• Journal of the Korea Concrete Institute
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• v.22 no.4
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• pp.547-557
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• 2010

This paper presents a study on the development of next generation smart concrete in an eco-friendly manner using micro-biologically induced calcite precipitation (MICP) via microbial biomineralization. It seems that currently, the reformation and functional improvement of concrete using MICP can be achieved using Sporosarcina pasteurii, which is a representative microorganism that produces calcite precipitation. Based on previous studies on MICP the biochemical tests and crystallinity evaluation of cement using sporoasrcina pasteurii and four additional micro-organisms from the concrete structures as identified by 16S rDNA sequence analysis were conducted. Also by applying the Sporosarcina pasteurii and separated four effective micro-organisms from the concrete structures to mortar, the compressive strength improvement by varying curing conditions, repair of crack were examined, and plans for future study were suggested. The effect of the application of effective micro-organisms can lead to the development of a new material that will contribute to resolution of environmental problems and facilitate repair work, and this can also serve as a new research theme in the future. In addition, the importance of this study is to use micro-organism, which is found common in concrete structures, this new microbial is not only environmentally safe but also persists in the natural environment for an extended period of time. Therefore, it seems to have a great potential to became a new environmentally low-burdened functional material.

• Food Science and Preservation
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• v.17 no.5
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• pp.706-711
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• 2010

Paeonia lactiflora Pall. was extracted with water and the Paeonia lactiflora Pall. extract (PLE) was tested for antimicrobial activities against Corynebacterium xerosis, Candida albicans, Listeria monocytogenes and Pseudomonas syringae. PLE showed pronounced antimicrobial effects at concentrations at or above 50 ${\mu}g$/mL. The activities were stable at $100^{\circ}C$ and over the pH range of 3-11. PLE may serve as a natural antimicrobial agent in food preservation. It is suggested that hydrophillic components in the extract synergistically perturb microbial membrane functions.

• Journal of the Korean Society of Marine Environment & Safety
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• v.27 no.4
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• pp.492-499
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• 2021

In this study, the benthic environmental and microbial community structure were investigated by mixing granulated coal ash(GCA) and contaminated estuary sediments. Estuary sediments and GCA were mixed in a ratio of 8:2 and allowed to interact for 1 month, then sediment environmental factors were investigated. The pH of the experimental sediment was mixed increased to 11. The concentration of DIP(Dissolved inorganic phosphorus) in the experimental case decreased by 30 % compared to the control case, and this should be due to formation of calcium phosphate through the chemical reaction of DIP and calcium which diluted from GCA. The high abundance of Gammaproteobacteria seen in the experimental sediment compare to the control can af ect the DIP reduction. The DIN(Dissolved inorganic nitrogen) concentration increased over two times in the experimental case than the control, and this should be due to the high pH condition and release of NH₄⁺-N from the GCA. Microorganisms related to nitrogen circulation were not identified in both the control and experimental cases. It was confirmed that the GCA were effective in reducing the DIP concentration in contaminated estuary sediment, and that benthic microbial communities were shown to influenced the phosphorus circulation.

• KAPE Magazine
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• s.164
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• pp.4-5
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• 2010

국립수의과학검역원이 계란제품 살균 액란(液卵)에만 적용하던 세균수, 살모넬라균 등 미생물 기준규격을 비살균 액란(液卵)까지 확대 적용하는 내용의 미생물 기준을 3월 12일자로 확정 고시했다. 이번 개정 사항은 생산시설 및 위생관리 보완 등 관련 생산업계의 현황을 고려하여 2개월여의 유예기간을 두어 오는 6월 1일부터 생산되는 알가공품(비살균액란)에 적용될 예정이다.

• Journal of Navigation and Port Research
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• v.38 no.3
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• pp.239-246
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• 2014

A study on the elution characteristics of biostimulating agents (sulfate and nitrate) from biostimulants which are used for in-situ bioremediation for the coastal sediment contaminated with organic matter was performed. The biostimulating agents were mixed with the coastal sediment, and then massed the mixture into ball. Two kinds of ball type biostimulant were prepared by coating the ball surface with two different polymers, cellulose acetate and polysulfone. A granular type biostimulant (GTB) was also prepared by impregnating a granular activated carbon in the biostimulating agent solution. The image of scanning electron microscopy for the biostimulant coated with cellulose acetate (CAB) showed that the inner side of the coating layer consisted of irregular and bigger size of pores, and the surface layer had tight structure like beehive. For the biostimulant coated with polyfulfone (PSB), the whole coating layer had a fine structure without pore. The elution rate of the biostimulating agents for the CAB was higher than that for the PSB, and the elution rate for the GTB was considerably higher than that for the PSB in distilled water as well as in sea water. The elution rate of the biostimulating agents in turbulent water flow was about 3 times higher than that in standing water, and the elution rate of nitrate was higher than that of sulfate from the stimulating agents.

• The Journal of the Convergence on Culture Technology
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• v.10 no.3
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• pp.873-878
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• 2024

We collected rat feces by group period after oral administration of fructooligosaccharides and fruit and vegetable complex extracts for 2 weeks in the Sprague-Dawley rat model of loperamide-induced constipation and analyzed trends in changes in the intestinal microbiome. Microbial composition analysis was performed on Fractoologosaccharide and fruit and vegetable complex extracs(FVCE), by 16S rDNA cloning and pyrosequencing to obtain basic data for the standardization and systematization of the FVCE manufacturing process. Microbial analysis of the prokaryotic community revealed a slight difference in microbial verrucomicrobiota was dominant at the phylum level. At the genus level, prevotella and muribaculaceae showed further differences at the species level. These results suggest that the microbial community used affects the quality of fruit and vegetable complex extracs(FVCE) produced. Thus, a stable microbial community must be maintained for the production of fruit and vegetable complex extracs(FVCE) with consistent quality.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 1997.05a
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• pp.105-111
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• 1997

환경에 관한 지식의 증가와 더불어 환경오염을 적극적으로 해결하기 위한 새로운 연구들은 국경을 초월하고 있다 특히, 미국을 비롯한 여러 환경고도기술국가들속의 실험실의 주역들은 ＜환경 미생물＞을 이용한 제어연구에 엄청난 자본과 심혈을 바치고 있다. 실제로 미국 EPA에 의해 이미 유해유기화합물로 규정된 수많은 물질들이 이른바 환경미생물을 이용한 생물학적인 처리를 통해서, 이산화탄소와 물 및 메탄가스등의 무해한 무기화합물로 변환시킬 수 있음이 이미 확증된 바 있다. 아무리 많은 환경미생물들이라 할지라도 그 미생물 군들의 적절한 선택과, 대사작용이 최상의 상태로 유지될 수만 있다면, 환경오염물질들의 생물학적 처리는 개선된 최신방법중의 하나가 될 것이다. 또 이와 같은 미생물을 이용한 각종 처리방법 및 기작의 신개발은 21세기 환경오염문제 해결에 <마스터키> 역할을 감당해 나갈 것으로 기대된다.

• 보건세계
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• v.54 no.2 s.606
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• pp.44-47
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• 2007

폐렴은 아주 다양한 원인으로 생긴다. 그 중 세균, 곰팡이, 바이러스, 기생충과 같은 미생물이 폐렴을 일으키는 일이 흔하다. 폐렴을 일으키는 미생물이 100여 가지가 넘지만 폐렴을 가장 흔히 일으키는 것은 세균이다. 세균 중에서도 폐렴사슬알균은 폐렴의 가장 흔한 원인이다. 그 외에도 유기용제, 구토물 등이 폐에 들어가 폐렴을 일으키기도 한다.

• Korean Journal of Microbiology
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• v.35 no.1
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• pp.65-71
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• 1999

This study was carried out utilzing ability of sole carbon sources in soil microbial communities used by Biolog GN microplate. Cluster analysis showed that soil microbial cornmuties were categorized into three groups as forest, non-forest soil and naked soil of microbial group. Soil microbial commutites in a forest soil of Qirercus mongoIica was divided into another group microbial communites in Qirercus dendata vegetation soil and Pinus dnzsqlora vegetation soil by Multidimensional scaling(MDS). Generally, sole carbon utilzing abilties were higher in order of polymer, amino acids and carboxylic acids, but it was lower in amides substrates carbon group. From the result: it was supposed that metabolic diversity of microbial communities was corresponded to vegetation succession.

• Proceedings of KOSOMES biannual meeting
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• 2017.11a
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• pp.74-74
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• 2017