• Title, Summary, Keyword: KCl

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KCl Crystal Growth and High Energy X Ray Expose of Properties (KCl 단결정의 성장 및 고 에너지 X선 조사 특성)

  • Park, Cheol-Woo
    • The Journal of Korean Society for Radiation Therapy
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    • v.20 no.1
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    • pp.31-36
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    • 2008
  • Purpose: X ray irradiates material for dose distribution confirmation through material color variation to evaluate about possibility. Materials and Methods: That is rare earth material to pure KCl and KCl impurity Eu adding 0.5mol% by Czochralski method each single crystal grow and observed color variation of KCl X ray irradiation use of linear accelerator. Results: High energy X ray irradiation KCl:Eu show the blue fluorescence with purple color that pure KCl single crystal can confirm by show was not observed, but was colored violet. Conclusion: Colors variation of KCl founds stable color center from radiation and this color variation will be used usefully to X ray measurement material and phantom.

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Effect of Potassium Application on Yield-Related Characters and Contents of Starch and Hydrocyanic Acid of Cassava

  • Park Chang-Ho;Kim Kwang-Ho;Aswidinnoor Hajrial;Rumawas Fred
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.50 no.5
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    • pp.309-318
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    • 2005
  • Higher level of KCl application stimulated both leaf area index and leaf area duration in all cassava varieties, while the leaf and tuber number of the bitter varieties (high cyanide-level varieties) decreased in proportion to the level of KCl application. The root/shoot (R/S) ratio and harvest index (HI) were negatively related with the level of KCl application in all cassava varieties. The bitter varieties obtained the lowest R/S ratio at the level of 100 - 150 kg KCl $ha^{-1}$, while the sweet varieties (low cyanide-level varieties) acquired the highest values at the level of 50 - 150 kg KCl $ha^{-1}$. Also, the sweet varieties showed the lowest HI at the level of 250 kg KCl $ha^{-1}$, but the bitter varieties at the level of 150 kg KCl $ha^{-1}$. At 6 - 8 months after planting, the sweet varieties tended to obtain higher starch content of roots (tubers) at the level of 50 - 150 kg KCl $ha^{-1}$, while the bitter varieties at the level of 150 - 250 kg KCl $ha^{-1}$. Relatively lower level of 50 - 150 kg KCl $ha^{-1}$ was more appropriate for decreasing hydrocyanic acid (HCN) content of roots (tubers) in the sweet varieties at the harvest time, and the level of 250 kg KCl $ha^{-1}$ was adequate to decrease not only HCN content of leaves but also that of roots (tubers) in the bitter varieties during the growing period. To obtain higher yield and starch content of tubers, and lower HCN content of roots (tubers), it was recommended that the sweet varieties are applied with the level of 50 - 100 kg KCl $ha^{-1}$ and the bitter varieties with the level of 150 - 200 kg KCl $ha^{-1}$, respectively, in Latosol soils of Bogor areas, West Java.

Effect of Potassium Chloride on the Separation and Purification of Model Proteins using Counter Current Distribution (역류분배에 의한 모델단백질의 분리정제시 염화칼륨의 영향에 관한 연구)

  • Lee, Chang-Ho;Lee, Boo-Yong;Lee, Cherl-Ho
    • Korean Journal of Food Science and Technology
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    • v.22 no.2
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    • pp.177-182
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    • 1990
  • The changes in the partition coefficient of model proteins (lysozyme, myoglobin, conalbumin, bovine serum albumin) in an aqueous two·phase system formed by polyethylene glycol and dextran were examined in order to improve the capacity of counter current distribution (CCD) for the protein fractionation and concentration . The protein distribution pattern in CCD with 30 tubes varied with the pH (4.5, 5.5, 6.5, 9.0, 12.0) and KCl concentration (0mM, 50mM, 250mM, 500mM) of the system. From the mixture of model proteins, pure myoglobin was appeared at the upperphase of 14th tube having 50mM of KCl at pH 5.5 and the upper-phase of 13th tube having 250mM of KCl at pH 6.5. Similarly pure BSA was obtained at the 14th tube having KCl 250mM with pH 4.5, pure lysozyme at the 19th tube having 500mM of KCl at pH 4.5 and the upper-phase of 16th tube 50mM of KCl at pH 5.5.

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The Improvement of surface activity and Emulsification Activity by Transformation of Lipase Gene in Klebsiella sp. KCL-1, Oil-Degrading Bacterium. (Lipase gene의 도입에 의한 유류분해세균 Klebsiella sp. KCL-1의 표면활성과 유화력 향상)

  • 정수열
    • Journal of Life Science
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    • v.14 no.5
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    • pp.834-839
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    • 2004
  • To improve and oil degrading activity, the lipase gene from Pseudomonase sp. was transformed into Klebsiella sp. KCL-l, an oil degrading bacterium. The selected trasformant was named as a KCL-1/pET-Lip. The surface tension of culture broth of KCL-1/pET-Lip was decreased to 33 dyne/cm from 55 dyne/cm using 4% (v/v) soybean oil as sole carbon source. The surface tension were 44 and 37.5 dyne/cm, to 2% (w/v) glucose and 4% (v/v) kerosene medium, respectively. The emulsification activity of the biosurfactant solution containing lipase of KCL-l/pET-Lip improved better than wild type KCL-l. The soybean oil was most efficient carbon source and substrate for surface activity and emulsification activity of KCL-1/pET-Lip. The expression of lipase was confirmed by SDS-PAGE.

Evaluating the Performance of Blended Fertilizer Draw Solution in Reuse of Sewage Water Using Forward Osmosis (정삼투를 이용한 하수의 재이용에서 혼합비료 유도용액의 성능 평가)

  • Kim, Seung-Geon;Lee, Ho-Won
    • Applied Chemistry for Engineering
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    • v.31 no.1
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    • pp.90-96
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    • 2020
  • This paper aims to reuse sewage by a forward osmosis using a blended fertilizer as a draw solution. This work deals with the primary sedimentation basin influent, effluent, and secondary sedimentation basin effluent from J sewage treatment plant. The average permeate water flux was higher in the order of the blend of KCl and NH4Cl > KCl and NH4H2PO4 > KCl and (NH4)2HPO4, and the reverse solute flux was lower in the order of the blend of KCl and NH4H2PO4 < KCl and NH4Cl < KCl and (NH4)2HPO4. Regardless of the blended fertilizer, the permeate water flux of the effluent from the secondary sedimentation basin was the highest. The blended fertilizer of KCl and NH4H2PO4 was found to be most useful for the reuse of sewage because it contains nitrogen, phosphorus and potassium, which are the major components of a fertilizer, and has a low reverse solute flux. When the blend of KCl and NH4H2PO4 was used as a draw solution, the average permeate water and reverse solute flux for the secondary sedimentation basin effluent were 12.14 L/㎡hr and 0.012 mol/㎡s, respectively.

Effects of Pressure on r-Function of KCl in Water-Methanol Systems (물-에탄올 混合溶媒에서 KCl의 r-函數에 대한 壓力의 效果)

  • Jong Jae Chung;Hag Sung Kim;Oh Ryong Kwon;Seong Keuck Cha
    • Journal of the Korean Chemical Society
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    • v.37 no.3
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    • pp.279-286
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    • 1993
  • The effect of pressure on solvation of potassium chloride was studied by the density and viscosity measurements of water-methanol systems and the conductance measurements of KCl in this systems. These were used to calculate the r-function of KCl. It was found that the r-function of KCl which is 0.613 at 25$^{\circ}C$ and 1 bar in water was continuously decreased to the minimum point and enhanced with increasing the composition of methanol. At high pressure, the r-function of KCl was similar to that of normal pressure. But r-function decreased with increasing pressure at the specific component of methanol.

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Changes in the Properties of Myofibrillar Proteins from Broiler Meat during Cold and Frozen Storage (육계육의 냉장 및 동결저장 중 근원섬유 단백질의 특성 변화)

  • 박창식;문윤희
    • Korean Journal of Poultry Science
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    • v.14 no.2
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    • pp.137-143
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    • 1987
  • This study was carried out to compare the changes in the extractability, biological activity, and solubility of myofibrillar proteins and actomyosins during storage period at 4$^{\circ}C$ and -20$^{\circ}C$in pectoral. and leg muscle of broiler meat. 1. The results obtained are as fellows ; The extractabilities of myofibrillar proteins in pectoral and leg muscle were increased gradually to 7-days during storage at 4$^{\circ}C$ and decreased slightly during frozen storage at -20$^{\circ}C$. The extractabilities of actomyosins in pectoral and legmuscle were not greatly changed during cold storage and decreased gradually during frozen storage. 2. The Ca$\^$2+/-ATP ase activities of myofibrillar proteins in the both muscles were not greatly changed to 7-days during cold storage, and in the case of frozen storage, those were highest on the 2nd week, thereafter decreased with storage period. The Ca$\^$2+/-ATPase activities of actomyosins in pectoral and leg muscle were decreased sightly only frist day during cold storage and decreased gently during frozen storage. 3. Myofibrillar proteins in the both muscles were solubilized completely at 0.20M KCl in fresh meat, at 0.25M (pectoral) and 0.30M KCl (leg) in the cold storage, and at 0.30M KCl in the frozen storage. Actomyosins of both muscles were solubilized completely at 0.40M KCl in fresh meat, cold and frozen storage.

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A Basic Study on Separation of U and Nd From LiCl-KCl-UCl3-NdCl3 System (LiCl-KCl-UCl3-NdCl3 system에서 U 및 Nd 분리에 관한 기초연구)

  • Kim, Tack-Jin;Ahn, Do-Hee;Eun, Hee-Chul;Lee, Sung-Jai
    • Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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    • v.16 no.1
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    • pp.59-64
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    • 2018
  • In case of high contents of rare earths in the LiCl-KCl salt, it is not easy to recover U and TRU metals as a usable resource form from LiCl-KCl eutectic salts generated from the pyroprocessing of spent nuclear fuel. In this study, a conversion of $UCl_3$ into an oxide form using $K_2CO_3$ and an electrodeposition of $NdCl_3$ into a metal form in $LiCl-KCl-UCl_3-NdCl_3$ system were conducted to resolve the problem. Before conducting the conversion, experimental conditions for the conversion were determined by performing a thermodynamic equilibrium calculation. In this study, almost all of $UCl_3$ disappeared in the LiCl-KCl salt when the injection of $K_2CO_3$ reached theoretical equivalent for the conversion, and then $NdCl_3$ was effectively electrodeposited as a metal form using liquid zinc cathode. After that, the LiCl-KCl salt became transparent, and uranium oxides were precipitated to the bottom of the LiCl-KCl salt. These results will be utilized in designing a process to separate U and rare earths in LiCl-KCl salt.

Electric Conductivities of LaCl3-KCl Binary Melts (용융 LaCl3-KCl 2성분계 혼합염의 전기전도도)

  • Kim, Kiho
    • Journal of the Korean institute of surface engineering
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    • v.47 no.1
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    • pp.48-52
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    • 2014
  • Electric conductivities of $LaCl_3$-KCl binary melts have been measured by the Kohlausch bridge method over the range from their liquidus temperatures to about 1280 K. The electric conductivity increased with the content of KCl for all over the composition range of binary melts. The composition dependence of the electric conductivity and molar conductivity for the binary melt showed a non-linear relation from the additivity line, and the deviation showed a maximum value at about 60 mol.% KCl. The deviation implies the existence of complex ion of $LaCl^{4-}$ in the melt. Activation energy for electric conductivity of the binary melts decreased monotonously with increasing content of KCl.

Use of Li-K-Cd Alloy to Remove MCl3 in LiCl-KCl Eutectic Salt (Li-K-Cd 합금을 이용한 LiCl-KCl 용융염에서 금속염화물의 제거)

  • Kim, Gha-Young;Kim, Tack-Jin;Jang, Junhyuk;Kim, Si-Hyung;Lee, Chang Hwa;Lee, Sung-Jai
    • Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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    • v.16 no.3
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    • pp.309-313
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    • 2018
  • In this study, we prepared Li-K-Cd alloy, which meets the requirement of eutectic ratio of Li:K, to maintain the operating temperature of the drawdown process at $500^{\circ}C$ and to achieve the reuse of LiCl-KCl molten salt. The prepared Li-K-Cd alloys were added to LiCl-KCl salt bearing U and Nd at $500^{\circ}C$ to investigate the removal of $UCl_3$ in the salt. The reduction of $UCl_3$ in the salt was examined by measuring the OCP value of salt and analyzing the salt composition by ICP-OES. Reduction was also visually confirmed by change of salt color from dark purple to white. The experimental results reveal that the prepared Li-K-Cd alloy has reductive extractability for $UCl_3$ in salt. By improving the preparation method, the Li-K-Cd alloy can be applied to the drawdown process.