排序方式: 共有43条查询结果,搜索用时 15 毫秒
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目的 :观察抗抑郁治疗对不稳定型心绞痛伴抑郁患者近期预后的影响。方法 :将 68例不稳定型心绞痛伴抑郁的患者随机分为抗抑郁治疗组和对照组各 34例 ,治疗组在常规药物治疗基础上予心理治疗及加服抗抑郁药氟西汀 (百忧解 ) 2 0 mg/d,顿服 ,疗程为 1 2周。结果 :治疗组与对照组比较 ,心肌缺血明显改善 (P<0 .0 1 ) ,心绞痛复发率及发生急性心肌梗死比例低 (P<0 .0 5)。结论 :抗抑郁治疗能明显改善不稳定型心绞痛伴抑郁患者的近期预后。 相似文献
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Genetic inheritance of resistance to Bacillus thuringiensis var kurstaki (BTK) was examined in a diamondback moth (Plutella xylostella) population collected from the Melaka region of Malaysia. A BTK‐selected sub‐population (BTK‐SEL) which was more than 100‐fold resistant to BTK compared with a susceptible (ROTH) population of P xylostella was used with standard reciprocal crosses and back‐crosses between ROTH and BTK‐SEL. Logit regression analysis of F 1 reciprocal crosses indicated that BTK resistance was inherited as an incompletely recessive autosomal trait and controlled by a single locus. In contrast, other studies have shown that resistance to Cry1Ac is inherited as an incompletely dominant autosomal trait in a Cry1Ac‐selected sub‐population of the same Melaka population. The frequency of the allele responsible for resistance decreased without exposure to insecticide in the laboratory. © 2000 Society of Chemical Industry 相似文献
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根据蒋家沟流域的气候垂直带谱,选取了流域内温带湿润山岭区(TH)、亚热带和暖温带半湿润区(SW)、亚热带干热河谷区(SD)为研究区,分析典型失稳性坡面土壤养分含量、化学计量比的空间分布特征及其与气候和区段的关系。结果表明:研究区土壤C∶N、C∶P和N∶P分别介于10.98~29.43、22.39~38.19和1.74~2.20,TH的C∶N、C∶P显著高于SW、SD,表明良好的水热条件有利于土壤养分积累。土壤C∶N、C∶P与N∶P整体上呈现稳定区 > 失稳区 > 堆积区的变化趋势且三者间差异显著,表明区段显著影响土壤C∶N、C∶P与N∶P;气候因子(温度与降水)显著影响蒋家沟流域的土壤碳氮磷化学计量学特征。因此,水热条件良好的温带湿润山岭区土壤化学计量比(C∶N和C∶P)高于其他两个气候区,亚热带和暖温带半湿润区、亚热带干热河谷区的土壤化学计量比受坡面稳定性影响,总体表现出稳定区 > 失稳区 > 堆积区的区段显著差异趋势。 相似文献
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Guo Yingzhong 《保鲜与加工》1997,(2):87-93
Using basic principles of stereographic projection,block theory and rock mechanics,this paper tries to find a simple and easy method for determination of an optimum scheme for bolting unstable rocks on a rock slope in design of slope engineering.finally, examination and analysis is made of the completed project for bolting the unstable,high and steep rock slope on the campus of Chongqing University. 相似文献
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AIM:To construct a subtracted cDNA library of differentially expressed genes in human unstable angina lymphocytes.METHODS:Suppression subtractive hybridizations (SSH) were performed between the patients with unstable angina pectoris and stable angina pectoris. Lymphocyte RNA, the obtained forward and reverse cDNA fragments were directly inserted into T/A cloning vector and transformed into E.coli JM 109 to construct a subtractive cDNA library. The inserting fragments were screened by blue and while blot screening and bacterium liqulid PCR.RESULTS:Each subtractive cDNA library contained more than 2000 positive bacteria clones. Most of them distributed between 200-600 bp inserts.CONCLUSION:The library is efficient and lays solid foundation for screening and cloning new and specific expressed genes in unstable angina lymphocyte RNA. 相似文献
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为进一步完善经典控制论中的结构图简化规则,深入研究具有不稳定零极点对消的结构图等效问题。指出复杂结构图等效后,如果其等效式与其他环节存在不稳定零极点对消,则对消后系统的性质将发生改变,此时应保持原结构图而不做进一步的简化,仿真示例验证这一结论。 相似文献