全文获取类型
收费全文 | 2057篇 |
免费 | 101篇 |
国内免费 | 6篇 |
专业分类
耳鼻咽喉 | 12篇 |
儿科学 | 43篇 |
妇产科学 | 18篇 |
基础医学 | 231篇 |
口腔科学 | 52篇 |
临床医学 | 158篇 |
内科学 | 475篇 |
皮肤病学 | 62篇 |
神经病学 | 147篇 |
特种医学 | 67篇 |
外科学 | 400篇 |
综合类 | 5篇 |
预防医学 | 53篇 |
眼科学 | 15篇 |
药学 | 229篇 |
中国医学 | 3篇 |
肿瘤学 | 194篇 |
出版年
2023年 | 21篇 |
2022年 | 24篇 |
2021年 | 54篇 |
2020年 | 31篇 |
2019年 | 38篇 |
2018年 | 49篇 |
2017年 | 44篇 |
2016年 | 34篇 |
2015年 | 42篇 |
2014年 | 62篇 |
2013年 | 82篇 |
2012年 | 125篇 |
2011年 | 145篇 |
2010年 | 94篇 |
2009年 | 76篇 |
2008年 | 119篇 |
2007年 | 119篇 |
2006年 | 125篇 |
2005年 | 120篇 |
2004年 | 106篇 |
2003年 | 108篇 |
2002年 | 111篇 |
2001年 | 42篇 |
2000年 | 38篇 |
1999年 | 53篇 |
1998年 | 18篇 |
1997年 | 14篇 |
1996年 | 12篇 |
1995年 | 16篇 |
1994年 | 12篇 |
1993年 | 5篇 |
1992年 | 17篇 |
1991年 | 16篇 |
1990年 | 16篇 |
1989年 | 12篇 |
1988年 | 20篇 |
1987年 | 18篇 |
1986年 | 22篇 |
1985年 | 19篇 |
1984年 | 10篇 |
1983年 | 5篇 |
1982年 | 7篇 |
1981年 | 8篇 |
1979年 | 14篇 |
1978年 | 6篇 |
1977年 | 7篇 |
1973年 | 5篇 |
1972年 | 3篇 |
1967年 | 6篇 |
1966年 | 7篇 |
排序方式: 共有2164条查询结果,搜索用时 31 毫秒
41.
Tomomasa Tochio Katsumi Mukai Youichirou Baba Hiroki Asakawa Kenji Nose Satomi Tsuruga Hiroaki Kumazawa Yoshiaki Isono Hiroki Tanaka Shimpei Matsusaki Tomohiro Sase Tomonori Saito Hiroshi Okano Miki Usui Gen Watanabe 《Clinical journal of gastroenterology》2018,11(6):465-469
Primary clear cell adenocarcinoma (CCA) of the colorectum is a rare tumor. We report on a 48-year-old man with early stage CCA in the descending colon who underwent detailed examination with image-enhanced endoscopy, such as magnifying endoscopy with narrow-band imaging and crystal violet staining. The tumor was treated successfully with endoscopic mucosal resection at our hospital. 相似文献
42.
Shigetsuna Komatsu Masaru Honma Satomi Igawa Hitomi Tsuji Akemi Ishida‐Yamamoto Kiyoshi Migita Hiroaki Ida Hajime Iizuka 《The Journal of dermatology》2014,41(9):827-829
Familial Mediterranean Fever (FMF) is a hereditary autoinflammatory disease, which is characterized by recurrent and paroxysmal fever, peritonitis, arthritis, myalgia, and skin rashes. Although various skin lesions such as “erysipelas‐like erythema”, urticaria, nonspecific purpura, and subcutaneous nodules have been described, cutaneous vasculitis is rare. We report a Japanese case of sporadic FMF accompanied by cutaneous arteritis at the time of febrile attacks of FMF. Gene analysis revealed M694I mutation in a single allele of the MEFV gene, and oral colchicine successfully controlled both periodic fever and subcutaneous nodules of arteritis. Cutaneous necrotizing vasculitis repeatedly emerging with febrile attacks should be included among the skin manifestations of FMF. 相似文献
43.
44.
Shinohara K Adachi M Matsui K Matsuda K Nagaya S Morishita E 《International journal of hematology》2008,87(3):256-259
The patient, a 20-year-old male, was found to have a slightly prolonged prothrombin time (PT). No episodes of bleeding were
noted. The measurement of coagulation factors revealed that the level of factor X (FX) activity was solely deficient, 51%
(normal range: 70–130% ), and that of FX antigen was 100%. Analysis of the entire FX gene revealed the novel missense mutation
of GTG to ATG, resulting in the substitution of the 196th amino acid valine → methionine. The mother and younger brother had a normal
PT time and expressed no episode of bleeding. The mother exhibited a normal level of FX activity and antigen; however the
younger brother showed a slight decrease in both the parameters. This mutation was not observed in the mother and younger
brother. Polymorphism is not observed at this point in healthy persons. The present novel FX mutation was named FX Hofu. 相似文献
45.
BACKGROUND: We developed a method for reorganizing the mouse small intestine. In the present study, we investigated whether the reorganized small intestine was morphologically and histochemically differentiated. We also evaluated the reorganized small intestine as an in vitro wound healing model. METHODS: Fetal mouse small intestines were dispersed into single cells, which were then cultured to a high density. Newly formed small intestine-like organs on a membrane filter were observed by light and electron microscopy. Alkaline phosphatase (ALPase) activity of the epithelium was analyzed. To evaluate the reorganized small intestine as an in vitro wound healing model, a scalpel was used to cut the reorganized intestine on a membrane, and the healing process was morphologically and immunohistochemically examined. RESULTS: After 6 days in culture, the surface was almost completely coveed with epithelial cells, and villus-like structures were observed. These epithelial cells formed microvilli, and in parallel with this development, ALPase activity of the microvilli increased (from day 4). Twenty-four hours after the cutting, the wound surface was almost completely covered with undifferentiated epithelial cells. The number of acetylated low-density lipoprotein labeled with 1,1,dioctadecyll,3,3,3,3, tetramethyl-indocarbocyanine perchlorate (DiI-Ac-LDL)-positive macrophages increased after cutting. Platelet-derived growth factor (PDGF)-, basic fibroblast growth factor (bFGF)-, matrix metalloproteinase-1 (MMP-1)-positive cells were detected by immunohistochemical staining. CONCLUSIONS: The reorganized small intestine had a morphologically and histochemically differentiated organoid structure, and was useful as an in vitro model for investigating the process of wound healing. 相似文献
46.
Orii T Ohkohchi N Sasaki K Satomi S Watanabe M Moriya T 《Hepato-gastroenterology》2003,50(50):333-336
We describe the case of a 72-year-old asymptomatic man with a cholangiocarcinoma arising from a biliary hamartoma, also referred to as "von Meyenburg's complex". The patient was clinically diagnosed as having a cystadenocarcinoma, but the tumor had already been present as a uniformly low-density area on computed tomography taken four years previously, as revealed by retrospective examination of the computed tomography films that had been taken annually after surgery for pulmonary emphysema. The low-density area had continued to enlarge year after year, and a high-density area was observed to have emerged inside the low-density area on computed tomography. Histopathological examination demonstrated that the high-density area corresponded to the cholangiocarcinoma and the low-density area to a biliary hamartoma. This is the first case in which it was possible to confirm the presence of cholangiocarcinoma inside a biliary hamartoma that had continued to increase in size. 相似文献
47.
48.
Fukukawa Y Nakashima C Tsuboi S Niino N Ando F Kosugi S Shimokata H 《The journals of gerontology. Series B, Psychological sciences and social sciences》2004,59(1):P19-P26
In this study, we compared the impact of health problems (HPs) on everyday activities and depressive symptoms between middle-aged and older adults. We also examined what type and source of social interactions moderate the noxious effects of HPs. Longitudinal analyses of data with 1,802 Japanese community-dwelling adults indicated that HPs were significantly related to (a) an increase in depressive symptoms among middle-aged adults and (b) a decline in everyday activities among older adults. The former was buffered by emotional family support, whereas the latter (b) was buffered by instrumental family support and, surprisingly, by negative interactions with family. In contrast, social interactions with other friends and acquaintances did not show any moderating effect. 相似文献
49.
Virus-associated hemophagocytic syndrome in an international traveler as a differential diagnosis of SARS 总被引:3,自引:0,他引:3
During the epidemic of severe acute respiratory syndrome in 2003, a 27-year- old Japanese woman presented a high fever and acute respiratory distress with pulmonary infiltrates after traveling to a high-risk area. An alternative diagnosis was made as Epstein-Barr virus-associated hemophagocytic syndrome, based on the proliferation of macrophages with hemophagocytosis in the bone marrow and Epstein-Barr viral marker profiles. Virus-associated hemophagocytic syndrome in an international traveler should be included in the differential diagnosis of severe acute respiratory syndrome. 相似文献
50.
Satomi Koizumi Terumi Kamisawa Sawako Kuruma Taku Tabata Kazuro Chiba Susumu Iwasaki Go Kuwata Takashi Fujiwara Junko Fujiwara Takeo Arakawa Koichi Koizumi Kumiko Momma 《Journal of Korean medical science》2015,30(6):743-748
IgG4-related disease (IgG4-RD) is a potentially multiorgan disorder. In this study, clinical and serological features from 132 IgG4-RD patients were compared about organ correlations. Underlying pathologies comprised autoimmune pancreatitis (AIP) in 85 cases, IgG4-related sclerosing cholangitis (IgG4-SC) in 12, IgG4-related sialadenitis (IgG4-SIA) in 56, IgG4-related dacryoadenitis (IgG4-DAC) in 38, IgG4-related lymphadenopathy (IgG4-LYM) in 20, IgG4-related retroperitoneal fibrosis (IgG4-RF) in 19, IgG4-related kidney disease (IgG4-KD) in 6, IgG4-related pseudotumor (IgG4-PT) in 3. Sixty-five patients (49%) had multiple IgG4-RD (two affected organs in 36 patients, three in 19, four in 8, five in 1, and six in 1). Serum IgG4 levels were significantly higher with multiple lesions than with a single lesion (P<0.001). The proportion of association with other IgG4-RD was 42% in AIP, the lowest of all IgG4-RDs. Serum IgG4 level was lower in AIP than in other IgG4-RDs. Frequently associated IgG4-RDs were SIA (25%) and DAC (12%) for AIP; AIP (75%) for IgG4-SC; DAC (57%), AIP (38%) and LYM (27%) for IgG4-SIA; AIP (26%) and LYM (26%) for IgG4-DAC; SIA (75%), DAC (50%) and AIP (45%) for IgG4-LYM; SIA (58%), AIP (42%) and LYM (32%) for IgG4-RF; AIP (100%) and SIA (67%) for IgG4-KID; and DAC (67%) and SIA (67%) for IgG4-PT. Most associated IgG4-RD lesions were diagnosed simultaneously, but IgG4-SIA and IgG4-DAC were sometimes identified before other lesions. About half of IgG4-RD patients had multiple IgG4-RD lesions, and some associations were seen between specific organs.