Catalyst and base-free, direct oxidation of chitin to lactic acid …
2024年9月1日 · Under the optimal conditions of 30 mg chitin, 2.1 mL water, 0.9 mL H 2 O 2 at 230 °C for 1.5 h, the lactic acid yield of chitin can reach 58.2 % and the total organic acid yield can reach 84.0 %. This work provides an efficient method for the resource utilization of chitin biomass.
Oxidative stress tolerance and antioxidant capacity of lactic acid ...
Endogenous production of H 2 O 2 and further reactive oxidants has been shown to be the main cause of oxidative stress in Lactobacillus johnsonii NCC 533 during aerobic growth. 4 LAB lack dedicated enzymes that can eliminate HO·, but have developed other selective strategies to limit HO· formation through eliminating H 2 O 2 and O 2– 9. Figure 1.
Catalyst and base-free, direct oxidation of chitin to lactic acid …
2024年9月1日 · We have developed a catalyst and alkali-free oxidation system of H 2 O 2 that can efficiently convert chitin biomass to lactic acid under relatively mild conditions. Under the optimal conditions, the maxmum yield of lactic acid reached 58.2 % along with the total organic acids yield of 84.0 %.
Green oxidation of bio-lactic acid with H O2 into Tartron. ion. 300 W high-pressure Hg lamp (λ=365 nm, I=80W/cm2) was used as the light source. Typical H2O2 photolytic procedure induced oxidation of lactic acid Photochemical oxidation reactions were conducted under irradiation of a 300 W high-pressure H.
Green oxidation of bio-lactic acid with H2O2 into tartronic acid …
2016年4月20日 · In this study, aqueous solutions of lactic acid were photochemically converted into TA via green oxidation by using hydrogen peroxide (H 2 O 2). Tartronic acid (TA) is a high value-added chemical widely used as a pharmaceutical product and a preservative; however, its synthesis technology is complicated and high cost.
Responses of lactic acid bacteria to oxygen - Oxford Academic
1987年9月1日 · Lactic acid bacteria exhibit an inducible oxidative stress response when exposed to sublethal levels of H 2 O 2. This response protects them if they are subsequently exposed to lethal concentrations of H 2 O 2 .
Responses of lactic acid bacteria to oxygen - ScienceDirect
1987年9月1日 · Lactic acid bacteria exhibit an inducible oxidative stress response when exposed to sublethal levels of H 2 O 2. This response protects them if they are subsequently exposed to lethal concentrations of H 2 O 2.
Catalyst and base-free, direct oxidation of chitin to lactic acid …
2024年6月11日 · Herein, we develop a catalyst and base-free, oxidative system for efficient convertion of chitin biomass to lactic acid and other organic acids with hydrogen peroxide (H 2 O 2) under relatively mild conditions, which has not been reported before.
Catalyst and Base-Free, Direct Oxidation of Chitin to Lactic Acid …
2024年6月18日 · The use of H2O2 only can efficiently convert chitin to organic acids in the absence of bases and catalysts. Under the optimal conditions of 30 mg chitin, 2.1 mL water, 0.9 mL H2O2 at 230 oC for 1.5 h, the lactic acid yield of chitin can reach 58.2% and the total organic acid yield can reach 84.0%.
Impact of H2O2 on the Lactic and Formic Acid Degradation in
The effect of catalyst surface area and TiO2 phase on the degradation rate of lactic acid (LA) and the decomposition of H2O2 was studied and discussed in regard to the active species generated. The intermediate products formed in the absence and presence of H2O2 were also an important factor in the comparison.