首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   115篇
  免费   1篇
化学工业   11篇
金属工艺   1篇
机械仪表   1篇
建筑科学   6篇
能源动力   1篇
轻工业   5篇
水利工程   3篇
无线电   6篇
一般工业技术   16篇
冶金工业   51篇
原子能技术   5篇
自动化技术   10篇
  2022年   2篇
  2021年   1篇
  2020年   1篇
  2019年   1篇
  2017年   2篇
  2016年   1篇
  2015年   2篇
  2014年   2篇
  2013年   5篇
  2012年   4篇
  2011年   2篇
  2010年   2篇
  2009年   3篇
  2008年   2篇
  2007年   2篇
  2006年   5篇
  2005年   3篇
  2004年   1篇
  2003年   1篇
  2002年   3篇
  2000年   1篇
  1999年   4篇
  1998年   19篇
  1997年   10篇
  1996年   3篇
  1995年   4篇
  1994年   1篇
  1993年   7篇
  1992年   1篇
  1989年   1篇
  1988年   1篇
  1986年   1篇
  1985年   1篇
  1984年   4篇
  1982年   1篇
  1981年   1篇
  1979年   1篇
  1977年   4篇
  1976年   2篇
  1975年   2篇
  1974年   1篇
  1973年   1篇
排序方式: 共有116条查询结果,搜索用时 15 毫秒
1.
Leo Stone's "The Widening Scope of Indications for Psychoanalysis" has had a major influence on the way almost two generations of American psychoanalysts have been taught to think about and practice psychoanalysis. Contemporary elaborations and extensions of the ideas contained in Stone's paper have, however, been used to move us steadily toward a shift in the treatment paradigm that underlies the way psychoanalysis is currently being conducted. This contemporary tendency to enlarge the scope of the mode of action of psychoanalysis, in order to accommodate the wider range of patients being treated today, blurs those aspects of psychoanalytic technique that distinguish the unique psychoanalytic perspective from the more general psychotherapeutic perspective. Several ideas contained in Stone's paper are considered as a basis for clarifying this distinction and the technical implications deriving from it. Two clinical vignettes are presented to illustrate these issues.  相似文献   
2.
Pouliquen  M.  Denoual  M.  Jorel  C.  Radu  C.  Robbes  D.  Grand  J.  Awala  H.  Mintova  S.  Harnois  M.  Sagazan  O. de  Inoue  S.  Lebrasseur  E.  Yamada  K.  Okamoto  Y.  Mita-Tixier  A.  Mita  Y. 《Microsystem Technologies》2022,28(6):1313-1319
Microsystem Technologies - We demonstrate a new operation mode of thermal gas sensor based on thermal capacity extraction with identification algorithm. The system is a silicon microstructure...  相似文献   
3.
4.
191 nondisabled 18–64 yr olds completed the Disability Social Relationship Scale, which includes social situation subscales of Work, Dating, and Marriage, and disability subscales of Amputee, Epilepsy, Cerebral Palsy, and Blind. Results reveal significant differences across social situations and among specific disabilities, as well as a significant interaction between social situation and disability. Thus, situational context affects attitudes toward disabled persons. (26 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
5.
BACKGROUND: The mechanism behind the antiviral action of interferon (IFN) therapy in chronic hepatitis C virus (HCV) infection is not well understood, and, furthermore, few factors have been shown to be good predictors of a favourable response to IFN treatment in chronic HCV infection. METHODS: Freshly explanted liver cells and peripheral blood mononuclear cells (PBMC) from 80 patients with chronic HCV infection were used to study the capacity of IFN to induce the enzyme 2',5'-oligoadenylate synthetase (2'5'-AS) in vitro. The HCV genotype was determined in 53 patients. The induction of 2'5'-AS was correlated to the results of IFN-alpha treatment in 36 patients. RESULTS: Normalization of transaminases during IFN treatment was significantly associated with 2'5'-AS levels in liver cells cultured in the absence of IFN. A similar tendency, although not statistically significant, was found for IFN-induced levels of 2'5'-AS in liver cells. No such associations were found when PBMC were analysed. Six patients showed a sustained biochemical response. These six did not deviate significantly from the remaining patients with regard to base-line or IFN-induced levels of 2'5'-AS in liver cells or PBMC. Eradication of HCV RNA during IFN treatment did not correlate with 2'5'-AS levels in liver cells. Comparison of HCV genotype and clinical response showed that patients with genotype 3a had the most favourable outcome. No association was found between liver histology and treatment outcome. CONCLUSION: These data imply that direct effects of IFN on liver cells are of importance for the response to IFN treatment.  相似文献   
6.
In this report we describe three patients with developmental cortical abnormalities (generally referred as cortical dysplasia), revealed by MRI and operated on for intractable epilepsy. Tissue, removed for strictly therapeutic reasons, was defined as the epileptogenic area by electroclinical data and stereo EEG (SEEG) recordings. Tissue samples were processed initially for histology, and selected sections were further processed for immunocytochemical investigation in order to determine whether the region of cortical dysplasia was co-extensive with the epileptogenic area. In two patients with nodular heterotopia, disorganized aggregates of neurons (as revealed by neuronal cytoskeletal markers) were found within the nodules. Both pyramidal and local circuit neurons were present in the nodules, but no reactive gliosis was present. When nodules reached the cortex, the cortical layers were disrupted. In the patient with localized cortical dysplasia, a complete disorganization of the cortical lamination was found, and numerous neurons were also present in the white matter. Disoriented pyramidal neurons weakly labelled with cytoskeletal neuronal markers were also present but no cytomegalic cells were found. One of the patients with nodular heterotopia underwent only partial resection of both the 'epileptogenic area' and of the lesion; this patient still presents with seizures. The other patient with nodular heterotopia is seizure-free after a complete lesionectomy and excision of the epileptogenic area. The third patient, with focal cortical dysplasia, had two surgeries; she became seizure-free only after the excision of the epileptogenic area detected by SEEG recording. The present data suggest that the dysplastic areas identified by MRI should not be considered as the only place of origin of the ictal discharges. From the neuropathological point of view, the focal cortical dysplasia can be considered as a pure form of migrational disorder. However, the presence of large aggregates of neurons interspersed within the white matter, in the subcortical nodular heterotopia, suggests that a defect of neuronal migration could be associated with an exuberant production of neuroblasts and/or a disruption of mechanisms for naturally occurring cell death.  相似文献   
7.
刘惕生 《影像技术》2002,(4):53-54,49
天津牌荧光缩影医用X射线胶片是一种正色性、高感光度,中等反差,细颗粒,单面涂布感光层的胶片,专门适用于拍摄X射线间接摄影机荧光屏上的图像,其生产过程采用一系列先进而精密复杂的工艺技术,如:计算机控制双注法乳化,特殊晶型卤化银颗粒,新型化学增感技术,高速光学增感剂,新型坚膜剂等,因此其质量可与一些世界名牌产品媲美。  相似文献   
8.
9.
The present study was aimed at determining the ability of near‐infrared (NIR) spectroscopy to in situ describe fat oxidation kinetics in three different cereal‐based products: salted crackers (20% saturated palm oil and lauric oil, sprayed on surface); healthy crackers (10% unsaturated rapeseed oil, homogeneously distributed inside the product matrix); and moist pasteurised Asian noodles (1.5% unsaturated rapeseed oil, sprayed on surface). Products were stored under accelerated oxidation conditions at 40 °C. Lipid oxidation rates were determined from peroxide value (PV) measurements. We observed no significant changes in PV for the dry crackers (3 meq/kg after 60 days), a slight linear increase in PV for the healthy crackers (40 meq/kg after 60 days), and a rapid increase for the Asian noodles (80 meq/kg after 20 days). The NIR spectra were recorded between 1000 and 2500 nm by using a Fourier Transform NIR spectrometer, using an external probe. Measurements were done directly in situ on the product, on the ground samples, and on the extracted fat phase. The analysis of NIR spectral data by PLS statistical methods demonstrated some correlation trends (R2 = 0.575–0.897; RMSEC = 17–55%) for the products having a significant increase in PV. It was not possible to propose predictive models to calculate the oxidation rate.  相似文献   
10.
A restriction fragment length polymorphism (RFLP) analysis of the alpha- and beta-interferon (IFN) genes was performed in malignant cells from 52 patients with acute lymphocytic leukemia (ALL). Normal cell DNA was available for comparison in 23 of the patients. Ten patients were found to have gross alterations of their alpha- and beta-IFN genes. Leukemic cells from 2 ALL patients showed a complete loss of alpha- and beta-IFN genes. Seven patients had a hemizygous loss of one of the alpha- and beta-IFN alleles, as shown by RFLP analysis and/or loss of signal intensity. In one other patient the malignant clone was reduced to homozygosity with regard to the alpha- and beta-IFN genes, without loss of signal intensity. In patients without hemizygous deletions, the overall incidence of complete homozygosity for the alpha- and beta polymorphisms was higher than expected. Analysis of the data indicates that the total frequency of ALL clones with gross alterations of the IFN-loci is around 30%. A 9p24 probe detected hemizygous deletions in 2 cases of IFN gene deletions. In the other tested cases the deletions were interstitial. No deletions of 9p24 were detected in patients without allelic losses of IFN genes. In 5 cases of allelic IFN gene deletions, DNA from parents was available for comparison. In 4 cases the deleted allele was derived from the mother, whereas in the fifth it originated from the father. Pediatric ALL patients with IFN-gene deletions or homozygosity for all polymorphisms in the IFN-loci had a significantly worse prognosis than heterozygotes. We conclude that deletion of alpha- and beta-IFN genes is a relatively common event in ALL and that RFLP analysis of the IFN genes may provide additional prognostic information in childhood ALL. Whether or not the IFNs act as tumor-suppressor genes in this disease is not yet known.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号