全文获取类型
收费全文 | 82篇 |
免费 | 4篇 |
国内免费 | 105篇 |
专业分类
妇产科学 | 2篇 |
基础医学 | 3篇 |
临床医学 | 64篇 |
内科学 | 14篇 |
特种医学 | 2篇 |
外科学 | 6篇 |
综合类 | 25篇 |
药学 | 73篇 |
肿瘤学 | 2篇 |
出版年
2019年 | 1篇 |
2017年 | 1篇 |
2016年 | 1篇 |
2014年 | 1篇 |
2013年 | 2篇 |
2012年 | 1篇 |
2008年 | 3篇 |
2007年 | 63篇 |
2006年 | 9篇 |
2005年 | 15篇 |
2002年 | 5篇 |
2001年 | 11篇 |
2000年 | 4篇 |
1999年 | 3篇 |
1998年 | 7篇 |
1997年 | 6篇 |
1996年 | 2篇 |
1995年 | 2篇 |
1994年 | 4篇 |
1993年 | 8篇 |
1992年 | 15篇 |
1991年 | 3篇 |
1990年 | 7篇 |
1989年 | 6篇 |
1988年 | 10篇 |
1987年 | 1篇 |
排序方式: 共有191条查询结果,搜索用时 15 毫秒
21.
22.
柴胡皂甙q及其甙元的结构鉴定 总被引:4,自引:0,他引:4
从小叶黑柴胡(Bupleurum smithii Wolffvar;parvifolium ShanetY.Li)的根中得到3个化合物,柴胡皂甙元A和Q及柴胡皂甙q。柴胡皂甙元Q和柴胡皂甙q为新化合物,根据理化性质和波谱分析,确定其结构分别为齐墩果烷-11,13(18)-二烯-3β,16β,23,28,30-五醇和3β,16β,23,28,3O-五羟基齐墩果烷-11,13(18)-二烯-3-O-β-D-吡喃葡萄糖基(1→6)-[α-L-吡喃鼠李糖基(1→4)]-β-D-吡喃葡萄糖甙。 相似文献
23.
Rashid Sir Elkhatim Jordan YZ Li Tuck Y Yong 《Expert review of molecular diagnostics》2014,14(4):423-437
Podocyte injury and loss plays an important role in the pathogenesis and progression of many kidney diseases. Studies have shown that podocyte-related markers and products can be detected in the urine of patients with glomerular diseases such as focal segmental glomerulosclerosis, IgA nephropathy, lupus nephritis, diabetic nephropathy and pre-eclampsia. Therefore, detecting the loss of podocytes in the urine provides a useful noninvasive technique of gathering information about the disease type and/or activity of glomerular diseases. Currently, urine podocyte-related protein markers, mRNA, microRNA and exosomes have been used with varying degrees of success to study glomerular diseases. The determination of urinary podocyte loss may become an important noninvasive tool in the evaluation of glomerular diseases. 相似文献
24.
ClinicalstudyofintegratedtraditionalandwesternmedicineinhepatolenticulardegenerationRENMingShan,ZHANGBo,YANGRenMin,HANYong... 相似文献
25.
Associations between both genetic and environmental biomarkers and lung cancer: evidence of a greater risk of lung cancer in women smokers 总被引:3,自引:4,他引:3
Tang DL; Rundle A; Warburton D; Santella RM; Tsai WY; Chiamprasert S; Hsu YZ; Perera FP 《Carcinogenesis》1998,19(11):1949-1953
This molecular epidemiologic case-control study of lung cancer incorporated
three complementary biomarkers: the glutathione S- transferase M1 (GSTM1)
null genotype, a potential marker of susceptibility, and polycyclic
aromatic hydrocarbon-DNA adducts (PAH- DNA) and sister chromatid exchanges
(SCE), both indicators of environmentally induced genetic damage.
Associations between biomarkers and lung cancer were investigated, as were
possible gene-environment interactions between the GSTM1 null genotype and
tobacco smoke exposure. Subjects included 136 primary non-small cell lung
cancer surgical patients and 115 controls at the Columbia Presbyterian
Medical Center. Questionnaire and Tumor Registry data, pre-treatment blood
samples and biomarker measurements on blood were obtained. Overall, GSTM1
null genotype was significantly associated with lung cancer [odds ratio
(OR) = 2.04, 95% confidence interval (CI) = 1.13-3.68]. ORs for GSTM1 and
lung cancer were significant in females (2.50, 1.09-5.72) and smokers
(2.25, 1.11-4.54) and not significant in males (1.4, 0.58-3.38) and
non-smokers (0.88, 0.18-4.33). However, ORs for males versus females and
smokers versus non-smokers did not differ significantly. The OR for GSTM1
and lung cancer in female smokers was 3.03 (1.09- 8.40), compared with 1.42
(0.53-4.06) in male smokers. In contrast to PAH-DNA adducts in leukocytes,
SCE did not differ between cases and controls. Neither biomarker differed
significantly between the two GSTM1 genotypes. The combined effect of
elevated PAH-DNA adducts and GSTM1 genotype on case-control status (16.19,
1.2-115) appeared multiplicative. Results suggest that the effect of the
GSTM1 null genotype is greatest in female smokers, which is consistent with
other evidence that indicates that women are at higher risk of lung cancer
than males, given equal smoking. Persons with both the GSTM1 deletion and
elevated PAH-DNA adducts may represent a sensitive subpopulation with
respect to carcinogens in tobacco smoke and other environmental media.
相似文献
26.
27.
28.
29.
A recurrent idiopathic nonimmune hydrops fetalis case in two subsequent pregnancies was observed in a woman with no child. In both pregnancies, all the detailed analysis, including a high level of ultrasonography, amniocentesis, serologic evaluation, routine blood work, hemoglobin electrophoresis, and glucose 6-phosphate/dehydrogenase level and postdelivery autopsy, was done, and after no clue of etiologic agent, pregnancy termination was applied for both. This case report illustrates the importance of recurrence of nonimmune hydrops fetalis in the absence of any etiology. Mostly, it is hard to establish an etiologic diagnosis for adequate management of subsequent pregnancies. 相似文献
30.
石南藤、山蒟活性成分的分离和结构鉴定 总被引:4,自引:0,他引:4
已报道自山蒟及石南藤中分得海风藤酮(Ⅰ),denudatin B(Ⅱ),N-isobutyl-deca-trans-2-trans-4-dienamide(Ⅲ),本文继续报道自山蒟中分得一新木脂素,命名为山蒟素D(Ⅳ),X-衍射晶体结构测定为外消旋光学异构体。自石南藤分得Ⅳ的同系物,为新结构、命名为南藤素(Ⅴ),以及山蒟素C(Ⅵ),galgravin(Ⅶ),二氢毕拨明宁碱(Ⅷ)及巴豆环氧素(Ⅸ)。以上化合物皆首次自山蒟及石南藤中分得。以血小板活化因子(PAF)引起的血小板凝集实验测定活性,除Ⅲ,Ⅳ,Ⅶ,Ⅸ外皆有抑制活性。 相似文献