全文获取类型
收费全文 | 1453篇 |
免费 | 67篇 |
国内免费 | 151篇 |
专业分类
耳鼻咽喉 | 3篇 |
儿科学 | 59篇 |
妇产科学 | 11篇 |
基础医学 | 135篇 |
口腔科学 | 28篇 |
临床医学 | 190篇 |
内科学 | 329篇 |
皮肤病学 | 48篇 |
神经病学 | 39篇 |
特种医学 | 341篇 |
外科学 | 70篇 |
综合类 | 24篇 |
预防医学 | 45篇 |
眼科学 | 21篇 |
药学 | 162篇 |
1篇 | |
中国医学 | 5篇 |
肿瘤学 | 160篇 |
出版年
2024年 | 1篇 |
2023年 | 7篇 |
2022年 | 4篇 |
2021年 | 21篇 |
2020年 | 17篇 |
2019年 | 15篇 |
2018年 | 24篇 |
2017年 | 23篇 |
2016年 | 21篇 |
2015年 | 29篇 |
2014年 | 52篇 |
2013年 | 52篇 |
2012年 | 63篇 |
2011年 | 55篇 |
2010年 | 52篇 |
2009年 | 52篇 |
2008年 | 50篇 |
2007年 | 137篇 |
2006年 | 53篇 |
2005年 | 50篇 |
2004年 | 21篇 |
2003年 | 12篇 |
2002年 | 28篇 |
2001年 | 35篇 |
2000年 | 15篇 |
1999年 | 26篇 |
1998年 | 78篇 |
1997年 | 77篇 |
1996年 | 71篇 |
1995年 | 63篇 |
1994年 | 43篇 |
1993年 | 52篇 |
1992年 | 9篇 |
1991年 | 17篇 |
1990年 | 12篇 |
1989年 | 55篇 |
1988年 | 31篇 |
1987年 | 33篇 |
1986年 | 27篇 |
1985年 | 23篇 |
1984年 | 21篇 |
1983年 | 14篇 |
1982年 | 29篇 |
1981年 | 15篇 |
1980年 | 18篇 |
1979年 | 7篇 |
1978年 | 4篇 |
1977年 | 16篇 |
1976年 | 28篇 |
1975年 | 13篇 |
排序方式: 共有1671条查询结果,搜索用时 15 毫秒
81.
Histidinaemia is a relatively common inherited metabolic disorder with an incidence similar to phenylketonuria. This paper reports the long term outcome of patients diagnosed by newborn screening in the north west of England. Between 1966 and 1990, 108 infants were diagnosed as having histidinaemia by a regional neonatal screening programme (incidence 1:11,083). A further five children were detected following diagnosis in a sibling. Of the 113, nine were lost to follow up. Infants diagnosed before 1981 (n = 47) were placed on a low histidine diet (225 mg/kg/d) for an average period of 21 months (SD 4.5). All patients were reviewed regularly, Griffiths developmental quotients (DQ) were assessed at 2 and 4 years, and WISC-R intelligence quotients (IQ) at 8, 12, and 18 years. IQ data were converted to standard deviation scores (IQ SDS) to account for increasing IQ norms with time. Neither DQ nor IQ correlated with plasma histidine at diagnosis or with the mean plasma histidine throughout life. Growth was normal in all patients. There was no apparent benefit from a low histidine diet in early childhood. In contrast to other studies, there was no excess of clinical symptoms. On the basis of these findings, histidinaemia is a benign metabolic disorder that does not require treatment. 相似文献
82.
83.
84.
Lingual thyroid gland: sonographic appearance 总被引:1,自引:0,他引:1
Thyroid dysgenesis is often manifested by a lingual or sublingual location of the thyroid gland. If radionuclide studies are not readily available or are contraindicated, ultrasound (US) may be used to locate the gland. The US appearance of a lingual thyroid gland and the role of US in the evaluation of suspected thyroid dysgenesis are described. 相似文献
85.
HPLC测定益肤霜中红霉素和地塞米松的含量 总被引:5,自引:0,他引:5
采用HPLC测定益肤霜中红霉素和地塞米松的含量,控制制剂的质量。色谱条件:固定相为Kromasil C18柱;流动相为乙腈-0.2mol/L醋酸铵-水,流速0.8ml/min;检测波长215nm。以c对峰面积A作直线回归,红霉素在1.5-24g/L地塞米松在20-300mg/L的范围内,其浓度与峰面积呈直线关系。红霉素回收率为99.69%;地塞米松的回收率为100.28%。本法操作简便,结果准确, 相似文献
86.
87.
Concepts necessary to an understanding of the basics of quality assurance audits are presented. Included are specific examples that bridged theory and practice by applying the protocol to a real-life diagnostic imaging situation. This method meets the present requirements of the Joint Commission of the Accrediation of Hospitals. 相似文献
88.
89.
90.
Park MJ Park YH Ahn HJ Choi W Paik KH Kim JM Chang YH Ryoo BY Yang SH 《Leukemia & lymphoma》2005,46(8):1183-1188
According to several reports, the 10 year incidence of secondary acute myelogenous leukemia (AML) or myelodysplastic syndrome (MDS) after systemic chemotherapy is approximately 1.5%. The cumulative risk increases by 0.25 - 1% for the first 8 years after treatment. We have reported only 6 cases of hematological malignancies (0.3%) after breast cancer chemotherapy in our institute. We detected 2 cases of secondary AML and 1 case of MDS, 19, 52 and 12 months, respectively, after systemic chemotherapy for breast cancer. Published data on the occurrence of secondary hematological malignancies other than AML or MDS in this setting are scarce. We encountered diffuse large B-cell lymphoma, angioimmunoblastic lymphoma and mantle cell lymphoma as secondary hematological malignancies after systemic chemotherapy for breast cancer. 相似文献