نتایج جستجو برای: dating back at least four thousand years
تعداد نتایج: 4739960 فیلتر نتایج به سال:
Global surveillance for a novel rhinovirus genotype indicated its association with community outbreaks and pediatric respiratory disease in Africa, Asia, Australia, Europe, and North America. Molecular dating indicates that these viruses have been circulating for at least 250 years.
Dating applications (apps) on smartphones have become increasingly popular. The aim of this study was to explore the association between the use of dating apps and risky sexual behaviours. Data were collected in four university campuses in Hong Kong. Subjects completed a structured questionnaire asking about the use of dating apps, sexual behaviours, and sociodemographics. Multiple linear and l...
in order to study the effect of sowing date and plant density on some quantitative traits and yield of sugar beet genotypes a field experiment was carried out at sugar beet seed production research station of karaj in 2006. treatments arranged in a split, split plot experiment based on completely randomized block design with four replications. the main factors were two sowing dates as 14 april ...
Objective: Low back pain is the most common skeletal disorder worldwide that 50% to 80% of people experience it at least once in their lifetime. Physical and psychological factors in the work environment can relatively contribute to low back pain. In this study, we examined the prevalence of low back pain and influential factors in its development among nursing staff. <...
Excavations in a playa along the 1992 rupture of the Emerson fault reveal evidence of two paleoseismic events, with only one large prehistoric rupture in the past 15 millennia. Accelerator mass spectrometer radiocarbon ages of charcoal from playa sediments and from faultscarp colluvium directly beneath the playa beds indicate that the last large prehistoric slip event occurred about 9000 ka. Tr...
this study is about philosophical view of soltan ali khorasani gonabadi, the writer of dastur al-alag manuscript, dating back to 1524 ad, on physicians. the original manuscript, kept at shiraz university of medical sciences museum, was studied thoroughly. in the preface of the book, soltan ali khorasani gonabadi explained his holistic view on medicine and considered ethical and philosophical ba...
The modulation of developmental biochemical pathways by mechanical cues is an emerging feature of animal development, but its evolutionary origins have not been explored. Here we show that a common mechanosensitive pathway involving β-catenin specifies early mesodermal identity at gastrulation in zebrafish and Drosophila. Mechanical strains developed by zebrafish epiboly and Drosophila mesoderm...
The article considers the discovery of a complex Early Paleolithic sites with bifacial industry in central part Vietnam. Vietnam is one unique regions Southeast Asia, terms settlement ancient populations people, evolution their culture and development man himself, due to its geographical proximity South China north, during existence Sundaland, could serve as transit territories migrations homin...
Refined radio-isotopic dating techniques have been applied to Orgnac 3, a Late Acheulean and Early Middle Palaeolithic site in France. Evidence of Levallois core technology appeared in level 4b in the middle of the sequence, became predominant in the upper horizons, and was best represented in uppermost level 1, making the site one of the oldest examples of Levallois technology. In our dating s...
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