Banca de DEFESA: HANSHEYS MÉNARD

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : HANSHEYS MÉNARD
DATE: 26/02/2025
TIME: 10:00
LOCAL: Online via Google Meet
TITLE:

Development and effect of essential oil nanoparticles on the zootechnical parameters of Nile Tilapia (Oreochromis niloticus)

KEY WORDS:

Nanotechnology; nanoparticle; essential oils; zootechnical parameters; tilapia.

PAGES: 47
BIG AREA: Ciências Biológicas
AREA: Farmacologia
SUMMARY:

Fish farming is considered a very important sector due to the high demand for its products and also for its contribution to job creation. In Brazil, this sector is growing exponentially and generates a significant annual income. Tilapia is one of the species that has made this increase in Brazilian production possible. In view of this, new technologies are being included in some farming practices with the aim of improving the zootechnical parameters of fish. In this context, nanotechnology, as an expanding science, opens up the opportunity to use essential oils as natural phytogenic products as a food supplement that can help improve the zootechnical parameters of fish. Based on this, the main objective of our work is to develop and analyze the effect of essential oil nanoparticles on the zootechnical parameters of tilapia (Oreochromis niloticus). Thus, two essential oils were chosen: Sicilian lemon essential oil (Citrus limon) and tangerine essential oil (Citrus reticulata). The development of nanoparticles (NP) was carried out and then preliminary stability tests were performed at different temperatures (35 ± 2 °C, 40 ± 2 °C, 50 ± 2 °C, −20 ± 2 °C and 5 ± 2 °C), as well as the organoleptic and physicochemical characterization of the particles. These formulations were stored for 30 days and after storage, the results showed that there was no organoleptic change at 25, 35 and 5 °C, and the physicochemical parameters of NPCL and NPCR decreased significantly at all temperatures. However, these variations were less significant at 25 °C, with particle sizes from 40.43 to 35.08 for NPCL and from 42.28 to 38.12 for NPCR, a decrease in PDI from 0.518 to 0.275; 0.477 to 0.268 respectively, a zeta potential of -26.9 to -10.77 and of -22.57 to -16.43 and a pH of 5.2 to 5.1 and of 5.1 to 4.9 respectively. Then, five experimental diets were formulated with different concentrations of essential oil nanoparticles: 0% (control group), 0.50% and 1.00% of NPCL and NPCR, respectively. These formulations were then tested in the species Oreochromis niloticus and demonstrated significant results regarding final weight, weight gain rate, specific growth rate, daily growth index and condition factor.

COMMITTEE MEMBERS:
Interno - PABYTON GONCALVES CADENA
Externo ao Programa - 2654735 - DIJACI ARAUJO FERREIRA - UFRPEExterno à Instituição - YURI MATEUS LIMA DE ALBUQUERQUE - UFRPE