全文获取类型
收费全文 | 10623篇 |
免费 | 935篇 |
国内免费 | 88篇 |
专业分类
耳鼻咽喉 | 36篇 |
儿科学 | 100篇 |
妇产科学 | 52篇 |
基础医学 | 895篇 |
口腔科学 | 374篇 |
临床医学 | 313篇 |
内科学 | 502篇 |
皮肤病学 | 6090篇 |
神经病学 | 799篇 |
特种医学 | 111篇 |
外国民族医学 | 1篇 |
外科学 | 316篇 |
综合类 | 371篇 |
现状与发展 | 1篇 |
一般理论 | 1篇 |
预防医学 | 375篇 |
眼科学 | 937篇 |
药学 | 263篇 |
中国医学 | 61篇 |
肿瘤学 | 48篇 |
出版年
2024年 | 10篇 |
2023年 | 114篇 |
2022年 | 125篇 |
2021年 | 334篇 |
2020年 | 284篇 |
2019年 | 235篇 |
2018年 | 322篇 |
2017年 | 311篇 |
2016年 | 327篇 |
2015年 | 322篇 |
2014年 | 388篇 |
2013年 | 421篇 |
2012年 | 329篇 |
2011年 | 351篇 |
2010年 | 295篇 |
2009年 | 401篇 |
2008年 | 398篇 |
2007年 | 408篇 |
2006年 | 344篇 |
2005年 | 318篇 |
2004年 | 323篇 |
2003年 | 327篇 |
2002年 | 284篇 |
2001年 | 354篇 |
2000年 | 180篇 |
1999年 | 284篇 |
1998年 | 356篇 |
1997年 | 278篇 |
1996年 | 329篇 |
1995年 | 305篇 |
1994年 | 277篇 |
1993年 | 263篇 |
1992年 | 250篇 |
1991年 | 249篇 |
1990年 | 205篇 |
1989年 | 235篇 |
1988年 | 237篇 |
1987年 | 150篇 |
1986年 | 117篇 |
1985年 | 124篇 |
1984年 | 101篇 |
1983年 | 75篇 |
1982年 | 63篇 |
1981年 | 46篇 |
1980年 | 52篇 |
1979年 | 20篇 |
1978年 | 30篇 |
1977年 | 25篇 |
1976年 | 27篇 |
1975年 | 34篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
Immunologic contact urticaria to fish 总被引:1,自引:0,他引:1
13.
Occupational airborne allergic contact dermatitis from tylosin 总被引:2,自引:1,他引:1
14.
15.
接触镜与泪液形态关系的临床评价 总被引:1,自引:0,他引:1
目的 :观察配戴不同种类接触镜后眼表面泪膜的形态、稳定性及泪液量的变化。方法 :对日戴SCL、RGPCL和Ortho KCL的 2 14名近视患者 4 2 8只眼 ,利用表面泪膜观察装置 (DR 1)观察戴镜前后眼表泪液膜和戴镜状态下镜上泪液膜的形态分级 ,同时测定泪膜破裂时间 (BUT)。利用酚红染色棉丝测定SCL戴镜前后的泪液量 ,并用折射仪 (AtagoCL 1)测量SCL含水量的变化。结果 :SCL配戴者随戴镜时间延长 ,BUT明显缩短 (P <0 .0 1) ,RGPCL和Ortho KCL配戴者戴镜 5年以内 ,BUT无明显变化 (P >0 .0 5 )。戴镜后RGPCL ,Ortho KCL和非戴镜正常眼三组间眼表泪膜分级比例差异无显著性 ,SCL组Ⅰ级比例为 6 .5 % ,显著低于其他组(16 .1%~ 2 3.0 % )。镜上泪膜 ,SCL、RGPCL和Ortho KCL三组均以Ⅳ级为主 (分别占 5 4 .4 %、5 3.4 %和 5 1.5 % ) ,SCLⅠ级比例仅 1.9% ,显著低于另二组 (分别占 6 .2 %和 12 .4 % )。SCL配戴者随戴镜时间延长 ,泪液量轻度减少 ,SCL含水量在戴镜 1w后即显著降低。结论 :科学配戴接触镜对泪液膜质量无明显影响 ,但SCL长期使用可能对泪膜有一定干扰作用。 相似文献
16.
目的 :探讨起搏器高度依赖性患者起搏器置换方法与疗效。 方法 :对 8例起搏器高度依赖性患者 ,在起搏器与电极的接口松解前 ,应用在体起搏器间断接触法 ,使自身逸搏心律得已恢复 ,然后再行松解接口以及必要的起搏参数测试。 结果 :起搏器离体次数为 3~ 7(5± 2 )次 ,最长逸搏间期为 3.38~ 6 .2 0 (4.5 1± 1.11)s,自身逸搏心率为 30~ 4 3(38± 5 )次 /min ,均顺利完成起搏器置换。 结论 :在体起搏器间断接触法切实可行 ,能够明显提高起搏器高度依赖性患者起搏器置换的安全性 相似文献
17.
Contact sensitivity to aluminium acetate eardrops 总被引:1,自引:0,他引:1
18.
Modulation of cytokine production from an EpiOcular corneal cell culture model in response to Staphylococcus aureus superantigen 总被引:3,自引:0,他引:3
A Thakur PhD A Clegg MSc A Chauhan MSc MDP Willcox PhD 《Clinical & experimental ophthalmology》1997,25(4):43-45
The present study investigated the hypothesis that Staphylococcus aureus enterotoxin B (SEE) produces epithelial cell death and releases inflammatory cytokines that produce stromal infiltration during contact lens induced peripheral ulceration. Epithelial cells were incubated with different doses of SEB for various time periods. Culture supernatants were assayed for cytokines IL- lo, IL-6 and chemotactic agents IL-8 and LTB,. SEE induced the production of IL- I p and IL-8. Epithelial cells exposed for longer periods (48 h) with low concentrations of SEB produced significantly higher levels (N0.02) of IL-Ip and IL-8 (P<0.05) compared t o a 24 h exposure. SEB did not induce the production o f IL-6 and 相似文献
19.
Contact urticaria from protein hydrolysates in hair conditioners 总被引:1,自引:0,他引:1
Protein hydrolysates (PHs) are added to hair-care products (to "repair" broken hair), soaps, bath gels, creams, etc. From one to 22 PHs used in hair-care products (collagen, keratin, elastin, milk, wheat, almond, and silk) were tested in three patient groups: A) 11 hairdressers with hand dermatitis B) 2160 consecutive adults with suspected allergic respiratory disease subjected to routine skin prick tests C) 28 adults with atopic dermatitis.
In group A, all the 22 PHs were tested with scratch and patch tests. In groups B and C, one to three PHs were tested with prick tests. Positive scratch/prick test reactions were seen in 12 patients from three PHs altogether. All were women with atopic dermatitis, and all reacted to at least hydroxypropyl trimonium hydroly:ed collagen (Crotein Q"). In three patients, prick and open tests with a hair conditioner containing Crotein Q were performed with positive results. One patient reported contact urticaria on her hands, and two reported acute urticaria on their head, face, and upper body from a hair conditioner containing Crotein Q. In seven of the eight studied sera, specific IgE to Crotein Q was detected. In conclusion, PHs of hair cosmetics can cause contact urticaria, especially in patients with atopic dermatitis. 相似文献
In group A, all the 22 PHs were tested with scratch and patch tests. In groups B and C, one to three PHs were tested with prick tests. Positive scratch/prick test reactions were seen in 12 patients from three PHs altogether. All were women with atopic dermatitis, and all reacted to at least hydroxypropyl trimonium hydroly:ed collagen (Crotein Q"). In three patients, prick and open tests with a hair conditioner containing Crotein Q were performed with positive results. One patient reported contact urticaria on her hands, and two reported acute urticaria on their head, face, and upper body from a hair conditioner containing Crotein Q. In seven of the eight studied sera, specific IgE to Crotein Q was detected. In conclusion, PHs of hair cosmetics can cause contact urticaria, especially in patients with atopic dermatitis. 相似文献
20.