全文获取类型
收费全文 | 1399篇 |
免费 | 110篇 |
国内免费 | 2篇 |
专业分类
耳鼻咽喉 | 22篇 |
儿科学 | 86篇 |
妇产科学 | 67篇 |
基础医学 | 142篇 |
口腔科学 | 27篇 |
临床医学 | 155篇 |
内科学 | 247篇 |
皮肤病学 | 16篇 |
神经病学 | 107篇 |
特种医学 | 109篇 |
外科学 | 138篇 |
综合类 | 138篇 |
预防医学 | 86篇 |
眼科学 | 6篇 |
药学 | 108篇 |
肿瘤学 | 57篇 |
出版年
2023年 | 9篇 |
2021年 | 34篇 |
2020年 | 20篇 |
2019年 | 23篇 |
2018年 | 18篇 |
2017年 | 18篇 |
2016年 | 14篇 |
2015年 | 16篇 |
2014年 | 19篇 |
2013年 | 24篇 |
2012年 | 42篇 |
2011年 | 57篇 |
2010年 | 41篇 |
2009年 | 40篇 |
2008年 | 59篇 |
2007年 | 56篇 |
2006年 | 58篇 |
2005年 | 44篇 |
2004年 | 50篇 |
2003年 | 37篇 |
2002年 | 38篇 |
2001年 | 30篇 |
2000年 | 34篇 |
1999年 | 30篇 |
1998年 | 42篇 |
1997年 | 38篇 |
1996年 | 36篇 |
1995年 | 22篇 |
1994年 | 39篇 |
1993年 | 18篇 |
1992年 | 30篇 |
1991年 | 29篇 |
1990年 | 28篇 |
1989年 | 42篇 |
1988年 | 40篇 |
1987年 | 39篇 |
1986年 | 44篇 |
1985年 | 47篇 |
1984年 | 27篇 |
1983年 | 16篇 |
1982年 | 12篇 |
1981年 | 10篇 |
1980年 | 15篇 |
1979年 | 9篇 |
1977年 | 8篇 |
1976年 | 11篇 |
1975年 | 9篇 |
1973年 | 9篇 |
1969年 | 7篇 |
1967年 | 9篇 |
排序方式: 共有1511条查询结果,搜索用时 31 毫秒
1.
2.
3.
4.
Evaluation and assessment of new disposable strip for determination of plasma potassium concentration. 下载免费PDF全文
I Gibb 《Journal of clinical pathology》1987,40(3):298-301
Overall laboratory reproducibility for the Ames Seralyzer and plasma potassium test strips was less than 4% within the plasma reference range; and linearity extended from 2.1 to 10.2 mmol/l. Neither bilirubin nor lipaemia interfered in the analysis and selectivity for potassium over sodium was 450:1. Laboratory comparison with automated flame photometry and an indirect ion selective electrode showed a Seralyzer bias of +0.10 (+/- 25D 0.26) and +0.11 (0.27) mmol/l. Against flame photometry, comparison of analyses by six doctors from a coronary care unit and four nurses from a renal dialysis unit showed smaller positive biases (0.06 and 0.02 mmol/l) but substantially larger error ranges (0.43 and 0.55 mmol/l, respectively). Some 49% of the nurses' and 37% of the doctors' results differed from laboratory values by more than 0.2 mmol/l. Potassium test strip results proved acceptably comparable and reproducible when produced by an experienced analyst, but greater variability in clinical hands rendered the system unsuitable for precise monitoring of potassium concentration. 相似文献
5.
J Shield C Melville V Novelli G Anderson I Scheimberg D Gibb P Milla 《Archives of disease in childhood》1993,69(4):451-453
Lactobin-R is a commercial hyperimmune bovine colostrum with potent anticryptosporidial activity. It was administered to a 4 year old child with AIDS and severe diarrhoea associated with cryptosporidiosis. There was significant clinical improvement in the diarrhoea and permanent elimination of the parasite from the gut as assessed through serial jejunal biopsy and stool specimens. 相似文献
6.
D T Harryman J A Sidles J M Clark K J McQuade T D Gibb F A Matsen 《The Journal of bone and joint surgery. American volume》1990,72(9):1334-1343
We have demonstrated that certain passive motions of the glenohumeral joint are reproducibly accompanied by translation of the head of the humerus on the glenoid. We investigated the relationship of these translations to the position of the glenohumeral joint and to applied torques and forces in seven isolated glenohumeral joints from fresh cadavera, using a six-degrees-of-freedom position sensor and a six-axis force and torque transducer. Reproducible and significant translation occurred in an anterior direction with glenohumeral flexion and in a posterior direction with extension. We also observed translation with cross-body movement. The translation occurring with flexion was obligate in that it could not be prevented by the application of an oppositely directed force of thirty to forty newtons. Operative tightening of the posterior portion of the capsule increased the anterior translation on flexion and cross-body movement and caused it to occur earlier in the arc of motion compared with the intact glenohumeral joint. Operative tightening of the posterior part of the capsule also resulted in significant superior translation with flexion of the glenohumeral joint. 相似文献
7.
HERMAN TOURNAYE RONNY JANSSENS PAUL DEVROEY RK VAN STEIRTEGHEM 《International journal of andrology》1994,17(1):1-8
In order to evaluate the effects of pentoxifylline on sperm motility and longevity, a controlled in-vitro study was conducted on normozoospermic donor semen samples using the Cellsoft automated system for sperm motility analysis. After incubation and selection, pentoxifylline was found to improve the recovery of spermatozoa and to increase their velocity. In the subgroup of progressively motile spermatozoa, curvilinear velocity was also enhanced. It is concluded that pentoxifylline has an effect on the vigour, but not on the pattern, of sperm motion. Pentoxifylline did not improve the motility characteristics of senescent spermatozoa in normozoospermic sperm samples. Sperm survival, as shown by supra-vital staining, and motility longevity both decreased with time after pentoxifylline treatment. 相似文献
8.
B S Gendeh H Said A G Gibb N S Aziz Z M Zahir 《The Journal of laryngology and otology》1991,105(12):999-1001
In a prospective study on 47 patients, 16 mg of gentamicin per two litres dialysate was administered intraperitoneally at every cycle of intermittent peritoneal dialysis, carried out over the course of several days. Serum gentamicin sampling, pure tone audiometry and caloric tests were performed before and during the treatment. The gentamicin levels reached at the end of the thirtieth cycle were observed to be low. In view of this, the risk of acute ototoxicity was considered to be minimal. This was confirmed by the absence of clinical audiometric or vestibulometric evidence of toxicity. 相似文献
9.
V. JNSSON H. D. SCHRDER W. TROJABORG T. STAEHELIN JENSEN E. HIPPE M. MRK HANSEN 《Journal of internal medicine》1992,232(2):185-191
A study of 17 patients with autoimmune axonal or demyelinating peripheral neuropathy in combination with M-component is described. The M-component was associated with MGUS (monoclonal gammopathy of undetermined significance) in 12 patients, CLL in one patient, WaldenstrÖm's disease in one patient, and myeloma in three patients. Immunohistological examination with direct and indirect fluorescence showed binding of antibodies to nerve structures of the same class and light chain as seen in the M-component. In five cases of IgM M-component, the demyelinating neuropathy was caused by binding of the IgM M-protein and complement C3b to myelin-associated glycoproteins (MAG). In 12 cases with axonal neuropathy, binding of IgG to the connective tissue of the peri- and endoneurium was found in 50% of cases, IgM in five cases, and IgD in one case. None of the patients had central nervous system (CNS) symptoms. The clinical and therapeutic difficulties are discussed; only two patients with an acute course responded to immunosuppression. A marked co-expression of other autoimmune phenomena is interpreted in the light of cross-reactions between the autoantibody and similar tissue autoantigens. 相似文献
10.
T Shimizu D K Dudley P Borodchack J Belcher S L Perkins W Gibb 《Gynecologic and obstetric investigation》1992,34(3):142-145
Fibronectin production from amnion and placental tissues was evaluated in pregnant woman smokers and nonsmokers in order to examine if there were alterations of fibronectin metabolism in intrauterine tissues. In both amnion and placental tissues, cycloheximide inhibited the fibronectin output indicating that it was being synthesized. Mean fibronectin output by amnion in pregnant woman smokers was significantly lower than that in pregnant woman nonsmokers. In contrast, in the placenta from pregnant woman smokers, the output was significantly higher than that in pregnant woman nonsmokers. The present observations indicate that smoking alters an important biochemical constituent in amnion and placenta, possible leading to some complications. 相似文献