• Development and Reproduction
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• v.4 no.1
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• pp.61-66
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• 2000

This study was investigated to analyze the inactivating point mutation and expression level of follicle-stimulating hormone(FSH) receptor mRNA. In first experiment, we analyzed the point mutation. Peripheral blood was collected from each patient. To screen individuals for the C566T mutation, PCR was performed for exon 7 of the FSH receptor gene in 10 patients. No inactivating point mutation of FSH receptor gene was identified in women with premature ovarian failure. To analyze the expression level of FSH receptor, mRNA expressions were examined by RT-PCR method using specific primers for the FSH receptor. The amount of FSH receptor mRNA expressed in POF patients was lower than that in the control group. But it was not significantly different. These finding suggests that lower expression of FSH receptor in premature ovarian failure patients might be the cause of the low response to the gonadotropin during the hyperstimulation in IVF-ET cycles.

• School Mathematics
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• v.5 no.4
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• pp.521-540
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• 2003

The processes of mathematics development and the results of it are always those of making a conquest of the circumscription by historical inevitability within the historical circumscription. It is in this article that I try to show this processes through the history of calculus. This article develops on the basis of the dialectical materialism. It views the change and development as the facts that take place not by individual subjective judgments but by social-historical material conditions as the first conditions. The dialectical materialism is appropriate for explaining calculus treated in full-scale during the 17th century, passing over ahistorical vacuum after Archimedes about B.C. 4th century. It is also appropriate for explaining such facts as frequent simultaneous discoveries observed in the process of the development of calculus. 1 try to show that mathematics is social-historical products, neither the development of the logically formal symbols nor the invention by subjectivity. By this, I hope to furnish philosophical bases on the discussion that mathematics teaching-learning must start from the real world.

• Journal of Mushroom
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• v.12 no.4
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• pp.350-356
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• 2014

This study was conducted to evaluate the feeding value of the spent mushroom (Hypsizygus marmoreus) substrates (SMS) in laying hens (Hy-Line Brown). The fresh spent mushroom (Hypsizygus marmoreus) substrates collected from the Namkyung farm were fermented with Bacillus subtilis EJ3 for 2 weeks. A total of twenty-four laying hens were fed corn-soy based experimental diets containing 0% (T0), 5% (T1), 10% (T2) and 15%(T3) fermented SMS for 12 weeks. There were no significant differences among the treatments in egg production, egg weight, egg mass, feed conversion and viability during the experimental period. Feed intake was significantly lowered in T0 (118.3 g) than T1 (121.9 g), T2 (120.3 g) and T3 (122.4 g). There were no significant differences among the treatments eggshell breaking strength, thickness and haugh unit, whereas the yolk color of T1, T2 and T3 were significantly heavy than T0. The palatability of boiled meat was significantly better in the T3 laying hens than in the T0 laying hens. In conclusion, fermented SMS can be used as resource of feed in laying hen feed at 5.0-15% level without effect on performance and egg qualify.

• Journal of The Geomorphological Association of Korea
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• v.18 no.3
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• pp.65-81
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• 2011

The landforms based on granite and basalt in Gosung, Gangwon province were analysed. Some part of this area experienced volcanic activities while most of the area was experiencing erosion of weathered mantle(saprolites) of mesoic granites during cenozoic period. Two different lithologies affect the mode of landscape evolution. The basalt covers the mountain tops as a 'cap rock' with flat surfaces. It shows relatively fresh rock surface with cliff or steep slops at the boundary with weathered granite. The blocks detached from the cliff accumulated at the foot of the cliff(talus) or moved and filled the valley(block streams). These debris slopes cover the deeply weathered granites. In the case of Oeum Mt. and Duibaekjae, the number of point of origin of the basalt flow is not clear. The orientation of blocks from block stream coincides with slope aspects and it can be assumed that the bolcks were moved by solifluction. The landscape change of the block streams are dominated by removal of weathered material from beneath of the valley rather than removal of bedrock blocks themselves.

• Proceedings of the Korean Journal of Food and Nutrition Conference
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• 2001.12a
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• pp.121-121
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• 2001

최소 배지에 여러 아미노산과 대사 산물을 첨가하여 배양시킨 Serratia marcescens ATCC 25419 세포추출물에서여 biodegradative threonine dehydratase (BDTD), biosynthetic threonine dehydratase (BSTD)와 acetolactate syntase (ALS)의 비활성도를 조사하였다. S. marcescens BDTD와 ALS는 낮은 농도 (0.5-2 mM)의 cAMP에 의해 촉진적 조절을 받으며, 비교적 낮은 농도의 isoleucine (1-4 mM)에 의해서는 S. marcescens BSTD의 생합성이 증가되고 높은 농도의 isoleucine (10-30 mM)에서는 감소되고 비교적 낮은 농도의 valine (2-4 mM)에 의해서 S. marcescens ALS의 생합성이 증가되는 것으로 보아 S. marcescens ATCC 25419에서 branched chain 아미노산 생합성 과정의 조절 양상은 Escherichia coli K-12와는 달리, isoleucine의 생합성 과정은 BSTD에 의해 조절되고, valine의 생합성 과정은 ALS에 의해 조절되는 것으로 사료된다.

• Proceedings of the Korean Information Science Society Conference
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• 2005.07a
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• pp.97-99
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• 2005

학교 정보화 기기의 보급과 함께 다양한 디지털 자료가 학급 경영 과정에서 나오고 있다. 이러한 학급 경영 과정에서 나오는 여러 자료들을 자신의 학급 경영의 산물로 학생들과 나누고자 하는 교사들이 많다. 하지만, 컴퓨터 능력 한계와 교사의 구미에 맞는 앨범 제작 소프트웨어가 부족한 관계로 많은 교사들이 이를 시도하지 못하는 상황이다. 교사들이 원하는 앨범 제작 소프트웨어의 조건으로는 첫째, 컴퓨터 능력이 별로 없어도 쉽게 앨범을 만들 수 있어야 하며 둘째, 학급 경영 과정에서 나오는 다양한 디지털 자료를 넣을 수 있어야 하고. 셋째, 간단하고 쉽게 배포할 수 있어야 한다는 점이다. 본 논문에서는 이러한 교사들의 욕구를 충족시킬 수 있는 디지털 앨범 제작 도구인 디지털 앨범 창조 2.1구현하려고 한다.

• Korean Journal of Environmental Agriculture
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• v.27 no.1
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• pp.86-91
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• 2008

Dicamba(3,6-dichloro-2-methoxybenzoic acid) is used to control for pre and post-emergence of annual and perennial broad-leaf weeds. It is very soluble in water and highly mobile, acidic herbicide. So it is easily moved and detected in groundwater. Zerovalent iron(ZVI) has been used for the reductive degradation of certain compounds through amination of nitro-substituted compounds and dechlorination of chloro-substituted compounds. In this study, we investigated the potential of ZVI for the oxidative degradation of dicamba in water. The degradation rate of dicamba by ZVI was more rapidly increased in pH 3.0 than pH 5.0 solution. The degradation percentage of dicamba was increased with increasing amount of ZVI from 0.05% to 1.0%(w/v) and reached above 90% within 3 hours of reaction. As a result of identification by GC-MS after derivatization with diazomethane, we obtained three degradation products of dicamba by ZVI. They were identified 4-hydroxy dicamba or 5-hydroxy dicamba, 4,5-dihydroxy dicamba and 3,6-dichloro-2-methoxyphenol. 4-Hydroxy dicamba or 5-hydroxy dicamba and 4,5-dihydroxy dicamba are hydroxylation products of dicamba. 3,6-dichloro-2-methoxyphenol is hydroxyl group substituted compound instead of carboxyl group in dicamba. We also confirmed the same degradation products of dicamba in the Fenton reaction which is one of oxidation processes using ferric sulfate and hydrogen peroxide. But we could not find out the dechlorinated degradation products of dicamba by ZVI.

• Proceedings of the Korea Society of Design Studies Conference
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• 1999.05a
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• pp.38-39
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• 1999

학문으로서의 역사가 길지 않은 디자인 분야에서 디자인 학자들은 많은 연구를 통해서 디자인이 학문적인 체계를 갖출 수 있도록 하기 위해 노력하였다. 이 과정의 산물이 디자인 연구 논문이며, 이러한 디자인 연구 논문에서 주로 다루어져온 연구 주제들의 변화를 살펴봄으로 하여 디자인을 구성하고 있는 학문적 요소를 파악하여 디자인의 학문적 구조를 살펴 볼 수 있다. (중략)

• The Microorganisms and Industry
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• v.14 no.1
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• pp.38-42
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• 1988

지난 10여년간 급속히 발전한 유전공학기술의 개발로 이제는 유전공학의 산물인 단백질에 인위적으로 변형을 일으키거나, 자연계에 존재하지 않는 새로운 단백질을 창제하고자하는 단백질공학 기술이 개발되고 있다. 또한 단백질공학기술의 성공적인 발전을 위해서는 유전자재조합기술에 의해서 대장균이나 효모로부터 생산되는 단백질을 대량으로 손쉽게 순수분리할 수 있는 기술이 개발되어야 한다. 그동안 한국과학기술원 부설 유전공학연구센터에서는 인체 인터루킨-2(rH 1L-2)의 클로닝과 대장균으로 하여금 이 인체 인터루킨-2를 합성, 과생산하게 하는데 성공하였으며, 이 대장균균주의 대량생산에 성공하여 이 균주로부터 rH 1L-2를 높은 수율로 정제하는 과정을 소개하고자 한다.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2003.07a
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• pp.317-326
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• 2003

원예산물은 출하과정에서 외관과 내부품질에 따라 분류되고, 그 결과에 따라 상품성과 가격이 결정된다. 수박의 경우에도 품질이나 가격은 크기, 무게, 외피모양, 타격할 때 나는 반사음, 촉감 등에 따라 결정되는데, 주로 경매사 또는 감별사의 경험이나 표본검사에 의존하고 있다. 최근 과실류에 비해 크고 껍질이 두꺼운 수박, 메론 등의 내부품질을 비파괴ㆍ실시간으로 판정하기 위한 연구가 국내외에서 활발히 수행중이다. 특히 X-선, 음파, 근적외선 등을 이용하여 숙도, 공동, 당도, 밀도 등을 신속히 검출하기 위한 연구가 대부분을 차지하고 있다. (중략)