全文获取类型
收费全文 | 579篇 |
免费 | 45篇 |
专业分类
耳鼻咽喉 | 8篇 |
儿科学 | 35篇 |
妇产科学 | 14篇 |
基础医学 | 89篇 |
口腔科学 | 6篇 |
临床医学 | 40篇 |
内科学 | 96篇 |
皮肤病学 | 50篇 |
神经病学 | 14篇 |
特种医学 | 5篇 |
外科学 | 42篇 |
综合类 | 11篇 |
一般理论 | 2篇 |
预防医学 | 39篇 |
眼科学 | 3篇 |
药学 | 39篇 |
中国医学 | 2篇 |
肿瘤学 | 129篇 |
出版年
2023年 | 3篇 |
2022年 | 16篇 |
2021年 | 23篇 |
2020年 | 16篇 |
2019年 | 28篇 |
2018年 | 42篇 |
2017年 | 26篇 |
2016年 | 19篇 |
2015年 | 15篇 |
2014年 | 22篇 |
2013年 | 27篇 |
2012年 | 49篇 |
2011年 | 47篇 |
2010年 | 36篇 |
2009年 | 16篇 |
2008年 | 34篇 |
2007年 | 30篇 |
2006年 | 35篇 |
2005年 | 30篇 |
2004年 | 21篇 |
2003年 | 24篇 |
2002年 | 16篇 |
2001年 | 7篇 |
2000年 | 1篇 |
1999年 | 2篇 |
1998年 | 2篇 |
1997年 | 1篇 |
1996年 | 2篇 |
1994年 | 2篇 |
1993年 | 2篇 |
1992年 | 3篇 |
1990年 | 5篇 |
1989年 | 4篇 |
1988年 | 6篇 |
1987年 | 3篇 |
1986年 | 4篇 |
1985年 | 3篇 |
1982年 | 1篇 |
1978年 | 1篇 |
排序方式: 共有624条查询结果,搜索用时 15 毫秒
91.
Priya M. D'Costa Rukma S. S. Kunkolienkar Arti G. Naik Ravidas K. Naik Rajdeep Roy 《Journal of basic microbiology》2019,59(10):979-991
This study investigates the effect of metals (cadmium, lead, mercury, and tellurium) and organic pollutants (benzene, diesel, lindane, and xylene) on a dinoflagellate—Prorocentrum sigmoides Böhm—and its associated culturable bacteria. Two bacterial cultures (Bacillus subtilis strain PD005 and B. xiamensis strain PD006) were isolated from P. sigmoides and characterized by scanning electron microscopy, 16S ribosomal RNA sequencing, biochemical analyses, and growth curve studies. This study points to a mutualistic relationship between P. sigmoides and its associated Bacillus isolates. P. sigmoides enhanced the growth of its associated Bacillus spp., through the secretion of extracellular exudates. In return, both Bacillus isolates contributed to the resistance of P. sigmoides to metals and organic pollutants. P. sigmoides and both Bacillus isolates exhibited concentration‐dependent responses to metals and organic pollutants. An intriguing feature was the similar response of P. sigmoides and its associated Bacillus isolates to mercury and cadmium, indicating a co‐selection of mercury and cadmium resistance. This provides support to the “dinoflagellate host‐phycosphere bacteria” behaving as a single functional unit. However, the sensitivity profiles of P. sigmoides and its associated Bacillus isolates are different with respect to metals versus organic pollutants. These aspects need to be addressed in future studies to unravel the effect of metal and organic pollutants on dinoflagellates, an important component of the phytoplankton community, and to discern the influence of associated “phycosphere” bacteria on the response of dinoflagellates to pollutants. 相似文献
92.
Jaap J. A. J. van der Velden Michel van Geel Ruud G. L. Nellen Marcel F. Jonkman John A. McGrath Arti Nanda Eli Sprecher Maurice A. M. van Steensel W. H. Irwin McLean Andrew J. Cassidy 《Experimental dermatology》2015,24(4):285-289
Acral peeling skin syndrome (APSS, MIM #609796) is a rare autosomal recessive disorder characterized by superficial exfoliation and blistering of the volar and dorsal aspects of hands and feet. The level of separation is at the junction of the stratum granulosum and stratum corneum. APSS is caused by mutations in the TGM5 gene encoding transglutaminase‐5, which is important for structural integrity of the outermost epidermal layers. The majority of patients originate from Europe and carry a p.(Gly113Cys) mutation in TGM5. In this study, we report both European and non‐European families carrying other mutations in the TGM5 gene. In 5 patients, we found 3 novel mutations: c.1001+2_1001+3del, c.1171G>A and c.1498C>T. To confirm their pathogenicity, we performed functional analyses with a transglutaminase activity assay, determined alternative splicing by reverse‐transcribed PCR analysis and used databases and in silico prediction tools. 相似文献
93.
Ashwin Shinde Richard Li Jae Kim Ravi Salgia Arti Hurria Arya Amini 《Seminars in oncology》2018,45(4):210-219
Early-stage non-small cell lung cancer (NSCLC) is on the rise due to the implementation of screening guidelines for patients at risk for developing lung cancer. It is anticipated that as the US population continues to age, there will be a higher percentage of medically inoperable early-stage lung cancer patients. For this reason, noninvasive ablative therapies are necessary. Stereotactic body radiation therapy (SBRT) is an effective modality in addressing early-stage NSCLC. SBRT consists of high-dose radiation delivered over 3–5 treatments. Several randomized trials comparing surgery to SBRT in early-stage operable patients have unfortunately closed early due to poor accrual. However, a recent pooled analysis from 2 randomized trials (StereoTActic Radiotherapy and Radiosurgery Or Surgery for operable Early-stage non–small cell Lung cancer) comparing surgery to SBRT did show comparable local control and overall survival rates between surgery and SBRT, offering a very effective, noninvasive modality for older adult patients with early-stage NSCLC. In this review, we summarize the role of SBRT in early-stage NSCLC, in particularly applied to the older adult population. 相似文献
94.
Josephine L. Feliciano Jennifer G. Le-Rademacher Ajeet Gajra Martin J. Edelman Tyler Zemla Ryan McMurray Hongbin Chen Arti Hurria Hyman Muss Harvey J. Cohen Rogerio Lilenbaum Aminah Jatoi 《Journal of Geriatric Oncology》2018,9(5):501-506
Objective
This study sought to define the role of first-line platinum-based doublet chemotherapy in older patients with non-small cell lung cancer (NSCLC).Materials and Methods
We analyzed three first-line NSCLC trials: CALGB 9730, CALGB 30203, and CALGB 30801, which tested carboplatin and paclitaxel; carboplatin and gemcitabine; and carboplatin with either pemetrexed or gemcitabine, respectively. Overall survival was the primary endpoint. Age-based comparisons with a cutpoint of 65?years were performed with Cox proportional hazards models with adjustments for sex, tumor histology, cancer stage, chemotherapy, and smoking history and after stratifying by performance score. Secondary endpoints were grade 3–5 adverse events, chemotherapy cycles completed, and whether toxicity prompted chemotherapy discontinuation.Results
730 patients were included; 337 (46%) were 65+ years of age. No statistically significant difference in survival was observed for older (≥65) versus younger patients (HR?=?1.096; 95% CI?=?(0.94, 1.28); p?=?0.25). A trend emerged with increased odds of a grade 3–5 adverse event for patients ≥65?years versus <65?years (OR?=?1.52; 95% CI?=?(0.99, 2.31); p?=?0.05). The proportion of completed chemotherapy cycles was marginally lower in older patients (difference?=??5%; 95% CI?=?(?9, 0.2); p?=?0.06) for those ≥65?years versus <65?years, but no statistically significant difference occurred in the rate of chemotherapy discontinuation for toxicity (OR?=?1.4; 95% CI?=?(0.85, 2.19); p?=?0.21) for patients ≥65?years versus <65?years. A cutpoint of 70?years yielded similar results.Conclusion
These findings support carboplatin doublet-based chemotherapy in select older patients with advanced NSCLC. 相似文献95.
Vicki A. Morrison Linda McCall Hyman B. Muss Aminah Jatoi Harvey J. Cohen Constance T. Cirrincione Jennifer A. Ligibel Jacqueline M. Lafky Arti Hurria 《Journal of Geriatric Oncology》2018,9(3):228-234
Objective
Actual weight-based (AWB) chemotherapy dosing is recommended for obese patients in the 2012 ASCO Clinical Practice Guideline. CALGB 49907, which utilized ABW-based adjuvant chemotherapy dosing, was a phase 3 trial in women age ≥ 65 years with early stage breast cancer, providing the opportunity to examine impact of such dosing on toxicities and outcome in older patients with breast cancer.Materials and Methods
Adverse event data were available for 615 of 633 enrolled patients. Objectives were to assess grade ≥ 3 hematologic/non-hematologic toxicities by treatment arm, age, study entry BSA/BMI, and relapse-free (RFS) and overall survival (OS) by BSA/BMI.Results
The 615 patients were sub-grouped by BSA (quartiles) and standard BMI categories, with BMI underweight/normal weight categories combined. Overall, grade ≥ 3 non-hematologic and hematologic toxicities occurred in 39.8% and 28.3% of patients, respectively. There were no significant differences in grade ≥ 3 toxicities among BSA quartiles. However, more grade ≥ 3 hematologic toxicities occurred in the underweight/normal weight BMI subgroup compared to overweight/obese subgroups (p = 0.048). Type of chemotherapy and age had no impact on toxicity occurrence by BSA/BMI categories. RFS was superior in the 25th–50th BSA percentile patients in univariate analysis (p = 0.042), as was OS in both univariate and multivariate analyses (p = 0.007, p = 0.009, respectively). No differences in RFS or OS were found by BMI categories.Conclusion
Obesity was not correlated with adverse relapse or survival outcome, and grade ≥ 3 toxicities were not greater with ABW-based dosing. This supports safety and efficacy of ABW-based dosing as per the 2012 ASCO clinical practice guideline.ClinicalTrials.gov Identifier: NCT00024102 (49907). 相似文献96.
97.
Morgana Mongraw-Chaffin Alka M. Kanaya Namratha R. Kandula Arti Shah Cheryl A. M. Anderson 《Ethnicity & health》2017,22(6):565-574
Objective: Few studies examine the relationships between anthropometry and the body composition measures they approximate, or whether they differ by sex, and no studies have examined these relationships in South Asians living in the US.Design: We conducted a cross-sectional study of 871 participants in the Mediators of Atherosclerosis in South Asians Living in America (MASALA) Study who had BMI?40?kg/m2 and underwent abdominal CT scans for measurement of visceral and subcutaneous fat. Linear regression was used to model the associations between anthropometric measures and naturally log-transformed body composition measures.Results: All measures of anthropometry, except height, were significantly associated with visceral fat and had a significant non-linear component (p?.05). The only associations for visceral fat that exhibited significant heterogeneity by sex were waist circumference (% difference in visceral fat slope: women 1.92, men 2.74, p?=?.007 for interaction) and waist-to-hip ratio (women 25.9, men 717.4, p?.001). Except for height, all measures of anthropometry were significantly associated with subcutaneous fat, had a significant quadratic component, and significant heterogeneity by sex (weight (kg): 2.74 for women, 4.08 for men; BMI (kg/m2): 10.3, 14.0; waist circumference (cm): 1.51, 3.36; hip circumference (cm): 2.53, 4.50) with p?.001 for each.Conclusions: In MASALA participants, the relationships of anthropometric measures with visceral and subcutaneous fat appear similar to other race/ethnic groups, but with weaker non-linearity and heterogeneity by sex. Given these results, researchers should consider separate models by sex for US South Asians when approximating subcutaneous fat or when using waist circumference to approximate visceral fat. 相似文献
98.
The antimicrobial activity of alcoholic, butanolic and chloroform extracts of leaves and roots of the plant Acanthus ilicifolius ware studied. Ampicillin and clotrimazole were used as standard antibacterial and antifungal agents respectively. The result of the study revealed that the alcoholic extract and chloroform extract of leaves exhibited strong inhibitory action against Bacillus subtilis, Staphylococcus aureus, Candida albicans, Aspergillus fumigatus and Aspergillus niger and moderate inhibitory action against Pseudomonas aeruginosa and Proteus vulgaris. The rest of the extracts showed moderate activity. 相似文献
99.
Amy J. Clippinger Arti Ahluwalia David Allen James C. Bonner Warren Casey Vincent Castranova Raymond M. David Sabina Halappanavar Jon A. Hotchkiss Annie M. Jarabek Monika Maier William Polk Barbara Rothen-Rutishauser Christie M. Sayes Phil Sayre Monita Sharma Vicki Stone 《Archives of toxicology》2016,90(7):1769-1783