The Acute Toxicity of Two Organophosphorus Pesticide to Brachionus Plicatilis

本文研究了二种有机磷农药敌百虫和久效磷对褶皱臂尾轮虫(Brachionus plicatilis)的急性毒性和对褶皱臂尾轮虫孵化率的影响。试验结果表明:褶皱臂尾轮虫的孵化率随着有机磷农药浓度的增加而降低,孵化时间随之增加,敌百虫和久效磷对褶皱臂尾轮虫的48 h半致死浓度(LC50)分别是2.876 7 mg/L和0.0534mg/L。This paper reports that the acute toxicity of trichlorphos and monocrotophos to Brachionus plicatilis,and the effect of the hatching rate of these two organophosphorus pesticides on Brachionus plicatilis.The results showed that the hatching rate of Brachionus plicatilis reduced and the hatching time increased with the concentration of these organophosphorus pesticides increasing.The 48 h(LC_(50)) of trichlorphos and monocrctophos is 2.8767 mg/L and 0.0534 mg/L respectively.福建省青年科技人才创新项目(2003J003

α-羟基膦酸酯芳甲酸酯的合成、晶体结构和质谱裂解规律研究

α-羟基膦酸酯与各种取代苯甲酸或吡啶甲酸,通过酰氯或缩合剂的作用,合成了一系列的O,O-二烷基-α-苯基-α-(取代芳基甲酸酯基)-甲基膦酸酯的衍生物.它们的合成收率为61%～84%,这些化合物的结构经过核磁(1HNMR,13CNMR和31PNMR)、红外、质谱、元素分析或高分辨质谱确证,同时化合物C1的结构在晶体结构解析上进一步得到证实.利用多级质谱分析了化合物C2,C5和C8的质谱裂解规律,解释了重排离子的形成机制

Acute Toxicities of Two Organphosphorous Pesticides to Acartia sp.

本文研究了二种有机磷农药(敌百虫和久效磷)对纺锤水溞的急性毒性,结果表明,久效磷和敌百虫对纺锤水溞24h的TC_(50)分别为1.33 mg/L和0．044 mg/L,即久效磷对纺锤水溞毒性相对较低,而敌百虫对纺锤水溞有极高毒性,本文同时简单讨论了这二种有机磷农药对其它渔业水域中安全性。The acute toxicities of two organophosphorous pesticides(monocrotophos and trichlor- phon)to Acartia.sp.was studied in this paper.The results indicated that the 24h LC50 of monocroto- phos and trichlorphon to Acartia sp.were 1.33mg/L and 0.044mg/L respectively.That is,to Acartia sp.,monocrotophos was relatively low toxic,and trichlorphon was very high toxic.In the same time, the safety of these two organophosphorous pesticides in the fishery water are also discussed simply in this paper