Antioxidant Efficiency of Polyhydric Phenols in Photooxidation of Benzaldehyde

Moore, Douglas E.

doi:10.1002/jps.2600651008

Cited by 9 publications

(2 citation statements)

References 5 publications

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“…The scavenging rates for hydroxyl radicals and DPPH radicals were 30.19 and 40.44%, respectively. Because the phenolic hydroxyl groups were retained, the introduced aldehyde groups with antioxidant activity 45 increased the total number of active antioxidant functional groups in the modified gallic acid. In the prepared gelatin films, some of the aldehyde groups that were not involved in cross-linking enhanced the antioxidant activity of the film.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Biodegradable Anti-Ultraviolet Film from Modified Gallic Acid Cross-linked Gelatin

Guo

Tang

et al. 2021

ACS Sustainable Chem. Eng.

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The use of leather production waste to prepare degradable films is a sustainable production concept that can improve resource utilization and reduce the environmental pollution caused by traditional packaging waste. In this study, a biodegradable anti-ultraviolet film was prepared using gelatin obtained from tanning waste as the raw material and modified gallic acid as a cross-linking agent. The aldehyde group in the modified gallic acid reacts with the amino group in the gelatin molecule to form a stable covalent bond, which increases the cross-linking degree of the gelatin film. Compared with the conventional gelatin film, the modified gallic acid cross-linked gelatin film exhibited stronger tensile strength (6.357 MPa) and higher elongation at break (155.11%). The anti-ultraviolet capability of the film significantly increased as the conjugation system was enhanced owing to the formation of a Schiff base structure between the modified gallic acid and gelatin molecule, with strong UV absorption (T < 1%) in the range of 200–458 nm. The modified gallic acid cross-linked gelatin films also showed good antioxidant and antibacterial properties and excellent biodegradability, indicating its application potential in the packaging field.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Biodegradable Anti-Ultraviolet Film from Modified Gallic Acid Cross-linked Gelatin

Guo

Tang

et al. 2021

ACS Sustainable Chem. Eng.

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“…The dimerization reaction is shown in Figure 6. The photooxidation of drugs by UV radiations usually involves a free radical mechanism, as reported for benzaldehyde [59]. In the free radical chain process, a sensitizer abstracts a hydrogen atom from the drug molecule (see (24)).…”

Section: Photodimerization Reactionsmentioning

confidence: 99%

Photostability and Photostabilization of Drugs and Drug Products

Ahmad

Ahmed

Anwar

et al. 2016

International Journal of Photoenergy

120

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Photostability studies of drugs and drug products are an integral part of the product development process in the pharmaceutical industry. These studies are carried out to ensure quality, efficacy, and safety of the formulated products during manufacture, storage, and use. This review deals with the concept of photostability and related aspects and the literature available in the field. It highlights the role of the photochemistry in the photostability studies, describes the functional groups important for the photoreactivity of drugs, explains photophysical processes, and deals with the kinetics of photochemical reactions. The various modes of photodegradation of drugs with examples of selected compounds are presented. The biological consequences of the effect of light on the drug degradation are described. The photostability testing of drugs and drug products and the requirements under ICH guideline are discussed. Some information on the packaging requirements for the formulated products is provided. The various methods used for the photostabilization of solid and liquid dosage forms are also discussed.

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