Investigation of physicochemical and microbial properties of chitosan-silver nanocomposite film with cumin (Cuminum cyminum L.) extract

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Khosroabadi Z.; NOURI L.

Title

Investigation of physicochemical and microbial properties of chitosan-silver nanocomposite film with cumin (Cuminum cyminum L.) extract

Author(s)

Khosroabadi Z. | NOURI L. | Issue Writer Certificate

Keywords

Chitosan / Silver Nanocomposite

Cumin

Antioxidant

Film

Abstract

Introduction: Edible coatings and Films are thin layers of edible compounds and biopolymers that are placed on the surface of food or among its compounds and their use is one of the methods. They are important for controlling physicochemical, microbial and physiological changes in food. One of the main functions of food packaging is to prevent or minimize the transfer of moisture between the food and the surrounding air. Therefore, in order to optimize the food environment and increase the shelf life of the food, water vapor permeability should be as low as possible. On the other hand, about 125 million tons of plastic are produced in the world, of which about 30 million tons are consumed in the packaging sector. Pollution from packaging materials produced from petroleum derivatives and problems caused by various methods of decontamination (such as burial, incineration and recycling) have attracted the attention of researchers in recent years to find suitable alternatives. For this type of packaging, it has been pointed out that Films and edible coatings can be the best alternatives in this regard. A new generation of food packaging includes substances with antimicrobial properties. This packaging technology can play an important role in increasing the durability of food and safety. Metal nanocomposites with a combination of metal nanoparticles and polymer Film have recently received a lot of attention. Among polymers, natural biodegradable polymers have been widely used that have advantages such as: edible, biocompatibility, attractive appearance, non-toxic, non-polluting and low cost. Among natural polymers, chitosan, as a cationic biopolymer, has been widely studied for various applications due to its excellent bioactivity and solubility in the aquatic environment and its resistance to oxygen penetration. As a result, it now has a variety of potential applications in medical products, food packaging Film, bone replacement and artificial skin. Among metallic nanoparticles, silver nanoparticles have long been known as antimicrobial substances. The antimicrobial activity of these nanoparticles may be related to several mechanisms that destroy the cell membrane structure. The aim of this study is to prepare a suitable packaging using Chitosan-Silver Film and to strengthen its antimicrobial and physicochemical properties by adding Cumin extract. Cumin cyminum is a plant of the Apiaceae family, annual, fragrant, hairless, herbaceous stem with bifurcated and sometimes trifoliate branches. The stem of the plant is grooved and has a peripheral metropolitan texture. Green Cumin fruit contains 2-5% essential oil, most of which consists of paracetamol, alpha and beta-p-nen, comic alcohol, comic aldehyde, alpha and beta-flandren, eugenol, prialaldehyde, alpha-terpineol and myrison. Material and methods: In this study, the physicochemical and microbial properties of silver nanocomposites (Ag) and chitosan (Ch) containing Cumin extract (E) were investigated. Initially, Cumin extract was extracted by extraction and extraction and water / ethanol extraction methods. The extract was tested for total phenol, tocopherol. The Film is made of Chitosan / Silver Nanocomposite (0. 15 mol / liter) with three concentrations of 0. 2, 0. 4 and 1% Cumin extract and is subjected to physicochemical tests (thickness measurement, water vapor passage rate, Film solubility, resistance Stretching, scanning electron microscopy (SEM) and increasing the length of the Film at the moment of rupture) and microbial (diameter of non-growth aura) were included. All experiments were performed in a completely randomized trial in three replications. The averages were compared with SPSS 23 software based on Duncan's tests at five percent. The resulting graphs were plotted in 2013 excel software and compared. Results: The results showed that the extract of green Cumin extracted by masonry method had high phenolic compounds (74. 17 mg / g galicacid / g dry weight) and tocopherol (24. 05 mg alphatochofrol / g dry weight). The results of the experiments showed that with increasing Cumin extract up to one percent of Film thickness (0. 93 mm), water vapor permeability rate (3. 81 g / s. m2, Film solubility (26. 45%) and increasing Film length in The moment of rupture (30. 21%) showed a significant increase (P <0. 05), but the tensile strength of the Film (16. 10 MPa) decreased with increasing concentration. As can be seen, in general, the addition of Cumin extract causes Decreased tensile strength of bituminous / silver biocomposite Films has been reduced. The results at 95% probability showed that the addition of the extract to the Film formulation significantly reduced the tensile strength and continued to increase with increasing the concentration of the extract. The lowest tensile strength of the Film was observed in 1% Cumin extract. The images of the electron microscope show that the surface of the control Films is perfectly smooth and smooth and free of any particles, while at the level of Films containing nanoparticles Nano-silver particles are clearly visible. Also, no accumulation and accumulation of nanoparticles is observed at the Film surface and they have a uniform distribution. The results of the microbial test are not clear. As the concentration of Cumin extract increased by up to one percent, the antimicrobial properties of Chitosan / Silver Nanocomposite increased. > Ashrashia has been general. Conclusion: Chitosan / Silver Biocomposite as a biodegradable Film with high physical properties has a high capability as a coating. Cumin extract is also rich in Antioxidants. The composition of Cumin extract has high Antioxidant properties as well as high antimicrobial activity. Cumin extract in combination with Cumin extract, it can be used as a coating to cover food. The effect of oral coating of chitosan / silver biocomposite with Cumin extract was studied in terms of physicochemical and microbial properties. At the end of the results, it was shown that the Film has a high performance for covering and storing food. Therefore, the results of this study can be used to cover food. The results showed that with increasing the percentage of extract, the antimicrobial properties of the prepared Films increased. In all antimicrobial tests, chitosan / silver biocomposite Film containing 1% extract had the highest inhibitory or non-growth diameter.

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APA: Copy

Khosroabadi, Z., & NOURI, L.. (2021). Investigation of physicochemical and microbial properties of chitosan-silver nanocomposite film with cumin (Cuminum cyminum L.) extract. JOURNAL OF FOOD RESEARCH (UNIVERSITY OF TABRIZ), 31(2 ), 35-50. SID. https://sid.ir/paper/953003/en

Vancouver: Copy

Khosroabadi Z., NOURI L.. Investigation of physicochemical and microbial properties of chitosan-silver nanocomposite film with cumin (Cuminum cyminum L.) extract. JOURNAL OF FOOD RESEARCH (UNIVERSITY OF TABRIZ)[Internet]. 2021;31(2 ):35-50. Available from: https://sid.ir/paper/953003/en

IEEE: Copy

Z. Khosroabadi, and L. NOURI, “Investigation of physicochemical and microbial properties of chitosan-silver nanocomposite film with cumin (Cuminum cyminum L.) extract,” JOURNAL OF FOOD RESEARCH (UNIVERSITY OF TABRIZ), vol. 31, no. 2 , pp. 35–50, 2021, [Online]. Available: https://sid.ir/paper/953003/en

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Scientific Information Database

ISSN: 2588-4824

Journal Paper

Investigation of physicochemical and microbial properties of chitosan-silver nanocomposite film with cumin (Cuminum cyminum L.) extract