全文获取类型
收费全文 | 495篇 |
免费 | 16篇 |
国内免费 | 2篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 19篇 |
妇产科学 | 1篇 |
基础医学 | 121篇 |
口腔科学 | 14篇 |
临床医学 | 53篇 |
内科学 | 112篇 |
皮肤病学 | 9篇 |
神经病学 | 13篇 |
特种医学 | 18篇 |
外科学 | 25篇 |
综合类 | 10篇 |
预防医学 | 30篇 |
眼科学 | 11篇 |
药学 | 31篇 |
中国医学 | 1篇 |
肿瘤学 | 44篇 |
出版年
2021年 | 5篇 |
2018年 | 5篇 |
2017年 | 5篇 |
2016年 | 8篇 |
2015年 | 5篇 |
2014年 | 11篇 |
2013年 | 21篇 |
2012年 | 14篇 |
2011年 | 12篇 |
2010年 | 6篇 |
2009年 | 13篇 |
2008年 | 10篇 |
2007年 | 11篇 |
2006年 | 12篇 |
2005年 | 18篇 |
2004年 | 22篇 |
2003年 | 12篇 |
2002年 | 7篇 |
2001年 | 20篇 |
2000年 | 6篇 |
1999年 | 5篇 |
1998年 | 11篇 |
1997年 | 10篇 |
1996年 | 11篇 |
1994年 | 5篇 |
1992年 | 9篇 |
1991年 | 12篇 |
1990年 | 15篇 |
1989年 | 12篇 |
1988年 | 13篇 |
1987年 | 10篇 |
1986年 | 7篇 |
1985年 | 11篇 |
1984年 | 5篇 |
1983年 | 7篇 |
1982年 | 4篇 |
1980年 | 4篇 |
1979年 | 6篇 |
1978年 | 7篇 |
1977年 | 8篇 |
1976年 | 9篇 |
1975年 | 6篇 |
1974年 | 8篇 |
1973年 | 8篇 |
1971年 | 9篇 |
1970年 | 10篇 |
1969年 | 8篇 |
1968年 | 12篇 |
1966年 | 12篇 |
1965年 | 6篇 |
排序方式: 共有513条查询结果,搜索用时 0 毫秒
1.
2.
Neuroimaging in Pineal Tumors 总被引:4,自引:0,他引:4
F Reis MD AV Faria MD PhD VA Zanardi MD PhD JR Menezes MD F Cendes MD PhD LS Queiroz MD PhD 《Journal of neuroimaging》2006,16(1):52-58
BACKGROUND AND PURPOSE: The authors report radiological findings in 11 tumors in the pineal region, which were histologically diagnosed as germinomas, pineocytomas pineoblastomas, ependymomas, teratomas, and astrocytomas. METHODS: Computed tomography (CT) was performed in seven patients and magnetic resonance imaging (MRI) was performed in all patients. RESULTS: CT showed a solid or solid/cystic mass with variable contrast enhancement. MRI showed a heterogeneous mass, with hypointense signal on T1 and iso/hyperintense signal on T2-weighted images (WI) and gadolinium enhancement. Extension to adjacent structures occurred in five patients and spread through the cerebral spinal fluid (CSF) in two. CONCLUSIONS: Pineal region tumors have no pathognomonic imaging pattern. MRI and CT are complementary in diagnosis and are important to determine localization, extension, and meningeal spread. 相似文献
3.
4.
5.
V. S. Shklyaev V. I. Pantsurkin V. N. Ryazanov V. V. Gorbunova A. A. Sukhanov N. I. Vakhrina A. P. Moroz A. P. Ivanova 《Pharmaceutical Chemistry Journal》1992,26(4):338-343
Translated from Khimiko-farmatsevtieheskii Zhurnal, Vol. 26, No. 4, pp. 51–55, April, 1992. 相似文献
6.
N N Trapeznikov V A Gorbunova L A Er?mina P A Siniukov E E Kovalevski? 《Voprosy onkologii》1987,33(7):65-74
The effectiveness of cis-diammine-dichloroplatinum (cisplatinum, platidiam, DDP) alone or as a component of combined treatment was evaluated in 85 patients with osteogenic sarcoma. The said drugs were used as adjuvants following radical surgery (group I-18 cases), in combined treatment of solitary and single lung metastases (group 2-7 cases) and in 60 patients with advanced tumors (group 3). An analysis of long-term results showed response in 30.8% in group 3. In group 2, application of chemotherapy plus surgery was followed by remissions of 2-46+-month duration (mean-13.9 months). In group I, 78.7% are expected to survive metastasis-free more than 12 months. Toxicity was moderate, with nausea and vomiting (87.1%), myelosuppression (52.8%), nephrotoxicity (48.6%) and alopecia (75.7%) being the most common side-effects. 相似文献
7.
One kidney was removed from male rats weighing 500–850 g; the remaining kidney underwent compensatory hypertrophy and, after 1–2 months, it was larger (index of hypertrophy 70–92%) in rats weighing 700–850 g than in animals weighing 500–600 g (56–58%). Histological investigation showed that this marked hypertrophy of the solitary kidney in old rats was not the result of disease of the organ, for pathological changes such as are sometimes found in intact and hypertrophied kidneys were found in only 38 of 223 animals. The results suggest that the ability of the kidneys to undergo, compensation and regeneration is not reduced in old age.Laboratory of Growth and Development, Institute of Human Morphology, Academy of Medical Sciences of the USSR, Moscow. (Presented by Academician of the Academy of Medical Sciences of the USSR A. P. Avtsyn.) Translated from Byulleten' Éksperimental'noi Biologii i Meditsiny, Vol. 84, No. 9, pp. 362–366, September, 1977. 相似文献
8.
9.
Is the outcome of in-vitro fertilization and embryo transfer treatment improved by spontaneous or surgical drainage of a hydrosalpinx? 总被引:4,自引:7,他引:4
Sowter MC; Akande VA; Williams JA; Hull MG 《Human reproduction (Oxford, England)》1997,12(10):2147-2150
A pilot study was designed to examine whether the outcome of embryo
transfer in women with a hydrosalpinx might be improved by surgical
drainage of the hydrosalpinx at the time of oocyte collection for in- vitro
fertilization treatment. A comparative, controlled but retrospective
analysis of the results was performed of all women with infective tubal
damage aged <40 years old, who had ovulatory cycles, a normal uterus and
a partner with normal spermatozoa. A standardized treatment regimen was
used. A maximum of three embryos were transferred. Hydrosalpinx was defined
by prior hysterosalpingography and/or laparoscopy with transcervical dye
injection. A total of 237 embryo transfer cycles in women with
hydrosalpinges (tubal distension not visible in 151, visible but not
drained in 30 and drained in 56) were compared with 705 embryo transfer
cycles in women with tubal disease but no hydrosalpinx. Results were
analysed in the first three cycles but also separately in the first cycle
to check for bias. Success rates were higher in the first cycle, but did
not significantly influence overall differences. Implantation rates were
significantly reduced overall in the hydrosalpinx group (8.0 versus 13.2%
for controls; P < 0.001), being 8.3% (P < 0.01) in the subgroup
without evident tubal distension and 7.5% (not significant) in the drained
hydrosalpinx group. This study shows that tubal damage with distal
occlusion is associated with a marked reduction in embryo implantation,
even in the absence of obvious fluid distension. Surgical drainage of
distended hydrosalpinges appears to offer no benefit.
相似文献
10.
目的对十年前后精神分裂症患者用药情况的变化进行调查分析.方法对十年前后两个五年段的各500份符合精神分裂症诊断标准的病历进行回顾性调查,并对各项指标进行对比分析.结果两组折算用药剂量经t检验差异无显著性(P>0.05);两组合并用药、合并抗胆碱药及疗效经χ2检验差异有显著性(P<0.01);十年后非典型抗精神病药物氯氮平在临床上的应用比例明显增大并上升为首位.结论十年前后两组抗精神病药的应用发生了明显变化,疗效好、副作用轻的非典型抗精神病药的应用比例明显增加. 相似文献