Cyanidin-3-Glucoside and Anthocyanin Rich Extracts in Retinal Health
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Questions and Answers

What is a key benefit of using anthocyanin extracts in food packaging?

  • Reduced production costs
  • Increased water solubility
  • Improved antioxidant capacity (correct)
  • Enhanced mechanical strength

    • Which of the following natural sources is NOT mentioned as a source of anthocyanin extract?

  • Black soybean
  • Rosemary (correct)
  • Purple rice
  • Mulberry

    • What is the primary mechanism by which anthocyanin extracts exhibit pH-dependent color changes?

  • Denaturation of the anthocyanin molecule
  • Hydrolysis of the anthocyanin molecule
  • Protonation of the anthocyanin molecule (correct)
  • Oxidation of the anthocyanin molecule

    • Which of the following applications is NOT a potential use of anthocyanin-based edible films?

    <p>Biomedical implants</p> Signup and view all the answers

    What is the function of chitosan in nanoparticles?

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

    What is a key advantage of using chitosan-based films in food packaging?

    <p>Improved biodegradability</p> Signup and view all the answers

    Which of the following health benefits is associated with the consumption of anthocyanin-rich foods?

    <p>All of the above</p> Signup and view all the answers

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

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

    Which of the following fruits is a natural source of Anthocyanin?

    <p>All of the above</p> Signup and view all the answers

    What is the primary mechanism by which anthocyanin extracts exhibit antioxidant activity?

    <p>Free radical scavenging</p> Signup and view all the answers

    Which of the following edible film formulations has been shown to exhibit improved antioxidant capacity?

    <p>Gelatin-sodium alginate with tea polyphenols</p> Signup and view all the answers

    What is the application of Anthocyanin extracts from purple sweet potato?

    <p>Intelligent pH indicator film</p> Signup and view all the answers

    What is the health benefit of Anthocyanin-rich extracts?

    <p>Inhibits oleic acid-induced hepatic steatosis in vitro</p> Signup and view all the answers

    What is the mechanism by which Cyanidin-3-glucoside attenuates visible light-induced retinal degeneration?

    <p>Activation of Nrf2/HO-1 pathway and NF-κB suppression</p> Signup and view all the answers

    What is the use of intelligent freshness indicator packaging?

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

    What is the effect of pH on Anthocyanin?

    <p>Induces color changes</p> Signup and view all the answers

    What is the primary benefit of using anthocyanins in food packaging?

    <p>To provide an indicator of food spoilage</p> Signup and view all the answers

    What is the effect of pH changes on anthocyanins?

    <p>It causes a change in the color of anthocyanins</p> Signup and view all the answers

    Which of the following is a natural source of anthocyanins?

    <p>Purple sweet potato</p> Signup and view all the answers

    What is the potential health benefit of anthocyanins?

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

    What is the composition of chitosan-based biodegradable functional films?

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

    What is the purpose of using chitosan in food packaging applications?

    <p>To provide an antioxidant function</p> Signup and view all the answers

    What is the characteristic of smart films used in food packaging?

    <p>They change color in response to pH changes</p> Signup and view all the answers

    What is the effect of cyanidin-3-glucoside on retinal damage?

    <p>It attenuates retinal damage</p> Signup and view all the answers

    What is the primary function of anthocyanin-based indicators in food packaging?

    <p>To indicate the freshness and quality of the packaged food</p> Signup and view all the answers

    Which of the following is a key advantage of using chitosan-based biodegradable films in food packaging?

    <p>Enhanced antioxidant activity and UV barrier properties</p> Signup and view all the answers

    What is the primary mechanism by which chitosan-based films exhibit antioxidant activity?

    <p>Scavenging of free radicals and reactive oxygen species</p> Signup and view all the answers

    What is the primary application of polymeric composite coatings in food packaging?

    <p>To enhance the shelf life and storage stability of food products</p> Signup and view all the answers

    Which of the following is a key characteristic of nanoparticle-based indicators used in food packaging?

    <p>High sensitivity and selectivity towards specific analytes</p> Signup and view all the answers

    What is the primary benefit of using antioxidant-rich extracts in food packaging?

    <p>To extend the shelf life and storage stability of food products</p> Signup and view all the answers

    Which of the following is a key application of biodegradable films in food packaging?

    <p>To reduce food waste and minimize packaging waste generation</p> Signup and view all the answers

    What is the primary function of smart films used in food packaging?

    <p>To monitor the freshness and quality of the packaged food</p> Signup and view all the answers

    What is the role of Nrf2/HO-1 pathway in cyanidin-3-glucoside's attenuation of visible light-induced retinal degeneration?

    <p>Activation of Nrf2/HO-1 pathway</p> Signup and view all the answers

    What is the primary function of intelligent freshness indicator packaging in food quality monitoring?

    <p>To indicate food freshness and safety</p> Signup and view all the answers

    What is the benefit of using chitosan as a stabilizing agent in nanoparticle-based indicators?

    <p>Increased stability of negatively charged nanoparticles</p> Signup and view all the answers

    What is the characteristic of anthocyanin-rich extracts from purple sweet potato?

    <p>Improved antioxidant capacity</p> Signup and view all the answers

    What is the primary application of polymeric composite coatings in food packaging?

    <p>To improve barrier function</p> Signup and view all the answers

    What is the effect of oleic acid on hepatic steatosis in vitro?

    <p>Induction of hepatic steatosis</p> Signup and view all the answers

    What is the benefit of using anthocyanin-based edible films in food packaging?

    <p>Enhanced antioxidant activity</p> Signup and view all the answers

    What is the primary mechanism by which anthocyanin-rich extracts exhibit antioxidant activity?

    <p>Scavenging of free radicals</p> Signup and view all the answers

    What is the primary objective of using intelligent freshness indicator packaging?

    <p>To monitor the quality of food products</p> Signup and view all the answers

    Which of the following biodegradable polymers has been used in the preparation of intelligent pH films?

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

    What is the primary benefit of using polymeric composite coatings in food packaging?

    <p>Improved barrier properties</p> Signup and view all the answers

    Which of the following nanoparticles has been used as an indicator in intelligent food packaging?

    <p>Nano-sized poly(methyl methacrylate-co-acrylamide) particles</p> Signup and view all the answers

    What is the primary mechanism by which anthocyanin extracts exhibit antioxidant activity?

    <p>Free radical scavenging</p> Signup and view all the answers

    Which of the following is a characteristic of smart films used in food packaging?

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

    What is the primary benefit of using biodegradable packaging materials?

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

    Which of the following is a potential application of anthocyanin-based edible films?

    <p>Food packaging</p> Signup and view all the answers

    Study Notes

    Cyanidin-3-glucoside and Retinal Health

    • Cyanidin-3-glucoside improves the barrier function of retinal pigment epithelium cells by attenuating endoplasmic reticulum stress-induced apoptosis.
    • Cyanidin-3-glucoside and its phenolic acid metabolites attenuate visible light-induced retinal degeneration in vivo via activation of Nrf2/HO-1 pathway and NF-κB suppression.

    Anthocyanin-Rich Extracts and Food Applications

    • Anthocyanin-rich extracts from blackberry, wild blueberry, strawberry, and chokeberry exhibit antioxidant activity and inhibitory effect on oleic acid-induced hepatic steatosis in vitro.
    • Anthocyanin extracts are used in intelligent pH indicator films composed of agar/potato starch and chitosan, which affect fig bioactive compounds and antioxidant capacity.

    Chitosan-Based Edible Films and Packaging

    • Chitosan is used as a stabilizing agent for negatively charged nanoparticles.
    • Chitosan-based edible films are developed for food applications, incorporating anthocyanin extracts from purple sweet potato and black soybean seed coat.
    • Chitosan-based biodegradable functional films are used for food packaging applications.

    Alternative Biodegradable Films

    • Furcellaran/gelatin hydrolysate/rosemary extract composite films are used as active and intelligent packaging materials.
    • Cellulose nanocrystal-reinforced chitosan-based UV barrier composite films are developed for sustainable packaging.
    • Smart biodegradable films based on chitosan/methylcellulose containing Phyllanthus reticulatus anthocyanin are used for monitoring fish freshness.

    Indicator Films for Food Quality Monitoring

    • Indicator films from carboxymethyl-cellulose/starch and purple sweet potato anthocyanins are prepared for monitoring fish freshness.
    • Halochromic and antioxidant capacity of smart films of chitosan/chitin nanocrystals with curcuma oil and anthocyanins are used for food quality monitoring.

    Chitosan-based Biodegradable Films

    • Chitosan is used to create functional films for food packaging applications, with antibacterial activity and UV barrier properties.
    • These films can be reinforced with cellulose nanocrystals, improving their mechanical and water barrier properties.

    Anthocyanin-based Intelligent Films

    • Anthocyanins are used as natural pH indicators in intelligent films for monitoring food freshness.
    • Films incorporating anthocyanins from purple sweet potato, blackberry, and other fruits can change color in response to pH changes, indicating spoilage.
    • Anthocyanin-rich extracts have antioxidant activity and can inhibit oleic acid-induced hepatic steatosis in vitro.

    Applications in Food Packaging

    • Intelligent films with anthocyanins and chitosan can monitor fish freshness and have potential applications in meat industry.
    • Biobased materials for active food packaging are being developed, including starch/PVA composite films with improved mechanical and water barrier properties.

    Cyanidin-3-Glucoside and Retinal Health

    • Cyanidin-3-glucoside, an anthocyanin, has been shown to attenuate retinal damage induced by 4-hydroxynonenal and visible light.
    • It improves the barrier function of retinal pigment epithelium cells by attenuating endoplasmic reticulum stress-induced apoptosis.

    Funding and References

    • This work was funded by the National Natural Science Foundation of China and the Young Elite Scientists Sponsorship Program.
    • Multiple references are cited from various journals, including Prog. Org. Coat., Innovat. Food Sci. Emerg. Technol., Polymers, and Food Res. Int.

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    Description

    This quiz covers the effects of cyanidin-3-glucoside and anthocyanin-rich extracts on retinal health, including their role in reducing retinal degeneration and promoting retinal cell function. Learn about the benefits of these bioactive compounds in food applications and eye health.

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