For the demographer and economic historian all movements of population are important and deserve, so far as possible, to be explained; but for the student of social and medical history the modern rise of population is a unique event whose interpretation is not only of the greatest historical interest but is also essential to an understanding of some of the most formidable contemporary problems....

13 Prior studies of mitochondrial genomic variation reveal that the Japanese brown frog Rana 14 tagoi comprises a complex of cryptic species lineages, and that R. sakuraii arose from within 15 this complex. Neither species forms a monophyletic group on the mitochondrial haplotype tree, 16 precluding a simple explanation for the evolutionary origins of R. sakuraii. We present a more 17 complete ...

This paper explores the role of geography in economic development and demographic transition. It presents a growth model where survival is endogenously determined and where the odds of survival and the returns to labor are higher in geographically favorable regions. Higher life expectancy prompts parents to devote more of their resources to old-age consumpion and enjoyment. Consequently, they i...

habrobracon hebetor say (hymenoptera: braconidae) as an ectoparasitoid of larval stage of lepidopterous pests is widely used in biological control programs. in the present research, the effect of field recommended doses of imidacloprid, indoxacarb and deltamethrin were studied on life table parameters of h. hebetor in pupal stage treatment. one hundred, two-day-old pupae were treated with 1 mic...

life table of almond moth, cadra cautella walker was studied on four main dry and semi-dry date palm varieties (deyri, zahedi, piarom, and rabbi) of iran under laboratory conditions. data were analyzed based on the age-stage, two-sex life table theory. duration of total preadult stages was 42.54, 45.79, 51.48 and 50.41 days on deyri, zahedi, piarom, and rabbi, respectively. the highest fecundit...

background ulcerative colitis (uc), as the prototype of inflammatory bowel disease of the large bowel, is increasing in iran and other developing countries. there are few studies that discuss the properties of this disease in the islamic republic of iran. the result of this review may provide a general consensus about the epidemiological features of uc in iran. methods this was a qualitative, s...

background: recent studies have demonstrated controversial results and somewhat increased frequency of multiple  sclerosis  (ms). we reevaluated  the  files of  ms patients  from qom province of iran in order to investigate the epidemiology of the disease. methods:   demographic   and  clinical records  of  592  ms patients  were reviewed, which included; age, sex, date  of birth, marital and o...

objective: in some areas of iran self -immolation is one of the most common ways for committing suicide and it is very disturbing and painful for those who witness it. due to the presence of the families/relatives of the self-immolation victims in the psychiatric clinics seeking for the treatment of ptsd sings, we decided to carry out a research in this respect. method: this descriptive cross-s...