Banca de DEFESA: JULIANA PEREIRA RODRIGUES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : JULIANA PEREIRA RODRIGUES
DATE: 19/05/2022
TIME: 09:00
LOCAL: meet.google.com/ahb-zukv-okz
TITLE:

Development and characterization of bionanocomposite based on alginate and ZnO nanoparticles for use in papaya (Carica Papaya L.) post-harvest

KEY WORDS:

nanocomposite, postharvest, zinc oxide, biopolymer, Carica papaya L.

PAGES: 81
BIG AREA: Ciências Agrárias
AREA: Ciência e Tecnologia de Alimentos
SUBÁREA: Ciência de Alimentos
SPECIALTY: Fisiologia Pós-Colheita
SUMMARY:

Papaya (Carica papaya L.) is a fruit rich in fiber, ascorbic acid (vitamin C), calcium and carotenoids, widely consumed worldwide. Due to a climacteric nature and high-water activity, papaya becomes very susceptible to post-harvest diseases, mainly those caused by fungi, and can reach 100% of losses, if control measures are not applied in the pre- and post-harvest. The use of edible coatings applied directly on fruits, is a post-harvest technology developed as an alternative to the use of fungicides, which leave pesticides residues and can promote resistant microorganisms. The use of natural biopolymers such as alginate to obtain edible coatings has shown good results due to its ability to increase the viscosity of aqueous solutions and to be efficient in the formation of gels and films, in addition to functioning as an excellent antimicrobial vehicle. The coatings formed from alginate, naturally have great solubility in water, which makes it difficult to use in certain functions, such as in use as a fruit cover. The alginate crosslinking process can decrease this solubility in water, improve the barrier and mechanical properties and increase the stability of these coatings. Zinc oxide is known to be a non-toxic material, released for human consumption and with high antimicrobial power, when in nanometer size, its contact surface increases, requiring a small amount to demonstrate their potential. In this sense, the objective of this project is develop an edible coating based on sodium alginate and zinc oxide nanoparticles, investigate the antifungal potential and its role on maintaining the quality and increasing the shelf life of papaya, in addition evaluate the effects of the crosslinking process on this coating. 

BANKING MEMBERS:
Presidente - 170.726.462-72 - OTNIEL FREITAS SILVA - EMBRAPA
Externo ao Programa - 061.825.607-54 - DAVY WILLIAM HIDALGO CHÁVEZ - UFRRJ
Externa à Instituição - ANA ELIZABETH CAVALCANTE FAI - UERJ