全文获取类型
收费全文 | 427篇 |
免费 | 22篇 |
专业分类
耳鼻咽喉 | 5篇 |
儿科学 | 8篇 |
妇产科学 | 6篇 |
基础医学 | 70篇 |
口腔科学 | 6篇 |
临床医学 | 37篇 |
内科学 | 98篇 |
皮肤病学 | 15篇 |
神经病学 | 32篇 |
特种医学 | 10篇 |
外科学 | 104篇 |
综合类 | 5篇 |
预防医学 | 16篇 |
眼科学 | 15篇 |
药学 | 10篇 |
肿瘤学 | 12篇 |
出版年
2024年 | 1篇 |
2023年 | 4篇 |
2022年 | 11篇 |
2021年 | 12篇 |
2020年 | 6篇 |
2019年 | 9篇 |
2018年 | 14篇 |
2017年 | 14篇 |
2016年 | 9篇 |
2015年 | 14篇 |
2014年 | 17篇 |
2013年 | 11篇 |
2012年 | 39篇 |
2011年 | 37篇 |
2010年 | 24篇 |
2009年 | 19篇 |
2008年 | 29篇 |
2007年 | 26篇 |
2006年 | 17篇 |
2005年 | 14篇 |
2004年 | 16篇 |
2003年 | 12篇 |
2002年 | 14篇 |
2001年 | 9篇 |
2000年 | 11篇 |
1999年 | 10篇 |
1998年 | 9篇 |
1996年 | 7篇 |
1995年 | 2篇 |
1994年 | 4篇 |
1992年 | 4篇 |
1991年 | 3篇 |
1989年 | 3篇 |
1988年 | 3篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1979年 | 1篇 |
1978年 | 3篇 |
1977年 | 1篇 |
1976年 | 1篇 |
1972年 | 1篇 |
1970年 | 1篇 |
1966年 | 1篇 |
排序方式: 共有449条查询结果,搜索用时 15 毫秒
91.
Carcinoma originating in bone is uncommon; most of them apparently arise in odontogenic cysts. In this paper, we report an extremely rare case in which, verrucous carcinoma originated from an odontogenic cyst. This lesion was firm and non-tender on palpation and had a white-pink appearance. It was encased in the anterior aspect of the maxilla and exhibited microscopic features of verrucous carcinoma of the oral mucosa. After surgical enucleation, no recurrence or metastasis has been observed up to now. It is mandatory to correlate the clinical and histopathologic findings to establish a true diagnosis. 相似文献
92.
Although the incidence of ocular trauma has been clearly described in developed countries, few published data are available
on the epidemiology and the effects of parameters that can influence the incidence and severity of ocular injuries in Iran.
The present study tried to determine epidemiological aspects of ocular traumatic injuries and evaluate their effects on different
types of ocular injury. The case series included 1950 consecutive patients with acute ophthalmic trauma presented to the emergency
ward of Farabi Hospital in Tehran. Information was collected by interviewing patients and having them fill in a questionnaire.
The final diagnosis was made by a medical resident. If there was a difficulty or doubt in diagnosis or classification, confirmation
of diagnosis was made by senior faculty. Ocular injuries were classified into globe and non-globe injuries according to the
site of injury. Mechanical globe injuries were classified according to Birmingham Eye Trauma Terminology (BETT) into closed
and open injuries. The mean age of patients was 28.8 ± 12.8 years; 87.6% were male. The most common causes of injury were
work-related (49.0%) and chance events (42.0%). The most frequent ocular injury was globe injury (95.6%), including mechanical
(77.6% closed and 5.9% open), chemical (7.6%), photic (2.3%) and thermal (2.2%) injuries. Non-globe injury also occurred in
10.8% of patients; both globe and non-globe injuries occurred in 6.5% of patients. The hospitalization rate in all patients
was 8.8%. Previous history of eye trauma was significantly more common in the group with isolated globe injuries (P < 0.001). History of eye trauma is a risk factor for globe injuries and female gender is a risk factor only for non-globe
injuries. These two factors may predict future eye injury and increase its risk by 5.2 and 1.6 times, respectively. 相似文献
93.
94.
Pourasghar F Malekafzali H Koch S Fors U 《International journal of technology assessment in health care》2008,24(4):445-451
OBJECTIVES: Information technology is a rapidly expanding branch of science which has affected other sciences. One example of using information technology in medicine is the Electronic Medical Records system. One medical university in Iran decided to introduce such system in its hospital. This study was designed to identify the factors which influence the quality of medical documentation when paper-based records are replaced with electronic records. METHODS: A set of 300 electronic medical records was randomly selected and evaluated against eleven checklists in terms of documentation of medical information, availability, accuracy and ease of use. To get the opinion of the care-providers on the electronic medical records system, ten physicians and ten nurses were interviewed by using of semi-structured guidelines. The results were also compared with a prior study with 300 paper-based medical records. RESULTS: The quality of documentation of the medical records was improved in areas where nurses were involved, but those parts which needed physicians' involvement were actually worse. High workloads, shortage of bedside hardware and lack of software features were prominent influential factors in the quality of documentation. The results also indicate that the retrieval of information from the electronic medical records is easier and faster, especially in emergency situations. CONCLUSIONS: The electronic medical records system can be a good substitute for the paper-based medical records system. However, according to this study, some factors such as low physician acceptance of the electronic medical record system, lack of administrative mechanisms (for instance supervision, neglecting physicians and/or nurses in the development and implementation phases and also continuous training), availability of hardware as well as lack of specific software features can negatively affect transition from a paper-based system to an electronic system. 相似文献
95.
96.
Felicitas Merz Frank Gaunitz Faramarz Dehghani Christof Renner Jürgen Meixensberger Angelika Gutenberg Alf Giese Kosta Schopow Christian Hellwig Michael Sch?fer Manfred Bauer Horst St?cker Gisela Taucher-Scholz Marco Durante Ingo Bechmann 《Neuro-oncology》2013,15(6):670-681
Background
Glioblastoma multiforme is the most common lethal brain tumor in human adults, with no major therapeutic breakthroughs in recent decades. Research is based mostly on human tumor cell lines deprived of their organotypic environment or inserted into immune-deficient animals required for graft survival. Here, we describe how glioblastoma specimens obtained from surgical biopsy material can be sectioned and transferred into cultures within minutes.Methods
Slices were kept in 6-well plates, allowing direct observation, application of temozolomide, and irradiation. At the end of experiments, slice cultures were processed for histological analysis including hematoxylin-eosin staining, detection of proliferation (Ki67), apoptosis/cell death (cleaved caspase 3, propidium iodide), DNA double-strand breaks (γH2AX), and neural subpopulations. First clinical trials employed irradiation with the heavy ion carbon for the treatment of glioblastoma patients, but the biological effects and most effective dose regimens remain to be established. Therefore, we developed an approach to expose glioblastoma slice cultures to 12C and X-rays.Results
We found preservation of the individual histopathology over at least 16 days. Treatments resulted in activation of caspase 3, inhibition of proliferation, and cell loss. Irradiation induced γH2AX. In line with clinical observations, individual tumors differed significantly in their susceptibility to temozolomide (0.4%–2.5% apoptosis and 1%–15% cell loss).Conclusion
Glioblastoma multiforme slice cultures provide a unique tool to explore susceptibility of individual tumors for specific therapies including heavy ions, thus potentially allowing more personalized treatments plus exploration of mechanisms of (and strategies to overcome) tumor resistance. 相似文献97.
98.
Faramarz Memari Reza Mostafavi Tabatabaee Hamid Borghei Razavi Seyed-Mohammad Fereshtehnejad Ahmad Daneshi 《European archives of oto-rhino-laryngology》2009,266(9):1373-1380
Resection of the petrous temporal bone to various degrees provides different levels of access to lesions of the posterior
fossa. However, regarding the numerous variations, precise distances of petrosal bone are not still clearly described. This
may lead to serious complications during transpetrosal surgeries. Our objective was to evaluate different distances of temporal
bone landmarks in order to assess their variations and the possible correlations between them. This anatomical study was performed
on 60 temporal bones from 60 human cadavers in the years 2006 and 2007. All the bones contained an adequate portion of the
petrous apex and attached fossa dura. Twelve landmarks were defined and 27 different distances were measured for each temporal
bone using two-point caliper. Less variation was observed in the superoinferior diameter of horizontal carotid canal with
the less coefficient of variation (CV) of 9.29; whereas, the most variation was detected in the inferior (axial) plane of
posterior semicircular canal to superior plane of jugular bulb (CV = 57.65). There was a significant correlation between vertical
intratemporal diameter of carotid in pyramidal direction, and superior–inferior diameter of horizontal carotid canal (r
Pearson = 0.500, P < 0.001). Other significant correlations were also found between other distances. The variations of different distances and
landmarks were evaluated and many significant correlations were demonstrated between them which could potentially aid ENT
specialists and neurosurgeons in order to approach anatomical landmarks and cranial fossas more safely during otologic and
neurotologic surgeries. It could also help the design of middle ear prosthesis. 相似文献
99.
100.
Jorge Calles-Escand��n Laura C. Lovato Denise G. Simons-Morton David M. Kendall Rodica Pop-Busui Robert M. Cohen Denise E. Bonds Vivian A. Fonseca Faramarz Ismail-Beigi Mary Ann Banerji Alan Failor Bruce Hamilton 《Diabetes care》2010,33(4):721-727