全文获取类型
收费全文 | 379篇 |
免费 | 14篇 |
专业分类
儿科学 | 26篇 |
妇产科学 | 27篇 |
基础医学 | 32篇 |
口腔科学 | 5篇 |
临床医学 | 31篇 |
内科学 | 73篇 |
皮肤病学 | 16篇 |
神经病学 | 18篇 |
特种医学 | 3篇 |
外科学 | 77篇 |
综合类 | 18篇 |
预防医学 | 30篇 |
眼科学 | 2篇 |
药学 | 30篇 |
肿瘤学 | 5篇 |
出版年
2010年 | 2篇 |
2009年 | 2篇 |
2007年 | 3篇 |
2006年 | 2篇 |
1999年 | 2篇 |
1998年 | 3篇 |
1997年 | 6篇 |
1996年 | 4篇 |
1995年 | 7篇 |
1994年 | 7篇 |
1993年 | 7篇 |
1992年 | 6篇 |
1990年 | 7篇 |
1989年 | 7篇 |
1988年 | 10篇 |
1987年 | 4篇 |
1986年 | 5篇 |
1985年 | 5篇 |
1984年 | 2篇 |
1983年 | 4篇 |
1982年 | 1篇 |
1981年 | 3篇 |
1980年 | 2篇 |
1979年 | 3篇 |
1978年 | 5篇 |
1977年 | 7篇 |
1976年 | 5篇 |
1975年 | 4篇 |
1974年 | 8篇 |
1973年 | 1篇 |
1972年 | 3篇 |
1971年 | 1篇 |
1970年 | 3篇 |
1969年 | 1篇 |
1965年 | 3篇 |
1963年 | 4篇 |
1962年 | 1篇 |
1961年 | 1篇 |
1959年 | 30篇 |
1958年 | 41篇 |
1957年 | 36篇 |
1956年 | 26篇 |
1955年 | 31篇 |
1954年 | 23篇 |
1951年 | 1篇 |
1949年 | 13篇 |
1948年 | 31篇 |
1947年 | 4篇 |
1946年 | 1篇 |
1939年 | 1篇 |
排序方式: 共有393条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
The bradycardia produced by 1 microgram acetylcholine in the isolated perfused rabbit heart, in the presence of vecuronium and atracurium, was studied and compared with control. Vecuronium at a concentration of 2.5 micrograms/litre and atracurium 6 micrograms/litre did not enhance the negative chronotropic effect of acetylcholine. Atracurium produced a statistically significant inhibition of the negative chronotropic effect of acetylcholine. 相似文献
5.
R. M. R. BARNES M. S. LEWIS-JONES † S. ALLAN T. A. DIXON‡ C. F. H. VICKERS 《Clinical and experimental dermatology》1993,18(3):211-216
This study demonstrated that a major feature of childhood atopic eczema (AE) is the presence of serum IgG and IgE anti-house dust mite (anti-HDM) antibodies in almost all AE individuals. IgG anti-HDM antibodies, usually of the IgG1 isotype, became prevalent in AE children over the age of 4 years with the highest antibody levels in children in their early teens. In contrast, immunological sensitization to dietary antigens, notably milk and eggs, occurred in both AE children and age-matched non-atopic control children, and was often associated with IgG4 antibodies during early childhood. These became less prevalent with increasing age in control children but persisted in AE children, sometimes together with IgE antibodies. The later occurrence of anti-HDM antibodies in AE children could reflect immunological sensitization following inhalation of antigen, whereas sensitization to dietary antigens appears to be a natural event in early childhood. 相似文献
6.
7.
8.
9.
MUNSON A. E.; WHITE K. L. JR.; BARNES D. W.; MUSGROVE D. L.; LYSY H. H.; HOLSAPPLE M. P. 《Toxicological sciences》1988,10(4):691-700
An Immunotoxicological Evaluation of 4,4'-Thiobis-(6-t-butyl-m77-cresol)in Female B6C3F1 Mice. 1. Body and Organ Weights, Hematology,Serum Chemistries, Bone Marrow Cellularity, and Hepatic MicrosomalParameters. MUNSON, A. E., WHITE, K. L., JR., BARNES, D. W.,MUS-GROVE, D. L., LYSY, H. H., AND HOLSAPPLE, M. P. (1988).Fundam. Appl. Toxicol. 10, 691700. Adult female B6C3F1mice were gavaged with 4,4'-thiobis-(6-t-butyl-m-cresol) (TBBC)in corn oil at doses of 10, 100, or 200 mg/kg daily for 14 consecutivedays. There was no overt toxicity, as manifested by grosslyobservable behavioral changes, decreased growth rate over theexposure period, or mortality. There were also no marked effectson serum chemistries or hematology, with the exception of asignificant increase (41%) in the number of leukocytes at thehighest dose. Absolute differential counts indicated that significantincreases occurred in the number of lymphocytes (31%) and neutrophils(177%). Studies with bone marrow indicated a significant 30%increase in the number of cells/femur from animals treated withthe highest dose of TBBC. The number of macrophage progenitors(CFU-M)/femur was significantly increased by 28%, while thenumber of granulocyte-monocyte progenitors (CFU-GM)/femur wasnonsig-nificantly increased by 20% in the high dose animals.The weight of both the spleen and liver was increased in a dose-relatedfashion, although the histopathology of the spleen of TBBC-treatedmice was not different from control. The livers of mice receivingthe high dose showed mild focal hydropic degeneration, mildhepatitis, and a slight increase in the number of Kupffer cells.No other organs were affected. Liver microsomal protein andcytochrome P-450 levels were increased in a dose-related fashion.Enzyme activities of aminopyrine demethylase and aniline hydroxylase,but not arylhydrocarbon hydroxylase, were also increased ina dose-related fashion. 相似文献
10.
J. R. NEEFE JR. H. BALNER A. D. BARNES C. FORD G. N. ROOENTINE JR. W. VAN VREESWIJK F. E. WARD 《Tissue antigens》1975,6(2):77-79
The Second International Nonhuman Primate Histocompatibility Workshop permitted comparison of rhesus monkey alloantisera developd in various laboratories on a single common panel of related and unrelated monkeys. Analysis of the data permits the conclusion that at least nine specificities are recognized by more than one laboratory, including six at the first locus and three at the second locus. 相似文献