全文获取类型
收费全文 | 141篇 |
免费 | 0篇 |
专业分类
教育 | 70篇 |
科学研究 | 61篇 |
各国文化 | 1篇 |
文化理论 | 1篇 |
信息传播 | 8篇 |
出版年
2023年 | 4篇 |
2022年 | 3篇 |
2021年 | 3篇 |
2019年 | 2篇 |
2018年 | 6篇 |
2017年 | 11篇 |
2016年 | 7篇 |
2015年 | 7篇 |
2014年 | 4篇 |
2013年 | 16篇 |
2012年 | 9篇 |
2011年 | 3篇 |
2010年 | 5篇 |
2009年 | 5篇 |
2008年 | 6篇 |
2007年 | 4篇 |
2006年 | 4篇 |
2005年 | 5篇 |
2004年 | 3篇 |
2003年 | 2篇 |
2002年 | 1篇 |
2001年 | 8篇 |
2000年 | 4篇 |
1999年 | 1篇 |
1998年 | 1篇 |
1997年 | 2篇 |
1995年 | 1篇 |
1994年 | 3篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1988年 | 1篇 |
1987年 | 2篇 |
1983年 | 1篇 |
1980年 | 1篇 |
1979年 | 2篇 |
1976年 | 1篇 |
排序方式: 共有141条查询结果,搜索用时 15 毫秒
71.
72.
Mustafa K. Gurcan Dhineth Weliwitegoda Girish Chandra 《Journal of The Franklin Institute》2012,349(1):234-259
Intersymbol interference (ISI) degrades the bit error rate (BER) performance of sequential detectors such as maximum likelihood sequence detection (MLSD) and the maximum a posteriori (MAP) algorithm due to minimum distance reduction. This paper describes a novel rotation method that can increase the minimum distance and results in significant improvement in the BER performance for binary PSK and 4QAM systems when operating over severe ISI channels. Simulation results show that this method can improve the BER performance of systems employing MLSD and MAP turbo equalization by up to 4.6 dB compared to existing approaches including known precoding schemes. 相似文献
73.
74.
Mukherjee Manjari Rajashree A. Mokal Anagha A. Malur Chandra S Choksi Meena P. Desai 《Indian journal of clinical biochemistry : IJCB》1992,7(1):41-43
Urinary iodine was estimated chemically by the kinetic method, after mineralisation of the organic iodide by alkaline ashing. The experimental conditions were optimised. The methodological modifications of an existing technique are highlighted. Urinary iodine levels were determined in 349 school children of Bombay, of whom 163 had Grade IA/IB/II goitre and the remaining 186 did not have goitre. Urinary iodine concentration (Mean±SEM) of the control (n=186) and the goitre (n=163) groups were 76.47±4.97 and 71.09±6.23 μg/g creatinine respectively. The difference in the means was statistically not significant. Urinary iodine exhibited a log-normal distribution. It is concluded that the presence of goitre in the clinically euthyroid group of children was not caused by iodine deficiency. 相似文献
75.
Pratibha Mehta Luthra Rambir Singh Ramesh Chandra 《Indian journal of clinical biochemistry : IJCB》2001,16(2):153-160
Curcuma longa commonly known as tumeric is traditionally used as a spice in Indian food. A wide range of biological activities e.g. anticancer,
antimicrobial, antiinflammatory and free radical scavenging activity of the plant suggests a logical basis for its traditional
use in foodstuff. Various phytothreapeutic uses ofCurcuma longa have been reviewed. 相似文献
76.
Objective
This study involves a reanalysis of data from a randomized controlled trial to examine whether child-parent psychotherapy (CPP), an empirically based treatment focusing on the parent-child relationship as the vehicle for child improvement, is efficacious for children who experienced multiple traumatic and stressful life events (TSEs).Methods
Participants comprised 75 preschool-aged children and their mothers referred to treatment following the child's exposure to domestic violence. Dyads were randomly assigned to CPP or to a comparison group that received monthly case management plus referrals to community services and were assessed at intake, posttest, and 6-month follow-up. Treatment effectiveness was examined by level of child TSE risk exposure (<4 risks versus 4+ TSEs).Results
For children in the 4+ risk group, those who received CPP showed significantly greater improvements in PTSD and depression symptoms, PTSD diagnosis, number of co-occurring diagnoses, and behavior problems compared to those in the comparison group. CPP children with <4 risks showed greater improvements in symptoms of PTSD than those in the comparison group. Mothers of children with 4+ TSEs in the CPP group showed greater reductions in symptoms of PTSD and depression than those randomized to the comparison condition. Analyses of 6-month follow-up data suggest improvements were maintained for the high risk group.Conclusions
The data provide evidence that CPP is effective in improving outcomes for children who experienced four or more TSEs and had positive effects for their mothers as well.Practice implications
Numerous studies show that exposure to childhood trauma and adversity has negative consequences for later physical and mental health, but few interventions have been specifically evaluated to determine their effectiveness for children who experienced multiple TSEs. The findings suggest that including the parent as an integral participant in the child's treatment may be particularly effective in the treatment of young children exposed to multiple risks. 相似文献77.
K. Taranath Shetty P. M. Naik P. R. Mahadevan 《Indian journal of clinical biochemistry : IJCB》1990,5(2):101-109
The original Bratton and Marshall method for sulfanilamide assay has been modified for differential assay of Dapsone even in the presence of other diazotisable compounds. The property of Dapsone diazo derivative to precipitate out upon its coupling with N-(1-naphthyl) ethylene diamine has been taken advantage to differentiate this sulphone from that of other diazotisable compounds. The present assay method also enables one to assay free DDS and its acid labile metabolites in biological samples even in the presence of other diazotisable compounds. The use of the organic solvent to extract the azo colour complex renders greater sensitivity and specificity for DDS assay. 相似文献
78.
Pradeep Naik S. Indira R. M. Pitchappan T. Malati 《Indian journal of clinical biochemistry : IJCB》1991,6(2):119-123
Antibodies against human leucocyte antigens (HLA) in sera from uni and multiparous women are the potential source of HLA reagent.
The present study was undertaken to screen 169 sera from pregnant women for the presence of HLA antibodies employing 26 panel
cells (Peripheral blood lymphocytes) having known HLA phenotypes. 20.7% (35/169) sera were found to be positive for HLA class-1
antibodies. Present study generated one monospecific, (r=0.6 for A32) the duospecific sera (r=0.5 for A2 B35, r=0.47 A1 DR6
and r=0.7 A28 B51), and rest multispecific sera (r=below 0.4). These positive sera will be utilized as HLA reagents in future
studies for tissue typing. 相似文献
79.
M. Chandra D. R. Maurya S. Kumar H. Basara A. Ghatak B. L. Tekwani G. Kaur M. K. Misra 《Indian journal of clinical biochemistry : IJCB》2003,18(2):150-153
Despite enormous research in the field of hypertension, its pathophysiology still remains largely unresolved and appears to
be multifactorial. In the present communication, we have analyzed the status of nitric oxide (NO) in the patients with essential
hypertension and age matched controls. We have found that the levels of NO are lowered in essential hypertension. The normalization
of blood pressure by administration of antihypertensive therapy causes rise in the NO level indicating that perturbed NO status
in essential hypertension is reversible. Addition of antioxidant to the antihypertensive drugs causes a further, though non
significant, rise in the levels of NO, suggesting that antioxidants may be combined with antihypertensive drugs as adjunct
in the management of essential hypertension. 相似文献
80.
Regulation of intracellular cholesterol homeostasis exists under balance between intracellular biosynthesis and uptake from extracellular origin by cell surface transport proteins. Expected role of cholesterol on either tumor suppressor gene and/or DNA synthesis has been aimed in the present study to explore intracellular cholesterol homeostasis in CLL subjects. Higher expressions of p53R2 (p53 dependent subunit of ribonucleotide reductase) and p53 were found in lymphocytes of chronic human lymphocytic leukemia as comparison to their normal counterparts. Inverse relation was found with p53 independent R2 subunit (in human hRRM2) of ribonucleotide reductase, which was found to be decreased from its control group. More expression of peripheral type benzodiazepine receptor, a cholesterol transporter, was noticed in isolated nuclear fraction with simultaneous increase of cholesterol concentration in cytoplasmic and nuclear compartments. A parallel increase of cholesterol in cell nucleus with increased p53R2 expression shows priority of the involvement of cholesterol in the process of cell replication. 相似文献