全文获取类型
收费全文 | 5221篇 |
免费 | 255篇 |
国内免费 | 10篇 |
专业分类
耳鼻咽喉 | 36篇 |
儿科学 | 86篇 |
妇产科学 | 55篇 |
基础医学 | 705篇 |
口腔科学 | 106篇 |
临床医学 | 290篇 |
内科学 | 1022篇 |
皮肤病学 | 121篇 |
神经病学 | 635篇 |
特种医学 | 206篇 |
外科学 | 736篇 |
综合类 | 13篇 |
预防医学 | 302篇 |
眼科学 | 188篇 |
药学 | 457篇 |
中国医学 | 11篇 |
肿瘤学 | 517篇 |
出版年
2023年 | 28篇 |
2022年 | 67篇 |
2021年 | 84篇 |
2020年 | 45篇 |
2019年 | 67篇 |
2018年 | 117篇 |
2017年 | 72篇 |
2016年 | 123篇 |
2015年 | 97篇 |
2014年 | 125篇 |
2013年 | 145篇 |
2012年 | 236篇 |
2011年 | 262篇 |
2010年 | 148篇 |
2009年 | 119篇 |
2008年 | 221篇 |
2007年 | 229篇 |
2006年 | 209篇 |
2005年 | 192篇 |
2004年 | 193篇 |
2003年 | 176篇 |
2002年 | 213篇 |
2001年 | 185篇 |
2000年 | 210篇 |
1999年 | 190篇 |
1998年 | 84篇 |
1997年 | 56篇 |
1996年 | 59篇 |
1995年 | 49篇 |
1994年 | 42篇 |
1993年 | 36篇 |
1992年 | 147篇 |
1991年 | 129篇 |
1990年 | 105篇 |
1989年 | 105篇 |
1988年 | 108篇 |
1987年 | 89篇 |
1986年 | 83篇 |
1985年 | 86篇 |
1984年 | 53篇 |
1983年 | 39篇 |
1982年 | 34篇 |
1981年 | 38篇 |
1979年 | 47篇 |
1978年 | 28篇 |
1976年 | 26篇 |
1973年 | 27篇 |
1971年 | 26篇 |
1970年 | 33篇 |
1969年 | 25篇 |
排序方式: 共有5486条查询结果,搜索用时 0 毫秒
101.
Kokichi Sugano Hisanao Ohkura Takashi Maruyama Masahiko Watanabe Setsuo Hirohashi Yukio Shimosato Susumu Kodaira Osahiko Abe 《Cancer science》1988,79(5):618-625
Sandwich radioimmunometric assay (RIA) for a new tumor-associated carbohydrate antigen defined by a monoclonal antibody (MoAb), NCC-ST-439, was developed and the antigen levels were determined in sera of normal donors, and patients with various malignant and non-malignant disorders. In normal donors, 97.0% (226/233) of sera were antigen-negative (less than 12 units/ml) except for 7 serum samples from young females. In patients with malignant disorders, 34.2% (82/240) were antigen-positive, in particular 64.0% (16/25) of patients with pancreatic carcinoma, 66.7% (16/24) of patients with recurrent colorectal carcinoma and 54,5% (6/11) of patients with recurrent breast carcinoma. In patients with non-malignant disorders, 6.0% (7/116) were antigen-positive. The positive rate in benign hepatobiliary disorders, including gallstones, hepatitis and liver cirrhosis, was especially low at 4.3% (1/23). We concluded that determination of serum NCC-ST-439 antigen would be useful in serodiagnosis of carcinoma patients. 相似文献
102.
103.
Colloidal crystals (CCs) are periodic arrays of monodisperse microparticles. Such CCs are very attractive as they can be potentially applicable as versatile photonic devices such as reflective displays, sensors, lasers, and so forth. In this article, we describe a promising methodology for synthesizing monodisperse magnetite microparticles whose diameters are controllable in the range of 100–200 nm only by adjusting the base concentration of the reaction solution. Moreover, monodisperse magnetite microparticles in aqueous suspensions spontaneously form the CC structures under an external magnetic field, leading to the appearance of Bragg reflection colors. The reflection peak can be blue-shifted from 730 nm to 570 nm by the increase in the external magnetic field from 28 mT to 220 mT. Moreover, the reflection properties of CCs in suspension depend on the microparticle concentration in suspension and the diameter of the magnetite microparticles. Both fine-control of microparticle diameter and investigation of magneto-optical properties of CCs would contribute to the technological developments in full-color reflective displays and sensors by utilizing these monodisperse magnetite microparticles. 相似文献
104.
Inhibitory effects of licochalcone A isolated from Glycyrrhiza inflata root on inflammatory ear edema and tumour promotion in mice 总被引:1,自引:0,他引:1
S Shibata H Inoue S Iwata R D Ma L J Yu H Ueyama J Takayasu T Hasegawa H Tokuda A Nishino 《Planta medica》1991,57(3):221-224
Licochalcone A, 3-a,a-dimethylallyl-4,4'-dihydroxy-6-methoxychalcone, from the root of Glycyrrhiza inflata Beta (Leguminosae) (Xin-jiang liquorice) showed anti-inflammatory action towards mouse ear edema induced by arachidonic acid (AA) and 12-O-tetradecanoylphorbol 13-acetate (TPA) by topical application. Anti-tumour promoting action of licochalcone A was also observed in vivo for mouse skin papilloma initiated by dimethylbenz[a]anthracene (DMBA) and promoted by TPA. It inhibited in vitro 32Pi-incorporation to phospholipids in HeLa cells promoted by TPA. A competitive interaction of licochalcone A with the TPA-receptors in the cell membrane has been suggested. 相似文献
105.
Behavior management of feeding disturbances in urea cycle and organic acid disorders 总被引:2,自引:0,他引:2
S L Hyman C A Porter T J Page B A Iwata R Kissel M L Batshaw 《The Journal of pediatrics》1987,111(4):558-562
106.
107.
Eiji Kozawa Yoshihiro Nishida Akira Kawai Keiko Hayakawa Nokitaka Setsu Hiroyuki Kawashima Shintaro Iwata Hiroyuki Tsuchiya Satoshi Tsukushi Satoshi Takenaka Jungo Imanishi Ichiro Baba Akihito Nagano Takeshi Morii Toshiharu Shirai Koki Shimizu Hirotaka Kawano 《Cancer science》2022,113(7):2397
Chondrosarcoma is the second most common primary malignant bone tumor. In this multicenter study, we sought to evaluate the disease‐specific survival (DSS) and disease‐free survival (DFS), and prognostic factors in patients with dedifferentiated chondrosarcoma (DDCS) or grade 3 chondrosarcoma (G3CS) in Japan. We retrospectively investigated the treatment outcomes and prognostic factors in 62 patients with DDCS and 19 patients with G3CS at 15 institutions participating in the Japanese Musculoskeletal Oncology Group. We also clarified significant clinicopathological factors for oncological outcomes. In surgery for primary lesions aimed at cure, a histologically negative margin (R0) was obtained in 93% (14/15) of patients with G3CS and 100% (49/49) of patients with DDCS. The 5‐year DSS was 18.5% in patients with DDCS and 41.7% in patients with G3CS (p = 0.13). Local control was obtained in 80% (12/15) and 79.6% (39/49) of patients with G3CS and DDCS in the primary lesion after surgery with a wide surgical margin, respectively. In multivariate analysis, stage and no treatment/palliative treatment for the primary lesion were independent prognostic factors for DSS of DDCS, and age and no treatment/palliative treatment for DSS of G3CS. The 5‐year DFS rate was 22.8% in 26 patients with DDCS who did not receive adjuvant chemotherapy, and 21.4% in 14 patients who received adjuvant chemotherapy. The prognosis of DDCS remains poor, although R0 resection was carried out in most cases. Effective and/or intensive chemotherapeutic regimens or agents should be considered or developed for patients with high‐grade chondrosarcoma, particularly for those with DDCS. 相似文献
108.
Nozomi Kita Yuta Shibamoto Shinya Takemoto Yoshihiko Manabe Takeshi Yanagi Chikao Sugie Natsuo Tomita Hiromitsu Iwata Taro Murai Shingo Hashimoto Satoshi Ishikura 《Journal of radiation research》2022,63(4):666
The outcomes of three methods of intensity-modulated radiation therapy (IMRT) for localized prostate cancer were evaluated. Between 2010 and 2018, 308 D’Amico intermediate- or high-risk patients were treated with 2.2 Gy daily fractions to a total dose of 74.8 Gy in combination with hormonal therapy. Overall, 165 patients were treated with 5-field IMRT using a sliding window technique, 66 were then treated with helical tomotherapy and 77 were treated with volumetric modulated arc therapy (VMAT). The median age of patients was 71 years. The median follow-up period was 75 months. Five-year overall survival (OS) and biochemical or clinical failure-free survival (FFS) rates were 95.5 and 91.6% in the 5-field IMRT group, 95.1 and 90.3% in the tomotherapy group and 93.0 and 88.6% in the VMAT group, respectively, with no significant differences among the three groups. The 5-year cumulative incidence of late grade ≥2 genitourinary and gastrointestinal toxicities were 7.3 and 6.2%, respectively, for all patients. Late grade ≥2 gastrointestinal toxicities were less frequent in patients undergoing VMAT (0%) than in patients undergoing 5-field IMRT (7.3%) and those undergoing tomotherapy (11%) (P = 0.025), and this finding appeared to be correlated with the better rectal DVH parameters in patients undergoing VMAT. Other toxicities did not differ significantly among the three groups, although bladder dose-volume parameters were slightly worse in the tomotherapy group than in the other groups. Despite differences in the IMRT delivery methods, X-ray energies and daily registration methods, all modalities may be used as IMRT for localized prostate cancer. 相似文献
109.
Teruki Miyake Bunzo Matsuura Shinya Furukawa Toru Ishihara Osamu Yoshida Masumi Miyazaki Kyoko Watanebe Akihito Shiomi Hironobu Nakaguchi Yasunori Yamamoto Yohei Koizumi Yoshio Tokumoto Masashi Hirooka Eiji Takeshita Teru Kumagi Masanori Abe Yoshio Ikeda Takeru Iwata Yoichi Hiasa 《Journal of diabetes investigation.》2022,13(7):1245
IntroductionNonalcoholic fatty liver disease (NAFLD) is diagnosed after excluding other liver diseases. The pathogenesis of NAFLD when complicated by other liver diseases has not been established completely. Metabolic dysfunction‐associated fatty liver disease (MAFLD) involves more metabolic factors than NAFLD, regardless of complications with other diseases. This study aimed to clarify the effects of fatty liver occurring with metabolic disorders, such as MAFLD without diabetes mellitus (DM), on the development of DM.Materials and MethodsWe retrospectively assessed 9,459 participants who underwent two or more annual health check‐ups. The participants were divided into the MAFLD group (fatty liver disease with overweight/obesity or non‐overweight/obesity complicated by metabolic disorders), simple fatty liver group (fatty liver disease other than MAFLD group), metabolic disorder group (metabolic disorder without fatty liver disease), and normal group (all other participants).ResultsThe DM onset rates in the normal, simple fatty liver, metabolic disorder, and MAFLD groups were 0.51, 1.85, 2.52, and 7.36%, respectively. In the multivariate analysis, the MAFLD group showed a significantly higher risk of DM onset compared with other three groups (P < 0.01). Additionally, the risk of DM onset was significantly increased in fatty liver disease with overweight/obesity or pre‐diabetes (P < 0.01).ConclusionsFatty liver with metabolic disorders, such as MAFLD, can be used to identify patients with fatty liver disease who are at high risk of developing DM. Additionally, patients with fatty liver disease complicated with overweight/obesity or prediabetes are at an increased risk of DM onset and should receive more attention. 相似文献
110.
Tomoko Akahane Kenta Masuda Akira Hirasawa Yusuke Kobayashi Arisa Ueki Miho Kawaida Kumiko Misu Kohei Nakamura Shimpei Nagai Tatsuyuki Chiyoda Wataru Yamagami Shigenori Hayashi Fumio Kataoka Kouji Banno Kokichi Sugano Hajime Okita Kenjiro Kosaki Hiroshi Nishihara Daisuke Aoki 《Journal Of Gynecologic Oncology》2022,33(4)
ObjectivePrecursor lesions may be identified in fallopian tube tissue after risk-reducing salpingo-oophorectomy (RRSO) in patients with pathogenic variants of BRCA1/2. Serous tubal intraepithelial carcinoma (STIC) is considered a precursor of high-grade serous carcinoma, whereas the significance of the p53 signature remains unclear. In this study, we investigated the relationship between the p53 signature and the risk of ovarian cancer.MethodsWe analyzed the clinicopathological findings and conducted DNA sequencing for TP53 variants of p53 signatures and STIC lesions isolated using laser capture microdissection in 13 patients with pathogenic variants of BRCA1/2 who underwent RRSO and 17 control patients with the benign gynecologic disease.Results TP53 pathogenic variants were detected significantly higher in RRSO group than control (p<0.001). No difference in the frequency of p53 signatures were observed between groups (53.8% vs 29.4%; p=0.17). TP53 sequencing and next-generation sequencing analysis in a patient with STIC and occult cancer revealed 2 TP53 mutations causing different p53 staining for STICs and another TP53 mutation shared between STIC and occult cancer.ConclusionThe sequence analysis for TP53 revealed 2 types of p53 signatures, one with a risk of progression to STIC and ovarian cancer with pathological variants in TP53 and the other with a low risk of progression without pathological variants in TP53 as seen in control. 相似文献