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91.
The sonographic and pathological appearance of 13 cystic ovarian teratomas was reviewed. Twelve contained at least one mural nodule (dermoid plug) and one was completely cystic. Altogether there were 15 dermoid plugs, varying in consistency from homogeneous solid tissue to cystic. More than half were associated with hair and/or calcium. The nodules were round, ranged from 1 1/2 to 4 cm, formed an acute angle with the wall of the cyst, and tended to be entirely or predominantly hyperechoic. The authors suggest that most cystic teratomas contain dermoid plugs having a characteristic shape and hyperechoic pattern. 相似文献
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93.
Giant cell tumor of bone: radiographic changes following local excision and allograft replacement 总被引:1,自引:0,他引:1
The authors retrospectively evaluated the clinical records and radiographs obtained from 41 patients who had giant cell tumor of bone and who were treated by local resection and allograft replacement. Postoperative complications developed in 41% of the patients. However, the eventual clinical outcome was considered to be satisfactory in 85% of all cases. There were no instances of tumor recurrence, and surprisingly, postoperative arthritis was not a major problem. The major complications encountered were infection and allograft fracture; bone infection accounted for most of the clinical failures. All infections were associated with the increasing soft-tissue swelling and bone resorption detected on radiographic studies. Other radiographic parameters that were associated with an increased rate of complications included osteopenia, increased periosteal reaction, and decreased bone formation at the host-donor junction site. The clinical outcome was distinctly less favorable in those cases in which the patient had had a pathologic fracture or a previous resection, or in whom the graft was implanted at the distal radius. 相似文献
94.
95.
Individual variation of cortical surface area asymmetries 总被引:1,自引:0,他引:1
Asymmetries in the size of cortical regions are regularly associated with
functional lateralization. Assessment of cortical asymmetry is often
confounded by measurement artifact and a lack of information about the
normal variance of asymmetry in regions that are functionally symmetric. In
order to measure hemispheric asymmetries in the surface area of cortical
gyri, magnetic resonance (MR) images were acquired from 10 normal,
right-handed males. Computer representations of the cortical surface in all
20 hemispheres were reconstructed from the images by first creating a white
matter model and then 'inflating' it to approximate the cortical surface.
The advantage of this approach is that it accurately models the deep sulci
as well as the cortical surface. Surface area measurements of the whole
hemisphere, the postcentral and the cingulate gyrus were collected from
each subject. For each region an asymmetry score was computed based on the
difference in the surface area of the left and right regions. Many subjects
showed asymmetries in these two gyri; however, the mean asymmetry scores
were never significantly asymmetric. The large variability of individual
asymmetry scores indicates that cortical asymmetries may be present even in
the absence of clear functional asymmetry. An understanding of the degree
of asymmetry in structures that do not show clear functional lateralization
is critical for interpreting data gathered from cortical regions that are
functionally asymmetric.
相似文献
96.
Locally advanced and recurrent colon cancer was treated by irradiating first the pelvis and two hours later the upper abdomen. Curative treatment consisted of 4,000-5,000 rad (40-50 Gy) in 200-rad (2-Gy) fractions to the pelvis and 3,000 rad (30 Gy) in 150-rad (1.5-Gy) fractions to the upper abdomen. Palliative treatment consisted of 2,100 rad (21 Gy) in 300-rad (3-Gy) fractions to the liver, 3,000 rad (30 Gy) in 150-rad (1.5-Gy) fractions to the upper abdomen, and 4,000-5,000 rad (40-50 Gy) in 200-rad (2-Gy) fractions to the pelvis. Treatment was tolerated well, and acute toxicity was limited. Seven of the 11 patients treated curatively remain free of abdominal disease after 10-35 months; median survival among 9 patients treated palliatively was 9 months. 相似文献
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100.
华人、马来人及印度人的白介素4基因多态性与哮喘的关系 总被引:2,自引:0,他引:2
【目的】调查华人、马来人及印度人的白介素 4 基因多态性与哮喘和哮喘严重度是否有相关性。【方法】研究人群包括315名哮喘患者(华人 152,马来人 76,印度人 87) 和 360 名无哮喘病史的健康献血者(华人157,马来人100,印度人103) 。患者组进一步分为轻、中度哮喘组(FEV1>=60%预计值) 和重度哮喘组(FEV1<60%预计值) 。白介素4基因启动子(C 590T) 通过 PCR限制性扩增片段长度多态性(PCR RFLP)方法检测。统计学分析应用多元回归法检测白介素基因与哮喘的关系。【结果】在三种族人群中,白介素4(C 590T)基因型及等位基因与哮喘、哮喘严重度无相关性(P>0.05)。然而,华人的白介素 4(T590)等位基因(98.3%)显著高于马来人(84%)及印度人(35.9%)(P<0.01)。【结论】华人、马来人及印度人的白介素4(C 590T) 基因多态性与哮喘无关。然而,此基因多态性存在种族差异。 相似文献