Laboratory of Biopolymers and Nanotechnology in Food (BioNano), Department of Agroindustrial Science and Technology, Federal University of Pelotas (UFPel), 96010-900 Pelotas, RS, Brazil.
Laboratory of Biopolymers and Nanotechnology in Food (BioNano), Department of Agroindustrial Science and Technology, Federal University of Pelotas (UFPel), 96010-900 Pelotas, RS, Brazil.
Int J Biol Macromol. 2024 Jan;254(Pt 1):127617. doi: 10.1016/j.ijbiomac.2023.127617. Epub 2023 Oct 23.
Starches from alternative sources, such as avocado seed, have potential for application in the encapsulation of essential oils. This study aimed to extract starch from avocado seeds and its use as wall material to encapsulate ginger essential oil (GEO), at different concentrations. The fibers were produced by electrospinning and evaluated by morphology, size, infrared spectra, thermogravimetric properties, contact angle, loading capacity, and antibacterial activity. The major compounds in GEO were α-zingiberene, β-sesquiphellandrene, α-farnesene, and α-curcumene. The starch-GEO fibers presented a higher diameter (∼553 nm) than those without GEO (345 nm). Encapsulation of GEO in starch fibers increased their thermal degradation temperatures from 165.8 °C (free GEO) to 257.6 °C (40 % GEO fibers). The starch-GEO fibers presented characteristic bands of their constituents by infrared spectra. Loading capacity ranged from 44 to 54 %. The fibers showed hydrophilic character, with a contact angle of <90°. Free GEO and the fibers with 50 % of GEO displayed antibacterial activity against Escherichia coli, proving the bioactivity of the starch-GEO fibers and its possible applicability for food packaging. Avocado seed starch showed to be a great wall material for GEO encapsulation.
来自替代来源的淀粉，如鳄梨种子，具有在封装精油中的应用潜力。本研究旨在从鳄梨种子中提取淀粉，并将其用作壁材来封装姜油精（GEO），浓度不同。通过静电纺丝生产纤维，并通过形态、尺寸、红外光谱、热重特性、接触角、负载能力和抗菌活性进行评估。GEO 的主要化合物为α-姜烯、β-倍半水芹烯、α-法呢烯和α-姜黄烯。含有 GEO 的淀粉-GEO 纤维的直径（∼553nm）高于不含 GEO 的纤维（345nm）。GEO 包封在淀粉纤维中增加了它们的热降解温度，从游离 GEO 的 165.8°C 到 40%GEO 纤维的 257.6°C。淀粉-GEO 纤维的红外光谱显示出其成分的特征带。负载能力在 44%到 54%之间。纤维具有亲水性，接触角<90°。游离 GEO 和含有 50%GEO 的纤维对大肠杆菌具有抗菌活性，证明了淀粉-GEO 纤维的生物活性及其在食品包装中的潜在应用。鳄梨种子淀粉是 GEO 封装的理想壁材。
