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Chi Phase after Short-term Aging and Corrosion Behavior in 2205 Duplex Stainless Steel
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作者 Qi SUN Jian WANG +4 位作者 Hua-bing LI Yue LI Ya-di HU Jin-gang BAI Pei-de HAN 《钢铁研究学报:英文版》 SCIE EI CAS CSCD 2016年第10期1071-1079,共9页
Correlation between pitting corrosion behavior and chi( χ )phase formed after a short-term aging(5,10 and 15 min)at 850 ℃ of 2205 duplex stainless steel(DSS)was investigated using potentiodynamic polarization tests,... Correlation between pitting corrosion behavior and chi( χ )phase formed after a short-term aging(5,10 and 15 min)at 850 ℃ of 2205 duplex stainless steel(DSS)was investigated using potentiodynamic polarization tests,optical microscopy,and scanning electron microscopy equipped with energy-dispersive spectrum system.Results showed that after aging for 5min,the χ phase initially precipitated at ferrite grain boundaries,developed and then became linked with prolonging aging time.The χ phase was rich in Cr and Mo,resulting in formation of depleted zones nearby.The χ phase could reduce corrosion resistance of DSS and slightly influence its stability,but the specimens still displayed the capacity for repassivation.Some lines of evidence showed that stable pitting corrosion initiated at the boundaries of precipitates.The χ phase was selectively corroded during the first stage of corrosion and then the depleted zones nearby were attacked.In addition,the grain size and volume of precipitates also affected pit nucleation and progress,and suitable size and distribution of χ phase could aggravate pit initiation at precipitate boundaries.The χ phase with considerably low volume fraction and small size was not sensitive position for pit initiation. 展开更多
我国中东部地区蜱中斑点热群立克次体与新型布尼亚病毒复合感染调查研究 预览 被引量:1
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作者 范亚迪 胡建功 +7 位作者 崔晓鸣 郭辰涛 沃颖 张小爱 张泮河 黎浩 刘玮 曹务春 《寄生虫与医学昆虫学报》 CAS 北大核心 2016年第2期86-90,共5页
为了验证我国中东部发热伴血小板减少综合征流行地区-信阳和济南的蜱中有斑点热群立克次体存在,且有复合感染新型布尼亚病毒的情况,用布旗法和动物体表检查法在河南省信阳市和山东省济南市捕获蜱,采用PCR和RT-RCR进行病原体感染筛查... 为了验证我国中东部发热伴血小板减少综合征流行地区-信阳和济南的蜱中有斑点热群立克次体存在,且有复合感染新型布尼亚病毒的情况,用布旗法和动物体表检查法在河南省信阳市和山东省济南市捕获蜱,采用PCR和RT-RCR进行病原体感染筛查。信阳市捕获长角血蜱215只,其中游离蜱164只,寄生蜱51只。37只蜱斑点热群立克次体检测阳性,阳性率17.2%;38只蜱新型布尼亚病毒检测阳性,阳性率为17.7%;4只蜱斑点热群立克次体与新型布尼亚病毒复合感染,复合感染率为1.9%。山东省捕捉到166只寄生蜱,均为长角血蜱,4只蜱斑点热群立克次体检测阳性,阳性率为2.4%。6只蜱新型布尼亚病毒检测阳性,阳性率为3.6%;2只蜱为斑点热立克次体与新型布尼亚病毒复合感染,复合感染率为1.2%。结果证实我国中东部地区存在斑点热立克次体与新型布尼亚病毒复合感染。 展开更多
关键词 斑点热群立克次体 新型布尼亚病毒 复合感染
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Interaction Between HMG Proteins (1+2) and the Negative Regulatory Region 1(NCR1) in the 5’-flanking Sequence of the Human β-globin Gene
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作者 钱若兰 陈雅娣 +3 位作者 胡玉龙 李民乾 王中怀 徐耀良 《中国科学:化学英文版》 SCIE EI CAS 1993年第8期933-939,共7页
The pattern of high mobility group proteins 1 and 2 (HMG1,2) interaction with the 5’-flanking sequence of the human β-globin gene has been analyzed by scanning tunnelling microscopy (STM). A 200 bp negative regula... The pattern of high mobility group proteins 1 and 2 (HMG1,2) interaction with the 5’-flanking sequence of the human β-globin gene has been analyzed by scanning tunnelling microscopy (STM). A 200 bp negative regulatory region in the 5’-flanking sequence of the human β-globin gene can be folded by HMG proteins 1 and 2 into a circular structure (diameter 70±6) with a linear tail which seems to be a left-handed double helix structure. 展开更多
关键词 HMG protein STM Β-GLOBIN gene CHROMATIN FOLDING
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