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金属氧化物异质结气体传感器气敏增强机理 被引量:23
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作者 唐伟 王兢 《物理化学学报》 SCIE CAS CSCD 北大核心 2016年第5期1087-1104,共18页
金属氧化物异质结由于费米能级效应、不同组分之间的协同作用,常被用来提高电阻型金属氧化物半导体气体传感器的气敏特性。本文简述了近年来国内外金属氧化物异质结材料的类别,主要分为混合氧化物结构、层状结构、第二相粒子修饰结构、... 金属氧化物异质结由于费米能级效应、不同组分之间的协同作用,常被用来提高电阻型金属氧化物半导体气体传感器的气敏特性。本文简述了近年来国内外金属氧化物异质结材料的类别,主要分为混合氧化物结构、层状结构、第二相粒子修饰结构、一维纳米结构和核-壳结构;重点综述了金属氧化物异质结的气敏增强机理,包括异质结效应、协同效应、催化溢流效应、响应反型、载流子分离及微结构调控六大机理;分析了当前异质结气体传感器面临的瓶颈。最后对纳米异质结气体传感器的发展进行了展望,今后金属氧化物异质结气体传感器可以从明确异质结界面机理展开,这将为自下而上地设计出符合实际需要的气体传感器提供一定参考。 展开更多
关键词 金属氧化物异质结 协同效应 溢流效应 响应反型 载流子分离 微结构调控
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SEN virus does not affect treatment response in hepatitis C virus coinfected patients but SEN virus response depends on SEN virus DNA concentration 被引量:2
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作者 Abdurrahman Sagin Ortwin Adams +3 位作者 OliverKirschberg AndreasErhardt TobiasHeintges Dieter Hussinger 《World Journal of Gastroenterology》 SCIE CAS CSCD 2004年第13期1893-1897,共5页
AIM: To clarify the effect of SEN virus (SENV) infection on a combination therapy including interferon alfa (IFN-α) or pegylated-IFN with ribavirin in patients with chronic hepatitis and the effect of a combination t... AIM: To clarify the effect of SEN virus (SENV) infection on a combination therapy including interferon alfa (IFN-α) or pegylated-IFN with ribavirin in patients with chronic hepatitis and the effect of a combination therapy on SENV.METHODS: SENV DNA was determined by polymerase chain reaction in serum samples from 95 patients with chronic hepatitis C. Quantitative analysis was done for SENV H DNA.RESULTS: Twenty-one (22%) of 95 patients were positive for SENV DNA. There was no difference in clinical and biochemical parameters between patients with HCV infection alone and coinfected patients. The sustained response rate for HCV clearance after combination therapy did not differ between patients with SENV (52%) and without SENV(50%, n.s.). SENV DNA was undetectable in 76% of the initially SENV positive patients at the end of follow-up. SENV H response to combination therapy was significantly correlated with SENV DNA level (P=-0.05).CONCLUSION: SENV infection had no influence on the HCV sustained response rate to the combination therapy.Response rate of SENV to the combination therapy depends on SENV DNA level. 展开更多
关键词 Adult Antiviral Agents DNA Virus Infections DNA Viruses purification DNA Viral Drug Therapy Combination Female HEPACIVIRUS Hepatitis C Chronic Humans Interferon Alfa-2a INTERFERON-ALPHA Male Middle Aged Polyethylene Glycols Prevalence RNA Viral RIBAVIRIN
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Tall building configuration effects on their response to earthquake loading
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作者 Mohammed S. Al-Ansari 《Journal of Civil Engineering and Architecture》 2009年第5期30-39,共10页
This paper studies and analyzes the response and behavior of regular and irregular building structures in earthquake zones. The non-linear dynamic response of tall buildings structures were obtained using five simulat... This paper studies and analyzes the response and behavior of regular and irregular building structures in earthquake zones. The non-linear dynamic response of tall buildings structures were obtained using five simulated models, which were subjected to UBC code dynamic and static equivalent earthquake loads. The maximum response of the structural models were computed and analyzed in order to verify the effects of building configuration on drift results. Drift results agreed with codes recommendations regarding building configuration and showed that regular buildings performance in resisting earthquake forces is better than that of irregular buildings. 展开更多
关键词 DRIFT CONFIGURATION RESPONSE earthquake loads
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