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The aim of the current study was the valorization of hesperidin, the dominant flavonoid in citrus processing waste, by microwave-assisted synthesis of hesperidin-Mg complex, improving its antioxidant activity and insecticidal potential. Here we show, for the first time, that microwave-assisted synthesis of [Mg(hesp)2(phen)]OAc (1) (hesp: hesperidin, phen: phenanthroline) improve the reaction rate and yield. The nuclear magnetic resonance (NMR) experiments proved to be powerful tools for the identification of three isomers in metal complexes. Moreover, we explore the insecticidal potential of 1 and [Mg(phen)2(Isov)]OAc (2) (Isov : isovanillic acid) complexes against three insects. Complex 1 killed 80% of adults whitefly at 0.14 μmol L-1, and 2 76% at 0.36 μmol L-1. There was a total mortality of Spodoptera frugiperda with 2 at 0.39 μmol L-1, and 83% with 1 at 0.14 μmol L-1. Both have similar activity, and represent a novel group of insecticide for Bemisia tabaci and S. frugiperda; nevertheless, the benefits of both as Myzus persicae repellent require further evaluation.

Submitted by Alexandre Zirpoli Simões (zirpoli.simoes@unesp.br) on 2020-09-26T14:39:26Z No. of bitstreams: 1 Amoresi-2019_CeO2 photocatalise - acs.pdf: 7303340 bytes, checksum: a2aa75a8feacec9e7e665203c41d2939 (MD5) Approved for entry into archive by Pamella Benevides Gonçalves null (pamella@feg.unesp.br) on 2021-07-26T19:18:48Z (GMT) No. of bitstreams: 1 amoresi_rac_artigo_guara.pdf: 7303340 bytes, checksum: a2aa75a8feacec9e7e665203c41d2939 (MD5) Made available in DSpace on 2021-07-26T19:18:48Z (GMT). No. of bitstreams: 1 amoresi_rac_artigo_guara.pdf: 7303340 bytes, checksum: a2aa75a8feacec9e7e665203c41d2939 (MD5) Previous issue date: 2019-09-17 Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Currently, numerous properties of semiconducting oxides are correlated to their morphological characteristics resulting from their exposed surfaces. In the present work, the relationship between the following morphologies rod, bean, hexagon, and rod/cube of CeO2 with the exposure of (111), (110), (100), and (311) surfaces and the main charge carriers generated by the photochemical processes was investigated. This was done in regard to the degradation of ciprofloxacin and rhodamine-B. The initial stages of the degradation of the two types of molecules were evaluated, allowing the determination of where the charge carriers generated in the semiconductor preferentially acted on the molecules. Therefore, the active species in each photocatalyst were identified by scavenger tests and correlated to the computational simulations using the density functional theory. Accordingly, the relationships between the morphology, surface exposure in the particles, surface defects, photochemically generated species, and preferential attack on the micropollutant molecule were shown. Specific surface area analyses demonstrate an effective relationship between photocatalytic activity and the exposed surface of the particle. This will allow rationalization of the relation between the catalytic and electronic properties of semiconductor surfaces. Faculty of Engineering of Guaratingueta, São Paulo State University, UNESP Modeling and Molecular Simulations Group, Sao Paulo State University, UNESP Interdisciplinary Laboratory of Electrochemistry and Ceramics, LIEC, Department of Chemistry, Universidade Federal de Saõ Carlos, UFSCAR ∥ UFSCar, Department of Chemistry, Universidade Federal de Sao Carlos, UFSCAR, FAPESP: 2013/07296-2. 2016/07476-9. 2016/25500-4. 2017/19143-7. 2019/09296-6

Características biológicas de Trichogramma galloi Zucchi, 1988 foram avaliadas em laboratório onde esses parasitóides foram criados com ovos de Diatraea saccharalis (Lepidoptera, Pyralidae), com ou sem mel, e expostos a ovos do hospedeiro após 0, 6, 12, 24, 36, 48, 60, 72 e 84 horas da emergência. As taxas de parasitismo e de viabilidade mostraram-se elevadas para indivíduos que receberam alimento. A razão sexual não foi influenciada pelo alimento. O número de indivíduos por ovo somente mostrou diferença para aqueles adultos que não receberam alimento e permaneceram 6 horas sem ovos do hospedeiro. Conferindo o efeito da disponibilidade de ovos, somente a razão sexual, com ou sem mel, não mostrou diferenças. Os resultados mostram que T. galloi necessita de um suprimento de carboidratos e que o tempo pode influenciar a capacidade reprodutiva. Biological characteristics of Trichogramma galloi Zucchi, 1988 were evaluated in laboratory where these parasitoids were reared on eggs of Diatraea saccharalis (Lepidoptera, Pyralidae) with or without honey, and exposed to eggs of the host after 0, 6, 12, 24, 36, 48, 60, 72 and 84 hours of emergence. The parasitism rate and viability showed higher for individuals that received food. The sex ratio was not influenced by food. The number of individuals per egg only showed difference for those adults that did not receive food and stayed six hours without the host eggs. Checking the effect of the availability of eggs, only the sex ratio, with or without honey, did not show differences. The results show that T. galloi needs a carbohydrate supply and the time can influence the reproductive capacity.