Effects of Plant Density on the Economic Yield and Agronomic Characters of Perilla frutescens L.

Perilla frutescens L. is a traditional medicinal plant in china. In recent years, with more and more attention is paid to the nutritional and health values of Perilla frutescens L, it has become a potential medicinal and edible crop. Two Per- ilia frutescens cultivars, Qisu No.1 （oil type） and Qisu No.3 （leaf and seed-using type）, bred by Rapeseed Research Institute of Guizhou Academy of Agricultural Sciences, were used as test material for studying the effects of different planting density on the economic yield and agronomic characters of Perilla frutescens L. under moderate fertility level. The results showed the variation tendency of agro- nomic characters with the change of planting density was similar for the two Perilla frutescens cultivars. Among them, the plant height, main-stem nods, first effective branch length, first effective branch height, spikes per plant, and yield per plant were negatively related to the planting density; and main spike length and main- spike grains were positively related to the planting density. The effects of planting density on kilo-grain weight were not significant. The yield of the two cuitivars all increased first and then decreased with the increase of planting density. The re- gression analysis of planting density versus yield of Perilla frutescens L. was per- formed for obtaining the regression equations （Qisu No.l： y=54.046 5＋96.777 lx- 45.719 8x2, r=0.999 4; Qisu No.3：y=38.717 6＋42.111 3x-16.757 7x2, r=0.999 8）. Based on the regression equations, the optimal planting density for Qisu No.1 was 158 745 plants/hm2 with peak yield of 1 578.90 kg/hm2, and for Qisu No.3 was 188 745 plants/hm2 with peak yield of 977.55 kg/hm2. Under the optimal planting density, Qisu No.3 could also harvest 3 000 kg/hm2 of Perilla frutescens dry leaves and 2 400 kg/hm2 of Perilla frutescens stems. This research would provide an important reference for the promotion, high-yield cultivation and comprehensive utilization of Perilla frutescens L.

同位素标记敌百虫-甲氧基-D_6和敌敌畏-甲氧基-D_6的合成

以CD3OD为同位素源,经与三氯化磷酯化得到亚磷酸二甲酯,再进一步与三氯乙醛加成得到敌百虫-甲氧基-D6,碱解脱去氯化氢分子,重排后生成敌敌畏-甲氧基-D6。以消耗CD3OD计算稳定同位素标记敌百虫-甲氧基-D6和敌敌畏-甲氧基-D6提纯后总收率分别为57.7%和47.3%。产物经高效液相色谱(HPLC)、质谱(MS)和核磁(NMR)等仪器的鉴定为目标物质,化学纯度大于98.0%,同位素丰度高于98.0%,可作为食品安全领域检测用同位素内标试剂。

2-羟基-4-甲氧基二苯甲酮稀土配合物的合成与表征

以2-羟基-4-甲氧基二苯甲酮与稀土金属氯化物为原料、乙醇为溶剂,合成了6个2-羟基-4-甲氧基二苯甲酮稀土配合物,通过元素分析、IR、UV、TG/DTA等方法对其结构进行了表征。结果表明,所形成配合物的化学组成为RE(C14H11O3)3,金属离子与配体2-羟基-4-甲氧基二苯甲酮的化学计量比为1∶3;配体中羰基氧、邻位羟基氧与稀土金属离子配位;得到的配合物稳定性高,仍然具有吸收紫外线的能力。

邻乙氧基苯甲醛的合成

以廉价易得的邻羟基苯甲醛、伯胺及溴乙烷为原料,在温和条件下,采用两步简单反应合成了目标化合物邻乙氧基苯甲醛。通过优化实验,确定了合成的最佳工艺条件。与已见报道的方法比较,该方法的收率有大幅度提高,最大收率达到了83%。用1H NMR谱、13C NMR谱及元素分析对产物的结构进行了表征,结果与目标化合物相符。

钼钒氧簇二聚体[Ni(enMe)_2]_4{[Ni(enMe)_2][Ni(enMe)_2(H_2O)]_2[Mo_8^(Ⅵ)V_6^(Ⅳ)O_(38)(V~ⅤO_4)]_2}·8H_2O的合成与结构表征(英文)

在水热条件下合成了一例新型的多金属氧酸盐二聚物,[Ni(enMe)2]4{[Ni(enMe)2][Ni(enMe)2(H2O)]2[Mo8ⅥV6ⅣO38(VⅤO4)]2}.8H2O(1)(enMe=1,2-丙二胺),利用元素分析、红外光谱分析、粉末X射线衍射、热重分析和单晶X射线衍射表征了其结构。结果表明,化合物(1)属于单斜晶系,P2(1)/n空间群.晶胞参数为a=1.9685(4)nm,b=1.3549(3)nm,c=2.7039(5)nm,α=90°,β=93.94(3)°,γ=90°,V=7.195(2)nm3,Z=4,Dc=2.390g/cm3,Mr=2588.4,μ=3.195mm-1,F(000)=5012,最终R1=0.0743,wR2=0.1861.与此同时,(1)是第一个具有二帽-Keggin型钼钒氧簇的二聚体,它由过渡金属部分[Ni(enMe)2(H2O)]22+连接形成{[Ni(enMe)2][Ni(enMe)2(H2O)]2[Mo8ⅥV6ⅣO38(VⅤO4)]2}8-二聚阴离子.

含1,3,4-噁二唑与苯或吡啶共轭化合物的合成与表征

以间苯二甲酸和2,6-吡啶二甲酸为原料,经酯化、氨解、关环和取代4步反应合成了1,3-二(2-乙酸甲酯基硫醚-1,3,4-噁二唑)-苯和2,6-二(2-乙酸甲酯基硫醚-1,3,4-噁二唑)-吡啶,利用IR、1HNMR及MS对其结构进行表征。在304nm波长光激发下,1,3-二(2-乙酸甲酯基硫醚-1,3,4-噁二唑)-苯(1.0×10-5mol/L的DMF溶液)在357 nm发射荧光;在281 nm波长光激发下,2,6-二(2-乙酸甲酯基硫醚-1,3,4-噁二唑)-吡啶(1.0×10-5mol/L的DMF溶液)在354 nm发射荧光。结果表明,两种目标化合物均具有良好的荧光性能。

对称4,7-二取代邻菲罗啉的合成和表征

以邻苯二胺和乙氧亚甲基丙二酸二乙酯为起始原料,经取代、环合、水解、脱羧等反应合成得到4,7-二羟基邻菲罗啉,4,7-二羟基邻菲罗啉进一步氯化、氨化得到4,7-二氯邻菲罗啉和4,7-二胺基邻菲罗啉,各步产率较高,并用核磁共振、红外光谱、质谱进行了表征。