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1.
目的观察银杏叶提取物注射液治疗突发性耳聋的有效性及药理作用分析。方法选取我院自2019年1月~2020年6月收治的突发性耳聋患者80例,随机分为实验组和对照组,每组40例。两组均进行常规治疗和辅助治疗,对照组采取静脉滴注丹参注射液联合低分子右旋糖酐氨基酸注射液治疗,实验组采取静脉银杏叶提取物注射液联合低分子右旋糖酐氨基酸注射液治疗。比较两组患者临床治疗效果和不良反应发生情况。结果经过治疗发现,实验组有效率97.5%,显著高于对照组82.5%,差异具有统计学意义(P<0.05)。实验组出现恶心呕吐不良反应仅1例,不良反应发生率为2.5%;对照组出现4例恶心呕吐、2例乏力以及2例头晕,不良反应发生概率为20.0%。实验组不良反应发生概率显著低于对照组,具有统计学意义(P<0.05)。结论突发性耳聋采用银杏叶提取物注射液治疗对提高治疗有效率有显著效果,并且不良反应发生概率低,值得临床推广使用。  相似文献   
2.
Background: Multiple myeloma (MM) is a hematological bone marrow malignancy that can be treated but is usually fatal. Medication resistance is the major cause of relapses due to cancer stem cells (CSCs). As a result, this study aimed to identify multiple myeloma cancer stem cells (MMCSCs) in the bone marrow of twelve MM patients with pathological complete response (pCR) after chemotherapy and to investigate the potential effect of Curcumin/Piperine (C/P) extract as an anti-MMCSCs treatment in twenty newly diagnosed patients. Methods: This study included twenty bone marrow (BM) samples from newly diagnosed MM patients and twelve BM samples from pCR patients after a year of treatment. The MTT test was performed to assess the treatment’s effective dosage. A flow cytometer was used to identify MMCSCs, cell cycle profile, extract’s apoptotic activity, and proliferation marker in the selected samples. Also,  a colony formation test and stemness protein were investigated. Results: In newly diagnosed MM patients, the C/P extract suppressed MMCSCs by 64.71% for CD138-/CD19- and 38.31% for CD38++. In MM patients’ samples obtained after one year of treatment, the MMCSCs inhibition percentage reached 44.71% (P < 0.008) for CD138-/CD19- and 36.94% (P < 0.221) for CD38++. According to cell cycle analyses, the number of cells treated with C/P extract was significantly reduced in the S and G0/G1 phases (87.38%: 35.15%, and 4.83%: 2.17% respectively), with a rapid increase in the G2/M phases (1.1%: 2.2%.). MMCSCs apoptosis was identified using a flow cytometer and Annexin-V. Multiple myeloma stem cell (MMCSC) proliferation was inhibited. Clonogenicity was suppressed by 60%, and stemness protein expression was reduced by 70%. Conclusion: MMCSCs in the bone marrow of MM-pCR patients can be utilized as a prognostic tool to predict recurrent multiple myeloma incidence. Also, the therapeutic potential of C/P extract as a prospective anti-MM drug targeting MMCSCs.  相似文献   
3.
In the present study, we aimed to observe the effects of ethanol extract of Oxalis corniculata L. on bleeding time (BT) and coagulation time (CT) and determine its acute toxicity in mice. Firstly, the ethanol extract of O. corniculata was administered to 40 mice, which were randomly divided into the normal control group, Yunnan Baiyao control group, low-dose group, and high-dose group. The low-dose (0.6 g/kg) and high-dose (1.2 g/kg) groups received ethanol extract of O. corniculata by gavage, and the BT and CT of the mice were measured by the slide method and tail clipping method, respectively. Secondly, the median lethal dose method was used with 50 mice to observe the physiological state, poisoning reaction, and death of the mice after intragastric administration. Finally, on the 14th day of the experiment, a necropsy was performed to observe any abnormality of the organs. In conclusion, in the coagulation and hemostasis tests, there were no statistical differences between the groups (P > 0.05), while there was a significant dose-response relationship, and the BT and CT were significantly shorter than those of the negative control group, which were comparable to the Yunnan Baiyao control group. Moreover, in the acute toxicity test, the median lethal dose of ethanol extract of O. corniculata was 6.0291 g/kg, with a 95% confidence interval of 5.3065–6.7829 mg/kg.  相似文献   
4.
王静  卓思思  乔楠 《天津中医药》2021,38(10):1338-1344
[目的] 研究泽兰提取物对低糖低氧所致神经细胞损伤的影响及潜在分子机制。[方法] 用PC12细胞建立脑缺血模型,然后用0.1、1、10 mg/mL的泽兰提取物对模型细胞进行处理,噻唑蓝(MTT)法测定PC12细胞的光密度(OD)值,蛋白免疫印迹法(Western blot)检测N-Myc下游调控基因2(NDRG2)、细胞周期蛋白1(Cyclin D1)、p21、Bax和Bcl-2蛋白表达,流式细胞术测定细胞凋亡率。[结果] 与对照组相比,1 mg/mL和10 mg/mL泽兰提取物均可使模型组PC12细胞OD值升高,CyclinD1和Bcl-2表达升高,NDRG2、p21和Bax表达降低,促细胞增殖并抑制细胞凋亡;抑制NDRG2表达可促进模型组PC12细胞增殖并抑制细胞凋亡;过表达NDRG2可逆转泽兰提取物对模型组PC12细胞增殖和凋亡的作用。[结论] 泽兰提取物通过抑制NDRG2表达促进神经细胞脑缺血损伤模型细胞PC12增殖,抑制细胞凋亡。泽兰提取物可能对神经细胞脑缺血损伤具有潜在的治疗作用。  相似文献   
5.
目的:观察人参-三七-川芎提取物对延缓内皮微粒(EMPs)诱导的血管内皮细胞衰老的影响,并探索其作用机制。方法:以人脐静脉内皮细胞(HUVECs)为研究对象,复制性衰老10~12代细胞作为衰老模型,实验分为年轻组(2~4代细胞)、衰老组(10~12代细胞)、单纯EMPs干预组(提取衰老细胞产生的EMPs来干预年轻细胞)以及中药低、中、高剂量组(200,300,400 mg·L-1)。结合衰老相关β半乳糖苷酶(SA-β-gal)染色法和碘化丙啶(PI)单染法检测细胞周期来判断细胞衰老程度。采用细胞活性和细胞增殖检测(CCK-8)法筛选给药浓度,两步离心法分离出EMPs,藻红蛋白(PE)CD31抗体或异硫氰酸荧光素(FITC)Annexin V标记分离得到的EMPs,并用流式细胞术进行定量,2’,7’-二氯荧光素二乙酸酯(DCFDA)染色检测细胞内活性氧(ROS)水平。结果:与衰老组比较,中药给药组可显著降低衰老细胞SA-β-gal活性(P<0.01),使细胞周期S期阻滞得到恢复(P<0.01),并降低衰老细胞分泌CD31+EMPs及Annexin V+EMPs的数量(P<0.05)。与年轻组比较,单纯EMPs干预组可诱导年轻细胞SA-β-gal活性增强(P<0.01),细胞周期阻滞于S期(P<0.05),与衰老组比较,但在EMPs干预的同时给予中药干预后,可明显抑制EMPs介导增强的SA-β-gal活性(P<0.05),并使S期阻滞得到恢复。中药组还可明显抑制EMPs诱导的细胞内ROS增高(P<0.05,P<0.01)。结论:人参-三七-川芎提取物可通过影响EMPs延缓复制性血管内皮细胞衰老,其机制可能与抑制EMPs诱导的细胞内ROS水平增高有关。  相似文献   
6.
ObjectiveThe aim of the study was to investigate the effects of a novel polymerizable collagen cross-linker methacrylate-functionalized proanthocyanidins (MAPA) on the polymerization, microhardness and leaching of a HEMA-based experimental dental adhesive system.MethodsThree MAPAs were synthesized using different methacrylate (MA) to proanthocyanidins (PA) feeding ratios of 1:2, 1:1, and 2:1 to obtain MAPA-1, MAPA-2, and MAPA-3, respectively. The resulting three MAPAs and PA were added to an experimental adhesive formulated with HEMA and a tri-component photoinitiator system (0.5 wt% CQ/EDMAB/DPIHP) at 1%, 5% and 10% MAPA or PA concentrations (wt%). The adhesive polymerization kinetics was measured continuously in real-time for 10 min using a Fourier-transform infrared spectroscopy (FTIR) with an attenuated total reflectance (ATR) accessory. Degree of conversion (DC) and Vickers microhardness (MH) of cured adhesives were measured at 72 h post-cure. The leaching of cured adhesives in DI water was monitored using UV–vis spectrophotometer. Statistical analysis was performed using one-way and two-way ANOVA, Tukey’s (p < 0.05).ResultsThe adhesive formulations with 1%, 5% and 10% MAPAs-1, -2, -3 all generated higher rate of polymerization and 10-min DC than the formulations with PA at the same concentrations. At 72 h post-cure, the adhesive formulation with 5% MAPA-2 exhibited significantly higher DC (99.40%) and more than doubled MH (18.93) values than the formulation with 5% PA (DC = 89.47%, MH = 8.41) and the control (DC = 95.46%, MH = 9.33). Moreover, the cured adhesive with 5% MAPA-2 demonstrated significantly reduced PA leaching in comparison with cured adhesive with 5% PA.SignificanceSynthesized MAPA is a novel class of polymerizable collagen cross-linker that not only stabilizes dentin collagen via its PA component, but also improves polymerization, mechanical properties and stability of HEMA-based adhesives via its MA component. By inheriting the benefit while overcoming the drawback of PA, MAPA offers a revolutionary solution for improved bond-strength and longevity of dental restorations.  相似文献   
7.
ObjectivesHigh blood pressure (BP) is a major risk factor for cardiovascular disease and prevalence rates continue to rise with ageing populations. Polypharmacy remains a burden among the ageing, thus alternative effective strategies are warranted. This study investigated the effects of a polyphenols rich dietary supplement containing Pinus massoniana bark extract (PMBE) for modulating BP in healthy Australian adults.DesignThis study is a secondary analysis of data from a double-blinded, placebo-controlled clinical trial.MethodsSixty-two healthy adults aged 55–75 years were randomized to receive 50 mL dietary supplement containing placebo (0 mg PMBE) or PMBE (1322 mg PMBE) daily for 12 weeks. Seated systolic BP (SBP) and diastolic (DBP) were measured at baseline, 6 weeks and 12 weeks. Effects of PMBE on modulating BP was also explored in this study stratified for SBP status (optimal v high) as well as by SBP medication status. Mixed effect regression modelling was employed involving fixed categorical effects for elapsed time, treatment assignment and their interaction as well as random subject-level intercept to account for within-subject correlations resulting from repeated measurements. Significant models were further examined by addition of covariates and power calculations were performed since this study was a secondary analysis.ResultsSBP significantly reduced (−3.29 mmHg, p = 0.028) after PMBE at 12 weeks compared to baseline. SBP in individuals with normal-high SBP (>120 mmHg) in the PMBE group reduced by − 6.46 mmHg (p = 0.001) at 12 weeks compared to baseline. No significant changes were reported for individuals with optimal (≤120 mmHg) SBP nor did DBP significantly change in either study groups. In individuals with non-medicated normal-high SBP, SBP significantly reduced by − 7.49 mmHg (p = 0.001) and DBP by − 3.06 mmHg (p = 0.011) at 12 weeks compared to baseline after PMBE. Cross-group comparisons were not statistically different.ConclusionsA polyphenol-rich dietary supplement derived from PMBE led to a clinically and statistically significant reduction in SBP in adults. Future studies to investigate the effects of PMBE-polyphenol supplementation on BP are warranted to confirm and explore optimal dose and impact on hypertension.  相似文献   
8.
目的:探讨阿霉素(ADR)诱导人肾小管上皮细胞(HK-2)发生氧化损伤后,紫苏叶水提取物(PFAE)对其细胞活性、氧化损伤标记物及细胞凋亡等关键因子的影响。方法:ADR刺激HK-2细胞建立损伤模型,使用N-乙酰半胱氨酸(NAC)或不同浓度PFAE(5,15,45 g·L~(-1))干预后,采用细胞增殖/毒性检测(CCK-8)法检测细胞存活率,结合光镜下细胞形态变化,筛选出PFAE保护细胞的最佳浓度。后续实验分为6组:空白组,ADR(0.05 g·L~(-1))组,PFAE(15 g·L~(-1))组,ADR+PFAE(0.05+15)g·L~(-1)组,NAC(0.81 g·L~(-1))组,ADR+NAC(0.05+81)g·L~(-1)组。检测细胞匀浆中的丙二醛(MDA),超氧化物歧化酶(SOD)和细胞总抗氧化能力,2',7'-二氯荧光黄双乙酸盐(DCFH-DA)荧光探针检测细胞内活性氧(ROS)水平,流式细胞术及脱氧核糖核苷酸末端转移酶(TUNEL)染色法检测细胞凋亡率,蛋白免疫印迹法(Western blot)检测细胞线粒体凋亡相关蛋白B淋巴细胞瘤-2基因(Bcl-2),Bcl-2相关X蛋白(Bax),半胱氨酸天冬氨酸蛋白酶9和3(Caspase-9,Caspase-3),聚腺苷二磷酸-核糖聚合酶(PARP)包括其剪切体的表达,及丝裂原活化蛋白激酶(MAPK)信号转导通路中p38丝裂素活化蛋白激酶(p38 MAPK),细胞外信号调节激酶(ERK),c-Jun氨基端激酶(JNK)及其磷酸化蛋白的表达。结果:与空白组比较,ADR组的细胞活性显著降低(P0.01),与ADR组比较,5,15 g·L~(-1)的PFAE和NAC能促进细胞的增殖(P0.01)。与空白组比较,ADR组抗氧化能力和SOD水平显著降低(P0.01),MDA和ROS的水平显著增高(P0.01),与ADR组比较,ADR+PFAE组和ADR+NAC组抗氧化能力和SOD水平显著升高(P0.01),MDA和ROS的水平显著下降(P0.01)。与空白组比较,ADR组细胞凋亡率上升(P0.01),凋亡相关蛋白Bax/Bcl-2,cleaved Caspase-9/Caspase-9,cleaved Caspase-3/Caspase-3,cleaved PARP/PARP水平显著上升(P0.01),MAPKs通路中的p38 MAPK,ERK和JNK的磷酸化蛋白表达明显增高(P0.05,P0.01);与ADR组比较,PFAE或NAC干预后减轻了细胞凋亡率,降低了凋亡蛋白的相对比值,并且抑制了MAPK信号通路中p38 MAPK,ERK蛋白的磷酸化(P0.01),但对磷酸化的JNK蛋白表达无影响。结论:PFAE可以减轻ADR诱导的HK-2细胞氧化损伤,并发挥抗氧化作用,通过线粒体凋亡途径和ERK/p38 MAPK信号通路来抑制细胞凋亡。  相似文献   
9.
10.
目的:制备马黄酊复方提取物凝胶并研究其抗炎活性。方法:利用减压干燥法制备马黄酊复方提取物;分别取0.5%、1.0%、1.5%用量的卡波姆来制备凝胶基质,以确定具有最佳涂布性能的凝胶基质中卡波姆的用量;将马黄酊复方提取物、尼泊金甲酯等加入空白凝胶基质中,搅拌均匀,制备复方凝胶剂;以耳肿胀和足跖肿胀试验初步测定马黄酊凝胶的抗炎活性。结果:通过观察凝胶均匀性、细腻度、黏稠度、舒适度等,发现质量百分比浓度1%卡波姆空白凝胶较为适宜作为凝胶基质,制备的马黄酊复方提取物凝胶外观颜色均匀,涂布性能良好;5%与10%马黄酊复方提取物凝胶显示出较好的抗炎活性。结论:马黄酊复方提取物凝胶处方和制备工艺可行,质量稳定,具有较好的抗炎活性。  相似文献   
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