Physical properties, mechanical properties and antifungal activity of PLA bioplastic film containing Michelia alba oil on brown rice
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Abstract
The objective of the study was to investigate the physical properties of PLA-M. alba (wettability, color and surface of film), mechanical properties (tensile strength, young's modulus, elongation at break) and the effect of bioplastic (Polylactic acide: PLA) film impregnated with Michelia alba at 0 (control) to 0.3% against Aspergillus flavus, Aspergillus niger, Penicillium chrysogenum and natural mold on brown rice. In addition, the sensory evaluation of cooked brown rice packed inside a PLA-M. alba (0.1-0.5 %) was performed using a 9-point hedonic scale. The results showed that the increase of M. alba in the PLA was found to decrease the tensile strength, young's modulus, elongation at break, and lightness, but increasing the yellowness and lower wettability (P < 0.05). In addition, PLA-M. alba at 0.3 % could reduce the growth of A. flavus, A. niger, and P. chrysogenum on brown rice by 1.2-1.6 log 10 CFU g-1 and natural mold by 1.45 log 10 CFU g-1. The sensory test results indicated that the color, odor, flavor, and texture of cooked brown rice packed inside PLA-M. alba (0.1%-0.5%) were not significantly different from the control (P > 0.05), therefore PLA-M. alba has the potential to be used to prevent mold growth on brown rice and may help make brown rice more acceptable to the rice consumers.
Article Details
บทความที่ได้รับการตีพิมพ์เป็นลิขสิทธิ์ของ วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยอุบลราชธานี
ข้อความที่ปรากฏในบทความแต่ละเรื่องในวารสารวิชาการเล่มนี้เป็นความคิดเห็นส่วนตัวของผู้เขียนแต่ละท่านไม่เกี่ยวข้องกับมหาวิทยาลัยอุบลราชธานี และคณาจารย์ท่านอื่นๆในมหาวิทยาลัยฯ แต่อย่างใด ความรับผิดชอบองค์ประกอบทั้งหมดของบทความแต่ละเรื่องเป็นของผู้เขียนแต่ละท่าน หากมีความผิดพลาดใดๆ ผู้เขียนแต่ละท่านจะรับผิดชอบบทความของตนเองแต่ผู้เดียว
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