全文获取类型
收费全文 | 637篇 |
免费 | 39篇 |
国内免费 | 2篇 |
专业分类
耳鼻咽喉 | 12篇 |
儿科学 | 19篇 |
妇产科学 | 3篇 |
基础医学 | 45篇 |
口腔科学 | 44篇 |
临床医学 | 59篇 |
内科学 | 80篇 |
皮肤病学 | 6篇 |
神经病学 | 27篇 |
特种医学 | 46篇 |
外科学 | 70篇 |
综合类 | 3篇 |
一般理论 | 1篇 |
预防医学 | 33篇 |
眼科学 | 5篇 |
药学 | 94篇 |
中国医学 | 4篇 |
肿瘤学 | 127篇 |
出版年
2023年 | 5篇 |
2022年 | 5篇 |
2021年 | 15篇 |
2020年 | 13篇 |
2019年 | 18篇 |
2018年 | 12篇 |
2017年 | 14篇 |
2016年 | 23篇 |
2015年 | 21篇 |
2014年 | 28篇 |
2013年 | 37篇 |
2012年 | 52篇 |
2011年 | 47篇 |
2010年 | 22篇 |
2009年 | 25篇 |
2008年 | 34篇 |
2007年 | 44篇 |
2006年 | 25篇 |
2005年 | 21篇 |
2004年 | 10篇 |
2003年 | 21篇 |
2002年 | 11篇 |
2001年 | 10篇 |
2000年 | 15篇 |
1999年 | 6篇 |
1998年 | 3篇 |
1997年 | 2篇 |
1996年 | 7篇 |
1995年 | 4篇 |
1993年 | 1篇 |
1992年 | 9篇 |
1991年 | 21篇 |
1990年 | 7篇 |
1989年 | 15篇 |
1988年 | 11篇 |
1987年 | 18篇 |
1986年 | 10篇 |
1985年 | 3篇 |
1984年 | 6篇 |
1983年 | 6篇 |
1982年 | 2篇 |
1981年 | 2篇 |
1980年 | 4篇 |
1979年 | 4篇 |
1978年 | 2篇 |
1977年 | 2篇 |
1973年 | 2篇 |
1971年 | 1篇 |
1970年 | 1篇 |
1969年 | 1篇 |
排序方式: 共有678条查询结果,搜索用时 296 毫秒
1.
Although there may not be a direct association between oral hygiene and implant failure, oral hygiene must be maintained around implants in the edentulous mouth. Bacterial plaque on dentures can act as a reservoir for pathogens that cause respiratory disease. Unfortunately, many edentulous patients have poor oral hygiene. In this article, we describe the development of a brochure to educate patients wearing mandibular overdentures supported by 2 implants as a supplement to the dentist"s verbal instructions. Dental literature and several specialists were consulted during preparation of the brochure, which contains photographs accompanying oral hygiene instructions. It was sent to 25 participants who were subsequently called and questioned regarding its content and their oral hygiene habits. The 24 respondents found the brochure useful; most reported that they would keep the brochure for future reference and that they learned something new about how to maintain their implants properly. No one found the brochure too long or unclear. Most participants read the brochure entirely, rather than skimming it. The brochure is available to all clinicians who wish to incorporate this tool into their implant overdenture therapeutic approach. 相似文献
2.
With the rapid evolution of technology and the development and marketing of new procedures in dentistry, dentists have difficulty keeping pace with all of this new technology and information. How do these clinicians know whether a new product, technique or technological advance is good and should be recommended? At what point do they have an obligation to inform their patients about new procedures supported by research? This first report of a 2-part series investigates the ethical aspects of these issues and describes some of the professional ethical dilemmas and obligations involved when new therapies are offered to the public. 相似文献
3.
4.
Azadvari Mohaddeseh Mirmosayyeb Omid Hosseini Maryam Vaheb Saeed Razavi Seyede Zahra Emami 《Neurological sciences》2022,43(6):3879-3892
Neurological Sciences - The prevalence of osteoporosis is reported differently. We designed this systematic review and meta-analysis to estimate pooled prevalence of osteoporosis and osteopenia in... 相似文献
5.
Farzin Rezaei Maryam Emami Shakiba Zahed Mohammad-Javad Morabbi Mohammadhadi Farahzadi Shahin Akhondzadeh 《Daru : journal of Faculty of Pharmacy, Tehran University of Medical Sciences》2015,23(1)
Background
The objective of this randomized, double-blind, placebo-controlled study was to evaluate the efficacy of sustained-release methylphenidate (MPH-SR) in treatment of methamphetamine dependence.Methods
Fifty-six individuals who met DSM-IV-TR criteria for methamphetamine dependence participated in this 10-week trial. The participants were randomly allocated into two groups and received 18 to 54 mg/day sustained-released methylphenidate or placebo for 10 weeks. Craving was evaluated by a visual analogue craving scale every week. Urinary screening test for methamphetamine was carried out each week. The Beck Depression Inventory-II (BDI-II) was used to monitor participant depressive symptoms at baseline and bi-weekly during the treatment period.Results
At the end of the trial, the MPH-SR group was less methamphetamine positive compared to the placebo group and the difference was significant (p = 0.03). By the end of the study, MPH-SR group showed significantly less craving scores compared to the placebo group [MD (95% CI) = -10.28(0.88-19.18), t(54) = 2.19, p = 0.03]. There was greater improvement in the depressive symptoms scores in the intervention group compared to the placebo group [MD (95% CI) =2.03(0.31-3.75), t (54) =2.37, p = 0.02].Conclusion
Sustained-released methylphenidate was safe and well tolerated among active methamphetamine users and significantly reduced methamphetamine use, craving and depressive symptoms.Trial registration
IRCT201202281556N38 相似文献6.
7.
Melika Ehtesham-Gharaee Ameneh Eshaghi Susan Shojaee Javad Asili Seyed Ahmad Emami Javad Behravan 《Drug and chemical toxicology》2015,38(3):293-299
Context: Scutellaria lindbergii Rech. f. (Lamiaceae) is an Iranian species of Scutellaria which has been shown to exert antimicrobial, antioxidant and cytotoxic effects. Objective: The protective properties of total methanol extract (TME) of S. lindbergii and its fractions (defatted and CH2Cl2) were investigated against cytotoxic and genotoxic effects of H2O2 in NIH 3T3 cell line as non-malignant cells. Materials and methods: The cells were incubated with different concentrations of S. lindbergii root extracts [TME (15–250?μg ml?1), defatted fraction (15–500?μg ml?1) and CH2Cl2 fraction (5–40?μg ml?1)] and toxic concentration of H2O2 (200?µM) at 37?°C for 2?h concurrently and Cell viability was quantitated by MTT assay. The antigenotoxic effect of extracts was investigated using comet assay. The cells were incubated with extracts [TME (25–250?μg ml?1), defatted fraction (25–500?μg ml?1) and CH2Cl2 fraction (5–40?μg ml?1)] and H2O2 (25?µM) at 4?°C for 20?min, then the comet assay was performed. DNA damage was expressed as percentage tail DNA. Results: Total methanol extract of S. lindbergii and its fractions had a significant inhibitory effect on DNA damage. The IC50 values of TME, defatted fraction and CH2Cl2 fraction against DNA damage were determined as 48, 138 and 8?μg ml?1, respectively. Conclusion: S. lindbergii extracts can prevent oxidative DNA damage, which is likely due to its flavonoids and phenolic compounds as antioxidant constituents. 相似文献
8.
9.
10.