应用高效液相色谱法(HPLC)定量分析结果表明,从海南省种植的印楝树(Azodirochtia indica A. Juss)上收获的种于中印楝素(Azadirachtin)含量为0.48％,甲醇提取物获得率为16.39％,其中含印楝素2.9％.国产印楝种子提取物对亚洲玉米螟(Oetri...应用高效液相色谱法(HPLC)定量分析结果表明,从海南省种植的印楝树(Azodirochtia indica A. Juss)上收获的种于中印楝素(Azadirachtin)含量为0.48％,甲醇提取物获得率为16.39％,其中含印楝素2.9％.国产印楝种子提取物对亚洲玉米螟(Oetri(?)a f(?)colis)和小菜蛾(P(?)tella xylostella)幼虫均有强烈的抑制生长发育作用活性。提取物馏分F_(5-6)(含印楝素0.883％)500ppm饲喂亚洲玉米螟4～5龄幼虫造成100％畸形死亡和变成“永久性幼虫”,113ppm时也有显著效果,2％处理小菜蛾四龄幼虫也使之100％畸形死亡。试验还发现不含印楝素的其它馏分对以上两种害虫也有不同程度的作用效果,值得进一步研究。展开更多
Non-Interactive Zero-Knowledge(NIZK for short) proofs are fascinating and extremely useful in many security protocols. In this paper,a new group signature scheme,decisional linear assumption group signature(DLAGS for ...Non-Interactive Zero-Knowledge(NIZK for short) proofs are fascinating and extremely useful in many security protocols. In this paper,a new group signature scheme,decisional linear assumption group signature(DLAGS for short) with NIZK proofs is proposed which can prove and sign the multiple values rather than individual bits based on DLIN assumption. DLAGS does not need to interact between the verifier and issuer,which can decrease the communication times and storage cost compared with the existing interactive group signature schemes. We prove and sign the blocks of messages instead of limiting the proved message to only one bit(0 or 1) in the conventional non-interactive zero-knowledge proof system,and we also prove that our scheme satisfy the property of anonymity,unlinkability and traceability. Finally,our scheme is compared with the other scheme(Benoitt's scheme) which is also based on the NIZK proofs system and the DLIN assumption,and the results show that our scheme requires fewer members of groups and computational times.展开更多
基金supported by the National High-Tech Research and Development Plan of China under Grant Nos.863-317-01- 04-99, 2009AA01Z122 (863)the Natural Science Foundation of Shenyang City of China under Grant No. F10-205-1-12
文摘Non-Interactive Zero-Knowledge(NIZK for short) proofs are fascinating and extremely useful in many security protocols. In this paper,a new group signature scheme,decisional linear assumption group signature(DLAGS for short) with NIZK proofs is proposed which can prove and sign the multiple values rather than individual bits based on DLIN assumption. DLAGS does not need to interact between the verifier and issuer,which can decrease the communication times and storage cost compared with the existing interactive group signature schemes. We prove and sign the blocks of messages instead of limiting the proved message to only one bit(0 or 1) in the conventional non-interactive zero-knowledge proof system,and we also prove that our scheme satisfy the property of anonymity,unlinkability and traceability. Finally,our scheme is compared with the other scheme(Benoitt's scheme) which is also based on the NIZK proofs system and the DLIN assumption,and the results show that our scheme requires fewer members of groups and computational times.
