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981.
982.
Lee DY Seo KH Lee DS Kim YC Chung IS Kim GW Cheoi DS Baek NI 《Journal of natural products》2012,75(6):1138-1144
Eight new 3,4-seco-lupane triterpenes and glycosides, acanthosessiligenins I and II (1, 3) and acanthosessiliosides A-F (2, 4-8), as well as six known 3,4-seco-lupane triterpenes (9-14) were isolated from an ethanolic extract of Acanthopanax sessiliflorus fruits. The chemical structures of 1-8 were determined by spectroscopic data interpretation. All isolated compounds were tested for their cytotoxicity against six human cancer cell lines and their ability to inhibit LPS-induced nitric oxide production in RAW 264.7 macrophages. 相似文献
983.
Ju HK Lee HW Chung KS Choi JH Cho JG Baek NI Chung HG Lee KT 《Journal of ethnopharmacology》2012,141(1):460-468
Ethnopharmacological relevance
Artemisia princeps Pampanini is widely used in Eastern traditional medicine for the treatment of circulatory disorders, such as, dysmenorrhea, hematuria, hemorrhoids, and inflammation, and is also used to treat chronic conditions, such as, cancers, ulcers, and digestive disorders.Aim of the study
The purpose of this study is to investigate the effect of a standardized flavonoid-rich fraction of Artemisia princeps Pampanini cv. Sajabal (FRAP) on the induction of apoptosis and the molecular mechanism involved in human cervical cancer HeLa cells.Materials and methods
Human cervical cancer HeLa cells were treated with FRAP and apoptosis was detected by cell morphologic observation, annexin-V-PI staning and western blot analysis on the expression of protein associated with cell death.Results
FRAP led to the cleavages of caspase-3, -8, and -9 and the cleavage of poly (ADP-ribose) polymerase (PARP) in HeLa cells. Caspase-3 inhibitor (z-DEVD-fmk), caspase-8 inhibitor (z-IETD-fmk), caspase-9 inhibitor (z-LEHD), and broad caspase inhibitor (z-VAD-fmk) significantly suppressed the FRAP-induced accumulation of annexin V positive cells. Furthermore, it was found that FRAP caused a loss of mitochondrial membrane potential (MMP) and the release of cytochrome c to the cytosol. Furthermore, the overexpression of Bcl-xL significantly prevented FRAP-induced apoptosis, MMP changes, and the activations of caspase-3, -8, and -9. Interestingly, pretreatment with caspase-8 inhibitor significantly reduced the FRAP-induced activation of caspase-3 but not that of caspase-9, whereas the caspase-3 inhibitor, z-DEVD-fmk, markedly attenuated the FRAP-induced activation of caspase-8. In BALB/cnu/nu mice bearing a HeLa xenograft, FRAP dosed at 25 or 50 mg/kg significantly inhibited tumor growth.Conclusion
Our results indicate caspase-mediated activation of the mitochondrial death pathway plays a critical role in the FRAP-induced apoptosis of HeLa cells and that FRAP inhibits the in vivo tumor growth of HeLa xenograft mice. 相似文献984.
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988.
Yeon Hee Park Seung Tae Kim Eun Yoon Cho Yoon La Choi Oh-Nam Ok Hae Jin Baek Jeong Eon Lee Seok Jin Nam Jung-Hyun Yang Won Park Doo Ho Choi Seung Jae Huh Jin Seok Ahn Young-Hyuck Im 《Breast cancer research and treatment》2010,119(3):653-661
As the use of screening mammography expands, the proportion of invasive breast cancer ≤1 cm is increasing. The aims of this study were: (1) to identify risk factors for systemic metastases in patients with ≤1 cm invasive breast cancer and (2) to investigate the patient groups at the greatest risk for metastases with such small tumors. Data were collected retrospectively from the breast cancer registry of our institution for patients with invasive breast cancer from October 1994 to December 2004. Of 4,036 patients who received curative breast cancer surgery, we identified 427 patients who had T1a or T1b breast cancer excluding 39 patients who received neoadjuvant chemotherapy. Ipsilateral axillary lymph node involvement was found in 13% (57/427) of patients at the time of surgery. A multivariate analysis was conducted in 370 (T1aN0, T1bN0) patients without lymph node involvement. In a Cox-regression model, HER-2 positive and triple negative (TN) groups were identified as independent risk factors to predict distant relapse-free survival (DRFS) [Hazard ratio (HR) 8.8, P = 0.003 for HER-2 positive group; HR 5.1, P = 0.026 for TN group] in T1bN0 tumors. Statistical significance was not maintained when the analysis was limited to T1aN0 tumors. Even though T1aN0 and T1bN0 tumors have a relatively low risk of systemic failure, anti-HER-2-directed therapy for HER-2 group and new innovative adjuvant systemic treatment for TNBC patients with T1bN0 tumors should be considered. Prospective adjuvant trials are warranted in these subgroups of patients. 相似文献
989.
T-Y Jeon M-E Han Y-W Lee Y-S Lee G-H Kim G-A Song G-Y Hur J-Y Kim H-J Kim S Yoon S-Y Baek B-S Kim J-B Kim S-O Oh 《British journal of cancer》2010,102(4):710-718
Background:
Stathmin1 is a microtubule-regulating protein that has an important role in the assembly and disassembly of the mitotic spindle. The roles of stathmin1 in carcinogenesis of various cancers, including prostate and breast cancer, have been explored. However, its expression and roles in gastric cancer have not yet been described.Methods:
Stathmin1 expression in paraffin-embedded tissue sections from 226 patients was analysed by immunohistochemistry. Roles of stathmin1 were studied using a specific small interfering RNA (siRNA).Results:
The expression of stathmin1 was positively correlated with lymph node metastasis, TNM stages and vascular invasion, and negatively with recurrence-free survival, in the diffuse type of gastric cancer. The median recurrence-free survival in patients with a negative and positive expression of stathmin1 was 17.0 and 7.0 months, respectively (P=0.009). When the expression of stathmin1 was knocked down using siRNA, the proliferation, migration and invasion of poorly differentiated gastric cancer cells in vitro were significantly inhibited. Moreover, stathmin1 siRNA transfection significantly slowed the growth of xenografts in nude mice.Conclusion:
These results suggest that stathmin1 can be a good prognostic factor for recurrence-free survival rate and is a therapeutic target in diffuse-type gastric cancer. 相似文献990.
Dae Ho Lee MD Sang‐We Kim MD Cheolwon Suh MD Jung‐Shin Lee MD Jin Seok Ahn MD Myung‐Ju Ahn MD Keunchil Park MD Im‐Il Na MD Jae Cheol Lee MD Baek‐Yeol Ryoo MD Sung Hyun Yang MD 《Cancer》2010,116(1):132-136