Development of time-pH indicator nanofibers from natural pigments: An emerging processing technology to monitor the quality of foods

Terra, Ana Luiza Machado; Moreira, Juliana Botelho; Costa, Jorge Alberto Vieira; Morais, Michele Greque de

doi:10.1016/j.lwt.2021.111020

Cited by 39 publications

(19 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The change in color (inserted in Figure 8) and fluorescence of the anthocyanin-milk samples as a function of pH raises the possibility of using this natural dye as a colorimetric and/or fluorimetric pH-biosensor probe [29,30,41]. Several applications of natural dyes as possible biosensors for adulterated pH-dependent foods have been reported (Table 3) [30,41,[72][73][74][75]. For applications of natural dyes as possible pH-biosensors, similar behavior of τ and ADF as a pH function were obtained (Figure 9a,b).…”

Section: Resultsmentioning

confidence: 99%

Fluorescence Quantum Yields and Lifetimes of Aqueous Natural Dye Extracted from Tradescantia pallida purpurea at Different Hydrogen Potentials

Lima

Lourenço²,

Thomaz³

et al. 2023

Photochem

View full text Add to dashboard Cite

In this work, we monitored the fluorescence quantum efficiency (η) and the fluorescence lifetime (τ) of natural dye extracts from the leaves of Tradescantia pallida purpurea. The natural dye was extracted from leaves in aqueous solutions as a function of the potential of hydrogen (pH). The η was determined from conical diffraction (CD) pattern measurements due to thermally-driven self-phase modulation. The fluorescence spectra and time-resolved fluorescence measurements corroborate the CD results, and the average η » 0.28 and τ » 3.1 ns values were obtained in the pH range 3.96–8.02. In addition, the extracted natural dye was tested as a possible colorimetric and/or fluorometric pH indicator in milk.

show abstract

Section: Resultsmentioning

confidence: 99%

Fluorescence Quantum Yields and Lifetimes of Aqueous Natural Dye Extracted from Tradescantia pallida purpurea at Different Hydrogen Potentials

Lima

Lourenço²,

Thomaz³

et al. 2023

Photochem

View full text Add to dashboard Cite

show abstract

“…Moreira et al (2018), could successfully use the intense blue coloured pigment phycocyanin from Spirulina within poly lactic acid (PLA) / poly ethylene oxide (PEO) ultrafine nanofibers by electrospinning, while encapsulation of its biomass in polymer nanofibers is also considered as a promising application for developing a colorimetric pH indicator as also performed by Kuntzler et al (2020). Usage of Spirulina within intelligent packaging has been going on that, recent research by Terra et al (2021) was performed for visual estimation of pH changes depending on quality loss. Time-pH indicator nanofibers were manufactured to monitor the quality of foods by using curcumin and quercetin obtained from vegetable plants and phycocyanin from Spirulina.…”

Section: Other Natural Colour Indicatorsmentioning

confidence: 99%

Usage of Natural Colour Indicators in Packaging Materials for Monitorization of Meat Freshness

Özkaya

Daǧbaǧlı

2021

Turkish JAF Sci.Tech.

View full text Add to dashboard Cite

Food packaging has an important role in protecting food against physical, chemical, and biological hazards during storage and distribution and in informing the consumer about the product. The packaging of foods that susceptible to chemical / microbiological spoilage especially such as meat, hence limited storage time, is even more important than other foods. In addition, the tendency of health-conscious consumers to be a part of real-time controls and monitoring food safety has led to the widening of this packaging perception. Hence, there have been innovative studies in recent years, especially aiming real time monitorization of freshness indicators. The focus of these studies is “colour indicators” used in the production of intelligent indicator films and colorimetric sensors within specific matrices to be integrated into packaging materials. The colour indicators change colour in the presence of certain metabolites released in food spoilage, which allows freshness to be determined. Colour substances used for this purpose can be natural or synthetic. Hence, natural pigments such as anthocyanin, curcumin, etc. have been more preferrable since being harmless to the health as well as increasing tendency of consumers to utilization from natural resources. In this review, information about natural colour indicators and studies in which these indicators are used to determine the freshness of meat in real time and visually are given.

show abstract

“…To achieve this goal, drug release profiles must be modified regardless of the drug administration routes [6][7][8][9][10][11]. During the past half a century, both pharmaceutical technologies and excipients broadly expanded to create novel functional materials for realizing a wide variety of modified release profiles of active ingredients, which show potential applications in drug delivery, food engineering, cosmetics, and so on [12][13][14][15][16][17][18][19]. These profiles typically include an immediate release (or pulsatile release or rapid/fast release) [20][21][22][23], sustained release [24][25][26][27][28][29], delayed release [30], biphasic release [31][32][33], and multiple-stage release in terms of the drug release rate.…”

Section: Introductionmentioning

confidence: 99%

Electrospun Structural Hybrids of Acyclovir-Polyacrylonitrile at Acyclovir for Modifying Drug Release

Guo

Zhang

et al. 2021

Polymers

View full text Add to dashboard Cite

In traditional pharmaceutics, drug–crystalline nanoparticles and drug–polymer composites are frequently explored for their ability to modify drug release profiles. In this study, a novel sort of hybrid with a coating of acyclovir crystalline nanoparticles on acyclovir-polyacrylonitrile composites was fabricated using modified, coaxial electrospinning processes. The developed acyclovir-polyacrylonitrile at the acyclovir nanohybrids was loaded with various amounts of acyclovir, which could be realized simply by adjusting the sheath fluid flow rates. Compared with the electrospun composite nanofibers from a single-fluid blending process, the nanohybrids showed advantages of modifying the acyclovir release profiles in the following aspects: (1) the initial release amount was more accurately and intentionally controlled; (2) the later sustained release was nearer to a zero-order kinetic process; and (3) the release amounts at different stages could be easily allocated by the sheath fluid flow rate. X-ray diffraction results verified that the acyclovir nanoparticles were in a crystalline state, and Fourier-transform infrared spectra verified that the drug acyclovir and the polymer polyacrylonitrile had a good compatibility. The protocols reported here could pave the way for developing new types of functional nanostructures.

show abstract

Development of time-pH indicator nanofibers from natural pigments: An emerging processing technology to monitor the quality of foods

Cited by 39 publications

References 49 publications

Fluorescence Quantum Yields and Lifetimes of Aqueous Natural Dye Extracted from Tradescantia pallida purpurea at Different Hydrogen Potentials

Fluorescence Quantum Yields and Lifetimes of Aqueous Natural Dye Extracted from Tradescantia pallida purpurea at Different Hydrogen Potentials

Usage of Natural Colour Indicators in Packaging Materials for Monitorization of Meat Freshness

Electrospun Structural Hybrids of Acyclovir-Polyacrylonitrile at Acyclovir for Modifying Drug Release

Contact Info

Product

Resources

About