Kim, Seog-Ku;Lee, Mi-Kyung;Ahn, Jae-Hwan;Kang, Sung-Won;Kim, Young-Im
Journal of Korean Society of Environmental Engineers
/
v.28
no.5
/
pp.563-572
/
2006
In order to propose optimum in-situ treatment for reducing phosphorous release from sediment of stationary lakes, a series of column tests were performed. The sediment used in experiment was very fine clay with a mean grain site $7.7{\phi}$ and high $C_{org}$ contents(2.4%). Phosphorous releases were evaluated in two ways : in lake water(with microbial effect) and in distilled water(without microbial effect). As in-situ capping material, sand and loess were used while Fe-Gypsum and $SiO_2$-Gypsum were used for in-situ chemical treatment. In case of lake water considering the effect of microorganism, phosphorous concentration rapidly decreased in the early stage of experiment but it was gradually increased after 10 days. Flux of phosphorous release for control was $3.0mg/m^2{\cdot}d$. Whereas, those for sand layer capping(5 cm) and loess layer capping(5 cm) were $2.5mg/m^2{\cdot}d\;and\;1.8mg/m^2{\cdot}d$, respectively because the latter two were not consolidated sufficiently. For Fe-gypsum and $SiO_2$-gypsum the fluxes were $1.4mg/m^2{\cdot}d$ which meant that reduction efficiency of phosphorous release was more than 40% higher than that of control. The case capping with complex layer was $1.0mg/m^2{\cdot}d$, which showed high reduction efficiency over 60%. The addition of gypsum($CaSO_4{\cdot}2H_2O$) into the sediment reduced release of Phosphorus from the sediments. Gypsum acted as a slow-releasing source of sulphate in sediment, which enhanced the activity of SRB(sulfate reducing bacteria) and improved the overall mineralization rate of organic matter.
Park, Sung-Jin;Seong, Dong-Ho;Park, Dong-Sik;Kim, Seung-Seop;Gou, Jing-Yu;Ahn, Ju-Hee;Yoon, Won-Byung;Lee, Hyeon-Yong
Journal of the Korean Society of Food Science and Nutrition
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v.38
no.3
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pp.396-400
/
2009
Dodok (Codonopsis lanceolata Bench. et Hook) root contains abundant pharmaceutical substances and is widely used as a food and a medicinal herb. To identify the major components, fermented Codonopsis lanceolata was analyzed for its chemical compositions prior to their pharmaceutical substances, which were used as the fundamental data. The contents of carbohydrate, crude protein, crude lipid and ash are 79.3%, 13.0%, 2.40% and 5.3%, respectively. The calories of fermented Codonopsis lanceolata was 390.5 kcal. Total dietary fiber was 47.4% of total carbohydrates. The protein was composed of 18 different amino acids. The contents of essential and non-essential amino acids were 8,118.18 mg and 10,913.42 mg. The K was the largest mineral followed by P, Ca and Mg, which means fermented Codonopsis lanceolata is alkali material. The contents of saturated fatty acids, monounsaturated fatty acids and polyunsaturated fatty acids were 37.76%, 3.84%, and 35.64%, respectively. Therefore, the amount of the total unsaturated fatty acid was higher than that of any other plant. The content of crude saponin in fermented Codonopsis lanceolata was 60.1 mg/g. It is expected that a follow up study on fermented Codonopsis lanceolata through development and evaluation of processed foods for their functional properties would provide useful information as a source of medicinal foods.
Jang, Yeon-Jeong;Kim, Eun-Ju;Kim, So Young;Lee, Yun Hye;Park, Shin-Young
Food Science and Preservation
/
v.23
no.5
/
pp.680-688
/
2016
This study analyzed the changes in physicochemical components of Astragalus membranaceus (AM) fermented with Phellinus linteus. Moisture content, pH, total acidity, total reducing sugar content, extraction yield, free sugar content, free amino acid and isoflavonoid (calycosin, formononetin) were investigated. The moisture content was increased during fermentation with Phellinus linteus. The pH level increased while the total acidity significantly decreased during fermentation. The reducing sugar content were in the range of 0.32~0.61%. The extraction yield using water was higher than that using 80% ethanol. The major free sugars were identified as glucose, fructose, sucrose and the content of free sugars decreased through fermentation. However, the glucose and sucrose contents of the water extracts were increased. In addition, the free amino acid increased significantly during fermentation. Finally, calycosin and formononetins contents in water extracts of after 30 days of AM fermentaion with Phellinus linteus were (3.91 mg/100 g) and (1.38 mg/100 g), respectively. These results suggest that fermentation with Phellinus linteus could be used to increase the bioactivity of AM. The mycelium-fermented AM could be a valuable source of functional material and edible resource for industry.
Inflammation is the first response of the immune system to infection or irritation in our body. The use of medicinal plants has been widely applied as an alternative source for drug development. One of marine natural resources, the anti-inflammatory effect of Ishige sinicola ethanol extract (ISEE), was evaluated by using LPS-induced RAW 264.7 cell and mice model. As a result, the production of nitric oxide (NO) and pro-inflammatory cytokines (IL-6, IL-$1{\beta}$, TNF-${\alpha}$) were inhibited with increasing concentration of ISEE without any cytotoxicity. Furthermore, ISEE suppressed the expression of not only inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2), nuclear factor-kappa B (NF-${\kappa}B$) p65, and mitogen-activated protein kinases (MAPKs), including extracellular signal-regulated kinase (ERK) 1/2, p38, and c-Jun N-terminal kinase (JNK) in a dose-dependent manner. In mice ear edema test, the formation of edema was reduced at the highest dosage of ISEE and the reduction of the number of infiltrated mast cells was observed in histological analysis. These results indicate that ISEE has a potent anti-inflammatory activity and can be used as a pharmaceutical material for many kinds of inflammatory disease.
Journal of the Institute of Electronics Engineers of Korea SD
/
v.48
no.6
/
pp.1-6
/
2011
A transparent oxide thin film transistors (Transparent Oxide-TFT) have been fabricated by RF magnetron sputtering at room temperature using amorphous indium zinc oxide (a-IZO) as both of active channel and source/drain, gate electrodes and co-sputtered $HfO_2-Al_2O_3$ (HfAIO) as gate dielectric. In spite of its high dielectric constant > 20), $HfO_2$ has some drawbacks including high leakage current and rough surface morphologies originated from small energy band gap (5.31eV) and microcrystalline structure. In this work, the incorporation of $Al_2O_3$ into $HfO_2$ was obtained by co-sputtering of $HfO_2$ and $Al_2O_3$ without any intentional substrate heating and its structural and electrical properties were investigated by x-ray diffraction (XRD), atomic force microscopy (AFM) and spectroscopic ellipsometer (SE) analyses. The XRD studies confirmed that the microcrystalline structures of $HfO_2$ were transformed to amorphous structures of HfAIO. By AFM analysis, HfAIO films (0.490nm) were considerably smoother than $HfO_2$ films (2.979nm) due to their amorphous structure. The energy band gap ($E_g$) deduced by spectroscopic ellipsometer was increased from 5.17eV ($HfO_2$) to 5.42eV (HfAIO). The electrical performances of TFTs which are made of well-controlled active/electrode IZO materials and co-sputtered HfAIO dielectric material, exhibited a field effect mobility of more than $10cm^2/V{\cdot}s$, a threshold voltage of ~2 V, an $I_{on/off}$ ratio of > $10^5$, and a max on-current of > 2 mA.
Journal of Korean Society of Environmental Engineers
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v.22
no.1
/
pp.61-71
/
2000
When irradiate the power ultrasound into the aqueous solutions, water vapor is decomposed by the heat of very high temperature in the cavitation bubble to produce OH (hydroxyl radical) and H (hydrogen radical), and these radicals play a role in decomposing the substances in aqueous solution by oxidation and/or reduction, and in producing the hydrogen peroxide. Accordingly it is possible to predict that the quantity of hydrogen peroxide produced may correlate with the sonolysis mechanism of the substance in aqueous solution. Thus to confirm this prediction, the quantities of hydrogen peroxide produced from each of the air saturated distilled water and three aqueous solutions of TCE, benzene, and 2,4-DCP that are prepared by dissolving them into distilled water are measured. As a result, it showed that the quantity of hydrogen peroxide produced from the distilled water and three aqueous solutions are increased in order of distilled water>TCE solution>2,4-DCP solution>benzene solution, and decrease with decrease in concentration of organic substance, which coincide with the sonolysis mechanisms reported that TCE in aqueous solution is decomposed directly by the pyrolysis in and around the cavitation bubbles when its concentration is high and by the radical reaction when low, however, benzene and 2,4-DCP are decomposed not only by the pyrolysis but also by the radical reactions. Effects of such experimental parameters as the acoustic frequency and power and as the concentration showed that the higher the acoustic frequency and the lower the acoustic power, the less the quantity of hydrogen peroxide was produced. This result coincide with the theory of ultrasound for the relation between the cavitation that is the energy source of the power ultrasound in aqueous solution and these experimental parameters.
Joo, Yeong-Hee;Jeon, Yong-Woon;Calilung, Edwin J.;Elepano, Arnold R.
Korean Journal of Soil Science and Fertilizer
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v.18
no.4
/
pp.325-335
/
1985
Biogas production from agricultural wastes were summarized as follows: 1. Biogas Generation Characteristics of Various Manures and Residues a. Gas yield from crop residues like rice straw, rice hull, corn stalk and coconut husk can be improved by addition of animal manures. b. Gas yield from coconut husk can be improved through aerobic fermentation for at least one week before loading in the digester. c. Gas yield from fresh rice straw is better than from pre-fermented one, whether alone or in combination with animal manures. d. Initial study has shown that fresh azolla can be substituted for animal manures in manurerice straw combinations and gas yield derived based on unit volatile solids loaded is actually better than for manure-residue combinations. e. Gas production is highly sensitive to substrate pH and becomes almost nil at a pH of below 6. 2. Effect of ambient conditions and other factors on biogas production in a house hold-size digester. a. Results showed that compaction of rice straw in straw-manure combination can reduce gas yield compared with loosely mixed straw. b. The effective gas production period extended to 70 days using freshly threshed rice straw and fresh cattle manure as feed material. c. Underground and above ground digesters with shade have relatively more stable substrate temperature than aboveground exposed digesters. This relative temperature instability may likely be the reason for lower gas yield for the exposed aboveground digester loaded with loose straw-cattle manure substrate, compared with the underground digester with the same substrate. 3. Economic Analysis a. Based on prevailing costs of fuel, materials, and labor in the Philippines, biogas produced from the household size system is cheaper than either LPG or kerosene. b. If other benefits like organic fertilizer, pollution control and convenience are considered, biogas will surely be the best alternative fuel source.
This study aimed to fundamentally understand structural changes of zeolite under pressure and in the presence of different pressure-transmitting media (PTM) for application studies such as immobilization of heavy metal cation or CO2 storage using pressure. High-pressure X-ray powder diffraction study was conducted on the zeolite-W (K6.4Al6.5Si25.8O64× 15.3H2O, K-MER) to understand linear compressibility and the bulk moduli in different PTM conditions. Zeolite-w is a synthetic material having the same framework as natural zeolite merlinoite ((K, Ca0.5, Ba0.5, Na)10 Al10Si22O64× 22H2O). The space group of the sample was identified as I4/mmm belonging to the tetragonal crystal system. Water, carbon dioxide, and silicone-oil were used as pressure-transmitting media. The mixture of sample and each PTM was mounted in a diamond anvil cell (DAC) and then pressurized up to 3 GPa with an increment of ca. 0.5 GPa. Pressure-induced changes of powder diffraction patterns were measured using a synchrotron X-ray light source. Lattice constants, and bulk moduli were calculated using the Le-Bail method and the Birch-Murnaghan equation. In all PTM conditions, linear compressibility of c-axis (𝛽c) was 0.006(1) GPa-1 or 0.007(1) GPa-1. On the other hand, the linear compressibility of a(b)-axis (𝛽a) was 0.013(1) GPa-1 in silicone-oil run, which is twice more compressible than the a(b)-axis in water and carbon dioxide runs, 𝛽a = 0.006(1) GPa-1. The bulk moduli were measured as 50(3) GPa, 52(3) GPa, and 29(2) GPa in water, carbon dioxide, and silicone-oil run, respectively. The orthorhombicities of ac-plane in the water, and carbon dioxide runs were comparatively constant, near 0.350~0.353, whereas the value decreased abruptly in the silicone-oil run following formula, y = -0.005(1)x + 0.351(1) by non-penetrating pressure fluid condition.
In this paper, the author interprets Juyeok (The Book of Changes) as a philosophical book on self-culture instead of a book on divination. Juyeok, originally, was a book on divination written to tell fortunes; however, it has been a rich source producing the discourse of the humanities. This is because it has a unique system of linguistic symbols. Gwae-Hyo (Hexagrams and Horizontal Lines) system of Juyeok has a number of symbolic features, and there is too much room for new philosophical, cultural interpretations. Thus, Juyeok can be applied to any information and events, and it can, accordingly, help solve the problems of life we are facing. Moreover, Juyeok's unique characteristics are revealed very well in active intervention of persons who read and interpret it. Carl Gustav Jung is the very person who argued that one should interpret Juyeok through this active intervention. In the foreword of Juyeok translated by Richard Wilhelm, he mentions a possibility of the interpretation of Juyeok applying 'synchronicity.' According to him, Juyeok is a material not to predict the future or tell the fate ordained, but to look back on oneself or find the solutions of problems oneself. It allows the inquirer to interpret Gwae-Hyo-Sa (Explanations) not simply through the result of fortune-telling but the act of telling one's fortune. He applies 'synchronicity' to the finding of answers to one's problems in the given Gwae-Hyo-Sa. Synchronicity refers to 'the principle of non-causal relationship explaining a phenomenon of meaningful coincidence.' Here, simultaneity, unlike contingency the principle of causality refers to, means 'meaningful coincidence.' He presents a theory that the divination signs derived from Gwae-Hyo-Sang (Images) through synchronicity is a reflection of the psychology of the unconscious the fortune-teller or a man who receives the results of the divination signs has under certain circumstances on the outside. This is because Jung interprets it like this because the way of communication of Juyeok using symbolic language is not direct but indirect. Juyeok's system of symbolic language aims not at delivering objective knowledge, but the reader's self-transformation. This point can be applied in clinical philosophy. People who suffer from agony and pain in their daily lives may find meaningful and helpful advice for themselves no matter what Gwae-Hyo-Sa they choose in Juyeok. This is because it was originally hidden in their inner space and just revealed concretely through Gwae-Hyo-Sang or Gwae-Hyo-Sa in Juyeok. In this sense, we connect the meaning Gwae-Hyo-Sang or Sa contains from Juyeok to their circumstances, read counsel or advice needed ourselves and make it our own to be able to have power to change and help ourselves. And at this very point may be evaluated as an important role of Juyeok.
Insects have been investigated as a novel source of food and biomaterial in several recent studies. However, their osteoblastogenic cell activity has not been sufficiently researched and so, to investigate the potential of this natural material for promoting osteoblastogenesis, we studied the activity of Locusta migratoria ethanol extract (LME) on MG-63 pre-osteoblast cells. The cytotoxicity and proliferation effects of LME on MG-63 cells were measured by MTS assay, and there was no cytotoxicity up to $1,000{\mu}g/ml$. With LME treatment of 500 and $1,000{\mu}g/ml$ for 48 hr, cell proliferation increased to 105% and 116% versus control, respectively. The osteoblastogenic activity of the LME was measured through alkaline phosphatase (ALP) staining at three and five days. As a result, both 500 and $1,000{\mu}g/ml$ LME concentrations were seen to increase ALP activity by more than three times compared with control at three and five days. In addition, the expression level of the osteogenic markers ALP and RUNX2 was markedly increased after LME treatment. These results demonstrate that Locusta migratoria ethanol extract promotes osteoblastogenesis as evidenced by the increased osteogenic markers and suggest that LME may be a potential agent for bone formation and osteoporosis prevention.
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