Yunhee Moon - Academia.edu (original) (raw)

Papers by Yunhee Moon

Industrial & Engineering Chemistry Research, 2013

Recently, interspecies quorum quenching by bacterial cells has been reported as a novel approach ... more Recently, interspecies quorum quenching by bacterial cells has been reported as a novel approach to the biofouling control in a membrane bioreactor (MBR) for wastewater treatment. In this study, a novel quorum quenching (QQ) bacterium, Pseudomonas sp. 1A1, was isolated from lab-scale MBR and was encapsulated in a microbial vessel made of a hollow fiber microporous membrane for the biofouling control in MBR. Pseudomonas sp. 1A1 was most likely to produce AHL-acylase and degraded to a wide range of N-acyl homoserine lactones (AHLs), although there was a large difference in the degradation rate of each AHL. It has an extracellular QQ activity, i.e., it produces QQ enzymes, and excretes them out of the cell. The microbial vessel encapsulating Pseudomonas sp. 1A1 was applied to a lab-scale MBR and proved substantial inhibition of the membrane biofouling.

KSBB Journal, 2011

1. Effective Microorganisms (EM), a fermented medium developed by Professor Higa at the Universit... more 1) Effective Microorganisms (EM), a fermented medium developed by Professor Higa at the University of the Ryukyus, is a mixed culture containing dozens of microorganisms which are beneficial to nature including people, animals, plants and many microbial species in environment. EM is known to contain more than 80 kinds of anaerobic or aerobic microbes including photosynthetic bacteria, lactic acid bacteria, yeast, actinomycetes, fungi and so on, with yeast, lactic acid bacteria and photosynthetic bacteria as the main species of EM. Antioxidant effect generated by the concert of complex coexistence and coprosperity among these microbes is considered to be the main source of EM benefits. Currently, EM is earning an increasing attention with applications in agriculture, forestry, animal husbandry, fisheries, environment and medicine among others. At the same time, however, a quantitative interpretation of EM system based on a mixed culture model needs efforts from biochemical engineers for efficient production and further promotion of EM. In this paper, we describe the functions of major microbes in EM and current researches and applications of EM in agriculture, forestry, animal husbandry, fisheries, environment and medicine.

Industrial & Engineering Chemistry Research, 2013

Recently, interspecies quorum quenching by bacterial cells has been reported as a novel approach ... more Recently, interspecies quorum quenching by bacterial cells has been reported as a novel approach to the biofouling control in a membrane bioreactor (MBR) for wastewater treatment. In this study, a novel quorum quenching (QQ) bacterium, Pseudomonas sp. 1A1, was isolated from lab-scale MBR and was encapsulated in a microbial vessel made of a hollow fiber microporous membrane for the biofouling control in MBR. Pseudomonas sp. 1A1 was most likely to produce AHL-acylase and degraded to a wide range of N-acyl homoserine lactones (AHLs), although there was a large difference in the degradation rate of each AHL. It has an extracellular QQ activity, i.e., it produces QQ enzymes, and excretes them out of the cell. The microbial vessel encapsulating Pseudomonas sp. 1A1 was applied to a lab-scale MBR and proved substantial inhibition of the membrane biofouling.

KSBB Journal, 2011

1. Effective Microorganisms (EM), a fermented medium developed by Professor Higa at the Universit... more 1) Effective Microorganisms (EM), a fermented medium developed by Professor Higa at the University of the Ryukyus, is a mixed culture containing dozens of microorganisms which are beneficial to nature including people, animals, plants and many microbial species in environment. EM is known to contain more than 80 kinds of anaerobic or aerobic microbes including photosynthetic bacteria, lactic acid bacteria, yeast, actinomycetes, fungi and so on, with yeast, lactic acid bacteria and photosynthetic bacteria as the main species of EM. Antioxidant effect generated by the concert of complex coexistence and coprosperity among these microbes is considered to be the main source of EM benefits. Currently, EM is earning an increasing attention with applications in agriculture, forestry, animal husbandry, fisheries, environment and medicine among others. At the same time, however, a quantitative interpretation of EM system based on a mixed culture model needs efforts from biochemical engineers for efficient production and further promotion of EM. In this paper, we describe the functions of major microbes in EM and current researches and applications of EM in agriculture, forestry, animal husbandry, fisheries, environment and medicine.