Banca de DEFESA: AGNES SOPHIA BRAGA ALVES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : AGNES SOPHIA BRAGA ALVES
DATE: 16/02/2024
TIME: 14:00
LOCAL: On-line
TITLE:

Valorization of HIE OxG hybrid crude palm oil: a diagnostic study of physicochemical characterization and oxidative stability.

KEY WORDS:

Elaeis guineensis; Elaeis oleifera; Review; Hybrid crude palm oil; Palm oil with a higher oleic acid; Schaal oven test.

PAGES: 145
BIG AREA: Ciências Agrárias
AREA: Ciência e Tecnologia de Alimentos
SUMMARY:

Hybrid crude palm oil (HCPO) interspecific from Elaeis guineensis and Elaeis oleifera (HIE OxG) was developed through genetic improvement techniques. This variety offers increased resistance to diseases and pests and higher bioactive compound levels in the oil. In this context, this study aims to understand HCPO HIE OxG regarding the diagnosis of knowledge, perception, and potential consumption by the Brazilian population, as well as its physicochemical and oxidative aspects. The study consisted of three stages. First, a prospective study on hybrid plant oils was conducted using the Espacenet® and Scopus databases, analyzing 24 patent documents and 187 articles. Agricultural and Biological Sciences were the main application areas for patents (79.2%) and articles (49.3%). The first patent document was registered in 1990, while the first article was in 1969. Most patents were filed via the Patent Cooperation Treaty (45%), followed by the United States (30%) and Canada (20%). The results indicated a growing trend in patenting and publishing articles on hybrid oils, providing insights into potential industrial, technological, and scientific research trends in the food, pharmaceutical, and biofuel sectors. In the second stage, an online survey was conducted using a semi-structured questionnaire with 16 questions applied on Google Forms. This study involved 1,065 participants from Brazil. Most responses (61.10%) did not correctly reflect the definition of this type of oil. Overall, the perception of HCPO was predominantly neutral. The research indicated that most participants (52.58%) expressed interest in trying HCPO, while 39.43% showed a medium to high likelihood of buying products with this oil, suggesting market acceptance potential in Brazil. Finally, the third stage aimed to evaluate the behavior of HCPO Unaué HIE OxG during accelerated storage in an oven (Schaal Oven Test). Tests were conducted on HCPO produced in Bahia on days 0, 3, 6, 9, 12, 15, and 18 at 65 ±5°C. Conventional crude palm oil (CPO) from Elaeis guineensis was used as a control, and these oils' composition and oxidative characteristics were analyzed. Regarding fatty acid composition, a higher oleic acid content (from 55.83 ± 0.01% to 56.23 ± 0.01%) was evidenced in HCPO. Over storage time, there was degradation of carotenoids (from 1117.4 ± 13.65 µg/g to 7.38 ± 0.97 µg/g), affecting the color of HCPO from a reddish-orange hue to a medium-dark yellow. HCPO showed better results than CPO, with a lower acidity index ranging from 0.94 ± 0.05% oleic acid to 1.10 ± 0.48% oleic acid. The generation of primary oxidation products, such as peroxides and conjugated dienes, exceeded acceptable limits after the third day of storage. Meanwhile, secondary oxidation products assessed by the thiobarbituric acid reactive substances (TBARS) test increased by 488% in HCPO, but conjugated trienes remained stable (from 0.79 ± 0.06 to 1.01 ± 0.07). After nine days of storage, the Deterioration of Bleachability Index (DOBI) indicated inferior quality for both OPBH and OPB. However, to ensure the absence of any oxidation product, OPBH and OPB remained stable for up to three days (equivalent to 3 months). Although OPBH HIE OxG has been studied since 1969, interest has grown in the last 11 years. With potential market acceptance, this oil reveals higher carotenoids and oleic acid levels than CPO. Future studies may investigate genetic aspects, physicochemical characteristics, their application in new products, and their health effects.

COMMITTEE MEMBERS:
Presidente - 3170723 - CAMILA DUARTE FERREIRA RIBEIRO
Interno - 1675374 - CLAUDIO VAZ DI MAMBRO RIBEIRO
Externa à Instituição - BRUNA APARECIDA SOUZA MACHADO - Senai