• Title, Summary, Keyword: TRC

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Effect of Acid Soaking and Thermal Sterilization on the Shape and Quality Characteristics of Tteokbokki Rice Cake (산침지와 가열 살균이 떡볶이 떡의 형상 변화와 품질 특성에 미치는 영향)

  • Jung, Hwabin;Yu, Chae Rin;Park, Hyeon Woo;Yoon, Won Byong
    • The Korean Journal of Food And Nutrition
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    • v.31 no.5
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    • pp.737-750
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    • 2018
  • Effects of acid soaking (AS) and thermal sterilization (TS) on the shape and quality characteristics of Tteokbokki rice cake (TRC) were investigated. The F-value of a sequential process (SP) of the combination of AS and TS was quantitatively determined with a reference microorganism of Bacillus cereus. F-values were evaluated according to the minimum and the maximum D-value of B. cereus and the reduction exponent (m=12). The heat penetration curves at cold point (CP) of TRC (400 g) were used to estimate the TS time at 121, 100, and $95^{\circ}C$. F-values of the SP were revised according to the adjusted m values after AS at different pH. The non-uniformity parameters (NUP) of TRC had no significant changes during AS but it dramatically increased after applying TS at a low pH by AS. The result of solubilized starch contents (SSC) demonstrated that the shape changes during SP are related to SSC. The texture characteristics and the whiteness were significantly influenced by a low pH condition (3.5) (p<0.05). Sensory analysis showed that a lower pH and a longer thermal processing time influenced negatively on the acceptability. This study showed that pH 4.0 and $95^{\circ}C$ was an optimum condition for the SP.

Analysis of Microwave Inverse Scattering Using the Broadband Electromagnetic Waves (광대역 전자파를 이용한 역산란 해석 연구)

  • Lee Jung-Hoon;Chung Young-Seek;So Joon-Ho;Kim Junyeon;Jang Won
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.17 no.2
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    • pp.158-164
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    • 2006
  • In this paper, we proposed a new algorithm of the inverse scattering for the reconstruction of unknown dielectric scatterers using the finite-difference time-domain method and the design sensitivity analysis. We introduced the design sensitivity analysis based on the gradient information for the fast convergence of the reconstruction. By introducing the adjoint variable method for the efficient calculation, we derived the adjoint variable equation. As an optimal algorithm, we used the steepest descent method and reconstructed the dielectric targets using the iterative estimation. To verify our algorithm, we will show the numerical examples for the two-dimensional $TM^2$ cases.

A Study on Effective Analysis Method of ITS(A Case of SUWON) (ITS 사업의 효과분석 방법론에 관한 연구(수원시를 중심으로))

  • Lee, Choul-Ki;Oh, Young-Tae;Lee, Hwan-Pil
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.6 no.2
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    • pp.81-94
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    • 2007
  • In order to solve the traffic problem which comes to be serious at day, the impotance of Intelligent Transport Systems(ITS) that accomplish information gathering, information processing, information offering with up-to-date scientific techniques is coming to be high. But many local self-government group want to solve the traffic problems with introduction of ITS, however, it is a actual condition where the systematic effective analysis is insufficient. This study establishes the methodology of effective analysis as introduction of ITS, which refers to the inside and outside of the country instance. And then, this research accomplishes direct and indirect effective analysis with the case study. As a result of SUWON ITS introduction effect analysis, the travel speed of TRC mode is increased 31%, and the delay of TRC mode is diminished 43.9% than before introducing case. Most of the citizen felt the improvement effect of ITS system operation, and the majority wanted the expansion of the ITS system in survey. The analysis of economic result that B/C ratio is 5.12. So, The the effect and economic propriety of the ITS enterprise appeared with the fact that it is sufficient.

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Isolation and Genotyping of Acanthamoeba spp. as Neglected Parasites in North of Iran

  • Shokri, Azar;Sarvi, Shahabeddin;Daryani, Ahmad;Sharif, Mehdi
    • The Korean Journal of Parasitology
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    • v.54 no.4
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    • pp.447-453
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    • 2016
  • Acanthamoeba, a free-living amoeba, is widely distributed in the environment, water sources, soil, dust, and air. It can cause keratitis in contact lens wearers with poor hygiene and also fatal granulomatous amebic encephalitis (GAE) in immunocompromised hosts. The aim of this study was to gain some insights into the distribution and genotypes of the potentially pathogenic species of Acanthamoeba present in water sources in north of Iran. Total 43 Acanthamoeba species were isolated from 77 water samples taken from different water sources within the Mazandaran province in Northern Iran (Sari city and suburbs). Isolates were identified based on cyst and trophozoite morphological characteristics as well genetics. PCR fragments corresponding to the small-subunit 18S rRNA gene were sequenced for 20 of 43 positive isolates. The results revealed that 83.3% of sequenced isolates belonged to the T4 genotype and the rest belonged to the T2 genotype. Our results indicated that Acanthamoeba is widely distributed in Sari city. As the incidence in Iran of amoebic keratitis has increased in recent years, the exact estimation of the prevalence of this amoeba and its predominant genotype may play a crucial role in prevention of the disease. Sari city has several rivers, seashores, and natural recreational amenities, which attract visitors during the year. This is the first report of Acanthamoeba genotypes from water sources in Sari city, Mazandaran province of Iran, and the results suggest that more attention is needed to protect the visiting population and immunocompromised individuals.

A Study on Tensile Restraint Crack Critical Stress Characteristcs of Gravity-Wet-Type Underwater Welded Joints (중력식 습식 수중용접부의 인강구속균열 임계응력 특성에 관한 연구)

  • O, Se-Gyu;Gang, Mun-Ho;Han, Sang-Deok
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.23 no.2
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    • pp.61-65
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    • 1987
  • In this study, the characteristics of TRC (tensile restraint crack) critical stress in the gravity type underwater wet welding process and in the in-air welding have been investigated for Y, y and 45$^{\circ}$r grooves using the KR Grade A-3 steel plates and the E4303 covered electrodes. The following results were obtained: (1) In the TRC tests, the initial critical stress of Y groove is higher than those of the 45$^{\circ}$r single bebel grooves in both in-air and underwater weldings, and the cold fracture sensitivity is higher in the underwater welding than in the in-air welding. (2) The hardness of underwater weld metal is the highest in heat affected zone is about Hk 365 in the in-air weld but Hk 670 in the underwater weld which is higher for cooling speed is more rapid, resulting in the lower critical stress by increase of fracture sensitivity. (3) The diffusible hydrogen quantity for 48 hours is about 18cc/100g-weld-metal in the in-air welding but 48cc/100g-weld-metal in the underwater welding. So that, in the case of underwater welding the diffusible hydrogen penetrates about 3 times more than that in the in-air welding.

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Past Affairs-Related Collective Memories and the Archival Justice : The Contemporary Rebuilding of the Archive on the Truth and Reconciliation Committee (과거사 집단기억과 '아카이브 정의' 진실화해위원회 아카이브의 동시대적 재구성)

  • Lee, Kyong Rae
    • The Korean Journal of Archival Studies
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    • no.46
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    • pp.5-44
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    • 2015
  • This article purposes to define archival justice and suggest democratic modeling of the archive on the Truth and Reconciliation Committee (TRC), which is focused on victims of state violence. These purposes come from critical mind that the absence of framework of the records management for collective memory would cause incorporation of TRC archives into mainstream archives systems in which voices of victims have been marginalized. This article intends to expand theoretical prospects of documentation of past affairs through applying humanistic and theoretical frameworks differently from institutional and policy approaches on restoration of collective memory. In order to do this, this article first considers archival justice as archives building in which state violence' victims are pivotal and then extracts theoretical frameworks for building the archives based on archival justice from recent discourses of post-colonial archives and community archives. As the next step, it criticizes current conditions of TRC archives in Korea on the basis of extracted theoretical frames and finally suggests realistic models in which each theoretical frame could be applied effectively into TRC archives that is focused on victims.

Effect of introduction of fumarase on the production of succinic acid

  • Hong, Sun-Ho;Lee, Sang-Yeop
    • 한국생물공학회:학술대회논문집
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    • pp.531-534
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    • 2000
  • The fumB gene encoding anaerobic fumarase of Escherichia coli XL1-Blue was introduced to solve the malic acid accumulation problem. When NZN111 harboring pTrcMLFu was cultured, 7 g/L of succinic acid was produced and malic acid was not accumulated.

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Circuit Modeling of Transition from Stripline to Dual Slotline for the Notch Antenna

  • So, Joon-Ho;Kim, Jun-Yeon;Lee, Moon-Que;Cheon, Chang-Yul
    • Journal of The Institute of Information and Telecommunication Facilities Engineering
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    • v.2 no.1
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    • pp.22-29
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    • 2003
  • A circuit model for the transition of stripline to dual slotline and a segmented method to analyze a notch antenna are presented. For the circuit model of the transition, the characteristic impedance, dispersions, and the shorted impedance of dual slotline are calculated and approximated with the closed-form expressions. The segmented analysis method allows to get readily an optimized results for the dual slotline-fed notch antenna. As a design example, a notch antenna is segmented into a 4'h order Marchand balun and a dual slot 134 notch antenna, and tested to show the validity of the proposed circuit model.

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Metabolic Flux Distribution in a Metabolically Engineered Escherichia coli Strain Producing Succinic Acid

  • Hong, Soon-Ho;Lee, Sang-Yup
    • Journal of Microbiology and Biotechnology
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    • v.10 no.4
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    • pp.496-501
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    • 2000
  • Escherichia cole NZN111, which is known as a pfl ldhA double mutant strin, was metabolically engineered to produce succinic acid by overexpressing malic enzyme into the E. coli controlled by a trc promoter. Fermentation studies were carried out in a LB medium by first growing cells aerobically to an $OD_{600}$ of 5. At this point, 0.01 mM IPTG was added to induce the overexpression of malic enzyme and the agitation speed was gradually lowered. When the culture $OD_{600}$ reached 11, a complete anaerobic condition was achieved by flushing with a $CO_3-H_2$ gas mixture. When NZN111(pTrcML) was cultured at $37^{\circ}C$, the final succinic acid concentration of 2.8 g/l could be obtained after 30 h of anaerobic cultivation. The fermentation results were analyzed by the calculation of metabolic fluxes. Metaolic flux analysis showed that about 85% of phosphoenolpyruvate (PEP) was converted to pyruvate, and further converted to malic acid by malic enzyme.

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