全文获取类型
收费全文 | 2820篇 |
免费 | 176篇 |
国内免费 | 3篇 |
专业分类
耳鼻咽喉 | 18篇 |
儿科学 | 114篇 |
妇产科学 | 123篇 |
基础医学 | 343篇 |
口腔科学 | 24篇 |
临床医学 | 568篇 |
内科学 | 400篇 |
皮肤病学 | 35篇 |
神经病学 | 295篇 |
特种医学 | 27篇 |
外科学 | 162篇 |
综合类 | 32篇 |
一般理论 | 2篇 |
预防医学 | 480篇 |
眼科学 | 17篇 |
药学 | 92篇 |
中国医学 | 10篇 |
肿瘤学 | 257篇 |
出版年
2023年 | 15篇 |
2022年 | 18篇 |
2021年 | 43篇 |
2020年 | 22篇 |
2019年 | 44篇 |
2018年 | 46篇 |
2017年 | 33篇 |
2016年 | 65篇 |
2015年 | 39篇 |
2014年 | 70篇 |
2013年 | 152篇 |
2012年 | 150篇 |
2011年 | 167篇 |
2010年 | 102篇 |
2009年 | 89篇 |
2008年 | 204篇 |
2007年 | 214篇 |
2006年 | 173篇 |
2005年 | 196篇 |
2004年 | 179篇 |
2003年 | 159篇 |
2002年 | 152篇 |
2001年 | 20篇 |
2000年 | 12篇 |
1999年 | 25篇 |
1998年 | 28篇 |
1997年 | 27篇 |
1996年 | 40篇 |
1995年 | 33篇 |
1994年 | 28篇 |
1993年 | 24篇 |
1992年 | 27篇 |
1991年 | 18篇 |
1990年 | 22篇 |
1989年 | 17篇 |
1988年 | 22篇 |
1987年 | 18篇 |
1986年 | 17篇 |
1985年 | 12篇 |
1984年 | 16篇 |
1983年 | 33篇 |
1982年 | 35篇 |
1981年 | 20篇 |
1980年 | 14篇 |
1978年 | 13篇 |
1977年 | 10篇 |
1975年 | 16篇 |
1973年 | 15篇 |
1972年 | 8篇 |
1970年 | 8篇 |
排序方式: 共有2999条查询结果,搜索用时 15 毫秒
1.
2.
Dorothy Doughty Janet Ramundo Phyllis Bonham Janice Beitz Paula Erwin-Toth Renee Anderson Bonnie Sue Rolstad 《Journal of wound, ostomy, and continence nursing》2006,33(2):125-30; quiz 131-2
Wound assessment is a key element of effective wound care, and assessment of pressure ulcers includes accurate determination of wound stage. Although the original staging system established by Shea was based on his understanding of the pathology involved in pressure ulcer development, subsequent staging systems (and the one currently in use) were intended simply to establish the level of tissue damage. Recently, clinicians have drawn attention to numerous limitations associated with the current staging system, including the inability to differentiate between an inflammatory response involving intact skin and a deep tissue injury (deep bruising) underneath intact skin. This is a clinically significant difference because clinicians have noted that most inflammatory responses resolve with intervention, whereas most areas of deep tissue injury progress to full-thickness ulcers even when appropriate intervention is provided. A second area of controversy involves partial-thickness (Stage 2) lesions; because many of these lesions are caused by maceration and/or friction (as opposed to pressure) clinicians are frequently unclear regarding which of these lesions should be staged. In response to these concerns, the National Pressure Ulcer Advisory Panel convened a consensus forum and published white papers to clearly outline the issues; they solicited clinician feedback on the white papers and the Wound, Ostomy, Continence Nurses Society provided a written response. This article summarizes the key points of the white papers, WOCN Society response, and consensus forum discussion. 相似文献
3.
It was hypothesized that members of an older cohort of seriously mentally ill community mental health clients would develop stronger alliances with intensive case managers. Eighty-six clients participating in a study of case management services completed a measure of working alliance and structured interviews. It was found that older cohort clients, those age 45 or older, showed much stronger alliances with their case managers than younger clients.This research is funded by NIMH/SAMHSA grant R18MH46082. 相似文献
4.
Differentiation of pancreatic epithelial progenitor cells into hepatocytes following transplantation into rat liver
下载免费PDF全文
![点击此处可从《Proceedings of the National Academy of Sciences of the United States of America》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Mariana D. Dabeva Seong-Gyu Hwang Srinivasa Rao G. Vasa Ethel Hurston Phyllis M. Novikoff Douglas C. Hixson Sanjeev Gupta David A. Shafritz 《Proceedings of the National Academy of Sciences of the United States of America》1997,94(14):7356-7361
The ability to identify, isolate, and transplant progenitor cells from solid tissues would greatly facilitate the treatment of diseases currently requiring whole organ transplantation. In this study, cell fractions enriched in candidate epithelial progenitor cells from the rat pancreas were isolated and transplanted into the liver of an inbred strain of Fischer rats. Using a dipeptidyl dipeptidase IV genetic marker system to follow the fate of transplanted cells in conjunction with albumin gene expression, we provide conclusive evidence that, after transplantation to the liver, epithelial progenitor cells from the pancreas differentiate into hepatocytes, express liver-specific proteins, and become fully integrated into the liver parenchymal structure. These studies demonstrate the presence of multipotent progenitor cells in the adult pancreas and establish a role for the liver microenvironment in the terminal differentiation of epithelial cells of foregut origin. They further suggest that such progenitor cells might be useful in studies of organ repopulation following acute or chronic liver injury. 相似文献
5.
Phyllis W Sharps Ayman A E El-Mohandes M Nabil El-Khorazaty Michele Kiely Tessa Walker 《Journal of perinatology》2003,23(5):414-419
OBJECTIVE: To describe breastfeeding initiation among 210 urban African-American mothers with inadequate prenatal care. METHODS: This study is a case-control study of postpartum mothers recruited from four large urban hospitals. RESULTS: Mothers who chose to breastfeed were more educated, employed before birth, married, and using contraception postnatally. Regression model analysis controlling for demographic differences revealed that breastfeeding was significantly associated with a higher perception of severity of illness and higher confidence in the ability of health care to prevent illness. Breastfeeding mothers were less likely to reverse parent-child roles and had a lower perception of hassle from their infant's behavior. When comparing mothers who breastfed longer than 8 weeks to those who did not breastfeed, breastfeeding mothers had high scores related to empathy toward infants on the Adult-Adolescent Parenting Inventory as well as a low perception of hassle on the Parenting Daily Hassle. The perception of existing formal or informal social support did not influence breastfeeding behavior. CONCLUSION: Personal attributes of low-income urban mothers such as health beliefs and parental attitudes may play a role in the initiation and duration of breastfeeding. Low-income African-American mothers may be influenced in their choice to breastfeed by supportive messages from physicians and nurses delivering care to mothers and their newborns. Emphasis should be placed on the role breastfeeding can play in preventing childhood illnesses. 相似文献
6.
Phyllis A Gordon 《Journal of Vascular Nursing》2004,22(1):2-11; quiz 12-3
Diabetes mellitus has been referred to as a vascular disease because of its effect on the vascular endothelial wall. In recent years, research has identified specific effects of hyperglycemia and insulin resistance on the vasculature of the diabetic patient. Atherosclerosis is known to develop earlier in the diabetic patient and is more aggressive due to the metabolic effects of hyperglycemia and insulin resistance. The results of many large, randomized, prospective trials have provided practice changes in the management of the patient with diabetes. Trials such as the Framingham Study identified risk factors associated with atherosclerosis. Additional studies, such as the Diabetes Control and Complications Trial and the United Kingdom Prospective Diabetes Study, provided information about risk factors for diabetes and contributed to treatment recommendations for the person with type 1 or type 2 diabetes. Results of these and many other trials continue to change the recommendations for the person with diabetes to reduce mortality and prevent coronary heart disease, blindness, renal failure, and amputation. This paper will identify the effects of diabetes on the vascular system and outline best practice recommendations on the basis of clinical trials. 相似文献
7.
Phyllis Callahan Michael H. Baumann & Jamshid Rabii 《Journal of neuroendocrinology》1996,8(10):771-776
Previous studies have shown that mu (μ) and kappa ( κ ) opioid antagonists inhibit suckling-induced prolactin release. Prolactin responses elicited by pup suckling or opioid administration are mediated, at least in part, by suppression of dopamine (DA) release from tuberoinfundibular dopaminergic (TIDA) neurons in the hypothalamus. We examined the effects of the μ opiate receptor antagonist, β -funaltrexamine ( β -FNA), and the κ opiate receptor antagonist, nor-binaltorphimine (nor-BNI) on the activity of TIDA neurons in lactating rats. TIDA neuronal activity was determined by measuring DOPA accumulation in the caudate putamen (CP) and median eminence (ME). The effects of opioid antagonist treatment were determined in pup-deprived (low circulating prolactin levels) or pup-suckled rats (high circulating prolactin levels). The accumulation of 5-hydroxytryptophan (5-HTP) in the medial preoptic area (MPOA), the anterior hypothalamus (AH) and the median eminence (ME) was quantified as an index of serotonergic activity in the same animals for comparative purposes. 相似文献
8.
Gregory S. Liptak M.D. M.P.H. David B. Shurtleff M.D. Jill W. Bloss R.P.T. Elizabeth Baltus-Hebert M.S. O.T.R. Phyllis Manitta O.T.R. 《Developmental medicine and child neurology》1992,34(9):787-796
The optimal method for providing mobility for children with myelomeningocele remains controversial. 39 children using a parapodium were compared with 29 children in wheelchairs. There were no significant differences between the two groups for medical complications, use of health-care services or activities of daily living, although there were differences in the patterns of complications. Children using the parapodium were more likely to develop lesions of the lower extremities, to have dislocated hips, to be more obese and to watch more television; children using wheelchairs were more likely to develop lesions of the gluteal region, to have knee-flexion contractures and to have fewer fecal accidents. The parapodium was judged by families to be less effective as a mobility aid; however, the upright posture it allows was considered extremely advantageous. A combined approach allowing upright posture and wheeled mobility would appear to be optimal. 相似文献
9.
Laura Emmons Patricia Callahan Phyllis Gorman Marcia Snyder 《Journal of Midwifery & Women's Health》1997,42(3):228-253
This article describes the clinical management of dermatologic disorders most commonly encountered in the primary care setting. The common presenting clinical signs and symptoms are reviewed, and the initial laboratory tests that may establish the diagnosis are recommended. Pharmacologic and nonpharmacologic treatments are reviewed. Diagnosis and management of disorders of the sebaceous and apocrine glands, disorders of the hair and pigmentation, fungal, viral, and bacterial infections, dermatitis, and infestations are discussed. A review of the care of skin burns and wounds is included as well as the diagnosis and management of urticaria. 相似文献
10.
Use of the paradigm shifts advocated by futurists and the supporters of total quality management can facilitate access to
new options for mental health systems. New views and innovative systems, however, become difficult to maintain in the context
of increasingly rapid and unexpected change occurring in the environment. One strategy that can be employed is the use of
leverage, a term usually associated with finance or politics. 相似文献