Natural Polyphenol and Flavonoid Polymers

Heim, Kelly C.

doi:10.1002/9781118445440.ch2

Cited by 2 publications

(2 citation statements)

References 148 publications

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“…In considering the possibilities offered by the presence of antioxidants in the formulation of polymer materials, it is easy to identify that the algal extracts are active materials and that their contribution to the extension of durability is related to protection against oxidation by the scavenging of radicals [ 81 ]. Relevant components in extracts of Ascophyllum nodosum [ 82 ] are possible antioxidants with different stabilization efficiencies.…”

Section: Resultsmentioning

confidence: 99%

Stabilization Activity of Kelp Extract in Ethylene–Propylene Rubber as Safe Packaging Material

Zaharescu¹

2023

Polymers

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This paper presents the stabilization effects of the solid extract of kelp (Ascophyllum nodosum) on an engineering elastomer, ethylene–propylene copolymer (EPR), which may be used as packaging material. Progressive increase in additive loadings (0.5, 1, and 2 phr) increases the oxidation induction time for thermally aged rubber at 190 °C from 10 min to 30 min for pristine material and modified polymer by adding 2 phr protection powder. When the studied polymer is γ-irradiated at 50 and 100 kGy, the onset oxidation temperatures increase as a result of blocking the oxidation reactivity of free radicals. The stabilization effect occurs through the activity of alginic acid, which is one of the main active components associated with alginates. The accelerated degradation caused by γ-exposure advances more slowly when the kelp extract is present. The OOT value for the oxidation of EPR samples increases from 130 °C to 165 °C after the γ-irradiation of pristine and modified (2 phr of kelp powder) EPR, respectively. The altered oxidation state of EPR samples by the action of γ-rays in saline serum is faster in neat polymer than in stabilized material. When the probes are placed in physiological serum and irradiated at 25 kGy, the OOT value for neat EPR (145 °C) is much lower than the homologous value for the polymer samples protected by kelp extract (153 °C for the concentration of 0.5 phr, 166 °C for the concentration of 1 phr, and 185 °C for the concentration of 2 phr).

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Section: Resultsmentioning

confidence: 99%

Stabilization Activity of Kelp Extract in Ethylene–Propylene Rubber as Safe Packaging Material

Zaharescu¹

2023

Polymers

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“…A specific metabolomics investigation of wine or oenomics, focused on phenolic compounds or polyphenomics, has been proposed. 17 In the current study, we describe the development of a shotgun polyphenomics analysis of wine by ultra high performance liquid chromatography-electrospray ionization-quadrupole-time-of-flight-mass (UHPLC-ESI-Q-TOF). Preliminary application to the discrimination of different commercial red wines is also presented.…”

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confidence: 99%

High-Throughput OEnomics: Shotgun Polyphenomics of Wines

Delcambre

Saucier

2013

Anal. Chem.

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Red wine is a complex mixture of organic compounds including polyphenols and the use of ultra high performance liquid chromatography-electrospray ionization-quadrupole-time-of-flight-mass spectrometry (UHPLC-ESI-Q-TOF-MS) is a promising technique to better understand its quality and authenticity. To optimize the characterization of red wine, we developed an original and fast method that represents the first shotgun polyphenomics analysis of wine. We show that our new method yields significantly more information than previous fast methods such as direct injection-ESI-MS of wine, with the identification of 103 compounds in 2 min. As a first application, we show that the use of a specific selected ion ratio demonstrates significant differences between Pinot Noir, Merlot, and Syrah wine spectra in a preliminary study.

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Natural Polyphenol and Flavonoid Polymers

Cited by 2 publications

References 148 publications

Stabilization Activity of Kelp Extract in Ethylene–Propylene Rubber as Safe Packaging Material

Stabilization Activity of Kelp Extract in Ethylene–Propylene Rubber as Safe Packaging Material

High-Throughput OEnomics: Shotgun Polyphenomics of Wines

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