全文获取类型
收费全文 | 4928篇 |
免费 | 271篇 |
国内免费 | 24篇 |
专业分类
耳鼻咽喉 | 134篇 |
儿科学 | 144篇 |
妇产科学 | 83篇 |
基础医学 | 677篇 |
口腔科学 | 210篇 |
临床医学 | 456篇 |
内科学 | 1227篇 |
皮肤病学 | 120篇 |
神经病学 | 381篇 |
特种医学 | 125篇 |
外科学 | 534篇 |
综合类 | 19篇 |
一般理论 | 1篇 |
预防医学 | 207篇 |
眼科学 | 96篇 |
药学 | 367篇 |
中国医学 | 10篇 |
肿瘤学 | 432篇 |
出版年
2023年 | 36篇 |
2022年 | 52篇 |
2021年 | 95篇 |
2020年 | 62篇 |
2019年 | 81篇 |
2018年 | 84篇 |
2017年 | 78篇 |
2016年 | 70篇 |
2015年 | 90篇 |
2014年 | 101篇 |
2013年 | 147篇 |
2012年 | 251篇 |
2011年 | 229篇 |
2010年 | 152篇 |
2009年 | 121篇 |
2008年 | 236篇 |
2007年 | 227篇 |
2006年 | 211篇 |
2005年 | 233篇 |
2004年 | 243篇 |
2003年 | 226篇 |
2002年 | 231篇 |
2001年 | 164篇 |
2000年 | 169篇 |
1999年 | 161篇 |
1998年 | 50篇 |
1997年 | 49篇 |
1996年 | 47篇 |
1995年 | 37篇 |
1994年 | 35篇 |
1993年 | 33篇 |
1992年 | 102篇 |
1991年 | 76篇 |
1990年 | 88篇 |
1989年 | 106篇 |
1988年 | 92篇 |
1987年 | 103篇 |
1986年 | 92篇 |
1985年 | 73篇 |
1984年 | 59篇 |
1983年 | 45篇 |
1979年 | 50篇 |
1978年 | 26篇 |
1977年 | 26篇 |
1975年 | 20篇 |
1974年 | 29篇 |
1972年 | 20篇 |
1970年 | 19篇 |
1968年 | 19篇 |
1966年 | 25篇 |
排序方式: 共有5223条查询结果,搜索用时 31 毫秒
11.
12.
Y Koyama Y Chinen H Ogura S Shishido I Higa T Hatano M Hayakawa A Osawa M Igarashi 《Nihon Hinyōkika Gakkai zasshi. The japanese journal of urology》1990,81(8):1212-1216
Immunological studies were performed in 87 patients with chyluria referred to our clinic from January 1982 to December 1988. White blood cell count in 78 patients was 5210.3 +/- 1440.9/mm3. The fraction and the number of lymphocyte were 18.7 +/- 9.5% and 934.1 +/- 521.6/mm3, respectively: they were lower than normal limit. The percentages of T and B lymphocytes studied in 46 patients were 79.3% +/- 11.2% (normal range: 76-86) and 10.4 +/- 7.9% (normal range: 8-16), respectively: both lymphocytes tended to decrease in percentage. Lymphocyte blast formation stimulated with phytohemagglutinin (PHA) was carried out in 20 patients. The mean of the blast formation was 17410.0 +/- 10275.1 c.p.m. (normal range: 377700-62400), and much lower than normal value. Of 22 patients who had PPD skin test, only 9 (40.9%) were positive. These findings signified that cellular immunity was suppressed in patients with chyluria. On the other hand, the value of immunoglobulin was within normal range (IgG: 1325.3 +/- 475.6 mg/dl, IgA: 242.0 +/- 98.3 mg/dl, IgM 130.4 +/- 95.9 mg/dl). Study on the values of laboratory examinations showed statistically positive correlation between total lymphocyte population and T cell number, and between total lymphocyte population and lymphocyte blast formation. In patients with chyluria, serious sequelae have not been reported. However, care should be taken for possible opportunistic infection and, particularly, malignant tumors because suppression of cellular immunity may be one of the promoting factors of malignant tumors. 相似文献
13.
p70 lupus autoantigen binds the enhancer of the T-cell receptor beta-chain gene. 总被引:9,自引:2,他引:7
下载免费PDF全文
![点击此处可从《Proceedings of the National Academy of Sciences of the United States of America》网站下载免费的PDF全文](/ch/ext_images/free.gif)
H Messier T Fuller S Mangal H Brickner S Igarashi J Gaikwad R Fotedar A Fotedar 《Proceedings of the National Academy of Sciences of the United States of America》1993,90(7):2685-2689
The p70 (Ku) autoantigen has been described as a nonhistone nuclear protein recognized by antibodies from lupus patients. In our studies on the regulation of T-cell receptor (TCR) beta-chain gene expression we have identified the p70 lupus autoantigen as a DNA-binding protein that binds the enhancer of the TCR beta-chain gene. This enhancer is essential for expression of the TCR beta gene. The core TCR beta enhancer contains the E3 motif, which we show here is essential for enhancer activity. The protection of the E3 motif in T cells and the marked reduction in enhancer activity when the E3 motif is mutated underline its physiological importance in regulating beta enhancer activity. The p70 lupus autoantigen gene was identified by screening T-cell lambda gt11 libraries with an E3 probe. The gene encodes a protein which binds the E3 motif in a sequence-specific manner. The identification of a 70-kDa protein as a major E3-binding protein by UV crosslinking is consistent with the conclusion that the p70 lupus autoantigen binds the beta enhancer. Finally, we have shown that T-cell nuclear proteins which bind the E3 motif bear p70 (Ku) lupus autoantigenic determinants. Together these data suggest that the p70 autoantigen binds a critical motif in the beta enhancer and probably regulates TCR beta gene expression. 相似文献
14.
Reversible low-molecular-weight proteinuria in patients with distal renal tubular acidosis 总被引:2,自引:0,他引:2
Takashi Igarashi Hidehiko Kawato Shigehiko Kamoshita 《Pediatric nephrology (Berlin, Germany)》1990,4(6):593-596
Four patients with untreated renal tubular acidosis had a urinary excretion of low-molecular-weight (LMW) proteins which was restored to normal by alkali therapy. Hypokalaemic proximal tubular damage in untreated patients with distal renal tubular acidosis is believed to be the cause of LMW proteinuria. An examination of urinary excretion of LMW proteins is useful for determining hypokalaemic proximal tubular dysfunction, as well as the efficiency of alkali therapy. 相似文献
15.
16.
Repeated injections of 45 ng/kg of maitotoxin into the peritoneal cavities of male ICR mice resulted in marked atrophy of lymphoid tissues, a reduction of lymphocytes in the circulating blood, reduced immunoglobulin M in serum, and an increase of calcium content in the adrenal glands. A single injection of 200 ng/kg of maitotoxin induced a marked increase in total calcium content of the adrenal glands as well as in plasma cortisol concentration (about seven times control) within 1 hr. In contrast, mice pretreated with CoCl2, a calcium channel inhibitor, and/or adrenalectomized mice, showed no discernible changes in the lymphoid tissues after repeated injections of maitotoxin. It is thus suggested that maitotoxin first stimulates calcium influx in the adrenal glands, which then causes the release of cortisol into the blood. The excess amount of cortisol in serum produces acute involution of the thymus and other lymphoid tissues. 相似文献
17.
18.
We examined the absorptive capacity and the nutritional condition of 14 infants with short bowel syndrome, whose residual small intestine was 90 cm or less. Their age ranged from 1 year to 18 years. Examined items were body weight, height, serum albumin, total cholesterol, triglyceride, fat soluble vitamins, trace elements and rapid turn over protein as markers of the nutritional condition. Fecal fat, fecal bile acid, d-xylose absorption test, sugar-, amino acid-evoked potential difference in the small intestine and disaccharidase activity of the mucosa were examined as markers of the absorptive capacity. Our results showed that the body weight was below the normal range in the patients with small intestine of less than 50 cm. Most nutritional markers were within normal range, however, cholesterol and vitamin D were low in the patients with fat malabsorption, especially in patients with less than 50 cm of small intestine. Fecal bile acid was higher than the normal range in all the patients. Potential difference was in normal range or slightly lower than normal in all the patients. We concluded that infants with less than 50 cm of small intestine had malabsorption of sugar, protein and fat. Therefore, prolonged nutrient support, especially fat, is necessary. 相似文献
19.
Maroun Dick M.D. Tulio E. Bertorini M.D. Masanori Igarashi M.D. 《Developmental medicine and child neurology》1992,34(3):262-265
Respiratory failure is an unusual initial manifestation of congenital muscular dystrophy. The authors describe a case of congenital muscular dystrophy in a patient presenting with rhabdomyolysis at birth. Despite an initially poor prognosis, aggressive respiratory therapy during the neonatal period permitted normal subsequent development. The muscular dystrophy predominantly involved the respiratory muscles. 相似文献
20.