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Compound Ⅱ and Ⅳ were obtained from this alga for the first time.The others were isolated from the Dictyotaceae algae for the first time.

化合物Ⅱ和Ⅳ系首次从该海藻中发现；其余化合物均为首次从网地藻科海藻中分离得到。

Compound 2 is isolated from Fagopyrum genus for the first time; compounds 1 and 5 are isolated from Fagopyrum tataricum Gaertn for the first time.

化合物2为首次从荞麦属植物中分离得到，化合物1、5为首次从苦荞麦中分离得到。

All compounds except 1 were isolated from this plant for the first time, and compound 5 was obtained from Leguminosae for the first time.

除化合物1以外，其余均是首次从铁甲草中分离得到，其中化合物5为首次在该科植物中发现。

Results The optimum conditions for the extraction of Peucedanum praeruptorum Dunn was as follow: 80 % alcohol was used as solvent, and 8 times the amount of alcohol was added, the mixture was kept refluxing for 1.0 h for the first time; then 6 times the amount of alcohol was added and the mixture was kept refluxing for 0.5 h for the second time; Four times the amount of alcohol for 0.5 h for the last time.

结果 白花前胡的最佳提取工艺为用质量分数80 %的乙醇提取3次，提取时间分别为1.0、0.5、0.5 h，3次所用溶媒量分别为药材质量的8、6、4倍；按照筛选出的最佳工艺条件进行的3次重复性实验，测得浸膏中8-甲氧基补骨脂素含量质量分数为0.094 %，折合1 g生药中含量为0.171 2 mg，与预测值基本一致。

Among them, I was a new compound, II～IV and VI～IX compounds were isolated from pholidota for the first time, X and XIV compounds were isolated from P.chinensis for the first time.

其中化合物I是新化合物；化合物II～IV、VI～IX为首次从该属植物中分离到；化合物X和XIV为首次从该种植物中分离到。

Coumarinyloxy)-6-methoxyl-7-hydroxycoumarin,β-sitosterol, 3-stigmast-5-en-3- 3 -D-Glucopyranoside . 3-(7-coumarinyloxy)-8-(7-hydroxycoumarin-8-yl)-7-hydroxycoumarin rhamnoside and Sucrose. Compound I , V, IX and XI were isolated from barks and stems of this plant for the first time and compound VI and VI were isolated from flowers of this plant for the first time, too.

共鉴定了其中11个化合物，根据理化性质和波谱数据鉴定确定为：丁香甙，结香甙C(Edgeworoside C Ⅱ)，7-羟基香豆素(7-hydroxycoumarin Ⅲ)，5，7-二甲氧基香豆素(5，7-dimethoxycoumarin Ⅳ)，卫矛醇，异吲哚-1，3-二酮1H-iso-Indole-1，3(2H-dione Ⅵ，西瑞香素(Daphnoretin Ⅶ)，β-谷甾醇(β-sitosterol Ⅷ)，胡萝卜甙(Daucosterol Ⅸ)，结香甙A(Edgeworoside A Ⅹ)和蔗糖。

All compounds above are isolated from Sonneratia ovata for the first time. Compounds 1, 5 and 7 are isolated from the Sonneratia for the first time.

以上化合物均为首次从该植物中分离得到，其中化合物1、5、7为首次从该属植物中分离得到。

ConclusionCompounds 1- 4 were obtained from this family for the first time and 5-7 were obtained from its spermoderm for the first time.

化合物1～4为首次从本属植物中分得，5～7为首次从文冠果种皮中得到。

1-10 are all isolated from the root of Urtica mairei Levl. for the first time. compounds 4,6-8 are isolated from Urtica plants for the first time.

化合物1~10均为首次从滇藏荨麻中分离得到，其中化合物4、6~8为首次从荨麻属植物中分离得到。

For the first time, ethanol leader Brazil got more than 50 percent of its total national automobile transportation fuels from bioethanol, eclipsing petroleum use for the first time in any major market..

第一次，巴西使用的生物乙醇占全国汽车运输燃料的百分之五十以上，超过了在任何主要市场首次石油的使用。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。