منابع مشابه
Lichen-like symbiosis 600 million years ago.
The fossil record of fungi and lichens is scarce. Here we report the discovery of lichen-like fossils, involving filamentous hyphae closely associated with coccoidal cyanobacteria or algae, preserved in marine phosphorite of the Doushantuo Formation (between 551 and 635 million years old) at Weng'an, South China. These fossils indicate that fungi developed symbiotic partnerships with photoautot...
متن کاملanalysis of reading comprehension needs of the students of paramedical studies: the case of the students of health information management (him)
چکیده ندارد.
15 صفحه اولReconstruction the climatic changes of the last 600 years in Southeast Iran, study area, the Lake Sardarya, Taftan Volcano
Introduction: In order to recognize the mechanism of local climatic settings and to be able to establish the future climatic scenarios is essential to understand the past climatic and environmental conditions of the each area. This is also important to explore the response of local areas to the global climatic variations. The palaeoclimate researches carried out in Iran mainly considered the g...
متن کاملstudents perception of computerized toefl test
تحقیق حاضر به بررسی درک دانشجویان از مزایا و معایب آزمون های کامپیوتری تافل و تاثیر جنسیت بر درک آنها پرداخته است. شرکت کنندگان در این تحقیق 100 نفرزبان آموز مرد و زن بودند که در آزمون کامپیوتری تافل در ایران شرکت کرده بودند. پرسشنامه یی که در مورد مزایا و معایب آزمون های کامپیوتری در مقایسه با آزمون های کاغذی توسط محقق تهیه شده بود جهت تکمیل به این افراد ارایه شد. داده های بدست آمده در این مطا...
15 صفحه اولThe dangers of dairy farming: the injury experience of 600 workers followed for two years.
In order to better understand the work-related injuries sustained on central New York dairy farms, we undertook a two-year population-based study of 600 farmers and farm workers on 201 dairy farms. During the observation period, 1984-1986, 151 persons had 200 injuries, giving an injury rate of 16.6%/year (166 injuries/1,000 workers/year). Men were injured more often than women (p less than or e...
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ژورنال
عنوان ژورنال: Science & Technology Studies
سال: 1992
ISSN: 2243-4690
DOI: 10.23987/sts.55041