• Title/Summary/Keyword: Salt damage

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Salt treatment for recovery of the mud loach, Misgurnus mizolepis from transport stress

  • Yu, Jin-Ha;Kim, Dae-Hyun;Han, Jung-Jo;Park, Sung-Woo
    • Korean Journal of Veterinary Research
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    • v.56 no.4
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    • pp.215-221
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    • 2016
  • Due to the shortage of the fingerling/juvenile mud loach, Misgurnus mizolepis in Korea, these fish have been imported from China. However, the mortality rate during and after their transportation is very high. In this study, we examined various physiological and histological parameters to evaluate the effect of salt treatment on the survival and recovery of mud loaches in holding farms during the quarantine process. Glucose, osmolality, $Na^+$, $Cl^-$, and histological changes were assessed for three different salinities. Non-treated fish (control 0.0%) exhibited lower levels of osmolality, and $Na^+$ and $Cl^-$ concentrations compared with those kept in solar salt solution (0.5% and 1.0%). Glucose levels in control fish were higher than those in fish exposed to 0.5% and 1.0% solar salt solution. Histologically, control fish showed thinner epidermis of skin, branchial hyperplasia and lamellar fusion with an abundance of eosinophilic granule cell-like cells. After solar salt solution treatment, damaged gill structures in the fish almost recovered within 5 days. The present study demonstrates that mud loaches transported from China suffer from skin and gill damage and physiological dysfunction which may increase the mortality and morbidity. Moreover, saline treatment might alleviate the stress responses and ionic/osmotic imbalances, and help heal gill damage.

Chloride Penetration Analysis of Fly Ash Concrete using Potentiometric Titration and XRF (플라이애시를 혼입한 콘크리트의 전위차 적정법과 XRF를 이용한 염화물 침투 분석 )

  • Eun-A Seo;Ji-Hyun Kim;Ho-Jae Lee
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.27 no.5
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    • pp.16-22
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    • 2023
  • In this study, a salt water immersion test was performed on concrete specimens simulating the concrete mix design of the nuclear power plant, and the correlation between the amount of chloride and the XRF component according to the depth of the concrete was analyzed. The amount of chloride on the surface of the nuclear power plant concrete increased slightly with increasing immersion time in salt water, but the amount of chloride in the depth of 5.5 mm or more showed a clear tendency to increase with increasing immersion time in salt water. As a result of analyzing the correlation between the amount of chloride in concrete and the XRF component, the concrete with 20% FA substitution compared with the OPC concrete showed a very high correlation between the composition ratio of Cl ions and the evaluation result of salt damage resistance by XRF component analysis. Accordingly, it was confirmed that chlorine ion analysis and salt damage resistance performance evaluation by XRF component analysis were possible through repeated data accumulation in the nuclear power plant concrete mix with 20% fly ash replacement.

Cerebral salt wasting syndrome caused by external lumbar drainage in a patient with chronic hydrocephalus

  • Yoo, Je Hyun;Park, Ki Deok;Lim, Oh Kyung;Lee, Ju Kang
    • Annals of Clinical Neurophysiology
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    • v.24 no.1
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    • pp.30-34
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    • 2022
  • In cases of hyponatremia induced by brain damage, it is important to distinguish between the syndrome of inappropriate anti-diuretic hormone secretion (SIADH) and cerebral salt wasting syndrome. A ventriculoperitoneal (VP) shunt is the standard treatment for hydrocephalus, and external lumbar drainage (ELD) is an option to evaluate the effect of a VP shunt. However, ELD has potential complications, such as subarachnoid hemorrhage, meningitis, and rarely hyponatremia. Therefore, we report a case of a patient with cerebral salt-wasting syndrome resulting from ELD to treat normal-pressure hydrocephalus during the rehabilitation of acute ischemic stroke.

Inabenfide-Induced Alleviation of Salt Stress in Rice as Linked to Changes in Salicylic Acid Content and Catalase Activity

  • Sawada, Hiroko;Kim, Dea-Wook;Kobayashi, Katsuichiro;Shim, Ie-Sung
    • Journal of Crop Science and Biotechnology
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    • v.10 no.1
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    • pp.39-44
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    • 2007
  • The effect of inabenfide was investigated in rice seedlings subjected to salt stress in relation to changes in chlorophyll fluorescence(${\Delta}F/Fm'$), lipid peroxidation, salicylic acid(SA) content, and catalase(CAT) activity. A reduction in shoot growth of rice seedlings by 120 mM NaCl treatment was significantly alleviated by pretreatment with 30 ${\mu}M$ inabenfide. Sodium ion content was not affected by pretreatment with inabenfide, suggesting that alleviation was not due to a reduction in sodium ion uptake by the rice seedlings. At three days after NaCl treatment, the rice seedlings pretreated with inabenfide showed a higher ${\Delta}F/Fm'$(30%) and lower lipid peroxidation(28%) compared with the rice seedlings treated with NaCl alone. After NaCl treatment, CAT activity in the third leaf of rice seedlings decreased significantly but alleviated by pretreatment with inabenfide. Furthermore, pretreatment with inabenfide also reduced the level of SA which accumulated drastically in the third leaf of rice seedlings within a day after exposure to salt stress. These results suggest that inabenfide prevents SA accumulation in rice seedlings under salt stress which eventually induces the alleviation of salt stress damage.

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High Density Salt and Pepper Noise Removal using Interpolation (보간법을 이용한 고밀도 Salt and Pepper 잡음 제거)

  • Baek, Ji-Hyeon;Park, Jun-Mo;Kim, Nam-Ho
    • Journal of the Institute of Convergence Signal Processing
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    • v.20 no.3
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    • pp.165-170
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    • 2019
  • Recently, modern society has come up with the importance of video processing as various imaging systems have developed. However, deterioration occurs in the process of transmitting, processing, and storing video data for various reasons. Deterioration will damage the original image, and the typical noise is Salt and Pepper noise. There are A-TMF, CWMF, and linear interpolation as the means to eliminate Salt and Pepper noise. However, these methods show somewhat poor noise abatement performance in high-density noise areas. Therefore, this paper proposes an algorithm to eliminate noise using modified linear interpolation. To prove the validity of the proposed algorithm, PSNR, Profile was used to compare it with existing methods.

An Experimental Study on the Chloride Diffusion of Concrete by Experimental in Room of Individual and Combined Deterioration (단독 및 복합열화의 실내촉진실험에 의한 콘크리트의 염화물 확산에 관한 실험적 연구)

  • Kim, Young-Sun;Koo, Kyung-Mo;Kim, Young-Duck;Cho, Bong-Suk;Kim, Gyu-Yong;Kim, Moo-Han
    • Proceedings of the Korea Concrete Institute Conference
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    • 2006.05a
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    • pp.574-577
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    • 2006
  • Recently, the deterioration due to salt damage and carbonation as the main factors of deteriaoration of the domestic reinforced concrete structures has been increased. Also the national and social concern about the durability recovery of the deteriorated reinforced concrete structures is geratly being raised. Therefore, it is the final purposes of this study to develop the performance evaluation technique for durability of reinforced concrete structures deteriorated due to salt damage and carbonation with the proposal of the service life prediction method for the investigation and diagnosis of reinforced concrete structures, and accelerated test in Lab.

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The New Repair System of R.C Structure caused by carbonation and salt damage (중성화 및 염해를 입은 콘크리트구조물의 보수시공기술)

  • Kwon, Young-Jin;Kim, Chul-Ho;Jang, Tea-Min;Park, Deuk-Kon;Choi, Long
    • Proceedings of the Korea Concrete Institute Conference
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    • 1996.04a
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    • pp.414-417
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    • 1996
  • It is the aim of this study to introduce the performance and application of new repair system for the exterior wall by durability failure caused carbonation and salt damage. The elementary performance of this repair system is as follows. (1) Al the layer in the repair are cement based, same with the mother concrete (2) this repair system use SBR admixture (3) This cement and mortar powder for this repair system are premixed and ready to use just adding admixture at the job site.

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The Method Effect of Reinforced Concrete by Applying Impressed Current Cathodic Protection (외부전원법을 적용한 철근콘크리트의 방식효과)

  • Lee, Hae-Seung;Cho, Gyu-Hwan;Park, Dong-Cheon
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2013.11a
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    • pp.60-61
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    • 2013
  • For reinforced concrete structures located in a sea environment, the Impressed Current Cathodic Protection (ICCP) is mostly used as a signature method to prevent steel corrosion. For this research, specimens to which the ICCP is applied were manufactured under the assumption of two following cases the specimens are exposed to various salt damage environments (submerged zone, tidal zone), and deteriorative factors (crack) occur in concrete. For the specimens manufactured, an enhancement experiment for deterioration was conducted through regular cycle change under the temperature between 15 ~ 70℃ with 70 ~ 90% humidity. Afterwards, the method effect was verified through a half-cell method and application of the ICCP derived from salt damage environments was investigated.

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