全文获取类型
收费全文 | 996篇 |
免费 | 44篇 |
国内免费 | 3篇 |
专业分类
耳鼻咽喉 | 6篇 |
儿科学 | 71篇 |
妇产科学 | 44篇 |
基础医学 | 139篇 |
口腔科学 | 2篇 |
临床医学 | 78篇 |
内科学 | 254篇 |
皮肤病学 | 25篇 |
神经病学 | 67篇 |
特种医学 | 20篇 |
外科学 | 95篇 |
综合类 | 13篇 |
预防医学 | 101篇 |
眼科学 | 4篇 |
药学 | 43篇 |
中国医学 | 1篇 |
肿瘤学 | 80篇 |
出版年
2023年 | 3篇 |
2021年 | 9篇 |
2020年 | 8篇 |
2019年 | 4篇 |
2018年 | 11篇 |
2017年 | 15篇 |
2016年 | 20篇 |
2015年 | 32篇 |
2014年 | 35篇 |
2013年 | 26篇 |
2012年 | 66篇 |
2011年 | 67篇 |
2010年 | 32篇 |
2009年 | 31篇 |
2008年 | 48篇 |
2007年 | 44篇 |
2006年 | 82篇 |
2005年 | 75篇 |
2004年 | 58篇 |
2003年 | 56篇 |
2002年 | 66篇 |
2001年 | 38篇 |
2000年 | 24篇 |
1999年 | 20篇 |
1998年 | 14篇 |
1997年 | 6篇 |
1996年 | 9篇 |
1995年 | 4篇 |
1994年 | 4篇 |
1992年 | 10篇 |
1991年 | 4篇 |
1990年 | 8篇 |
1989年 | 3篇 |
1988年 | 7篇 |
1987年 | 12篇 |
1986年 | 14篇 |
1985年 | 9篇 |
1984年 | 7篇 |
1983年 | 8篇 |
1982年 | 5篇 |
1980年 | 3篇 |
1979年 | 3篇 |
1976年 | 4篇 |
1975年 | 4篇 |
1974年 | 3篇 |
1973年 | 4篇 |
1971年 | 3篇 |
1970年 | 4篇 |
1968年 | 4篇 |
1966年 | 2篇 |
排序方式: 共有1043条查询结果,搜索用时 0 毫秒
1.
2.
3.
4.
AP de Moraes† ÉÂG de Arruda† MAV Vitoriano† MO de Moraes Filho‡ FÂF Bezerra‡ E de Magalhães Holanda§ MEA de Moraes‡ 《Journal of the European Academy of Dermatology and Venereology》2007,21(5):596-601
BACKGROUND: Seborrhoeic dermatitis (SD) is a common dermatosis in human immunodeficiency virus (HIV)-positive patients, many of whom do not respond satisfactorily to conventional topical treatments such as corticosteroids and antifungals. OBJECTIVE: A pilot study to investigate the efficacy and tolerability of pimecrolimus cream 1% in HIV-positive patients with facial SD. METHODS: In a single-centre study, 21 HIV-infected patients with mild to severe SD were treated twice daily with pimecrolimus cream 1% for 14 days. Thereafter, treatment was discontinued and patients followed up for 5 weeks. Skin involvement at baseline and on days 7, 14, 21, 35 and 49 was assessed using a four-point clinical score and digital photography. MAIN OUTCOME MEASURES: Efficacy and safety of pimecrolimus cream 1% treatment and incidence of relapse in the follow-up phase. Results Marked improvement was seen in clinical parameters at day 7, with >or= 90% patients clear of symptoms at day 14. Relapse was observed at day 35 but signs were milder than at baseline. All patients responded to therapy, despite their immunological status. Pimecrolimus did not alter CD4(+) and CD8(+) T-cell counts or viral load during the treatment period. CONCLUSION: Pimecrolimus cream represents a new, effective therapeutic option for facial SD in HIV patients. 相似文献
5.
BACKGROUND: To accurately phenotype red cell from patients with a positive direct antiglobulin test (DAT), nonlytic elution procedures were assessed for their ability to dissociate IgG from antibody-coated red cells without altering red cell antigen expression. STUDY DESIGN AND METHODS: Antibodies coating red cells that were sensitized in vivo (warm-reactive autoantibodies: 8 patients) or in vitro (42 alloantibodies) were eluted by using glycine-HCl and EDTA (acid/ EDTA), heat (56 degrees C, 10 min), or chloroquine method. RESULTS: Acid/EDTA elution gave the best results, reducing DAT positivity to microscopic levels or rendering the DAT negative in 48 of 50 instances, whereas 4 samples remained resistant to heat elution and 24 to chloroquine. Standard DAT agglutination scores demonstrated that both acid/EDTA and heat elution were superior to the chloroquine method (p < 0.0001). With the gel low-ionic-strength saline indirect antiglobulin test, acid/ EDTA was superior to heat (p < 0.001). Overall, acid/ EDTA elution dissociated more antibodies than heat (p < 0.0001), especially for Kell system (K, k, Kpa, Kpb) alloantibodies. Common red cell antigens, other than Kell system antigens, were unaffected by acid/EDTA elution. In contrast, the expression of most blood group antigens was diminished after heat elution. However, it was possible to type red cell antigens by using gel low-ionic-strength saline indirect antiglobulin tests or tube agglutination methods. CONCLUSION: Although heat elution may be used on a limited basis, the acid/EDTA method appears to be the procedure of choice for typing red cell coated with warm-reactive IgG alloantibodies or autoantibodies. 相似文献
6.
G Hussein Rassool MSc BA RMN RCNT RNT FETC CertEd CertCouns CertSupervision & Consultation 《Journal of advanced nursing》1993,18(9):1401-1407
The widespread use and misuse of alcohol, drug and other psychoactive substances are major health and social concerns that affect the lives of many The social and health sequelae of psychoactive drugs and alcohol are preventable and manageable with minimal interventions Nurses and other health workers can effectively respond to substance misuse problems and their existing generic skills can be easily adapted in working with substance misusers This paper considers some of the issues such as the extent of the problem, attitudinal considerations, response to substance misusers and a brief outline of the role of the nurse The urgent need for education and training in substance misuse and addictive behaviour for nurse practitioners is also addressed 相似文献
7.
doublecortin is the major gene causing X-linked subcortical laminar heterotopia (SCLH) 总被引:12,自引:0,他引:12
des Portes V; Francis F; Pinard JM; Desguerre I; Moutard ML; Snoeck I; Meiners LC; Capron F; Cusmai R; Ricci S; Motte J; Echenne B; Ponsot G; Dulac O; Chelly J; Beldjord C 《Human molecular genetics》1998,7(7):1063-1070
Subcortical laminar heterotopia (SCLH), or 'double cortex', is a cortical
dysgenesis disorder associated with a defect in neuronal migration.
Clinical manifestations are epilepsy and mental retardation. This disorder,
which mainly affects females, can be inherited in a single pedigree with
lissencephaly, a more severe disease which affects the male individuals.
This clinical entity has been described as X- SCLH/LIS syndrome. Recently
we have demonstrated that the doublecortin gene, which is localized on the
X chromosome, is implicated in this disorder. We have now performed a
systematic mutation analysis of doublecortin in 11 unrelated females with
SCLH (one familial and 10 sporadic cases) and have identified mutations in
10/11 cases. The sequence differences include nonsense, splice site and
missense mutations and these were found throughout the gene. These results
provide strong evidence that loss of function of doublecortin is the major
cause of SCLH. The absence of phenotype-genotype correlations suggests that
X-inactivation patterns of neuronal precursor cells are likely to
contribute to the variable clinical severity of this disorder in females.
相似文献
8.
Chromosomal factors of infertility in candidate couples for ICSI: an equal risk of constitutional aberrations in women and men 总被引:8,自引:0,他引:8
Gekas J Thepot F Turleau C Siffroi JP Dadoune JP Briault S Rio M Bourouillou G Carré-Pigeon F Wasels R Benzacken B;Association des Cytogeneticiens de Langue Francaise 《Human reproduction (Oxford, England)》2001,16(1):82-90
To assess the frequency of chromosomal aberrations in French candidates for intracytoplasmic sperm injection (ICSI), and to explore the existence of a female chromosomal factor in some cases of couple infertility, a collaborative retrospective clinical and cytogenetic study was performed, launched by the Association des Cytogénéticiens de Langue Franciaise (ACLF). The karyotypes of 3208 patients [2196 men (68.4%), 1012 (31.6%) women] included in ICSI programmes over a 3-year period in France were collected. A total of 183 aberrant karyotypes was diagnosed, corresponding to an abnormality frequency of 6.1% (134/2196) for men and 4.84% (49/1012) for women. The following frequencies of abnormalities were observed respectively for men and women: 1.23% (n = 27) and 0.69% (n = 7) for reciprocal translocations, 0.82% (n = 18) and 0.69% (n = 7) for Robertsonian translocations, 0.13% (n = 3) and 0.69% (n = 7) for inversions, 3.32% (n = 73) and 2.77% (n = 28) for numerical sex chromosome aberrations, and 0.59% (n = 13) and 0% for other structural aberrations. Among the male patients of this latter group, 0.40% (n = 9) had a Y chromosome abnormality. Among the male patients with numerical sex chromosome abnormalities, 2.23% (n = 49) were 47,XXY, 0.32% (n = 7) were 47,XYY, and 0.77% (n = 17) had a mosaicism for numerical sex chromosome anomalies. All the female patients with sex chromosome abnormalities (2.77%, n = 28) had mosaicism for numerical sex chromosome anomalies. Even if these cases-the significance of which was sometimes questioned-were disregarded in the analysis, 2.08% (21/1012) of abnormal karyotypes remained in women. An overall increased frequency of chromosomal aberrations was found, and this confirmed that in some cases of poor reproductive outcome there may be a contribution of maternal chromosome aberrations. Indeed, the existence of a chromosome abnormality in the female partner was associated with the group of infertile men in which there was no apparent cause of infertility. 相似文献
9.
van der Mee-Marquet N Bizet C Quentin R;réseau des biologistes du relais régional d'hygiène hospitalière du Centre 《Pathologie-biologie》2003,51(8-9):449-453
The "Relais Régional d'Hygiène Hospitalière du Centre" (RHC) promotes the hospital infection prevention at a regional level in France, including 80 healthcare institutions. The accuracy of antimicrobial susceptibility data submitted by laboratories to surveillance is essential. Since 2001, RHC imposed an external quality control to validate the accuracy of the data submitted by the laboratories that are involved in survey programs. Most laboratories are able to detect homogenous methicillin resistance in S. aureus, and high-level vancomycin resistance in E. faecalis. Nevertheless, the ability of laboratories to detect organisms with emerging antimicrobial resistance patterns is not optimal for (i) detection of heterogeneous methicillin resistance, (ii) reduced susceptibility to teicoplanin in a non-multiresistant S. aureus and (iii) detection of resistance to extended-spectrum cephalosporins. Educational program to optimize the testing methods has been programmed and perennially of quality control testing prior to accepting data from laboratory participating in surveillance system is decided. 相似文献
10.
In 1982-83 we organized training schemes for various people involved in primary health care at local authority level. These schemes were part of the pattern of similar activity carried out with trained professional staff of the mother-and-child care and school health services. What was new was the participation of non-professional users (or their representatives) of health services, i.e. local politicians, representatives of associations, etc. The training sessions brought together 20-25 participants for two or three days and there were occasionally follow-up meetings of one or two days. The participants, divided into small groups of five or six, played an active part in the meetings, which were based on known information about the local authority area and the participants' own contributions. The initial task was the identification of health problems. For this to be a relevant exercise, the many political, cultural and personal factors which influence people's lives had to be considered. The fact is that the usual epidemiological data are inadequate if they are based solely on a review of symptoms and their distribution among the population as a whole. The procedure begins with the group concerned, and priority in selecting problems is decided with and within the group itself. The solutions that are required will thus be based on the experience and reasoning of the people themselves. A procedure of this type ought to show the factors which affect the community (working conditions, environment, habitat, cultural background, etc.) and which influence health. If we understand the structures of the community and the resources at its disposal, we can adapt our response accordingly. In assessing our experiment, we found that the training sessions produced a local awareness and a mutual recognition of the various participants, both professional and non-professional. Each person began to understand his limits since his role was constantly being reviewed. At the same time the requirements voiced by health care users became more apparent to the professionals with their preconceived ideas about people's needs and requirements. 相似文献