• Cross-Cultural Studies
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• v.52
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• pp.313-339
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• 2018

The purpose of this study is to explore the manner in which Edith Wharton's Ethan Frome conveys contemporary, (culturally) imperialistic ideology. Especially by focusing on the difference between the European germ (or invasion) theory and the 'Americanized' invasion theory, this paper elucidates how the American $20^{th}$ century fiction represents contemporary 'fear' of the immigration of non-whites, that generated anti-immigration public sentiment in early $20^{th}$ century America. Also, this study investigates how racial or gendered biases contribute to attributing all (societal or individual) evils or illnesses to minorities such as (non-Nordic or non-white) immigrants, including women. Wharton's Ethan Frome isn't short of reflecting cultural imperialism.

• KOREAN POULTRY JOURNAL
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• v.46 no.3
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• pp.150-153
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• 2014

• KOREAN POULTRY JOURNAL
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• v.46 no.5
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• pp.154-157
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• 2014

• The Microorganisms and Industry
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• v.16 no.3
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• pp.44-47
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• 1990

Avery, MacLeod, McCarty가 1944년에 세균에서 유전적 재조합이 이루어진다는 사실을 발견한 후 세균은 진화 학자들과 미생물 학자들로 부터 주목을 받기 시작했다. 왜냐하면 세균은 자연생태계에서 또다른 형태의 유전적 적응성을 지니고 그러한 돌영변이 중 일부는 모세포(parent cell)보다도 주변환경에 더 잘 적응되었기 때문이다. 이제까지 GEM들이 생태계에서 유전자들 전이시키는 빈도가 대부분 낮았고, 토양이나 다른 자연생태계애서 유전자의 전이가 지속적으로 일어난다는 실험적 증거는 없었지만 이들을 생태계에 방출한 결과 유전자 전이가 몇몇 실험에서 확인된 적이 있어 토양에서의 유전적 전이의 가능성을 강하게 암시하고 있다. 하지만 어떻게 전이되고 토양의 물리, 화학및 전이에 필요한 최소한의 donor와 recipient의 수와 정확한 감지 방법등이 아직까지 밝혀져 있지 않은 상태이다. 더우기 토양환경에서 미생물의 활성과 생태, 군집 동태에 영향을 줄 수 있는 기능을 나타내려면 얼마만큼의 재조합 세균이 단위면적당 필요한지도 밝혀지지 않은 상태이다. 따라서 이러한 여러가지 문제점을 밝히는 것은 학문적인면 뿐만 아니라 진화론적인 이론에도 도움이 되며 GEM들이 토양이나 다른 생태계에 유출되었을 때의 환경영향평가나 규제를 하는데에도 도움이 될 수 있다고 본다.

• KOREAN POULTRY JOURNAL
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• v.45 no.6
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• pp.142-145
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• 2013

장 통합성은 가금 성장과 육 생산의 유전적 잠재력 발현을 충분히 하기 위한 사료 영양소들의 최고 이용에 필요한 장 건강 유지로 정의 될 수 있다. 장 건강은 장 통합성과 사료 첨가제들의 선정에 미치는 단백질의 양과 질이나 산패지방의 사용과 같은 영양적 결정과 사료 원료들의 영양범위를 아는 것이 중요하다. 전통적으로 사료 중 항생물질 사용은 장 건강 유지를 위한 최선의 선택이었다. 그러나 가금생산에 전세계적 항생물질 과사용(過使用)으로 항생제 내성 세균이 출현하는 원인이 되었다. 사료 중 항생제 사용으로 발생하는 내성 미생물에 관한 우려는 장내 병원균에 대한 예방제제 및 성장 촉진제 양쪽으로 작용하는 대체 제품을 찾는 연구를 발생시켰다. 씨트렉스는 성장 촉진제로서 그리고 가금 위장관내 내 병원성 세균의 증식억제제를 대표한다.

• 한국생물공학회:학술대회논문집
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• 2000.11a
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• pp.277-280
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• 2000

Rhodospirillum rubrum KCTC 1372 produced hydrogen from glucose for first 48hrs culture under the anaerobic photosynthetic conditions, and after 48hrs culture the hydrogen production was decreased by the accumulation of producing organic acids in broth. Only 41% of glucose was consumed and 143mL/day/L hydrogen were produced after 96hrs culture. However the hydrogen production and glucose consumption were substantially increased when the pH of the culture broth were controlled to 6.8-7.2. After 96hrs culture, 450mL/day/L hydrogen were produced, and about 80% glucose was consumed. Specific hydrogen production rate was 48.33mL/hr/g cells under pH not controlled, but 45.42mL/hr/g cells under pH controlled.

• Journal of Food Hygiene and Safety
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• v.32 no.5
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• pp.348-354
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• 2017

Internationally different food safety regulation and standards could cause troubles in trade unless those are built on scientific knowledge. In this research, we monitored the microbial population and analyzed the results to determine the level of microbial contamination in foodstuffs using relatively new statistical analysis (microbiological sampling plan, International Commission on Microbiological Specification for Foods). The goal of this research falls on establishing entirely new standards for various food categories addressed in the Korean "Food Code". Targets for monitoring were indicator organisms (i.e. total aerobic count, coliform and Escherichia coli) and foodborne pathogens (i.e. Bacillus cereus, Staphylococcus aureus and Clostridium perfringens) in ready-to-eat (RTE) products. As the result of the monitoring, total aerobic count, coliform, E. coli, and B. cereus in RTE products were found at the mean values of 2.10 log CFU/g, -0.60 log CFU/g, -1.33 log CFU/g and -1.23 log CFU/g, respectively. S. aureus was detected with the level of -1.35 log CFU/g only in fresh-cut food, while C. perfringens was -1.37 log CFU/g only in ready-to-cook food. Other samples did not have any food borne pathogens. Total aerobic count, B. cereus, S. aureus and C. perfringens satisfied the Food Code (the MFDS). On the basis of the analysis, we proposed a draft of microbial criteria for RTE products.

• Korean Journal of Food Science and Technology
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• v.25 no.2
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• pp.89-93
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• 1993

In order to study the effect of the intestinal bacteria on the physiology of the human large intestinal tract, we isolated the intestinal bacteria of Koreans and tested the enzymatic patterns. Isolated Bifidobacterium sp. Int-57 showed the higher activity of ${\beta}-xylosidase$ than other intestinal microorganisms. The effect of the carbon sources, nitrogen sources, inorganic salts, initial pH and initial temperature on the production of ${\beta}-xylosidase$ of Bifidobacterium sp. Int-57 was investigated. The most suitable carbon source, nitrogen source and inorganic salt for the production of ${\beta}-xylosidase$ were 1.1% xylose, 0.4% yeast extract and 0.0003% $CoCl_2$ respectively at initial pH 7.0 and temperature $40^{\circ}C$.

• Microbiology and Biotechnology Letters
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• v.17 no.3
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• pp.224-230
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• 1989

For the production of catechol from benzene, bacteria capable of assimilating benzene as a sole carbon and energy source were isolated from soils. Among them, newly isolated strain, KY-114 hay-ing the best ability of producing catechol from benzene was selected and a mutant Pseudomonas sp. HW-103 was developed from Pseudomonas sp. KY-114 by using mutagenesis induced by N-methyl - N'- nitro - N -nitrobo guanidine. The catechol reduction from benzone by Pseudomonas sp. HW-103 was investigated under various conditions. The highest catechol concentration (0.61 g/$\ell$) was obtained in the growth medium (pH 6.5) containing 1% sodium citrate, 0.75% (NH$_4$)$_2$SO$_4$, 0.15% benzene and other minerals at 3$0^{\circ}C$ after incubating of 15hrs. In the catechol production through the reaction with resting rolls, 2.5 g/1 of catechol was produced from 4 g/$\ell$ of benzene after incubation of 10 hrs under the optium conditions, which correponds to 45% of theoretical catechol yield.

• Reproductive and Developmental Biology
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• v.31 no.3
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• pp.161-167
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• 2007

In this study, we constructed and tested retrovirus vectors designed to express the human thrombopoietin gene under the control of the tetracycline-inducible promoters. To increase the hTPO gene expression at him-on state, WPRE sequence was also introduced into retrovirus vector at downstream region of either the hTPO gene or the sequence encoding reverse tetracycline-controlled transactivator (rtTA). Primary culture cells (PFF, porcine fetal fibroblast; CEF, chicken embryonic fibroblast) infected with the recombinant retrovirus were cultured in the medium supplemented with or without doxycycline for 48hr, and induction efficiency was measured by comparing the hTPO gene expression level using RT-PCR, western blot and ELISA. Higher hPTO expression and tighter expression control were observed from the vector in which the WPRE sequence was placed at downstream of the hTPO (in CEF) or rtTA(in PFF) gene. This resulting tetracycline inducible vector system may be helpful in solving serious physiological disturbance problems which have been a major obstacle in successful production of transgenic animals.