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   2357篇
  免费   207篇
  国内免费   10篇
耳鼻咽喉   28篇
儿科学   48篇
妇产科学   40篇
基础医学   338篇
口腔科学   57篇
临床医学   287篇
内科学   377篇
皮肤病学   32篇
神经病学   291篇
特种医学   53篇
外科学   362篇
综合类   38篇
一般理论   12篇
预防医学   229篇
眼科学   100篇
药学   163篇
中国医学   1篇
肿瘤学   118篇
  2023年   18篇
  2022年   36篇
  2021年   70篇
  2020年   46篇
  2019年   51篇
  2018年   73篇
  2017年   33篇
  2016年   49篇
  2015年   51篇
  2014年   71篇
  2013年   84篇
  2012年   138篇
  2011年   130篇
  2010年   76篇
  2009年   61篇
  2008年   113篇
  2007年   153篇
  2006年   123篇
  2005年   117篇
  2004年   117篇
  2003年   87篇
  2002年   110篇
  2001年   49篇
  2000年   57篇
  1999年   44篇
  1998年   20篇
  1997年   14篇
  1996年   20篇
  1993年   15篇
  1992年   36篇
  1991年   34篇
  1990年   27篇
  1989年   33篇
  1988年   26篇
  1987年   30篇
  1986年   32篇
  1985年   26篇
  1984年   30篇
  1983年   17篇
  1982年   16篇
  1979年   25篇
  1978年   14篇
  1977年   15篇
  1975年   12篇
  1974年   24篇
  1973年   16篇
  1972年   11篇
  1971年   11篇
  1970年   18篇
  1968年   12篇
排序方式: 共有2574条查询结果,搜索用时 296 毫秒
91.
Background: Adverse childhood experiences are significant risk factors for physical and mental illnesses in adulthood. Traumatic brain injury/concussion is a challenging condition where pre-injury factors may affect recovery. The association between childhood adversity and traumatic brain injury/concussion has not been previously reviewed. The research question addressed is: What is known from the existing literature about the association between adverse childhood experiences and traumatic brain injury/concussion in adults?

Methods: All original studies of any type published in English since 2007 on adverse childhood experiences and traumatic brain injury/concussion outcomes were included. The literature search was conducted in multiple electronic databases. Arksey and O’Malley and Levac et al.’s scoping review frameworks were used. Two reviewers independently completed screening and data abstraction.

Results: The review yielded six observational studies. Included studies were limited to incarcerated or homeless samples, and individuals at high-risk of or with mental illnesses. Across studies, methods for childhood adversity and traumatic brain injury/concussion assessment were heterogeneous.

Discussion: A positive association between adverse childhood experiences and traumatic brain injury occurrence was identified. The review highlights the importance of screening and treatment of adverse childhood experiences. Future research should extend to the general population and implications on injury recovery.
  • Implications for rehabilitation
  • Exposure to adverse childhood experiences is associated with increased risk of traumatic brain injury.

  • Specific types of adverse childhood experiences associated with risk of traumatic brain injury include childhood physical abuse, psychological abuse, household member incarceration, and household member drug abuse.

  • Clinicians and researchers should inquire about adverse childhood experiences in all people with traumatic brain injury as pre-injury health conditions can affect recovery.

  相似文献   
92.
The trajectories and stability of self‐reported sleep duration recorded at ages 13, 15, and 23 years on reported sleep duration at age 30 years among 1105 students (55% male) who participated in the Norwegian Longitudinal Health and Behaviour Study were examined. Questionnaire data were used to obtain demographic and sleep variables. Dichotomised short sleep duration was based on normative values and set as ≤8.5 h (age 13 years), ≤8 h (age 15 years) and ≤7 h (ages 23 and 30 years). Results indicated a significant overall reduction in total sleep duration (h per night) across age groups. Sleep duration (continuous) at age 15 and 23 years (whole group) was moderately but positively correlated with sleep duration at age 30 years (P < 0.01). When split by sex, at age 15 years, this association was present among females only (P < 0.01); however, at age 23 years, this association was present in both male and females (both P < 0.001). Categorical short sleep at age 23 years (whole group) was associated with short sleep at age 30 years (unadjusted odds ratio = 3.67, 95% confidence interval 2.36–5.69). Following sex stratification, this effect was significant for both males (unadjusted odds ratio = 3.77, 95% confidence interval: 2.22–6.42) and females (unadjusted odds ratio = 2.71, 95% confidence interval: 1.46–5.04). No associations were noted for categorical short sleep at ages 13 or 15 years, and subsequent short sleep at 30 years. Habitual short sleep duration during middle adulthood is not sustained from the time of early adolescence. Rather, these trends appear to be formed during early adulthood.  相似文献   
93.
An analysis was undertaken of higher degrees by research awarded to optometrists based in the Hospital Eye Service since 1968. When these were considered in conjunction with current registration for higher degrees, it was possible to analyse research areas.
The most popular topics were glaucoma, detection and measurement of progression (5); cornea (4); ocular biometry (3); infant vision and development (3); keratoconus (3); and contact lenses (3).
In recent years, the scope of research has increased considerably and now embraces epidemiology, health economics and interdisciplinary decision making with other healthcare professionals.
Successful completion rates for British College of Optometrist's Scholars for higher degrees for the hospital and university sectors were analysed. The total completion rate was 16/26 (65.4%), university based: 11/20 (55%), and hospital based: 6/6 (100%).  相似文献   
94.
Abstract

Purpose: Evaluating the long-term impact of faculty development programs (FDPs) can help monitor the effectiveness of the program and identify areas for development. This study examined long-term differences in confidence, knowledge, behaviors, and policies of faculty members who attended FDPs on multiple choice question (MCQ) item analysis and faculty members who did not attend the FDPs.

Methods: A cross-sectional study design was used, by administering a 24-item survey to a representative sample (simple random selection) of 61 faculty members at King Abdulaziz University Faculty of Medicine.

Results: Among respondents, 34% did not attend FDPs; 53% attended 1–3 FDPs; and 13% attended more than 3 FDPs on MCQ item analysis. Results showed that faculty knowledge on elements of MCQ item analysis was significantly greater (p?=?.01) for members who attended the FDPs. Faculty who attended FDPs on MCQ item analysis were twice more likely to conduct item analysis in general (p?=?.020) and four times more likely to conduct item analysis for more than 70% of module examinations (p?=?.005).

Conclusion: FDPs focused on MCQ item analysis can yield systematic changes on faculty confidence, knowledge, and behaviors. Moreover, FDPs also need support from the department and need sustained strategic support to ensure continued effectiveness.  相似文献   
95.
This study was designed to evaluate the effects of cenobamate, an antiseizure medication for focal seizures, on the pharmacokinetics of cytochrome P450 probes (bupropion, CYP2B6; midazolam, CYP3A4/5; warfarin, CYP2C9; and omeprazole, CYP2C19) in healthy subjects. Probes were administered alone on days 1 (bupropion) and 7 (midazolam/warfarin/omeprazole), and with cenobamate 100 mg/day on day 69 (midazolam) and cenobamate 200 mg/day on days 99 (bupropion) and 105 (midazolam/warfarin/omeprazole). No significant interaction was concluded if 90% confidence intervals (CIs) for geometric mean ratios (GMRs) for area under the curve (AUC) and maximum concentration of CYP substrates and/or their metabolites were within the no‐effect interval (0.80–1.25). When co‐administered with cenobamate 100 mg/day, AUC from time of administration up to the time of the last quantifiable concentration (AUC0–last) GMR (90% CIs) for midazolam was 0.734 (0.647–0.832). When co‐administered with cenobamate 200 mg/day, AUC0–last GMRs (90% CI) for midazolam, bupropion, S‐warfarin, and omeprazole were 0.277 (0.238–0.323), 0.615 (0.522–0.724), 1.14 (1.10–1.18), and 2.07 (1.44–2.98), respectively. Co‐administration of cenobamate with midazolam and bupropion probes led to values that were outside and below the no effect boundary, indicating that cenobamate induces the CYP3A4/5 and CYP2B6 enzymes. Co‐administration of cenobamate led to omeprazole values which were outside and above the no‐effect boundary, but with high variability, suggesting that cenobamate may moderately inhibit CYP2C19 activity. No effect on CYP2C9 was observed with the cenobamate and warfarin combination. Co‐administration of cenobamate with these probes drugs was well‐tolerated. In this study, 200 mg/day cenobamate moderately induced CYP3A4/5 (dose‐dependently; 100 mg/day was a weak inducer), was a weak inducer of CYP2B6, moderately inhibited CYP2C19, and had a negligible effect on CYP2C9.

Study Highlights
  • WHAT IS THE CURRENT KNOWLEDGE ON THE TOPIC?
Drug‐drug interactions are a challenging aspect of managing epilepsy because many antiseizure medications (ASMs) induce or inhibit CYP450 enzymes, which are commonly involved in drug metabolism of many ASMs. Previous studies suggest that cenobamate, a US Food and Drug Administration (FDA)‐approved ASM for the treatment of adults with focal seizures, may affect the activity of certain CYP450 enzymes.
  • WHAT QUESTION DID THIS STUDY ADDRESS?
This study was designed to determine the effects of cenobamate on the pharmacokinetics of drugs known to affect the activity of these CYP450 enzymes, known as probe drugs. These probe drugs include bupropion, (CYP2B6), midazolam (CYP3A4/5), warfarin (CYP2C9), and omeprazole (CYP2C19).
  • WHAT DOES THIS STUDY ADD TO OUR KNOWLEDGE?
The results of this study indicate that cenobamate induces CYP2B6 activity, exhibits a dose‐dependent induction of CYP3A4/5 activity, inhibits CYP2C19 activity, and has a negligible effect on CYP2C9 activity.
  • HOW MIGHT THIS CHANGE CLINICAL PHARMACOLOGY OR TRANSLATIONAL SCIENCE?
These findings suggest that dose adjustments may be required when agents metabolized through these CYP450 pathways are used in conjunction with cenobamate.  相似文献   
96.
We estimate the prevalence and type of urinary incontinence (UI), possible associated risk factors, and the impact of UI on women's social and psychological well-being. The sample consisted of women attending a family medicine clinic at Jordan University Hospital (JUH) who answered a self-administered questionnaire. More than one-third of the sample reported the presence of UI. Stress type was the most frequently reported risk factor, followed by mixed incontinence, then urge. Age, diabetes, chronic cough, parity, and hysterectomy were positively associated with the presence of UI. Incontinence caused low self-esteem in more than half of the women who experienced it.  相似文献   
97.
98.
Context: Uncaria tomentosa D.C. (Rubiaceae) has several biological activities, including activity against resistant Candida strains. The synergistic interaction with terbinafine or fluconazole can be an important alternative to overcome this resistance.

Objectives: The potential synergy between a water insoluble fraction (WIF) from Uncaria tomentosa bark and the antifungals terbinafine (TRB) and fluconazole (FLZ) against non-Candida albicans resistant strains was investigated.

Materials and methods: TRB and FLZ, alone and combined with WIF, were tested by the checkerboard procedure using the micro-dilution technique against seven isolates of Candida glabrata and C. krusei. The molecular interactions occurring outside the cell wall were evaluated by scanning electron microscopy, Fourier transform infrared (FT-IR) and differential scanning calorimetry (DSC) analysis.

Results: The checkerboard inhibitory assay demonstrated synergy for WIF:TRB and WIF:FLZ combinations, respectively. The best synergistic cell damage was demonstrated unequivocally for the associations of WIF and TRB (1.95:4.0?μg/mL) and WIF and FLZ (1.95:8.0?μg/mL). The comparison of the FT-IR spectra of the antifungal alone, and in combination with WIF, allows recognizing clear differences in 3000, 1600, 1400, and 700–800?cm?1 bands. Additionally, modifications on TRB and FLZ thermograms were clearly noticed after their combination with WIF.

Conclusions: DSC and infrared analysis demonstrated intermolecular interactions between WIF and either TRB or FLZ. Hence, quite likely the synergistic effect is related to interaction events occurring outside the cell wall between antifungal and cat’s claw proanthocyanidins. A direct action on the cell wall is suggested, without connection with the ABC efflux pump mechanism.  相似文献   
99.
100.
PURPOSE: To describe the considerations leading to marketing approval of ixabepilone in combination with capecitabine and as monotherapy for the treatment of advanced breast cancer that is refractory to other chemotherapies. EXPERIMENTAL DESIGN: Data from one randomized multicenter trial comparing combination therapy with ixabepilone and capecitabine to capecitabine alone were analyzed for support of the combination therapy indication. For monotherapy, a single-arm trial of ixabepilone was analyzed. Supporting data came from an additional single-arm combination therapy study and two single-arm monotherapy studies. RESULTS: In patients with metastatic or locally advanced breast cancer who had disease progression on or following an anthracycline and a taxane, ixabepilone plus capecitabine showed an improvement in progression-free survival compared with capecitabine alone {median progression-free survival, 5.7 [95% confidence interval (95% CI), 4.8-6.7] versus 4.1 (95% CI, 3.1-4.3) months, stratified log-rank P < 0.0001; hazard ratio, 0.69 (95% CI, 0.58-0.83)}. As monotherapy for patients who had disease progression on or following an anthracycline, a taxane, and capecitabine, ixabepilone as monotherapy showed a 12% objective response rate by independent blinded review and 18% by investigator assessment. The major toxicities from ixabepilone therapy were peripheral neuropathy and myelosuppression, particularly neutropenia. CONCLUSIONS: On October 16, 2007, the Food and Drug Administration approved ixabepilone for injection in combination with capecitabine or as monotherapy for the treatment of patients with advanced breast cancer who have experienced disease progression on previous chemotherapies.  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