全文获取类型
收费全文 | 8877篇 |
免费 | 939篇 |
国内免费 | 200篇 |
专业分类
耳鼻咽喉 | 42篇 |
儿科学 | 52篇 |
妇产科学 | 23篇 |
基础医学 | 1265篇 |
口腔科学 | 213篇 |
临床医学 | 957篇 |
内科学 | 2003篇 |
皮肤病学 | 80篇 |
神经病学 | 1339篇 |
特种医学 | 255篇 |
外国民族医学 | 1篇 |
外科学 | 581篇 |
综合类 | 1003篇 |
现状与发展 | 1篇 |
预防医学 | 719篇 |
眼科学 | 86篇 |
药学 | 1056篇 |
10篇 | |
中国医学 | 225篇 |
肿瘤学 | 105篇 |
出版年
2024年 | 16篇 |
2023年 | 141篇 |
2022年 | 166篇 |
2021年 | 468篇 |
2020年 | 400篇 |
2019年 | 440篇 |
2018年 | 364篇 |
2017年 | 313篇 |
2016年 | 299篇 |
2015年 | 273篇 |
2014年 | 462篇 |
2013年 | 522篇 |
2012年 | 417篇 |
2011年 | 459篇 |
2010年 | 404篇 |
2009年 | 354篇 |
2008年 | 393篇 |
2007年 | 388篇 |
2006年 | 334篇 |
2005年 | 309篇 |
2004年 | 317篇 |
2003年 | 261篇 |
2002年 | 213篇 |
2001年 | 185篇 |
2000年 | 177篇 |
1999年 | 179篇 |
1998年 | 187篇 |
1997年 | 191篇 |
1996年 | 134篇 |
1995年 | 140篇 |
1994年 | 143篇 |
1993年 | 115篇 |
1992年 | 93篇 |
1991年 | 90篇 |
1990年 | 76篇 |
1989年 | 57篇 |
1988年 | 72篇 |
1987年 | 54篇 |
1986年 | 48篇 |
1985年 | 65篇 |
1984年 | 43篇 |
1983年 | 36篇 |
1982年 | 45篇 |
1981年 | 40篇 |
1980年 | 31篇 |
1979年 | 29篇 |
1978年 | 17篇 |
1977年 | 14篇 |
1976年 | 17篇 |
1975年 | 9篇 |
排序方式: 共有10000条查询结果,搜索用时 343 毫秒
31.
32.
单向中频电加助透液防治瘢痕增生 总被引:6,自引:0,他引:6
为防治瘢痕增生,寻求有效治疗方法,我们采用单向中频电加助透液治疗瘢痕增生患者33例,痊愈显效率为64%,总有效率为88%。结果表明,单向中频电加助透液能增强导入作用,是防治瘢痕增生的有效方法。 相似文献
33.
目的 观察直接PTCA对急性心肌梗死 (AMI)患者QT离散度 (QTd)及QTc离散度 (QTcd)的影响。方法 对 30例AMI患者行直接PTCA ,使病变血管血流达到TIMI血流 3级 ,于PTCA术前、术后 2h、4 8h作同步 12导心电图并测量QTd及QTcd ,然后与 30例正常人对照。结果 AMI组与正常对照组间QTd及QTcd有极显著差异 (P <0 .0 1)。有室性心律失常的AMI患者其QTd和QTcd高于无室性心律失常患者 ,但差异无显著性(P >0 .0 5 ) ,PTCA术后其QTd和QTcd下降 (P <0 .0 1) ,室性心律失常好转。结论 成功的直接PTCA可降低AMI患者的QTd和QTcd ,减少室性心律失常的发生 ,改善预后 相似文献
34.
35.
目的研究不同月龄的雄性大鼠成骨细胞内钙浓度及钙通道电流是否存在差异.方法采用二次酶消化法分离不同月龄(分别为1、2、3、5、7、9、11、13、15)雄性大鼠的原代成骨细胞,通过激光扫描共聚焦技术测定细胞内游离钙浓度([Ca2+]i)(以平均荧光强度表示),同时应用全细胞膜片钳技术记录成骨细胞膜钙电流(ICa)的变化.结果共聚焦结果显示随月龄增加,成骨细胞内[Ca2+]i逐渐降低,但相邻2月龄组之间细胞内[Ca2+]i无显著性差异(P>0.05);1、2、3月龄组与11、13、15月龄组成骨细胞内[Ca2+]i有显著性差异(P<0.05),5、7、9月龄组与各组相比均无差异(P>0.05).应用全细胞膜片钳技术发现刺激电压为+10 mV时,2、7、13月龄组鼠ICa分别为(-392.77±97.07)pA、(-330.33±33.86)pA和(-287.68±71.01)pA,13月龄组鼠与2月龄组鼠相比,ICa明显降低(P<0.05),而7月龄组鼠与2月龄组鼠和13月龄组鼠相比,ICa均没有明显差异(P>0.05).结论不同月龄大鼠成骨细胞内[Ca2+]i存在差异,其机制可能与细胞膜上钙通道活性改变相关. 相似文献
36.
The acromioclavicular joint is a potential source of pain in the shoulder. There are a variety of disorders that can affect this joint, including distal clavicle osteolysis, posttraumatic arthritis, osteoarthritis, and rheumatoid arthritis. Nonoperative treatment for this condition with nonsteroidal medication and activity modification can alleviate the pain. When conservative treatment is exhausted, surgical resection of the distal clavicle is often necessary. Arthroscopic resection of the distal clavicle preserves the acromioclavicular ligaments to prevent postoperative distal clavicle instability. The procedure is performed in either the beach chair or lateral position and requires the use of a shaver, electrocautery, and a burr for soft tissue and debridement and bone resection. 相似文献
37.
A Comparative Study on the Close Reduction of Arytenoid Dislocation under Indirect and Direct Laryngoscope 总被引:3,自引:0,他引:3
To assess the curative effects of different reduction techniques on the dislocation of cricoarytenoid joint caused by intubation,indirect laryngoscope (IL) and direct laryngoscope (DL) were utilized for the closed reduction of the displaced arytenoid under local anesthesia.23 patients who underwent the reduction for dislocated arytenoid under IL or DL from January 1991 to June 2001 were reviewed.The data were collected on the duration of the laryngeal injury,times of receiving reduction,side-effects after the treatment and the period for voice to returen to normal.The relationship between the duration of the laryngeal lesion and the period of the voice rehabilitation was examined.13 patients received the reduction under IL and 10 patients under DL,Except the times of the reduction,which showed significant difference,no differences were found between IL group and DL group in the course and the period of voice rehabilitation,as well as sore throat after the manipulation.The patients‘ voice recovery was positively related to their course of disease in both IL and DL group.It is coucluded that the recovery of normal voice is obviously affected by the duration of arytenoid dislocation.The reduction under Il is as effective as under DL in the treatment of arytenoid dislocation.Reduction by DL is better suit the patients with long time course of disease. 相似文献
38.
T. N. RAMUTHAGA M. s. BORNMAN M. F. MAHOMED D. BOOMKER A. S. GREEF H. H. CREWE-BROWN S. REIF 《International journal of andrology》1994,17(1):9-12
Swabbing the urethrae of men has been the traditional approach for collecting specimens for detection of Chlamydia trachomatis . Recently, however, urine testing using enzyme immunoassay has yielded promising results. A total of 105 patients attending the Andrology Clinic at Ga Rankuwa Hospital, Medunsa were included in the study. These patients were asymptomatic and had no urethral discharge. Three endo-urethral swabs and first-catch urine were collected fiom each patient. The urethral swabs were used for enzyme immunoassay (EIA) (IDEIA 111), tissue culture and direct immonufluorescent antibody (DFA) test (IMAGEN) to detect C. trachomatis . In addition about 15–30 ml of first-catch urine, or urine collected at least 2h after the previous micturition, was collected for each patient for EIA testing. Fifteen (14.3%) of 105 patients were positive on urethral swab EIA, in comparison with the DFA test in which 14 (13.3%) were positive. Eight (7.8%) were positive in tissue culture. Urine EIA was positive in 17 (16.2%) patients, of whom five (4.8%) were positive in urine EIA only. All EIA positive urines were confirmed by DFA. We recommend that first-catch urine or urine collected at least 2h after the previous micturition in infertile males may be considered a suitable alternative to urethral swab for chlamydial diagnosis because it is noninvasive and nontraumatic. 相似文献
39.
40.
制备了聚乙烯醇 (PVA)与聚苯乙烯磺酸 (PSSA)的共混膜 ,并研究了膜的组成、热处理温度、甲醇水溶液浓度等对膜电导率和甲醇透过率的影响。与目前普遍使用的NafionTM膜相比 ,这种由阻醇材料PVA与离子交换材料PSSA共混后形成的聚合物膜既能提高阻醇性能 ,又具有一定的电导率。一种以聚苯乙烯磺酸含量为 17%的膜 ,其电导率可达 3× 10 -3 S·cm-1,但甲醇透过率P仅为 2× 10 -8cm2 ·s-1。如果以σ/P为综合指标 ,则此膜的综合性能比NafionTM膜高约 4 0倍 相似文献