• Journal of the Korean Wood Science and Technology
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• v.35 no.1
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• pp.51-63
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• 2007

The biodeterioration behaviors of wooden parts in the Janggeongpanjeon built in 15 century were investigated according to the types of wood species, positions and parts of wooden column, and environmental conditions. It was found that a high differences of deterioration in the progressing levels of wood decay, according to the types of wood species, positions and parts of wooden column, and environmental conditions. The decay levels were high in the contacted areas with stone foundation which are about up to 8~40 cm above it, although it was shown the many of wooden parts of the round columns are still good condition. In the case of decay type, it was shown the brown-rot in many of the columns at outside of building which made of hardwoods. The decay in position of the columns was most serious in the directions of east-north, west-north and north. It was also indicated that the durability of Zelkova serrata was higher than other wood species of the round columns, while it was in inferior anti-insects.

• Korean Journal of Heritage: History & Science
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• v.48 no.4
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• pp.62-73
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• 2015

The Tae-Jo Geonwolleung is the tomb of the first king Tae-Jo of the Joseon Dynasty in the complex of the Royal Tombs of the Joseon Dynasty which is listed in World Heritage, and it contains various types of stone properties. The material of the stone properties consist of a single type of medium-grained biotite granite, however, each properties have different intensity and types in deterioration phenomena according to their locations and purposes. The major deterioration types of the stones are analyzed as physical decomposition and biodeterioration. The exfoliation, breaking-out and granular decomposition are widespread types of the deterioration throughout the entire burial mound stone properties and surrounding stone properties. On the other hands, the colonization of mosses and plants, and contamination by foreign materials are found more frequent in the burial mound stone properties as these stones are in contact with the soil of the tomb mound and moisture in the soil helped biodeterioration. It is suggested that anti-biology treatment and physical reinforcement are applied to the deteriorated stones to prevent further damage on the stone components of the tomb.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2002.11a
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• pp.369-370
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• 2002

우리나라는 에너지원 다변화정책의 부족으로 인하여 화석연료의 과다사용 현상을 유발하고 있으며, 이로 인한 대기 및 기상환경의 악화현상이 초래되고 있는 실정이다. 또한, 산성비, 산성안개, 광화학스모그, 온실효과 및 사막화 현상의 원인이 되고 있으며, 이로 인한 심각한 환경오염문제를 유발시키고 있다. 한편, 경주 및 주변지역에는 1,000여 년을 지켜온 많은 석조문화재와 다양한 문화유적이 산재하여 있다. (중략)

• Journal of Conservation Science
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• v.30 no.4
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• pp.439-446
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• 2014

We carried out monitoring of deterioration condition for the Rock-carved Buddha Triad in Seosan after dismantlement of protective facilities and conservation treatment. As the results of ultrasonic velocity measurement, physical properties of rock were evaluated to maintain similar the past. Result of digital image analysis, white discoloration was reoccured after four years of conservation treatments. And biodeterioration of unknown in the past was generated left side on the Rock-carved Buddha. Phenomenon of biodeterioration on the surface rocks was estimated by variation of sunshine and water contents according to topography condition.

• 보존과학연구
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• s.26
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• pp.5-25
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• 2005

A consideration number of investigation have begun to elucidate the essential role biological agents play in the deterioration of stone. What is becoming clear is that many factors affect the durability of stone. Physical, chemical, and biological agentsact in co-association, ranging from synergistic to antagonistic, to deteriorate stone. Biodeterioration has usually been considered to be a degradation process following the initial deterioration effects of inorganic agents, especially objects of cultural value such as pagoda, stature of Buddha etc. These agents were thought to condition stone surfaces for microbial contamination due to structural changes and enrichment of inorganic organic nutrient substrates. This report concentrates on the action of biodeteriogens from bacteria to algae and higher plants. Preventive and remedial methods are surveyed, as are a selection of chemical treatments.

• 한국문화재보존과학회:학술대회논문집
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• 2005.03a
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• pp.62-70
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• 2005

This paper presents the results of a study carried out on the diversity of the living microorganisms colonizing the inside of Gyeongjuseokbinggo(Treasures 66) and their effect on the substrate. The inner walls and the arch were first examined with the unaided eye. Green thick mats of algae and microorganisms covered the great part of the walls. For the laboratory research this green biogenic layer and the next soil layer were collected by scraping the walls and the arch under aseptic conditions. The material was then cultured in laboratory. In result, many different species of bacteria, fungi, algae, cyanobacteria and actinomycetes were isolated from the samples.

• ALGAE
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• v.20 no.4
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• pp.295-298
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• 2005

The growth of subaerial microalgae on historic buildings or various cultural properties causes discoloration and physico-chemical deterioration of the surfaces. We collected a subaerial chlorophyte, Chlorella sp., from the stone Standing Buddha statue at Jungwon Miruksazi, which is a national treasure of Korea, and found dormant, thickwalled spores with regular pentagonal ornamentation along with the vegetative Chlorella cells. The morphology of Chlorella resting spores was compared to that of the other green algal resting cells. The ornamented spores and smooth-walled vegetative cells revived in 2 weeks in a liquid freshwater medium and started reproduction by autospores. To our knowledge, the ability of Chlorella to form ornamented dormant spores in drought condition was not previously recorded. The ornamentation of spores would supplement taxonomic characteristics of this genus.

• Proceedings of the Korea Concrete Institute Conference
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• 2005.11a
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• pp.499-502
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• 2005

Recently sewage facilities mainly consisted of concrete structures are being deteriorated seriously by biodeterioration originated from sulfur-oxidizing bacteria. In this study, to prevent biochemical corrosion of the sewer concrete, antibiotics which prevent growth of sulfur-oxidizing bacteria were developed and antimicrobial performance of it was investigated. After that, to consider applicability of antibiotics to concrete, physical properties such as bond strength, resistance to abraision, water absorption and air permeability of concrete covered with inorganic and complex antibiotics were investigated.

• Proceedings of the Korea Concrete Institute Conference
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• 2006.05b
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• pp.73-76
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• 2006

Sewage facilities mainly consisted of concrete structures are being deteriorated seriously by biodeterioration originated from sulfur-oxidizing bacteria. To prevent biochemical corrosion of the sewage concrete, antibiotics which prevent growth of sulfur-oxidizing bacteria were developed. Recently, to evaluate biochemical corrosion properties of concrete, antimicrobial performance and resistance to sulfuric acid were investigated respectively. But, in this study, to evaluate it complexly, concrete specimen covered with antibiotics were exposed in the actual sewage environment and were investigated about corrosion properties after three months. As a result, weight change ratio, nature potential and sulfuric ratio of concrete covered with antibiotics were less than plain concrete.

• Proceedings of the Korea Concrete Institute Conference
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• 2006.05b
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• pp.69-72
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• 2006

Recently sewage facilities mainly consisted of concrete structures are being deteriorated seriously by biodeterioration originated from sulfur-oxidizing bacteria. To prevent biochemical corrosion of the sewage concrete, antibiotics which prevent growth of sulfur-oxidizing bacteria were developed. Existing methods to evaluate properties of biochemical corrosion of concrete examine the antimicrobial performance and resistance to sulfuric acid separately, but don't complexly. So, in this study, new method to test properties of biochemical corrosion of concrete complexly is suggested.