mehran plain is located in the cultural region of south west iran. studying the geographic location of this region in relation to the formation of early states is important. the cultural materials of chogha ahowan in mehran plain would explain the process of urbanization and cultural interactions of this region with its neighbors. according to the surveys conducted to collect necessary pottery ...

The Permian-Triassic boundary records the most severe mass extinctions in Earth's history. Siberian flood volcanism, the most profuse known such subaerial event, produced 2 million to 3 million cubic kilometers of volcanic ejecta in approximately 1 million years or less. Analysis of (40)Ar/(39)Ar data from two tuffs in southern China yielded a date of 250.0 +/- 0.2 million years ago for the Per...

Using daily minimum temperature data at 2481 stations provided by the National Meteorological Information Center (China) and reanalysis from NCEP/NCAR during period 1980 to 2019, effects of atmospheric low frequency oscillations (LFOs) on regional strong cooling events (RSCEs) in winter northern China are investigated, extended range forecast signals RSCEs extracted. The results show that: (1) ...

In the term "hoarseness" I include not only those coarse changes in the voice which render it rough and husky, but also those finer ones, by which it is altered in pitch as well as in clearness. Owing to these changes, a person who normally sings tenor songs is unable any longer to do so, because the highest notes first lose their clearness, and then are lost altogether, the compass being there...

many species of the freshwater pulmonate snail family lymnaeidae act as intermediate hosts in the transmission of digenean trematode larvae, including those of the causative agent of fasciolosis. based on this, current investigation was aimed to determine diversity and geographical distribution of lymnaeidae snails and role of biochemical indices in habitat of them in west azerbaijan province, ...

salmas plain is located at the west of uremia lake and at the 75 km of north of uremia city. the main river of the plain, called zulachai, is drained into uremia lake. salmas aquifer is one of the coastal aquifers of uremia lake and has hydraulic connection with the lake. the recent draught occurrences and increased water consumption in agriculture and drinking sections water have not only caus...

The paper presents the results of comprehensive studies on problem formation a deposit heavy metals in plant communities West Siberian Arctic and Subarctic. regularities concentration redistribution soil-plant system have been revealed. Excessive accumulation by different species is limited selectivity root absorption relation to certain elements, therefore it important calculate coefficient bi...

Siberian apricot (Prunus sibirica L.), an ecologically and economically important tree species with a high degree of tolerance to a variety of extreme environmental conditions, is widely distributed across the mountains of northeastern and northern China, eastern and southeastern regions of Mongolia, Eastern Siberia, and the Maritime Territory of Russia. However, few studies have examined the g...