全文获取类型
收费全文 | 9702篇 |
免费 | 574篇 |
国内免费 | 50篇 |
专业分类
耳鼻咽喉 | 81篇 |
儿科学 | 122篇 |
妇产科学 | 110篇 |
基础医学 | 1268篇 |
口腔科学 | 576篇 |
临床医学 | 892篇 |
内科学 | 2148篇 |
皮肤病学 | 103篇 |
神经病学 | 996篇 |
特种医学 | 269篇 |
外国民族医学 | 1篇 |
外科学 | 1837篇 |
综合类 | 29篇 |
一般理论 | 2篇 |
预防医学 | 533篇 |
眼科学 | 188篇 |
药学 | 635篇 |
中国医学 | 54篇 |
肿瘤学 | 482篇 |
出版年
2024年 | 12篇 |
2023年 | 116篇 |
2022年 | 232篇 |
2021年 | 409篇 |
2020年 | 225篇 |
2019年 | 343篇 |
2018年 | 425篇 |
2017年 | 277篇 |
2016年 | 289篇 |
2015年 | 356篇 |
2014年 | 487篇 |
2013年 | 577篇 |
2012年 | 876篇 |
2011年 | 872篇 |
2010年 | 474篇 |
2009年 | 434篇 |
2008年 | 627篇 |
2007年 | 636篇 |
2006年 | 559篇 |
2005年 | 517篇 |
2004年 | 401篇 |
2003年 | 334篇 |
2002年 | 275篇 |
2001年 | 56篇 |
2000年 | 33篇 |
1999年 | 43篇 |
1998年 | 39篇 |
1997年 | 32篇 |
1996年 | 25篇 |
1995年 | 13篇 |
1994年 | 13篇 |
1993年 | 10篇 |
1992年 | 20篇 |
1991年 | 23篇 |
1990年 | 14篇 |
1989年 | 10篇 |
1988年 | 32篇 |
1987年 | 20篇 |
1986年 | 24篇 |
1985年 | 10篇 |
1984年 | 11篇 |
1983年 | 12篇 |
1982年 | 9篇 |
1980年 | 6篇 |
1979年 | 16篇 |
1978年 | 7篇 |
1975年 | 9篇 |
1974年 | 13篇 |
1973年 | 11篇 |
1972年 | 8篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
Mir O Albiges L Arkwright S Duboc D Massault PP Tenenbaum F Touzé E Menasché P Vacher-Lavenu MC Goldwasser F Alexandre J 《Gynecologic oncology》2007,106(3):622-625
BACKGROUND: Non-bacterial thrombotic endocarditis is a severe complication of cancer, rarely reported in gynecologic tumors. However, it can be inaugural and lead to complex diagnostic pathways. CASE: A 40-year-old woman presented with a stroke, related to an endocarditis. The valvular vegetation was surgically removed, and a malignant node was resected. A PET-scan led to the diagnosis of a myometrial tumor, which was found to be a primitive neuroectodermal tumor (PNET). The patient underwent total abdominal hysterectomy with bilateral salpingo-oophorectomy, and systemic chemotherapy which allowed a complete remission of tumoral and cardio-vascular symptoms. CONCLUSION: To our knowledge, this is the first case report of a PNET of the myometrium revealed by cardio-vascular symptoms. 相似文献
82.
83.
84.
85.
Dr. Alexandre Favre 《Virchows Archiv : an international journal of pathology》1890,120(3):460-476
Ohne Zusammenfassung 相似文献
86.
Rennan Garcias Moreira Julia Maria SaraivaDuarte Alexandre Costa Pereira Martha SosaMacias Carlos GalavizHernandez Meddly Lesley Santolalla Wagner C. S. Magalhes Camila Zolini Thiago Peixoto Leal Zsolt Balzs Adrin Llerena Robert H. Gilman Jos Geraldo Mill Victor Borda Heinner Guio Timothy D. OConnor Eduardo TarazonaSantos Fernanda RodriguesSoares 《CTS Clinical and Translational Science》2022,15(6):1400
87.
David Andrew McNamee Alexandre G. Legros Daniel R. Krewski Gerald Wisenberg Frank S. Prato Alex W. Thomas 《International archives of occupational and environmental health》2009,82(8):919-933
The effects of exposure to extremely low frequency (ELF) electromagnetic fields (EMFs) on human cardiovascular parameters
remain undetermined. Epidemiological studies have utilized dosimetry estimations of employee workplace exposure using altered
heart rate variability (HRV) as predictive of certain cardiovascular pathologies. Laboratory studies have focused on macrocirculatory
indicators including heart rate, HRV and blood pressure. Few studies have been conducted on the response of the microcirculatory
system to EMF exposure. Attempts to replicate both epidemiological and laboratory studies have been mostly unsuccessful as
study design, small sample populations and confounding variables have hampered progress to date. Identification of these problems,
in the current context of international exposure guideline re-evaluation, is essential for future EMF studies. These studies
should address the possible deleterious health effects of EMFs as well as the detection and characterization of subtle physiological
changes they may induce. Recommendations for future work include investigating the macro- and microcirculatory relationship
and the use of laboratory geomagnetic shielding. 相似文献
88.
Effect of vitamin A status at the end of term pregnancy on the saturation of retinol binding protein with retinol 总被引:4,自引:0,他引:4
Sapin V Alexandre MC Chaïb S Bournazeau JA Sauvant P Borel P Jacquetin B Grolier P Lémery D Dastugue B Azaïs-Braesco V 《The American journal of clinical nutrition》2000,71(2):537-543
BACKGROUND: Vitamin A (retinol), which is required for normal fetal development and successful gestation, circulates in the blood bound to a specific protein, the retinol binding protein (RBP). Little is known about the transport and metabolism of this complex protein or about retinol status during normal human pregnancy. OBJECTIVE: The aim of this study was to assess retinol status and transport modalities of retinol in well-nourished women with normal pregnancies, a population poorly investigated compared with pathologic and malnourished pregnant women. DESIGN: The maternal blood and cord blood concentrations of retinol, vitamin E, beta-carotene, RBP, and transthyretin of pregnant French women at term (n = 27) were measured and compared with values from a nonpregnant control group (n = 27). In addition, holo-RBP (retinol bound), apo-RBP (retinol free), and total protein were assessed in both groups to enable the hemodilution occurring during pregnancy to be taken into consideration and to evaluate the extent of saturation of RBP with retinol. RESULTS: Healthy pregnant women at term had normal serum circulatory amounts of retinol, vitamin E, binding proteins, and beta-carotene. However, they had less binding of retinol to RBP (holo-RBP: 49.9% in pregnant women, 54.0% in cord blood, and 77.5% in the control group). CONCLUSION: The results of this study suggest that retinol homeostasis and transport are modified during normal human pregnancy. 相似文献
89.
Pauline S. Effting Anand Thirupathi Alexandre P. Müller Brbara C. Pereira Diane M. Sepa-Kishi Luis F. B. Marqueze Franciane T. F. Vasconcellos Renata T. Nesi Talita C. B. Pereira Luiza W. Kist Maurício R. Bogo Rolando B. Ceddia Ricardo A. Pinho 《Nutrients》2022,14(11)
This study investigates whether ladder climbing (LC), as a model of resistance exercise, can reverse whole-body and skeletal muscle deleterious metabolic and inflammatory effects of high-fat (HF) diet-induced obesity in mice. To accomplish this, Swiss mice were fed for 17 weeks either standard chow (SC) or an HF diet and then randomly assigned to remain sedentary or to undergo 8 weeks of LC training with progressive increases in resistance weight. Prior to beginning the exercise intervention, HF-fed animals displayed a 47% increase in body weight (BW) and impaired ability to clear blood glucose during an insulin tolerance test (ITT) when compared to SC animals. However, 8 weeks of LC significantly reduced BW, adipocyte size, as well as glycemia under fasting and during the ITT in HF-fed rats. LC also increased the phosphorylation of AktSer473 and AMPKThr172 and reduced tumor necrosis factor-alpha (TNF-α) and interleukin 1 beta (IL1-β) contents in the quadriceps muscles of HF-fed mice. Additionally, LC reduced the gene expression of inflammatory markers and attenuated HF-diet-induced NADPH oxidase subunit gp91phox in skeletal muscles. LC training was effective in reducing adiposity and the content of inflammatory mediators in skeletal muscle and improved whole-body glycemic control in mice fed an HF diet. 相似文献
90.
Anis Aliouat Guy Antou Vincent Rat Nicolas Pradeilles Pierre -Marie Geffroy Alexandre Maître 《Materials》2022,15(12)
Spark Plasma Sintering (SPS) has become a conventional and promising sintering method for powder consolidation. This study aims to well understand the mechanisms of densification encountered during SPS treatments, especially in the early stages of sintering. The direct current (DC) electrical behavior of copper granular medium is characterized. Their properties are correlated with their microstructural evolutions through post-mortem scanning electron microscope (SEM) observations to allow a thorough understanding of the involved Branly effect that is suspected to occur in SPS. The electrical response is studied by modifying the initial thickness of the oxide layer on particles surfaces and applying various mechanical loads on the granular medium. Without load and at low current, the measured quasi-reversible behavior is connected to the formation of spots at the microcontacts between the particles. By increasing the current, the Branly transition from an insulating to a conductive state suddenly occurs. The insulating oxide layer is destroyed, and micro-bridges are created. The application of a mechanical pressure strongly modifies the DC Branly effect. Increasing low stress leads to a strong decrease in the breakdown field. For high-applied pressure, successive drops in the electric field are detected during the electrical transition. These successive drops are induced by microcracking of the insulating oxide layer. 相似文献