全文获取类型
收费全文 | 720篇 |
免费 | 25篇 |
国内免费 | 15篇 |
专业分类
耳鼻咽喉 | 4篇 |
儿科学 | 41篇 |
妇产科学 | 5篇 |
基础医学 | 92篇 |
口腔科学 | 9篇 |
临床医学 | 68篇 |
内科学 | 126篇 |
皮肤病学 | 4篇 |
神经病学 | 58篇 |
特种医学 | 131篇 |
外科学 | 41篇 |
综合类 | 52篇 |
一般理论 | 2篇 |
预防医学 | 51篇 |
眼科学 | 2篇 |
药学 | 15篇 |
肿瘤学 | 59篇 |
出版年
2022年 | 2篇 |
2021年 | 4篇 |
2020年 | 4篇 |
2019年 | 4篇 |
2018年 | 7篇 |
2017年 | 6篇 |
2016年 | 5篇 |
2015年 | 6篇 |
2014年 | 14篇 |
2013年 | 24篇 |
2012年 | 25篇 |
2011年 | 27篇 |
2010年 | 22篇 |
2009年 | 21篇 |
2008年 | 21篇 |
2007年 | 34篇 |
2006年 | 23篇 |
2005年 | 31篇 |
2004年 | 24篇 |
2003年 | 15篇 |
2002年 | 23篇 |
2001年 | 19篇 |
2000年 | 18篇 |
1999年 | 11篇 |
1998年 | 23篇 |
1997年 | 39篇 |
1996年 | 45篇 |
1995年 | 23篇 |
1994年 | 26篇 |
1993年 | 26篇 |
1992年 | 7篇 |
1991年 | 5篇 |
1990年 | 6篇 |
1989年 | 20篇 |
1988年 | 21篇 |
1987年 | 16篇 |
1986年 | 23篇 |
1985年 | 8篇 |
1984年 | 6篇 |
1983年 | 7篇 |
1982年 | 11篇 |
1981年 | 6篇 |
1980年 | 8篇 |
1979年 | 5篇 |
1978年 | 9篇 |
1977年 | 7篇 |
1976年 | 11篇 |
1975年 | 7篇 |
1967年 | 1篇 |
1941年 | 1篇 |
排序方式: 共有760条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
Variability of skin temperature in the waking monkey 总被引:3,自引:0,他引:3
6.
Chang HJ Batts KP Lloyd RV Sebo TJ Thompson GB Lohse CM Pankratz SV 《Endocrine pathology》2000,11(3):229-241
Nonfunctioning islet cell tumors or pancreatic endocrine tumors are the most common type of malignant islet cell tumor. Although
previously detected usually at an advanced stage because of mass effect, the early detection rate of small localized disease
has been increasing. To date it has been difficult to predict the clinical behavior in localized regional nonfunctioning tumors.
To investigate potential markers predicting malignancy and poor prognosis in nonfunctioning pancreatic endocrine tumors, we
analyzed the expression of Ki-67, topoisomerase IIα (Topollα), and p27, as well as a variety of clinicopathologic parameters
in 76 cases of nonfunctioning islet cell tumors (23 benign cases and 53 malignant cases). Ki-67, Topollα, and p27 labeling
indices were significantly different between benign and malignant tumors. Expression of Ki-67, Topollα, and p27 were associated
with survival in patients with a malignant tumor in a univariate setting. However, only p27 and Topollα were jointly associated
with survival in multivariate analysis. Immunohistochemical staining for p27, Topollα, and Ki-67 can be helpful in the diagnosis
of nonfunctioning pancreatic endocrine tumor. Analysis of p27 and Topollα may also have potential utility as prognostic factors
for malignant tumors. 相似文献
7.
8.
Rao VM; Dalinka MK; Mitchell DG; Spritzer CE; Kaplan F; August CS; Axel L; Kressel HY 《Radiology》1986,161(1):217-220
Four patients with proved osteopetrosis (three with the infantile malignant form and one with the benign form) were examined with magnetic resonance imaging at 1.5 T. All patients were studied in the coronal and sagittal planes using both short and long repetition time/echo time sequences. The infantile malignant form was characterized by a complete lack of signal from the marrow alternating with a signal intensity equivalent to that of the intervertebral disks, resulting in a "stepladder" appearance. In the benign form or after successful marrow transplantation in the infantile malignant form, intermediate or high signal intensity in the vertebrae was noted, suggesting the presence of some marrow elements. 相似文献
9.
10.
Pankratz M 《Occupational health & safety (Waco, Tex.)》1999,68(5):46-8, 50, 52 passim