全文获取类型
收费全文 | 4228篇 |
免费 | 257篇 |
国内免费 | 10篇 |
专业分类
耳鼻咽喉 | 23篇 |
儿科学 | 131篇 |
妇产科学 | 71篇 |
基础医学 | 598篇 |
口腔科学 | 130篇 |
临床医学 | 308篇 |
内科学 | 1099篇 |
皮肤病学 | 69篇 |
神经病学 | 311篇 |
特种医学 | 208篇 |
外科学 | 706篇 |
综合类 | 12篇 |
预防医学 | 128篇 |
眼科学 | 65篇 |
药学 | 210篇 |
中国医学 | 14篇 |
肿瘤学 | 412篇 |
出版年
2023年 | 51篇 |
2022年 | 90篇 |
2021年 | 139篇 |
2020年 | 66篇 |
2019年 | 59篇 |
2018年 | 110篇 |
2017年 | 75篇 |
2016年 | 94篇 |
2015年 | 113篇 |
2014年 | 125篇 |
2013年 | 160篇 |
2012年 | 294篇 |
2011年 | 273篇 |
2010年 | 131篇 |
2009年 | 147篇 |
2008年 | 226篇 |
2007年 | 237篇 |
2006年 | 210篇 |
2005年 | 238篇 |
2004年 | 186篇 |
2003年 | 180篇 |
2002年 | 165篇 |
2001年 | 92篇 |
2000年 | 89篇 |
1999年 | 75篇 |
1998年 | 47篇 |
1997年 | 25篇 |
1996年 | 30篇 |
1995年 | 29篇 |
1994年 | 24篇 |
1993年 | 24篇 |
1992年 | 73篇 |
1991年 | 69篇 |
1990年 | 48篇 |
1989年 | 38篇 |
1988年 | 40篇 |
1987年 | 43篇 |
1986年 | 38篇 |
1985年 | 44篇 |
1984年 | 20篇 |
1983年 | 16篇 |
1981年 | 12篇 |
1979年 | 31篇 |
1978年 | 11篇 |
1974年 | 14篇 |
1973年 | 11篇 |
1971年 | 12篇 |
1969年 | 18篇 |
1968年 | 13篇 |
1967年 | 11篇 |
排序方式: 共有4495条查询结果,搜索用时 31 毫秒
991.
Sugawara Kotaro Yamashita Hiroharu Urabe Masayuki Uemura Yukari Okumura Yasuhiro Yagi Koichi Aikou Susumu Seto Yasuyuki 《International journal of clinical oncology / Japan Society of Clinical Oncology》2022,27(12):1849-1858
International Journal of Clinical Oncology - The tumor-node-metastasis (TNM) staging system does not take the patient’s physiological status into consideration, reportedly making it... 相似文献
992.
Nobuyasu Hirai Yuichi Nishioka Takahiro Sekine Yuji Nishihara Nao Okuda Tomoko Nishimura Hiroyuki Fujikura Natsuko Imakita Tatsuya Fukumori Taku Ogawa Naokuni Hishiya Yuki Suzuki Ryuichi Nakano Hisakazu Yano Masatoshi Sato Koichi Maeda Tomoaki Imamura Kei Kasahara 《Journal of infection and chemotherapy》2021,27(6):864-868
993.
Shiro Miyayama Masashi Yamashiro Natsuki Sugimori Rie Ikeda Kotaro Okimura Naoko Sakuragawa 《Journal of vascular and interventional radiology : JVIR》2019,30(1):10-18
Purpose
To evaluate the outcomes of conventional transarterial chemoembolization using guidance software for hepatocellular carcinoma (HCC) patients.Materials and Methods
One hundred two patients with treatment-naïve HCC with ≤ 7-cm and ≤ 5 lesions treated with conventional transarterial chemoembolization using guidance software were selected. Technical success was classified into 3 grades by computed tomography performed 1 week after transarterial chemoembolization: (i) A, complete embolization with a safety margin; (ii) B, entire tumor embolization without a safety margin; and (iii) C, incomplete embolization. Intrahepatic tumor recurrence was classified into 2 categories: local tumor progression (LTP) and intrahepatic distant recurrence (IDR). Overall survival (OS) and tumor recurrence rates were calculated by the Kaplan-Meier method. Additionally, the incidences of LTP between grade A and B tumors, IDR with/without LTP, and OS with/without LTP were compared by the log-rank test.Results
One hundred fifty-six (82.1%) tumors were determined to be grade A, 26 (13.7%) were determined to be grade B, and 8 (4.2%) were determined to be grade C. The 1-, 3-, and 5-year LTP and IDR rates were 31.7%, 49.4%, and 59.4% and 33.9%, 58.2%, and 73.3%, respectively. LTP developed more frequently in grade B tumors than grade A tumors (P = .0016). IDR developed more frequently in patients with LTP than without LTP (P = .0004). The 1-, 3-, and 5-year OS rates were 96.1%, 71.1%, and 60%, respectively; the 1-, 3-, and 5-year OS rates in patients with/without LTP were 95.7%, 69.8%, and 59.3% and 96.2%, 71.6%, and 59.4%, respectively (P = .9984).Conclusions
Transarterial chemoembolization guidance software promotes the technical success of transarterial chemoembolization and excellent OS in HCC patients. 相似文献994.
A Hayashi K Tatsumi K Sugito H Igari Y Kasahara H Kimura T Kuriyama 《Nihon Kokyūki Gakkai zasshi》2000,38(2):85-91
Endothelin-1 (ET-1) is a potent vasoactive peptide, and is thought to play an important role in the regulation of pulmonary vascular tone. Previous studies suggested that ET-1 can act as a vasoconstrictor via the endothelin-A and -B 2 receptors located on smooth muscle cells, and also act as a vasodilator through the endothelin-B 1 receptor situated on endothelial cells in the pulmonary circulation. To determine the role of endothelin-B receptors in hypoxic pulmonary hypertension, we examined the hemodynamic effects of a selective endothelin-B receptor agonist (IRL 1620) in chronic hypoxic pulmonary hypertensive rats. In rat lungs perfused with a half-blood solution, vasoconstriction by KCl administration was gradually reversed by IRL 1620 in normoxic rats, but not in chronic hypoxic rats. In in vivo studies, small doses of IRL 1620 induced transient vasodilation in normoxic rats, but had no obvious effects in chronic hypoxic rats. A high dose of IRL 1620 mediated vasoconstriction only in chronic hypoxic rats. Endothelin-B receptor messenger-RNA expression was lower in the lungs of chronic hypoxic rats than in normoxic rats. These results suggested that although the vasodilatory response mediated by endothelin-B receptor can be expected to play a protective role in the development of pulmonary hypertension, that response is diminished in hypoxic pulmonary hypertension. 相似文献
995.
996.
Shinichi Koba Noriyuki Misago Kotaro Nagase Noriko Tsuruta Takuya Inoue Satoshi Ikeda Shigehisa Aoki Yutaka Narisawa 《Journal of cutaneous pathology》2014,41(5):469-474
We present a rare case of Merkel cell carcinoma (MCC) with heterologous differentiation. The patient was an 86‐year‐old female patient with MCC who presented with a forearm skin tumor and left axillary lymph node swelling. Histopathologically, the malignant components of the primary and metastatic lesions showed the intermingled features of triphasic phenotype differentiation, which had distinct cell populations; MCC, sweat gland carcinoma (SGC) and malignant poorly differentiated spindle cells with myogenic differentiation were immunohistochemically showed. Moreover, an electron microscopic observation of the tumor cells revealed intracytoplasmic canaliculi and junctional structures that indicated ductal differentiation. To our knowledge, this is the first case of MCC admixed with SGC and sarcomatous components in both the primary and metastatic lesions. An immunohistochemical study, using several stem cell markers, indicated that the MCC arose from pluripotent epidermal stem cells. 相似文献
997.
Noriyuki Misago Toshihiro Takai Yozo Murata Kotaro Nagase Yutaka Narisawa 《The Journal of dermatology》2014,41(5):430-434
We herein report the natural course of an early/proliferative stage keratoacanthoma (KA) with infiltrating islands of cytological malignancy (case 1) and a squamous cell carcinoma (SCC) with a KA‐like component (case 2), which were observed until their complete regression. The presented case 1 suggests that one of the histopathological forms of KA includes this unusual, infiltrating, non‐crateriform architecture, and also indicates the possibility of complete remission in the KA associated with infiltrating islands of cytological malignancy. In the presented case 2, the peripherally‐associated KA‐like focus was histopathologically considered to be either a remnant of KA focus or verrucous keratosis (hyperplasia). Therefore, the complete spontaneous regression of case 2 suggests that SCC arising in KA still has the potential of spontaneous regression, or that an extremely rare event, namely, the spontaneous regression of (traditional) SCC occurred in the present case. 相似文献
998.
Bloom syndrome (BS) is characterized by premature aging and high predisposition to various types of cancer. BLM is the causative gene for BS. BLM functions as a DNA helicase in the direction of 3' to 5' and small subsets of telomeres colocalize with BLM protein. We investigated telomerase activity and telomere repeat length in the cells from BS patients. In Epstein-Barr-virus (EBV) transformed lymphoblastoid cell lines and lymphoma cells from BS patients, telomerase activity was detected as in the control and compared. The metastatic tumor from BS patient, which had a 9-bp deletion of p53 DNA showed the strongest telomerase activity. Telomere repeat length in BS cells showed that there is no large difference compared with normal cells. Collectively, the results show that the BLM gene is not a major structural and regulatory factor in maintaining telomere repeat length and telomerase activity. 相似文献
999.
Locoregional therapy with α‐emitting trastuzumab against peritoneal metastasis of human epidermal growth factor receptor 2‐positive gastric cancer in mice
下载免费PDF全文
![点击此处可从《Cancer science》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Huizi Keiko Li Yukie Morokoshi Kotaro Nagatsu Tadashi Kamada Sumitaka Hasegawa 《Cancer science》2017,108(8):1648-1656
Peritoneal metastasis of gastric cancer (PMGC) is incurable and thus has an extremely poor prognosis. We have found, however, that locoregionally administered trastuzumab armed with astatine‐211 (211At‐trastuzumab) is effective against human epidermal growth factor receptor 2 (HER2)‐positive PMGC in a xenograft mouse model. We first observed that 211At‐trastuzumab can specifically bind and effectively kill NCI‐N87 (N87) cells, which are HER2‐positive human metastatic GC cells, both in vitro and in s.c. tumors. We established a PMGC mouse model using N87 xenografts stably expressing luciferase to test α‐particle radioimmunotherapy with 211At‐trastuzumab against PMGC. Biodistribution analysis in this PMGC mouse model revealed that the i.p. administration of 211At‐trastuzumab (1 MBq) was a more efficient means of delivery of 211At into metastatic tumors than i.v. injection; the maximum tumor uptake with i.p. administration was over 60% injected dose per gram of tissue (%ID/g) compared to approximately 18%ID/g with i.v. injection. Surprisingly, a single i.p. injection of 211At‐trastuzumab (1 MBq) was sufficient to completely eradicate intraperitoneally disseminated HER2‐positive GC xenografts in two of six treated mice by inducing DNA double‐strand breaks, and to drastically reduce the tumor burden in another three mice. No bodyweight loss, leukocytopenia, or significant biochemical changes in liver or kidney function were observed in the treatment group. Accordingly, locoregionally administered 211At‐trastuzumab significantly prolonged the survival time of HER2‐positive PMGC mice compared with control treatments. Our results provide a proof‐of‐concept demonstration that locoregional therapy with 211At‐trastuzumab may offer a new treatment option for HER2‐positive PMGC. 相似文献
1000.