全文获取类型
收费全文 | 266篇 |
免费 | 22篇 |
专业分类
儿科学 | 10篇 |
妇产科学 | 11篇 |
基础医学 | 43篇 |
口腔科学 | 4篇 |
临床医学 | 17篇 |
内科学 | 58篇 |
皮肤病学 | 14篇 |
神经病学 | 27篇 |
特种医学 | 5篇 |
外科学 | 42篇 |
综合类 | 4篇 |
预防医学 | 2篇 |
眼科学 | 5篇 |
药学 | 24篇 |
肿瘤学 | 22篇 |
出版年
2023年 | 4篇 |
2022年 | 13篇 |
2021年 | 13篇 |
2020年 | 18篇 |
2019年 | 17篇 |
2018年 | 15篇 |
2017年 | 11篇 |
2016年 | 12篇 |
2015年 | 12篇 |
2014年 | 13篇 |
2013年 | 17篇 |
2012年 | 16篇 |
2011年 | 19篇 |
2010年 | 12篇 |
2009年 | 6篇 |
2008年 | 16篇 |
2007年 | 10篇 |
2006年 | 9篇 |
2005年 | 9篇 |
2004年 | 18篇 |
2003年 | 8篇 |
2002年 | 2篇 |
2001年 | 2篇 |
1999年 | 3篇 |
1996年 | 2篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1992年 | 2篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1975年 | 1篇 |
排序方式: 共有288条查询结果,搜索用时 15 毫秒
1.
J. Bishara N. Hadari M. Shalita-Chesner Z. Samra O. Ofir M. Paul N. Peled S. Pitlik Y. Molad 《European journal of clinical microbiology & infectious diseases》2007,26(9):647-650
The aim of the present study was to evaluate whether soluble triggering receptor expressed on myeloid cells (sTREM-1) is present
in the cerebrospinal fluid (CSF) of patients with acute meningitis and if its presence can predict bacterial infection. We
found elevated levels of sTREM-1 in the CSF of seven of the nine (78%) patients with culture-positive specimens and in none
of 12 (0%) patients with culture-negative specimens (sensitivity: 78%; specificity: 100%). The area under the receiver operating
characteristic curve for sTREM-1 in the CSF as a predictor for bacterial meningitis was 0.889. This suggests that sTREM-1
is upregulated in the CSF of patients with bacterial meningitis with high specificity and that its presence can potentially
assist clinicians in the diagnosis of bacterial meningitis. 相似文献
2.
3.
Assi Levi Dan Ben Amitai Daniel Mimouni Yael A. Leshem Ofir Arzi Moshe Lapidoth 《Lasers in medical science》2018,33(3):597-601
The verrucous epidermal nevus (VEN) is the most common type of epidermal nevi. As lesions can be disfiguring, treatment is often sought. Many therapeutic approaches have been reported, with variable efficacy and safety. Picosecond (PS) lasers are novel laser devices designated to target small chromophores. A side effect of these lasers is blistering due to epidermal-dermal separation. We aimed to harness this side effect of the PS lasers to treat patients with VEN. The purpose of this study was to report our experience treating VEN using a PS 532-nm laser. We present a retrospective case series of six patients with large VEN who were treated using a PS 532-nm laser (2–6 treatments, 8–10 weeks apart). Response in clinical photographs was assessed by two independent dermatologists and graded on a scale of 0 (exacerbation) to 4 (76–100% improvement). Patient satisfaction was recorded on a scale of 1–5. All patients demonstrated significant improvement. Average improvement was 3.7 on the quartile scale of improvement. Patient satisfaction rate averaged 4.7. The PS 532-nm laser is a promising novel modality for the treatment of large VEN. 相似文献
4.
Erez Peterfreund Ofir Lindenbaum Felix Dietrich Tom Bertalan Matan Gavish Ioannis G. Kevrekidis Ronald R. Coifman 《Proceedings of the National Academy of Sciences of the United States of America》2020,117(49):30918
We propose a local conformal autoencoder (LOCA) for standardized data coordinates. LOCA is a deep learning-based method for obtaining standardized data coordinates from scientific measurements. Data observations are modeled as samples from an unknown, nonlinear deformation of an underlying Riemannian manifold, which is parametrized by a few normalized, latent variables. We assume a repeated measurement sampling strategy, common in scientific measurements, and present a method for learning an embedding in that is isometric to the latent variables of the manifold. The coordinates recovered by our method are invariant to diffeomorphisms of the manifold, making it possible to match between different instrumental observations of the same phenomenon. Our embedding is obtained using LOCA, which is an algorithm that learns to rectify deformations by using a local z-scoring procedure, while preserving relevant geometric information. We demonstrate the isometric embedding properties of LOCA in various model settings and observe that it exhibits promising interpolation and extrapolation capabilities, superior to the current state of the art. Finally, we demonstrate LOCA’s efficacy in single-site Wi-Fi localization data and for the reconstruction of three-dimensional curved surfaces from two-dimensional projections. 相似文献
5.
Ofir Moreno Todd Butler Vanessa Zann Ashley Willson Pui Leung Alyson Connor 《Clinical therapeutics》2018,40(11):1855-1867
Purpose
ME-401 is a novel selective inhibitor of phosphatidylinositol 3 kinase p110δ, an enzyme often found overexpressed and overactive in B-cell malignancies. The current study was performed to assess the safety, tolerability, pharmacokinetics, and pharmacodynamics of single ascending oral doses of ME-401 in healthy volunteers.Methods
This analysis was an open-label, nonrandomized study in healthy male volunteers. Three sequential groups were dosed. Each group received single doses of ME-401 on two occasions; the doses tested ranged from 10 to 150 mg. Blood was drawn at various time points to analyze plasma concentrations of ME-401 and inhibition of basophil activation, a marker of phosphatidylinositol 3 kinase p110δ inhibition.Findings
Fifteen subjects received a single dose of ME-401 on two occasions. Three adverse events that were considered possibly related to the study drug were reported: one event of pain, one event of headache, and one event of upper abdominal pain. ME-401 exhibited dose proportionality up to 60 mg, and supra-proportional increases in exposure were observed above doses of 60 mg. In addition, there was a dose-proportional increase in the inhibition of basophil activation up to 60 mg. Mean t1/2 ranged from 9.36 to 29.23 hours across the dose range. A 60 mg dose of ME-401 approached 90% inhibition of basophil activation, and thereafter no further increase to the percent inhibition of basophil activation was observed for higher doses. Once-daily dosing of 60 mg ME-401 was forecasted to result in trough plasma levels exceeding the concentration needed for 90% inhibition of basophil activation.Implications
This first-in-human study showed that ME-401 was well tolerated after single doses up to 150 mg. Pharmacologic activity was confirmed after administration of single ascending oral doses of 10 to 150 mg. ME-401 60 mg, administered once daily, was selected as the starting dose for patient studies. ClinicalTrials.gov identifier: NCT02521389. 相似文献6.
Asaf Sol Ofir Ginesin Stella Chaushu Laila Karra Shunit Coppenhagen-Glazer Isaac Ginsburg Gilad Bachrach 《Infection and immunity》2013,81(10):3577-3585
Host defense peptides are immediate responders of the innate immunity that express antimicrobial, immunoregulatory, and wound-healing activities. Neutrophils are a major source for oral host defense peptides, and phagocytosis by neutrophils is a major mechanism for bacterial clearance in the gingival tissue. Dysfunction of or reduction in the numbers of neutrophils or deficiency in the LL-37 host defense peptide was each previously linked with proliferation of oral Aggregatibacter actinomycetemcomitans which resulted in an aggressive periodontal disease. Surprisingly, A. actinomycetemcomitans shows resistance to high concentrations of LL-37. In this study, we demonstrated that submicrocidal concentrations of LL-37 inhibit biofilm formation by A. actinomycetemcomitans and act as opsonins and agglutinins that greatly enhance its clearance by neutrophils and macrophages. Improved uptake of A. actinomycetemcomitans by neutrophils was mediated by their opsonization with LL-37. Enhanced phagocytosis and killing of A. actinomycetemcomitans by murine macrophage-like RAW 264.7 cells were dependent on their preagglutination by LL-37. Although A. actinomycetemcomitans is resistant to the bactericidal effect of LL-37, our results offer a rationale for the epidemiological association between LL-37 deficiency and the expansion of oral A. actinomycetemcomitans and indicate a possible therapeutic use of cationic peptides for host defense. 相似文献
7.
8.
Purpose
This study was designed to compare the outcome of two surgical approaches for treating femoral periprosthetic fractures around a stable femoral stem. The hypothesis was that plate fixation alone might be associated with a higher complication rate due to insufficient mechanical stability. We also considered that the addition of a strut allograft would contribute to fracture healing by means of osteoconduction.Methods
We retrospectively assessed the outcome of 21 patients who sustained periprosthetic fractures around a total hip replacement system (Vancouver type B1 and type C fractures) and who were treated in our department (January 2006 and August 2011) either by plate fixation alone or by plate fixation and a strut allograft. The mean postoperative follow-up was 23 months (range 9–69 months). Eleven patients were treated by plate fixation alone (Plate Group), and 10 patients were treated by plate fixation and a deep frozen cortical strut allograft (AG Group). Functional outcome was rated by the Harris Hip scoring system. Postoperative radiographs were assessed for evidence of fracture union. Surgical failure was defined as any complication requiring surgical revision.Results
The 21 patients included 17 females and 4 males. The average age was 79 years (range, 73–88) for the Plate Group and 82 years (range, 53–94) for the AG Group, and the average time to fracture union was 12 weeks (range, 2.5–6 months) and 12.95 weeks (range, 1.5–3) respectively. The overall failure rate was significantly higher in the Plate Group: 5 of them required revision surgery compared to none in the AG Group (p = 0.014).Conclusion
The results of this analysis indicate that a strut allograft augmentation approach to Vancouver type B1 and type C periprosthetic fractures results in a better outcome than plate fixation alone by apparently adding mechanical stability and enhancing the biological healing process. 相似文献9.
10.
Nimrod Dar Shani Pillar Asaf Friehmann Avner Belkin Shay Ofir 《International ophthalmology》2020,40(1):73-79
To compare the clinical features, visual outcomes and causative organisms between endophthalmitis secondary to cataract surgery or to intravitreal injections (IVI). Meir Medical Center, Kfar Saba, Israel. Retrospective, non-randomized comparative chart review. Medical records of patients with proven or suspected endophthalmitis admitted to the Ophthalmology Department at Meir Medical Center 2/2002–2/2017 were reviewed. Clinical characteristics including presenting and final visual acuity (VA) outcomes, causative organisms and time to admission were assessed. Among 84 patients in our study, 35 had preceding cataract surgery and 12 had preceding IVI. The post-cataract group showed a significant improvement in VA following treatment with a presenting and final VA (logMar ± SD) of (1.80 ± 0.54 and 1.39 ± 0.65, P < 0.01) as opposed to the post-IVI group (1.72 ± 0.26 and 1.81 ± 0.32, P = 0.692), while most patients in the cataract group exhibited some degree of VA recovery (70.96%). Patients undergoing cataract surgery were divided into two separate groups; those who underwent cataract surgery in a private center and those operated at a public center. Patients undergoing surgery at a private medical center showed improvement in VA outcomes following treatment (1.80 ± 0.57 and 1.13 ± 0.66, P < 0.01) as opposed to those operated on at our public medical center. Overall, patients with endophthalmitis following cataract surgery had better visual outcomes and were more likely to show a VA improvement following treatment when compared with endophthalmitis following IVI. Final VA outcomes of patients with endophthalmitis after cataract surgery performed in a private center were better than those operated on and treated in a public medical center. 相似文献