Carbon dioxide production in the oxidation of organic acids by Cerium(IV) under aerobic and anaerobic conditions

Butler, Kara; Steinbock, Oliver; Steinbock, Bettina; Dalal, N. S.

doi:10.1002/(sici)1097-4601(1998)30:12<899::aid-kin4>3.0.co;2-p

Cited by 6 publications

(4 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They probably play a role in the interaction that is supposed to lead to the formation of the six-membered chelate complex Ce(IV)–MA (see the ring structure in Figure ), which is the key rate-determining step of the overall oxidation process. This mechanism is the same for MA and MA-derived species, − and we can thus infer that reaction (R9) involving BrMA is also affected by the presence of concentrated K + and Cs + . This aspect is further explored below by means of numerical simulation.…”

Section: Resultsmentioning

confidence: 63%

Hofmeister Effect in Self-Organized Chemical Systems

et al. 2020

View full text Add to dashboard Cite

We studied the effect of spectator ions in the prototype of far-from-equilibrium selforganized chemical systems, the Belousov−Zhabotinsky (BZ) reaction. In particular, we investigated the specific ion effect of alkali metal cations, connoted for their kosmotropic and chaotropic properties. By means of combined experimental and numerical approaches, we could show a neat and robust evidence for the Hofmeister effect in this system. Spectator cations induce a marked increment of the induction period that preludes regular oscillations and decrease the oscillation amplitude following the sequence Li + < Na + ≪ K + ∼ Cs + . These ions affect the system kinetics by interfering in the interaction between the oxidized form of the catalyst and the organic substrate, responsible for resetting the BZ system to preautocatalytic (reduced) conditions. The specific ion effect on these key reactive steps is systematically characterized and correlated with different parameters which describe the interaction of the cations with the solvent.

show abstract

Section: Resultsmentioning

confidence: 63%

Hofmeister Effect in Self-Organized Chemical Systems

et al. 2020

View full text Add to dashboard Cite

show abstract

“…These results clearly indicate that the oxidation reaction of ascorbic acid was accompanied by substantial CO 2 generation. CO 2 production is a common feature of the oxidation reaction mechanisms of most organic acids (Butler, Steinbock, Steinbock, & Dalal, ). Accordingly, the organic acid‐based oxygen scavenger is advantageous because it does not reduce the package volume after application.…”

Section: Resultsmentioning

confidence: 99%

Development of a Sulfite‐Based Oxygen Scavenger and its Application in Kimchi Packaging to Prevent Oxygen‐mediated Deterioration of Kimchi Quality

Lee¹,

Jeong²,

Lee³

et al. 2018

Journal of Food Science

View full text Add to dashboard Cite

A sulfite-based oxygen scavenger (SOS) was developed with sodium metabisulfite and applied to kimchi packaging in an attempt to prevent oxygen-mediated kimchi quality degradation. The results of the oxygenscavenging capacity test showed that the SOS had a competitive oxygenscavenging performance in comparison with commercial oxygen scavengers. The kimchi was packaged with and without the SOS and stored over 12 weeks at 0 and 10°C for an SOS application test. The kimchi treated with the SOS showed a significantly lower (P < 0.05) headspace oxygen and carbon dioxide concentration and pressure inside the packages than the control. The pH and titratable acidity values indicated that the SOS did not retard the kimchi fermentation process. The Hunter L, a, and b values in the kimchi packaged with the SOS were significantly higher (P < 0.05) than those in the control. After 12 weeks of storage, the total aerobic bacteria counts were reduced by 1.32 and 2.97 log CFU/g, lactic acid bacteria counts were reduced by 2.22 and 4.42 log CFU/g, and total yeasts and molds counts were reduced by 1.76 and 3.04 log CFU/g at 0 and 10°C, respectively, by the SOS compared to those in the control. These results demonstrated that the developed SOS inhibited oxygen-mediated deterioration of the kimchi, but did not affect the kimchi fermentation. Therefore, our SOS can be used as an active food-packaging technology for kimchi quality preservation.Keywords: active packaging, kimchi packaging, oxygen absorber, oxygen scavenger, sodium metabisulfite Practical Application: A newly designed sulfite-based oxygen scavenger was applied in kimchi packaging, and it showed remarkable preventive effects on the kimchi quality deterioration caused by oxygen. Accordingly, it can be used as an active food-packaging technology to maintain kimchi quality during the storage period. Moreover, it can also be effectively utilized in the packaging of other high-moisture foods such as meat, fish, fruits, vegetables, and dairy products.

show abstract

“…Since this depends on the amount of reduced iron and on what is being oxidised in exchange, 15 we suggest that for printing purposes, a lower concentration of AFC is preferable. One opposing aspect here is that the AFC blocks less light than dichromate.…”

Section: Ammonium Ferric Citratementioning

confidence: 98%

“…This will again contribute to formation of CO 2 bubbles in the layer (Section 5.2). 15 We suggest a diluted stock solution of HCl as the best method for adjusting pH based on these results. While HCl at high concentrations is dangerous to work with, a diluted solution is both practical and safe.…”

Section: Ph Adjustmentmentioning

confidence: 99%

On ammonium ferric citrate as sensitiser for carbon printing

Kobayashi

2010

The Imaging Science Journal

View full text Add to dashboard Cite

Carbon printing uses dichromate salts for sensitisation. However, these are highly toxic. We have developed a method using ferric salts as a less toxic alternative. This method uses redox induced free radical polymerisation. The main problem in these systems is oxygen inhibition with insufficient polymerisation strength on the surface of the gelatine layer. This hinders a full tonal scale and the transfer step. We have solved this using an upper covering layer of agar-agar, thus creating anaerobic conditions on the main gelatine layer, enabling a full tonal scale. A further benefit of this method is that it does not require a formaldehyde-hardened gelatine layer on the final substrate for the transfer and the resulting image can be simply placed on a wide variety of surfaces. Using ammonium ferric citrate as sensitiser, we have explored some of the characteristics, and developed a basic practical working method for this system.

show abstract

Carbon dioxide production in the oxidation of organic acids by Cerium(IV) under aerobic and anaerobic conditions

Cited by 6 publications

References 12 publications

Hofmeister Effect in Self-Organized Chemical Systems

Hofmeister Effect in Self-Organized Chemical Systems

Development of a Sulfite‐Based Oxygen Scavenger and its Application in Kimchi Packaging to Prevent Oxygen‐mediated Deterioration of Kimchi Quality

On ammonium ferric citrate as sensitiser for carbon printing

Contact Info

Product

Resources

About