全文获取类型
收费全文 | 42049篇 |
免费 | 2201篇 |
国内免费 | 154篇 |
专业分类
耳鼻咽喉 | 546篇 |
儿科学 | 2657篇 |
妇产科学 | 749篇 |
基础医学 | 4991篇 |
口腔科学 | 1199篇 |
临床医学 | 3002篇 |
内科学 | 7670篇 |
皮肤病学 | 1184篇 |
神经病学 | 2445篇 |
特种医学 | 1275篇 |
外科学 | 6274篇 |
综合类 | 1394篇 |
一般理论 | 19篇 |
预防医学 | 2185篇 |
眼科学 | 1477篇 |
药学 | 4149篇 |
1篇 | |
中国医学 | 358篇 |
肿瘤学 | 2829篇 |
出版年
2023年 | 344篇 |
2022年 | 1006篇 |
2021年 | 1689篇 |
2020年 | 930篇 |
2019年 | 1028篇 |
2018年 | 1448篇 |
2017年 | 1054篇 |
2016年 | 1383篇 |
2015年 | 1403篇 |
2014年 | 2038篇 |
2013年 | 2317篇 |
2012年 | 3274篇 |
2011年 | 3185篇 |
2010年 | 1909篇 |
2009年 | 1500篇 |
2008年 | 2169篇 |
2007年 | 2196篇 |
2006年 | 2003篇 |
2005年 | 1789篇 |
2004年 | 1631篇 |
2003年 | 1376篇 |
2002年 | 1200篇 |
2001年 | 813篇 |
2000年 | 749篇 |
1999年 | 629篇 |
1998年 | 281篇 |
1997年 | 222篇 |
1996年 | 234篇 |
1995年 | 202篇 |
1994年 | 170篇 |
1993年 | 135篇 |
1992年 | 372篇 |
1991年 | 352篇 |
1990年 | 385篇 |
1989年 | 349篇 |
1988年 | 313篇 |
1987年 | 260篇 |
1986年 | 250篇 |
1985年 | 243篇 |
1984年 | 192篇 |
1983年 | 134篇 |
1982年 | 75篇 |
1981年 | 84篇 |
1980年 | 75篇 |
1979年 | 120篇 |
1978年 | 78篇 |
1977年 | 90篇 |
1976年 | 74篇 |
1973年 | 70篇 |
1971年 | 67篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Sunil Kumar Vaishali Shukla Manish Kumar Dubey Ram Sanmukh Upadhyay 《Journal of basic microbiology》2021,61(10):910-922
White mold and stem rot is a common disease of Phaseolus vulgaris caused by Sclerotinia sclerotiorum. Biological control is a promising alternative for the control of this disease. In the present study, two Trichoderma spp., T. erinaceum and T. viride, and the consortium of both were evaluated as biocontrol agents against sclerotinia stem rot disease. The results revealed that T. erinaceum (NAIMCC-F-02171) and T. viride (NAIMCC-F-02500) when applied alone, significantly suppressed the infection rate of S. sclerotiorum and increased the rate of survival of plants by 74.5%. On the contrary, the combination of both the Trichoderma spp. was found to be more effective in reducing stem rot by 57.2% and increasing the survival of plants by 87.5% when compared to the individual Trichoderma applications. Further, the exogenous supplementation of Trichoderma activated antioxidative machineries, such as peroxidase, polyphenol oxidase, superoxide dismutase, catalase, and ascorbic acid in the plant. Besides, hydrogen peroxide and superoxide-free radical accumulation were also found to be reduced when T. erinaceum and T. viride were used either individually or in combination under the pathogen-challenged condition. Additionally, the photopigments in the bioprimed plants were markedly increased. Moreover, the combined inoculation of the two isolates yielded the highest records of growth parameters (root weight, shoot length, and leaf weight) compared with individual inoculation. Therefore, based on the above results, it was concluded that the combination of T. erinaceum and T. viride can be effectively used as an alternative to control white mold and stem rot caused by S. sclerotiorum. 相似文献
992.
993.
Melissa Wasserstein Laila Arash-Kaps Antonio Barbato Renata Gallagher Roberto Giugliani Norberto Guelbert Carla Hollak Takayuki Ikezoe Robin Lachmann Olivier Lidove Paulina Mabe Eugen Mengel Maurizio Scarpa Ebubekir Senates Michel Tchan Jesus Villarrubia Yixin Chen Maria Iram Awan Monica Kumar 《Molecular genetics and metabolism》2021
994.
995.
996.
Yashwant Patidar Chandan Kumar Pal Amar Mukund Guresh Kumar Shiv Kumar Sarin 《The British journal of radiology》2021,94(1120)
Objective:Comparing the efficacy, safety and outcome of percutaneous intrervention for Budd-Chiari Syndrome (BCS) patients with bilirubin less than 3 and 3–6 mg dl−1.Methods and materials:188 BCS patients having serum bilirubin ≤6 mg dl−1 and underwent percutaneous interventions were divided into two groups based on bilirubin level: 151 patients having bilirubin <3 mg dl−1 were included in Group 1; and 37 patients having bilirubin 3–6 mg dl−1 were included in Group 2. Both group were compare for technical success (successful recanalization of hepatic venous stenosis or creation of portocaval shunt with post-procedure gradient ≤5 mm of Hg), Safety (procedure-related mortality/morbidity or patient required transplantation) and outcome (resolution of clinical symptoms and survival).Results:Technical success was 94.7% in Group 1–89.1% in Group 2 with overall success rate was 93.6%. No significant differences observed between the two groups in regards to procedure related complication. Overall transplant-free survival at 1 and 5 years after intervention in both groups was 96.3 and 91.2% respectively. 1-year and 5-year survivals in Group 1 was 96.7%, and 93.1%, whereas Group 2 was 94.6 and 90.1% with no statically significantly difference between the two groups (p = 0.59). Percutaneous intervention results are good in patients having bilirubin up to 6 mg dl−1, i.e. mild to moderate liver dysfunctions.Conclusion:Technical success, survival and outcome of percutaneous intervention in BCS patients having serum bilirubin 3–6 mg dl−1 was comparable to patients having bilirubin level <3 mg dl−1.Advances in knowledge:Percutaneous intervention treatment is suitable for treatment for symptomatic BCS patients having bilirubin up to 6 mg dl−1. 相似文献
997.
Venkata Subramanian Krishnaraju Harmandeep Singh Rajender Kumar Sarika Sharma Bhagwant Rai Mittal Anish Bhattacharya 《The British journal of radiology》2021,94(1122)
Localizing the sites of infection in the body is possible in nuclear medicine using a variety of radiopharmaceuticals that target different components of the infective and inflammatory cascade. Gamma(γ)-emitting agents such as [67Ga]gallium citrate were among the first tracers used, followed by development of positron-emitting tracers like 2-deoxy-2-[18F]fluoro-D-glucose (18F-FDG). Though these tracers are quite sensitive, they have limited specificity for infection due to their concentration in sites of non-infective inflammation. White blood cells (WBC) labelled with γ or positron emitters have higher accuracy for differentiating the infective processes from the non-infective conditions that may show positivity with tracers such as 18F-FDG. We present a pictorial review of potential clinical applications of PET/CT using 18F-FDG labelled WBC. 相似文献
998.
Matthew Seager Shankar Kumar Emma Lim Graham Munneke Steve Bandula Miles Walkden 《The British journal of radiology》2021,94(1118)
Renal cryoablation is a treatment option for early stage renal cell carcinomas with excellent oncological outcomes and low morbidity. This review outlines the technique of renal cryoablation and provides a guide for interventional radiologists on setting up an integrated service within a renal cancer network multidisciplinary setting. Patient selection and preparation, together with the technical aspects which ensure optimal oncological outcomes and avoid collateral damage to adjacent organs are highlighted. 相似文献
999.
Kaushik Prateek Patel Chetan Gulati Gurpreet S. Seth Sandeep Parakh Neeraj Randeep Guleria Kumar Rajeev Gupta Priyanka Bal Chandrasekhar 《Annals of nuclear medicine》2021,35(9):1058-1065
Annals of Nuclear Medicine - 68Ga-DOTA-NaI-octreotide (DOTANOC) is a promising new alternative to 18F-fluorodeoxyglucose (FDG) for imaging inflammation in cardiac sarcoidosis. The aim of the study... 相似文献