首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1000篇
  免费   84篇
  国内免费   1篇
耳鼻咽喉   13篇
儿科学   81篇
妇产科学   23篇
基础医学   155篇
口腔科学   27篇
临床医学   113篇
内科学   156篇
皮肤病学   7篇
神经病学   130篇
特种医学   30篇
外科学   74篇
综合类   1篇
预防医学   112篇
眼科学   10篇
药学   69篇
中国医学   1篇
肿瘤学   83篇
  2024年   3篇
  2023年   10篇
  2022年   18篇
  2021年   24篇
  2020年   20篇
  2019年   23篇
  2018年   43篇
  2017年   23篇
  2016年   30篇
  2015年   34篇
  2014年   42篇
  2013年   63篇
  2012年   71篇
  2011年   85篇
  2010年   41篇
  2009年   34篇
  2008年   79篇
  2007年   65篇
  2006年   67篇
  2005年   68篇
  2004年   62篇
  2003年   52篇
  2002年   54篇
  2001年   11篇
  2000年   6篇
  1999年   5篇
  1998年   6篇
  1997年   6篇
  1996年   4篇
  1995年   9篇
  1994年   3篇
  1993年   2篇
  1992年   4篇
  1991年   2篇
  1988年   1篇
  1986年   1篇
  1985年   2篇
  1984年   2篇
  1983年   1篇
  1981年   1篇
  1980年   1篇
  1979年   5篇
  1978年   1篇
  1970年   1篇
排序方式: 共有1085条查询结果,搜索用时 15 毫秒
941.
Abstract

Backround: Little is known about treatment and rehabilitation received and planned among young adults with work disability due to a mental disorder.

Aims: To examine the implemented psychotherapeutic and vocational interventions and treatment plans among young adults with work disability due to a mental disorder.

Material and methods: Data were collected from medical records of young Finnish adults aged 18–34 with a long-term work disability history due to a mental disorder (N?=?1163). The participant characteristics associated with four types of interventions were analyzed using log-binomial regression analysis.

Results: In total, 34% had participated in a psychotherapeutic intervention. Of the non-students, 26% had participated in vocational intervention. For 46% of the non-students, neither type of intervention was planned. Both implemented and planned psychotherapeutic interventions were associated with female sex, high education, attachment to employment, and absence of substance abuse. Low education and childhood adversity were associated with implemented vocational interventions and absence of substance abuse with planned vocational interventions.

Conclusion and significance: There is an unmet need for psychotherapeutic interventions among men, among those with lower socio-economic status, and among those with poor attachment to labor market. In addition, there is a lack of vocational interventions for those with high education. People with substance abuse are largely excluded from both types of interventions.  相似文献   
942.
Integration – and its synonym inclusion – is emphasised in the western welfare states and in the European Union in particular. Integration is also a central topic in the social sciences and in current mental health and homelessness research and practice. As mental healthcare has shifted from psychiatric hospitals to the community, it has inevitably become involved with housing and integration issues. This article explores how community integration is understood and tackled in mental health floating support services (FSSs) and, more precisely, in service user–practitioner home visit interaction. The aim, through shedding light on how the idea of integration is present and discussed in front‐line mental health practices, is to offer a ‘template’ on how we might, in a systematic and reflective way, develop community integration research and practice. The analysis is based on ethnomethodological and micro‐sociological interaction research. The research settings are two FSSs located in a large Finnish city. The data contain 24 audio‐recorded and transcribed home visits conducted in 2011 and 2012 with 16 different service users. The study shows how the participants in service user–practitioner interaction give meaning to community integration and make decisions about how it should (or should not) be enhanced in each individual case. This activity is called community integration work in action. Community integration work in action is based on various dimensions of integration: getting out of the house, participating in group activities and getting along with those involved in one's life and working life. Additionally, the analysis demonstrates how community integration work is accomplished by discursive devices (resistance, positioning, excuses and justifications, delicacy and advice‐giving). The article concludes that community integration is about interaction: it is not only service users' individual challenge but also a social challenge, our challenge.  相似文献   
943.
Karetnikov A  Keränen M  Lehto K 《Virology》2006,354(1):178-191
The 3' non-translated regions (NTRs) of mRNAs of eukaryotes and their viruses often contain translational enhancers (TEs). Blackcurrant reversion nepovirus (BRV) has a genome composed of two uncapped polyadenylated RNAs with very long 3' NTRs, nucleotide sequences of which are very conserved between different BRV isolates. In this work, we studied a role of the RNA2 3' NTR in translation, using mutagenesis of the firefly luciferase reporter mRNA, in protoplasts of Nicotiana benthamiana. The RNA2 3' NTR was found to contain a cap-independent TE (3' CITE), which must base pair with the 5' NTR to facilitate translation. The BRV 3' CITE and poly(A) tail provided a major contribution to translational efficiency, with less input from other 3' NTR parts. The BRV 3' CITE does not share similarity in nucleotide sequence and secondary structure with other viruses and thus represents a new class of 3' CITE.  相似文献   
944.

Objective  

Damp and moldy indoor environments aggravate pre-existing asthma. Recent meta-analyses suggest that exposure to such environments may also induce new-onset asthma. We assessed the probability of molds being the cause of asthma in a patient series examined because of respiratory symptoms in relation to workplace dampness and molds.  相似文献   
945.
Heparan sulfate proteoglycans modulate many physiological systems, and genes responsible for proteoglycan assembly and disassembly may affect their interaction. We sought to determine whether polymorphisms of the glucuronic acid epimerase (GLCE) rs3865014 and sulfatase‐2 (SULF2) rs2281279, genes coding for enzymes participating in heparan sulfate side chain activity, associate with hypertension, selected cardiometabolic risk factors and cardiovascular events in the Tampere adult population cardiovascular risk study. A Finnish cohort of 339 subjects with diagnosed hypertension and 441 controls was analyzed. Samples were genotyped for GLCE rs3865014 (A>G) and SULF2 rs2281279 (T>C) polymorphisms using competitive allele‐specific PCR (KASP) technique. Prevalence of ischemic heart diseases (I20–I25) and incidence of cerebrovascular diseases (I60–I69) and transient cerebral ischemic attacks (TIA) (G45) were followed up until the subjects were on the average 60 years old. GLCE rs3865014 G allele showed negative association with hypertension (p = 0.022), waist circumference (p = 0.032), BMI (p = 0.048), and positive association with hemoglobin (p = 0.029), low‐density lipoprotein cholesterol (p = 0.031), and frequency of cerebrovascular events (p = 0.011). SULF2 rs2281279 showed no association with the studied parameters. The GLCE gene polymorphism rs3865014 appears to have biological relevance in human pathophysiology.  相似文献   
946.
Noroviruses are an important cause of epidemic acute gastroenteritis in humans. In this study the production and characterization of GII.4 norovirus virus-like particles (VLPs) in insect cells is reported. Furthermore, the expression of corresponding norovirus polyhistidine-tagged P domain protein in Escherichia coli is described. The protruding P domain of the norovirus capsid is known to contain determinants for antibody and receptor binding. Therefore, P domain proteins were studied as an alternative diagnostic tool for evaluating norovirus infection. Analyses by dynamic light scattering and cryo-electron microscopy revealed the presence of intact VLPs with an average diameter of about 40 nm. Immunostaining and ELISA assays using norovirus-specific human sera revealed that VLPs and the P domain are recognized by norovirus-specific antibodies and by their putative receptor. The VLPs and P domain protein are potentially useful in the development of diagnostic and vaccination tools for noroviruses.  相似文献   
947.
Interactions between cells and the extracellular matrix are at the core of tissue engineering and biology. However, most studies of these interactions have used traditional two-dimensional (2D) tissue culture, which is less physiological than three-dimensional (3D) tissue culture. In this study, we compared cell behavior in four types of commonly used extracellular matrix under 2D and 3D conditions. Specifically, we quantified parameters of cell adhesion and migration by human foreskin fibroblasts in cell-derived matrix or hydrogels of collagen type I, fibrin, or basement membrane extract (BME). Fibroblasts in 3D were more spindle shaped with fewer lateral protrusions and substantially reduced actin stress fibers than on 2D matrices; cells failed to spread in 3D BME. Cell-matrix adhesion structures were detected in all matrices. Although the shapes of these cell adhesions differed, the total area per cell occupied by cell-matrix adhesions in 2D and 3D was nearly identical. Fibroblasts migrated most rapidly in cell-derived 3D matrix and collagen and migrated minimally in BME, with highest migration directionality in cell-derived matrix. This identification of quantitative differences in cellular responses to different matrix composition and dimensionality should help guide the development of customized 3D tissue culture and matrix scaffolds for tissue engineering.  相似文献   
948.
Background and purpose Tibial fractures comprise 10% of all fractures in children. To our knowledge there have been no previous reports of treatment injuries in these fractures. We analyzed compensation claims concerning treatment of these fractures in Finland. We used this information to determine preventable causes of treatment injuries.Material and methods In Finland, the Patient Insurance Center (PIC) provides financial compensation for patients who have sustained an injury in connection with medical treatment or operation. We retrospectively analyzed all claims for compensation arising from treatment of tibial fractures in children that had been received by the PIC between 1997 and 2004. The mode of treatment, complications, and permanent sequelae were assessed. We also estimated the number of avoidable treatment injuries.Results and interpretation The PIC received 50 claims for compensation during the 8-year study period. The claims were based on the following issues: pain, incorrect diagnosis and treatment, permanent disability, extra treatment expenses, inappropriate behavior of the medical personnel, and loss of income of the parents. 35/50 claims had received compensation, of which 32 were related to the treatment and 3 to infections. The treatment injuries that had led to compensation comprised a delay in diagnosis and treatment in 15 patients, inappropriate casting in 9, inappropriate operative treatment in 5, and other causes in 3 patients. An unsatisfactory standard of treatment and missed diagnosis were the most common reasons for compensation. In restrospect, all but 1 of the 35 injuries that had led to compensation were considered to be avoidable.  相似文献   
949.
Patients with depression in partial remission are at high risk of relapse, but factors associated with being in this outcome group are not well known. We conducted a clinical survey to examine the course of major depression in 87 patients during a follow-up period of 6 years. Beck Depression Inventory (BDI) scores indicated the outcome of depression, i.e. remission, partial remission or fully symptomatic, at 6, 12 and 24 months and after 6 years. The prevalence of partial remission varied from 16% to 23% at different follow-ups. All symptom and functioning scale scores indicated at every assessment that the partial depression group managed better than those in the fully symptomatic group, but worse than those in remission. Partial remission was associated with a significant impairment in psychosocial functioning and a high level of symptoms throughout the follow-up. The partial remission group must be recognized and actively treated.  相似文献   
950.
Clinical characteristics and cytogenetic aberrations were ascertained and reviewed in a population‐based consecutive series of 285 pediatric T‐cell acute lymphoblastic leukemias (T‐ALLs) diagnosed between 1992 and 2006 in the Nordic countries. Informative karyotypic results were obtained in 249 (87%) cases, of which 119 (48%) were cytogenetically abnormal. Most (62%) of the aberrant T‐ALLs were pseudodiploid. Structural changes were more common than numerical ones; 86% displayed at least one structural abnormality and 41% at least one numerical anomaly. The most frequent abnormalities were T‐cell receptor (TCR) gene rearrangements (20%) [TCR;11p13 (10%), TCR;10q24 (3%), TCR;other (8%)], del(9p) (17%), +8 (14%), del(6q) (12%), and 11q23 rearrangements (6%). The TCR;other group comprised the rare rearrangements t(X;14)(p11;q11), t(X;7)(q22;q34), t(1;14)(p32;q11), ins(14;5)(q11;q?q?), inv(7)(p15q34), t(8;14)(q24;q11), t(7;11)(q34;p15), and t(12;14)(p13;q11). The clinical characteristics of this Nordic patient cohort agreed well with previous larger series, with a median age of 9.0 years, male predominance (male/female ratio 3.1), median white blood cell (WBC) count of 66.5 × 109/l, and a high incidence of mediastinal mass and central nervous system involvement (59% and 9.5%, respectively). These features did not differ significantly among the various genetic subgroups. 5‐year event‐free survival (EFS) and overall survival for all patients were 0.61 (±0.03) and 0.67 (±0.03), respectively. In a multivariate analysis, two factors affected negatively the EFS, namely a WBC count of ≥200 × 109/l (P < 0.001) and the presence of rare TCR rearrangements (P = 0.001). In conclusion, in this large series of childhood T‐ALLs from the Nordic countries, the cytogenetic findings were not associated with risk of therapy failure with the exception of the TCR;other group. However, further prospective and collaborative investigations of this genetically heterogeneous entity are needed to confirm these results. © 2009 Wiley‐Liss, Inc.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号