نتایج جستجو برای: dating back at least four thousand years
تعداد نتایج: 4739960 فیلتر نتایج به سال:
Archaeological research has identified the use of cultivated cotton (Gossypium barbadense) in the ancient Andes dating back to at least 7800 years ago. Because of unusual circumstances of preservation, 6000-year-old cotton fabrics from the Preceramic site of Huaca Prieta on the north coast of Peru retained traces of a blue pigment that was analyzed and positively identified as an indigoid dye (...
In arid and semi-arid regions of the world including Iran, floodwaters are the main resource to supply irrigation water. Floodwater spreading also plays an effective role in replenishing groundwater, stabilization of alluvial soil, and vegetation restoration. Qazvin traditional garden is an example of such floodwater spreading mechanism, dating back to over a thousand years ago, according to hi...
Introduction: Oral focal mucinosis (OFM) is the soft tissue counterpart of cutaneous fo-cal mucinosis (CFM) and is often misdiagnosed as an oral myxoma. OFM occurs during the fourth and fifth decades of life, predominantly in women (two females per male). Case Report: A 22-year-old lactating female presented with a growing painless, sessile tumor with pale pink color and a lobulated surface wi...
Received: 25.11.2009; Accepted: 13.09.2011 doi: 10.1016/S0377-1237(11)60107-X • Gravida2: Six years back, spontaneous abortion at 12 weeks gestation, managed at a civil hospital. • Gravida3: Five years back, spontaneous abortion at 20 weeks gestation, managed at a peripheral military hospital. • Gravida4: Four years back, transvaginal cerclage given, spontaneous abortion at 16 weeks gestation, ...
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. methods: in this cross-s...
The recording of numbers appears to pre-date the emergence of writing and excavations of the clay tablets of civilisations in the Middle East have shown that clay tablets were used to keep account of activities undertaken in a systematic fashion. Correspondingly, various forms of abacus have been used types of calculation from the Sumerian abacus dating from about 4 ½ thousand years ago to the ...
This article is aimed at analyzing three forms of violent behaviour, in addition to what it that triggers known as “interactions among behaviours”; is, feeds back into behaviours, whether the victim and/or aggressor simultaneously. The study sample consisted 433 adolescents aged 12–19 years from four educational centers: two ESO and FPB a municipality Greater Bilbao. results show differences ba...
The genomic changes underlying both early and late stages of horse domestication remain largely unknown. We examined the genomes of 14 early domestic horses from the Bronze and Iron Ages, dating to between ~4.1 and 2.3 thousand years before present. We find early domestication selection patterns supporting the neural crest hypothesis, which provides a unified developmental origin for common dom...
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