全文获取类型
收费全文 | 2774篇 |
免费 | 218篇 |
国内免费 | 21篇 |
专业分类
耳鼻咽喉 | 20篇 |
儿科学 | 112篇 |
妇产科学 | 111篇 |
基础医学 | 292篇 |
口腔科学 | 123篇 |
临床医学 | 315篇 |
内科学 | 528篇 |
皮肤病学 | 65篇 |
神经病学 | 165篇 |
特种医学 | 53篇 |
外国民族医学 | 1篇 |
外科学 | 394篇 |
综合类 | 61篇 |
现状与发展 | 1篇 |
一般理论 | 1篇 |
预防医学 | 226篇 |
眼科学 | 57篇 |
药学 | 263篇 |
1篇 | |
中国医学 | 44篇 |
肿瘤学 | 180篇 |
出版年
2024年 | 9篇 |
2023年 | 51篇 |
2022年 | 145篇 |
2021年 | 185篇 |
2020年 | 133篇 |
2019年 | 159篇 |
2018年 | 214篇 |
2017年 | 145篇 |
2016年 | 136篇 |
2015年 | 125篇 |
2014年 | 144篇 |
2013年 | 201篇 |
2012年 | 262篇 |
2011年 | 213篇 |
2010年 | 135篇 |
2009年 | 88篇 |
2008年 | 114篇 |
2007年 | 131篇 |
2006年 | 87篇 |
2005年 | 65篇 |
2004年 | 50篇 |
2003年 | 37篇 |
2002年 | 35篇 |
2001年 | 17篇 |
2000年 | 16篇 |
1999年 | 22篇 |
1998年 | 4篇 |
1997年 | 13篇 |
1996年 | 7篇 |
1995年 | 3篇 |
1994年 | 2篇 |
1993年 | 3篇 |
1992年 | 11篇 |
1991年 | 6篇 |
1990年 | 5篇 |
1989年 | 7篇 |
1988年 | 4篇 |
1987年 | 6篇 |
1986年 | 5篇 |
1985年 | 6篇 |
1984年 | 2篇 |
1981年 | 1篇 |
1980年 | 2篇 |
1975年 | 1篇 |
1973年 | 1篇 |
1972年 | 2篇 |
1970年 | 2篇 |
1968年 | 1篇 |
排序方式: 共有3013条查询结果,搜索用时 15 毫秒
31.
Fatemeh Beiraghdar Yunes Panahi Behzad Einollahi Eghlim Nemati Amirhossein Sahebkar Arash Hassanzadeh Hamid T. Khosroshahi Sima A. Azar Javid Safa Sadroddin R. Hashemi Jalal Etemadi Eisa T. Marzony Hamid Noshad 《Saudi Pharmaceutical Journal》2015,23(5):544-548
Background: The efficacy of human recombinant erythropoietins (rHuEPOs) in the treatment of anemia with different etiologies is proven. Development of biosimilar rHuEPO products with lower cost and wider availability is important for the care of anemic patients. Objective: The aim of the present study was to determine the bioequivalence and safety of a biosimilar rHuEPO (Pastopoitin®) and compare it with the innovator product Eprex®, as a standard rHuEPO. Methods: One hundred and seven anemic patients on stable hemodialysis were recruited to this randomized double-blind comparative trial and assigned to either subcutaneous Pastopoitin (n = 50) or Eprex (n = 57). Each study group received rHuEPO at a dose of 80–120 IU/kg/week in 2–3 divided doses for a period of 3 months. Hematologic parameters including Hemoglobin, hematocrit, RBC, EBC, platelet, MCV, MCH and MCHC were checked every 2 weeks. Blood iron, ferritin, TIBC, creatinine, BUN and electrolytes (Na, K, Ca and P) were evaluated monthly over the 3 months. Results: A significant increase in hemoglobin, hematocrit and RBC was observed by the end of study in both Pastopoitin and Eprex groups (p < 0.001). However, these factors were not significantly different between the groups, neither at baseline nor at the end of study (p > 0.05). Likewise, the groups were comparable regarding MCV, MCH, MCHC, iron, ferritin, TIBC, creatinine, BUN and electrolytes at baseline as well as at the end of trial. Adverse events were not serious and occurred with the same frequency in the study groups. Conclusion: Pastopoitin showed comparable efficacy and safety profile with Eprex in anemic patients on hemodialysis. Hence, Pastopoitin may be considered as a rHuEPO with a lower cost and wider availability compared with the innovator product Eprex. 相似文献
32.
Reem J. Al Argan Safi G. Alqatari Abir H. Al Said Raed M. Alsulaiman Abdulsalam Noor Lameyaa A. Al Sheekh Fedaa H. Al Beladi 《Medicine》2021,100(19)
Introduction:Corona virus disease-2019 (COVID-19) presents primarily with respiratory symptoms. However, extra respiratory manifestations are being frequently recognized including gastrointestinal involvement. The most common gastrointestinal symptoms are nausea, vomiting, diarrhoea and abdominal pain. Gastrointestinal perforation in association with COVID-19 is rarely reported in the literature.Patient concerns and diagnosis:In this series, we are reporting 3 cases with different presentations of gastrointestinal perforation in the setting of COVID-19. Two patients were admitted with critical COVID-19 pneumonia, both required intensive care, intubation and mechanical ventilation. The first one was an elderly gentleman who had difficult weaning from mechanical ventilation and required tracheostomy. During his stay in intensive care unit, he developed Candidemia without clear source. After transfer to the ward, he developed lower gastrointestinal bleeding and found by imaging to have sealed perforated cecal mass with radiological signs of peritonitis. The second one was an obese young gentleman who was found incidentally to have air under diaphragm. Computed tomography showed severe pneumoperitoneum with cecal and gastric wall perforation. The third case was an elderly gentleman who presented with severe COVID-19 pneumonia along with symptoms and signs of acute abdomen who was confirmed by imaging to have sigmoid diverticulitis with perforation and abscess collection.Interventions:The first 2 cases were treated conservatively. The third one was treated surgically.Outcome:Our cases had a variable hospital course but fortunately all were discharged in a good clinical condition.Conclusion:Our aim from this series is to highlight this fatal complication to clinicians in order to enrich our understanding of this pandemic and as a result improve patients’ outcome. 相似文献
33.
Hassan Malekinejad Soheyl Varasteh Fatemeh Rahmani Hadi Cheraghi Arash Alizadeh Mehdi Behfar 《Toxin reviews》2015,34(2):101-108
This study was conducted to clarify the role of efflux transporter MRP2 in acetaminophen-induced hepatotoxicity in cats. Sixteen mixed bred male cats and four liver samples from mixed breed male dogs were used. The cats were assigned into four groups (n?=?4), received saline and 2, 10 and 50?mg/kg doses of acetaminophen orally for 14 days. Unlike the intact dogs, the MRP2 was not detectable in control cats. MRP2 at mRNA level was expressed in the liver of cats, which received the medium and high doses. Data suggest that the MRP2 expression may involve in the acetaminophen-induced hepatotoxicity in cats. 相似文献
34.
Mehdi Esfandyari-Manesh Seyed Hossein Mostafavi Reza Faridi Majidi Mona Noori Koopaei Nazanin Shabani Ravari Mohsen Amini Behrad Darvishi Seyed Nasser Ostad Fatemeh Atyabi Rassoul Dinarvand 《Daru : journal of Faculty of Pharmacy, Tehran University of Medical Sciences》2015,23(1)
Background
Nanoparticles (NPs) play an important role in anticancer delivery systems. Surface modified NPs with hydrophilic polymers such as human serum albumin (HSA) have long half-life in the blood circulation system.Methods
The method of modified nanoprecipitation was utilized for encapsulation of paclitaxel (PTX) in poly (lactic-co-glycolic acid) (PLGA). Para-maleimide benzoic hydrazide was conjugated to PLGA for the surface modifications of PLGA NPs, and then HSA was attached on the surface of prepared NPs by maleimide attachment to thiol groups (cysteines) of albumin. The application of HSA provides for the longer blood circulation of stealth NPs due to their escape from reticuloendothelial system (RES). Then the physicochemical properties of NPs like surface morphology, size, zeta potential, and in-vitro drug release were analyzed.Results
The particle size of NPs ranged from 170 to 190 nm and increased about 20–30 nm after HSA conjugation. The zeta potential was about -6 mV and it decreased further after HSA conjugation. The HSA conjugation in prepared NPs was proved by Fourier transform infrared (FT-IR) spectroscopy, faster degradation of HSA in Differential scanning calorimetry (DSC) characterization, and other evidences such as the increasing in size and the decreasing in zeta potential. The PTX released in a biphasic mode for all colloidal suspensions. A sustained release profile for approximately 33 days was detected after a burst effect of the loaded drug. The in vitro cytotoxicity evaluation also indicated that the HSA NPs are more cytotoxic than plain NPs.Conclusions
HSA decoration of PLGA NPs may be a suitable method for longer blood circulation of NPs. 相似文献35.
36.
Jadidi Nilofar Alesaeidi Samira Arab Fatemeh Pakzad Bahram Siasi Elham Esmaeilzadeh Emran 《Clinical rheumatology》2022,41(11):3487-3494
Clinical Rheumatology - MiRSNPs may interfere with mRNA stability through effects on microRNAs (miRNAs)-mRNA interactions via direct changes in miRNA binding site or effect on the secondary... 相似文献
37.
Akbari Mohammadarian Eshghyar Fatemeh Gholipour Mahdi Eslami Solat Hussen Bashdar Mahmud Taheri Mohammad Omrani Mir Davood Ghafouri-Fard Soudeh 《Metabolic brain disease》2022,37(6):2061-2066
Metabolic Brain Disease - mTOR has been shown to be involved in the regulation of immune responses and differentiation of immune cells. This protein is a candidate molecule for unraveling the... 相似文献
38.
Mohammad Amin Fallahzadeh Sophia T. Abdehou Jafar Hassanzadeh Fatemeh Fallhzadeh Mohammad Hossein Fallahzadeh Leila Malekmakan 《Indian Journal of Critical Care Medicine》2015,19(6):311-315
Introduction:
Causes of death are different and very important for policy makers in different regions. This study was designed to analyze the data for our in-patient children mortality.Materials and Methods:
In this cross-sectional study from March 2011 to March 2013, all patients from 2 months to 18 years who died in pediatric intensive care unit, emergency room or medical pediatric wards in the teaching hospitals were studied.Results:
From a total of 18,915 admissions during a 2-year-period, 256 deaths occurred with a mean age of 4.3 ± 5 years and mortality 1.35%. An underlying disease was present in 70.7% of the patients and in 88.5% of them the leading causes of death were related to the underlying diseases. The most common underlying diseases were congenital heart disease and cardiomyopathy in 50 (27.6%). The four main causes of deaths were sepsis (14.8%), pneumonia (14.5%), congestive heart failure (9.8%), and hepatic encephalopathy (9.8%).Conclusion:
We may conclude that after sepsis and pneumonia, congestive heart failure, and hepatic encephalopathy are the leading causes of death. Most patients who died had underlying diseases including malignancies, heart and liver diseases as the most common causes. 相似文献39.
Parsa Yousefichaijan Ali Cyrus Fatemeh Dorreh Mohammad Rafeie Mojtaba Sharafkhah Faryar Frohar Fatemeh Safi 《Iranian journal of pediatrics.》2015,25(6)
Background:
Nephrolithiasis in children is associated with a high rate of complications and recurrence.Objectives:
Since some evidences reported that zinc has an important place amongst inhibitors of crystallization and crystal growth, we decided to assess the effectiveness of oral zinc sulfate as adjuvant treatment in children with nephrolithiasis.Patients and Methods:
This was a randomized, double-blind, placebo-controlled clinical trial. 102 children in the age range 1 month to 11 years with first nephrolithiasis were recruited. Patients were randomly divided into two equal groups (intervention and control groups). Intervention group received conservative measures for stones and 1 mg/kg/day (maximum 20 mg/day) oral zinc sulfate syrup for 3 months. Control group received placebo in addition to conservative measures, also for 3 months. Patients were followed up by ultrasonography for 9 months, in 5 steps (at the end of 1st, 2nd, 3rd, 6th and 9th month after treatment) assessing size and number of stones in the kidneys.Results:
Only at the end of the first month, the average number (intervention: 1.15 ± 3.78, control: 1.3 ± 2.84) (P = 0.001) and size (cm) (intervention: 0.51 ± 1.76, control: 0.62 ± 1.39) (P = 0.001) of stones was significantly lower in the intervention group, and in other points there was no significant therapeutic efficacy in oral zinc adjuvant treatment compared to conservative treatment alone. Also, during the 9-month follow-up, the number and size of stones in both groups decreased significantly (both: P < 0.0001) in a way that the decrease in the intervention group showed no difference with the control group.Conclusions:
Adjuvant treatment with zinc is not more effective than consecutive treatment in children with nephrolithiasis. However, further studies are recommended due to the lack of clinical evidence in this field. 相似文献40.
Parisa Aghasi Arya Setoodeh Azadeh Sayarifard Maryam Rashidiyan Fatemeh Sayarifard Ali Rabbani Javad Mahmoudi-Gharaei 《Iranian journal of pediatrics.》2015,25(6)