• Title/Summary/Keyword: Producer

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Production of Pure Pullulan from the Pigment-Deficient Isolate of Aureobasidium pullulans GM21 (색소 생성능이 결여된 Aureobasidium pullulans GM21 분리균주로부터 순수한 플루란의 생산)

  • 신용철;구부금;김기석;김태운
    • Microbiology and Biotechnology Letters
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    • v.21 no.5
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    • pp.494-503
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    • 1993
  • A fungal strain was isolated as a pullulan-producer from plant leaves and identified as Aureobasidium pullulan GM21. With A. pullulans GM21, culture conditions were optimized for the pullulan production and the changes of the molecular weight of pullulan produced were investigated according to the culture conditions we obtained maximum conversion yield of pullulan about 58-60%(40.8-42.0g/l) from 7% sucrose at 25C, initial pH 7.5 by the batch cultivations either in Erlenmeyer flask or in jar fermentor.

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Biosurfactant 생산 효모 Rhodotorula sp. G-1의 분리 및 Biosurfactant 생산

  • 강상모;이철수;김영찬
    • Microbiology and Biotechnology Letters
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    • v.24 no.2
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    • pp.185-190
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    • 1996
  • Some microorganisms including yeasts produce surface tension-decreasing biosurfactants. The strain G-1, the best producer of biosurfatants was isolated from the soil and identified as Rhodotorula sp., which was not discribed any report. The Rhodotorula sp. G-1 produced biosurfactant from vegetable oils, but failed to produce it from n-alkane or carbohydrate. Yeast extract was found to be more effective for the biosurfactant production as nitrogen source than any other inorganic nitrogen source. The composion of the optimal medium contained the following conponents: soybean oil 4%, glucose 2%, yeast extract 0.5%, KH$^{2}$PO$^{4}$ 0.1%, K$^{2}$HP0$^{4}$ 0.l%, MgSO$^{4}$ 5%, CaCl$^{2}$ 0.01%, NaCl 0.01%, pH 6.0. The surface tension activity was increased to 14% when, at first, the culture broth was fermented with only soybean oil as carbon sourse, and after 90 hours, feeded glucose, than that Of glucose and soybean oil added to it simultaneously. The maxium yield of the biosurfactant was about 15 g/l by after 90 hours, the feeding method of glucose.

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Economic Design of the Specification for Geometrical Quality Characteristic

  • Ma, Yizhong;Zhao, Fengyu;Xu, Jichao
    • International Journal of Quality Innovation
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    • v.2 no.1
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    • pp.50-57
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    • 2001
  • The economic design of specification limits must be determined on an economic basis where we minimize total loss to society, which consists of both the producer and the consumer. Economic specification limits have been developed based on the assumption that the quality characteristic is normally distributed. Unfortunately, the assumption is not to meet some practical cases. In this paper, some non-normal distributions are considered for quality characteristic with geometrical features. An economic model for selecting the optimum specification limits on the basis of minimizing total cost is introduced. A case study is presented to illustrate the application in practice.

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Analysis of Customer Loyalty and Purchasing Behaviors towards Environment-friendly Agricultural Products (친환경농식품의 고객충성도 및 구매특성에 관한 연구)

  • Jo, Je-Uk;Yoo, Duck-Ki
    • Korean Journal of Organic Agriculture
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    • v.17 no.3
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    • pp.273-289
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    • 2009
  • Under the changed market condition, The objectives of this study are to develop and test a research model specifying the relationship between customer loyalty and sale of environment-friendly food in korea. The target population of this research is consumers in seoul and some major cities. they are judged to have bigger environment-friendly food buying power and represent the future environment-friendly food consumption trend in korea. Results acquired from statistical analysis can be summarized like the following. The label-related components were important factors effecting the satisfaction and the loyalty. Also this study indicate that the customer loyalty is positively related to producer, ingredient indication, advertisement, and negatively related to price.

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A Case Study on the Regional Agricultural Cluster at Asan Area (지역농업 클러스터의 추진사례에 관한 연구 - 아산시 자원순환형 친환경지역농업 클러스터를 중심으로 -)

  • Kim, Ho
    • Korean Journal of Organic Agriculture
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    • v.17 no.4
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    • pp.463-481
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    • 2009
  • Regional Agricultural Cluster(RAC) at Asan area has been formed with Purundeul farming union corporation(Purundeul) as the center from the year 2005. Originally, RAC has been proceeded by Ministry for Food, Agriculture, Forestry and Fisheries (MFAFF) all over the nation from 2005. This RAC has helped Asan area to establish the foundation of environmentally friendly agriculture(EFA) searching for nutritional cycle. This also made jumping age turn developing age in EFA at Asan area. The number of Purundeul producer members was 386 farmers in 2008. Purundeul introduced organic livestock farming(Korean beef cattle; Hanwoo) for proceeding EFA searching for nutritional cycle in 2007, and had 719 cattle at the end of March 2009. Feedstuff materials for organic livestock is mostly produced from seeding farming by-products within Asan or the country. Asan RAC had built factories for feedstuff producing and beef processing with producers' investment.

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Bacteriocin(Staphylococcin) typing of swine strains of Staphylococcus hyicus subsp. hyicus (돼지 유래(由來) Staphylococcus hyicus subsp. hyicus의 Bacteriocin(Staphylococcin)형별(型別))

  • Park, Cheong-kyu
    • Korean Journal of Veterinary Research
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    • v.32 no.4
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    • pp.579-583
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    • 1992
  • A total of 113 Staphylococcus hyicus subsp. hyicus which had been isolated from healthy and diseased pigs were examined for their ability to produce staphylococcins. For selection of staphylococcin indicator strains, 80 strains were randomly selected from 113 strains, and were tested as indicator and as donator. The 8 indicators were chosen and used to type all of the strains. The ability to produce staphylococcin could be demonstrated in 43 strains (38.1%) of 113 Staph hyicus subsp. hyicus. The frequency of activity was higher in diseased pig strains (44.4%) than in healthy pig strains(36.8%). 43 staphylococcin producer strains were differentiated into 10 reaction types. The inhibitory effects of the staphylococcin (N27 and R 3) on other staphylococci differed by the staphylococcal species tested. All the gram-negative species were completely resistant to the three producing strains.

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A Study on the Estimating Functions of Price and Domestic Consumption of Chestnut in South Korea (우리나라의 밤 가격(價格) 및 국내소비량(國內消費量) 추정(推定)에 관(關)한 연구(硏究))

  • Jeon, Jun-Heon;Lee, Sang-Sik
    • Journal of the Korean Wood Science and Technology
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    • v.21 no.4
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    • pp.29-34
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    • 1993
  • This study was carried out to estimate price and domestic consumption functions of chestnut using time series data for the period 1970~1989. Using a regression analysis method, price and domestic consumption functions of chestnut in Korea are estimated. The result of this study reveals that the optimum function of price for chestnut is PR= -249.33965 + 163532.56817 EX/POP-4.10177 PD+4.02877 DC+6056.98339 GDP/POP($R^2$=0.88207), and that optimum function of domestic consumption for chestnut is ln DC=14.97145+1.48279 ln PD/POP - 0.32853 ln GDP - 0.02337 ln PR - 0.12117 ln EX($R^2$=0.98689). On the ground that instability of prices make the income of producer and family finances of consumer unstable, the object of price-policy should be to stabilize price of chestnut in Korea.

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Extraction of Spatial Characteristics of Cadastral Land Category from RapidEye Satellite Images

  • La, Phu Hien;Huh, Yong;Eo, Yang Dam;Lee, Soo Bong
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.32 no.6
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    • pp.581-590
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    • 2014
  • With rapid land development, land category should be updated on a regular basis. However, manual field surveys have certain limitations. In this study, attempts were made to extract a feature vector considering spectral signature by parcel, PIMP (Percent Imperviousness), texture, and VIs (Vegetation Indices) based on RapidEye satellite image and cadastral map. A total of nine land categories in which feature vectors were significantly extracted from the images were selected and classified using SVM (Support Vector Machine). According to accuracy assessment, by comparing the cadastral map and classification result, the overall accuracy was 0.74. In the paddy-field category, in particular, PO acc. (producer's accuracy) and US acc. (user's accuracy) were highest at 0.85 and 0.86, respectively.

The Methods and Uses of Life Cycle Costing (수명원가의 활용과 계산방법의 결정)

  • Cho, Kun-Ho
    • Journal of the military operations research society of Korea
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    • v.6 no.1
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    • pp.65-78
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    • 1980
  • The goal of this study is to make the government/users decide rationally with regards to the problems of the weapon systems management. Therefore it is necessary to develop how much precisely and through what methods the system should be cost. That costing policies should be determined under the considerations of the estimating expense and the expected benefit due to the applications of cost informations. After that, it must also be decided where the cost informations are used. We can suggest the cost results be used to find the most reasonable system among alternatives, the best producer, the most benevolent policy for user, and so on.

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Antibiotic Resistance of Hemolytic Escherichia coli Isolated from Animals in Korea (동물에서 분리된 용혈성 대장균의 항생제 내성)

  • Lee, Gye-Nam;Park, Yong-Ho;Jeong, Byeong-Yeol;Lee, Yeon-Hui
    • Korean Journal of Microbiology
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    • v.39 no.4
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    • pp.293-295
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    • 2003
  • Total 70 isolates of Escherichia coli obtained from pigs were studied. Forty four isolates had $\textregistered$-hemolytic activity which was heat labile. Minimum inhibitory concentration test indicated that 40 isolates (57.1%), 15 isolates (21.4%), 23 isolates (32.9%), and 5 isolates (7.1%) were resistant to ampicillin, cephalothin, gentamicin, and norfloxacin, respectively. None of them were extended spectrum $\textregistered$-lactamases (ESBLs) producer when the double disk synergy test (DDST) was performed.