红皮洋葱新品种“科威红7号”的激光诱变选育

对红皮洋葱品种"西葱2号"的湿种子,采用五种剂量的He-Ne激光进行辐照,并从激光诱变"西葱2号"的变异后代中选育出早期抽薹率低、极早熟、较高产的红皮洋葱新品种(系)"昌激09-2"(科威红7号),与亲本相比早期抽薹率下降4个百分点,成熟期提前18天。     

Effective enhancement of the emission efficiency of tetraphenylporphyrin in solid state by tetraphenylethene modification

Evidently enhanced red emission efficiency from the solid state of tetraphenylporphyrin derivative was achieved by modification with tetraphenylethene units.     

On the (3,1)-choosability of planar graphs without adjacent cycles of length 5,6,7

A $(k,d)$-list assignment $L$ of a graph $G$ is a mapping that assigns to each vertex $v$ a list $L\left(v\right)$ of at least $k$ colors satisfying $|L\left(x\right)\cap L\left(y\right)|\le d$ for each edge $xy$. A graph $G$ is $(k,d)$-choosable if there exists an $L$-coloring of $G$ for every $(k,d)$-list assignment $L$. This concept is also known as choosability with separation. In this paper, we prove that any planar graph $G$ is $(3,1)$-choosable if any $i$-cycle is not adjacent to a $j$-cycle, where $5\le i\le 6$ and $5\le j\le 7$.     

红光照射对小鼠红细胞免疫功能的影响

应用红光照射仪对昆明鼠进行全身照射２０ｄ后取血,测定红细胞Ｃ３ｂ受体花环形成率和红细胞免疫复合物花环率,同时测定淋巴细胞转化率。结果表明红光照射习ＲＢＣ－Ｃ３ｂＲ花环形成率明显高于对照组,ＬＴ明显提高。说明红光能增强红细胞免疫功能和Ｔ细胞功能。     

烟草病虫害名录

本文记录了我国已知烟草病害56种.烟草害虫180种,烟草有害软体动物4种。     

氮化镓发光二级管蓝光转换材料的合成和发光性质

合成了Ce3＋掺杂的稀土石榴石结构复合氧化物体系(Y1-xGdx)3Al5O12、(Y1-xLux)3Al5O12、(Y1-xLax)3Al5O12、(Y1-xYbx)3Al5O12和(Y1-xTbx)3Al5O12.重点研究了(Y1-xGdx)3Al5O12:Ce3＋和(Y1-xLux)3Al5O12:Ce3＋两个体系的晶体结构和发光性质.这些体系都具有立方石榴石结构.(Y1-xGdx)3Al5O12:Ce3＋体系随Gd取代Y,晶胞参数略有增加.荧光光谱的发射波长随Gd浓度增加发生红移,当x=0.5时发射波长达到最大值（560 nm）,并不再随Gd含量增加而变化. (Y1-xLux)3Al5O12:Ce3＋的晶胞参数随 Lu取代Y而减小,但均保持了立方石榴石结构.荧光光谱的发射波长随Lu3＋的增加向短波方向移动,Lu3Al5O12:Ce3＋的发射波长的峰值为520 nm,体系的蓝移量是20 nm.利用分离发光中心的位形坐标模型对波长的移动作了定性解释.这两个体系的发射波长的可调节特性,对改善与氮化镓发光二极管(LED)匹配的蓝光转换材料的色坐标、色温等显色性质具有重要意义.     

二溴羧基偶氮胂光度法测定红色荧光粉中少量铕

应用二溴羧基偶氮胂（ＤＢＫＡＡ）测定红色荧光粉中少量铕，大量钇可用草酸掩蔽并以含钇的参比液消除其影响，测定了红色荧光粉，取得了满意结果。