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土壤外源钒施加对玉米中钒积累、亚细胞分布和非蛋白巯基含量的影响 被引量:6
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作者 侯明 霍岩 +1 位作者 张志专 韦明奉 《农业环境科学学报》 CAS CSCD 北大核心 2020年第5期964-972,共9页
本研究旨在探讨玉米对钒(V)的耐受性机制及富集机理。采用差速离心法和DTNB[5,5′-二硫代双(2-硝基苯甲酸)]比色法,研究了不同V浓度(0、100、200、300、500 mg·kg^-1)胁迫下,V在玉米中的积累、亚细胞分布和非蛋白巯基物质对V胁迫... 本研究旨在探讨玉米对钒(V)的耐受性机制及富集机理。采用差速离心法和DTNB[5,5′-二硫代双(2-硝基苯甲酸)]比色法,研究了不同V浓度(0、100、200、300、500 mg·kg^-1)胁迫下,V在玉米中的积累、亚细胞分布和非蛋白巯基物质对V胁迫的响应。结果表明,V在玉米各部位中积累顺序为:根>叶>茎>>子实,其中74.8%~95.6%的V富集于根部。随着V胁迫浓度的增加,V的富集系数(BF)从0.061增加到0.306,而转运系数(TF)从0.336下降到0.108,从而降低了过量V对玉米茎叶的毒性。V主要积累于植物亚细胞组分的细胞壁(F1)和可溶性组分(F4)中,两者在茎叶中占总累积量的60.76%~75.75%,在根中占总累积量的82.66%~87.02%。土壤中一定的V浓度(V≤300 mg·kg^-1)可促进玉米幼苗体内非蛋白巯基(NPT)和植物螯合肽(PCs)的合成,植物也通过消耗谷胱甘肽(GSH)来合成植物螯合肽(PCs),从而降低V的毒性。因此,玉米幼苗抗V毒性的机制包括细胞壁沉积和重金属分区,以及非蛋白巯基化合物的合成。 展开更多
关键词 玉米幼苗 积累 亚细胞分布 非蛋白巯基化合物
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Two Manganese Halide Hybrids Based on 1-Butyl-2,3-dimethylimidazolium:Synthesis,Crystal Structure and Photoluminescence
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作者 CHENG Min JIN Jian-Ce +3 位作者 LI Jian-Rong zhang zhi-zhuan GONG Liao-Kuo HUANG Xiao-Ying 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2021年第7期857-864,837,共9页
Two new inorganic-organic hybrid manganese(II)halide crystals,namely[BMMIm]2[MnCl4](1,BMMIm=1-butyl-2,3-dimethylimidazolium)and[BMMIm]2[MnBr4](2),have been obtained simply by heating/stirring with nearly 100%yield.Sin... Two new inorganic-organic hybrid manganese(II)halide crystals,namely[BMMIm]2[MnCl4](1,BMMIm=1-butyl-2,3-dimethylimidazolium)and[BMMIm]2[MnBr4](2),have been obtained simply by heating/stirring with nearly 100%yield.Single-crystal X-ray diffraction(SCXRD)study reveals that 1 crystallizes in triclinic space group of P with a=10.0176(7),b=14.9603(11),c=12.9086(8)Å,a=91.060(4)°,β=110.204(5)°,g=92.361(4)°,V=1235.19(12)Å^(3),Z=2,Dc=1.353 g·cm^(-3),F(000)=526,μ=0.978 mm^(-1),R=0.0410 and wR=0.0690(I>2σ(I))and M_(r)=503.23;2 belongs to orthorhombic space group of P212121 with a=10.0176(7),b=14.9603(11),c=17.4450(14)Å,V=2614.4(3)Å^(3),Z=4,Dc=1.730 g·cm^(-3),F(000)=1340,μ=6.629 mm^(-1),R=0.0440 and wR=0.0520(I>2σ(I))and Mr=681.07.The ionic compounds 1 and 2 are composed of mononuclear tetrahedral[MnX4]2-anion and two ionic liquid cations of[BMMIm]+.The photoluminescence(PL)of 1 and 2 was characterized and the influence of halogen atom types on PL was investigated. 展开更多
关键词 manganese halide ionic liquid organic-inorganic hybrid crystal structure luminescence property
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Two New Antimony(Ⅲ)Chloride Hybrids Composed of Mononuclear[SbCl_(6)]^(3-)Unit and Ionic Liquid Cations with Different Length of Alkyl Chain
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作者 zhang zhi-zhuan JIN Jian-Ce +2 位作者 GONG Liao-Kuo DU Ke-Zhao HUANG Xiao-Ying 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2021年第9期1183-1193,1110,共12页
Two new hybrid chloroantimonates,namely,[Prmim]_(3)SbCl_(6)(1,Prmim=1-propyl-3-methylimidazolium)and[Hmim]_(3)SbCl_(6)(2,Hmim=1-hexyl-3-methylimidazolium),were synthesized in ionic liquids(ILs)with the yields of 97%an... Two new hybrid chloroantimonates,namely,[Prmim]_(3)SbCl_(6)(1,Prmim=1-propyl-3-methylimidazolium)and[Hmim]_(3)SbCl_(6)(2,Hmim=1-hexyl-3-methylimidazolium),were synthesized in ionic liquids(ILs)with the yields of 97%and 72%,respectively.Single-crystal X-ray diffraction(SCXRD)study reveals that 1 crystallizes in monoclinic,space group Pn with a=15.2988(12),b=13.6388(10),c=15.6761(13)A,β=98.677(7)°,V=3233.5(4)A^(3),Z=4,D_(c)=1.459 g·cm^(-3),F(000)=1440,μ=1.370 mm^(-1),R=0.0589 and wR=0.1366(I>2σ(I));2 crystallizes in the hexagonal space group of P63 with a=27.7471(6),b=27.7471(6),c=8.9811(2)A,V=5988.2(3)A^(3),Z=6,D_(c)=1.391 g·cm^(-3),F(000)=2592,μ=1.121 mm^(-1),R=0.0420 and wR=0.0726(I>2σ(I)).The photophysical properties of the title compounds were studied by solid-state optical absorption,photoluminescent excitation/emission(PLE/PL),PL decay spectra and photoluminescent quantum yield(PLQY).1 and 2 exhibit PL peaks at 627 and 607 nm,Stokes shifts of 257 and 242 nm,and PLQY of 32.5%and 49.2%,respectively.The distinct photo physical characteristics of 1 and 2 are highly related to the distortion extent of the[SbCl_(6)]^(3-)unit. 展开更多
关键词 antimony(Ⅲ)chloride ionic liquid luminescence distortion
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