The present study was conducted in southern part of Caspian Sea, Iran. All samples were taken during 1995-1996 and 2006-2007 in 6 transects such as Lisar, Anzali, Sefidroud, Noushahr, Babolsar and Amirabad. The phytoplankton compositions were significantly changed with seasons (P<0.05). In compare to after Mnemiopsis leidyi arrival, the population of phytoplankton species were increased. Totall...

The correlation coefficient of climatic factors necessary for cultivation of saffron between Sabzevar stations and those of southem parts of Khorasan is strong. In October, no frost can be seen in Sabzevar, but it can be seen in other stations. This study showed that there was no difference in viewpoints of climatic factors in cultivation stations in both areas. Comparing the correlation coeffi...

Karyological characteristics of bighead goby (Neogobius kessleri) in the Caspian Sea were studied by examining 30 metaphase chromosome spreads from the kidney tissue of 10 specimens. The chromosome number of this species was found 2n=46 and the arm number as NF=46. The prepared karyotype of this species consisted of 23 pairs acro-telocentric (a-t) chromosomes. The chromosomal formula can be sta...

Background The clinical outcome of HBV infection is highly heterogeneous which correlates with viral factors such as genotypes, viremia and mutants. Evidences showed that HBV genotypes have a role in prevalence of variants, IFN therapy and disease severity. So far, 10 HBV genotypes (A to J) have been identified with distinct geographical distribution. Hence, knowledge of the genotype infecting ...

The aim of the present study was to estimate the prevalence of rheumatoid arthritis in the southern part of Denmark. Using a screening questionnaire, telephone interview, register data, and a clinical examination cases were ascertained from a random sample of 4995 individuals over the age of 15. As case definition we used the original and modified 1987 American College of Rheumatology classific...

amoebiasis is one of the most important human diseases in many countries especially in tropical and sub-tropical regions. this study was carried out from august 1999 to february 2002 in order to determine the ratio of entamoeba histolytica / entamoeba dispar in some regions of iran. a total of 16,592 stool samples were randomly collected from different agegroups in central, northern and souther...

The geographic distribution of multiple sclerosis is nonrandom, as the disease is more prevalent in temperate than in tropical regions. Surveys conducted between 1970 and 1996 suggest that multiple sclerosis is more prevalent in the northern part of the United Kingdom than in the southern part. This north-south gradient ("the latitudinal gradient") might be a methodological artifact, because hi...

The Present study was Include some physical and chemical characteristics for east southern AL-Hammar marsh south of Iraq during November 2006 to 2007 .The Samples were collected on monthly two stations, first AL-Nagarah second ALBurgah, change temperature. highest temperature value in august 30mºand 25mº station respectively, wheel lowest February 11mº January 10mº station. salinity Ogest 2 par...