• Title/Summary/Keyword: Mixed

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Dynamics of Mixed-Cultures of Gluconobacter suboxydans and Saccharomyces uvarum

  • Paik, Hyun-Dong;Oh, Doo-Whan
    • Preventive Nutrition and Food Science
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    • v.2 no.1
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    • pp.66-70
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    • 1997
  • A mixed-culture of Gluconobacter suboxydans IFO 3172 and Saccharomyces uvarum IFO 0751 was per-formed in a synthetic medium. the optimal inculum ratio of G. suboydans and S. uvarum for mixed-culture fermentation was 150:1. The optimum pH, incubation temperature and aeration rate for mixed-culture fer- mentation were 5.0, 3$0^{\circ}C$ and 2.25vvm, reapectively. As a result of batch pure-and mixed-culture fer-mentation, specific growth rate in pure-culture of both strain was lower than that in mixed-culture. The yield of cell mass from S. uvarum exclusively decreased. The growth rate of the mixed-culture was very similar to the pure-culture in the begining of culture, but it has been decreased after 16hrs. In the mean time, S. uvarum in mixed-culture fermentation could grow due to fructose converted, but it could not row in pure-culture fermentation. Thus, the relationship was a sort of commensalism. The kinetic parameters cal-culated through steady-state results during continuous fermentations are as follows :{TEX}$$\mu$_{max1}${/TEX}=0.118({TEX}$h^{-1}${/TEX}), {TEX}$Ks_{1}${/TEX}=0.330(g/L),:{TEX}$$\mu$_{max2}${/TEX}=0.162({TEX}$h^{-1}${/TEX}), {TEX}$Ks_{2}${/TEX}=0.038(g/L). The yield of bacterial cell mass relatively constant, but yield of yest cell mass was gradually decreased.

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Mode Analysis of Cascaded Four-Conductor Lines Using Extended Mixed-Mode S-Parameters

  • Zhang, Nan;Nah, Wansoo
    • Journal of electromagnetic engineering and science
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    • v.16 no.1
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    • pp.57-65
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    • 2016
  • In this paper, based on the mode analysis of four-conductor lines, the extended mixed-mode chain-parameters and S-parameters of four-conductor lines are estimated using current division factors. The extended mixed-mode chain-parameters of cascaded four-conductor lines are then obtained with mode conversion. And, the extended mixed-mode S-parameters of cascaded four-conductor lines can be predicted from the transformation of the extended chain-parameters. Compared to the extended mixed-mode S-parameters of four-conductor lines, the cross-mode S-parameters are induced in the extended mixed-mode S-parameters of cascaded four-conductor lines, due to the imbalanced current division factors of cascaded two sections. The generated cross-mode S-parameters make the equivalent different- and common-mode conductors not independent from each other again. In addition, a new mode conversion, which applies the imbalanced current division factors, between the extended mixed-mode S-parameters and standard S-parameters is also proposed in this paper. Finally, the validity of the proposed extended mixed-mode S-parameters and mode conversion is confirmed by a comparison of the simulated and estimated results of shielded cable.

Fatigue Crack Closure and Propagation Behavior Under Mixed-Mode Loading Observed by the Direct Measuring Method (직접측정법을 이용한 혼합모드 하중 하에서 피로균열의 닫힘과 전파거동)

  • Song Sam Hong;Seo Ki Jeong;Lee Jeong Moo
    • Journal of the Korean Society for Precision Engineering
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    • v.22 no.6 s.171
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    • pp.152-158
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    • 2005
  • The stress conditions acting on the practical structure are complex, and thus most cracks existing in the practical structures are under mixed-mode loading conditions. The effect of shear load component of mixed-mode loading acts more greatly in the stage of crack initiation and initial propagation than crack propagation stage. Hence, research on the behavior in the stage of crack initiation and initial propagation need to be examined in order to evaluate behavior of mixed-mode fatigue cracks. In this study, the crack tip displacement(CTD) was measured by using the direct measuring method(DMM). We examined the behavior at crack tip by determining crack opening load$(P_{op})$. From the test results, the propagation behavior of mixed-mode fatigue cracks was evaluated by considering mixed-mode crack closure. Also, we examined the characteristic of crack propagation under mixed-mode loading with crack propagation direction.

Historical Review on the Characteristics of Specialized and Mixed Land Uses of Korean Zoning System - From Chosun Planning Ordinace of 1934 to City Planning Law of 1962 (우리나라 용도지역제의 용도순화 및 용도혼합 특성에 관한 역사적 고찰 - 조선시가지계획령에서 도시계획법에 이르기까지 -)

  • Jun, Chae-Eun;Choi, Mack Joong
    • Journal of Korea Planning Association
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    • v.53 no.6
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    • pp.5-18
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    • 2018
  • While the zoning system has been developed based on the rationale of separated and specialized land uses to prevent negative externalities in the modern industrial era, the emergence of office-based new industries in the post-industrial era rather encourages mixed land uses to create agglomeration economies. This study aims to find historical basis to justify the reform of zoning system to promote both specialized and mixed land uses. When the zoning system was first introduced in Japanese colonial period by Chosun Planning Ordinance enacted in 1934, Special District within Manufacturing Area, and later within Residential, Commercial, and Mixed Areas respectively was institutionalized for specialized land uses, though it was not actually designated. When City Planning Law was enacted in 1962, Special District was substituted by Exclusive Areas (Exclusive Residential Area, Exclusive Manufacturing Area). Meanwhile Undesignated Area was designated for mixed land uses by Chosun Planning Ordinance, and later it was converted mostly into Mixed Area and partially into Green Area. Finally Mixed Area was substituted by Semi-Areas (Semi-Residential Area, Semi-Manufacturing Area) by City Planning Law in 1962. These demonstrate that Korean zoning system needs to revive the tradition that clearly promoted both specialized and mixed land uses.

Structuralization of Consumer's Emotional Responses in Online and Offline Environments: Focusing on Mixed Emotions (온·오프라인 환경에서 소비자 감정 반응의 추출 및 구조화: 혼합감정을 중심으로)

  • Lee, Eun-Kyoung;Jeon, Jung-Ok
    • Asia-Pacific Journal of Business
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    • v.13 no.2
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    • pp.197-207
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    • 2022
  • Purpose - This study reestablished the concept of mixed emotions experienced in online and offline shopping environments, and structuralized emotional responses which manifest mixed emotions in each channel, and developed a method of measuring overall mixed emotions in consideration of the asymmetry of emotions. Design/methodology/approach - This study conducted a focus in-depth interview based on phenomenological research and exploratory preliminary survey using questionnaires. In addition, a survey was conducted as a quantitative survey. Findings - Qualitative and quantitative researches were conducted to derive major emotional responses items which manifest mixed emotions in online and offline shopping environments and determine differential emotional structure in each channel. As a result, it was confirmed that mixed emotions consisted of 5 factors in each channel and 21 emotional responses. In addition, a method of measuring overall mixed emotions considering the asymmetric of emotions was developed to prove the difference in behavioral responses. Research implications or Originality - This study is meaningful in that it helps companies efficiently manage and understand customer responses to their products by classifying and systemizing the emotional responses experienced by consumers in online and offline purchase and consumption situations according to the purchase environment.

Studies on the Effect of 'Hagocho-San Against Liver Damage in Thioacetamide Induced Rats (하고초산(夏枯草散)이 Thioacetamide에 의(依)한 백서(白鼠) 간손상(肝損傷)에 미치는 영향(影響))

  • Lee, Young-Jong;Ahn, Duh-Kyun
    • Korean Journal of Pharmacognosy
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    • v.14 no.1
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    • pp.17-23
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    • 1983
  • To experimentally research out the effect of 'Hagocho-San' used for liver disease on the clinical treatment of oriental medicine, I induced liver damage rats by thioacetamide and dosed the extracts orally and measured the activity rate of GOT, GPT, ALP and LDH. The following results were obtained: 1) GOT activity was more decreased in the experimental group than in the control group. Extracts from mixed decoction was more efficacious than those mixed form of the extracts after individual decoction. Extracts from decoction showed continuous significance after 48 hours on, but mixed form of extracts after individual decoction was significant only after 48 hours and 96 hours. 2) GPT activity was more decreased in the experimental group than in the control group. Extracts from mixed decoction was effective after 48 hours on but mixed form of extracts after individual decoction was significant after 48 hours and 72 hours. 3) ALP activity was more decreased in the experimental group than in the control group. Extracts from mixed decoction was more efficacious than the mixed form of extracts after individual decoction and significance was verified after 72 hours on. 4) The significance of LDH activity in the extracts from mixed decoction was revealed after 72 hours and 96 hours but mixed form of extracts after individual decoction showed significance 72 hours later. 5) From the above results, it was showed that 'Hagocho-San' extract was effective on liver disease and extracts from mixed decoction was more effective than mixed form of extracts after individual decoction.

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A Technique for Mixed Pixel Extraction by Canonical Vector Analysis (정준벡터분석에 의한 혼합화소 해석기법에 관한 연구)

  • 박민호
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.16 no.1
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    • pp.75-84
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    • 1998
  • To achieve more accurate information from satellite image data, a research on a technique for mixed pixel ex-traction has been produced. The mixed pixels with only two land covers have been experimented. By analyzing canonical vector in canonical correlation classification, the mixed pixels have been classified. The ratio of the two canonical weighted values-the elements of canonical vector have been used as a threshold to discriminate mixed pixels. In case of the classification for the mixed pixels of bridge and water class in TM data before or after the 1st of September, the threshold for the optimal classification of the mixed pixels is 4.0. That is, if the ratio of the two canonical weighted values is less than 4.0, the pixel is a mixed pixel. Also, using the distribution of canonical weighted values, the constitution percentages of land covers within one mixed pixel can be approximately deducted. The accuracy of mixed pixel extraction for experimental area is 90% and quite acceptable. Conclusively, a technique for mixed pixel extraction by canonical vector analysis is effective.

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Effects of Mixed Characteristics of Oily Soil on Detergency of PET Fabric in Oily/Particulate Soil Mixed System (지용성/고형오구의 혼합오염계에서 지용성오구의 혼합특성에 따른 PET직물의 세척성)

  • Kang, In-Sook
    • Journal of the Korean Society of Clothing and Textiles
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    • v.35 no.10
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    • pp.1242-1251
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    • 2011
  • This study investigates the effect of mixed characteristics of oily soil such as mixed ratio, polarity of oily soil on contact angle of fabric, removal of oily and particulate soil from PET fabric in oily/particulate soil mixed system. The contact angle of fabric in the surfactant solution with suspended oily soil was examined as a fundamental environment of detergency of soil from fabrics. Detergency was investigated as function of mixed ratios of oily/ particulate soil, type of oily soil, surfactants concentration, surfactant type and temperature of detergency in surfactant solution. The contact angle of fabric in surfactant solution sharply increased with mixing nonpolar oily soil; in addition, the contact angle slightly increased with increasing contents of oily soil and decreased with increasing surfactant concentration. The removal of oily and particulate soil from fabric was higher in the solution mixed with polar versus nonpolar oily soil. The detergency increased with increasing surfactant concentration and the increased temperature of surfactants solution that were relatively improved in NPE compared to DBS solutions, The results indicated that the detergency of oily and particulate soil showed a similar trend in oily/ particulate mixed soil systems. The general contact angle of fabric was well related with the detergency of oily and particulate soil in oily/particulate mixed soil system, therefore, the primary factor determining the detergency of soil in oily/particulate mixed soil system may be the contact angle of fabric caused by wettability.

The Sorption Kinetic Studies and Development of Mixed Culture for Removal of Nonpoint Pollution Source (비점오염원 처리를 위한 혼합여재의 개발 및 흡착 Kinetic 연구)

  • Chung, Woojin;Lee, Sijin
    • Journal of the Korean GEO-environmental Society
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    • v.13 no.4
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    • pp.37-44
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    • 2012
  • This study investigated on the adsorption of nonpoint pollution source using the Sand, hydroxyapatite(HAP), Zeolite and mixed culture. The adsorption of nonpoint pollution source on Sand, hydroxyapatite(HAP), Zeolite and mixed culture was investigated during a series of batch adsorption experiments. After the batch absorption experiments analysed COD, T-N, T-P on adsorption water. The experimental data was analysed using the pseudo-first-order adsorption kinetic models. Langmuir and Freundlich isotherm models were tested for their applicability. The maximum adsorbed amount $(Q_{max})$ of COD were found to be sand 0.0511mg/g, HAP 0.1905mg/g, Zeolite 1.0366mg/g and Mixed media 0.7444mg/g. The maximum adsorbed amount $(Q_{max})$ of T-N were found to be sand 0.0159mg/g, HAP 0.0537mg/g, Zeolite 0.5496mg/g and Mixed media 0.1374mg/g. The maximum adsorbed amount $(Q_{max})$ of T-P were found to be sand 0.0202mg/g, HAP 0.1342mg/g, Zeolite 0.0462mg/g and Mixed media 0.1180mg/g. As a result, the mixed media was effective to remove nonpoint pollution source.

Effect on Rice Growth and Change of Inorganic Nitrogen Content in Soil by Application with Rice Bran and Mixed Expeller Cake Fertilizer on Machine Transplanting Rice Paddy Field

  • Kim, S.;Yang, C.H.;Lee, S.B.;Lee, J.H.;Kim, J.D.;Kim, S.J.;Im, I.B.
    • Korean Journal of Organic Agriculture
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    • v.19 no.spc
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    • pp.157-160
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    • 2011
  • This study was conducted to find a method using the application of rice bran and mixed expeller cake at machine transplanting rice paddy field. Different ratios of rice bran and mixed expeller cake were sprayed as substitute of chemical fertilizer (nitrogen 90kg $ha^{-1}$) before transplanting. Nitrogen content was highest in 30th day after transplantation, and in relation to treatments the order was the following: Rice bran 1,000kg $ha^{-1}$ + Mixed expeller cake 1,374kg $ha^{-1}$ > rice bran 2,000kg $ha^{-1}$ + Mixed expeller cake 948kg $ha^{-1}$ > rice bran 3,000kg $ha^{-1}$ + Mixed expeller cake 522kg $ha^{-1}$. Number of panicle and spikelets per $m^{-2}$ was higher in rice bran 1,000kg $ha^{-1}$ + Mixed expeller cake 1,374kg $ha^{-1}$ and rice bran 2,000kg $ha^{-1}$ + Mixed expeller cake 948kg $ha^{-1}$ than in rice bran 3,000kg $ha^{-1}$ + Mixed expeller cake 522kg $ha^{-1}$ and the yields was the highest in rice bran 1,000kg $ha^{-1}$ + Mixed expeller cake 1,374kg $ha^{-1}$.