全文获取类型
收费全文 | 16511篇 |
免费 | 1894篇 |
国内免费 | 101篇 |
专业分类
耳鼻咽喉 | 229篇 |
儿科学 | 335篇 |
妇产科学 | 125篇 |
基础医学 | 1184篇 |
口腔科学 | 7060篇 |
临床医学 | 1001篇 |
内科学 | 2523篇 |
皮肤病学 | 294篇 |
神经病学 | 843篇 |
特种医学 | 494篇 |
外科学 | 2102篇 |
综合类 | 19篇 |
一般理论 | 1篇 |
预防医学 | 598篇 |
眼科学 | 97篇 |
药学 | 520篇 |
中国医学 | 15篇 |
肿瘤学 | 1066篇 |
出版年
2024年 | 43篇 |
2023年 | 462篇 |
2022年 | 229篇 |
2021年 | 460篇 |
2020年 | 309篇 |
2019年 | 347篇 |
2018年 | 622篇 |
2017年 | 585篇 |
2016年 | 623篇 |
2015年 | 735篇 |
2014年 | 837篇 |
2013年 | 904篇 |
2012年 | 896篇 |
2011年 | 970篇 |
2010年 | 779篇 |
2009年 | 932篇 |
2008年 | 840篇 |
2007年 | 791篇 |
2006年 | 753篇 |
2005年 | 706篇 |
2004年 | 643篇 |
2003年 | 646篇 |
2002年 | 516篇 |
2001年 | 348篇 |
2000年 | 296篇 |
1999年 | 296篇 |
1998年 | 305篇 |
1997年 | 272篇 |
1996年 | 252篇 |
1995年 | 221篇 |
1994年 | 207篇 |
1993年 | 165篇 |
1992年 | 201篇 |
1991年 | 135篇 |
1990年 | 137篇 |
1989年 | 97篇 |
1988年 | 127篇 |
1987年 | 115篇 |
1986年 | 71篇 |
1985年 | 88篇 |
1984年 | 80篇 |
1983年 | 83篇 |
1982年 | 69篇 |
1981年 | 41篇 |
1979年 | 22篇 |
1977年 | 28篇 |
1975年 | 29篇 |
1974年 | 25篇 |
1973年 | 22篇 |
1972年 | 24篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
Fibroblast subpopulations in intra-oral wound healing 总被引:3,自引:0,他引:3
Hugo E. Van Beurden MSc ; Patricia A.M. Snoek BAC ; Johannes W. Von Den Hoff PhD ; Ruurd Torensma PhD ; Anne-Marie Kuijpers-Jagtman DDS PhD 《Wound repair and regeneration》2003,11(1):55-63
The objective of this study was to characterize fibroblasts at sequential time points during intra-oral wound healing in the rat. Experimental wounds were made at several time points in the mucoperiosteum of the palate of 35-day-old Wistar rats. Fibroblasts were cultured from the biopsies under standard conditions for the same number of passages. The expression of the integrin subunits alpha 1, alpha 6, and beta 1; and the intermediate filaments alpha-smooth muscle actin and vimentin were analyzed by flow cytometry. Western blot analysis was performed at 0, 8, and 60 days postwounding to confirm the expression of both intermediate filaments. The phenotypic profiles of fibroblasts cultured from subsequent stages in the wound healing process differed considerably. We conclude that distinct fibroblast phenotypes can be isolated from different stages in wound healing. These phenotypes remained stable during in vitro culturing. In addition, cryosections of the wound areas were made at identical time points and were immunohistochemically stained for the same antigens. The immunohistochemical staining correlated well to the flow-cytometric data. These results suggest the occurrence of multiple subpopulations of fibroblasts with a specialized function during wound healing. We hypothesize that undesirable consequences of wound healing might be prevented through the modulation of specific fibroblast subpopulations. 相似文献
63.
64.
65.
66.
Gregg H. Gilbert DDS Laurence G. Branch PhD Jeffrey Longmate PhD 《Journal of public health dentistry》1992,52(5):277-287
Veterans who were eligible for dental care in Department of Veterans Affairs (VA) facilities at no monetary cost responded to a mailed questionnaire. Seventy-one percent were aware that they were actually eligible for VA dental care. However, only 48 percent reported the VA as their only or primary source of dental care. Eligibility status, perceived quality of VA dental care, use of VA medical care, perception that one's income meets expenses, and perceived need for dental care were significant correlates of using the VA as one's current source of dental care. Level of formal education, perception that one's income meets expenses, transportation pattern, geographic distance from a VA facility, and eligibility status were significant correlates of using the VA as one's current medical care source. Research on VA utilization offers the opportunity to study issues of access to, and use of, a large public health care system whose patients largely receive care at no monetary cost. Veterans' use of VA dental and medical care is apparently influenced by a wide variety of factors, ranging from barriers to access to non-VA systems, to characteristics of the VA delivery system itself, to need for treatment. 相似文献
67.
68.
69.
Complications of lymphangiomas in children. 总被引:8,自引:0,他引:8
B J Hancock D St-Vil F I Luks M Di Lorenzo H Blanchard 《Journal of pediatric surgery》1992,27(2):220-4; discussion 224-6
One hundred ninety-three cases of lymphangioma presenting in children were reviewed over a 10-year period. The diagnosis was established before 5 years of age in 87.0%. The distribution of lymphangiomas was: cervical (31.4%), craniofacial (18.9%), extremity (18.9%), trunk (9.2%), intraabdominal (9.2%), cervicoaxillothoracic (4.9%), multiple (3.8%), cervicomediastinal (2.2%), and intrathoracic (1.6%). Of 164 patients undergoing primary therapy, total excision was performed in 77.4% and partial excision in 20.7% with recurrence rates of 11.8% and 52.9%, respectively. Thirty-eight percent of all operations for lymphangiomas were performed for resection of recurrent or residual disease. The incidence of postoperative complications was 31.3%. Forty-four additional procedures were required to manage these complications. Sclerotherapy with 50% dextrose was used as an adjunct in 9.5%. Recurrences were seen after total resection in 17.6% of operations in which 50% dextrose was used and 11.8% in which it was not used. Seroma formation was noted in 3.5% of total resections and 40.0% of resections for recurrent disease in which adjunctive sclerotherapy with 50% dextrose was used. Seromas occurred in 9.8% of wounds in which local drains were used and 3.6% of wounds in which drains were not used. Infectious complications occurred after 6.6% of operations using perioperative antibiotics and 3.5% not using antibiotics. The management of lymphangiomas in children remains a difficult problem. Despite being benign lesions, lymphangiomas are attended by a high rate of morbidity from complications of the disease and its management. Complete excision still offers the best chance for complete cure. Sclerotherapy with 50% dextrose is not beneficial in the management of recurrent disease or postoperative seromas. Local drains and perioperative antibiotics do not appear to diminish the incidence of seromas and infectious complications, respectively. 相似文献
70.
This paper reviews orthodontic care in patients who are in non-traditional categories. Specific orthodontic management of a patient who had severe hemophilia, seropositivity for anti-HIV Ab, and Hepatitis B surface antigen is reviewed. The Importance of defining acceptable treatment goals in these patients is of paramount Importance. 相似文献