• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1998년도 봄 학술발표회논문집(II)
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• pp.621-626
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• 1998

An experimental investigation on the reinforcing bar corrosion and relationshid of reinforcing bar and concrete bond strength has been conducted to establish the allowable limit of rust in the construction field. The reinforcing bars used in this study were rusted before embedding in concrete. The first component of this experiment is to make rust of reinforcing bar rust artificially based on Faraday's theory at certain rates such as 2, 4, 6, 8 and 10% of reinforcing bar weight. For estimation of the amount of rust by weight, Clarke's solution and Shot blasting were adopted and compared. Parameters include 240 and 450kg/㎠ of compressive strengths and diameter of reinforcing bar (16, 19 and 25mm) corresponding development length for pull-ort test. And, pull-out tests were carried. out according to KSF 2441 and ASTMC 234 to investigate the effect of the corrosion rate on reinforcing bar-concrete bond behavior. It is found from the test results that the test techniques for corrosion of bar used in this study is relatively effective and correct test method. Results shows that up to 2% of rust increases the bond strength regardless of concrete strength and diameter of reinforcing bar like the existing data. It might be because of the roughness from rust. As expected, the bond strength increases as compressive strength of concrete increases and the diameter of bar decreases.

• Journal of Ginseng Research
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• 제21권2호
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• pp.69-77
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• 1997

In order to explain the connection between ginseng rust spot and soil ecological conditions, the bed soils and ginseng roots were sampled at different microrelief units and the reducing substances of the bed soils and iron forms of the ginseng root epi dermises were determined. The results showed that the occurrence of the rust spot was connected with the ecological conditions of the soils and the metabolism of the plant which was caused by the excessive $Fe^{2+}$ in the soil solution. Ginseng rust spot was the enrichment of iron which was mainly composed of organic complex irons. Including active ferrous active ferric and non active ferric forms and they were transformed into each other following the change of soil moisture and temperature regimes. According to the regularity of growth and decline of reducing substances in soil and rust index of ginseng roots as well as the difference of adaptability to excessive $Fe^{2+}$ in soil among different year-old seeding, a new comprehensive measure based on the connection of ameliorating soil and improving cultivation system was recommended to prevent the occurrence of ginseng rust spot.

• Mycobiology
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• 제50권3호
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• pp.166-171
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• 2022

Virginia creeper (or five-leaved ivy; Parthenocissus quinquefolia) is one of the most popular and widely grown climbers worldwide. In September 2021, Virginia creeper leaves with typical rust symptom were found in an arboretum in Korea, with severe damage. Globally, there is no record of a rust disease on Virginia creeper. Using morphological investigation and molecular phylogenetic inferences, the rust agent was identified as Neophysopella vitis, which is a rust pathogen of other Parthenocissus spp. including Boston ivy (P. tricuspidata). Given that the two ivy plants, Virginia creeper and Boston ivy, have common habitats, especially on buildings and walls, throughout Korea, and that N. vitis is a ubiquitous rust species affecting Boston ivy in Korea, it is speculated that the host range of N. vitis may recently have expanded from Boston ivy to Virginia creeper. The present study reports a globally new rust disease on Virginia creeper, which could be a major threat to the ornamental creeper.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2021년도 춘계학술발표대회
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• pp.151-154
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• 2021

Rust is a promising system programming language that made its debut in 2010. It was developed to address the security problems in C/C++. It features a property called ownership, on which it relies to mitigate memory attacks. For this and its many other features, the language has consistently gained popularity and many companies have begun to seriously consider it for production uses. However, Rust also supports safe and unsafe regions under which the foreign function interface (FFI), used to port to other languages, falls. In the unsafety region, Rust surrenders most of its safety features, allowing programmers to perform operations without check. In this study, we analyze the security issues that arise due to Rust's safety/unsafety property, especially those introduced by Rust FFI.

• 한국작물학회지
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• 제31권4호
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• pp.440-446
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• 1986

열대 및 아열대지역의 대두재배에서 수량을 격감시키고 있는 콩녹병에 대한 내병성품종과 이병성품종을 공시하여, 본 병해의 진전과정과 생리적 및 수량관련형질에 미치는 영향을 검토한바 그 결과를 요약하면 마음과 같다. 1. 이병성품종은 내병성품종에 비하여 병의 조기감염 및 진전이 빨랐으며, 녹병에 의한 낙엽은 콩 꼬투리가 반정도 등숙된 후부터 급격히 증가하였다. 2. LAI의 감소는 이병성품종이 내병성품종에 비하여 빨랐으며, 건전개체와 녹병 이병개체간의 엽녹소함양의 차리는 내병성품종에서 2.04%, 이병성품종에서 16.43%의 차이가 있었다. 3. 지상부 건물중은 녹병무발병구(살균제 처리구)에서는 계속 증가하였으나, 녹병발병구에서는 R$_{6}$ 생육단계 이후부터 감소하였고, 감소정도는 이병성품종이 내병성품종에 비하여 더 컸다. 4. 협과 종실의 건물중은 이병성품종의 녹병무발병구에서는 R$_{6}$생육단계 이후에 급격히 증가하였으나, 녹병발병구에서는 아주 완만하게 증가하였고, 내병성품종에서는 녹병의 영향을 적게 받아 녹병발병구에서 계속 큰 폭으로 증가하였다. 5. 녹병은 불완전립과 빈 꼬투리 수를 증가시키고, 종실의 Oil 함양 및 길이, 폭, 두께를 감소시키며, 협수, 입수, 백립중을 감소시켜 수량을 격감시키지만 단백질 함양에는 영향을 미치지 않았다. 6.수량에 대한 녹병의 영향은 내병성품종에서 22.3%, 이병성품종에서 68.7%의 수양감소가 있었다.

• 한국산학기술학회논문지
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• 제14권5호
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• pp.2063-2068
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• 2013

해양환경에서 사용되는 선박이나 해양구조물은 해수환경에서 쉽게 부식이 발생한다. 본 연구에서는 구조용 강재에서 부식생성물의 존재가 피로강도에 미치는 영향에 대하여 조사하였다. 이를 위하여 부식생성물을 제거한 시험편과 부식생성물이 부착된 시험편의 피로강도를 비교하고 부식생성물의 강도분담에 대하여 고찰하였다. 본 연구에서 부식생성물은 피로강도분담효과가 있으며, 부식생성물을 제거한 시험편의 피로강도는 부식생성물이 부착되어 있는 시험편보다 피로강도감소계수가 18.1% 감소하였다. 이상의 연구에서 부식생성물 내에서 강도상 유해물질이 없는 한 부식생성물은 피로강도에 유익함을 알 수 있었다.

• The Plant Pathology Journal
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• 제31권3호
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• pp.299-304
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• 2015

Interaction of the the rust fungus Puccinia miscanthi with the biofuel plant Miscanthus sinensis during the teliospore phase was investigated by light and electron microscopy. P. miscanthi telia were oval-shaped and present on both the adaxial and abaxial leaf surfaces. Teliospores were brown, one-septate (two-celled), and had pedicels attached to one end. Transmission electron microscopy revealed numerous electron-translucent lipid globules in the cytoplasm of teliospores. Extensive cell wall dissolution around hyphae was not observed in the host tissues beneath the telia. Hyphae were found between mesophyll cells in the leaf tissues as well as in host cells. Intracellular hyphae, possibly haustoria, possessed electron-dense fungal cell walls encased by an electron-transparent fibrillar extrahaustorial sheath that had an electron-dense extrahaustorial membrane. The infected host cells appeared to maintain their membrane-bound structures such as nuclei and chloroplasts. These results suggest that the rust fungus maintains its biotrophic phase with most mesophyll cells of M. sinensis. Such a nutritional mode would permit the rust fungus to obtain food reserves for transient growth in the course of host alteration.

• 미생물학회지
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• 제19권3호
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• pp.108-114
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• 1981

In order to isolate microorganisms which produce antibiotics aganist wheat black rust, some bacteria, molds, and actinomycetes were isolated from soils and screened for the production of antibiptics against wheat black rust. Beacuse wheat black rust-puccinia graminis--is a complete parsitic mold which can't grow in artifical medium, new method for the screening of antibiotic producing microorgsnisms against wheat black rust developed by using live leaves of wheat. With new method, a strain No. $480HS_{20}$ which produces a substnace having strong and Puccinia graminis activity and very narrow antimicrobial spectrum was isolated. the substance produced by the strain No.$480HS_{20}$ had better anti Puccinia graminis activity than any other known antifungal antibotics such as kasurgamycin, balasticidins, actidione, antimycin, ologomycin. And the substance was observed to be very stable at heat and ultraviolet light. The strain was indentified as Bacillus subtilis.

• 한국표면공학회:학술대회논문집
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• 한국표면공학회 2014년도 추계학술대회 논문집
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• pp.82-82
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• 2014

마감 도장이 완료된 면이 장기간 노출된 상태에서 후속 작업으로 인해 금속 분진 등의 오염물이 쌓이면 수분 및 염분 등과의 반응으로 도장 표면에 녹 등의 2차 오염이 발생하여 광택이나 표면 미려함 등을 잃어버리게 된다. 이럴 경우 소요되는 시간과 경비를 줄이기 위해 재도장 작업 대신 도장 표면의 오염 막을 제거하기 위한 방법으로 rust remover가 사용되고 있으나, 현재 rust remover 사용에 따른 도막 열화에 관한 객관적인 자료가 없는 실정이다. 본 연구에서는 당에서 사용되고 있는 선박용 마감 도료를 대상으로 rust remover가 도막 표면 열화에 미치는 영향에 대하여 조사 검토하다.

• 한국구조물진단유지관리공학회 논문집
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• 제5권1호
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• pp.188-194
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• 2001

A reinforced concrete structure is complex structure that works as one body with bonding role of steel bar and concrete. The bonding action between steel bar and concrete makes possible the compound structure. The transmission of mutual strength of the steel bar with concrete in structure is determined by the bonding characteristic of steel bar and concrete surface. But the efficiency of bonding characteristic of steel bar is Questionable by the corrosion cause by the delay construction term, the wrong management, etc. So this study investigate bonding characteristic of reinforced concrete using pull-out test method which steel bar removed rust and the principal variables of this study are concrete compression strength and the degree of corrosion. The result showed that bonding strength tend to increase when removed rust of steel bar whereas it tend to decrease when not removed rust.