全文获取类型
收费全文 | 8332篇 |
免费 | 421篇 |
国内免费 | 55篇 |
专业分类
耳鼻咽喉 | 173篇 |
儿科学 | 145篇 |
妇产科学 | 127篇 |
基础医学 | 976篇 |
口腔科学 | 296篇 |
临床医学 | 489篇 |
内科学 | 2031篇 |
皮肤病学 | 207篇 |
神经病学 | 749篇 |
特种医学 | 220篇 |
外科学 | 1199篇 |
综合类 | 52篇 |
一般理论 | 1篇 |
预防医学 | 240篇 |
眼科学 | 157篇 |
药学 | 616篇 |
中国医学 | 18篇 |
肿瘤学 | 1112篇 |
出版年
2023年 | 45篇 |
2022年 | 86篇 |
2021年 | 148篇 |
2020年 | 80篇 |
2019年 | 103篇 |
2018年 | 179篇 |
2017年 | 121篇 |
2016年 | 154篇 |
2015年 | 155篇 |
2014年 | 192篇 |
2013年 | 242篇 |
2012年 | 376篇 |
2011年 | 390篇 |
2010年 | 241篇 |
2009年 | 175篇 |
2008年 | 355篇 |
2007年 | 430篇 |
2006年 | 445篇 |
2005年 | 461篇 |
2004年 | 418篇 |
2003年 | 395篇 |
2002年 | 361篇 |
2001年 | 304篇 |
2000年 | 262篇 |
1999年 | 242篇 |
1998年 | 126篇 |
1997年 | 78篇 |
1996年 | 76篇 |
1995年 | 79篇 |
1994年 | 70篇 |
1993年 | 65篇 |
1992年 | 185篇 |
1991年 | 153篇 |
1990年 | 179篇 |
1989年 | 146篇 |
1988年 | 141篇 |
1987年 | 158篇 |
1986年 | 121篇 |
1985年 | 139篇 |
1984年 | 97篇 |
1983年 | 77篇 |
1982年 | 37篇 |
1980年 | 37篇 |
1979年 | 63篇 |
1978年 | 39篇 |
1977年 | 35篇 |
1975年 | 32篇 |
1974年 | 39篇 |
1972年 | 33篇 |
1971年 | 30篇 |
排序方式: 共有8808条查询结果,搜索用时 15 毫秒
1.
H Ogura H Kubota I Nomura T Tomoda K Araki Y Ogura T Kurashige 《The Japanese journal of antibiotics》1989,42(2):401-410
A new macrolide antibiotic, clarithromycin (TE-031, A-56268), was studied for its clinical efficacy in the field of pediatrics. Patients treated were infants and children ranging from 2 months to 11 years old suffering from acute bronchitis in 5 cases, acute tonsillitis in 2 cases, Mycoplasma pneumonia in 2 cases, pertussis in 6 cases, scarlatina in 1 case and acute enteritis in 2 cases, a total of 18 cases. TE-031 was administered 19.7-43.5 mg/kg in daily doses and lengths of treatment ranged from 4 to 19 days. As regards to its clinical efficacy, good or excellent results were obtained in all cases: excellent in 11 cases and good in 7 cases. No clinical side effects nor abnormal laboratory test values obviously attributable to TE-031 were observed. 相似文献
2.
3.
4.
Tamikuni Komatsu Masayuki Nomura Youzou Kakudate Syuzou Fujiwara R. B. Heimann 《Macromolecular chemistry and physics.》1995,196(9):3031-3040
Dehydrochlorinated poly(vinylidene chloride) proved to be a conjugated polyene-polyene polymer. Shock compression of the polymer formed a large portion of graphite and trace amounts of diamond and of an unknown carbon. The unknown carbon belongs to the hexagonal crystal system and possesses the cell dimension α0 = 0.338 nm. A comparison with known carbynes was made in terms of the crystalline parameters. 相似文献
5.
6.
A Ueda K Aoyama T Ueda K Obama T Ueno S Hokama S Nomura 《British journal of industrial medicine》1992,49(7):499-506
The only workers presently exposed to bagasse dust in Japan are the employees of sugar refineries and lacquerware factories. A follow up study of six former cases of bagassosis from among the retired employees of a paper board factory, closed since 1973, showed that none of the subjects still had bagassosis. Examinations of 70 employees of a sugar refinery for allergic reactions also showed no case of bagassosis. Seven cases with suspicious shadows of bagassosis on chest radiographs and four cases with positive serum precipitin to stored bagasse were, however, found among those 70 subjects. The results show the disappearance of a past episode of bagassosis and the possibility of a new occurrence of bagassosis among the employees of sugar refineries and lacquerware factories in the near future in Japan. 相似文献
7.
A 41-year-old hemodialyzed woman developed ascites and was found to have secondary iron overload. The dose of administered iron was approximately 11-12 g, and her serum ferritin level was 15,000 ng/ml (15,000 micrograms/l). There were no signs of congestive heart failure, fluid overload, or liver cirrhosis. A program of weekly phlebotomy combined with recombinant human erythropoietin (rhEPO) therapy was tried to eliminate the iron congestion. After 9 months of this therapy, about 5 g of iron had been removed. The ascites completely disappeared, and her serum ferritin level fell to 5,800 ng/ml (5,800 micrograms/l). This suggests that such combined therapy would be useful when iron overload must be corrected rapidly. Before therapy, the sterile ascitic fluid showed exudative characteristics with 3.7 g/dl (37 g/l) of total protein. The serum-ascites albumin difference was 0.6 g/dl (6 g/l), and the fluid contained 1,400 inflammatory cells/mm3 (1.4 X 10(9)/l). Notably, the serum-ascites albumin difference increased in parallel with iron elimination. These findings suggested that iron deposition may have played a role in changing the permeability of the peritoneum, or in impairing lymphatic drainage, both of which are presumed to be pathogenetic factors of nephrogenic ascites. 相似文献
8.
9.
The association of replacement estrogens with breast cancer 总被引:4,自引:0,他引:4
A M Nomura L N Kolonel T Hirohata J Lee 《International journal of cancer. Journal international du cancer》1986,37(1):49-53
This epidemiologic case-control study examined the relationship between replacement estrogen use and breast cancer risk in 2 population groups in Hawaii. No significant associations were observed when 161 Caucasian cases were compared with either their neighborhood controls (RR = 0.9; 95% Cl = 0.5-1.3) or their hospital controls (RR = 0.7; 95% Cl = 0.4 to 1.1) and when 183 Japanese cases were compared with either their neighborhood controls (RR = 1.1; 95% Cl = 0.7-1.6) or their hospital controls (RR = 1.0; 95% Cl = 0.6-1.4). The results indicate that the use of replacement estrogens cannot account for the large difference in breast cancer incidence between the 2 Hawaiian ethnic groups. However, further data analysis involving neighborhood controls was suggestive of a possible increase in breast cancer risk with estrogen use for certain sub-groups of women who are at high risk for the disease. These included estrogen users with a family history of breast cancer or a history of benign breast disease. These findings are in agreement with other studies which have used non-hospitalized controls. Because the numbers of cases in this study are not substantial, it is recommended that a large population-based case-control study be undertaken to clarify the relationship between breast cancer risk and replacement estrogen use, especially in sub-groups of women at high risk for the disease. 相似文献
10.