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81.
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结肠镜检查患者健康需求调查分析 总被引:1,自引:0,他引:1
结肠镜检查是目前诊断结肠疾病最常用的方法,但检查有一定痛苦。为确保检查安全和最大限度的满足患者的需要,真正体现“以患者为中心”的护理理念,我们对行结肠镜检查97例患者的健康需求进行了调查,现报告如下。 相似文献
83.
Objective: To investigate the properties of screwbone interface of expansive pedicle screw (EPS) in osteoporotic sheep by micro-CT and histological observation.
Methods: Six female sheep with bilateral ovariectomyinduced osteoporosis were employed in this experiment. After EPS insertion in each femoral condyle, the sheep were randomly divided into two groups: 3 sheep were bred for 3 months (Group A), while the other 3 were bred for 6 months (Group B). After the animals being killed, the femoral condyles with EPS were obtained, which were three-dimensionally-imaged and reconstructed by micro-CT. Histological evalu-ation was made thereafter.
Results: The trabecular microstructure was denser at the screw-bone interface than in the distant parts in expan-sive section, especially within the spiral marking. In the non- expansive section, however, there was no significant differ-ence between the interface and the distant parts. The regions of interest (ROI) adjacent to EPS were reconstructed and analyzed by micro-CT with the same thresholds. The three-dimensional (3-D) parameters, including tissue min- eral density (TMD), bone volume fraction (BVF, BV/TV), bone surface/bone volume (BS/BV) ratio, trabecular thickness (Tb.Th), and trabecular separation (Tb.Sp), were sig- nificantly better in expansive sections than non-expan-sive sections (P 〈 0.05). Histologically, newly-formed bony trabeculae crawled along the expansive fissures and into the center of EPS. The newly-formed bones, as well as the bones at the bone-screw interface, closely contacted with the EPS and constructed four compartments. Conclusions: The findings of the current study, based on micro-CT and histological evaluation, suggest that EPS can significantly provide stabilization in osteoporotic cancellous bones. 相似文献
Methods: Six female sheep with bilateral ovariectomyinduced osteoporosis were employed in this experiment. After EPS insertion in each femoral condyle, the sheep were randomly divided into two groups: 3 sheep were bred for 3 months (Group A), while the other 3 were bred for 6 months (Group B). After the animals being killed, the femoral condyles with EPS were obtained, which were three-dimensionally-imaged and reconstructed by micro-CT. Histological evalu-ation was made thereafter.
Results: The trabecular microstructure was denser at the screw-bone interface than in the distant parts in expan-sive section, especially within the spiral marking. In the non- expansive section, however, there was no significant differ-ence between the interface and the distant parts. The regions of interest (ROI) adjacent to EPS were reconstructed and analyzed by micro-CT with the same thresholds. The three-dimensional (3-D) parameters, including tissue min- eral density (TMD), bone volume fraction (BVF, BV/TV), bone surface/bone volume (BS/BV) ratio, trabecular thickness (Tb.Th), and trabecular separation (Tb.Sp), were sig- nificantly better in expansive sections than non-expan-sive sections (P 〈 0.05). Histologically, newly-formed bony trabeculae crawled along the expansive fissures and into the center of EPS. The newly-formed bones, as well as the bones at the bone-screw interface, closely contacted with the EPS and constructed four compartments. Conclusions: The findings of the current study, based on micro-CT and histological evaluation, suggest that EPS can significantly provide stabilization in osteoporotic cancellous bones. 相似文献
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85.
目的:观察人体肩袖组织中机械性力学感受器的形态及分布,阐明力学感受器在诱导肩关节稳定性保护机制中所起的重要作用。方法:取6具成年男尸的6套完整肩袖,按肩胛下肌,冈上肌,冈下肌,小圆肌分成6组,用HE和改良银染色方法分别对肩袖组织连续切片进行染色,通过光学显微镜观察感受器的形态,并用特定的计算机成像系统分析,从而获取不同肩袖组织中力学感受器的分布数量。结果:在肩袖组织中,发现存在4种类型的力学感受器。Pacini小体,Ruffini小体,Golgi腱器官及游离神经末梢。其中肩胛下肌内上述四种感受器的分布数量分别为6-9个,3-4个,1-3个,7-11个,冈上肌内分别为5-7个,2-3个,1-3个,7-9个,冈下肌内分别为2-3个,0个,1-3个,6-8个,小圆肌内分别为1-3个,0个,1-3个,4-5个。结论:肩袖组织中存在着4种类型的机械性力学感受器,根据力学感受器在不同肩袖组织中分布数量的多少与该组织随的生物学应务大小成正相关,说明它们在肩关节稳定性保护机制中起重要作用。 相似文献
86.
目的观察肌肉挛缩和关节活动度的改变与肌间结缔组织变化的关系。探讨肢体延长中张应力对肌间结缔组织显微结构的影响。方法建立兔胫骨延长模型,延长速度为1和2mm/d,每12h一个增量,延长率为胫骨长度的10%和20%。以苦味酸天狼猩红染色法染色,测量肌束膜厚度、观察肌束膜Ⅰ、Ⅲ型胶原,并以图像分析系统分析二者含量的比例变化,并进行统计学处理(SPSS)。结果在偏光显微镜下正常肌束膜主要由Ⅰ型胶原构成,肢体延长后,Ⅲ型胶原相对含量增加,而延长速率1mm/d的肌束膜胶原构成最接近正常;1mm/d10%延长率厚度变化无明显差异(P>0.05),1mm/d20%延长率者肌束膜厚度增加(0.01
相似文献
87.
88.
目的 探讨血清小而密低密度脂蛋白(sdLDL)水平对颈动脉中内膜厚度(CA-IMT)的影响.方法 行颈部动脉血管超声检查患者217例分为正常组(A组,113例,CA-IMT<0.9 mm)和增厚组(B组,104例,0.9m≤CA-IMT≤1.5mm).检测并分析血清sdLDL水平与CA-IMT增厚程度的相关性.结果 B组血清sdLDL水平高于A组[(1.0±0.3)mmol/L vs.(0.8±0.4)mmol/L](P<0.05).sdLDL水平增高者发生CA-IMT增厚的可能性是其正常者发生增厚的3.80倍.sdLDL水平与CA-IMT的增厚程度呈正相关(r=0.757,P<0.01).结论 血清sdLDL增高是CA-IMT增厚的危险因素,与CA-IMT厚度有较高的相关性. 相似文献
89.
显微CT与组织切片技术在骨形态计量研究中的比较 总被引:1,自引:0,他引:1
[目的]通过比较显微CT技术与组织切片技术在骨形态计量分析中的差异,探讨显微CT在骨形态三维结构研究方面的技术优势.[方法]分别应用显微CT和组织切片技术分析不同类型的骨组织标本,并从标本处理、表达形式与测试指标等方面比较两者的差异.[结果]显微CT在反映骨组织三维结构特征和对骨组织"量"与"质"变化的精确测量方面明显优于组织切片技术;而组织切片技术对反映标本局部的细胞形态和生长发育变化等方面则更具优势.[结论]显微CT技术在标本处理、表达形式两方面均提供了全新的测试手段,通过结合组织切片技术能够更加理想地反映骨组织形态和结构的特点. 相似文献
90.
目的 探讨H2O2处理时间对牛松质骨粒生物学特性的影响.方法 健康24月龄秦川牛10头,雌雄不限,体重150~170 kg.取牛肱骨头松质骨,切割成5 mm×5 mm×5 mm大小骨粒,分别以8.8 mol/L H2O2浸泡0、12、24、36、48、60、72 h后,行灰化组分测定、扫描电镜观察、X射线能谱分析及显微CT观察,研究牛松质骨粒的组分、结构、骨质及骨量变化.结果 随H2O2:处理时间延长,骨粒有机物含量逐渐减少,0~24 h和60~72 h有机物含量差异有统计学意义(P<0.05)24~60 h无明显变化(P>0.05).骨粒中钙、磷元素含量逐渐减少,60h后几乎检测不到(P<0.05).骨密度、骨矿物质含量呈下降趋势,且60 h后下降明显(P<0.05);骨小梁逐渐变细,骨小梁分离度增加.结论 H2O2能有效去除异种骨粒中有机物抗原成分,但处理时间超过60 h会严重破坏骨粒组分和结构,故合理掌握处理时间对消除异种骨移植替代物抗原性并维持其生物学特性具有重要意义. 相似文献