共查询到19条相似文献，搜索用时 125 毫秒
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对141例流行性出血热患者的心电图临床资料分析及1例流行性出血热患者猝死的原因和诱因探讨,提出流行性出血热患者心电图变化中的危险信号,以杜绝诱因,防止猝死的发生。 相似文献
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抗病毒抗生素17997体内外抗病毒作用及抑制机制的研究 总被引：3，自引：0，他引：3
17997是由我国云南省思茅地区分离的一株链
霉菌所产生的广谱抗病毒抗生素,为非核苷类化合物。在细胞培养内,对单纯疱疹病毒Ⅰ型
、Ⅱ型,人免疫缺陷病毒Ⅰ型,水疱性口炎病毒及柯萨奇病毒B3均有明显抑制作用,IC50在微摩尔或低于微摩尔水平。体内实验对小鼠单纯疱疹病毒Ⅰ型及Ⅱ型脑炎有统计显
著性的治疗效果,可降低死亡率,延长小鼠平均生存日;对恒河猴的猴免疫缺陷病毒急性感
染,17997预防加治疗给药可降低血浆病毒滴度;对家兔单纯疱疹病毒Ⅰ型角膜炎有统计意
义的治疗效果;对豚鼠单纯疱疹病毒Ⅰ型皮肤感染及乳牛乳头纤维瘤均有治疗作用。17997
无直接灭活病毒作用,不影响病毒吸附及释放,对病毒核酸聚合酶无抑制活性,可能作用于
病毒复制循环的早期阶段。 相似文献
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53岁的曹操在亲率大军征服乌桓凯旋后，作《步出夏门行》，其中“老骥伏枥，志在千里。烈士暮年，壮心不已。”这几句诗被古往今来的人们广为传颂。这几句诗可以说是对李河民的执著追求中国卫生防疫事业的真实写照，他为新中国的卫生防疫事业默默奉献、不懈追求。长期的研究工作，使李河民在乙脑疫苗、肝炎疫苗、麻疹活疫苗、人用狂犬病疫苗、流行性出血热疫苗等方面均有建树，成为我国病毒研究的重要开拓者和见证人。 相似文献
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<正>云南省地方病防治所是在原云南省流行病防治研究所的基础上,为充分利用现有卫生资源,增强疾病预防与控制的能力而新组建的,是云南省卫生厅直属的省级预防医学防治研究机构,主要从事鼠疫、流行性出血热等自然疫源性疾病;碘缺乏、氟中毒等地方病;血吸虫等寄生 相似文献
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肾综合征出血热（hemorrhagic fever with renal syndrome,HFRS）是由黑线姬鼠、大林姬鼠、褐家鼠等携带的汉坦病毒、汉城病毒、普马拉病毒等引起的一组自然疫源性疾病。 相似文献
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<正>云南省地方病防治所是在原云南省流行病防治研究所的基础上,为充分利用现有卫生资源,增强疾病预防与控制的能力而新组建的,是云南省卫生厅直属的省级预防医学防治研究机构,主要从事鼠疫、流行性出血热等自然疫源性疾病、碘缺乏、氟中毒等地方病,血吸虫等寄生虫病及云南地方性爆发性心肌炎等不明原因疾病的防治研究工作。 相似文献
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当前,我国草原鼠害十分严重,已成为引发草原退化、沙化、水土流失的重要因素,并严重威胁着我国畜牧业可持续发展、草原生物多样性保护、草原生态环境建设以及人民身体健康。文章阐述了我国草原鼠害的严重性、防治现状与问题,建议:重新审视草原功能定位,全面调整“鼠-畜-草”三者关系;加大对“水源地”、“沙源地”、“疫源地”草原鼠害的治理力度,遏制生态环境恶化的势头;加大科研投入,全面提升草原鼠害防治水平。 相似文献
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HARALD RSCH 《中国科学院院刊(英文版)》2014,(2)
Saving energy is crucial to the survival of animals living in the cold regions of the world. A small marmot-like rodent from the Arctic is world champion when it comes to energy saving. According to YAN Jun from the CAS-MPG Partner Institute for Computational Biology in Shanghai, this makes the Arctic ground squirrel extremely suitable for studying the changes that occur at the molecular level during rodent hibernation. Based on this, the scientist and his colleagues aim to discover exactly how the animals can attain such dramatic reductions in their metabolic activity. 相似文献
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纤维素分解菌的分离、筛选及其环境适应性初步研究 总被引：14，自引：0，他引：14
以滤纸平板和羧甲基纤维素钠培养基为基础培养基,从采集的样品中筛选出具有分解纤维素能力的38株菌株。采用纤维素刚果红培养基进行粗选,得到10株透明圈较大的菌株。将这10株菌株进行液体发酵培养,测定其酶活力,得到4株分解纤维素能力较强的菌株。对这4株菌株进行碳源、温度、pH值的适应性研究。结果发现,真菌3和真菌6的适应性都比较好。 相似文献
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Jean Chaline 《Endeavour》1977,1(2):44-51
The rodents, especially voles, evolved very rapidly during the Quaternary era. Their remains, particularly the teeth, were fossilised by the thousand in prehistoric deposits. The sites can be dated from the degree of evolution attained by the teeth. Since rodents are closely adapted to their biotopes and live under well defined climatic conditions, they are extremely valuable for reconstructing the landscapes and climates of prehistory. In many cases, a single rodent tooth can be used to assess the age of a human skull or a prehistoric settlement, and throw light on the environment and climate of the time. 相似文献
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Combined static stress experiments are discribed in which thin walled tubes of a nickel-chrome-molybdenum steel are subjected to combined axial tension and internal pressure, and to combined axial compression and internal pressure. The axial loading was applied by means of a 30 ton hydraulic testing machine and the internal pressure by a pendulum dynamometer and pump. Tangential strains were measured by two newly developed hydraulic lateral extensometers, one of which was used in the axial tension experiments and the other in the axial compression tests. These extensometers possess the advantage over previous types for this work in that they measure accurately the average of the tangential strains over a considerable length of the tubes instead of at a single cross-section. Axial strains were measured with a Martens extensometer. Additional torsion tests are described. The experimental results checked well with the recently suggested constant energy of distortion theory of strength. 相似文献
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介绍了１５０株三元能量处理妥布拉霉素（ＴＯＢ）正突变株的筛选研究，通过初筛获得２５株ＴＢＯ突变株，从中分离出１５株高产菌，进一步复筛双从中挑选出５株产量更高的产高菌株。通过最佳培养基配方的发酵试验，确定联抗性能最佳的菌株为ＱＢ－１３０－Ｓ１。实验表明：三元能量用于ＴＯＢ菌诱变，不仅提高了产抗水平，而且菌株生长时间缩短，经４次传代，高产菌株的遗传性能稳定。 相似文献
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BackgroundWe aimed to test the possibility of improving polypeptide production from soybean meal fermentation by engineered Aspergillus oryzae strains. Four different protease genes were cloned and transformed into wild-type A. oryzae, and the engineered A. oryzae strains were then used for soybean meal fermentation.ResultsThe results showed different degrees of improvement in the protease activity of the four transformants when compared with wild-type A. oryzae. A major improvement in the polypeptide yield was achieved when these strains were used in soybean meal fermentation. The polypeptide conversion rate of one of the four transformants, A. oryzae pep, reached 35.9%, which was approximately twofold higher than that exhibited by wild-type A. oryzae. Amino acid content analysis showed that the essential amino acid content and amino acid composition of the fermentation product significantly improved when engineered A. oryzae strains were used for soybean meal fermentation.ConclusionsThese findings suggest that cloning of microbial protease genes with good physicochemical properties and expressing them in an ideal host such as A. oryzae is a novel strategy to enhance the value of soybean meal. 相似文献