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1.
小儿在年龄、生理、药理、解剖学方面与成人差别大,麻醉具有很大的危险性。在这里对小儿氯胺酮静脉麻醉追加用药作进一步分析。选择1岁─7岁小儿,一小时左右的手术20例,在氛胺酮肌注麻醉下(按5─8mp/kg肌注),用1%氯胺酮1mg/kg静脉注入维持麻醉。改变追加用药方法后,对药量、术中麻醉持续时间、术后苏醒时间及麻醉并发症进行分组对比分析:A组:10例,平均年龄已45岁,平均体重18.25kg。麻醉方法:术前,阿托品0.02─0.03/mg肌注,氯胺酮5.8mg/kg肌注后,按氯胺酮正常静脉麻醉追加,依次递减用药维持麻醉。首量1%氯胺酮1mg… 相似文献
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新疆鸡冠花食用色素粗成分与有害微量元素含量的测定 总被引:2,自引:0,他引:2
本以自制新疆鸡冠花(Celosia cristata L.)花食用色素为实验材料,分别对色素中的灰分、总糖、粗蛋白、粗脂肪、氨基酸总量和有害微量元素AS、Pb、Hg和Ca的含量进行了检测。结果表明:色素中各种成分的含量分别为:灰分18.6%,总糖l.06%,粗蛋白5.16%,粗肪脂0.13%,氨基酸总量5.08%;有害微量元素含量分别为:As0.033mg/kg,Pb0.038mg/kg,Hg0.18mg/kg,Cu0.061mg/kg。 相似文献
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深圳市场水产品中重金属与农药的含量及评价 总被引:7,自引:0,他引:7
2002年6月对深圳市场水产品中的重金属和农药含量进行了词查,结果表明:深圳市场水产品(本研究中水产品均以湿重计算)中各污染物质量分数分别为Hg0.005~0.221ms/ks,As未检出~1.210mg/kg,Pb0.4~1.6ms/ks,CA未检出~0.33me/ks,Cu0.1~6.4mg/kg,Cr0.02~0.49mg/kg,六六六未检出。0.041mg/kg和DDT为0.002~0.022mg/kg.参照《无公害食品有毒有害物质限量》标准发现,深圳市场水产品中超标项主要有Pb和As,所有的样品中只有红衫、罗非鱼和鱿鱼完全符合评价标准,可放心食用.另外,该市场水产品中的重金属残留量除Hg和As外,均呈软体动物、甲壳类〉鱼类。 相似文献
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目的 探讨有机氯农药硫丹对长爪沙鼠血细胞免疫功能相关因子的影响。方法将50只长爪沙鼠随机分成5组,各组动物所用硫丹灌胃的剂量依次为:0mg/(kg·d)、0.4mg/(kg·d)、0.8mg/(kg·d)、1.6mg/(kg·d)和6.4mg//(kg·d)。灌胃21d后,取血检测血细胞免疫功能相关因子的表达。结果药物处理后,红细胞表面CD59因子和B淋巴细胞表面CD35因子的表达量在各实验组和对照组间没有明显差异(P〉0.05)。红细胞膜表面CD58因子随硫丹浓度的升高显著下降,0.8mg,/(kg·d)、1.6mg/(kg·d)和6.4/mg/(kg·d)组较对照组有显著降低(P〈0.05)。结论硫丹能抑制长爪沙鼠红细胞膜表面CD58因子表达,但对红细胞膜表面CD59和B细胞表面的CD35的表达没有影响。 相似文献
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青海省饲料原料卫生指标铅、镉的检测 总被引:2,自引:1,他引:1
对青海省饲料企业饲料原料的卫生指标铅、镉含量的抽样检测结果:谷实类原料铅、镉的含量分别在0.003~0.006mg/kg、0.016~0.025mg/kg范围内;豆类籽实原料铅、镉的含量分别为0.005~0.021mg/kg、0.006mg/kg;矿物质中铅、镉的含量分别在0.001~0.011mg/kg、0.019~0.114rng/kg范围内。所测样品中铅、镉的含量均在国家标准饲料卫生指标规定的范围内。 相似文献
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凤仙花茎段培养与快速繁殖 总被引:2,自引:0,他引:2
试验以茎段为外植体,进行凤仙花离体再生与快速繁殖技术研究.结果表明:在附加BA1.0mg/L、NAA0.2mg/L、3%蔗糖的MS固体培养基上可诱导茎段外植体直接产生大量不定芽,诱导率达100%;在含BA1.0mg/L、N从0.2mg/L、3%蔗糖的MS培养基上进行继代培养,可大量增殖;在含NAA、1.0mg/L。3%蔗糖的1/2MS培养基中长根成苗.本试验表明风仙花离体繁殖,增殖系数大,适合于种苗快速繁殖. 相似文献
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Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness. 相似文献
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Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly. 相似文献
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理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。 相似文献
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As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death. 相似文献
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Miao Maosheng 《华南师范大学学报(自然科学版)》2014,(6)
正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula- 相似文献
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Yang Weitao 《华南师范大学学报(自然科学版)》2014,46(6):137-138
We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re- 相似文献
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Bernard Kirtman 《华南师范大学学报(自然科学版)》2014,(6)
正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that 相似文献
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Michael Springborg 《华南师范大学学报(自然科学版)》2014,(6):136
For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the 相似文献
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《上海师范大学学报(自然科学版)》2014,(5):550
<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with 相似文献