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1.
本文探讨双羟萘酸噻嘧啶治疗蛲虫病的效果。试治结果表明,单剂疗法的治疗效果不佳,其治愈率仅为63.6%;对未治愈者采用双剂疗法,经复查发现,治愈率虽有提高,累计治愈率达87.27%,但与丙硫咪唑相比,疗效并不理想。作者认为,噻嘧啶已不宜选作驱蛲虫用药。近年来国内外大量研究资料证实,丙硫咪唑是一种疗效高、副反应小、服法简便、价格低廉的广谱抗蠕虫剂,应作为治疗蛲虫病的首选药。  相似文献   

2.
1990年7月—1991年7月应用丙硫咪唑治疗猪人工感染细颈囊尾病获得成功,这在国内尚属首次。在多种剂型、剂量和投药方法对比试验中,以粉剂90mg/kg,三次口服疗效最好,驱(杀)虫率为99.44—100%,投药方便无副作用。治疗后6—13天蚴虫死亡,死虫14—25天干酪化,外膜上有一薄层纤维膜。26—60天干酪化、纤维化。177天吸收较好。丙硫咪唑是广谱驱虫药且价格较低,是目前治疗猪细颈囊尾蚴病(感染)较理想的药物。该研究为治疗猪细颈囊尾蚴病(感染)提供了科学依据。  相似文献   

3.
用透明胶纸拭擦法调查了吉林市幼儿园蛲虫卵的分布情况,共查幼儿112人,肛周污染率为26.78%,女孩会阴部污染率为13.30%,手指污染率为12.35%,于内衣裤、被褥单及尘土里检获蛲虫卵。讨论了蛲虫病防治的关键是治疗后的再感染及虫卵污染,还介绍了几种卫生消毒措施。  相似文献   

4.
蛲虫是一种常见的肠寄生虫,尤以儿童感染为多,因为蛲虫感染多半并不引起较严重的后果,所以常为人所忽视。早在1953年,吴氏曾发现一女性患者因蛲虫移行而致慢性输卵管炎,此后对此病的各方面研究做的很少。关于蛲虫感染情况,在解放前仅秦、张二氏在成都曾应用玻璃纸拭法检查了部分学童。解放后,由于各地医务工作者响应了人民政府的正确卫生方针和政策,以及对儿童们健康的关怀,蛲虫病曾在天津、镇江、西安及长沙等地区做过调查,其感染率为43.8%,22.76%,49.51%,及55.1%。由此可见我国儿童蛲虫感染的普遍性。作者等为了了解青岛市儿童蛲虫感染清况,应用纤维  相似文献   

5.
本文报告1964—1980年对哈尔滨市区及郊县农村儿童肠道线虫感染情况的几次调查结果。用胶玻纸拭法检查一次,幼儿园儿童和中小学生的蛲虫总阳性率为52.50%,农村小学生的蛔虫感染率为78.07%。中学生蛔虫感染率60.0%。市区先后两次蛲虫感染情况调查时间相隔16年,感染率未见明显差别,似说明此虫感染率如不采取防治措施并不随生活水平提高而自然下降。蛔虫感染则不同,14年后调查一郊县农村小学,学生蛔虫感染率明显降低。市区某校小学生蛔虫感染率20.83%。城乡儿童蛲虫感染率差别不明显,年龄以4—15岁感染率较高,男女两性感染率无显著差异。农村学生蛔虫感染有随年龄增加而感染率下降的趋势,女中学生较男中学生感染率高。几次调查只发现鞭虫感染两例。用药驱蛔,该市农村小学生排虫者多数每人排虫1—5条,平均每人排虫7.4条。肛拭前受检者大便已否对蛲虫检查结果似无重大影响。  相似文献   

6.
在青南牧区应用阿维菌素、丙硫咪唑对放牧绵羊进行冬季(1-2月)一次投药后的防治效果进行监测。结果:阿维菌素、丙硫咪唑投药羊与末投药羊比较,绵羊胃肠道线虫卵平均EPG分别低43.34%和67.31%;肺线虫幼虫分别低74.27%和90.57%。证明二种药物均能在较长时间内保持绵养体内低荷虫量,能有效阻止线虫春季高潮,减少春乏死亡。  相似文献   

7.
通过建立鞍山市历年工业总产值全数据的灰色模型,较准确地预测出鞍山市1990年的工业总产值,其预测误差为10.99%.在1989年总产值的邻域系上建立了灰色模型簇。通过比较簇中各灰色模型的平均误差及原点误差,筛选出最优灰色模型。为进一步提高该模型的精度,又以残差数列建立灰色模型对该模型进行修正。修正后预测出1990年的工业总产值的预测误差仅为4.14%,这表明,在灰色模型簇中筛选最优预测模型,并在此基础上建立被残差修正后的灰色预测模型,从而提高灰色模型的预测精度。  相似文献   

8.
未来世界农业面临的形势 世界农业生产自80年代中期以来增长缓慢.1987年增长率为0.9%,1988年仅为0.1%.1989年略有回升.增长3.2%,1990年世界粮食和农业产量的增长率为2%.1991年低于上一年的水平。总的来说.发展中国家的农业产量增长率快于发达国家.其在世界总产量中所占的比例有所增加.由1979~1981年占46%.到1988~1990年  相似文献   

9.
1991年~1994年对吉林市某幼儿园蛲虫感染进行4年连续观察。共查幼儿563人,阳性75人,总感染率为13.32%, 1991年感染率为26.78%, 1992年为13.76%,1993年为8.94%,1994年为8.33%,各年感染率之间有极显著性差异(x~2=24.03 P<0.001),呈逐年下降趋势。  相似文献   

10.
应用透明胶纸肛周粘贴法,对武汉市青山区六所幼儿园2031名幼儿进行了蛲虫感染情况调查,总感染率为8.76%,其中男性感染率为10.99%,女性感染率为6.52%,对其中一所幼儿园每次检出感染者采用连续3a,每年2次口服肠虫清(200mg/(人.次))的方法进行防江并观察效果,三年的感染率逐年下降,分别为9.29%,7.02%和6.41%,这表明,对蛲虫感染者进行服药防治,有一定的疗效。  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.
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   

13.
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   

14.
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   

15.
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   

16.
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   

17.
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   

18.
Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of  相似文献   

19.
<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   

20.
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