首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   63篇
  国内免费   25篇
  完全免费   2篇
  综合类   90篇
  2011年   1篇
  2006年   4篇
  2005年   4篇
  2003年   1篇
  2001年   7篇
  2000年   3篇
  1999年   10篇
  1998年   7篇
  1997年   3篇
  1992年   4篇
  1991年   7篇
  1990年   3篇
  1989年   6篇
  1988年   5篇
  1987年   5篇
  1986年   4篇
  1985年   3篇
  1984年   2篇
  1983年   2篇
  1982年   3篇
  1981年   1篇
  1980年   2篇
  1979年   2篇
  1965年   1篇
排序方式: 共有90条查询结果,搜索用时 62 毫秒
1.
反复自然流产的免疫流行病学研究   总被引:29,自引:0,他引:29  
目的分析反复自然流产(RSA)的免疫病因组成。方法用间接血凝法检测ABO血型抗体,用BA-ELISA法检测透明带抗体,用ELISA法检测磷脂抗体,以单向混合淋巴细胞反应封闭试验检测封闭效率,通过补体依赖性细胞毒试验测定细胞毒指数,通过单向混合淋巴细胞反应封闭抑制试验分析封闭抗体的抗独特型抗体,利用流式细胞仪分析封闭抗体对CD抗原的作用。以正常生育组为对照,回顾性分析了129例原发性RSA及16例继发性RSA的免疫病因构成。结果在RSA病因组成中,封闭抗体缺乏占31.7%,透明带自身抗体占20.4%,磷脂抗体占12.5%,ABO血型抗体占11.5%;在原发性流产病因组成中,封闭抗体缺乏占31.4%,透明带自身抗体占20.4%,磷脂抗体占8.5%,ABO血型抗体占8.4%;在继发性流产中,封闭抗体独特型-抗独特型网络失调占39.4%,磷脂抗体占31.4%,ABO血型抗体占22.4%。结论根据RSA免疫流行病学分析,RSA的病因可以分类为:母-胎免疫识别低下型、母-胎免疫识别过度型及母-胎免疫识别紊乱型。  相似文献
2.
对103例慢性前列腺炎应用单克隆抗体免疫荧光法和分离培养法检测其前列腺液中沙眼衣原体(CT)和解脲支原体(UU)。结果表明,患者前列腺液CT检测阳性率为28.4%,UU阳性率为33%,均为非细菌性前列腺为。对照组前列腺液中CT和UU检测均为阴性,结果提示,CT和UU是慢性非细菌怀前列腺炎的病原体。  相似文献
3.
目的 观察干扰素α对大鼠纤维化时星状细胞增殖,I,Ⅲ型前胶原mRNA表达和肝脏胶原沉积的影响。方法 以CCl4制造肝纤维化模型,培养肝星状细胞,抽提RNA,用地高辛标记I,Ⅲ型前胶原和胶原酶cDnA探针,Northern杂交分析I,Ⅲ型前胶原和胶原酶mRNA表达,Dotblot测定大鼠肝I,Ⅲ型胶原沉积,分别用^3H-TdR和^3H-脯氨酸掺入观察干扰素α对星状细胞增殖和胶原合成的影响。结果 干扰  相似文献
4.
Ninety cases of infertility and habitual abortion were analyzed by hysteroscopy between April 1983 and July 1990 in PUMC hospital. Abnormal changes of the uterine cavity were seen in 74.4%. The result of hysterosalpingography corresponded with that of hysteroscopy in 62.5%, and the result of B-ultrasound corresponded to that of hysteroscopy in 52.5%. The diagnosis of adhesion and polyps of the uterine cavity was made accurately by hysteroscopy, and both could be operated under hysteroscopy. After operative removal of the adhesion, an IUD should be put into the uterine cavity for 3 months. In 60 cases operations were performed during or after hysteroscopy. Of the 45 patients followed, 19 achieved pregnancy. Five patients achieved pregnancy after operative removal of the adhesion. It is concluded that hysteroscopy is more important than B-ultrasound and hysterosalpingography in the examination and treatment of infertility.  相似文献
5.
InductionofantiDNAantibodiesbyimmunizationwithactivatedlymphocytesandactivechromatinLuLin卢琳,LiJinzhu李金柱,WangMeiying王美英andWuH...  相似文献
6.
中国人不同年龄和性别正常人心电图QRS波   总被引:6,自引:0,他引:6  
目的:建立中国人不同年龄和性别正常心电图QRS波标准。方法:4322例自出生至85岁不同年龄和性别健康人14导联心电图QRS波,分11个年龄组进行分析统计。结果:QRS波振幅及心电轴均有明显的年龄和性别差异。QRS波振幅随年龄的增减女性出现早于男性。新生儿阶段,QRS波振幅女婴〉男婴,青春期及中年人男性〉女性,婴幼儿及老年人笥别差异相对不明显。  相似文献
7.
Crocidolite was found to be ubiquitous in a county in southwestern China. It had been widely used in the making of road pavement, stoves, wall paint, etc. The environmental levels of the asbestos fibers were determined. Of the 2175 local residents examined, 16 had asbestosis and 232 had pleural plaques. These clinical manifestations were noted mainly in patients over 50 years of age.  相似文献
8.
Sex differences in cardiac catheterization: the role of physician gender.   总被引:3,自引:1,他引:2  
CONTEXT: Many studies indicate that women are less likely than men to undergo cardiac procedures after an acute myocardial infarction (AMI), raising concerns of sexual bias in clinical care. However, no data exist regarding the relationship between patient sex, physician sex, and use of cardiac procedures. OBJECTIVE: To determine whether sex differences in cardiac catheterization after AMI were greater when patients were treated by male attending physicians compared with female attending physicians. DESIGN, SETTING, AND PATIENTS: Analysis of data from the Cooperative Cardiovascular Project, a retrospective medical record review. A total of 104 >231 Medicare fee-for-service beneficiaries who were hospitalized in US acute care hospitals for an AMI between January 1994 and February 1995. MAIN OUTCOME MEASURE: Use of cardiac catheterization within 60 days of admission, compared between the 4 groups of patient sex-physician sex combinations. RESULTS: Women underwent fewer cardiac catheterizations than men when treated by either male physicians (38.6% vs 50.8%; P =.001) or female physicians (34.8% vs 45.8%; P =.001). Sex differences in procedure use were not greater when a patient and physician were of different sexes (P for interaction =.85). After potential confounders in multivariable analysis were accounted for, women were less likely to undergo cardiac catheterization (risk ratio, 0.90 [95% confidence interval (CI), 0.88-0.92]), regardless of the treating physician's sex. Patients treated by male physicians were more likely to undergo cardiac catheterization (risk ratio, 1.06 [95%CI, 1.02-1.10]) than those treated by female physicians, regardless of patient sex. CONCLUSIONS: Women who have had an AMI undergo a cardiac catheterization less often than men, whether treated by a male or female physician. These results suggest that factors other than sexual bias by male physicians toward women account for sex differences in cardiac procedure use.  相似文献
9.
人类巨细胞病地人胚肺细胞HOX基因表达的影响   总被引:3,自引:1,他引:2  
应用半定量RT-PCR技术研究人胚肺(HEL)细胞HOX基因的表达状态及人类巨细胞病毒(HCMV)对HEL细胞HOX基因表达的影响。结果发现:HEL细胞表达HOXB7基因;HCMV感染后,其表达上调;用全反式维甲酸(ATRA)处理HEL细胞,HCMV对HOXB7基因表达的上调作用更强。提示HCMV可能通过影响HOXB7基因的表达导致胚胎发育畸形。  相似文献
10.
正常人心电图T波振幅及其与年龄,性别和种族的关系   总被引:3,自引:0,他引:3  
对4322例从出生至85岁健康人心电力进行分组统计分析,以建立国人心电力产T波振幅的诊断标准。结果表明,各导联正常T波振幅和T/R值的P97.5值〉T-x+1.96s值;男性〉女性,T波振幅与年龄呈中度或高度相关。老年人心电图振幅队V1导联为美国人〉中国人外,其余导联均为中国人〉美国人。研究提示,应根据不同年龄和性别建立国人心电图诊断标准。由于T波振幅常呈轻度正偏态分布,故确定其95%区间上下限值  相似文献
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号