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Chemical Interaction of L-Ascorbic Acid with Ferritin Molecule (가시부영역의 흡수 스펙트럼 변화에 의한 L-Ascorbic Acid와 Ferritin과의 상호작용)

  • 김미옥;나재철;장상문
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.33 no.3
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    • pp.542-548
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    • 2004

  • This study consisted of designing a sensitive assay to measure the rate of L-ascorbic acid (AsA)-prompted release of ferritin iron, the use of ferrozine as a chelating agent to trap releases Fe(II). The initial rate of iron release was measured in the appearance of Fe(ferrozine)$_3$$^{2+}$ at 562 nm. The release of iron from ferritin by AsA was dependent on time and AsA conditions under aerobic and anaerobic conditions. Effect of oxygen on the release of iron from ferritin was also confirmed. It was suggested that the release of iron from ferritin was participate not only AsA but also $O_2$$^{[-10]}$ . In this study, it was found that iron can be released from ferritin and chelate as Fe(ferrozine)$_3$$^{2+}$ and the release was more than 50% in the presence of AsA without $O_2$$^{[-10]}$ . Based on the findings, the following can be assumed (1) AsA is diffused into ferritin (2) ferric ion is reduced to ferrous ion (3) is diffused from ferritin.tin.

  • https://doi.org/10.3746/jkfn.2004.33.3.542 인용 PDF KSCI

Application of Adsorption Characteristic of Ferrous Iron Waste to Phosphate Removal from Municipal Wastewater (폐산화철의 흡착특성을 이용한 도시하수내 인 처리)

  • Kim, Jin-Hyung;Lim, Chae-Sung;Kim, Keum-Yong;Kim, Dae-Keun;Lee, Sang-Ill;Kim, Jong-Soo
    • Korean Journal of Environmental Agriculture
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    • v.27 no.3
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    • pp.231-238
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    • 2008

  • This study proposed the method of phosphate recovery from municipal wastewater by using ferrous iron waste, generated from the mechanical process in the steel industry. In the analysis of XRD, ferrous iron waste was composed of $Fe_3O_4$ (magnetite), practically with $Fe^{2+}$ and $Fe^{3+}$. It had inverse spinel structure. In order to identify the adsorption characteristic of phosphate on ferrous iron waste, isotherm adsorption test was designed. Experimental results were well analyzed by Freundlich and Langmuir isotherm theories. Empirical constants of all isotherms applied increased with alkalinity in the samples, ranging from 1.2 to 235 $CaCO_3/L$. In the regeneration test, empirical constants of Langmuir isotherm, i.e., $q_{max}$ (maximum adsorption capacity) and b (energy of adsorption) decreased as the frequency of regeneration was increased. Experiment was further performed to evaluate the performance of the treatment scheme of chemical precipitation by ferrous iron waste followed by biological aerated filter (BAF). The overall removal efficiency in the system increased up to 80% and 90% for total phosphate (TP) and soluble phosphate (SP), respectively, and the corresponding effluent concentrations were detected below 2 mg/L and 1 mg/L for TP and SP, respectively. However, short-circuit problem was still unsolved operational consideration in this system. The practical concept applied in this study will give potential benefits in achieving environmentally sound wastewater treatment as well as environmentally compatible waste disposal in terms of closed substance cycle waste management.

  • https://doi.org/10.5338/KJEA.2008.27.3.231 인용 PDF KSCI

Ecophysiological Responses and Subsequent Recovery of Olive Flounder, Paralichthys olivaceus, Exposed to Hypoxia and Iron. I. Effect of Iron Concentration on the Growth of Olive Flounder (빈산소와 철에 대한 넙치, Paralichthys olivaceus의 생태생리적 반응 및 회복 I. 넙치의 성장에 미치는 철의 영향)

  • KANG Ju-Chan;KIM Chang-Hoon
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.32 no.3
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    • pp.353-358
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    • 1999

  • This study is to find out the effects of various iron concentrations on growth, feeding and feed efficiency of olive flounder, Paralichthys olivaceus, The growth rate, feeding rate and feed efficiency of olive flounder in each experiments were represented by the relative value. The relative growth rate and relative feed efficiency of olive flounder were kept almost constant below the iron concentration of 1.0 mg/$\ell$, but were significantly decreased above the 5,0 mg/$\ell$ iron concentration. The growth rate, feeding rate and feed efficiency of olive flounder exposed to 10.0mg/$\ell$ iron concentration were significantly decreased than that exposed to normal condition. From these results, it could be concluded that the high level of 5.0 mg/$\ell$ iron concentration in the bottom water would curtail production of olive flounder in coastal area.

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