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1口服低衰减胃肠道造影剂在腹盆部CT中的应用显示文摘Background: We designed and evaluated a low-attenuation oral contrast agent for abdominal-pelvic computed tomography (CT). Methods: In vitro studies, were performed initially to evaluate the imaging characteristics of multiple solutions. These studies resulted in two solutions being compared with the presently accepted oral CT agents of dilute iodinated contrast and water. Ninety-eight consec utive subjects already scheduled for routine outpatient abdominal-pelvic CT were enrolled. Subjects were randomized to water (n = 30), fiber solution (n = 32), polyethylene glycol (PEG; n = 11), or dilute iodinated solution (DI; n = 25). Examinations were then evaluated for gastric distention, small bowel distention, small bowel wall visualization, and colonic transit. A questionnaire was given to the study subjects for feedback concerning taste and potential side effects from these agents. Results: PEG tended to provide better bowel distention, wall visualization, and colonic transit compared with water, fiber solution, and DI. Areas of statistical significance included: (1) average bowel diameter in the left upper quadrant for water was 17.50 mm, whereas that for PEG was 21.88 mm (p < 0.05); (2) average bowel diameter in the pelvis for water was 14.79mm, that for fiber was 15.67mm, and that for PEG was 18.48 mm (p < 0.05); (3) wall visualizati on was better with PEG than with fiber (p < 0.05); (4) successful transit of contrast to the colon occurred in every subject who received PEG compared with only 20%of those received water and 39%of those who received fiber (p < 0.05). Similar trends for the superiority of PEG over DI were noted, although many of these did not reach statistical significance. Conclusion: PEG solution has imaging characteristics related to bowel wall visualization, luminal distention, and colonic transit that make it an effective oral agent for abdominal pelvic CT examination.Hebert J.J Taylor A.J Winter T.C. 赵双 2006世界核心医学期刊文摘(胃肠病学分册)2006,0,4:5
2Design and analysis of a high power density and high efficiency permanent magnet DC motor显示文摘C.C Hwang J.J Chang 2000Journal of Magnetism and Magnetic Materials2000,,1:3
3看电视的认知卷入程度低吗?显示文摘斯博士是安德森教授的学生)。全文从认识心理学的角度主要从认知心理学的三个层面,即探讨电视对儿童的影响是西方心理行为层面、认知层面和生理层面揭学界继暴力电视对儿童的影响之后示了观看电视是一种主动的认知加的又一研究热点。围绕这一研究热工活动这一命题。本译文则是论文点,目前有两种针锋相对的观点,以中从生理层面论述这一命题的部分。耶鲁大学心理学教授辛格博士为代作者在这部分中主要阐述了两方面表的反应性理论(reactive theory)的问题,即观看电视与阅读的差异认为,观看电视是一种消极被动的以及电视刺激特征在儿童注意中的活动,观众的意图、计划、策略以及作用问题。尤其侧重从脑电波的变选择性在观看电视时很少起作用。化、眼球活动的方式、左右脑的主导而以麻省大学心理学教授安德森机制以及心理投人量的多少四个方博士为代表的主动性理论(active 面比较分析了观看电视与阅读的差lhoory)则认为,观看电视是一种主异,得出了与原来人们的认识不同动的认知活动,它是观众、节目以及的结果。观看情境之间的一种主动的认识转换过程。这两种理论都得了一些实验研究的支持。但从目前情况来看,主动性理论以其充分而富有说服力的证据逐渐为社会所接受,并成为美国政府制定儿童电视节目保护法的部分依据。本译文摘译自主动性理沦的代表人物安德森教授1991年提供给译者的打印搞论文《电视与认识》J.J博恩斯 D.R安德森 张令振 1991现代传播(中国传媒大学学报)1991,16,4:2
4专利检索系统中可视化查询的比较研究显示文摘专利检索是一个非常复杂的过程,用户为了迅速高效地完成检索任务需要得到支持。专利检索过程的许多环节可以借助一些工具完成,其中就包括查询(式)构造工具。查询构造是一项高度依赖人工的任务,工具只能实现对可能有用数据进行预先计算,并针对用户进行可视化。信息检索系统中,查询过程和查询结果可视化的方式有很多。本研究提出了两种典型的原型系统设计,用于在专利检索过程中对不同的查询表达式进行比较。原型包含查询表达式构造因素和结果集大小因素,两种因素对于专利领域专家探究查询表达式的调整对检索效率的影响至关重要。本文开发的系统有助于在专利检索过程中对复杂查询表达式进行逐步优化,系统设计思想基于了领域专家型知识工程。Julia J.Jürgens 周雷 李颖 孟令恩 石崇德 何彦青 2015情报工程2015,1,5:2
5Characterization of Atmospheric Aerosol over XiAn in the South Margin of the Loess Plateau, China显示文摘Xiao Y Zhang J.J Cao L.M Li R Arimoto Y Cheng B Huebert D Wang 2002Atmospheric Environment2002,,26:2
6Exchange bias and magnetotransport properties in IrMn/NiFe/FeMn structures显示文摘Guo Z.B Wu Y.H Qiu J.J Zong B.Y and Han G.C 0,,:1
7查看详情显示文摘Hoffman J.D Weeks J.J 0,,:1
8An analysis of environmental management, organizational context and performance of Spanish hotels显示文摘M.J álvarez Gil J Burgos Jiménez J.J Céspedes Lorente 2001Omega2001,,:1
9The corporate social performance and corporate financial performance debate显示文摘Griffin J.J Mahon J.F 0,,01:1
10Defective validity of the Machiavellianism scale显示文摘Ray J.J 0,,:1
11查看详情显示文摘Dalluge J.J Nelson B.C 0,,:1
12Mapping the domain of expressivity:multi-method evidence for a hierarchical model显示文摘Gross J.J John O.P 0,,01:1
13Characterization of diamond-like carbon coatings prepared by pulsed bias cathodic vacuum arc deposition显示文摘Wu J.B Chang J.J 0,,2:1
14Isotherms and sequential extraction procedures for evaluating sorption and distribution of heavy metals in soils显示文摘M.T Morera J.C Echeverr??a C Mazkiarán J.J Garrido 2001Environmental Pollution2001,,2:1
15The depressor caudal ventrolateral medulla: Its correlation with the pressor dorsomedial and ventrolateral medulla and the depressor paramedian reticular nucleus显示文摘J.H Hsieh J.J Wu C.T Yen C.Y Chai 1998Journal of the Autonomic Nervous System1998,,1:1
16Technological Change and Petroleum Exploration in the Gulf of Mexico显示文摘Managi S Opaluch J.J Jin D Grigalunas T.A 0,,05:1
17Postictal behaviors associated with psychogenic nonepileptic seizures显示文摘Chabolla D.R Shih J.J 0,,:1
18Taxonomic diversity of bacteria associated with the roots of field-grown transgenic Brassica napus cv. Quest, compared to the non-transgenic B. napus cv. Excel and B. rapa cv. Parkland显示文摘S.D Siciliano J.J Germida 1999FEMS Microbiology Ecology1999,,3:1
19The Arabidopsis histidine phosphotransfer proteins are redundant positive regulators of cytokinin signaling显示文摘Hutchison C.E Li J Argueso C Gonzalez M Lee E Lewis M.W Maxwell B.B Perdue T.D SchalLer G.E Alonso J.M Ecker J.R Kieber J.J 0,,:1
20Thermal behaviour during the pyrolysis of low rank perhydrous coals显示文摘A Arenillas F Rubiera J.J Pis M.J Cuesta M.J Iglesias A Jiménez I Suárez-Ruiz 2003Journal of Analytical and Applied Pyrolysis2003,,:1
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