全文获取类型
收费全文 | 1971篇 |
免费 | 117篇 |
国内免费 | 2篇 |
专业分类
耳鼻咽喉 | 15篇 |
儿科学 | 178篇 |
妇产科学 | 52篇 |
基础医学 | 205篇 |
口腔科学 | 75篇 |
临床医学 | 128篇 |
内科学 | 313篇 |
皮肤病学 | 42篇 |
神经病学 | 91篇 |
特种医学 | 95篇 |
外科学 | 413篇 |
综合类 | 41篇 |
预防医学 | 109篇 |
眼科学 | 64篇 |
药学 | 122篇 |
中国医学 | 14篇 |
肿瘤学 | 133篇 |
出版年
2023年 | 14篇 |
2022年 | 39篇 |
2021年 | 56篇 |
2020年 | 43篇 |
2019年 | 55篇 |
2018年 | 75篇 |
2017年 | 61篇 |
2016年 | 70篇 |
2015年 | 45篇 |
2014年 | 140篇 |
2013年 | 130篇 |
2012年 | 197篇 |
2011年 | 188篇 |
2010年 | 106篇 |
2009年 | 69篇 |
2008年 | 94篇 |
2007年 | 108篇 |
2006年 | 82篇 |
2005年 | 79篇 |
2004年 | 68篇 |
2003年 | 55篇 |
2002年 | 52篇 |
2001年 | 26篇 |
2000年 | 25篇 |
1999年 | 13篇 |
1998年 | 17篇 |
1997年 | 7篇 |
1996年 | 8篇 |
1995年 | 5篇 |
1994年 | 5篇 |
1993年 | 3篇 |
1992年 | 12篇 |
1991年 | 6篇 |
1990年 | 14篇 |
1989年 | 10篇 |
1988年 | 15篇 |
1987年 | 6篇 |
1986年 | 4篇 |
1985年 | 3篇 |
1983年 | 4篇 |
1980年 | 3篇 |
1979年 | 3篇 |
1977年 | 3篇 |
1974年 | 7篇 |
1973年 | 5篇 |
1972年 | 9篇 |
1970年 | 8篇 |
1969年 | 8篇 |
1967年 | 8篇 |
1966年 | 7篇 |
排序方式: 共有2090条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
M S Bhatia P K Singhal V Rastogi N K Dhar V R Nigam S B Taneja 《Journal of the Indian Medical Association》1991,89(5):137-139
Twenty-four cases of trichotillomania attending psychiatry outpatient department and child guidance clinic at Kalawati Saran Children's and Smt Sucheta Kriplani Hospitals over a period of 2 years from July, 1985 to November 1987 were studied. Females (66.7%) outnumbered the males (33.3%). Majority of cases belonged to age group 6-10 years (54.2%) and nuclear family (68.5%). Nail-biting (25.0%) was the commonest associated neurotic trait, followed by enuresis (20.9%), temper-tantrum (12.5%), etc. A past history of hysterical fits and neurotic depression was found in 3 cases (12.5%) and 2 cases (8.3%) respectively. Family history of neurosis was seen in mothers and fathers of 20.9% and 12.5% cases respectively. Trichobezoars and trichophytobezoars were found in 6 cases (25.0%) and 3 cases (12.5%) respectively. Majority of patients of trichobezoars presented with vague complaints like heaviness in the stomach (55.6%), inability to gain weight (44.4%), etc, while 22.2% cases were asymptomatic and detected only on screening. 相似文献
5.
Dara M Cannon Masanori Ichise Denise Rollis Jacqueline M Klaver Shilpa K Gandhi Dennis S Charney Husseini K Manji Wayne C Drevets 《Neuropsychopharmacology》2007,62(8):870-877
BACKGROUND: Altered serotonergic function is thought to play a role in the pathophysiology of major depressive episodes based upon evidence from neuroimaging, pharmacological, postmortem and genetic studies. It remains unclear, however, whether depressed samples that differ with respect to having shown a unipolar versus a bipolar illness course also would show distinct patterns of abnormalities within the serotonergic system. The current study compared serotonin transporter (5-HTT) binding between unipolar-depressives (MDD), bipolar-depressives (BD) and healthy-controls (HC) to assess whether the abnormalities in 5-HTT binding recently found in depressed subjects with BD extend to depressed subjects with MDD. METHODS: The 5-HTT binding-potential (BP) measured using positron emission tomography (PET) and [(11)C]DASB was compared between unmedicated, depressed subjects with MDD (n = 18) or BD (n = 18) and HC (n = 34). RESULTS: Relative to the healthy group both MDD and BD groups showed significantly increased 5-HTT BP in the thalamus (24%, 14%, respectively), insula (15%) and striatum (12%). The unipolar-depressives had elevated 5-HTT BP relative to both BD and HC groups in the vicinity of the periaqueductal gray (PAG, 20%, 22%, respectively). The bipolar-depressives had reduced 5-HTT BP relative to both HC and MDD groups in the vicinity of the pontine raphe nuclei. Depression-severity correlated negatively with 5-HTT BP in the thalamus in MDD-subjects. CONCLUSIONS: The depressed phases of MDD and BD both were associated with elevated 5-HTT binding in the insula, thalamus and striatum, but showed distinct abnormalities in the brainstem. The latter findings conceivably could underlie differences in the patterns of illness symptoms and pharmacological sensitivity observed between MDD and BD. 相似文献
6.
Isha Tyagi H. C. Taneja 《Indian journal of otolaryngology and head and neck surgery》1997,49(1):51-53
A 50-year old male presented with swollen right eyelids, bleeding per nostrils and a vague left post-auricular swelling for 4 months. Posterior rhinoscopy revealed one pinkish polypoidal mass in the posterior nare and roof of nasopharynx. FNAC from the post-auricular swelling suggested metastatic undifferentiated carcinoma. Incisional biopsy was done form the nasopharynx and histopathological examination proved it to be a malignant paraganglioma. The case is reported for its rarity. 相似文献
7.
8.
The Indian population can be divided broadly into Dravidians and the Aryans. In this report, we have attempted to analyze the HLA genetic profile of 400 native North Indian Hindus of Aryan descent. The gene frequencies of a majority of class I and II antigens show similarity to the Caucasoid population. An interesting finding was a complete lack of antigen B14 while B16 and B41 occurred with the least frequency. Haplotype A10, B8 with significant positive linkage disequilibrium as well as showing the highest incidence is characteristic of North Indians. 相似文献
9.
Occurrence of lymphocytotoxins in multi-case rheumatoid arthritis families: relation to HLA.
下载免费PDF全文
![点击此处可从《Clinical and experimental immunology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
V Taneja N K Mehra R R Singh C Anand A N Malaviya 《Clinical and experimental immunology》1991,86(1):87-91
The presence of lymphocytotoxic antibodies (LCA) and their association with HLA haplotypes has been studied in 27 multi-case rheumatoid arthritis (RA) families (13 multiplex and 14 simplex) in Northern India. Of the total 59 RA patients, 69.4% had cytotoxins in their sera as compared with 2.5% of healthy controls. No differences were observed in the frequency of LCA in relation to sex and rheumatoid factor. LCA against B cells were significantly more predominant than those against T cells. Twenty families studied for correlation of HLA with LCA showed greater intensity of reaction with DR4+ haplotypes, particularly in simplex families. Similarly, the frequency of LCA among patients and unaffected parents was greater in simplex compared with multiplex families. Haplotype sharing with the patient was increased in the relatives positive for cytotoxins in these families. An immunogenetic contribution made by the affected parent and a common environmental stimulus may be responsible for the increased production of LCA in multi-case families with RA. 相似文献
10.