined to show in vitro relaxant effect of F. mughlae Pesmen and F. sandrasica Pesmen & Quezel species extracts on corpus cavernosum (CC). A totality of 20 adult male Sprague-Dawley rats (diabetic and control groups) were induced by single intraperitoneal injection of 40 mg/kg of Streptozotocin. In vitro organ bath tests were carried out on rats to evaluate isometric pressure. Tissues were stretched with phenylephrine (Phe), and relaxation responses relevant to acetylcholine (ACh, 1 mM), sodium nitroprusside (SNP 0.1 mu M) and electrical field stimulation (EFS, frequency 20 Hz) were gained. Whole these concentration-response curves were replicated with aqueous extracts obtained from the aerial parts and roots. The extracts were active in both groups. It was found that root extracts of F. mughlae and F. sandrasica yielded 97.80% and 97.55% relaxation. Among the extracts of roots (especially roots of F. mughlae) showed the best activity. On the other hand, lyophilized aqueous extracts of aerial part (especially F. sandrasica) showed the worst activity. Based on this findings, the roots of this species deserve further in vivo assessments for their aphrodisiac potential