We have examined the long time series of observations of E-region virtual height (1948–2006) and critical frequency (1935-2006) hitherto made by the Tromsø ionosonde at 70 N, 19 E. Combining a simplistic trend analysis with a rigorous treatment of errors we identify a negative trend in critical frequency. While a similar analysis of the virtual height hE also suggests a negative trend, a closer...

We present the first precision measurement of the spin-dependent asymmetry in the threshold region of 3He(e,e') at Q2 values of 0.1 and 0.2 (GeV/c)2. The agreement between the data and nonrelativistic Faddeev calculations which include both final-state interactions and meson-exchange current effects is very good at Q2 = 0.1 (GeV/c)2, while a small discrepancy at Q2 = 0.2 (GeV/c)2 is observed.

The mechanism of the four-quark production light scalar isovector state ${a}_{0}(980)$ in $D\ensuremath{\rightarrow}\ensuremath{\eta}\ensuremath{\pi}{e}^{+}{\ensuremath{\nu}}_{e}$ decays is discussed. It shown that characteristic features shape $\ensuremath{\eta}\ensuremath{\pi}$ mass spectra expected our scheme can serve as indicator and internal structure resonance.

The importance of rainbow trout (Onchorhynchus mykiss) in Iran aquaculture industry on one hand, and increasing the mortality of this fish due to outbreaks of infectious diseases, on the other hand, indicate the requirement for more profound understanding the rainbow trout immune system and access to laboratory tools for definitive diagnosis of its diseases. One of the most important defense me...

Background: The apolipoprotein E (APOE) polymorphism is known to affect various neurologic disorders with different effects on the immune system and CNS repair. However, previous studies on possible modulation of the clinical course of multiple sclerosis (MS) by APOE polymorphism have been inconsistent. Objective: To clarify the issue for MS patients' management and future research. Methods: Th...

abstract in order to identify the plant parasitic nematodes of cucumber field and greenhouses in jiroft and kahnoj regions, during 2007 and 2008, 45 soil and root samples were collected. in this survey, 13 genus and 16 species were identified. genus ektaphelenchoides and one species of it, e. compsi and aphelenchus isomerus are reported for the first time in iran. the first species was found in...

canine ehrlichiosis is a zoonotic rickettsial disease transmitted by ticks. in the present study, 198 companion dogs of different ages were examined for serum antibody detection against ehrlichia canis by means of immunochromatography assay. the dogs were selected among referred cases to veterinary hospital of shahid chamran university of ahvaz, southwestern iran from november 2008 to march 201...

As widespread deserts is located in west and southwest of Iran plateau, dust storms form due to west andsouthwest systems over Syria or Iraq as well as Arabian Peninsula. These systems severely affect west and southwestregions. Sometimes the fine dusts transmit to central, north east, and east regions. In this study for investigating dustysynoptical patterns, meteorological data at 5 synoptic s...

Arasbaran is one of the most important protected regions in Iran located in NW of the country and east of E Azarbaijan Province. Several reports have been published on the mycobiota of this region however there is only few records about rust fungi of Arasbaran. Our research on rust fungi of Arasbaran region get started since 2006. During this study, several rust taxa collected and identified fr...

Background & Objectives: Mosquitoes (Diptera: Culicidae) are medically considered as one of the most important species of insects in terms of disease transmission to human beings; hence, they can be vectors of remarkable diseases such as malaria, West Nile, dengue fever, yellow fever, and filariasis. This study aimed to determine the species diversity and larval habitat characteristics of mosqu...