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BACKGROUND Ectoparasites of mammalian hosts play an important role for transmission of diseases from the host reservoirs to human. The aim of this study was to determine the species composition and infestation parameters for parasitic arthropods associated with Rhombomys opimus. METHODS Ectoparasites of R. opimus were collected from seven endemic district of ZCL in Iran including Shirvan and ...

The prevalence of head lice (Pediculus humanus capitis) is one the most common infections at all ages, especially among students, and widespread worldwide. This study aimed to investigate infection external factors affecting distribution P.capitis in girls' schools Garmsar city east Semnan province (Iran) from October 2017 April 2018. was descriptive analytical. A total 850 students aged 7 16 1...

a flow-duration curve (fdc) illustrates the relationship between the frequency and magnitude of streamflow. applications of fdc are of interest for many hydrological problems related to hydropower generation, river and reservoir sedimentation, water quality assessment, water-use assessment, water allocation and habitat suitability. this study was carried out in 11 selected watersheds with commo...

The magnitude of crustal extension across the northern Basin and Range province is a matter of longstanding controversy; estimates range from 10 to 3009~,. Recently published estimates of extension across the southern Basin and Range province (36°N) are in the range of 80-100%. Thus, the larger values suggested for the northern part of the province (40°N) seem to require substantial countercloc...

Abstract This study is the first that worked on temporal and spatial distributions of annual rainfall (Pyear) maximum 24-h (Pmax24h) in Semnan province. For this purpose, different statistical were used to estimate Pyear Pmax24h Six synoptic stations across province studied all had complete data. Different return periods studied. The goodness fit test for showed about 67% follow Generalized Par...

Some 43 samples collected from surficial sediments of Semnan Province (Alborz zone) and NE Isfahan Province (Central Iran zone) were analyzed, for constrains on provenance. Sand fraction were analyzed by XRF analyzer Philips Model PW 2450 in the laboratory of the Geology Survey Iran (GSI). Precision was 0.01%. Furthermore, 8 selected sediment samples and 8 samples from rock units from surroundi...