全文获取类型
收费全文 | 322篇 |
免费 | 16篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 8篇 |
妇产科学 | 5篇 |
基础医学 | 33篇 |
口腔科学 | 8篇 |
临床医学 | 33篇 |
内科学 | 45篇 |
皮肤病学 | 16篇 |
神经病学 | 28篇 |
特种医学 | 2篇 |
外科学 | 26篇 |
综合类 | 2篇 |
预防医学 | 28篇 |
眼科学 | 62篇 |
药学 | 23篇 |
中国医学 | 1篇 |
肿瘤学 | 17篇 |
出版年
2024年 | 1篇 |
2023年 | 3篇 |
2022年 | 9篇 |
2021年 | 25篇 |
2020年 | 9篇 |
2019年 | 15篇 |
2018年 | 12篇 |
2017年 | 9篇 |
2016年 | 14篇 |
2015年 | 9篇 |
2014年 | 20篇 |
2013年 | 19篇 |
2012年 | 34篇 |
2011年 | 45篇 |
2010年 | 11篇 |
2009年 | 13篇 |
2008年 | 17篇 |
2007年 | 9篇 |
2006年 | 11篇 |
2005年 | 10篇 |
2004年 | 8篇 |
2003年 | 7篇 |
2002年 | 6篇 |
2001年 | 5篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1989年 | 1篇 |
1986年 | 1篇 |
1982年 | 1篇 |
1976年 | 2篇 |
1969年 | 1篇 |
1968年 | 1篇 |
1966年 | 1篇 |
1957年 | 1篇 |
1956年 | 1篇 |
1954年 | 1篇 |
1947年 | 1篇 |
1927年 | 1篇 |
排序方式: 共有338条查询结果,搜索用时 31 毫秒
1.
With regard to cadmium toxicity, Drosophila strains v;bw and Austin represent extremes in resistance and sensitivity, respectively. Both strains produced metallothionein (MT) in response to Cd ions in their diet. Austin produced more metallothionein than v;bw at Cd ion levels below 0.2 mM, when both strains were allowed lifetime development on Cd2+-containing media. When the rate of MT appearance was measured for 4 days in young adults the results showed no clear trend with time within a strain or between strains. The plot of LC50 vs. MT levels for identical developmental conditions revealed that for v;bw small increases in MT corresponded to large increases in resistance whereas for the sensitive Austin even large increases in MT had comparatively little effect on increasing LC50. Results given here suggest that differences in total MT content do not explain the genetically demonstrable difference in Cd2+-resistance between v;bw and Austin. However, since two MT genes are identified in Drosophila, differences in resistance could be reflective of greater relative amounts of one "more important" MT in the resistant fly. 相似文献
2.
M I Steele T L Kuhls K Nida C S Meka I M Halabi D A Mosier W Elliott D L Crawford R A Greenfield 《Infection and immunity》1995,63(10):3840-3845
3.
Fatima Nida Massaad Elie Hadzipasic Muhamed Shankar Ganesh M. Shin John H. 《Neurosurgical review》2021,44(3):1357-1370
Neurosurgical Review - Treatment of osteoporosis with medications like teriparatide, a parathyroid hormone, is known to improve bone density and reduce the risk of osteoporotic vertebral fractures.... 相似文献
4.
İpek Ulu Yasemin Çekmez Şule Yıldırım Köpük Nida Özer Eser Evrim Yoğurtçuoğlu Pınar Anğın 《The journal of maternal-fetal & neonatal medicine》2019,32(15):2543-2546
Purpose: The aim of the study was to investigate whether maternal serum TSP-1 level was associated with PE.Materials and methods: In our case control study, 84 pregnant women in the third trimester were included. Forty-one of them were healthy and 43 of them were with the diagnosis of PE. The diagnosis was based on the definitions of the National High Blood Pressure Education Program working Group on High Blood Pressure in Pregnancy. Preeclamptic patients were divided into two subgroups as mild and severe. Blood pressure (BP) of pregnant women were obtained in left-side lying position using a mercury sphygmomanometer after at least 10 minutes of rest. Ten milliliters of venous blood was taken from every pregnant women and dispensed into lithium heparin and serum was obtained. Samples were stored at ?80?°C until analyzed. Serum TSP-1 level was measured using enzyme-linked immunosorbent assay (ELISA). All tests were two-tailed and p < .05 was considered to be statistically significant.Results: TSP-1 level was significantly lower in PE group than in controls (p?=?.003). Platelet counts were similar in two groups (p = .26). TSP-1 levels were significantly lower in severe PE than in mild PE cases. According to the subgroup analysis, TSP-1 level was found significantly lower in severe preeclampsia group compared to control group (p = .015).Conclusions: In light of the association between endothelial dysfunction and preeclampsia, we claim that lower levels of TSP-1 which is released mostly from endothelial cells seem to reflect disease severity in PE. Our study reveals that maternal serum TSP-1 levels decrease in pregnant women presenting with PE and TSP-1 may be a new biomarker for the detection of PE and even severity of it. Further studies especially prospective ones with greater numbers of cases are needed. 相似文献
5.
6.
7.
Marib Akanda Shilpa Kodati Alexander Melamud H. Nida Sen 《Ocular immunology and inflammation》2018,26(5):671-676
Dengue fever can cause ocular complications that may not be easily identified during a regular eye examination. A high degree of suspicion and multimodal imaging will help characterize the lesions during acute stages of the infection. 相似文献
8.
Jennifer Jolley Nida Ahmed Minh B. Luu Amanda B. Francescatti Khristi Autajay Jonathan A. Myers 《JSLS, Journal of the Society of Laparoendoscopic Surgeons》2013,17(3):385-387
Background and Objectives:
Laparoscopic adjustable gastric banding is an effective and popular bariatric surgery for weight loss in obese patients that traditionally involves up to 5 incisions. Recently, a more minimally invasive single-incision technique has been developed. In this retrospective study, we compare conventional and single-incision laparoscopic adjustable gastric banding with regard to weight loss and complication rates in a cohort of demographically similar patients.Methods:
From February 2009 to February 2010, 59 patients underwent laparoscopic adjustable gastric banding by one surgeon at an outpatient surgery center. All patients were compared by age, sex, preoperative body mass index, 30-day complication rates, and excess weight loss. Thirty-seven operations were performed by a conventional, 5-incision technique, whereas 22 patients underwent the single-incision technique. The success of these techniques was determined by comparing complication rates and average percentage excess weight loss at 6-month follow-up intervals.Results:
Patients who underwent conventional laparoscopic adjustable gastric banding had a mean age of 41.2 years and preoperative body mass index of 48.2 kg/m2 compared with 43.9 years and 40.3 kg/m2, respectively, for the single-incision patients. The mean operative time in the single-incision group was longer than that in the conventional group: 47.1 minutes versus 37.4 minutes (P = .0027). The overall percentage excess weight loss was not statistically different between the 2 groups for each follow-up period. There were no complications or deaths in either group.Conclusion:
Although patients undergoing bariatric surgery may choose the single-incision technique for cosmetic purposes, this retrospective review comparing single-incision and conventional laparoscopic adjustable gastric banding shows longer operative times with equivalent weight loss and morbidity. 相似文献9.
10.
Sattar Abida K. Shahzad Hania Masroor Taleaa Martins Russell Seth Zahid Nida Amersi Farin F. 《Annals of surgical oncology》2022,29(10):6314-6322
Annals of Surgical Oncology - Surgical site infections after breast surgery range from 1 to 16%. Both the American Society of Breast Surgeons (ASBrS) and the American Association of Plastic... 相似文献