ZHEJIANG ZANCHENG LIFE SCIENCES LIMITED
專業從事生產和經營中間體和精細化工品
Chemintel Technology
結論體積分數為3%的百里香氛-丁香羅勒精油抗菌紙對草莓較好的保鮮效果。1001-3563(2018)19-0091-07 DOI:10.19554/j.cnki.1001-3563.2018.19.017 Effect of Antimicrobial Paper Coated with Thymus Vulgaris L. and Ocimum Gratissimum L.Essential Oil on Preservation of Strawberry LIU Guang-fa, SONG Hai-yan, LUO Wan-ru, TANG Xue-zheng, ZHANG Zheng-jian, ZHU Zi-rui (Tianjin University of Science & Technology, Tianjin 300222, China) ABSTRACT: The work aims to study a kind of antimicrobial paper coated with essential oils and its effect on the preservation of strawberry. Essential oils with strong antimicrobial activity against 4 kinds of microorganisms such as Botrytis cinerea were screened out from 5 kinds of natural plant essential oils such as Thymus vulgaris L., and their com-ponents were identified by GC-MS. The screened essential oils were coated on paper combined with polyvinyl alcohol to prepare antimicrobial paper. The antimicrobial activity of antimicrobial paper against tested microorganisms was tested by the method of fumigation, and the effect of the antimicrobial paper on the preservation of strawberry was studied. The results showed that the antimicrobial activity of Thymus vulgaris L. essential oil and Ocimum gratissimum L. essential oil against the 4 kinds of tested microorganisms was the strongest. The main components of Thymus vulgaris L. essential oil were thymol and carvacrol, and their peak area percentages in GC were 77.04% and 16.46%, respectively. The main components of the essential oil of Ocimum gratissimum L. were eugenol and β-caryophyllene, and their peak area percentages in GC were 77.95% and 18.80%, respectively. The antimicrobial paper with essential oil concentration of 4% (volume fraction, double coating, the same below) presented the strongest antimicrobial activity, followed by antimicro-bial paper with essential oil concentration of 3%. Antimicrobial paper with essential oil concentration of 3% presented the best effect on maintaining strawberry sensory quality, inhibiting strawberry decay and deferring the increase of the total number of colonies, which was significantly better than the antimicrobial paper with essential oil concentration of 4%, 2% and 1% respectively and the base paper (P<0.05). The effect of antimicrobial paper on total soluble solids of strawberry was not obvious. In conclusion, the antimicrobial paper coated with 3% (volume fraction) Thymus vulgaris.
2018年10月L.-Ocimum gratissimum L. essential oil has better effect on the preservation of strawberry. KEY WORDS: Thymus vulgaris L. essential oil; Ocimum gratissimum L. essential oil; antimicrobial paper; strawberry; preservation 食源性微生物不僅容易引起果蔬等食品的腐敗,還容易引起重大公共衛生問題,如何安全有效地延長食品的貨架壽命成為人們急需解決的問題。通過在食品包裝材料中加入綠色安全的抗菌劑,不僅可用于控制食品的腐敗,還可減少化學防腐劑的殘留。
一些研究表明,百里香精油、丁香羅勒精油、孜然精油等植物精油[1—2]對一些食源性微生物具有較強的抑制作用,研究人員還對其作用機理進行了研究。申莉莉[3]發現百里香精油可使金黃色葡萄球菌的細胞壁破損,柳冬雪[4]研究發現丁香精油可破壞細菌的細胞結構。紙質材料是一種廣泛使用的食品包裝材料,近年來的研究表明,基于植物精油的抗菌紙可用于食品防腐保鮮領域。Rodríguez[5]使用涂布機將添加肉桂精油的石蠟乳液涂布于80 g/m2紙張上制備出了一種具有抗菌功能的活性紙,在4 °C條件下可明顯降低草莓的腐爛率。
Mascheroni[6]以香芹酚為抗菌劑,蒙脫石為填料,制備涂布抗菌包裝紙,該包裝紙對大腸桿菌具有抑制作用。岳淑麗[7]等將肉桂精油β-環糊精包合物涂布于保鮮紙上制備出了一種抗菌紙,可延長圣女果的貨架壽命。利用植物源抗菌劑制備抗菌紙的研究僅處于初步階段,關于精油的復配、擴大抗菌紙的抗菌譜等方面未進行研究,目前也尚未見成熟的商業化產品。文中從百里香精油等5種植物精油中篩選出對灰霉等微生物具有抑制作用的精油,以篩選出的百里香精油、丁香羅勒精油為抑菌劑,將其復配并結合聚乙烯醇涂布于紙張上制得抗菌紙。研究抗菌紙對灰霉等微生物的熏蒸抑制作用,并探索抗菌紙對草莓防腐保鮮效果的影響,為天然綠色抗菌食品包裝紙的研究提供技術參考。
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