全文获取类型
收费全文 | 15016篇 |
免费 | 770篇 |
国内免费 | 98篇 |
专业分类
耳鼻咽喉 | 135篇 |
儿科学 | 246篇 |
妇产科学 | 241篇 |
基础医学 | 1689篇 |
口腔科学 | 412篇 |
临床医学 | 888篇 |
内科学 | 3808篇 |
皮肤病学 | 249篇 |
神经病学 | 1405篇 |
特种医学 | 619篇 |
外科学 | 2958篇 |
综合类 | 34篇 |
一般理论 | 1篇 |
预防医学 | 394篇 |
眼科学 | 281篇 |
药学 | 819篇 |
中国医学 | 24篇 |
肿瘤学 | 1681篇 |
出版年
2023年 | 106篇 |
2022年 | 195篇 |
2021年 | 327篇 |
2020年 | 193篇 |
2019年 | 238篇 |
2018年 | 349篇 |
2017年 | 253篇 |
2016年 | 297篇 |
2015年 | 326篇 |
2014年 | 417篇 |
2013年 | 508篇 |
2012年 | 894篇 |
2011年 | 985篇 |
2010年 | 563篇 |
2009年 | 468篇 |
2008年 | 847篇 |
2007年 | 937篇 |
2006年 | 853篇 |
2005年 | 826篇 |
2004年 | 750篇 |
2003年 | 735篇 |
2002年 | 694篇 |
2001年 | 387篇 |
2000年 | 352篇 |
1999年 | 361篇 |
1998年 | 191篇 |
1997年 | 144篇 |
1996年 | 135篇 |
1995年 | 104篇 |
1994年 | 111篇 |
1993年 | 85篇 |
1992年 | 218篇 |
1991年 | 204篇 |
1990年 | 171篇 |
1989年 | 184篇 |
1988年 | 176篇 |
1987年 | 166篇 |
1986年 | 171篇 |
1985年 | 136篇 |
1984年 | 89篇 |
1983年 | 89篇 |
1982年 | 39篇 |
1981年 | 38篇 |
1979年 | 63篇 |
1978年 | 55篇 |
1977年 | 51篇 |
1974年 | 37篇 |
1973年 | 38篇 |
1970年 | 36篇 |
1969年 | 35篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
neurogenetics - Mediator (MED) is a key regulator of protein-coding gene expression, and mutations in MED subunits are associated with a broad spectrum of diseases. Because mutations in MED17... 相似文献
2.
3.
4.
5.
Yutaka Okishio Tadayoshi Takeuchi Akikazu Fujita Kiyotaka Suenaga Kaori Fujinami Satoru Munakata Tadashi Takewaki Fumiaki Hata 《Journal of Smooth Muscle Research》2005,41(3):163-174
Recently an essential role of interstitial cells of Cajal (ICC) within myenteric plexus (ICC-MY) was suggested in ascending contraction and descending relaxation in the mouse ileum. The role of ICC in these neural reflexes was examined in the distal colonic segments prepared from the wild type and c-kit mutant, W/W(V) mice, in the present study. Localized distension of the segments from the wild type mice by using a small balloon resulted in ascending contraction and descending relaxation. In the segments from the mutant mice, localized distension also induced these neural reflexes similar to those observed in the wild type mice. Immunohistochemical examination demonstrated that ICC-MY and ICC present in muscle layers (ICC-IM) were severely disrupted in the mutant mouse, but only ICC, present within submucosal plexus (ICC-SMP), remained unchanged. In the small strips with ICC-SMP absent prepared from the mutant mouse, electrical field stimulation induced contraction or relaxation in the absence or presence of atropine, respectively. It was suggested that ICC have no important role in the ascending and descending neural reflexes in the mouse distal colon, this is in direct contrast to the role of ICC-MY in the ileum. 相似文献
6.
7.
8.
Minimum incision endoscopic nephrectomy for giant hydronephrosis 总被引:1,自引:0,他引:1
Fumitaka Koga Kazunori Kihara Hitoshi Masuda Yukio Kageyama Satoru Kawakami Tsuyoshi Kobayashi 《International journal of urology》2007,14(8):774-776
Five consecutive patients with symptomatic giant hydronephrosis underwent minimum incision endoscopic nephrectomy. The originally huge renal specimen was retroperitoneally mobilized using both of endoscopy and direct vision, without the use of trocar ports or gas insufflation, via a single minimum incision that narrowly permitted extraction of the specimen. The specimen was successfully extracted from the incision in all patients. Technically, proper deflation of the hydronephrotic sac facilitates mobilization and enables extraction of the specimen. Median (range) size of incision, operative time, and estimated blood loss were 4 cm (3-5), 205 min (156-222), and 210 mL (110-350), respectively. No patient required blood transfusion or encountered operative complications. Postoperative convalescence was short and uneventful; all patients resumed oral intake and ambulance on the day following surgery, and were physically dischargeable from hospital after 2-3 postoperative days. Thus, this technique is a feasible, minimally invasive and safe procedure for symptomatic giant hydronephrosis. 相似文献
9.
Yuhei Okubo Junji Yonese Satoru Kawakami Sinya Yamamoto Yoshinobu Komai Hideki Takeshita Yuichi Ishikawa Iwao Fukui 《International journal of urology》2007,14(9):854-855
Renal cell carcinoma (RCC) causes many kinds of symptoms such as hypercalcemia, hypertension, polycythemia and fever. Here we describe a rare case of RCC presenting with a persistent cough. After radical nephrectomy, the obstinate cough disappeared. When the tumor recurred locally, the cough also recurred. Furthermore, the cough disappeared completely again after the removal of the recurrent tumor. Although all the clinical findings suggested that the RCC caused the cough, we could not identify a specific humoral substance responsible for the cough. 相似文献
10.
Seiichi Saito Shunichi Namiki Kenji Numahata Makoto Satoh Shigeto Ishidoya Akihiro Ito Haruo Nakagawa Yasuhiro Kaiho Takehiko Sanada Atsushi Yamada Yoichi Arai 《International journal of urology》2007,14(2):133-139
PURPOSE: To determine the effect of an interposition nerve graft on sexual function after radical prostatectomy. METHODS: This study includes 64 patients, without hormonal therapy, who underwent a radical prostatectomy and intraoperative electrophysiological confirmation of cavernous nerve preservation. Twelve patients underwent a unilateral interposition sural nerve graft (UNG) for the resected neurovascular bundle. Twenty-one and 31 patients underwent bilateral nerve-sparing (BNS) and unilateral nerve-sparing (UNS) surgery without a nerve graft, respectively. As the age of patients was significantly younger in the UNG group than in the other groups, age-matched analysis also was conducted. Sexual function, evaluated by a self-administered questionnaire using the University of California Los Angeles-Prostate Cancer Index, was compared statistically among the three groups. RESULTS: In the age-matched analysis, the postoperative sexual function (SXF) score of the UNG group showed an intermediate level of recovery between those of the BNS and UNS groups at 12 months and reached the same level as the score at 12 months of the BNS group at 18 months postoperatively. The difference in the SXF score between the UNG and UNS groups began to appear after 6 months postoperatively and increased steadily with time. However, the background factors, such as the baseline SXF score, the usage rate of phosphodiesterase 5 inhibitors, and the rate of comorbidities were different between the UNG and UNS groups. CONCLUSIONS: The difference of the SXF score between the UNG and UNS groups increased with time after 6 months postoperatively. However, it might be difficult at present to attribute a better recovery of the SXF score to the nerve graft because of the difference in the background factors between the groups. 相似文献