全文获取类型
收费全文 | 6470篇 |
免费 | 442篇 |
国内免费 | 31篇 |
专业分类
耳鼻咽喉 | 36篇 |
儿科学 | 234篇 |
妇产科学 | 147篇 |
基础医学 | 866篇 |
口腔科学 | 118篇 |
临床医学 | 596篇 |
内科学 | 1409篇 |
皮肤病学 | 114篇 |
神经病学 | 647篇 |
特种医学 | 137篇 |
外国民族医学 | 1篇 |
外科学 | 631篇 |
综合类 | 67篇 |
一般理论 | 4篇 |
预防医学 | 718篇 |
眼科学 | 81篇 |
药学 | 447篇 |
中国医学 | 20篇 |
肿瘤学 | 670篇 |
出版年
2024年 | 7篇 |
2023年 | 82篇 |
2022年 | 168篇 |
2021年 | 281篇 |
2020年 | 190篇 |
2019年 | 221篇 |
2018年 | 259篇 |
2017年 | 196篇 |
2016年 | 218篇 |
2015年 | 201篇 |
2014年 | 308篇 |
2013年 | 344篇 |
2012年 | 621篇 |
2011年 | 643篇 |
2010年 | 342篇 |
2009年 | 271篇 |
2008年 | 388篇 |
2007年 | 419篇 |
2006年 | 381篇 |
2005年 | 367篇 |
2004年 | 293篇 |
2003年 | 246篇 |
2002年 | 208篇 |
2001年 | 28篇 |
2000年 | 13篇 |
1999年 | 20篇 |
1998年 | 49篇 |
1997年 | 28篇 |
1996年 | 21篇 |
1995年 | 19篇 |
1994年 | 24篇 |
1993年 | 9篇 |
1992年 | 7篇 |
1991年 | 8篇 |
1990年 | 7篇 |
1989年 | 7篇 |
1988年 | 5篇 |
1987年 | 8篇 |
1986年 | 3篇 |
1985年 | 4篇 |
1984年 | 5篇 |
1983年 | 3篇 |
1982年 | 8篇 |
1980年 | 2篇 |
1979年 | 2篇 |
1978年 | 4篇 |
1977年 | 1篇 |
1975年 | 1篇 |
1974年 | 1篇 |
1969年 | 1篇 |
排序方式: 共有6943条查询结果,搜索用时 31 毫秒
61.
Nadia Prendergast Priscilla Boakye Annette Bailey Honour Igwenagu Tahja Burnett-Ffrench 《Nursing inquiry》2024,31(2):e12604
The call to address anti-Black racism in workplaces resonates across several organizations and institutions in Canada. But specifically, the coronavirus disease 2019 pandemic shed further light on how health inequities negatively impact the Black community. After conducting a literature review of the experiences of Black nurses in Canada, a deeper understanding of their plight was gained. In healthcare, the findings from the Black Nurses' Task Force report conclude that anti-Black racist practices are pervasive in nursing, and there remains a paucity of research in this area. This study builds off the report by exploring how Black nurses experience anti-Black racism while working in Canada's healthcare system. Inspired by critical race theory and Black feminist thought, an exploratory qualitative research study was conducted, using semistructured interviews to gather data. The study concludes that Black nurses experience anti-Black racism within the workplace, and it manifests itself through some of the attitudes of colleagues, patients, and nurses in leadership roles. Despite policies and statements that were in place to protect them, anti-Black racism continues to occur systematically. The findings point to the need for change in the overall workplace culture, which includes a fair representation of Black nurses in leadership roles, further research to identify best practices for tackling anti-Black racism within Canada's healthcare system, and mandatory training on anti-Black racism for healthcare leaders, educators, and service providers. 相似文献
62.
Tanja N. Fehm Manfred Welslau Volkmar Müller Diana Lüftner Florian Schütz Peter A. Fasching Wolfgang Janni Christoph Thomssen Isabell Witzel Milena Beierlein Erik Belleville Michael Untch Marc Thill Hans Tesch Nina Ditsch Michael P. Lux Bahriye Aktas Maggie Banys-Paluchowski Cornelia Kolberg-Liedtke Andreas D. Hartkopf Achim Wckel Hans-Christian Kolberg Nadia Harbeck Elmar Stickeler 《Geburtshilfe und Frauenheilkunde》2023,83(3):289
The treatment of patients with early stage breast cancer has changed in recent years due to the introduction of pembrolizumab, olaparib, and abemaciclib. These and other drugs with the same class of active ingredient are currently in trial for various indications. This review article summarizes the latest results that have either been presented at major conferences such as the ESMO 2022 or published recently in international journals. This includes reports on newly discovered breast cancer genes, atezolizumab in neoadjuvant therapy in HER2-positive patients, long-term data from the APHINITY study, and on how preoperative peritumoral application of local anesthetics can influence the prognosis. We also present solid data on dynamic Ki-67 from the ADAPT studies.Key words: breast cancer, surgery, chemotherapy, therapy standard 相似文献
63.
The objective of this study was to explore the effect of COVID-19 and Ramadan on physical activity (PA) and burnout in teachers and the relationship between them. A total of 57 secondary school teachers from public education centers participated in the present study. They were aged between 29 and 52 years. To determine the effect of Ramadan and COVID-19 on PA and burnout, participants completed the online questionnaires before COVID-19, one week before Ramadan and during the second week of Ramadan. The International Physical Activity Questionnaire-BREF and the Maslach Burnout Inventory-Human Services Survey were used to assess PA intensities and burnout, respectively. The data revealed that total PA (p < 0.001, p < 0.05, respectively) vigorous metabolic equivalent of task (MET) (p < 0.001, p < 0.05, respectively), moderate MET (p < 0.001, p < 0.01, respectively) were higher before COVID-19 and before Ramadan than during Ramadan. Regarding burnout subscales, emotional exhaustion (p < 0.001, p < 0.01, respectively) was higher before Ramadan than before COVID-19 and during Ramadan. A lower personal accomplishment was reported before Ramadan than before COVID-19 and during Ramadan (both p < 0.05). In addition, low to high correlations were observed between PA intensities and burnout subscales, except for the correlation between depersonalization and all PA intensities. In conclusion, Ramadan intermittent fasting along with PA was highly recommended for teachers and the general population to improve positive emotions and general health. 相似文献
64.
Annabelle M Wilson Anthea M Magarey Nadia Mastersson 《The international journal of behavioral nutrition and physical activity》2008,5(1):5
Background
Food behaviours, attitudes, environments and knowledge are relevant to professionals in childhood obesity prevention, as are dietary patterns which promote positive energy balance. There is a lack of valid and reliable tools to measure these parameters. The aim of this study was to determine the reliability and relative validity of a child nutrition questionnaire assessing all of these parameters, used in the evaluation of a community-based childhood obesity prevention project. 相似文献65.
PCR assay targeting virulence genes of Helicobacter pylori isolated from drinking water and clinical samples in Lahore metropolitan, Pakistan
下载免费PDF全文
![点击此处可从《Journal of water and health》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Helicobacter pylorus is considered for chronic gastritis, gastric ulcers and adenocarcinoma and its high infection rate is observed in overcrowded and lower socioeconomic groups in developing countries. This study was designed to identify the role of drinking water in the transmission and prevalence of H. pylori (HP). Selective HP medium was developed for enrichment and presumptive identification of H. pylori by urease, catalase and species specific 16S rRNA tests. The virulence genes (vacA s and m regions and cagA) of H. pylori in 90 out of 225 H. pylori positive drinking water samples were present (40%). Ten out of 18 biopsies (55.55%) and 15 out of 50 vomiting fluids of gastric disease patients (30%) were also positive for virulence genes. Anti-H. pylori antibodies were also detected in 31 out of 50 patients sera. The presence of virulence genes was also directly confirmed by hybridization studies using non-radioactive DNA probes of 16S rRNA, vacA and cagA genes. The presence of H. pylori in water is due to poor sanitary conditions, improper waste disposal and lack of public health education. PCR-based analysis and colony hybridization can be used for detection of H. pylori in clinical and environmental samples. 相似文献
66.
Piero Portincasa Giuseppe Celano Nadia Serale Paola Vitellio Francesco Maria Calabrese Alexandra Chira Liliana David Dan L. Dumitrascu Maria De Angelis 《Nutrients》2022,14(12)
Fructose intolerance (FI) is a widespread non-genetic condition in which the incomplete absorption of fructose leads to gastro-intestinal disorders. The crucial role of microbial dysbiosis on the onset of these intolerance symptoms together with their persistence under free fructose diets are driving the scientific community towards the use of probiotics as a novel therapeutic approach. In this study, we evaluated the prevalence of FI in a cohort composed of Romanian adults with Functional Grastrointestinal Disorders (FGIDs) and the effectiveness of treatment based on the probiotic formulation EQBIOTA® (Lactiplantibacillus plantarum CECT 7484 and 7485 and Pediococcus acidilactici CECT 7483). We evaluated the impact of a 30-day treatment both on FI subjects and healthy volunteers. The gastrointestinal symptoms and fecal volatile metabolome were evaluated. A statistically significant improvement of symptoms (i.e., bloating, and abdominal pain) was reported in FI patient after treatment. On the other hand, at the baseline, the content of volatile metabolites was heterogeneously distributed between the two study arms, whereas the treatment led differences to decrease. From our analysis, how some metabolomics compounds were correlated with the improvement and worsening of clinical symptoms clearly emerged. Preliminary observations suggested how the improvement of gastrointestinal symptoms could be induced by the increase of anti-inflammatory and protective substrates. A deeper investigation in a larger patient cohort subjected to a prolonged treatment would allow a more comprehensive evaluation of the probiotic treatment effects. 相似文献
67.
68.
69.
Clinical Rheumatology - Spondyloarthritis (SpA) has been less well studied than rheumatoid arthritis in North Africa, due to a belief that it is rare and benign in certain populations. The main... 相似文献
70.
Katie Magoon Claire Beamish Nadia Dowshen Aletha Akers 《Journal of pediatric and adolescent gynecology》2019,32(6):612-614
Study ObjectiveLong-acting reversible contraceptives (LARCs) are the most effective form of pregnancy prevention for sexually active adolescents, yet usage rates are low. The Affordable Care Act (ACA) mandated insurers cover LARCs without cost-sharing. Compliance with this policy is not well documented. This study assessed LARC coverage by insurers in a large pediatric health system.Design, Setting, Participants, and InterventionsBetween June and August 2016, LARC coverage was assessed through content reviews of insurance Web sites, formularies, and summaries of benefits for all Pennsylvania Medicaid plans and the top 20 commercial insurers for a large pediatric health system.Main Outcome MeasuresThe primary outcome was adherence to the ACA mandate for LARC coverage without cost-sharing.ResultsAmong the 37 plans (17 public, 20 private), 21 (56.8%) were adherent and 16 (43.2%) were nonadherent. Among nonadherent plans, 3 plans covered LARC services but required cost-sharing, whereas 13 did not cover LARC services at all. There was not a statistically significant difference in LARC coverage between public and private plans.ConclusionDespite the landmark ACA mandate, insurance coverage of LARCs in pediatric hospitals is low for young women among private and public insurers. Insurer failure to adhere to the ACA among pediatric patients represents a barrier to LARC access for those at high risk of unintended pregnancy. 相似文献