全文获取类型
收费全文 | 1490篇 |
免费 | 95篇 |
国内免费 | 26篇 |
专业分类
耳鼻咽喉 | 2篇 |
儿科学 | 59篇 |
妇产科学 | 115篇 |
基础医学 | 163篇 |
口腔科学 | 18篇 |
临床医学 | 138篇 |
内科学 | 580篇 |
皮肤病学 | 7篇 |
神经病学 | 64篇 |
特种医学 | 29篇 |
外科学 | 255篇 |
综合类 | 3篇 |
一般理论 | 1篇 |
预防医学 | 48篇 |
眼科学 | 41篇 |
药学 | 32篇 |
肿瘤学 | 56篇 |
出版年
2023年 | 10篇 |
2022年 | 10篇 |
2021年 | 34篇 |
2020年 | 21篇 |
2019年 | 39篇 |
2018年 | 29篇 |
2017年 | 22篇 |
2016年 | 24篇 |
2015年 | 34篇 |
2014年 | 58篇 |
2013年 | 48篇 |
2012年 | 71篇 |
2011年 | 79篇 |
2010年 | 57篇 |
2009年 | 47篇 |
2008年 | 97篇 |
2007年 | 119篇 |
2006年 | 99篇 |
2005年 | 111篇 |
2004年 | 92篇 |
2003年 | 79篇 |
2002年 | 108篇 |
2001年 | 25篇 |
2000年 | 32篇 |
1999年 | 27篇 |
1998年 | 19篇 |
1997年 | 16篇 |
1996年 | 11篇 |
1995年 | 13篇 |
1994年 | 12篇 |
1993年 | 9篇 |
1992年 | 23篇 |
1991年 | 9篇 |
1990年 | 11篇 |
1989年 | 12篇 |
1988年 | 15篇 |
1987年 | 11篇 |
1986年 | 13篇 |
1985年 | 6篇 |
1984年 | 6篇 |
1981年 | 4篇 |
1980年 | 5篇 |
1979年 | 5篇 |
1978年 | 6篇 |
1977年 | 3篇 |
1976年 | 6篇 |
1974年 | 4篇 |
1971年 | 3篇 |
1969年 | 5篇 |
1966年 | 3篇 |
排序方式: 共有1611条查询结果,搜索用时 0 毫秒
41.
Yaron M Osher E Izkhakov E Rosenfeld JB Stern N 《Clinical and experimental hypertension (New York, N.Y. : 1993)》2012,34(5):321-327
Low diastolic blood pressure (DBP) is commonly seen in well-controlled hypertensive subjects. We evaluated arterial properties in 53 hypertensive subjects with low on-treatment DBP (<70 mm Hg; LODP), 54 subjects with normal BP and spontaneously low DBP (SLDP), and 52 treated hypertensive subjects with DBP ≥70 mm Hg (HNDP). The two measures of large artery rigidity, pulse wave velocity and augmentation index, were similar in LODP and SLDP groups. In contrast, the HNDP group had higher PWV and the lowest large and small artery compliance in comparison with all other groups. Low on-treatment DBP is associated with favorable arterial properties in mid-older hypertensive patients. 相似文献
42.
43.
44.
Quinolone resistance of Salmonella enterica serovar Virchow isolates from humans and poultry in Israel: evidence for clonal expansion 下载免费PDF全文
Solnik-Isaac H Weinberger M Tabak M Ben-David A Shachar D Yaron S 《Journal of clinical microbiology》2007,45(8):2575-2579
Salmonella enterica serovar Virchow is highly prevalent in humans and farm animals in Israel. In addition to high rates of resistance to multiple antibiotics, this serovar exhibits a high incidence of resistance to nalidixic acid. More than 90% of Salmonella serovar Virchow isolates of human and poultry origin obtained from 1997 to 2004 were resistant to nalidixic acid (MIC > or = 128 microg/ml), with reduced susceptibility to ciprofloxacin (MIC between 0.125 and 0.250 microg/ml). Most isolates belonged to two predominant, closely related pulsed-field gel electrophoresis image types. Investigation of the mechanisms of quinolone resistance revealed that this pathogen probably emerged from a parental clone that overproduced the AcrAB efflux pump and had a single point mutation in gyrA leading to the Asp87Tyr substitution. The close resemblance between human and poultry isolates points to poultry as a likely source of Salmonella serovar Virchow in the food chain. 相似文献
45.
Yulia Vaisbourd Mourad Dahhou Xun Zhang Ruth Sapir-Pichhadze Heloise Cardinal Olwyn Johnston Tom D. Blydt-Hansen Lee Anne Tibbles Lorraine Hamiwka Simon Urschel Patricia Birk Janice Bissonnette Mina Matsuda-Abedini Jennifer Harrison BScPhm Jeffrey Schiff Veronique Phan Sabina De Geest Upton Allen Yaron Avitzur Seema Mital Bethany J. Foster 《Pediatric transplantation》2023,27(2):e14446
46.
Kent Ilan Geffen Noa Stein Assaf Rudnicki Yaron Friehmann Asaf Avital Shmuel 《Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie》2020,258(3):607-611
Graefe's Archive for Clinical and Experimental Ophthalmology - Colonoscopy is an endoscopic examination of the bowel. It requires insufflation of the large bowel lumen with gas which leads to... 相似文献
47.
Lior Rosenberg Yuval Krieger Alex Bogdanov-Berezovski Eldad Silberstein Yaron Shoham Adam J. Singer 《Burns : journal of the International Society for Burn Injuries》2014
Objectives
Excisional debridement followed by autografting is the standard of care (SOC) for deep burns, but is associated with serious potential complications. Conservative, non-surgical and current enzymatic debridement methods are inefficiently slow. We determined whether a non-surgical option of rapid enzymatic debridement with the debriding enzyme NexoBrid™ (NXB) would reduce need for surgery while achieving similar esthetic and functional outcomes as SOC.Methods
We conducted a multi-center, open-label, randomized, controlled clinical trial including patients aged 4-55 years with deep partial and full thickness burns covering 5-30% of their total body surface area (TBSA). Patients were randomly assigned to burn debridement with NXB (applied for 4 h) or SOC, which included surgical excisional or non-surgical debridement.Results
NXB significantly reduced the time from injury to complete débridement (2.2 vs. 8.7 days, P < 0.0001), need for surgery (24.5% vs. 70.0%, P < 0.0001), the area of burns excised (13.1% vs. 56.7%, P < 0.0001) and the need for autografting (17.9% vs. 34.1%, P = 0.01). Scar quality and quality of life scores were similar in both study groups as were the rates of adverse events.Conclusions
Enzymatic débridement with NXB resulted in reduced need for and extent of surgery compared with SOC while achieving comparable long-term results in patients with deep burns.Trial registration
: Clinical Trials.gov NCT00324311. 相似文献48.
Ulrika Segersten Yael Spector Yaron Goren Sarit Tabak Per-Uno Malmström 《Urologic oncology》2014,32(5):613-618
ObjectiveTo analyze microRNA profile in Ta and T1 urinary bladder cancers in combination and separately and to relate this to the risk of later developing higher-stage disease.Materials and methodsFormalin-fixed, paraffin-embedded samples of 44 Ta and 42 T1 bladder cancers representing cases with and without stage progression during follow-up were collected and microRNA expression levels were measured by microarray analysis.ResultsIn a comparison between the progressors and controls, in the Ta/T1 group, miR-10a-5p and miR-31-5p were differentially expressed. miR-10a-5p was also correlated to time to progression (P = 0.00012). In the subgroup analysis, 3 microRNAs, miR-10a-5p, miR-31-5p, and miR-130a-3p, were differentially expressed among Ta tumors and had a fold change of more than 1.5 (P<0.038). The comparison concerning microRNA expression between the progressors and controls in category T1 cancers revealed no significant differences.ConclusionsProfiling revealed that certain microRNAs predicted the risk of developing higher-stage disease among patients with Ta cancers. Lower miR-10a-5p expression in Ta progressing tumors indicates that this microRNA could be important for later malignant potential among this group of patients. 相似文献
49.
Konigstein Maayan Biner Simon Topilsky Yan Abramowitz Yigal Havakuk Ofer Ben-Assa Eyal Leshem-Rubinow Eran Arbel Yaron Keren Gad Banai Shmuel Finkelstein Ariel 《Journal of Echocardiography》2014,12(1):17-23
Background
Aortic stenosis is associated with concentric left ventricle (LV) hypertrophy or remodeling resulting in impaired diastolic function and elevated left-sided filling pressure. We investigated the changes in LV geometry and LV filling hemodynamics, giving emphasis to parameters associated with changes in diastolic function after transcatheter aortic valve implantation (TAVI).Methods
Comprehensive diastolic assessment was performed before and six months after TAVI in 70 patients with severe aortic stenosis. Patients with any degree of mitral stenosis or >mild left-sided valvular regurgitation were excluded.Results
In the entire cohort six months after TAVI, LV end-diastolic diameter increased (44.1 ± 6 versus 45 ± 6 mm, P = 0.02), whereas LV mass and relative wall thickness (RWT) decreased (270.1 ± 76 versus 245.1 ± 75 g and 0.53 ± 0.15 versus 0.46 ± 0.1, respectively; P < 0.0001 for both). Lateral e′ increased (5.8 ± 2 versus 6.6 ± 3 cm/s, P = 0.03) and left atrium (LA) volume, E/e′ ratio, and systolic pulmonary pressure decreased (88.1 ± 30 versus 80 ± 28 cc, 18 ± 7.8 versus 16.3 ± 5.5, and 42.7 ± 14.9 versus 38.7 ± 12 mmHg, respectively; P < 0.05 for all), suggesting reduction in LA pressure. The improvement in LA volume and E/e′ was almost exclusively seen in patients with LV hypertrophy before TAVI (P < 0.05 both), as opposed to patients with concentric remodeling.Conclusions
In our preliminary study, TAVI resulted in LV and LA reverse remodeling, and improved LV relaxation and LA filling pressure in patients with severe aortic stenosis and concentric hypertrophy. Patients with concentric remodeling at baseline seem to have limited improvement in LV diastolic function and filling pressure following TAVI, but larger clinical trials would be required to conclude if they have no improvement at all. 相似文献50.
Daniela Dünn-Kittenplon Asaf Ashkenazy-Titelman Inna Kalt Jean-Paul Lellouche Yaron Shav-Tal Ronit Sarid 《Viruses》2021,13(4)
Kaposi’s sarcoma-associated herpesvirus (KSHV) is a cancer-related herpesvirus. Like other herpesviruses, the KSHV icosahedral capsid includes a portal vertex, composed of 12 protein subunits encoded by open reading frame (ORF) 43, which enables packaging and release of the viral genome into the nucleus through the nuclear pore complex (NPC). Capsid vertex-specific component (CVSC) tegument proteins, which directly mediate docking at the NPCs, are organized on the capsid vertices and are enriched on the portal vertex. Whether and how the portal vertex is selected for docking at the NPC is unknown. Here, we investigated the docking of incoming ORF43-null KSHV capsids at the NPCs, and describe a significantly lower fraction of capsids attached to the nuclear envelope compared to wild-type (WT) capsids. Like WT capsids, nuclear envelope-associated ORF43-null capsids co-localized with different nucleoporins (Nups) and did not detach upon salt treatment. Inhibition of nuclear export did not alter WT capsid docking. As ORF43-null capsids exhibit lower extent of association with the NPCs, we conclude that although not essential, the portal has a role in mediating the interaction of the CVSC proteins with Nups, and suggest a model whereby WT capsids can dock at the nuclear envelope through a non-portal penton vertex, resulting in an infection ‘dead end’. 相似文献