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青海冬虫夏草生长于高寒高海拔区,其独特的药用和营养价值深受国内外消费者的青睐,需求量不断增加,价格一路攀升,随之在冬虫夏草资源开发利用和管理中出现了一些不容忽视的问题。加强冬虫夏草资源管理,对于保护草原生态,全面实现冬虫夏草资源持续开发利用,有效提高虫草产区社会经济协调发展和增加农牧民收入具有重要意义。 相似文献
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北京大学校园内每天太约有3万名学生和教师学习,生活。但很少人知道,这里还生活着上百种鸟类、几十种陆生脊椎动物。庇护,养育它们的,正是北大校园内自由奔放的生态系统。[编者按] 相似文献
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在三江源地区,孩子们7月底还在上课。大约两年前,青海省玉树州所有学校的暑假从七八月份提前到了五六月份,改名为“虫草假”。称多县的一位小学老师说,五六月份是采挖冬虫夏草的季节,要是暑假不改为“虫草假”,到了五月,家长把小孩子几乎都带走挖虫草去了,一百多人的学校,最多只有十几个孩子可能还会来上学。 相似文献
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J.R. Silver 《Journal of the history of the neurosciences》2013,22(2):144-153
In 1825 Astley Cooper described the first account of ligation of the abdominal aorta. The patient developed loss of feeling in his lower limbs, incontinence of urine and died after several days. A post mortem was carried out but not, unfortunately, of the spinal cord. This case was recorded again by Astley Cooper, by Brock in 1940-41, and again by Ellis in 1994. Whilst there was early recognition of infarction of the brain, infarction of the spinal cord was thought to be almost unknown by Charcot in 1883 but it was recorded in the English literature by Bastian in 1886 and Williamson in 1894. There were isolated case reports but it was the advent of major surgery upon the aorta in the Second World War that drew attention to the frequency of this condition. The subsequent evolution of our recognition of infarction of the cord is described. The present situation, where it can be caused by a fall in blood pressure without there being direct interference to the blood supply, is evaluated. 相似文献
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Elisabeth Schültke 《Journal of the history of the neurosciences》2013,22(3):300-307
Ludwig Guttmann was a pioneer of the idea of rehabilitation for victims of spinal cord injury. He looked beyond the physical survival of his patients, to their re-integration into a social life worth living. While the International Stoke Mandeville Games are fairly well known to the general public as a gathering for physically handicapped athletes, less is known about the man who helped start the movement. On the occasion of the recent Sydney 2000 Paralympics, this paper reviews the contribution of Ludwig Guttmann, who introduced sport into the life of paralyzed patients. 相似文献
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Rhinoceros remains are commonly found in Chinese Pleistocene archaeological localities. This study examines the characteristics of the Rhinoceros sinensis sample from Panxian Dadong, a karst cave in the mountains of western Guizhou province, with a mammalian fauna in association with stone artefacts and human remains from the late Middle Pleistocene (MIS 6‐8). The distribution of skeletal elements shows a predominance of foot (metapodial and phalanges) and lower limb (carpals and tarsals) bones, while the dental age‐at‐death profile, constructed using dental eruption and tooth wear data, is characterised by a high frequency of prime age adult teeth. There is little taphonomic evidence for the involvement of non‐human carnivores or natural agencies in the formation of the faunal assemblage. Instead, it appears that human activities were responsible for the unexpected prevalence of prime age adults. Copyright © 2008 John Wiley & Sons, Ltd. 相似文献