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Guo Yongfu,Wang Yi,Chai Xiaohan,Xiang Huiming,Kong Weina,Ma Ruiyan 한국곤충학회 2022 Entomological Research Vol.52 No.9
Grapholita molesta (Busck) is a cosmopolitan fruit pest. The sex pheromones released by females have four components, namely (Z)-8-dodecenyl acetate (Z8–12:Ac), E8–12:Ac, (Z)-8-dodecen-1-ol (Z8–12:OH), and dodecanol (12:OH). This multichemical attractive system has been reported to induce various male behavioral responses, from arousal to directional flight, and enhance trapping. However, the specific male behaviors induced by individual component or component blend is unclear. This study investigated the effects of different combinations of these four components using electroantennogram, wind tunnel assays, and field tests on aspects of male behavioral performance. Our results showed that the (Z8–12:Ac + E8–12:Ac)- containing pheromones were mainly responsible for long-distance detection and close-distance location in males, including antennal detection of the stimulus, flight initiation, directional flight, and trapping. The addition of E8–12:Ac to Z8–12:Ac plays an important role in pheromone searching behavior of males in close range. The ternary component, Z8–12:Ac + E8–12: Ac + Z8–12:OH was crucial for capturing male moths, and 12:OH significantly increased the male catch. The addition of Z8–12:OH and 12:OH to Z8–12: Ac + E8–12:Ac plays an important role in completing the whole response sequence in field attraction. This study revealed that Z8–12:Ac + E8–12:Ac acts as a attractant to males, whereas Z8–12:OH, and 12:OH are the synergists that enhance male attraction in the sex pheromone blend.
Mingzhen Guo,Jiang He,Shuang Ma,Xiaohan Sun,Mingda Zheng 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2017 NANO Vol.12 No.4
In this paper, a novel colorimetric biosensor for Hg2+ is presented based on Hg2+ stimulated peroxidase-like activity of hollow porous gold nanoparticles (HPGNPs). Under mild conditions, HPGNPs show high catalytic activity toward the oxidation of 3, 3' , 5, 5' -tetramethylbenzidine (TMB) using H2O2 as an oxidant. The peroxidase-like activity of HPGNPs is "switched-on" selectively in the presence of Hg2+, which permitted a novel and facile colorimetric sensor for Hg2+. This method exhibits many merits like high selectivity and sensitivity. As low as 18.5 nM Hg2+ could be determined at a linear range from 0.5 x 10 -6 M to 50 x 10 -6 M. This method is successfully applied for the determination of total mercury content in tap water and Yellow River which indicates that the method has a great potential for the routine determination of Hg2+ in environmental samples.