• Title/Summary/Keyword: Producer

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Isolation and Detection of Genes Responsible for Pyoverdines Biosynthesis in Pseudomonas putida KNUK9

  • Hussein, Khalid A.;Joo, Jin Ho
    • Korean Journal of Soil Science and Fertilizer
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    • v.48 no.2
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    • pp.119-124
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    • 2015
  • Pyoverdines (PVDs) are organic compounds produced by the fluorescent Pseudomonads under iron starvation conditions. Among the isolated rhizosphere pseudomonads strains, P. putida KNUK9 showed the highest production of PVDs and its production reached to 62.81% siderophores units. DNA isolation, ligation, PCR amplification, and transformation using E. coli $DH5{\alpha}$ cells were carried out for preparing the strong pyoverdine producer strains. We detected seven genes playing the fundamental roles in the pyoverdine metabolism in Pseudomonads. According to data and analysis obtained from the study, we deduced that the strain P. putida KNUK9 contains the essential genes required for pyoverdine biosynthesis.

Chemical Residues in Edible Tissues of Animals and Control Measures (축산식품의 유해물질 잔류와 그 관리방안)

  • 박종명;박근식
    • Journal of Food Hygiene and Safety
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    • v.6 no.2
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    • pp.17-22
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    • 1991
  • Great attention form a public health aspect has centered on the safety of tissues residues of veterinary drugs and environmental contaminants, with intensification of animal husbandry, the use of veterinary drugs will become increasingly important. Heavy responsibility is placed on the veterinarian and livestock producer to observe the period for withdrawal of drug prior to slaughter to assure that illegal concentrations of drug residues in meat, milk and egg do not occur. Every nation has their own regulations in relation to the residues and the guidelines on the use of veterinary drugs to fulfil the regulations, and their own national residue programs to monitoring and eliminate illegal products. Good practice of veterinary drug by users and governmental surveillance programs are very important to ensure animal food safety.

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Development and Comparisons of Hybrid and Failure-Free Period Acceptance Sampling Plans for Gamma Lifetime Distributions (감마 수명분포에 대한 혼합관측과 무고장기간 합격판정 샘플링 계획의 개발 및 비교)

  • Jeong, Hyun-Seok;Park, Jung-Won;Yum, Bong-Jin
    • Journal of Korean Institute of Industrial Engineers
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    • v.22 no.1
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    • pp.51-63
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    • 1996
  • In this paper, we develop two replacement-type reliability acceptance sampling plans(RASPs) for the gamma lifetime distribution assuming that the shape parameter is known. The two plans are respectively based upon failure-free period and hybrid life tests. We then compare the plans in terms of expected test time to reach a decision, power, etc. Computational results indicate among others that the failure-free period RASP has a shorter expected completion time than the corresponding hybrid RASP when the true scale parameter is 'large'. Finally, sensitivity analyses reveal that the effects of the uncertainties involved in the assumed shape parameter on the producer and the consumer risks are in favorable directions for both parties for both types of plans.

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Information Society and the Subject of Family Resource Management (정보사회와 가족자원경영학의 학문적 지향)

  • 차성란
    • Journal of the Korean Home Economics Association
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    • v.40 no.5
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    • pp.211-224
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    • 2002
  • Because information society as a lather environment has different characteristics with the industrial one, we need to get the new guideline for the development of family resource management. So, this study was purposed to explore the importance of the information as a resource that is to be managed in the information society. To find the answer, challenge of the family resource management to be with, characteristics of the information and the information society, their effects on He family resource management, academic research patterns and activities of the public institutions were examined. As results, first, we need to focus on the family as a producer rather than a consumer. Second, we have to give the model of cuber life to the nomads in the information society. Third, we need to develope a new curriculm for students to play their parts in the ICT industry. Lastly, our efforts to make networks between researchers and persons in the In industry are needed.

Characterization of an Extracellular Cellulose-Hydrolyzing Enzyme Complex from a Thermotolerant Strain of Aspergillus sp.

  • Lusta, Konstantin A.;Chung, Il-Kyung;Sul, Ill-Whan;Park, Hee-Sung;Shin, Dong-Ill
    • Journal of Microbiology and Biotechnology
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    • v.9 no.6
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    • pp.873-876
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    • 1999
  • Aspergillus sp. CX-l strain grown on microcrystalline cellulose resulted in the accumulation of high levels of cellulase and xylanase activities that were higher by two to four folds than those from the conventional commercial producer, Trichoderma reesei QM9414. Aspergillus sp. CX-1 demonstrated greater thermo stability and better catalytic characteristics of total cellulase activity (FPase) as compared to T. reesei and Aspergillus niger F-2039.

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Effect and Development of Automatic Control of Dissolved Oxygen on Growth of Phellinus linteus WI-001 (Phellinus linteus WI-001 균사체의 성장에 미치는 용존산소농도의 영향 및 자동 조절방법 개발)

  • 김종래;권호균;전계택;이계관
    • Microbiology and Biotechnology Letters
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    • v.28 no.5
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    • pp.285-290
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    • 2000
  • The effects of dissolved oxy-gen(DO) concentration and DO control modes on cell growth in a 4L computer-controlled bioreactor system were investigated using Phellinus linteus WI-001, a producer of protein-polysaccharides having potent anticancer activi-ties. When DO was controlled at about 20%, maximum cell concentration and specific growth rate of the strain were observed to increase 36% and 64%, respectively, as compared to the experiment performed without DO control. By adopting cascade automatic control of DO ar 20% in a mixed automatic control mode using computer-con-trolled program, 19.5g/L of maximum cell concentration was obtained. These results showed that the mixed auto-matic control mode was the effective method for enhancing cell growth of the shear sensitive Phellinus linteus.

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Mitigating Hazards by Better Designing a Recycling Program: Lessons Learned from South Korea

  • Kim, Kyung Woo;Song, Minsun
    • Journal of Contemporary Eastern Asia
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    • v.14 no.2
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    • pp.17-36
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    • 2015
  • As an effort of mitigating hazards, pro-environmental programs have been vigorously activated with regard to solid waste recycling. It is beneficial for both the environment and resource saving, but implementation and enforcement are hard to achieve voluntarily. The South Korean Government first implemented the Deposit Refund System (DRS) and later the Extended Producer Responsibility Program (EPR) to reduce waste and encourage recycling in South Korea. Un-der the DRS, producers would pay for recycling the wastes of the products. The government then repealed the DRS and implemented the EPR program. Under this program, the producers recycle as much as the Ministry of Environment determines or pay a penalty for an excessive amount of the waste. In the broader perspective of disaster management, such policy programs can mitigate environmental hazards. This paper compares those two programs that facilitated the level of recycling, focusing on how such programs regulate producers and how they were operated from the perspective of implementation and enforcement.

A Study on the High-Frequency Resonant Inverter System for Indirect Induction Heating (간접유도가열용 고주파 공진형 인버터 시스템에 관한 연구)

  • Kwon H. M.;Shin D. C.;Kim K. H.;Kim Y. J.
    • Proceedings of the KIPE Conference
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    • 2002.07a
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    • pp.322-325
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    • 2002
  • In this paper are described the indirect induction heated boiler and induction heated hot air producer using the voltage-fed series resonant high-frequency inverter which can operate in the frequency range from 20kHz to 50kHz. A specially designed induction heater, which is composed of laminated stainless assembly with many tiny holes and interconnected spot welding points between stainless plates, is inserted Into the ceramic type vessel with external working coil. This working coil is connected to the inverter and turbulence fluid through this induction heater to moving fluid generates in the vessel. The operating performances of this unique appliance in next generation and its effectiveness are evaluated and discussed from a practical point of view.

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INNOVATIVE INDUCTION-HEATED HIGH-TEMPERATURE STEAMER USING VOLTAGE-FED HIGH-FREQUENCY RESONANT INVERTER

  • Guo, Bin;Nakamizo, Tetsuo;Nishida, Katsumi;Nakaoka, Mutsuo
    • Proceedings of the KIPE Conference
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    • 1998.10a
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    • pp.586-591
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    • 1998
  • This paper presents an innovative prototype of a new conceptual electromagnetic induction-based fluid heating appliance using voltage-fed series capacitor-compensated load resonant high-frequency IGBT inverter with a phase-shifted PWM and a power factor correction schemes. Its operating characteristics in steady-state and dynamic state are illustrated including unique features and evaluated on the basis of its computer simulation and experimental results of 10kw breadboard appliance developed for hot water producer and superheated steamer.

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Women and library & information science (여성과 문헌정보학)

  • 김갑선
    • Journal of the Korean Society for information Management
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    • v.14 no.2
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    • pp.191-212
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    • 1997
  • The purpose of this study is to examin the women' s issues in Library & Information Science and to develop a FLIS (Feminist Library & Information Science). This study sample consists of 83 articles published during 1970-1996 in 21 major LIS journals of Korea, America, and England. This study presents a women' s representation mode in LIS that allows categorization of women' s issues into three distinct but related categories: 1) women as information producer, 2) women as information user, and 3) women as information manager. This study suggests that FLI be based on Feminism and take gender as a analytic category of LIS research.

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