全文获取类型
收费全文 | 14120篇 |
免费 | 679篇 |
国内免费 | 53篇 |
专业分类
耳鼻咽喉 | 141篇 |
儿科学 | 394篇 |
妇产科学 | 205篇 |
基础医学 | 1798篇 |
口腔科学 | 407篇 |
临床医学 | 1059篇 |
内科学 | 3241篇 |
皮肤病学 | 195篇 |
神经病学 | 987篇 |
特种医学 | 586篇 |
外科学 | 2990篇 |
综合类 | 64篇 |
一般理论 | 1篇 |
预防医学 | 479篇 |
眼科学 | 311篇 |
药学 | 829篇 |
中国医学 | 25篇 |
肿瘤学 | 1140篇 |
出版年
2023年 | 78篇 |
2022年 | 187篇 |
2021年 | 277篇 |
2020年 | 164篇 |
2019年 | 196篇 |
2018年 | 236篇 |
2017年 | 194篇 |
2016年 | 197篇 |
2015年 | 218篇 |
2014年 | 294篇 |
2013年 | 395篇 |
2012年 | 628篇 |
2011年 | 646篇 |
2010年 | 365篇 |
2009年 | 287篇 |
2008年 | 484篇 |
2007年 | 575篇 |
2006年 | 563篇 |
2005年 | 575篇 |
2004年 | 544篇 |
2003年 | 591篇 |
2002年 | 557篇 |
2001年 | 515篇 |
2000年 | 550篇 |
1999年 | 476篇 |
1998年 | 243篇 |
1997年 | 152篇 |
1996年 | 155篇 |
1995年 | 105篇 |
1994年 | 111篇 |
1993年 | 102篇 |
1992年 | 345篇 |
1991年 | 352篇 |
1990年 | 315篇 |
1989年 | 322篇 |
1988年 | 306篇 |
1987年 | 302篇 |
1986年 | 275篇 |
1985年 | 263篇 |
1984年 | 155篇 |
1983年 | 166篇 |
1982年 | 79篇 |
1979年 | 142篇 |
1978年 | 80篇 |
1977年 | 89篇 |
1975年 | 92篇 |
1974年 | 91篇 |
1973年 | 109篇 |
1972年 | 93篇 |
1971年 | 85篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
An ulnar recurrent adipofascial flap was raised and turned over to reconstruct massive defects around the elbow and forearm after wide resection of malignant tumours. Compared to the fasciocutaneous flap, the ulnar recurrent adipofascial flap has the following advantages: (1) a larger flap can be harvested without the problem of primary closure of the donor site, (2) the contour and scar of the donor site is reasonably acceptable since no tension is presented, (3) the flap can be turned over to cover a wider area, and (4) debulking of the flap can be performed during the operation if needed. The rotation arc of the ulnar recurrent adipofascial flap reaches a wide region, including the distal one-half of the upper arm, the elbow, and the proximal two-thirds of the forearm. Sensory deficit in the forearm was avoided in our patients because meticulous separation and preservation of the medial cutaneous nerve of the forearm was achieved without jeopardising the blood supply to the flap. The ulnar recurrent adipofascial flap is an easy and reliable option for one-stage reconstruction of massive defects around the elbow. 相似文献
72.
Atsushi Takai Yoshihiro Okabe Nobuhiro Aoki Mariko Takada Shuji Yamamoto Naoya Kimoto Mikio Fujita Akihiko Okada Chiharu Kawanami Yukinobu Takimoto Akio Orino 《Nihon Shokakibyo Gakkai zasshi》2007,104(10):1498-1503
A 77-year-old man, who underwent segmental pancreatectomy for intraductal papillary mucinous adenoma in 2001, was referred to our hospital with complaints of hematemesis and melena on January, 2004. Emergency upper gastrointestinal endoscopy showed a pulsating submucosal protrusion in the duodenal bulb, which was identified as a gastroduodenal arterial aneurysm measuring 1.5cm on abdominal CT imaging. Transcatheter arterial embolization of the aneurysm with metallic coils was successfully performed. Periodically repeated endoscopic examination has revealed the coils protruding into the duodenal lumen without any serious complication. 相似文献
73.
Mitsuo Miyazawa Takahiro Torii Yasuko Toshimitsu Katsuya Okada Isamu Koyama Yoshito Ikada 《American journal of transplantation》2005,5(6):1541-1547
The aim of this study was to fabricate an artificial bile duct for the development of a new treatment for biliary diseases. Eighteen hybrid pigs were implanted with a bile duct organoid unit (BDOU) made of a bioabsorbable polymer. Twelve of the transplanted BDOUs had been seeded with autologous bone marrow cells (BMCs) in advance. Six animals, the controls, were grafted with the scaffold alone with no BMCs seeded. The common bile duct was cut, the hepatic cut end of the native common bile duct was anastomosed to the BDOU and the other end was anastomosed to the duodenum. The controls underwent a similar operation. The neo-bile duct was removed at pre-determined time points and investigated histologically. All 18 recipient pigs survived until their sacrifice at 6 weeks, 10 weeks or 6 months. Histological examination revealed incomplete epithelialization of the neo-bile duct at 6 weeks and 10 weeks after transplantation. At 6 months, the organoid exhibited a morphology almost identical to that of the native common bile duct. No differences were found between the controls and BMC-seeded pigs. These results show that the artificial bile duct thus fabricated can serve as a substitute for the native bile duct. 相似文献
74.
Taihiko Yamaguchi Saki Mikami Kazuki Okada 《Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics》2007,104(5):e22-e27
To verify validity of a newly developed ultraminiature EMG measurement system (BMS), the ability of BMS to record masseteric EMG was compared with that of a conventional polygraph system (PG) in the daytime. Effective distance between the transmitter unit and receiver unit of BMS was also examined. Subjects were 12 healthy volunteers. During tapping, maximum clenching, and gum chewing of all subjects, distinct bursts were observed in EMG recorded by BMS as well as PG. RMS values of maximum clenching measured by BMS and PG showed a linear and significant correlation, and there was no significant difference between the data of BMS and PG. When distance between the transmitter unit and receiver unit of BMS was 100 cm or less, no artifact signal was observed. Having obtained these findings suggesting ability for precise measurement in the daytime, we are planning to use BMS in home sleep studies in the next step. 相似文献
75.
76.
M Nasu H Fujiwara J Sono Y Okada S Miyamoto S Nishiuchi K Tatemichi T Shomura 《The Journal of cardiovascular surgery》1990,31(6):809-811
Annulo-aortic ectasia is an extremely rare complication of Gaucher's disease. We report successful surgery in a patient with Gaucher's disease complicated by annulo-aortic ectasia and aortic dissection. Cabrol's operation was accomplished without bleeding or sternal adaptation problems. 相似文献
77.
78.
Tadaki Yasumura MD Toshikazu Akami Manabu Mitsuo Takahiro Oka Kazuo Naitoh Takara Yamamoto Hideo Honjyo Hiroji Okada 《Surgery today》1990,20(4):369-375
The ovarian and pituitary functions of 64 operable breast cancer patients undergoing adjuvant therapy with cytotoxic chemotherapy
and/or tamoxifen were investigated. The post menopausal patients, divided into 3 treatment groups, one with tamoxifen alone,
one with tamoxifen and chemotherapy and the other with chemotherapy alone had serum estradiol 17-β (E2) and progesterone levels
lower than the evaluable limits. Although there was no significant difference in the level of estrone sulfate (E1-S) between
these three groups, the level of lutainizing hormone (LH) and follicle stimulating hormone (FSH) in the patients treated with
tamoxifen alone and tamoxifen and chemotherapy were significantly lower than those treated with chemotherapy alone. The decrease
in gonadotropin levels induced by tamoxifen treatment was reversible as it appeared after the initiation of tamoxifen and
recovered after its cessation. In the premenopausal patients, a group treated with tamoxifen and chemotherapy had significantly
higher E1-S, E2 and progesterone levels and significantly lower gonadotropin levels than a group treated with chemotherapy
alone or one treated with a cyclophosphamide regimen. These increases in the levels of estrogen and progesterone were also
reversible, and induced by tamoxifen. Thus, adjuvant endocrinochemotherapy causes profound alteration in the hypothalamo-pituitary-ovarian
axis and therefore, monitoring a variety of hormonal levels is thought to be necessary for assessing the consequences of adjuvant
therapy in breast cancer patients, especially in premenopausal patients using tamoxifen. 相似文献
79.
80.
T Okada 《Nihon Jibiinkoka Gakkai kaiho》1989,92(11):1947-1957
Recent neurophysiological studies have disclosed that the nucleus of the optic tract (NOT) in the pretectum is the first relay station responsible for horizontal optokinetic nystagmus (OKN) both in non-foveate and foveate animals. However, what parts of the retina and what kinds of retinal ganglion cells project their fibers into the NOT have been controversial. In the present study, horseradish peroxidase conjugated with wheatgerm agglutinin (WGA-HRP) was injected into the NOT of rats. The retina and injection sites were processed for the histochemical demonstration of WGA-HRP in order to investigate the distribution of the retinal ganglion cells projecting into the NOT. The present study indicated that visual signals responsible for OKN are mainly conducted from the contralateral retinal ganglion cells, and only from the ventral area of the ipsilateral retina. The retinal ganglion cells projecting into the NOT ipsilateral to the injection site were larger than those on the contralateral side. Large retinal ganglion cells existed on the peripheral areas including ipsilateral ventral area. The density of the ventral ganglion cells of the retina contralateral to the injection site was lower than that in other areas of retina, and the density of the ventral ganglion cells ipsilateral to the injection site tented to be greater than that on the contralateral side. Since the ventral area of retina corresponded to the upper visual field in front of the nose, it may receive visual signal of OKN and fire OKN. In conclusion, visual signals responsible for OKN are conducted through the retinal ganglion cells mainly contralaterally, and only from the ventral area of the retina ipsilateral to the injection site. 相似文献