全文获取类型
收费全文 | 1087篇 |
免费 | 56篇 |
国内免费 | 21篇 |
专业分类
耳鼻咽喉 | 90篇 |
儿科学 | 52篇 |
妇产科学 | 6篇 |
基础医学 | 131篇 |
口腔科学 | 26篇 |
临床医学 | 97篇 |
内科学 | 222篇 |
皮肤病学 | 37篇 |
神经病学 | 84篇 |
特种医学 | 140篇 |
外科学 | 103篇 |
综合类 | 12篇 |
预防医学 | 40篇 |
眼科学 | 1篇 |
药学 | 48篇 |
肿瘤学 | 75篇 |
出版年
2023年 | 5篇 |
2022年 | 6篇 |
2021年 | 23篇 |
2020年 | 14篇 |
2019年 | 18篇 |
2018年 | 21篇 |
2017年 | 12篇 |
2016年 | 19篇 |
2015年 | 21篇 |
2014年 | 29篇 |
2013年 | 33篇 |
2012年 | 30篇 |
2011年 | 30篇 |
2010年 | 47篇 |
2009年 | 54篇 |
2008年 | 43篇 |
2007年 | 61篇 |
2006年 | 42篇 |
2005年 | 47篇 |
2004年 | 45篇 |
2003年 | 22篇 |
2002年 | 33篇 |
2001年 | 24篇 |
2000年 | 22篇 |
1999年 | 40篇 |
1998年 | 40篇 |
1997年 | 39篇 |
1996年 | 38篇 |
1995年 | 32篇 |
1994年 | 17篇 |
1993年 | 24篇 |
1992年 | 10篇 |
1991年 | 11篇 |
1990年 | 18篇 |
1989年 | 17篇 |
1988年 | 26篇 |
1987年 | 20篇 |
1986年 | 18篇 |
1985年 | 19篇 |
1984年 | 12篇 |
1983年 | 9篇 |
1982年 | 13篇 |
1981年 | 6篇 |
1980年 | 9篇 |
1978年 | 8篇 |
1977年 | 6篇 |
1976年 | 10篇 |
1975年 | 6篇 |
1972年 | 2篇 |
1970年 | 2篇 |
排序方式: 共有1164条查询结果,搜索用时 15 毫秒
1.
Anna Maria Lavezzi Giulia Ottaviani Lorella Terni Luigi Matturri 《International journal of developmental neuroscience》2006,24(6):365-371
The aim of this study was to investigate the histological and biological features of the human cerebellar cortex development and differentiation. We analyzed 52 brains of fetal and infant death victims, aged from 17 gestational weeks to 12th postnatal month. In particular, in the cerebellar cortex at different ages we evaluated, besides the structural aspects, the expression of several biomarkers implicated in proliferative processes (c-fos, PCNA and apoptosis). We observed morphological patterns progressively evolving every month, from the indefinite structure of the second gestational trimester to the four-layered structure (external granular layer, molecular layer, Purkinje cell layer, internal granular layer) of the late fetal cortex and subsequently to the three-layered postnatal definitive morphology, due to involution of the external granular layer. The evaluation of the biological features of the cerebellar cortex showed high proliferative activity mainly confined to the transient external granular layer in prenatal life, and high apoptotic index after birth. Thus, the histological examination, better with the support of biomarker investigations, allows with accuracy to describe the dynamic sequence of steps that occur in human cerebellar cortex development and to establish in each case the age, namely the pre- or postnatal month of life. Consequently, we can diagnose delayed or altered processes of differentiation during the development of the human cerebellar cortex. 相似文献
2.
3.
4.
5.
6.
Kinnison ML; Perler BA; Kaufman SL; Mitchell SE; Kadir S; Williams GM; White RI Jr 《Radiology》1986,160(3):727-730
In situ saphenous vein grafts are being used with increasing frequency for bypass procedures involving the femoral and popliteal arteries. Complications of these procedures include anastomotic stenoses and persistent arteriovenous fistulae that may result in failure of the graft. Balloon angioplasty and embolotherapy with detachable balloons were employed successfully in three or four recent cases of patients with complications from in situ grafts. Tailored angiography is essential for evaluating in situ grafts, and interventional techniques are extremely useful for managing complications. 相似文献
7.
Polycystic kidney disease is an autosomal dominant disease that may be associated with cystic disease of the liver. In women, the cysts may develop early and be more troublesome than in men. Cystadenocarcinoma of the pancreas is uncommon, comprising 1% of primary pancreatic malignancies. This case report is the first to describe a familial association between polycystic kidney disease and cystadenocarcinoma of the pancreas and liver in the English medical literature. A patient with autosomal dominant polycystic kidney disease (ADPKD) and multiple hepatic cysts developed cystadenocarcinoma of the pancreas with multiple malignant liver cysts. The patient's mother, sister, and niece had ADPKD, and the patient's sister also died of pancreatic cystadenocarcinoma. We believe that the development of these two disease entities in which the primary pathology is cyst formation has a genetic association. (Gastroenterology 1997 Jun;112(6):2104-7) 相似文献
8.
Pheochromocytoma and paraganglioma: comparison of MR imaging with CT and I-131 MIBG scintigraphy 总被引:6,自引:0,他引:6
To ascertain the magnetic resonance (MR) imaging characteristics of pheochromocytomas and paragangliomas and to compare MR with computed tomography (CT) and iodine-131 metaiodobenzylguanidine (I-131 MIBG), 19 patients (18 with pheochromocytomas, one with a paraganglioma) were studied. The 18 patients with pheochromocytomas had had positive findings with I-131 MIBG scintigraphy. Abdominal pheochromocytomas were generally hypointense compared with normal liver on T1-weighted MR images and extremely hyperintense on T2-weighted MR images. MR imaging was preferable to CT in the evaluation of primary pheochromocytomas due to superior tissue characterization, particularly in the patient with hypertension and borderline catecholamine levels. For patients with recurrent or metastatic disease, the data suggest that I-131 MIBG scintigraphy is the examination of choice. 相似文献
9.
Evaluation of a new enzyme-linked immunosorbent assay test for rotavirus antigen in faeces 总被引:6,自引:0,他引:6
下载免费PDF全文
![点击此处可从《Journal of clinical pathology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
A new commercial test for the diagnosis of rotavirus gastroenteritis was assessed. With some modifications it compared favourably with electron microscopy and immunofluorescence. 相似文献
10.