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A Retrotransposon Insertion in GhMML3_D12 Is Likely Responsible for the Lintless Locus li 3 of Tetraploid
图位克隆 棉花纤维 起始基因 Li3
2024/5/17
20
论文简介：利用无纤维突变体，通过图位克隆了纤维起始基因Li3，该基因是位于染色体D12（GhMML3_D12）上的R2R3-MYB转录因子。借助序列分析和遗传分析，发现li3是一个功能缺失的等位基因，和N3是一对具有加性效应的同源突变体，对纤维(绒或棉)的起始具有加性作用。这些发现为影响棉花纤维起始的遗传因素提供了新的信息。
大兴安岭南段维拉斯托高分异花岗岩体的成因与演化及其对Sn-(Li-Rb-Nb-Ta)多金属成矿作用的制约
高分异I型花岗岩 大兴安岭南段 维拉斯托矿床 锆石U-Pb年龄 Nd-Hf同位素 稀有金属 地球化学
2019/4/25
近年来，大兴安岭南段维拉斯托矿区深部Sn-Li找矿取得重大突破，但人们目前对与成矿作用密切相关的深部花岗岩体成因与演化及其对稀有金属矿化存在怎样的制约尚不清楚.为此，针对该岩体开展了年代学、地球化学和Sr-Nd-Hf同位素组成研究，获得的锆石LA-ICP-MS U-Pb年龄为130.7±0.5 Ma(MSWD=0.53)，属早白垩世岩浆活动产物.化学组成上表现为高硅、富碱(高钠)，贫钙、镁、铁和极...
探讨一种新型磺酰亚胺锂盐（三氟甲基磺酰）（全氟丁基磺酰）亚胺锂{Li[（CF3SO2）（n-C4F9SO2）N]，LiTNFSI}的碳酸丙烯酯（PC）电解液的电导率、耐氧化性及基于该电解液的LiNi0.5Mn1.5O4|Li电池循环性能和自放电行为.结果表明，1.0 mol/L LiTNFSI-PC电解液的室温电导率适中，氧化电位较高，并且基于该电解液的LiNi0.5Mn1.5O4|Li电池表现出...
采用微波辅助加热法合成了Na+，Li+，Bi3+掺杂的CaWO4：Eu3+荧光粉. 利用X射线衍射仪和扫描电子显微镜对样品的微观结构进行了表征，利用荧光分光光度仪对样品的激发光谱、发射光谱和能级寿命进行了测试和分析. 结果表明，掺杂浓度（摩尔分数）均为3.75%的Eu3+，Na+，Li+，Bi3+掺杂的CaWO4均保持了基质的四方晶相结构. Na+，Li+，Bi3+单掺杂或共掺杂后的样品比CaWO...
早—中更新世沉积年代的确定是第四纪研究领域亟待解决的难题，电子自旋共振（ESR）测年法为该时段沉积物定年提供了可能。但已有的研究发现：石英Ti心和Al心ESR信号完全衰退“回零”或达到较稳定“残留”所需时间较长，因而其可信性备受质疑。本研究选取腾格里沙漠白碱湖地区BJ14钻孔中5个不同深度的沉积物，分别基于其中石英Ti心和Al心信号进行了ESR定年。测年结果显示：（1）2个样品基于Al心ESR信号...
采用高温固相法合成Sr3B2O6：Eu3+，Li+红色荧光粉，考察了激活剂Eu3+和电荷补偿剂Li+浓度对Sr3B2O6：Eu3+，Li+荧光粉发光性能的影响。结果表明：适量掺杂Eu3+、Li+离子并不改变Sr3B2O6的结构。当Eu3+掺杂量为4%、Li+的掺杂量为8%时，在900 ℃下灼烧2 h可以得到发光性能最佳的Sr2.9B2O6：0.04Eu3+，0.08Li+红色荧光粉。以394 nm...
P-Li-Be Bearing Pegmatites of the South East Brazil
Gem Rich Pegmatite Phosphate Li Tourmaline Beryl Triphylite Ferrisiklerite Heterosite
2013/3/7
The P-Li-Nb pegmatites are located in the south of Brazil, in the states of Minas Gerais and Espirito Santos. They represent the largest pegmatite fields of Brazil and the richest in precious stones. ...
采用柠檬酸辅助的溶胶-凝胶法制备了Fe3+掺杂Li 1.1Fe0.05 V2.95 O8 及对比样品 LiV3O8 正极材料.使用TG-DTA 、XRD、FT-IR 等手段表征了正极材料的物理化学特性,并采用EIS、恒电流充放电等手段研究了其电化学性能.结果表明: Fe3+掺杂LiV3 O8 与对比LiV3 O8 相比,能在更低的温度下晶化,能在相同温度、相同时间煅烧下保持更小的晶粒度. Li1....
Infrared Reflectance Study of Thermally Treated Li- and Cs-Montmorillonites
Cs-Montmorillonite Li-Montmorillonite Longitudinal-Optic (LO) Mode Migration Reflectivity Transverse-Optic (TO) Mode
2011/12/22
Abstract: The structure of Li- and Cs-montmorillonites was studied using infrared (IR) reflectance spectroscopy. The spectra of heat-treated clays between 80 and 220 °C were analyzed by Kramers-Kr&oum...
长期以来，对高山三尖杉（Cephalotaxus alpina(Li) L.K.Fu）分类地位的争议缺少可靠证据。本文从居群采样的水平上比较了高山三尖杉和三尖杉（Cephalotaxus fortunei Hooker）的叶片和种子形态特征，两者除种子的长宽比率无显著差异外，种子长度，宽度，厚度，长厚比率，宽厚比率以及叶片长度和宽度均差异极显著。此外，通过散点图分析表明两者的种子宽厚比和叶片宽度的...
Prediction of equilibrium Li isotope fractionation between minerals and aqueous solutions at high P and T: an efficient ab initio approach
Li isotope fractionation equilibrium minerals aqueous
2011/8/11
Abstract: The mass-dependent equilibrium stable isotope fractionation between different materials is an important geochemical process. Here we present an efficient method to compute the isotope fracti...
Prediction of equilibrium Li isotope fractionation between minerals and aqueous solutions at high P and T: an efficient ab initio approach
equilibrium isotope fractionation aqueous solutions efficient initio approach
2011/10/14
The mass-dependent equilibrium stable isotope fractionation between different materials is an important geochemical process. Here we present an efficient method to compute the isotope fractionation be...
Atomic fragments from the nuclear reaction of the ${}^{6}$Li atom with slow neutrons
Atomic fragments the nuclear reaction Li atom slow neutrons
2011/8/5
Abstract: Approximate probabilities of formation of various atoms and ions in different bound states are determined for the exothermic nuclear $(n,{}^{6}$Li$;t,{}^{4}$He)-reaction of atomic lithium-6 ...
Differential energy measurement between He- and Li-like uranium intra-shell transitions
energy measurement He- and Li-like uranium intra-shell transitions
2011/9/5
We present the first clear identification and highly accurate measurement of the intra-shell transition 1s2p 3P2 ! 1s2s 3S1 of He-like uranium performed via X-ray spectroscopy.The present experiment h...
Complete and incomplete fusion cross sections for $^{6}$Li+$^{159}$Tb have been measured at energies around the Coulomb barrier by the $\gamma$-ray method. The measurements show that the complete fusi...