• Title/Summary/Keyword: Research and development

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The Morphological Study of Wild and Farmed Olive Flounder (Paralichthys olivaceus): The Role of Indirect Selection within and between Populations

  • Park, Jong-Won;Lee, Young-Mee;Noh, Jae-Koo;Kim, Hyun-Chul;Park, Choul-Ji;Hwang, In-Joon;Kim, Sung-Yeon;Lee, Jeong-Ho
    • Development and Reproduction
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    • v.16 no.4
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    • pp.309-314
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    • 2012
  • This study was conducted to analyze the difference of body types within and between wild and farmed populations of olive flounder Paralichthys olivaceus using measured records of morphological traits. The results showed that surveyed traits and standard deviation were $1,355{\pm}742g$ of body weight, $48.01{\pm}7.79cm$ of total length, and $40.96{\pm}6.80cm$ of body length. Also body height, body shape index and condition factor were $17.19{\pm}3.43cm$, $9.99{\pm}0.74$ and $11.16{\pm}1.54$, respectively. As result of least squares mean and standard error for each trait assumed in this study, those of farmed population showed significantly higher than those of wild population in all traits, exclusively in total length and body length (p<0.01). Particularly, the values of the body height and the body weight of the farmed population were higher than those of the wild population in the same total length. And the phenotypic correlation coefficients of the body weight, the total length, the body length and the body height showed strong positive correlation in all populations. These result suggested that morphological differences exist in farmed and wild flounder. Therefore, introduction of wild flounder is essential for the future production to improve the body type of farmed flounder, and parental fish should be chosen by considering selection of commercially important traits in the production process.

Effect of Ultra-sonication Treatment on the Quality Characteristics of Baked Eggs

  • Kang, Geunho;Seong, Pil-Nam;Cho, Soohyun;Ham, Hyoung-Joo;Kang, Sun-Moon;Kim, Dayae;Park, Beom-Young;Ba, Hoa Van
    • Food Science of Animal Resources
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    • v.36 no.4
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    • pp.458-462
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    • 2016
  • The effect of ultra-sonication on quality characteristics and flavor of baked eggs was studied. One hundred and twenty eggs were cooked and assigned to six treatments groups (n=20 each) that were then soaked in saline solution at various concentrations (5, 10 and 18%) with/or without further ultra-sonication treatment at 35 kHz for 1 h. The pH values were lower in the ultra-sonicated samples in comparison with the non-ultra-sonicated samples (p<0.05). The values for texture traits were higher in the samples soaked in 10% saline solution with ultra-sonication in comparison with other remaining treatments or control (p<0.05). The sodium content in samples soaked in 10% saline solution with ultra-sonication was similar to that of the ones soaked in 18% saline solution without ultra-sonication. The higher flavor scores were also given for the ultra-sonicated samples in comparison with the control or non-ultra-sonicated ones. These results suggest that the application of ultra-sonication may produce a faster sodium penetration into baked eggs, simultaneously improves some textural traits (e.g., hardness) as well as flavor of the products.

Promotion of Asexual Development and Inhibition of Sexual Development of Aspergillus nidulans by Short-Chain Primary Amines

  • Song, Myung-Hoon;Kuppusamy Selvam;Park, Chang-Jun;Jahng, Kwang-Yeop;Han, Dong-Min;Chae, Keon-Sang
    • Journal of Microbiology
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    • v.40 no.3
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    • pp.230-233
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    • 2002
  • Effects of short-chain primary amines on Aspergillus nidulans development were analyzed. Propylamine induced asexual development and inhibited sexual development. Even on medium containing lactose as the sole carbon source, on which little conidial heads are formed and sexual structures are formed preferentially, or when sexual development was induced, propylamine induced asexual development and inhibited sexual development. These effects of propylamine seemed to be due to accumulation of mRNA of the brlA gene, which has been identified as a positive regulator of asexual development, and due to the reduction of the veA mRNA level. The veA gene has been identified as an activator of sexual development and also as an inhibitor of asexual development. Other primary amines, methylamine and ethylamine, showed identical effects on development where short-chain primary amino also promoted asexual development and inhibited sexual development.

Double Side SMT and Molding Process Development for mPossum Package

  • Kim, ByongJin;Cho, EunNaRa;Kim, ChoongHoe;Lee, YoungWoo;Lee, JaeUng;Ryu, DongSu;Jung, GyuIck;Kang, DaeByoung;Khim, JinYoung;Yoon, JuHoon;Kim, Sun-Joong
    • Journal of the Microelectronics and Packaging Society
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    • v.23 no.4
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    • pp.43-48
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    • 2016
  • 3-Dimensional System in Package (3-D SiP) structure (Amkor calls it mPossum-molded Possum) using double side Surface Mount Technology (SMT) and double side molding was evaluated in order to achieve small/thin form factor as well as good functionality by integration and double side layout. As the new platform on laminate substrate basis, molding process was challenge in mold flow balance at top and bottom side and package warpage control over the overall assembly process. There were two types of different molding process evaluated with 1) 1-step molding which was done at both side at the same time and 2) 2-step molding which was done at the conventional molding process twice. Mold simulation helped to narrow down the material selections and parameters available before actual sample build. There were many challenges for this first trial in design/ parameter and material types but optimized them to enable this structure.

Toxicity Assessment of Ocean Dumping Wastes Using Fertilization and Embryo Development Rates in the Sea Urchin (Strongylocentrotus nudus) (둥근성게(Strongylocentrotus nudus)의 수정 및 배 발생률을 이용한 해양배출 폐기물의 독성평가)

  • Hwang, Un-Ki;Rhee, Choong-Won;Kim, Kwang-Seop;Kim, Hyoung-Choul;An, Kyoung-Ho;Park, Seung-Youn
    • Environmental Analysis Health and Toxicology
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    • v.24 no.1
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    • pp.25-32
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    • 2009
  • Toxicity of ocean dumping wastes(dye waste, urban sewage, food waste) were examined by observing fertilization and embryo development rates of the Sea Urchin, Strongylocentrotus nudus. Spawning was induced by injecting 1 mL of 0.5 M KCl into coelomic cavity. Males released white or cream-colored sperms and females released yellow or orange-colored eggs. Experiments were began within 30 min after the collection of both gametes. The fertilization and embryo development rates tests were performed for 10 min and 48 h after fertilization, respectively. The fertilization and embryo development rates in the control condition(not including ocean dumping wastes sludge elutriate) were greater than 90%, but markedly decreased with increasing concentrations of ocean dumping waste sludge elutriate. The fertilization and normal embryogenesis rates were significantly inhibited in all waste sludge elutriate from dye waste($EC_{50}$=5.76; $EC_{50}$=4.53), urban sewage($EC_{50}$=9.82; $EC_{50}$=9.67) and food waste($EC_{50}$=3.90; $EC_{50}$=3.27), respectively. The NOEC(>3.13%) and LOEC(3.13%) of fertiliztion and normal embryogenesis rates very similar in all waste sludge elutriate. These results suggest biological assay using the fertilization and embryo development rates of S. nudus are very useful test method for the ecological toxicity assessment of ocean dumping wastes.

Determinants of Technology Transfer and Commercialization in National Research and Development: Focusing on Korea Railroad Research Projects

  • Baek, Seunghee;Hwang, Sungup;Park, Young Il
    • Asian Journal of Innovation and Policy
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    • v.7 no.3
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    • pp.438-456
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    • 2018
  • This study aims to understand the importance of commercialization of research and development projects and examines key factors that allow successful technology transfer and commercialization. Given the characteristics of the railway research project, and assuming that R&D input factors would vary depending on the technology readiness level and the degree of research convergence, this study analyzes the moderating effect of each R&D input factor on technology transfer and commercialization to determine their eventual impact. Through this study, it was found that it was necessary to proceed to technology transfer and commercialization of the national research and development projects via strategic workforce composition and allocation of research funding given the subjects and development goals of R&D projects.