全文获取类型
收费全文 | 6117篇 |
免费 | 308篇 |
国内免费 | 33篇 |
专业分类
耳鼻咽喉 | 202篇 |
儿科学 | 339篇 |
妇产科学 | 399篇 |
基础医学 | 471篇 |
口腔科学 | 358篇 |
临床医学 | 561篇 |
内科学 | 1340篇 |
皮肤病学 | 88篇 |
神经病学 | 394篇 |
特种医学 | 264篇 |
外科学 | 980篇 |
综合类 | 122篇 |
一般理论 | 3篇 |
预防医学 | 195篇 |
眼科学 | 178篇 |
药学 | 286篇 |
中国医学 | 12篇 |
肿瘤学 | 266篇 |
出版年
2024年 | 7篇 |
2023年 | 67篇 |
2022年 | 120篇 |
2021年 | 202篇 |
2020年 | 112篇 |
2019年 | 151篇 |
2018年 | 204篇 |
2017年 | 160篇 |
2016年 | 195篇 |
2015年 | 209篇 |
2014年 | 216篇 |
2013年 | 315篇 |
2012年 | 401篇 |
2011年 | 452篇 |
2010年 | 221篇 |
2009年 | 207篇 |
2008年 | 457篇 |
2007年 | 487篇 |
2006年 | 454篇 |
2005年 | 442篇 |
2004年 | 342篇 |
2003年 | 299篇 |
2002年 | 245篇 |
2001年 | 95篇 |
2000年 | 87篇 |
1999年 | 70篇 |
1998年 | 20篇 |
1997年 | 13篇 |
1996年 | 11篇 |
1995年 | 18篇 |
1994年 | 6篇 |
1993年 | 5篇 |
1992年 | 25篇 |
1991年 | 19篇 |
1990年 | 24篇 |
1989年 | 10篇 |
1988年 | 13篇 |
1987年 | 12篇 |
1986年 | 15篇 |
1985年 | 7篇 |
1984年 | 7篇 |
1983年 | 2篇 |
1982年 | 4篇 |
1981年 | 3篇 |
1980年 | 2篇 |
1979年 | 6篇 |
1978年 | 6篇 |
1977年 | 4篇 |
1975年 | 2篇 |
1966年 | 2篇 |
排序方式: 共有6458条查询结果,搜索用时 15 毫秒
1.
2.
Effects of Paclitaxel and Carboplatin Combination on Mechanical Myocardial and Microvascular Functions: A Transthoracic Doppler Echocardiography and Two‐Dimensional Strain Imaging Study 下载免费PDF全文
3.
F. Murina R. Felice S. Di Francesco L. Nelvastellio I. Cetin 《Gynecological endocrinology》2020,36(5):431-435
AbstractThis study is a single-center, retrospective analysis of postmenopausal women presenting with dyspareunia and vulvar pain, aiming to evaluate relative effectiveness of vestibular CO2 laser therapy as a treatment. Three monthly sessions of laser were performed to each patient and thereafter a three-months follow-up was stablished. A total number of 72 patients undergoing vestibular laser treatment were recruited from patient files in the period between 2016 and 2018. Among these, 39 women also received a concomitant treatment with ospemifene (60?mg/day) during the study period. There was a statistically significant reduction of all the symptoms in both groups up to the three month follow-up. Regarding dryness and dyspareunia, the relief tent to be more prominent in the ospemifene?+?laser group at all follow-ups and remained statistically significant at three-month follow-up. Specifically, vestibular dryness was significantly lower in the ospemifene?+?laser group compared with the laser treatment group (?87% vs???34%, respectively), and the vestibular health score started declining faster in the ospemifene?+?laser group. Although, additional research is needed to understand the mechanism of action, our data shows that a combination regimen of laser and ospemifene may improve clinical effectiveness for long-term treatment of symptoms associated with the under-recognized genitourinary syndrome of menopause. 相似文献
4.
Ayhan Ozturk C Elif Ozturk Burcu Ozdemirli Muhterem Yucel Talat Bah?eba?i 《Seizure》2007,16(2):147-152
It is well known that there might be an epidemiological association between Helicobacter pylori infection and extraintestinal diseases. This study aimed at determining H. pylori infection in epileptic patients. Forty-seven cryptogenic epileptic patients (Group 1) and 35 healthy people (Group 2) participated in this study. Presence of H. pylori infection was examined by H. pylori stool antigen (HpSA), H. pylori IgG, and IgM. HpSA was detected in 21 participants (44.6%) in Group 1 and in 3 participants (8.5%) in Group 2. H. pylori IgM was positive in 27 participants (57.4%) in Group 1 and in 8 participants (22.8%) in Group 2. H. pylori IgG was positive in 37 participants (78.7%) in Group 1 and in 13 participants (38%) in Group 2. The difference of rates of HpSA, H. pylori IgM and IgG in Groups 1 and 2 were found statistically significant (chi2=4.18, p=0.04; chi2=9.18, p=0.0017; chi2=14.58, p<0.001, respectively). We also compared presence of H. pylori infection between the epileptic patients with poor and good prognosis; HpSA positivity was detected in 15 (62.5%) of 24 and 6 (26%) of 23, respectively, and the differences were statistically significant (chi2=6.30, p=0.012). H. pylori IgM positivity was detected in 16 (66%) of 24 patients with poor prognosis and 11 (47.8%) of 23 patients with good prognosis (p>0.05). H. pylori IgG positivity was detected in 18 (75%) of 24 patients with poor prognosis and 19 (82.6%) of 23 patients with good prognosis. The differences of H. pylori IgM and IgG positivity rates in epileptic patients with poor and good prognosis were not found statistically significant (p>0.05). These results suggest a probable association between the acute H. pylori infection and epilepsy, especially with poor prognosis. 相似文献
5.
6.
Samet Ozlugedik Muge Ozcan Olca Basturk Orgun Deren Erkan Kaptanoglu G?khan Adanali Adnan Unal 《Skull base》2005,15(4):269-72; discussion 273
Ameloblastic carcinoma (AC) is an aggressive malignant epithelial odontogenic tumor. It may appear de novo or originate from a pre-existing ameloblastoma or odontogenic cyst. To our knowledge, an AC that originates from the anterior skull base has not been reported before in the English literature. We report a case of an AC that originated from the anterior skull base and invaded the dura of the anterior fossa and discuss its clinical course and treatment. 相似文献
7.
8.
When all-ceramic systems are used, a respect for biocompatibility, an understanding of the patient's esthetic demands, and a justifiable reliance on the strength of the selected system are integral to success. Severely damaged molar teeth in two patients were restored with all-ceramic onlays that were prepared with a copy-milling system for ceramics. The onlay patterns were fabricated directly in the mouth with autopolymerizing resin. For these patients, the use of biologic, all-ceramic, copy-milled restorations resulted in clinical success as well as recovered function and esthetics. 相似文献
9.
Effects of human amniotic fluid on cartilage regeneration from free perichondrial grafts in rabbits.
Güzin Ye?im Ozgenel Gülaydan Filiz Mesut Ozcan 《British journal of plastic surgery》2004,57(5):423-428
After the chondrogenic potential of free grafts of perichondrium was shown in several experimental studies, perichondrium has been used to reconstruct cartilage tissue in various clinical situations. This study investigates the effects of human amniotic fluid on neochondrogenesis from free perichondrial grafts in a rabbit model. Since this fluid contains high concentrations of hyaluronic acid, hyaluronic acid-stimulating activator, growth factors, and extracellular matrix precursors during the second trimester, it may have a stimulating effect on neochondrogenesis. Perichondrial grafts, measuring 20 x 20 mm2 were obtained from the ears of 144 New Zealand young rabbits and were sutured over the paravertebral muscles. The rabbits were randomly divided into three groups with 48 rabbits per group. In group 1, 0.3 ml human amniotic fluid, and in group 2, 0.3 ml saline were injected underneath the perichondrial grafts. Group 3 formed the control group in which no treatment was given. Histologically, neochondrogenesis was evaluated in terms of cellular form and graft thickness at 2, 4, 6, and 8 weeks after surgery. In group 1, the mature cartilage was generated quickly and the cartilage plate in this group was significantly thick and extensive when compared with groups 2 and 3 at 8 weeks ( p<0.05 ANOVA). In conclusion, our study shows that human amniotic fluid enhances neochondrogenesis from free perichondrial grafts. The rich content of hyaluronic acid and growth factors possibly participate in this result. 相似文献
10.
Gürkan Cetin Levent Saltik Ahmet Ozkara Kadir Babao?lu 《European journal of cardio-thoracic surgery》2005,27(3):518-519
Ischemic changes and acute or subacute cardiac failure after arterial switch operation generally results from imperfect transfer of coronary arteries to the neoaorta. Peroperative and early postoperative myocardial ischemia is the main cause of death in these patients. We present an unusual cause of myocardial ischemia and cardiac failure after arterial switch: a congenital coronary artery fistula between the circumflex artery and the right ventricle. The symptoms imitate coronary translocation failure. In differential diagnosis of the coronary perfusion problems encountered after the arterial switch operation, coronary artery fistula should not be forgotten, although it is rare. 相似文献