• Title/Summary/Keyword: 수분흡수

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Hydration Properties of Naked Barley by Kernel Sizes (쌀보리의 입자별 수분 흡수 특성)

  • Yun, Young-Jin;Kim, Kwan;Kim, Sung-Kon;Kim, Dong-Youn;Park, Yang-Kyun
    • Applied Biological Chemistry
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    • v.31 no.1
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    • pp.13-20
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    • 1988
  • The hydration characteristics of four naked baley varieties by different kernel sizes were investigated. The predominant kernel size was 7 mesh, followed by 10 mesh kernel, of which comprised $86{\sim}94%$ of the total kernel. Diffusion coefficients of naked barleys at $40^{\circ}C$ increased as the kernel sizes decreased. The volume increases of naked barleys were linearly related to the moisture gain, regardless variety and kernel size.

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Effect of Water Condition and Air Circulation on Fruit Fermentation of Oriental Melon (Cucumis melo L. var. makuwa Makino) (수분조건 및 송풍처리가 참외의 발효과 발생에 미치는 영향)

  • Shin, Yong-Seub;Seo, Young-Jin;Yeon, Il-Kweon;Do, Han-Woo;Choi, Chung-Don;Park, So-Deuk;Kim, Byung-Soo
    • Journal of Bio-Environment Control
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    • v.16 no.4
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    • pp.333-337
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    • 2007
  • This study was conducted to assess effects of soil moisture condition and ventilation on development of fermented fruit of oriental melon. In higher soil moisture condition (-10 kPa), roots absorbed more water and transpiration was decreased under low temperature and high humidity conditions. Development of fermented fruit may be come from absorbed water concentrated placenta with higher soluble solid. Fermented fruit was developed with higher level at Shintozoa and Elite, was developed with lower level at Hongtozoa, and was not developed at self-rooting of oriental melon. Ventilation on fruit did not affect development of fermented fruit at Shintozoa, Elite, Hongtozoa and self-rooting seedling. Ca contents of flesh and placenta of fruit under ventilation treatment were higher than control but contents of Acetaldehyde, Ethanol and Ethylacetate were lower.

Effect of Different Steaming and Drying Temperature Conditions on Physicochemical Characteristics of Pumpkin Powder (증숙 및 건조 조건이 호박 분말의 이화학적 특성에 미치는 영향)

  • Shin, Dong-Sun;Yoo, Seon-Mi;Park, Bo-Ram
    • Korean Journal of Food Science and Technology
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    • v.45 no.6
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    • pp.742-746
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    • 2013
  • This study was conducted to investigate the effect of different steaming and drying temperature conditions on the physicochemical characteristics of pumpkin powder. All the samples were steamed for 30 or 60 s and then were dried using hot air at 40, 50, 60, and $70^{\circ}C$. The moisture content decreased with an increase in the hot-air drying temperature, while the soluble solid content and yield increased. The color values, L, a, and b of the pumpkin powder decreased with increasing hot-air drying temperature. The pumpkin powder, which was steamed for 60 s had the highest water absorption and water solubility indexes. The carotenoid content of pumpkin powder was mostly destroyed with the increase in the steaming and drying temperatures. The total sugar and reducing sugar contents increased with increasing steaming and drying temperatures. Thus, the steaming and dehydration temperature conditions influenced the physicochemical characteristics of the pumpkin powder.

Synergistic Effect of Oxygen Pressure and Sonophoresis for Skin Permeability (산소 압력과 초음파를 이용한 피부투과도 증대에 관한 연구)

  • 차민석;이철규;윤영로;이원수
    • Journal of Biomedical Engineering Research
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    • v.23 no.3
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    • pp.189-196
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    • 2002
  • Transdermal drug delivery offers an alternative method to the conventional oral and injection delivery method. Its advantages include its ability to deliver drugs directly into systemic circulation. However, there have been restrictions in its application to deliver drugs because of the skin's barrier function. In this study, we try to combine a Sonophoresis and oxygen Pressure method in order to increase the Permeability of the skin. we used water as the compound and by utilizing the skin impedance method. we measured the hydration Permeability of skin Ultrasound was applied using a sonicator(Solcare-U1000. Solco, Korea) operating at a frequency of 1MHz. oxygen Pressure was applied using a compressor(Oxyjet-Pointer, Nora Bode. Germany) operating at a pressure of 2Bar/cm2. Experiment was performed in vivo for 42 People. We divided the subjects into four smaller groups. A different transdermal drug delivery method was applied for each group on the back of their hand. We measured the skin impedance variations on the hand. during a 20-minute time Period. The control group did not show any significant increase or variation of skin impedance to water. In comparison to the control group(Passive diffusion) the hydration Permeability of the ultrasound group and the oxygen Pressure group was approximately 25 and 30 times higher consecutively. Futhermore, the hydration permeability of the combination of ultrasound and oxygen Pressure group was about 70-fold higher in comparison to the control group(passive diffusion) . The results reveal that a combination of ultrasound and oxygen Pressure will significantly enhance transdermal water transport compared when only one of them is used.

Influence of Soaking Time of Paddy Straw on the Mycelial Growth of Oyster Mushroom, Pleurotus spp. (배지의 침수조건이 느타리버섯의 균사생장에 미치는 영향)

  • Jhune, Chang-Sung;Choo, Chang-Ho;Chang, Gap-Yeul;Paik, Su-Bong
    • The Korean Journal of Mycology
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    • v.28 no.2
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    • pp.67-72
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    • 2000
  • The purpose of this study was to investigate the change of water content in mushroom substrate, paddy straw, and the mycelial growth of oyster mushroom by various soaking time. The water content of paddy straw was gradually increased as the soaking time was getting longer. These experiments also showed that the water content in the upper part of paddy straw was less than that of the low part. The mycelial growth was the good between 4 and 12 hours soaking treatment, showing faster growth and higher density in the lower part than the upper part. However we could not found any significant variation among 5 strains of oyster mushroom in the effects of the various soaking times and soaking part. The pH of the lower part substrates had a low pH compared with that of the upper part. When pathogens and mushroom mycelia were co-inoculated on paddy straw under various soaking conditions, the mushroom mycelial growth showed fast and high density according to the increase of the soaking time. The experiment related to water transport reveals that it is not easy to move into upper part, but only soaked part by adding water is available to absorb enough water. Old straw was much better than the straw new this year one for water absorption, mycelial growth and mycelial density.

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Quality Characteristics of Domestic Strong Wheat Flour (시판 강력분 우리밀의 품질 특성)

  • Kwak, Han Sub;Kim, Mi Jeong;Kim, Oui-Woung;Kim, Sang Sook
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.46 no.5
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    • pp.616-621
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    • 2017
  • The objective of this study was to investigate the physicochemical properties of domestic strong wheat flour (DSWF). Three commercial DSWFs (D1, D2, and D3) were compared with imported strong wheat flour (ISWF). DSWFs had higher moisture content, crude protein content, lightness, and whiteness than ISWF. DSWFs showed lower solvent retention capacity and water absorption index than ISWF. DSWFs also showed significantly higher water solubility index than ISWF (P<0.05). Setback values by rapid visco analysis were significantly higher in D1 and D2 than in ISWF and D3, which means ISWF and D3 were better in retarding retrogradation. Differential scanning calorimetry results showed that ISWF required 6.2 J/g of energy for phase transition, whereas DSWFs needed 6.67~7.13 J/g. The farinograph results showed that ISWF had higher water absorption, longer dough stability time, and significantly higher softening of dough at 20 min than DSWF (P<0.05). Dough resistance and extensibility were higher in ISWF than in DSWFs.

Analysis of CO2 Capture Efficiency in Relation to the Inlet Moisture Content of the Regenerator in the Continuous Process by using Sorbent Analysis (연속공정에서 고체흡수제의 입자분석을 통한 재생반응기 주입 수분량에 따른 CO2 회수효율 영향 분석)

  • Lee, Do-Young;Kim, Ki-Chan;Park, Young Cheol;Han, Moon-Hee;Yi, Chang-Keun
    • Korean Chemical Engineering Research
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    • v.50 no.4
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    • pp.654-658
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    • 2012
  • In this study, $CO_2$ capture efficiency in relation to the inlet moisture content of the regenerator was investigated using potassium-based sorbents in the continuous process composed of two bubbling fluidized-bed reactors, where solid outlet configuration in the regenerator was converted from underflow to overflow. XRD (X-ray Diffraction), SEM (Scanning Electron Microscope) and TGA were performed to find out the effect of water pre-treatment according to inlet moisture content in the regenerator. The $K_2CO_3{\cdot}1.5H_2O$ structure of solid sorbents has been increased as inlet moisture content of the regenerator increased. As a result, the $CO_2$ capture efficiency increased as the $K_2CO_3{\cdot}1.5H_2O$ structure of solid sorbents increased since the reactivity of the sorbents has been improved by that structure generated by the water pre-treatment. And $CO_2$ capture efficiency increased about 3~8% after sorbent outlet configuration of the regenerator was changed underflow to overflow.

Preliminary Experimental Study for Water Recovery and Particulate Matter Reduction through a Hybrid System that Combines Exhaust Cooling and Absorption from Ships (선박배출 배기냉각과 흡수식이 결합된 하이브리드 시스템을 통한 물 회수 및 미세먼지 저감을 위한 기초실험연구)

  • Youngmin Kim;Donggil Shin;Younghyun Ryu
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.28 no.7
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    • pp.1252-1258
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    • 2022
  • The exhaust gas from the marine engines include a quantity of water vapor and particulate matter. The total particulate matter includes filterable particulate matter (FPM) and condensable particulate matter (CPM) that condense after releasing into the atmosphere. The portion of CPM is higher than that of FPM that is removable through the filter before discharging. An experimental setup for waste heat and water recovery and removal of CPM in the exhaust gas was tested using an industrial gas boiler in the laboratory. The water and CPM in the exhaust gas were removed through the first stage of cooling method and further removed through the second stage of absorption method. The efficiencies of water recovery were 73% after the first stage of cooling method and 90% after the second stage of absorption method. At the same time, the CPM was removed by 80-90% through the processes. The waste heat recovered could be used to process heat, and the water recovered could be used to process water in the ship. Furthermore, the CPM, which is a major source of the particulate matter but not subject to administrative regulation, could be removed effectively.