Abstract

Incorporating of fixed oils in biodegradable packaging has an important action on the polymer matrix and biological activities on phytopathogens. This study aimed to evaluate the incorporation of fixed oils from the seeds of Hymenaea stigonocarpa and Hymenaea courbaril in the arrowroot starch biofilm matrix, evaluating the physicochemical parameters of biodegradability and antifungal activity on Colletotrichum acutatum, Colletotrichum gloeosporioides, Aspergillus tubingensis, Aspergillus fumigatus, Aspergillus niger and Rhizopus stolonifer. Both fixed oils from Hymenaea seeds showed biological antioxidant activity in reducing DPPH. Biofilms showed increasing variation in thickness ranging from 0.23-0.43 mm and decreasing moisture content and solubility 15.01-5.14% and 51.07-34.10%, respectively, as oil concentrations increased. The oil concentration also reduced the transparency rate, a considerable variation between the color and biodegradability parameters. However, the biofilms presented a mass reduction of more than 90% for this test. Biofilms still demonstrate considerable antifungal activity for the evaluated phytopathogens. The seed oil of Hymenaea stigonocarpa and Hymenaea courbaril played important roles in developing biopolymer matrices and special biological activity on potential phytopathological agents of fruits and grains.

Highlights

  • Synthetic packaging is widespread in any industrial segment and even in products of “green” origin, these are produced from petroleum processing presents serious and potential environmental problems due to the extended stay in the mainly marine environment (Nielsen et al, 2020)

  • This study aimed to evaluate the incorporation of fixed oil from the seed of two species of Hymenaea stigonocarpa and Hymenaea courbaril and evaluate the characteristics of biofilms regarding structural antifungal characteristics on potential agricultural phytopathological agents

  • The physicochemical and antioxidant properties of the analyzed Hymenaea oils presented for specific gravity g mL-1 (20 °C) 0.9274±0.04a and 0.9280±0.06a, refractive index (25 °C) 1.44718±0.01a and 1.46237±0.03b, H. stigonocarpa and H. courbaril, respectively

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Summary

Introduction

Synthetic packaging is widespread in any industrial segment and even in products of “green” origin, these are produced from petroleum processing presents serious and potential environmental problems due to the extended stay in the mainly marine environment (Nielsen et al, 2020). The packaging industry increases its production by 8% a year, which negatively impacts accumulation, where 90% of all plastic produced is accumulated in the environment, and only 5% is recycled (Nor Adilah et al, 2018). The microplastics produced from the abrasion process can be inserted in both animal and human food, and studies carried out on the absorption of this material by humans generate an accumulation of 1 kg per year, which is toxic (Nor Adilah et al, 2018; Henry et al, 2019). According to Tavassoli-Kafran et al (2016) and Beikzadeh et al (2020), their growing application is due to the advantages such as being environmentally friendly, preventing losses of moisture, aromas, colors, gas barrier attributes (O2, CO, CO2 and C2H4), reduction enzymatic of spoilage, microbial contamination; they could extend the shelf life of main food products with no side effects by inhibiting the dehydration, browning, and oxidative rancidity

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