全文获取类型
收费全文 | 152篇 |
免费 | 30篇 |
国内免费 | 7篇 |
专业分类
儿科学 | 12篇 |
妇产科学 | 4篇 |
基础医学 | 67篇 |
口腔科学 | 3篇 |
临床医学 | 14篇 |
内科学 | 15篇 |
神经病学 | 7篇 |
特种医学 | 24篇 |
外科学 | 6篇 |
综合类 | 1篇 |
预防医学 | 11篇 |
药学 | 19篇 |
1篇 | |
肿瘤学 | 5篇 |
出版年
2023年 | 1篇 |
2021年 | 2篇 |
2020年 | 1篇 |
2016年 | 2篇 |
2015年 | 5篇 |
2014年 | 3篇 |
2013年 | 3篇 |
2012年 | 4篇 |
2011年 | 2篇 |
2010年 | 3篇 |
2009年 | 6篇 |
2008年 | 4篇 |
2007年 | 9篇 |
2006年 | 4篇 |
2005年 | 8篇 |
2004年 | 3篇 |
2003年 | 5篇 |
2002年 | 3篇 |
2001年 | 4篇 |
2000年 | 5篇 |
1999年 | 5篇 |
1998年 | 5篇 |
1997年 | 4篇 |
1996年 | 12篇 |
1995年 | 4篇 |
1994年 | 6篇 |
1993年 | 3篇 |
1992年 | 2篇 |
1991年 | 1篇 |
1990年 | 3篇 |
1989年 | 7篇 |
1988年 | 8篇 |
1987年 | 5篇 |
1986年 | 5篇 |
1985年 | 7篇 |
1984年 | 3篇 |
1983年 | 4篇 |
1982年 | 5篇 |
1981年 | 1篇 |
1980年 | 2篇 |
1979年 | 3篇 |
1978年 | 1篇 |
1977年 | 2篇 |
1976年 | 1篇 |
1975年 | 1篇 |
1974年 | 1篇 |
1973年 | 5篇 |
1971年 | 1篇 |
1969年 | 3篇 |
1967年 | 2篇 |
排序方式: 共有189条查询结果,搜索用时 15 毫秒
81.
82.
83.
New diphosphonate compounds for skeletal imaging: comparison with methylene diphosphonate 总被引:2,自引:0,他引:2
Subramanian G; McAfee JG; Thomas FD; Feld TA; Zapf-Longo C; Palladino E 《Radiology》1983,149(3):823-828
Three-hour biodistribution of Tc-99m complexes of six diphosphonates was compared in rabbits with tibial lesions to determine which was best for detection of focal bone lesions. Sr-85 was used as a standard. N,N-dimethylaminomethylene diphosphonate (DMAD) was the only agent with a higher lesion/normal bone ratio than methylene diphosphonate (MDP), attributable to lower concentration in normal bone. Hydroxymethane diphosphonate (HDP) and 2,3-dicarboxypropane-1, 1-diphosphonate (DPD) demonstrated higher concentration than MDP in normal bone without improving lesion contrast. They also exhibited much higher uptake in the liver and kidney, as well as muscle and red marrow in the case of DPD. None was superior to MDP as an all-purpose skeletal agent, though others may be better for specific applications. 相似文献
84.
85.
Steckley RA; Kronenberg MW; Born ML; Rhea TC; Bateman JE; Rollo FD; Friesinger GC 《Radiology》1982,142(1):179-185
Regional wall motion (RWM) abnormalities are sensitive indicators of left ventricular (LV) dysfunction, but quantitation of RWM with gated radionuclide ventriculography (RVG) has been limited, particularly in the left anterior oblique (LAO) projection. Regional LV performance was studied in 18 patients undergoing LAO RVG immediately prior to contrast ventriculography (CVG). Wall motion was analyzed by semiautomated and visual methods using several coordinate systems. For semiautomated methods, RVG and CVG wall motion were closely related in the two 90 degrees polar sectors at the apex and posterior wall (r = .85) and in the five 45 degrees polar sectors from midseptum through posterior wall (r = .82). The basal sectors on RVG had weak relationship to CVG, due to adjacent vascular structures. Semiautomated and visual grades for polar sectors on both CVG and RVG were closely related (r = .88- .94). Measured regional wall motion on LAO RVG compared favorably with near-simultaneous CVG in nonoverlapping portions of the LV and allowed objective quantitation of regional LV performance. 相似文献
86.
Heidrun?B?SturmEmail author Wiek?H?van Gilst Karl?Swedberg FD?Richard?Hobbs Flora?M?Haaijer-Ruskamp 《BMC health services research》2005,5(1):57
Background
Major international differences in heart failure treatment have been repeatedly described, but the reasons for these differences remain unclear. National guideline recommendations might be a relevant factor. This study, therefore, explored variation of heart failure guideline recommendations in Europe. 相似文献87.
88.
No evidence of a major locus for benign familial infantile convulsions on chromosome 19q12-q13.1 总被引:6,自引:0,他引:6
Gennaro E Malacarne M Carbone I Riggio MC Bianchi A Bonanni P Boniver C Dalla Bernardina B De Marco P Giordano L Guerrini R Santorum E Sebastianelli R Vecchi M Veggiotti P Vigevano F Bricarelli FD Zara F 《Epilepsia》1999,40(12):1799-1803
PURPOSE: A locus for benign familial convulsions (BFICs) has been recently mapped on chromosome 19q12-13.1 by studying five families of Italian descent. The main goal of this study was to investigate the role of this locus in a set of seven newly identified families with at least three affected cases. METHODS: Five polymorphic microsatellite markers covering the BFIC locus on chromosome 19q have been typed, and parametric linkage analysis has been performed to analyze the segregation of the BFIC locus within our families. RESULTS: Cumulative 2-point lod scores and multipoint analysis showed no evidence of linkage between chromosome 19 markers and the BFIC phenotype. The analysis of family-specific 2-point lod scores and haplotypes, however, indicated the presence of linkage to chromosome 19q in a single family, suggesting genetic heterogeneity within our family sample. CONCLUSIONS: Our study demonstrates that the previously reported BFIC locus on chromosome 19q12-13.1 is not a major locus for BFICs. We suggest that genetic heterogeneity may have generated our discordant linkage findings, as it was reported in benign familial neonatal convulsions, a related idiopathic mendelian syndrome. 相似文献
89.
Prenatal diagnosis of bullous ichthyosiform erythroderma: detection of tonofilament clumps in fetal epidermal and amniotic fluid cells. 下载免费PDF全文
R A Eady D B Gunner L D Carbone F D Bricarelli C M Gosden C H Rodeck 《Journal of medical genetics》1986,23(1):46-51
The prenatal diagnosis of bullous ichthyosiform erythroderma (BIE) has been achieved at 20 weeks' gestation by electron microscopic identification of a pathognomonic cytoskeletal abnormality within fetal epidermal cells obtained by fetoscopic skin biopsy. The same abnormality was also observed in skin derived amniotic fluid cells. The question whether amniocentesis might be used instead of fetoscopy for future prenatal detection of BIE is discussed. 相似文献
90.
Stephen M Campbell Ahmet Fuat Nick Summerton Neil Lancaster FD Richard Hobbs 《The British journal of general practice》2011,61(588):e427-e435