全文获取类型
收费全文 | 4912篇 |
免费 | 243篇 |
国内免费 | 81篇 |
专业分类
耳鼻咽喉 | 68篇 |
儿科学 | 78篇 |
妇产科学 | 98篇 |
基础医学 | 645篇 |
口腔科学 | 124篇 |
临床医学 | 443篇 |
内科学 | 822篇 |
皮肤病学 | 162篇 |
神经病学 | 329篇 |
特种医学 | 317篇 |
外科学 | 601篇 |
综合类 | 118篇 |
一般理论 | 3篇 |
预防医学 | 249篇 |
眼科学 | 70篇 |
药学 | 618篇 |
中国医学 | 110篇 |
肿瘤学 | 381篇 |
出版年
2023年 | 31篇 |
2022年 | 115篇 |
2021年 | 186篇 |
2020年 | 92篇 |
2019年 | 117篇 |
2018年 | 145篇 |
2017年 | 109篇 |
2016年 | 146篇 |
2015年 | 200篇 |
2014年 | 261篇 |
2013年 | 288篇 |
2012年 | 398篇 |
2011年 | 412篇 |
2010年 | 233篇 |
2009年 | 182篇 |
2008年 | 285篇 |
2007年 | 284篇 |
2006年 | 243篇 |
2005年 | 205篇 |
2004年 | 169篇 |
2003年 | 148篇 |
2002年 | 112篇 |
2001年 | 104篇 |
2000年 | 84篇 |
1999年 | 90篇 |
1998年 | 66篇 |
1997年 | 40篇 |
1996年 | 42篇 |
1995年 | 30篇 |
1994年 | 27篇 |
1993年 | 23篇 |
1992年 | 31篇 |
1991年 | 35篇 |
1990年 | 30篇 |
1989年 | 37篇 |
1988年 | 25篇 |
1987年 | 23篇 |
1986年 | 15篇 |
1985年 | 21篇 |
1984年 | 13篇 |
1983年 | 15篇 |
1982年 | 8篇 |
1981年 | 13篇 |
1980年 | 10篇 |
1978年 | 7篇 |
1975年 | 11篇 |
1974年 | 8篇 |
1971年 | 8篇 |
1969年 | 6篇 |
1968年 | 14篇 |
排序方式: 共有5236条查询结果,搜索用时 15 毫秒
81.
Shin-Hae Lee Hyo-Sun An Yong Woo Jung Eun-Ji Lee Hye-Yeon Lee Eun-Seok Choi Seon Woo An Heehwa Son Seung-Jae Lee Jong-Bae Kim Kyung-Jin Min 《Biogerontology》2014,15(2):153-164
Viscum album coloratum (Korean mistletoe) is a semi-parasitic plant that grows on various trees and has a variety of biological functions such as immunomodulation, apoptosis, and anti-tumor activity. In this study, we investigated the effects of Korean mistletoe extract (KME) on lifespan in experimental models using Caenorhabditis elegans and Drosophila melanogaster. Supplementation of KME at 50 μg/ml extended the mean survival time by 9.61 and 19.86 % in worms and flies, respectively. The longevity benefit of KME was not due to reduced feeding, reproduction, and/or locomotion in flies and worms. The supplementation of KME also did not increase resistance to various stresses including heat shock, oxidative, or starvation stresses. Furthermore, KME did not further extend the lifespan of flies fed a dietary restricted diet but did increase the expression of Sir2, one of the target genes of dietary restriction, suggesting that KME may function as a putative dietary restriction mimetic. These results also suggest that the longevity promoting effects of KME may be an example of mild stress-induced hormesis. 相似文献
82.
83.
Management of incisional scar is intimately connected to stages of wound healing. The management of an elective surgery patient begins with a thorough informed consent process in which the patient is made aware of personal and clinical circumstances that cannot be modified, such as age, ethnicity, and previous history of hypertrophic scars. In scar prevention, the single most important modifiable factor is wound tension during the proliferative and remodeling phases, and this is determined by the choice of incision design. Traditional incisions most often follow relaxed skin tension lines, but no such lines exist in high surface tension areas. If such incisions are unavoidable, the patient must be informed of this ahead of time. The management of a surgical incision does not end when the sutures are removed. Surgical scar care should be continued for one year. Patient participation is paramount in obtaining the optimal outcome. Postoperative visits should screen for signs of scar hypertrophy and has a dual purpose of continued patient education and reinforcement of proper care. Early intervention is a key to control hyperplastic response. Hypertrophic scars that do not improve by 6 months are keloids and should be managed aggressively with intralesional steroid injections and alternate modalities.
Graphical Abstract
相似文献84.
Soo-Byung Park Jong-Kyoon Yoon Yong-Il Kim Dae-Seok Hwang Bong-Hae Cho Woo-Sung Son 《Journal of cranio-maxillo-facial surgery》2012,40(4):e87-e92
BackgroundThe purpose of this study was to evaluate nasal morphologic and maxillary skeletal changes occurring after bimaxillary surgery in skeletal class III patients, using a new method entailing superimposition of cone-beam computed tomography (CBCT) volumes.Materials & methodsThe subjects consisted of 30 adults (15 males and 15 females) who had presented with skeletal class III deformities. The subjects underwent Le Fort I advancement and impaction osteotomy and mandibular setback surgery. For closure of the maxillary vestibular incision, alar cinch suture and V-Y closure were performed. The pre- and post-operative CBCT data were superimposed and evaluated by voxel-by-voxel registration.ResultsAfter surgery, the nasolabial angle, nasal tip angle, nasal tip inclination and columellar angle showed significant increases (P < 0.01). The nasal tip protrusion and nasal height, meanwhile, had significantly decreased (P < 0.01), and the alar base width had increased (P < 0.01). The columellar length and nostril axis angle also had decreased, but the nostril area did not show any significant change.ConclusionsAfter surgery, as the maxilla had been moved upward and forward, the nasal tip was shifted antero-superiorly and the alar base width and nostrils were widened. CBCT superimposition, enabling 3D assessment of nasal morphologic changes, can be an effective tool for simultaneous measurement of skeletal and soft-tissue changes. 相似文献
85.
86.
Sung Ho Choi Sang Gu Lee Chan Woo Park Woo Kyung Kim Chan Jong Yoo Seong Son 《Journal of Korean Neurosurgical Society》2013,53(4):223-227
Objective
Although there is no consensus on the ideal treatment of the craniocervical instability, biomechanical stabilization and bone fusion can be induced through occipito-cervical fusion (OCF). The authors conducted this study to evaluate efficacy of OCF, as well as to explore methods in reducing complications.Methods
A total of 16 cases with craniocervical instability underwent OCF since the year 2002. The mean age of the patients was 51.5 years with a mean follow-up period of 34.9 months. The subjects were compared using lateral X-ray taken before the operation, after the operation, and during last follow-up. The Nurick score was used to assess neurological function pre and postoperatively.Results
All patients showed improvements in myelopathic symptoms after the operation. The mean preoperative Nurick score was 3.1. At the end of follow-up after surgery, the mean Nurick score was 2.0. After surgery, most patients'' posterior occipito-cervical angle entered the normal range as the pre operation angle decresed from 121 to 114 degree. There were three cases with complications, such as, vertebral artery injury, occipital screw failure and wound infection. In two cases with cerebral palsy, occipital screw failures occurred. But, reoperation was performed in one case.Conclusion
OCF is an effective method in treating craniocervical instability. However, the complication rate can be quite high when performing OCF in patients with cerebral palsy, rheumatoid arthritis. Much precaution should be taken when performing this procedure on high risk patients. 相似文献87.
Byung-chul Son Deok-ryeong Kim Sang-won Lee Chung-kee Chough 《Journal of Korean Neurosurgical Society》2013,54(6):501-506
Objective
Spinal cord stimulation (SCS) is an effective means of treatment of chronic neuropathic pain from failed back surgery syndrome (FBSS). Because the success of trial stimulation is an essential part of SCS, we investigated factors associated with success of trial stimulation.Methods
Successful trial stimulation was possible in 26 of 44 patients (63.6%) who underwent insertion of electrodes for the treatment of chronic pain from FBSS. To investigate factors associated with successful trial stimulation, patients were classified into two groups (success and failure in trial). We investigated the following factors : age, sex, predominant pain areas (axial, limb, axial combined with limbs), number of operations, duration of preoperative pain, type of electrode (cylindrical/paddle), predominant type of pain (nociceptive, neuropathic, mixed), degree of sensory loss in painful areas, presence of motor weakness, and preoperative Visual Analogue Scale.Results
There were no significant differences between the two groups in terms of age, degree of pain, number of operations, and duration of pain (p>0.05). Univariate analysis revealed that the type of electrode and presence of severe sensory deficits were significantly associated with the success of trial stimulation (p<0.05). However, the remaining variable, sex, type of pain, main location of pain, degree of pain duration, degree of sensory loss, and presence of motor weakness, were not associated with the trial success of SCS for FBSS.Conclusion
Trial stimulation with paddle leads was more successful. If severe sensory deficits occur in the painful dermatomes in FBSS, trial stimulation were less effective. 相似文献88.
Seung-Hyun Son Mark O’Reilly Giulio E. Lancioni 《Developmental neurorehabilitation》2013,16(4):389-395
This study compared acquisition and preference for two types of augmentative and alternative communication (AAC) systems in three pre-schoolers with autism. Acquisition of requesting behaviour using a picture-exchange system vs a voice-output communication aide (VOCA) was compared in an alternating treatments design. Following acquisition, both ACC systems were simultaneously available and the child could select which one of the two systems to use. There was little difference between picture-exchange and VOCA in terms of acquisition rates. Two children demonstrated a consistent preference for picture-exchange and the third showed a preference for the VOCA. Both speed of acquisition and system preference should be considered when designing AAC interventions for children with autism and related developmental disabilities.Comparamos la adquisición y preferencia en relación a dos tipos de sistemas (AAC) de comunicación alternativa y aumentativa en 3 preescolares con autismo. Se comparó la adquisición de un comportamiento solicitado a través del uso de un sistema de intercambio de dibujos contra una ayuda de comunicación de producción de voz (VOCA), en un diseño de tratamiento alternativo. Después de la adquisición ambos sistemas AAC estuvieron disponibles en forma simultánea, y el niño podía seleccionar cuál de los dos sistemas usar. Hubo poca diferencia entre el intercambio de dibujos y VOCA en término de tasas de adquisición. Dos niños demostraron una preferencia consistente para el intercambio de dibujos y el tercero demostró una preferencia por la VOCA. Tanto la velocidad de adquisición como la preferencia por un sistema deberán ser consideradas cuando se diseñen intervenciones con AAC para niños con autismo y discapacidades en el desarrollo relacionadas.Palabras Clave: comunicación alternativa y aumentativa, intercambio de dibujos, ayudas de comunicación de producción de la voz, adquisición, autismo. 相似文献
89.
90.
Hideki Ioi DDS PhD Sangwook Kang DDS MSD Takahiro Shimomura DDS PhD Seong‐Sik Kim DDS MSD PhD Soo‐Byung Park DDS MSD PhD Woo‐Sung Son DDS MSD PhD Ichiro Takahashi DDS PhD 《Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.]》2013,25(4):274-282