全文获取类型
收费全文 | 3909篇 |
免费 | 226篇 |
国内免费 | 9篇 |
专业分类
耳鼻咽喉 | 33篇 |
儿科学 | 190篇 |
妇产科学 | 85篇 |
基础医学 | 518篇 |
口腔科学 | 31篇 |
临床医学 | 270篇 |
内科学 | 782篇 |
皮肤病学 | 64篇 |
神经病学 | 247篇 |
特种医学 | 102篇 |
外科学 | 413篇 |
综合类 | 234篇 |
一般理论 | 5篇 |
预防医学 | 333篇 |
眼科学 | 89篇 |
药学 | 322篇 |
中国医学 | 72篇 |
肿瘤学 | 354篇 |
出版年
2023年 | 27篇 |
2022年 | 61篇 |
2021年 | 120篇 |
2020年 | 56篇 |
2019年 | 70篇 |
2018年 | 79篇 |
2017年 | 74篇 |
2016年 | 89篇 |
2015年 | 99篇 |
2014年 | 125篇 |
2013年 | 172篇 |
2012年 | 260篇 |
2011年 | 244篇 |
2010年 | 155篇 |
2009年 | 126篇 |
2008年 | 180篇 |
2007年 | 196篇 |
2006年 | 176篇 |
2005年 | 171篇 |
2004年 | 156篇 |
2003年 | 162篇 |
2002年 | 117篇 |
2001年 | 100篇 |
2000年 | 94篇 |
1999年 | 76篇 |
1998年 | 32篇 |
1997年 | 25篇 |
1996年 | 26篇 |
1994年 | 22篇 |
1993年 | 21篇 |
1992年 | 64篇 |
1991年 | 57篇 |
1990年 | 48篇 |
1989年 | 45篇 |
1988年 | 45篇 |
1987年 | 31篇 |
1986年 | 44篇 |
1985年 | 41篇 |
1984年 | 22篇 |
1983年 | 25篇 |
1979年 | 29篇 |
1977年 | 20篇 |
1976年 | 18篇 |
1975年 | 22篇 |
1974年 | 20篇 |
1973年 | 31篇 |
1972年 | 36篇 |
1971年 | 23篇 |
1970年 | 27篇 |
1968年 | 26篇 |
排序方式: 共有4144条查询结果,搜索用时 0 毫秒
1.
Drishty Satpati Ketaki Bapat Archana Mukherjee Sharmila Banerjee Kanchan Kothari Meera Venkatesh 《Applied radiation and isotopes》2006,64(8):888-892
Studies on the development of imaging agents for targeting neuroreceptors is an area of considerable interest owing to the limited availability of specific as well as selective radiolabeled agents. Therefore, with an aim of developing a receptor-specific agent, iminodiacetic acid (IDA) derivative of 5-hydroxy tryptamine viz., HTIDA has been synthesized. HTIDA could be radiolabeled with the synthon [(99m)Tc(CO)(3)(H(2)O)(3)](+) in >98% yield. The biodistribution studies in normal Swiss mice showed that the (99m)Tc(CO)(3)-HTIDA crosses the blood-brain barrier successfully with a brain uptake of 0.5%ID/g at 5min post injection. The other relevant observations from biodistribution studies included no significant uptake in any other organ and fast clearance from blood, lungs and liver. 相似文献
2.
Kamalesh Das Gouranga Prosad Mondal Ashok Kumar Dutta Bijoy Mukherjee Bansi Badan Mukherjee 《Journal of clinical neuroscience》2007,14(1):12-16
Awareness among the general population of the risk factors and warning symptoms of stroke is essential for preventative purposes and for immediate effective treatment. The aim of the present study was to assess the awareness, among the general population and stroke survivors, of the risk factors and warning symptoms of stroke, to develop an educational strategy for its prevention and immediate effective treatment. Six hundred and sixty stroke patients (370 male, 290 female) and 4000 people from the general population who accompanied the patients (2800 male, 1200 female) were interviewed, using three sets of questionnaires, on the risk factors and warning symptoms of stroke. Poor knowledge or awareness of the risk factors and warning symptoms of stroke was found in both groups. Both groups suggested educational programs for stroke using printed information, audiovisual programs and community survey programs using simple and understandable information for the prevention and immediate effective treatment of stroke. Poor awareness of stroke contributes to a delay in the arrival of patients in hospital emergency departments for immediate effective treatment. Multifaceted programs regarding stroke, including printed information, audiovisual programs and stroke service programs, are advocated by both patients and the general population to improve stoke treatment and prevention. 相似文献
3.
4.
Short term effect of diltiazem on portal hypertension in patients with non-cirrhotic portal fibrosis
S Banerjee S S Banerjee S Chakraborty P Mukherjee 《Indian journal of gastroenterology》1991,10(1):7-9
Fourteen patients of non-cirrhotic portal fibrosis (NCPF) with portal hypertension were put on oral diltiazem hydrochloride (90 mg/day) or placebo on a prospective, randomised, single blind basis for 15 days. Predrug hemodynamic and biochemical status were similar in both groups. Diltiazem produced significant reduction (p less than 0.001) in mean intrasplenic pressure: from 41.88 (SD +/- 6.18) to 21.5 (+/- 7.91) cm of normal saline as against 45.56 (+/- 9.45) to 43.33 (+/- 8.27) in the placebo group. Mean arterial pressure (MAP), heart rate and cardiac output (CO) did not change in either group. Thus, the calcium channel blocker diltiazem reduces portal pressure in patients with NCPF, independent of reduction in MAP and CO; this is advantageous in situations where compromised cardiac hemodynamics may prove deleterious. 相似文献
5.
6.
7.
OBJECTIVE: The authors tested the hypothesis that neuroleptic-induced extrapyramidal syndromes are associated with painful sensations objectively conforming to the characteristics of primary sensory symptoms as reported in idiopathic and postencephalitic parkinsonism. METHOD: The frequency of subjective painful sensory symptoms and their relation to neuroleptic-induced extrapyramidal syndromes were examined in a consecutive series of 107 psychiatric patients newly admitted to acute care units at a teaching hospital. Patients without illnesses or conditions likely to be associated with pain were included in the study if they had a diagnosis other than organic mental syndromes and were receiving psychotropic medications as prescribed by their treating physicians. Structured interviews with a modified version of the McGill Pain Questionnaire to assess sensory complaints and neurological examinations for neuroleptic-induced extrapyramidal syndromes (parkinsonism and akathisia) were conducted independently by two raters blind to each other's findings and patients' medication status. RESULTS: Fourteen (23%) of 60 patients receiving neuroleptics reported experiences of spontaneous pain subjectively attributed to pharmacological treatment, compared with only one (2%) of 47 patients receiving psychotropic medications other than neuroleptics. There was no difference between these two groups in subjective complaints of paresthesia (8% versus 9%). Twelve (55%) of the 22 patients with neuroleptic-induced extrapyramidal syndromes reported pain, compared with only two (5%) of the 38 patients who received neuroleptics but did not experience extrapyramidal syndromes. CONCLUSIONS: Although consonant with the study hypothesis, these results should be regarded as preliminary and interpreted conservatively in the light of the methodological limitations of the study. 相似文献
8.
Peter R. Martin Sondra Levin Giovanni Impeduglia Yoomi Choe John Karanian Anil B. Mukherjee 《Psychopharmacology》1989,97(2):253-256
To determine whether prenatal thiamine deficiency, a frequent concomitant of alcoholism, reduces the response to ethanol during adulthood in the rat as does ethanol exposure in utero (Abel et al. 1981), pregnant Sprague-Dawley rats received either control or thiamine deficient diets together with daily injections of the thiamine antagonist pyrithiamine. At 7 months of age, male offspring were exposed to precisely regulated ethanol vapor concentrations in an inhalation chamber for 24 h and blood ethanol concentrations (BECs) and ethanol-induced intoxication were determined. Prenatally thiamine deficient rats and controls were indistinguishable in terms of appearance, body and liver weights, and the ratios of liver to body weight and brain to liver weight. However, total body water was significantly greater, and BECs and behavioral impairment were decreased, in the experimental rats. These findings indicate that prenatal thiamine deprivation is associated with reduced pharmacologic effect of ethanol as a result of increases in its volume of distribution and rate of metabolism. 相似文献
9.
Observation on serum prolactin in hepatic cirrhosis. 总被引:1,自引:0,他引:1
Serum prolactin assays in patients of hepatic cirrhosis were analysed. Patients with cirrhosis had higher values of serum prolactin (27.2 +/- 5.1 ng/ml in males and 38.4 +/- 4.1 ng/ml in females) as compared to control subjects (p less than 0.05). Majority of patients of cirrhosis with suspected portal-systemic encephalopathy had significantly higher serum prolactin than those without encephalopathy (p less than 0.05). Significantly higher values of serum prolactin on admission had positive correlation with mortality (p less than 0.01). Clinico-biochemical severity of hepatic dysfunction was directly correlated with level of serum prolactin. The present study reveals the possibility of diagnostic and prognostic values of serum prolactin in cirrhosis, specially in clinical/sub-clinical subsets of portal-systemic encephalopathy. 相似文献
10.
P Chaturvedi U C Chaturvedi R Mukherjee 《International journal of experimental pathology》1992,73(6):773-782
The helper T cells (TH) generated in dengue type 2 virus (DV) infection of mice produce a soluble helper cytokine (HF) which enhances the clonal expansion of DV-specific IgM antibody plaque forming cells (PFC). The present study was undertaken to investigate the mechanism of transmission of the helper signal from TH and HF to B cells. It was observed that TH could transmit the helper signal to B cells by direct cell to cell contact, but HF could not do so without the presence of live macrophages (M phi). HF was adsorbed by both heat killed and live M phi but the former could not transmit it to B cells. Both the polypeptide chains of HF bind to M phi. HF remains on the surface of M phi and can be retrieved completely by contact with B cells for 40 min. The helper signal from TH or HF-adsorbed M phi could not be transmitted to B cells when they were separated from each other by a cell impermeable membrane. The enhancement of PFC count is greater when the signal is transmitted by HF-adsorbed M phi as compared to that by TH alone. Thus, even with lower frequency of TH a significant number of B cells may be triggered with the help of HF and M phi. The findings thus show that the DV-specific helper signal could be transmitted only by a close physical contact of the plasma membranes of the signal presenting cells (TH or HF-adsorbed M phi) and B cells. 相似文献