番茄褐色皱纹果病毒(Tomato brown rugose fruit virus,ToBRFV)是烟草花叶病毒属(Tobamovirus)中新发现的一种RNA病毒。该病毒于2014年首次在以色列被鉴定,随后在全球范围内快速扩散,目前已在亚洲、欧洲、美洲和非洲的多个国家和地区广...番茄褐色皱纹果病毒(Tomato brown rugose fruit virus,ToBRFV)是烟草花叶病毒属(Tobamovirus)中新发现的一种RNA病毒。该病毒于2014年首次在以色列被鉴定,随后在全球范围内快速扩散,目前已在亚洲、欧洲、美洲和非洲的多个国家和地区广泛分布,对番茄、辣椒等重要茄科作物的安全生产构成了严重威胁。与烟草花叶病毒属的其他成员相比,ToBRFV在运动蛋白区域具有独特的分子特征,使其能够突破番茄中常见的Tm-2等抗病毒基因,表现出更强的侵染能力。本文系统梳理了近年来国内外关于ToBRFV的研究进展,从ToBRFV的发生与传播、结构特征、检测鉴定、抗病研究、综合防治等研究进展方面进行了归纳总结,以期为人们认识病毒、有效防治病毒病提供参考。展开更多
Information about the protolith of the Huangtuling granulite in North Dabieshan has been unavailable. The complex evolution history of the rock and its host basement must be further discussed. LA-ICP-MS U-Pb dating wa...Information about the protolith of the Huangtuling granulite in North Dabieshan has been unavailable. The complex evolution history of the rock and its host basement must be further discussed. LA-ICP-MS U-Pb dating was conducted on three textural domains in zircon from a high-temperature, high-pressure felsic granulite in the Huangtuling area, North Dabieshan, Central China. The metamorphic growth-derived detrital zircon domain yields a 207^ pb/206^Pb age in the range of （2 49±54 ） -- （2 500±180） Ma. The magmatic genesis-derived detrltal zircon domain gives a 207^pb/ 206^Pb age ranging from 2 628 Ma to 2 690 Ma, with an oldest 206^ pb/ 238^U age of （2 790 ± 150） Ma. The metamorphic overgrowth or metamorphic recrystallization zircon domain yields a diesordia with an upper intercept age of （2 044. 7 ± 29.3 ） Ma. Compositions of the mineral assemblage, major element geochemistry, and especially the complex interior texture of the zircon suggest that the prololith of the felsic granulite is of sedimentary origin. Results show that the protolith material of the granulite came from a provenance with a complex thermal history, i.e. -2.8 Ga magmatlsm and -2.5 Ga metamorphism, and was deposited in a basin not earlier than 2.5 Ga. The high-temperature and high-pressure granulite-facies metamorphic age was precisely constrained at （2.04±0.03） Ga, which indicates the granulite in Huangtuling area should be a relict of a Paleoproterozoic UHT （ultrahigh temperature） metamorphosed slab.展开更多
NO oxidation is the key reaction for the oxidative NO x removal process.In this work,the catalytic NO oxidation performance of the Al2O3 supported metal oxide catalysts(M-Al2O3,M=V,Mn,Fe,Co,Ni and Ce)is evaluated.The ...NO oxidation is the key reaction for the oxidative NO x removal process.In this work,the catalytic NO oxidation performance of the Al2O3 supported metal oxide catalysts(M-Al2O3,M=V,Mn,Fe,Co,Ni and Ce)is evaluated.The oxidation product is absorbed by the alkaline solution for NO x removal.The NO oxidation activity increases in the following order:V<<Ce<Ni<Fe<Co<Mn.As the NO oxidation involves the O uptake into the metal oxide lattice and oxidation of the adsorbed NO by the lattice O,the highest activity of Mn is attributed to the appropriate redox potential of Mn,which favors both the O uptake and the NO oxidation steps.For all the M-Al2O3 catalysts,there is an intermediate temperature to achieve maximum NO conversion,which is lower for more efficient M-Al2O3 catalyst.The temperature dependence suggests that the NO oxidation at low temperature is kinetically controlled while it is thermodynamically limited at higher temperature.The NO x removal ratio by the alkaline solution absorption increases with the NO2/NO ratio,with a maximum removal ratio of 80%when the NO2/NO ratio is higher than 3,indicating that a very high NO conversion is unnecessary.展开更多
文摘番茄褐色皱纹果病毒(Tomato brown rugose fruit virus,ToBRFV)是烟草花叶病毒属(Tobamovirus)中新发现的一种RNA病毒。该病毒于2014年首次在以色列被鉴定,随后在全球范围内快速扩散,目前已在亚洲、欧洲、美洲和非洲的多个国家和地区广泛分布,对番茄、辣椒等重要茄科作物的安全生产构成了严重威胁。与烟草花叶病毒属的其他成员相比,ToBRFV在运动蛋白区域具有独特的分子特征,使其能够突破番茄中常见的Tm-2等抗病毒基因,表现出更强的侵染能力。本文系统梳理了近年来国内外关于ToBRFV的研究进展,从ToBRFV的发生与传播、结构特征、检测鉴定、抗病研究、综合防治等研究进展方面进行了归纳总结,以期为人们认识病毒、有效防治病毒病提供参考。
文摘Information about the protolith of the Huangtuling granulite in North Dabieshan has been unavailable. The complex evolution history of the rock and its host basement must be further discussed. LA-ICP-MS U-Pb dating was conducted on three textural domains in zircon from a high-temperature, high-pressure felsic granulite in the Huangtuling area, North Dabieshan, Central China. The metamorphic growth-derived detrital zircon domain yields a 207^ pb/206^Pb age in the range of （2 49±54 ） -- （2 500±180） Ma. The magmatic genesis-derived detrltal zircon domain gives a 207^pb/ 206^Pb age ranging from 2 628 Ma to 2 690 Ma, with an oldest 206^ pb/ 238^U age of （2 790 ± 150） Ma. The metamorphic overgrowth or metamorphic recrystallization zircon domain yields a diesordia with an upper intercept age of （2 044. 7 ± 29.3 ） Ma. Compositions of the mineral assemblage, major element geochemistry, and especially the complex interior texture of the zircon suggest that the prololith of the felsic granulite is of sedimentary origin. Results show that the protolith material of the granulite came from a provenance with a complex thermal history, i.e. -2.8 Ga magmatlsm and -2.5 Ga metamorphism, and was deposited in a basin not earlier than 2.5 Ga. The high-temperature and high-pressure granulite-facies metamorphic age was precisely constrained at （2.04±0.03） Ga, which indicates the granulite in Huangtuling area should be a relict of a Paleoproterozoic UHT （ultrahigh temperature） metamorphosed slab.
基金supported by the research funds from RIPP, SINOPEC
文摘NO oxidation is the key reaction for the oxidative NO x removal process.In this work,the catalytic NO oxidation performance of the Al2O3 supported metal oxide catalysts(M-Al2O3,M=V,Mn,Fe,Co,Ni and Ce)is evaluated.The oxidation product is absorbed by the alkaline solution for NO x removal.The NO oxidation activity increases in the following order:V<<Ce<Ni<Fe<Co<Mn.As the NO oxidation involves the O uptake into the metal oxide lattice and oxidation of the adsorbed NO by the lattice O,the highest activity of Mn is attributed to the appropriate redox potential of Mn,which favors both the O uptake and the NO oxidation steps.For all the M-Al2O3 catalysts,there is an intermediate temperature to achieve maximum NO conversion,which is lower for more efficient M-Al2O3 catalyst.The temperature dependence suggests that the NO oxidation at low temperature is kinetically controlled while it is thermodynamically limited at higher temperature.The NO x removal ratio by the alkaline solution absorption increases with the NO2/NO ratio,with a maximum removal ratio of 80%when the NO2/NO ratio is higher than 3,indicating that a very high NO conversion is unnecessary.
