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Stability comparison of azadirachtin A and azadirachtin B

Zhixiang Zhang, Yongqing Tian, Cheng Dongmei, Hanhong Xu, Dingxin Jiang

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Abstract

Stored in methanol+water(55∶5,v/v)at(54±1) ℃ for 7 d and 14 d,degraded rates of azadirachtin A in neem seed methanol extracts were 33.59% and 54.45%,and degraded rates of azadirachtin B in same condition were 11.96% and 21.11%.Stored at(54±1) ℃ for 7 d and 14 d,degraded rates of azadirachtin A in neem seed methanol extracts were 82.35% and 94.79%,and degraded rates of azadirachtin B in same condition were 20.32% and 54.75%.Stored at(54±1) ℃ for 14 d,degraded rates of azadirachtin A and azadirachtin B in azadirachtin powder were 90.15% and 81.85%.Stored in methanol,methanol+water(9∶1,v/v)and methanol+neem oil(9∶1,v/v) at(54±1) ℃ for 7 d,degraded rates of azadirachtin A were 29.65%,44.99% and 12.76%,and degraded rates of azadirachtin B in same condition were 19.68%,25.65% and 9.67%.Neem oil could increase stability of azadirachtin A and azadirachtin B.

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What this paper is about

Stored in methanol+water(55∶5,v/v)at(54±1) ℃ for 7 d and 14 d,degraded rates of azadirachtin A in neem seed methanol extracts were 33.59% and 54.45%,and degraded rates of azadirachtin B in same condition were 11.96% and 21.11%.Stored at(54±1) ℃ for 7 d and 14 d,degraded rates of azadirachtin A in neem seed methanol extracts were 82.35% and 94.79%,and degraded rates of azadirachtin B in same condition were 20.32% and 54.75%.Stored at(54±1) ℃ for 14 d,degraded rates of azadirachtin A and azadirachtin B in azadirachtin powder were 90.15% and 81.85%.Stored in methanol,methanol+water(9∶1,v/v)and methanol+neem oil(9∶1,v/v) at(54±1) ℃ for 7 d,degraded rates of azadirachtin A were 29.65%,44.99% and 12.76%,and degraded rates of azadirachtin B in same condition were 19.68%,25.65% and 9.67%.Neem oil could increase stability of azadirachtin A and azadirachtin B.

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Available abstract

Stored in methanol+water(55∶5,v/v)at(54±1) ℃ for 7 d and 14 d,degraded rates of azadirachtin A in neem seed methanol extracts were 33.59% and 54.45%,and degraded rates of azadirachtin B in same condition were 11.96% and 21.11%.Stored at(54±1) ℃ for 7 d and 14 d,degraded rates of azadirachtin A in neem seed methanol extracts were 82.35% and 94.79%,and degraded rates of azadirachtin B in same condition were 20.32% and 54.75%.Stored at(54±1) ℃ for 14 d,degraded rates of azadirachtin A and azadirachtin B in azadirachtin powder were 90.15% and 81.85%.Stored in methanol,methanol+water(9∶1,v/v)and methanol+neem oil(9∶1,v/v) at(54±1) ℃ for 7 d,degraded rates of azadirachtin A were 29.65%,44.99% and 12.76%,and degraded rates of azadirachtin B in same condition were 19.68%,25.65% and 9.67%.Neem oil could increase stability of azadirachtin A and azadirachtin B.

Key concepts: Azadirachtin, Methanol, Chemistry, Meliaceae, Azadirachta, Pesticide, Biology, Botany

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