• 한국재료학회지
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• 제8권8호
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• pp.685-692
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• 1998

용융탄산염 연료전지는 $650^{\circ}C$의 부식성이 강한 용융탄산염내에서 작동되므로, 분리판 재료로 사용되고 있는 316L 스테인레스강의 부식은 용융탄산염 연료전지의 수명을 단축시키는 주요한 원인이다. 특히 분리판 wet-seal부의 부식은 보다 심각한 것으로 알려져 있다. 이를 해결하기 위하여 AI계 합금이 피복재료로 사용되어 왔지만, 본 연구에서는 보다 우수한 분리판 wet-seal부의 내식 피복재료 개발을 위하여 피복재료인 NiAI 합금에 산화 활성화 원소인 yttrium을 최고 1.5 at%까지 첨가하였다. $650^{\circ}C$의 용융탄산염내에서 yttium 함량에 따른 NiAI/Y 합금의 침지부식실험 및 분극실험을 통하여 내식성을 평가하고 부식 억제를 위해 가장 적절한 NiAI/Y 피복 재료의조성을 결정한 결과 최소의 yttrium 조성은 0.7 at% 임을 알 수 있었다.

• 한국습지학회지
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• 제18권2호
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• pp.201-207
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• 2016

LID 시설에는 물순환 회복과 오염물질 저감을 위해 다양한 종류의 식물이 적용되고 있다. 그러나 겨울철 제설제 살포와 식물의 성장둔화로 인한 급격한 토양 함수량 변화는 식물의 고사 등 문제를 야기시킨다. 따라서 본 연구는 LID 시설에 적용 가능한 8가지 주요 식물을 선정하여 염분에 대한 저항성과 식물의 성장능력, 오염물질 저감능력 및 물순환 회복 등을 평가하기 위하여 수행되었다. 실험에 적용된 식물은 목본류인 조팝나무(S.P), 연산홍(R.I), 메타세콰이어(M.G)와 초본류인 창포(A.C), 하늘매발톱(A.F), 메리골드(T.L), 패랭이(D.C)와 애기별꽃(P.B)이 선정되었다. 식물의 성장은 조팝나무(S.P), 연산홍(R.I), 메타세콰이어(M.G)와 같은 목본류가 초본류에 비하여 성장률이 높은 것으로 나타났다. 염분에 의한 내성은 목본류에서는 메타세콰이어(M.G)>조팝나무(S.P)>연산홍(R.I) 순으로 나타났으며, 초본류에서는 메리골드(T.L)=패랭이(D.C)>창포(A.C)>애기별꽃(P.B)>하늘매발톱(A.F) 순으로 조사되었다. 대부분의 식물에서 염분에 의한 영향과는 상관없이 TN과 TP 저감효율이 60% 이상으로 높게 나타났으며, 메타세콰이어(M.G)가 높은 성장에 기인한 활발한 광합성과 호흡의 영향으로 높은 오염물질 제거능력과 물순환 능력을 보였다.

• 생명과학회지
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• 제15권1호
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• pp.61-65
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• 2005

벼멸구(Nilapawata lugens Stal.)에 대한 저항성 마커 (R208)에서 확실한 차이를 보인 두 자포니카 품종(일품벼과 상해향혈나)을 대상으로 벼멸구 저항성 유전자(Os-Bil)와 내염성과의 관련성을 조사하였다. 이를 위해 두 품종에서 염처리에 의한 Os-Bil 발현량의 변화를 real-time PCR을 이용해 정량화 하였으며, 인디카 두 품종(Pokkali와 IR29)의 결과와 비교하였다. 일품벼는 50, 200 mM NaCl 처리에서 Os-Bil 유전자의 발현량이 농도 의존적으로 감소하였으며, 상해향혈나는 50mM에서만 약간 증가하고 200mM에서는 크게 감소하였다. 비교해서, 내염성인 Pokkali는 Os-Bil의 발현량이 100 mM의 NaCl 처리에 의해 약 2배 증가하였으나 감수성인 IR29는 같은 농도에서 발현량이 감소하였다. 이러한 결과들은 벼멸구 저항성 유전자(Os-Bil)가 적어도 인디카 품종들의 내염성 차이에 관여함을 의미하는 것으로 보인다.

• 한국축산식품학회지
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• 제39권3호
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• pp.503-509
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• 2019

The aim of this study was to compare the effects of number of washes and salt addition on the meat quality in protein recovered from Alaska Pollock compared with pork leg. Various properties of protein recovered from Alaska Pollock (C, washed twice, no salt) and pork leg (T1, washed twice, no salt; T2, two washes, salt added; T3, washed four times, no salt; and T4, washed four times, salt added) were assessed in this study. Pork leg samples exhibited better color (more whiteness, less yellowness) than Alaska Pollock samples. In pork leg samples, four washes (T3, T4) during processing yielded whiter, less yellow protein than two washes (T1, T2). Overall, the textural property measures were higher in pork leg samples (T2, T3, and T4) than in other samples. Breaking force, jelly strength, and folding resistance were significantly higher in salt-treated pork leg samples (T2, T4) than in the other samples. Our findings demonstrate that protein recovered from pork leg has better color parameters, and physical strength compared with Alaska Pollock-derived protein. A higher number of wash steps and treatment with salt during processing were furthermore found to yield better color, and physical strength in the protein samples.

• Journal of Welding and Joining
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• 제28권3호
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• pp.79-85
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• 2010

Hardfacing is one of the frequently applying method to increase surface hardness in hot forging die. Recently, hardfacing receives great attention due to it's repair availability and low cost. In hot forging die, crack resistance and thermal shock resistance have been considered as major properties, However there are few studies for the assessment of these properties. So, it is necessary to establish the assessment method for crack resistance and thermal shock resistance in hardfacing for hot forging die. In this study, flux cored arc welding was applied to make hardfacing welds. Three point bending test was carried out to assess hardfacing weld's crack resistance, and high temperature bending test using salt bath was developed for thermal shock resistance. Consequently, it was possible to assess crack resistance and thermal shock resistance of hardfacing welds for hot forging die quantitatively.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.189-189
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• 2017

Salinity is one of the major abiotic stresses that severely affect crop production throughout the world; especially rice plant which is generally categorized as a typical glycophyte as it cannot grow in the presence of salinity. Phenotypic resistance of salinity is expressed as the ability to survive and grow in a salinity condition. Salinity resistance has, at least implicitly, been treated as a single trait. Physiological studies of rice suggest that a range of characteristics (such as low shoot sodium concentration, compartmentation of salt in older rather than younger leaves, high potassium concentration, high $K^+/Na^+$ ratio, high biomass and plant vigour) would increase the ability of the plant to cope with salinity. Criteria for evaluating and screening salinity tolerance in crop plants vary depending on the level and duration of salt stress and the plant developmental stage. Plant growth responses to salinity vary with plant life cycle; critical stages sensitive to salinity are germination, seedling establishment and flowering. We have established a standard protocol to evaluate large rice germplasms for overall performance based on specific physiological traits for salt tolerance at seedling stage. This protocol will help in identifying germplasms which can perform better in the presence of different salinity treatments based on single trait and also combination of different physiological traits. The salt tolerant germplasm can be taken forward into developing better varieties by conventional breeding and exploring genes for salt tolerance.

• Nuclear Engineering and Technology
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• 제53권5호
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• pp.1569-1579
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• 2021

This study aims to provide microstructural characterization for the matrix graphite which molten salt reactors (MSRs) use, and improve resistance to molten salt infiltration of the matrix graphite for fuel elements. Mesocarbon microbeads (MCMB) densified matrix graphite A3-3 (MDG) was prepared by a quasi-isostatic pressure process. After densification by MCMBs with average particle sizes of 2, 10, and 16 ㎛, the pore diameter of A3-3 decreased from 924 nm to 484 nm, 532 nm, and 778 nm, respectively. Through scanning electron microscopy, the cross-section energy spectrum and time-of-flight secondary ion mass spectrometry, resistance levels of the matrix graphite to molten salt infiltration were analyzed. The results demonstrate that adding a certain proportion of MCMB powders can improve the anti-infiltration ability of A3-3. Meanwhile, the closer the particle size of MCMB is to the pore diameter of A3-3, the smaller the average pore diameter of MDG and the greater the densification. As a matrix graphite of fuel elements in MSR was involved, the thermal and mechanical properties of matrix graphite MDG were also studied. When densified by the MCMB matrix graphite, MDGs can meet the molten salt anti-infiltration requirements for MSR operation.

• Journal of Industrial and Engineering Chemistry
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• 제68권
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• pp.99-108
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• 2018

An oil-tolerant and salt-resistant aqueous foam system was screened out as a possible lubricant to enable cold heavy oil transportation. The microstructures and viscoelasticity and effects of heavy oil, salt and temperature on the foam stability were investigated and new rheological and drainage models were established. The results indicate the foam with multilayered shells belongs to a special microcellular foam. The viscoelasticity could be neglected due to its low relaxation time. The drainage process can be divided into three stages. The foam with quality of 67.9% maintains great stability at high oil and salt concentrations and appropriate elevated temperature.

• BMB Reports
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• 제44권11호
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• pp.747-752
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• 2011

To investigate the effects of disulphide bond position on the salt resistance and lipopolysaccharide (LPS)-neutralizing activity of ${\alpha}$-helical homo-dimeric antimicrobial peptides (AMPs), we synthesized an ${\alpha}$-helical model peptide ($K_6L_4W_1$) and its homo-dimeric peptides (di-$K_6L_4W_1$-N, di-$K_6L_4W_1$-M, and di-$K_6L_4W_1$-C) with a disulphide bond at the N-terminus, the central position, and the C-terminus of the molecules, respectively. Unlike $K_6L_4W_1$ and di-$K_6L_4W_1$-M, the antimicrobial activity of di-$K_6L_4W_1$-N and di-$K_6L_4W_1$-C was unaffected by 150 mM NaCl. Both di-$K_6L_4W_1$-N and di-$K_6L_4W_1$-C caused much greater inhibitory effects on nitric oxide (NO) release in LPS-induced mouse macrophage RAW 264.7 cells, compared to di-$K_6L_4W_1$-M. Taken together, our results indicate that the presence of a disulphide bond at the N- or C-terminus of the molecule, rather than at the central position, is more effective when designing salt-resistant ${\alpha}$-helical homo-dimeric AMPs with potent antimicrobial and LPS-neutralizing activities.

• 한국재료학회지
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• 제23권2호
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• pp.128-134
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• 2013

A study on the corrosion behavior of Inconel alloys and Incoloy 800H in molten salt of LiCl-$Li_2O$ was investigated at $650^{\circ}C$ for 24-312 hours in an oxidation atmosphere. The order of the corrosion rate was Inconel 600 < Inconel 601 < Incoloy 800H < Inconel 690. Inconel 600 showed the best performance suggesting that the content of Fe, Cr and Ni are the important factor for corrosion resistance in hot molten salt oxidation conditions. The corrosion products of Inconel 600 and Inconel 601 were $Cr_2O_3$ and $NiFe_2O_4$, In case of Inconel 690, a single layer of $Cr_2O_3$ was formed in the early stage of corrosion and an outer layer of $NiFe_2O_4$ and inner layer of $Cr_2O_3$ were formed with an increase of corrosion time. In the case of Incoloy 800H, $Cr_2O_3$ and $FeCr_2O_4$ were observed. Most of the outer scale of the alloys was observed to be spalled from the results of the SEM analysis and the unspalled scale which adhered to the substrate was composed of three layers. The outer layer, the middle one, and the inner one were Fe, Cr, and Ni-rich, respectively. Inconel 600 showed localized corrosion behavior and Inconel 601, 690 and Incoloy 800H showed uniform corrosion behavior. Ni improves the corrosion resistance and too much Cr and/or Fe content deteriorates the corrosion resistance.