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1.
高丽参口服液急性毒性实验,小鼠经灌胃给药最大耐受量为30g/kg体重,腹腔注射给药的LD50为(129±1.5)g/kg体重,大鼠长期毒性实验分别灌胃给药4.0g/kg、2.0g/kg和1.0g/kg体重,对照组给予等容积蒸馏水,连续4周,各组无动物死亡,各项指标检查正常,病理报告高剂量组有3只动物部分肝细胞胞浆疏松化和气球样变性,中、低剂量组无明显改变,高剂量组存活动物于停药10d后,病理检查正常.  相似文献   

2.
槟榔花口服液的急性及长期毒性研究   总被引:1,自引:0,他引:1  
槟榔花口服液急性毒性实验,4、鼠灌胃给药的LD_(50)为(18.87±4.3)g/kg体重,皮下给药的LD_(50)为(9.76±1.7)g/kg体重,大鼠长期毒性实验分别灌胃给药2.66g/kg,5.33g/kg和10.65g/kg体重,对照组给予等容积的蒸馏水,连续2周,各组无动物死亡,各项血指标检查正常。病理报告高剂量组有3只动物少量肝细胞可见脂肪空泡,1只大鼠肺脏轻度灶性肺炎,中低剂量组无明显改变。高剂量组存活动物于停药7天后,病理检查均正常。  相似文献   

3.
傅军 《今日科技》2000,(8):34-35
一、材料与方法1.对象普通及新西兰纯种兔26只,由浙江省实验动物中心提供及饲养.雌雄不拘。年龄3~4个月。无人畜共患疾病。免随机分入阿霉素组(ADR组)、对照组(NS组)和阿霉素加牛磺酸组(Tau组)。ADR组9只,体重1.60~1.95kg(1.74kg±0.12kg),ADR用生理盐水配制成lmg/ml,于耳缘静脉注射ADR每次2mg/kg,每周1次,共8次。对照组9只,体重l.60~2.05kg(1.79kg±0.14kg),于耳缘静脉注射生理盐水每次2ml/kg,每周1次,共8次。Tau…  相似文献   

4.
目的:研究得普利麻在硬膜外麻醉时两种给药方法的血药浓度变化和临床效应。方法:将28例连续硬膜我麻醉下行上腹部手术患分为两组。第1组采用常规给药法:诱导量1.5/(kg.min),3min后开始维持量3mg/(kg.h);第2组以0.15mg/(kg.min)速度共6min诱导,随即用与第1组相同维持量。两组诱导时均辅以芬太尼0.1μg/kg。测定给药前及给药后1、3、6、10、20、30min血  相似文献   

5.
一种日常快速分析食物中毒样品中有机磷农药的方法   总被引:1,自引:0,他引:1  
采用0.53mm宽口径毛细管柱,在带氮磷检测器(NPD)的气相色谱上一次快速测定多种有机磷(OP)农药,结果表明,当添加OP农药水平在0.12mg/kg-0.70mg/kg时,7种OP农药的回收率范围为78.8%-101.2%,变异系数3.4%-8.2%,方法检测限达1.1μg/kg-6.3μg/kg。无水硫酸钠对提高OP农药以提取过程中的回收率有重要作用。  相似文献   

6.
在以累计剂量为10.95g生药/kg(60kg人按体重计用药量的109.5倍)阴道用药的急性毒性试验中、大鼠未出现异常反应和死亡,未见阴道粘膜充血、水肿和明显病理改变;一次与多次用药均未见阴道粘膜充血、水肿和明显病理改变;在连续用药3周(为临床拟用药疗程1周的3倍)的长期毒性试验中,其高剂量为4.38g生药/kg(60kg人按体重计用药量的43.8倍)、低剂量为2.19g/kg,受试大鼠体重增长一  相似文献   

7.
拓扑特肯体内外抗肿瘤作用的研究   总被引:1,自引:0,他引:1  
测定了拓扑特肯对5种体外培养人肿瘤细胞株的生长抑制作用及对小鼠移植性肿瘤的抑制作用。结果显示拓扑特肯对各体外肿瘤细胞都有明显的细胞毒作用,除了人胃癌BGC-803的IC50为3.87μg/mL外,对其它瘤株的IC50均小于0.1μg/mL。在1.0mg/kg,2.0mg/kg剂量下,拓扑特肯对小鼠肉瘤S180的抑制率分别为32.0%、33.8%;对小鼠肝癌H22的抑制率分别为31.4%、42.1%  相似文献   

8.
富硒灵芝的研究   总被引:9,自引:1,他引:9  
研究了富硒灵芝培育的条件,结果表明,培养基pH值、硫素营养和硒素营养对灵芝富硒有显著影响.pH值3.0~5.0,硫浓度1500mg/kg以下,硒浓度50~300mg/kg的棉籽壳培养基适合培养硒含量20~124μg/g,有机硒占85%的富硒灵芝.  相似文献   

9.
葫芦巴种子多糖对糖尿病大鼠血糖的动态影响   总被引:4,自引:0,他引:4  
用四氧嘧啶(aloxan)引发S.D大鼠糖尿病模型,饲喂不同剂量葫芦巴种子提取物(FSP1),测定饲喂后不同时间(t)的空腹血糖浓度(G),建立G-t函数关系,结合各组死亡率,降糖速率及统计检验,得出如下结论:4.5g/kg体重剂量有极明显的降糖作用,对正常鼠无致毒性,其血糖下降速率随时间变小,表明可能存在受血糖浓度制约的FSP1降糖效果的负反馈调节;0.9g/kg剂量也有较明显的降糖作用,但理论时效较长;0.18g/kg剂量则无实际治疗意义  相似文献   

10.
我们以前的实验表明925合剂组方有抑制EB病毒EA表达和抑制体外鼻咽癌细胞生长的作用。本实验用裸鼠移植人鼻咽癌(SUNT-1)检测925合剂的抗肿瘤作用,实验表明灌服925-1,在12.5g生药/kg剂量下抑瘤率为35.6%;在33g生药/kg剂量下抑瘤率36.4%和52.1%;灌服925-2在25g生药/kg剂量下抑瘤率50.5%;灌服925-3在20g生药/kg剂量下抑瘤率34%。  相似文献   

11.
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   

12.
何延凌 《科技信息》2008,(4):258-258
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   

13.
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   

14.
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   

15.
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   

16.
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   

17.
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   

18.
<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   

19.
20.
<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has  相似文献   

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