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“精制多价抗海蛇血清”的制作 总被引:1,自引:0,他引:1
目的 海蛇均为前沟牙毒蛇 ,分布于太平洋及印度洋沿岸 ,大西洋没有海蛇。中国产海蛇 1 6种 ,分布于北起辽宁、南至海南及广西沿海 ,分布较广、数量较多及蛇伤发病率较高的海蛇为青环海蛇( H ydrophis cyanocinctus)和平颏海蛇( Laticauda semifasciata)。调查结果表明 ,被海蛇咬伤如不及时处理 ,通常有 50 %的患者死亡。在中国广西北海市每年均有被海蛇咬伤中毒致死的病例。为研制中国、日本及东南亚沿海国家主要有毒海蛇青环海蛇和平颏海蛇咬伤的有效治疗药“多价抗海蛇毒血清”,填补急救医学空白。 方法 从中国北部湾产青环海蛇和平… 相似文献
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《动物学杂志》1978,13(3)
我国的蛇类目前已知有173种,其中毒蛇48种。有10种毒蛇为后沟牙毒蛇,其毒性弱,且毒牙不易咬到人体,实际上无危害。海蛇在我国已知有15种,生活于海水中,毒性虽强,但人们接触机会少。其它23种陆生毒蛇,有很大一部分种类其分布范围狭窄或数量少而罕见。所以,对于人们危害较大,经常造成蛇伤的毒蛇只有10种左右,如:蝮蛇、眼镜蛇、竹叶青、尖吻蝮、银环蛇等。从地理分布上来看,蝮蛇除了青藏高及北纬25度左右以南地区尚无报道外,全国各地均有分布,其余几种主要毒蛇均分布于我国长江以南地区。我国民间对于蛇伤防治工作已有很多经验。解放以后,在毛主席的无产阶级革命路线指引下,蛇伤防治 相似文献
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蛇毒所致微循环障碍的处理 总被引:2,自引:0,他引:2
地球上有蛇类2700余种,其中毒蛇570余种;我国有蛇类203种,其中毒蛇47种,包括陆生剧毒蛇31种和海蛇16种。对人类危害较大的有陆生剧毒蛇9种和海蛇2种,即蝰蛇科的五步蛇(AgkistrodonacutusGuenther)、蝮蛇(Agkist... 相似文献
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据有关部门统计,全世界蛇类有2700多种,其中毒蛇有600多种。我国的蛇类有200多种,其中毒蛇类有50多种,包括10多种剧毒蛇如眼镜王蛇、金环蛇、眼镜蛇、五步蛇、银环蛇、蝰蛇、蝮蛇、竹叶青、烙铁头、海蛇等,咬伤人后能致人于死亡。在我国,蛇伤病人较常见, 相似文献
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基于GIS的城乡交错带土壤养分时空变化及格局分析——以北京市大兴区为例 总被引:10,自引:0,他引:10
通过GPS定位采取土样,标准方法的土样化验、借助GIS技术,应用Kriging插值方法,分析研究了城乡交错带土壤肥力水平变化及其空间分布。研究结果表明,由于近20a土地集约化利用和采用秸秆还田等土壤培肥技术,土壤有机质、全氮、碱解氮和速效磷含量都增加了,而速效钾含量因为作物产量增加而施用钾肥不足,含量却下降了。各肥力因素情况如下:1982年土壤有机质含量及其空间分布情况是:6~10g/kg之间的,占总面积的61.23%;10~12g/kg之间的,占总面积的35.17%;12~15g/kg,占总面积的3.6%;2000年土壤有机质含量及其空间分布情况是:6~10g/kg之间的,占总面积的14.35%;10~12g/kg之间的,占总面积的33%;12~15g/kg之间的,占总面积的32.43%;15~20g/kg之间的,占总面积的12.91%;20g/kg以上,占总面积的7.31%。1982年土壤全氮含量及其空间分布情况是:小于0.5g/kg的,占总面积的28.72%;0.5~0.8g/kg的,占总面积的60.81%;2000年土壤全氮含量及其空间分布情况是,在0.8~1.0g/kg之间的,占总面积的48.57%;含量在1.0~1.2g/kg之间的,占总面积的28.87%;含量在0.5~0.8g/kg之间的,占总面积的20.67%。1982年土壤碱解氮含量及其空间分布情况是:45~60mg/kg之间的,占总面积的44.1l%;60~75mg/kg之间的,占总面积的28.89%;30~45mg/kg之间的,占总面积的26.35%;2000年土壤碱解氮含量及其空间分布情况是:在60~75mg/kg之间的,占总面积的57.08%,75~90mg/kg之间的,占总面积的33.4%。1982年速效磷含量及其空间分布比较简单,主要分布在5~10mg/kg之间,占总面积的82.34%;2000年速效磷含量及其空间分布主要是在20~30mg/kg之间,占总面积的55.16%;15~20mg/kg之间,占总面积的28.89%。1982年土壤速效钾含量及其空间分布主要是在75~100mg/kg之间,占总面积的52.69%;含量在50~75mg/kg之间,占总面积的36.82%;2000年土壤速效钾含量及其空间分布主要是在50~75mg/kg之间,占总面积的49.98%,含量在75~100mg/kg之间,占总面积的35.85%。 相似文献
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全世界蛇辈子孙约2500种,毒蛇占650种,其中海蛇52种,我国有23种,北部湾约10种。海蛇全属毒蛇,毒液比陆上毒蛇强40倍,海蛇跟鱼类被捕混杂网中,渔民选鱼时偶被咬伤,两腿发麻瘫痪,牙关紧锁,终因神经呼吸麻痹而丧命黄泉。这次我们来到广西北海地角渔村,跟渔民选鱼,开工之前,他们便关切地告诫道:“当心别碰着它呵!”尽管 相似文献
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Although the importance of the endosperm as a food store inmany angiosperm seeds is well known, its significance duringearly embryogenesis has been neglected. In many interspecifichybrids, and in some other situations, embryos do not developfully and abort. It has often been stated that this is causedby the endosperm failing to conduct sufficient nutrients tothe embryo, but seldom has it been suggested that the endospermactively controls most of the early stages of morphogenesisof the embryo. Information gleaned from a broad survey of theliterature, combined with additional evidence presented here,obtained fromSolanum incanumand interspecific hybrids, indicatethat the endosperm is dynamic and very active in regulatingearly embryo development. This requires highly integrated geneticcontrol of rapidly changing metabolism in the endosperm. Ininterspecific hybrids, lack of coordination may cause unbalancedproduction of growth regulating substances by the endospermand hence abortion of the embryo, or even unregulated productionof nucleases and proteases resulting firstly in autolysis ofthe endosperm and then digestion of the embryo. The endospermmay thus serve to detect inappropriate hybridization of speciesor ploidy levels and so prevent waste of resources by producingseeds that would result in sterile hybrids or unthrifty subsequentgenerations. This discriminatory function of the endosperm hasdiminished during evolution and domestication of the crop plantSolanummelongenaL.Copyright 1998 Annals of Botany Company Solanum, embryo morphogenesis, endosperm, hybrid, seed development. 相似文献
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环腺苷酸应答元件结合蛋白与学习记忆 总被引:2,自引:0,他引:2
环腺苷酸(cAMP)应答元件结合蛋白(cAMP response element binding protein,CREB)是一种核转录因子,可与cAMP反应元件结合,调节基因转录,具有调节精子生成,昼夜节律,学习记忆等功能.近年来关于其在学习记忆中的作用成为医学研究热点.CREB是神经元内多条信息传递途径的汇聚点,参与长时记忆形成和突触可塑性.长时记忆(long-term memory)形成需依赖CREB介导的基因转录,干扰或抑制CREB活性可破坏长时记忆.长时程增强(long-term potentiation,LTP)是研究学习记忆的理想模型,在LTP诱导和维持过程中均可观察到CREB活性持续升高.但增龄过程中,海马CREB活性下降,影响学习记忆功能,与许多神经退行性疾病发生有关. 相似文献
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Höpfl G Ogunshola O Gassmann M 《American journal of physiology. Regulatory, integrative and comparative physiology》2004,286(4):R608-R623
For most organisms oxygen is essential fo life. When oxygen levels drop below those required to maintain the minimum physiological oxygen requirement of an organism or tissue it is termed hypoxia. To counter act possible deleterious effects of such a state, an immediate molecular response is initiated causing adaptation responses aimed at cell survival. This response is mediated by the hypoxia-inducible factor-1 (HIF-1), which is a heterodimer consisting of an alpha- and a beta-subunit. HIF-1 alpha protein is stabilized under hypoxic conditions and therefore confers selectivity to this response. Hypoxia is characteristic of tumors, mainly because of impaired blood supply resulting from abnormal growth. Over the past few years enormous progress has been made in the attempt to understand how the activation of the physiological response to hypoxia influences neoplastic growth. In this review some aspects of HIF-1 pathway activation in tumors and the consequences for pathophysiology and treatment of neoplasia are discussed. 相似文献
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Michele Rivkin-Flsh 《Medical anthropology quarterly》2000,14(1):119-120
Pragmatic Women and Body Politics. Margaret Lock and Patricia A. Kaufert. eds. Cambridge, UK: Cambridge University Press, 1998. xii +364 pp.
Maternities and Modernities: Colonial and Postcolonial Experiences in Asia and the Pacific. Kalpana Ram and Margaret Jolly. eds. Cambridge, UK: Cambridge University Press, 1998. xiv. 305 pp. 相似文献
Maternities and Modernities: Colonial and Postcolonial Experiences in Asia and the Pacific. Kalpana Ram and Margaret Jolly. eds. Cambridge, UK: Cambridge University Press, 1998. xiv. 305 pp. 相似文献