Formaldehyde degradation filter via recombinant E.coli enzyme

Tahara, Yusuke; Kanemaru, Masashi; Deguchi, M.; Ozawa, Shoji; Arar, J.

doi:10.1109/apbme.2003.1302606

Cited by 2 publications

(2 citation statements)

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“…Although promising, room-temperature degradation of FA is only possible with some expensive noble-metal catalysts − and their efficiency was not proven at a low FA concentration (<ppm). , (Photo)catalytic oxidation methods are however nonselective to FA and degrade any organic compounds with the formation of radicals able to react with other substances with the risk of formation of harmful byproducts. , On the other hand, the enzymatic bioremediation is highly selective to FA and can convert this waste into nontoxic products under ambient conditions. In this field, compost extracts, i.e., FA-degrading microorganisms like fungi , or bacteria, or purified specific enzymes were employed for FA abatement . However, maintaining the stability and activity of the biocatalyst is challenging under gaseous conditions, , which currently limits their use to FA waste water remediation.…”

Section: Introductionmentioning

confidence: 99%

“…In this field, compost extracts, i.e., FA-degrading microorganisms like fungi , or bacteria, or purified specific enzymes were employed for FA abatement . However, maintaining the stability and activity of the biocatalyst is challenging under gaseous conditions, , which currently limits their use to FA waste water remediation. Besides, the FA adsorption in (in)organic matrices is often exploited as a low-cost and simple alternative technique for VOC abatement.…”

Section: Introductionmentioning

confidence: 99%

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Introducing Polyhydroxyurethane Hydrogels and Coatings for Formaldehyde Capture

Bourguignon

Grignard

Detrembleur

2021

ACS Appl. Mater. Interfaces

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Formaldehyde (FA) is a harmful chemical product largely used for producing resins found in our living spaces. Residual FA that leaches out the resin contributes to our indoor air pollution and causes some important health issues. Systems able to capture this volatile organic compound are highly desirable; however, traditional adsorbents are most often restricted to air filtration systems. Herein, we report novel waterborne coatings that are acting as a FA sponge for indoor air decontamination. These coatings, of the poly(hydroxyurethane) (PHU) type, rich in primary amine groups, are prepared by the polyaddition of a hydrosoluble dicyclic carbonate to a polyamine in water at room temperature under catalyst-free conditions. We highlight the importance of the choice of the polyamine on the curing rate of the formulation and on the FA capture ability of PHU. The excellent FA capturing ability of the best candidate is rationalized by investigating the action mode of the polyamine used to construct PHUs. With poly(vinyl amine), FA is covalently and permanently bound to PHU, with no release over time. The performance of the coating in FA abatement is impressive, with more than 90% of captured FA after one day of contact. The facility to prepare these transparent and colorless coatings from waterborne formulations gives access to new efficient indoor air depolluting solutions, potentially applicable to various surfaces of our living spaces (wall, ceiling, etc.).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Introducing Polyhydroxyurethane Hydrogels and Coatings for Formaldehyde Capture

Bourguignon

Grignard

Detrembleur

2021

ACS Appl. Mater. Interfaces

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Inactivation of atmospheric bacteria using lytic enzyme mixture

Tahara

Deguchi

Arai

The 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society

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The mass of air breathed by a human per day is equivalent to 10-times the mass of food consumed in that time. However, fundamental safety measures for atmospheric bacterial control have not yet been implemented. The purpose of our research is to develop a cell wall Iytic filter using a cell wall Iytic enzyme, which can inactivate the bacteria in air that cause infectious diseases by decomposing their cell envelope. In this study, the use of Iytic enzyme mixture was suggested, including glycosidase, protease and lipase. The performance of the Iytic enzyme mixture was evaluated using lysozyme, a typical Iytic enzyme, as a control. The substrate that we used was Micrococcus luteus, a gram-positive bacteria. The experimental results showed that the use of the Iytic enzyme mixture exhibited a Iytic rate per hour that was 13 - 39% greater than the control. Furthermore, although there are some different phases during bacterium multiplication, the Iytic rate per hour improved for all of the phases when the Iytic enzyme mixture was used.

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Formaldehyde degradation filter via recombinant E.coli enzyme

Cited by 2 publications

References 0 publications

Introducing Polyhydroxyurethane Hydrogels and Coatings for Formaldehyde Capture

Introducing Polyhydroxyurethane Hydrogels and Coatings for Formaldehyde Capture

Inactivation of atmospheric bacteria using lytic enzyme mixture

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