A series of novel red-emitting BaLiZn_(3)(BO_(3))_(3):Eu^(3+)phosphors were synthesized through the high temperature solid state reaction method.The phase composition,crystal structure,morphology and photo luminescenc...A series of novel red-emitting BaLiZn_(3)(BO_(3))_(3):Eu^(3+)phosphors were synthesized through the high temperature solid state reaction method.The phase composition,crystal structure,morphology and photo luminescence property of the BaLiZn_(3)(BO_(3))_(3):Eu^(3+)samples were systematically investigated.The phosphor can be efficiently excited by the near ultraviolet light(NUV)of 396 nm and blue light of 466 nm,and give out red light emission at 618 nm corresponding to the electric dipole transition(^(5)D_(0)→^(7)E_(2)).The optimal doping concentration of Eu^(3+)ions in BaLiZn_(3)(BO_(3))_(3)is determined to be about 3 mol%,and the concentration-quenching phenomenon arise from the electric dipole-dipole interaction.The temperature dependent luminescence behavior of BaLiZn_(3)(BO_(3))_(3):0.03 Eu^(3+)phosphor exhibits its good thermal stability,and the activation energy for thermal quenching characteristics is calculated to be 0.1844 eV.The decay lifetime of the BaLiZn_(3)(BO_(3))_(3):0.03 Eu^(3+)is measured to be 1.88 ms.These results suggest that the BaLiZn_(3)(BO_(3))_(3):Eu^(3+)phosphors have the potential application as a red component in white light emitting diodes(WLEDs)with NUV or blue chips.展开更多
为了研究大型肉牛比利时蓝牛生长发育的遗传规律,筛选优异基因,试验基于Illumina Bovine SNP 50K芯片数据,采用PLINK软件对270头比利时蓝牛常染色体数据进行基因组长纯合片段(ROH)检测并基于选择信号分析,通过核苷酸多态性检测取前5%的...为了研究大型肉牛比利时蓝牛生长发育的遗传规律,筛选优异基因,试验基于Illumina Bovine SNP 50K芯片数据,采用PLINK软件对270头比利时蓝牛常染色体数据进行基因组长纯合片段(ROH)检测并基于选择信号分析,通过核苷酸多态性检测取前5%的单核苷酸多态性(single nucleotide polymorphism,SNP)位点,基于牛参考基因组(ARS-UCD1.2)对结果SNPs进行基因注释,对候选基因进行GO功能注释与KEGG信号通路富集分析,并计算染色体上ROH长度占基因组总长度的比例(FROH)。结果表明:在全部270个个体数据中共检测出1893个ROH片段,平均长度13.2311 Mb,平均FROH为0.0392;得到与生长发育相性状相关的基因有NEB、TET2、NEK11、NCKAP1、MYH15、EIF4A2、bta-miR-1248-1、DCAF8、PRORP、DOCK3、SYT15、MYEF2、ZDHHC13,与公牛生育能力相关的基因有CFAP61、DNAL1、BAG1。说明通过对比利时蓝牛生长发育性状相关分子标记的解析可以为比利时蓝牛遗传改良提供理论指导。展开更多
基金Project supported by the National Key R&D Program of China(2019YFA0709101)National Natural Science Foundation of China(52072364,51902305)the Fund for Creative Research Groups(21221061)。
文摘A series of novel red-emitting BaLiZn_(3)(BO_(3))_(3):Eu^(3+)phosphors were synthesized through the high temperature solid state reaction method.The phase composition,crystal structure,morphology and photo luminescence property of the BaLiZn_(3)(BO_(3))_(3):Eu^(3+)samples were systematically investigated.The phosphor can be efficiently excited by the near ultraviolet light(NUV)of 396 nm and blue light of 466 nm,and give out red light emission at 618 nm corresponding to the electric dipole transition(^(5)D_(0)→^(7)E_(2)).The optimal doping concentration of Eu^(3+)ions in BaLiZn_(3)(BO_(3))_(3)is determined to be about 3 mol%,and the concentration-quenching phenomenon arise from the electric dipole-dipole interaction.The temperature dependent luminescence behavior of BaLiZn_(3)(BO_(3))_(3):0.03 Eu^(3+)phosphor exhibits its good thermal stability,and the activation energy for thermal quenching characteristics is calculated to be 0.1844 eV.The decay lifetime of the BaLiZn_(3)(BO_(3))_(3):0.03 Eu^(3+)is measured to be 1.88 ms.These results suggest that the BaLiZn_(3)(BO_(3))_(3):Eu^(3+)phosphors have the potential application as a red component in white light emitting diodes(WLEDs)with NUV or blue chips.
