Oxygen Scavengers: An Approach on Food Preservation

Cruz, Renato Souza; Camilloto, Geany Peruch; Pires, Ana Clarissa dos Santos

doi:10.5772/48453

Cited by 22 publications

(23 citation statements)

References 50 publications

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“…Inoculated bottles containing NBS medium amended with the three different oxygen scavengers and akaganeite powder were placed at 28-30 • C in an oven without further agitation. Two control sets without an oxygen scavenger (NORM) were used [58][59][60][61]. Vitamin C, also known as ascorbic acid, was selected as a cost-effective oxygen scavenger; however, it also can be utilised as a mild chelator and buffer under different conditions [62].…”

Section: Application Of Oxygen Scavengers On Biomineralisationmentioning

confidence: 99%

Microbial-Driven Stabilisation of Archaeological Iron Artefacts

James

Joseph

2021

CMD

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The instability of iron artefacts is rooted in salt contamination during burial and damages associated with exposure to alternative oxygen levels and high relative humidity once excavated. While a combination of chemical and mechanical treatments is utilised to remove the harmful ions (chlorides, sulphur species) and excess bulky corrosion products, these methods can be hazardous for conservation staff’s health, have limited success, or require extensive treatment times. Bio-based treatments provide a potentially greener alternative for removing damaging corrosion and creating biogenic mineral passivation layers, thus remediating concerns over costs, duration, and health and safety. Pseudomonas putida mt-2 (KT2440) is capable of utilising iron under certain conditions and for phosphating mild steel; however, applications have not been made in the cultural heritage sector. To address the potential of using bacteria for conservation purposes, Pseudomonas was assessed for both the bioremediation of salt contaminates and the production of a passivation layer suitable for iron artefacts, with specific conservation concerns in mind. Key factors for optimisation include the role of agitation, chloride content, and oxygen content on bacterial growth and biomineralisation. The initial results indicate a growth preference, not reliance, for NaCl and agitation with partial success of bioconversion of a mineral source.

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Section: Application Of Oxygen Scavengers On Biomineralisationmentioning

confidence: 99%

Microbial-Driven Stabilisation of Archaeological Iron Artefacts

James

Joseph

2021

CMD

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“…The action of ascorbic acid is based on its oxidation to dehydroascorbic acid. This reaction is accelerated by a transition metal that will work as catalyst, eg, the copper (Cruz et al, 2012). It may also be accelerated by the light.…”

Section: Figure 13mentioning

confidence: 99%

LDPE/PET laminated films modified with FeO(OH) × H₂O, Fe₂O₃, and ascorbic acid to develop oxygen scavenging system for food packaging

et al. 2019

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The iron compounds (iron(III) oxide-hydroxide monohydrate FeO(OH) × H 2 O, iron(III) oxide Fe 2 O 3 , and ascorbic acid) were used as oxygen scavengers modifiers in laminating of polymer films. This oxygen-scavenging system was coated on preselected films (low density polyethylene [LDPE] and polyethylene terephthalate [PET]) from which the laminates were formed. It presents the new form of composite material packaging that has the function of oxygen scavenging, which could be suitable for food packaging. The scope of the research included studies of morphology of oxygen scavengers by scanning electron microscope and their average particle size distribution measure by particle size analyzer, the effect of type, and concentration of these substances on viscosity of adhesive and seal strength of laminates.The Fourier-transform infrared spectroscopy (FTIR) of laminates was also performed to observe the potential interaction of functional groups of polyurethane adhesives with oxygen scavenger components. The most important ability of the developed system for oxygen scavenging was confirmed by measuring oxygen concentration (% vol) in a headspace with the prepared laminates. The concentrations of selected oxygen scavengers (4-6 wt%) and their combinations were studied. The most effective oxygen scavenger system integrated within the PE/PET composite film consists of 6 wt% ascorbic acid and 1 wt% FeO(OH) × H 2 O, where the oxygen concentration of 1.0 vol% (±0.20 vol%) was obtained after 15 days of storage. It was found that in this system the oxygen scavenging reaction occurs through ascorbate oxidation to dehydroascorbic acid, which is catalyzed by reduction of Fe 3+ to Fe2 + ions.

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“…We have modified the aqueous solution with which the medium was jacketed by adding the sodium salt of ascorbate (sodium ascorbate: Asc-Na) as an O 2 reducer. Ascorbate easily oxidizes to dehydroascorbic acid and is readily available as O 2 scavenger, dietary supplements, and food additives [9]. Therefore, the resulted multi-gas on-chip regulation system had high portability, cost performance, safety and disposability.…”

Section: Introductionmentioning

confidence: 99%

Microfluidic cell culture system with on-chip hypoxic conditioning

Takano

Tanaka

Futai

2013

2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

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We have demonstrated a portable microfluidic cell culture system with multi-gas (CO2 and O2) incubation which we can cultivate under hypoxia without bulky peripheral apparatus such as gas tanks, regulators, and flow controllers. The system contains a chip of 26 mm × 48 mm which is capable to diffuse CO2 and absorb O2 through a gas-permeable wall of nested media reservoir. The media was water-jacketed with aqueous solution containing 0.8 M sodium bicarbonate as CO2 supply and 1 M sodium ascorbate as oxygen scavenger. The partial CO2 pressure (pCO2) in media reservoir stabilized at least 10.2% ± 0.11% for at least 72 hours. The partial O2 pressure (pO2) in the media reservoir decreased to 4.2%. Portable on-chip hypoxic culture of SV40-T2 cells for 72 h was also demonstrated.

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Oxygen Scavengers: An Approach on Food Preservation

Cited by 22 publications

References 50 publications

Microbial-Driven Stabilisation of Archaeological Iron Artefacts

Microbial-Driven Stabilisation of Archaeological Iron Artefacts

LDPE/PET laminated films modified with FeO(OH) × H₂O, Fe₂O₃, and ascorbic acid to develop oxygen scavenging system for food packaging

Microfluidic cell culture system with on-chip hypoxic conditioning

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Oxygen Scavengers: An Approach on Food Preservation

Cited by 22 publications

References 50 publications

Microbial-Driven Stabilisation of Archaeological Iron Artefacts

Microbial-Driven Stabilisation of Archaeological Iron Artefacts

LDPE/PET laminated films modified with FeO(OH) × H2O, Fe2O3, and ascorbic acid to develop oxygen scavenging system for food packaging

Microfluidic cell culture system with on-chip hypoxic conditioning

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LDPE/PET laminated films modified with FeO(OH) × H₂O, Fe₂O₃, and ascorbic acid to develop oxygen scavenging system for food packaging