Antibacterial Activity of Chitosan and Anthocyanins
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Questions and Answers

What is the primary use of chitosan-based biodegradable functional films?

  • Food packaging applications (correct)
  • Pharmaceuticals
  • Antioxidant activity enhancement
  • Food quality monitoring

    • What is the purpose of indicator films made from carboxymethyl-cellulose/starch and purple sweet potato anthocyanins?

  • Detecting heavy metals
  • Creating biodegradable packaging
  • Enhancing antioxidant activity
  • Monitoring fish freshness (correct)

    • What is the role of curcuma oil in smart films of chitosan/chitin nanocrystals?

  • Enhancing antioxidant capacity (correct)
  • Improving biodegradability
  • Increasing halochromic activity
  • Reducing transparency

    • What is the potential health benefit of dietary anthocyanins?

    <p>Prevention and treatment of non-alcoholic fatty liver disease</p> Signup and view all the answers

    What is the primary component of polymeric composite coatings investigated for their antibacterial activity?

    <p>Chitosan</p> Signup and view all the answers

    What is the application of smart biodegradable films based on chitosan/methylcellulose containing Phyllanthus reticulatus anthocyanin?

    <p>Food quality monitoring</p> Signup and view all the answers

    What is the property of cyanidin-3-glucoside that makes it useful for reducing retinal damage?

    <p>Antioxidant activity</p> Signup and view all the answers

    What is the advantage of using chitosan-based UV barrier composite films for food packaging?

    <p>Sustainable packaging solution</p> Signup and view all the answers

    What is the primary application of intelligent starch/PVA films?

    <p>Simultaneous colorimetric indication and antimicrobial activity for food packaging</p> Signup and view all the answers

    What is the role of anthocyanin extracts in polymeric films?

    <p>To monitor the freshness of fish</p> Signup and view all the answers

    What is the advantage of using biodegradable polymers in food packaging?

    <p>They reduce the environmental impact of packaging waste</p> Signup and view all the answers

    What is the function of roselle anthocyanins in pH indicator films?

    <p>To monitor the freshness of pork</p> Signup and view all the answers

    What is the role of nano-sized poly(methyl methacrylate-co-acrylamide) particles in starch/PVA composite films?

    <p>To improve the water barrier properties of the films</p> Signup and view all the answers

    What is the advantage of using aqueous hibiscus extract as a natural pH indicator?

    <p>It is a biodegradable and natural alternative to synthetic indicators</p> Signup and view all the answers

    What is the primary application of polymeric gel in food packaging?

    <p>As a synthetic polymeric gel for food packaging applications</p> Signup and view all the answers

    What is the role of mulberry anthocyanin extracts in polymeric films?

    <p>To develop a novel colorimetric indicator film</p> Signup and view all the answers

    What is the effect of Cyanidin-3-glucoside on retinal pigment epithelium cells?

    <p>It attenuates endoplasmic reticulum stress-induced apoptosis</p> Signup and view all the answers

    What is the role of Nrf2/HO-1 pathway in Cyanidin-3-glucoside's action?

    <p>It activates Nrf2/HO-1 pathway</p> Signup and view all the answers

    What is the effect of Anthocyanin-rich extracts on oleic acid-induced hepatic steatosis?

    <p>It inhibits oleic acid-induced hepatic steatosis</p> Signup and view all the answers

    What is the application of intelligent freshness indicator packaging?

    <p>Food quality and safety monitoring</p> Signup and view all the answers

    What is the function of Chitosan in nanoparticle-based indicators?

    <p>Stabilizing agent for negatively charged nanoparticles</p> Signup and view all the answers

    What is the composition of the intelligent pH indicator film?

    <p>Agar/potato starch and anthocyanin extracts from purple sweet potato</p> Signup and view all the answers

    What is the application of polymeric composite coatings?

    <p>Not mentioned in the content</p> Signup and view all the answers

    What is the role of Nrf2/HO-1 pathway in Cyanidin-3-glucoside's action?

    <p>It is not involved in Cyanidin-3-glucoside's action</p> Signup and view all the answers

    What is the unique property of anthocyanins that makes them suitable for smart packaging?

    <p>pH-dependent chromatic change</p> Signup and view all the answers

    What is the main advantage of biodegradable packaging in the food industry?

    <p>Environmental sustainability</p> Signup and view all the answers

    What is the primary function of smart packaging in the food industry?

    <p>To provide real-time food quality monitoring</p> Signup and view all the answers

    What is the characteristic of anthocyanins that allows them to be used as indicators in smart packaging?

    <p>pH-dependent chromatic change</p> Signup and view all the answers

    What is the driving force behind the trend towards biodegradable packaging in the food industry?

    <p>Consumer preferences for sustainable packaging</p> Signup and view all the answers

    What is the significance of anthocyanin-based smart packaging films in the food industry?

    <p>To provide real-time food freshness monitoring</p> Signup and view all the answers

    What is a key benefit of using natural substances in biodegradable packaging?

    <p>Reduced environmental impact</p> Signup and view all the answers

    What is the main advantage of anthocyanin-based indicators in smart packaging?

    <p>High sensitivity to pH changes</p> Signup and view all the answers

    What is the primary function of anthocyanin-rich black plum peel extract in food packaging?

    <p>To act as a visual indicator of food spoilage</p> Signup and view all the answers

    What is the advantage of using chitosan-based composite films with TiO2 nanoparticles?

    <p>Improved water resistance and antimicrobial activity</p> Signup and view all the answers

    What is the primary application of pH-sensitive films based on starch/polyvinyl alcohol and food anthocyanins?

    <p>Monitoring food quality during transportation</p> Signup and view all the answers

    What is the role of silver nanoparticles in biodegradable films?

    <p>To impart antimicrobial activity to films</p> Signup and view all the answers

    What is the advantage of using biodegradable films based on chitosan and maize starch?

    <p>Reduced production cost and increased biodegradability</p> Signup and view all the answers

    What is the primary function of alginate production by Pseudomonas mendocina?

    <p>To produce biodegradable coatings for food packaging</p> Signup and view all the answers

    What is the advantage of using chitosan-based films with anthocyanin-rich extracts?

    <p>Enhanced antimicrobial activity and pH-sensitivity</p> Signup and view all the answers

    What is the primary application of kinetic investigation into pH-dependent color of anthocyanin?

    <p>Development of pH-sensitive indicator films</p> Signup and view all the answers

    Study Notes

    Investigation of Antibacterial Activity of Chitosan

    • Chitosan-based biodegradable functional films have been developed for food packaging applications
    • Chitosan-based UV barrier composite films have been reinforced with cellulose nanocrystals for sustainable packaging
    • Halochromic and antioxidant capacity of smart films of chitosan/chitin nanocrystals with curcuma oil and anthocyanins have been investigated

    Anthocyanins and their Applications

    • Anthocyanins are a type of polyphenol, a subgroup of flavonoids, with over 600 identified types
    • The six most common anthocyanidins are cyanidin, pelargonidin, delphinidin, petunidin, peonidin, and malvidin
    • Anthocyanins can be found in various chemical structures and colors depending on the pH of the solution
    • Cyanidin-3-glucoside is one of the most common anthocyanins in black rice, black bean, and many berries
    • Anthocyanins have been used in the development of smart packaging films that change color in response to changes in pH

    Smart Packaging Films

    • Smart packaging films have been developed to monitor food freshness and quality
    • These films are based on biodegradable materials such as chitosan, starch, and polyvinyl alcohol
    • Anthocyanin-rich extracts have been incorporated into smart packaging films to create pH-sensitive indicators
    • The films change color in response to changes in pH, indicating the freshness and quality of the packaged food

    Biodegradable Materials for Food Packaging

    • Biodegradable materials such as chitosan, starch, and polyvinyl alcohol have been used in food packaging applications
    • These materials are more environmentally friendly than synthetic materials
    • Biodegradable materials have been reinforced with nanomaterials such as cellulose nanocrystals and nanoparticles to improve their properties

    Food Quality and Safety Monitoring

    • Smart packaging films have been used to monitor food quality and safety
    • The films provide a visible indication of food freshness and quality, allowing consumers to make informed decisions
    • The use of biodegradable materials and natural substances such as anthocyanins has been driven by consumer demand for more environmentally friendly and sustainable packaging solutions

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    Related Documents

    Anthocyanin-Based pH-Sensitive Smart Packaging Films for Monitoring Food Freshness (Journal Article PDF)

    Description

    This quiz investigates the antibacterial activity of chitosan-based films and anthocyanins in food packaging and sustainable applications. It covers the development of biodegradable films and their halochromic properties.

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