Undecenoic Acid

Secondary metabolites play important roles in the interactions between plants and insects.Given the complexities in these interactions, the role of secondary metabolism in plant-insect interaction is not fully understood.In this study, we identified 46 non-volatile organic compounds (NOCs) and 15 volatile organic compounds (VOCs) that differed significantly between the resistant and susceptible sugarcane lines.Phenolic acids constituted the majority of differential NOCs, with approx. 66.7% of these phenolic acids being more abundant in the susceptible line.Incorporation of phenoxyacetic acid and 4-methoxybenzaldehyde prolonged the pupal period of S. frugiperda larvae.Aromatics accounted for the largest proportion of differential VOCs in the susceptible line.Two aromatics, p-cymene and p-methoxystyrene, were found to attract S. frugiperda, with higher levels observed in the susceptible line.These results provide a basis for studying the role of NOCs and VOCs in the interaction mechanism between sugarcane and fall armyworm (S. frugiperda).

The synthesis and design of transition metal catalysts have attracted extensive attention in ethylene polymerizationIn this work, a series of α-diimine nickel catalysts (Ni1-Ni4) bearing ether substituents were designed and synthesized.The steric hindrance of these catalysts was systematically modulated by varying the ether groups, which directly influenced their ethylene (co)polymerization performances.These catalysts showed exceptionally high activities (up to 10⁷ g·mol^-1·h^-1).The resulting polyethylene displayed a broad range of branching densities (22 to 92/1000C) and high polymer mol. weights (up to 59.8x10⁴ g·mol^-1).Polyethylene produced by Ni1 and Ni2 exhibited outstanding mech. properties and elastic recovery performance.Furthermore, these catalysts efficiently catalyzed ethylene copolymerization with diverse polar monomers, yielding copolymers with incorporation ratios ranging from 0.24% to 1.43%.