Efeito do espaçamento sobre o desenvolvimento inicial de híbridos de Eucalyptus na Chapada do Araripe, Pernambuco.

Seção: Silvicultura e Produção de Biomassa

Caracterização de híbridos de melão do grupo inodorus desenvolvidos pela Embrapa Agroindústria Tropical.

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Estimativas da interação genótipo x ambiente (GA) em progênies de sorgo forrageiro desenvolvidas pelo IPA - Instituto Agronômico de Pernambuco.

Resumo: Em face da instabilidade climática do semiárido brasileiro, notadamente quanto à escassez e a distribuição errática das chuvas, o sorgo forrageiro que apresenta características de xerofilia detém a vantagem sobre a maioria das plantas forrageiras recomendadas para a região como suporte a pecuária, no atendimento de volumosos no período estival do ano. Foi utilizada a metodologia AMMI - ?Additive Main Effects and Multiplicative Interaction? (Análise de Efeitos Aditivos Principais e Interação Multiplicativa) que investiga a interação genótipo ambiente, e tem sido usada por vários autores e em diversas culturas. O objetivo deste trabalho foi avaliar o comportamento de 30 genótipos de sorgo forrageiro testados em seis ambientes do semi-árido de Pernambuco e de Alagoas usando a técnica AMMI visando recomendação. Os genótipos foram desenvolvidos pelo IPA a partir do método sequencial de pedigree, oriundos de cruzamentos e de autofecundações sucessivas até gerações avançadas. Através da análise infere-se que os genótipos G14, G22, G27 e G5 podem ser considerados estáveis e os genótipos G16 e G7 foram os que mais contribuíram com a interação GA

Production of ornamental sunflower irrigated with oilfield produced water in the Brazilian semiarid region.

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FACILE HYDROTHERMAL SYNTHESIS OF NIOBIUM PENTOXIDE SEMICONDUCTOR AND THEIR APPLICATION IN THE PHOTODEGRADATION OF DYES AND REDUCTION OF FREE FAT ACIDS IN WASTE OIL.

We report a facile hydrothermal method for the synthesis of niobium pentoxide (Nb2O5) under two different temperatures, 120 °C (Nb2O5-120) and 150 °C (Nb2O5-150). The obtained materials were characterized by structural, optical and morphological techniques. Also, the photocatalytic properties of the Nb2O5 samples were evaluated in two reactions under ultraviolet (UVC) irradiation: degradation of methylene blue (MB) and indigo carmine (IC) dyes; and esterification of free fatty acids (FFA) present in waste cooking oil (WCO). The Nb2O5 was formed at different temperatures of synthesis, and the increase in temperature did not cause significant changes in the structural and optical characteristics, but resulted in an increased surface area of the synthesized materials. Both synthesized materials showed excellent efficiency for dye photodegradation. The sample Nb2O5-150 presented the best performance for the MB photodegradation, with almost 85% of the removal efficiency. In this case, the adsorption of MB molecules on the surface of the material was high due to the favorable electrostatic interaction and also because of its high surface area. For the IC photodegradation, the adsorption was insignificant, and both samples presented approximately 100% of the removal efficiency. These materials were also promising for the reduction of free fat acids in waste oil by photoesterification

Relationships between body growth indices and environmental factors on the reproductive cycle of the Gymnodactylus geckoides Spix, 1825 (Squamata, Gymnophthalmidae) in Northeast Brazil

In this study, we analyzed the energy and reproductive cycles of female and male Gymnodactylus geckoides in the Caatinga area of northeast Brazil. We investigated whether these proxies of body condition, such as reproductive cells maturation and cellular structures changed in response to variation in abiotic and biotic factors (i.e., humidity, temperature, seasonality, body temperature, growing rate and gonad volume), using individuals stored under scientific conditions collected between September 2018 and December 2021. The condition factor showed an isometric growth pattern in the population studied. Meanwhile, the lipid, hepatic, and gonad factors correlated with body growth and showed monthly and seasonal variations, as well as reproductive cell maturation and cellular structure morphology. The cycles displayed constant replacement of energy reserves and mature reproductive cells, indicating constant and acyclic reproduction in G. geckoides. Energy reserves appear to be used for many reproductive activities, including meeting, gestation, and egg laying that occur at different frequencies during different periods in the dry and rainy seasons. Therefore, the reproductive cycle is likely to be strongly controlled by biotic factors, which are modeled using abiotic factors and environmental conditions (environmental patterns which proportionate greater resource availability). Our study is the first to investigate energy cycles and reproductive strategies in G. geckoides. It has shown that this species stores greater amounts of energy during the rainy season and then depletes these reserves during the dry period, since the rainy season correspond to the increase in energy consumption, mainly because of gestation and egg laying.Asociación Herpetológica Argentin