• 한국석유지질학회:학술대회논문집
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• 2005.09a
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• pp.94-100
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• 2005

동해 울릉분지 북서부해역에서 채취한 코어퇴적물을 이용하여 울릉분지의 제4기 후기 층서와 퇴적환경을 연구하였다. 이를 위하여 테프라층서, 탄소연대측정, 퇴적상, 퇴적물의 암질, 퇴적물과 공극수의 원소성분 등을 분석하였다. 퇴적상을 기준으로 코어퇴적물은 Unit 1, Unit II 및 Unit III으로 나누어지며, Unit의 경계부근에서는 주로 화산력으로 구성된 2매의 향암질 또는 조면암질 테프라층과 주로 화산재로 구성된 1매의 유문암질 테프라층이 협재되어 나타난다. 이들 테프라층에는 울릉도에서 기원한 울릉-오키층(Unit I/II 경계, 약 8.1 cal. kyr BC)과 울릉-야마토층(약 30.7 cal. kyr BC), 일본에서 기원한 아이라-탄자와층(Unit I/II경계, 약 22.8 cal. kyr BC)이 있다. Unit II의 중간부근에서 발견되는 DLM(Dark Laminated Mud) 층에는 망간보다는 철이 상대적으로 풍부하고, 철은 주로 구상집적체의 황화철로 발견되는데, 이들 광물은 정체환경 동안 물의 순환이 약화된 시기에 무산소환경에서 형성되었다. 퇴적물 내 유기물은 해양성 기원으로, 열적 성숙단계가 대부분 미성숙단계에 놓여 있다. Termination I 전에 급격하게 총유기탄소 (TOC)의 함량이 증가함을 보여주는데, 이는 빙기에서 간빙기로 변하는 시기에 해수면 변동과 관련이 있는 것으로 보인다. 공극수와 공기층 가스의 분석에 의하면, 황산염($SO_4^{2-}$) 농도는 매몰심도와 함께 증가하고, 반대로 공기층 가스의 주성분인 메탄($CH_4$)의 농도는 감소한다. 이는 미생물학적인 활동과 관련된 황산염 환원작용이 코어 상부에서 일어났으며, 점차 메탄생성단계 (methanogenesis)로 전이가 일어났음을 의미한다.측해본 결과 침몰선체의 강도는 초기강도에 비해 약 2/5정도 감소하였음을 알 수 있었다.할 수 있었다. 이 연구 사례를 통하여 3차원 GPR 탐사 또한 국부적인 이상대의 규명뿐만 아니라 광역적인 고고학 조사에도 다른 물리탐사와 마찬가지로 쉽게 활용될 수 있다는 결론을 얻을 수 있었다. 3차원 GPR 탐사가 향후 국내의 문화재 조사에 표준화된 탐사과정 중의 하나로써 적극 활용되길 기대한다.larity가 높은 oil에서는 약 $70 {\~} 90\%$의 phenoxyethanol이 유상에 존재하였다. 또한, 미생물에 대한 항균력도 phenoxyethanol이 수상에 많이 존재할수록 증가하는 경향을 나타내었다. 따라서, 제형 내 oil tomposition을 변화시킴으로써 phenoxyethanol의 사용량을 줄일 수 있을 뿐만 아니라, 피부 투과를 감소시켜 보다 피부 자극이 적은 저자극 방부시스템 개발이 가능하리라 보여 진다. 첨가하여 제조한 curd yoghurt는 저장성과 관능적인 면에서 우수한 상품적 가치가 인정되는 새로운 기능성 신제품의 개발에 기여할 수 있을 것으로 사료되었다. 여자의 경우 0.8이상이 되어서 심혈관계 질환의 위험 범위에 속하는 수준이었다. 삼두근의 두겹 두께는 남녀 각각 $20.2\pm8.58cm,\;22.2\pm4.40mm$으로 남녀간에 유의한 차이는 없었다. 조사대상자의 식습관 상태는 전체 대상자의 $84.4\%$가 대부분이 하루 세끼 식사를 규칙적으로 하고 있었으며 식사속도는 허겁지겁 빨리 섭취하는 경우가 남자는 $31.0\%$, 여자는 $21.4\%$로 나타났고 이들을 제외한 나머지 사람들은 보통 속도 혹은 충분한 시간을 가지고 식사를 하였다. 평소 식사량은 조금 적게

• Journal of the Korean Society of Radiology
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• v.2 no.4
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• pp.5-9
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• 2008

Antiscatter grids are widely used in radiography to remove scattered X-rays and thus improve the image contrast. However, the use of grids makes moir$\acute{e}$ artifact in the digital image, and this can be a critical reason for a mistaken diagnosis. In this paper, we examined that moire artifacts are how to relate with grid frequency, pixel pitch and grid rotation angle. To experiment we prepared 6 grids having different line frequencies (4.0 to 8.5lines/mm) and tested with a DR imager having a $139{\mu}m{\times}139{\mu}m$ pixel size. In the result of this experiment, we could get data about moir$\acute{e}$ artifact that could be make solution to remove the line artifact for the successful use of the grid in digital radiography. The acquired data and theory through this experiment, are expected to make contribution to the elimination of moir$\acute{e}$ artifact in the DR system.

• Journal of Life Science
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• v.19 no.6
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• pp.793-798
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• 2009

This study was undertaken to reveal the relationship between genetic variations and inheritance patterns and the development of a systemic white coat color frequently observed in Jeju horses. It was determined that the white coat color occurred in all basic coat colored (black, bay and chestnut) horses by combining the phenotype and MC1R genotypes. There were no polymorphisms found in Jeju horses tested for mutational loci in the KIT gene, which were previously reported as potential mutations of the congenital dominant white coat color in other horse breeds in heterogeneity. The horses that had the 4.6-kb duplication in the STX17 intron 6 specifically showed the depigmented white coat color. Based on observation and STX17 genotypes, this depigmented whitening is defined as 'Chongma' (whitening, progressive graying with age-Gray) in Jeju horses. Pedigrees showed that this is an autosomal dominant inheritance pattern distinct from the bovine albinism caused by an autosomal recessive passion eye color. Because the gray phenotype is generally not completely expressed early in Jeju horses, it often makes them indistinguishable from other horses. Further studies are recommended for classification between the gray coat color and its similar phenotypes, such as the roan with its mixed hair colors appearing since neonatal period, acquired white hairs on wounded skin by veterinary treatment, and vitiligo-like skin pigmentation. However, study results revealing the relationship between the gray phenotype and genetic background suggested that useful information may be provided in regards to molecular breeding of Jeju horses.

• Food Science of Animal Resources
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• v.25 no.3
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• pp.322-327
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• 2005

This study was intended to provide basic information which might be useful in increasing added values to the pork from Korean native black pigs (KNP), through comparative evaluation on carcass characteristics and meat qualities between KNP and four exotic breed groups including Duroc (DD), Landrace (LL), Yorkshire (YY), and LYD-cross (1/4LL 1/4YY, 1/2DD), and the results were summarized as follows. Live weight carcass weight, dressed meat weight, skin weight, fat weight and bone weight of KNP were significantly (p<0.05) lower than those of DD, LL, YY and LYD-cross. Carcass yield and dressed meat yield were also significantly (p<0.05) lower in KNP than other 4 groups, however, total fat, skin, bone, kidney and kidney fat in percentage were significantly (p<0.05) higher for KNP than others. Dressed meat yield was highest for YY, followed by LYD-cross and KNP. Weight of belly was 6.12, 9.43, and 9.52 kg for KNP, YY and LYD-cross, respectively. Percent belly of KNP was $11.11\%$ while other groups ranged from 11.5 to $12.2\%$ Shear force value was not different among the treatments. KNP had significantly (p<0.05) lower water holding capacity (WHC), and cooking loss, but significantly (p<0.05) higher in juiciness comparatively. KNP had significantly (p<0.05) higher $a^{*}$ value while DD had significantly (p<0.05) lower than other breeds.

• Applied Biological Chemistry
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• v.13 no.1
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• pp.51-57
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• 1970

On the basis of the specific interrelationship between the species or variety of leguminous crops and the species or strain of nodule bacteria, Rhizobia, the rhizobial species and strain must be effectively chosen for the successful inoculation. The present paper describes on some results of the isolation and taxonomic study on the native rhizobial strains isolated from the nodules of five species of leguminous crops such as numerous varieties of soy bean, lespedeza, birdfoot trefoil, ladino and red clovers. The isolated strains of soy bean nodule bacterium, Rhizobium japonicum were grouped through the inoculation test on variety Changdanbaikmock into the effective, noneffective and toxic strain for the nodule formation. In the study of the effect of some inorganic and organic nitrogenous compounds on the growth of Rhizobium japonicum strain Ac 20, a promotive response was showed by asparagine, and glutamine, but hydroxylamine, nitrite, hydrazine and azide was inhibitory at the concentration of $10^{-2}M/l$ in mannitol-yeast extract basal medium. In the physiological characteristics each strain showed somewhat different activities of the indole-3-actic acid formation and hydrogenase and discussed with these characters in relation to nodule forming ability.

• Journal of the Korean Wood Science and Technology
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• v.28 no.3
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• pp.70-77
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• 2000

Among four compounds such as oxyresveratrol, resveratrol, morin and afzelechin isolated from the heartwood of Morns bombycis, oxyresveratrol and resveratrol which belong to stilbenoid indicated high antioxidative and antimicrobial activity, respectively. Based on this result, this experiment was carried out to elucidate the relationship between biological activities of stilbenoids and their chemical structures using two isolated and six synthesized ones prepared by Wittig reaction. Antimicrobial activity of 3,5-dihydroxystilbene(pinosylvin) devoid of hydroxyl group of B-ring was the best among the tested stilbenoids. Antimicrobial activities of the stilbenoids showed negative dependency on the number of hydroxyl groups of B-ring, that is, the fewer number of hydroxyl groups of B-ring, the higher antimicrobial activity. On the other hand, antioxidative activities of the stilbenoids indicated a positive relationship with the number of hydroxyl groups of B-ring. In tetrahydroxystilbenoids, antioxidative activities of the compounds possessing ortho-diphenol structure, 2',3,3',5- and 3,3',4',5-tetrahydroxystilbene, were superior to the others. As a result, it was concluded that resveratrol and oxyresveratrol isolated from the heartwood of M. bombycis had antimicrobial and high antioxidative activities, and these activities of stilbenoids were also dependent on the number and position of hydroxyl groups of B-ring.

• Proceedings of the Korea Water Resources Association Conference
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• 2007.05a
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• pp.1716-1720
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• 2007

연안 해역에서의 표사는 하천에서의 유사가 주요한 공급원이므로 산지-하천-해안을 통합한 유사 및 표사에 관한 관리가 필요하며, 해안수리 및 환경적인 측면에서 강성 연안구조물의 건설을 통하지 않고 연안에서의 침식을 억제해야하는 방지대책의 수립 요구가 증대하고 있는 실정이다. 즉 연안에서의 침식, 퇴적관계는 토사공급원의 장기적인 확보여부가 중요하며 하천에서 해안역으로 공급되는 유사량을 예측하고 또한 이들이 어떻게 효과적으로 연안 해역으로 이송되어 가는가를 파악하는 것은 연안표사문제를 이해하는데 매우 중요한 요소이다. 이를 위해서는 무엇보다도 하천에서 연안 해역으로의 유사량을 파악하는 것이 중요하며 그리고 하천 유사량이 하구에 사주를 형성하고 어떤 형태를 거쳐 연안표사로 이동하는가 하는 특성을 파악할 필요가 있다. 울산광역시 울주군 온산읍에 위치한 회야강의 하구폐색은 1990년대 중반부터 연구의 관심이 되어오고 있으며, 1986년 회야강 상류 회야댐 건설 이후 하구폐색이 가속화됨에 따라 매년 회야강 하구에서의 준설이 필요한 실정이다. 특히 회야강 하구부에서는 파랑류, 취송류와 하천류 뿐만 아니라 해류나 조류 등에 의한 흐름과 지형특성등 복합적으로 발생하는 하구현상에 의해 하구에서의 사주 발달이 상대적으로 강하여 하구폐색이 강하게 나타나고 있다. 이의 대책으로 최근 회야강 하구부에 도류제가 건설되었으며 이에 따른 장기적인 하구부 하상변동특성과 토사이동의 특성 파악이 요구되고 있는 실정이다. 본 연구에서는 이 같은 관점에서 회야강 하구부의 도류제 설치에 따른 하구에서의 지형변동과 유송토사량의 특성을 파악하기 위해 하천 상류부에서는 동적 평형상태의 유사량을 가정하고 하상재료 및 유사는 혼합입경으로 하여 하상고 및 하상교환층 중의 입도조성의 시간변화를 구하여 1차원적인 하상변동과 토사이동 특성을 해석하였다.했을 때, 대표입경을 통해 얻은 조도계수가 보정 조도계수보다 다소 작은 것으로 해석되었다.하고자 한다.해결책을 얻어내는 상호보완적인 결과를 추구한다. 그가 디자인하는 작품은 전형적인 이미지를 내포하지 않는다. 즉 그의 작품은 기존의 가치와 이념적인 것은 배제하고, 창의적인 개념을 도출하였다.형모서리는 건물 특화 성격이 강하므로 불가피할 경우 소형 액센트 광고 위치를 미리 벽면으로 할애하는 것이 경관 및 입면계획에 유리한 것으로 분석되었다. 불확실도 해석모형 등의 새로운 기능을 추가하여 제시하였다. 모든 입출력자료는 프로젝트 단위별로 운영되어 data의 관리가 손쉽도록 하였으며 결과를 DB에 저장하여 다른 모형에서도 적용할 수 있도록 하였다. 그리고 HyGIS-HMS 및 HyGIS-RAS 모형에서 강우-유출-하도 수리해석-범람해석 등이 일괄되게 하나의 시스템 내에서 구현될 수 있도록 하였다. 따라서 HyGIS와 통합된 수리, 수문모형은 국내 하천 및 유역에 적합한 시스템으로서 향후 HydroInformatics 구현을 염두에 둔 특화된 국내 수자원 분야 소프트웨어의 개발에 기본 토대를 제공할 것으로 판단된다.았다. 또한 저자들의 임상병리학적 연구결과가 다른 문헌에서 보고된 소아 신증후군의 연구결과와 큰 차이를 보이지 않음을 알 수 있었다. 자극에 차이가 있지 않나 추측되며 이에 관한 추후 연구가 요망된다. 총대장통과시간의 단축은 결장 분절 모두에서 줄어들어 나타났으나 좌측결장 통과시간의 감소 및 이로 인한 이 부위의 통과시간 비율의 저하가 가장 주요하였다. 이러한 결과는 차가운 생수 섭취가 주로 결장 근위부를 자극하는 효과를 발휘하는 것이 아닌가 해석된다. 이와 같은 연구결과를 통해 생다시마를 주원료로 개발된 생다시마차와 생다시마 음료가 만성 기능성 변비 증세를 개선하는 효능이 잠재적으로 있음을 확인하였다.

• Applied Biological Chemistry
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• v.14 no.1
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• pp.35-41
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• 1971

Changes in fatty substance of hot pepper fruit during the after-ripening period were studied for both neutral and polar fatty substance. The results obtained from these studies are tabulated as follows; 1. Total fatty substance decreased as the after-ripening proceeded, while neutral fatty substance was least during the climacteric period. Polar fatty substance showed sudden drop in the amount during the post-climacteric period. 2. Fatty acid composition in neutral fatty substance showed that there is decrease in linoleic acid during the post-climacteric period, and in myristic acid and oleic acid respectively during the climacteric period. Stearic acid contents also drops sharply as after-ripening proceeds. 3. Value for saturates to unsaturates in and the amount of neutral fatty substance became least during the climacteric period, indicating that there is relationship between metabolism of neutral fats and climacteric rise. 4. Fatty acid composition of polar fatty substance showed that there is decrease in linoleic acid when after-ripening takes place whereas linolenic acid increases. These became reverse in the amounts after the climacteric period, suggesting that these changes may be useful to indicate true maturity of the fruits.

• Journal of Korean society of Dental Hygiene
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• v.12 no.1
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• pp.123-133
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• 2012

Objectives : This study was performed to understand smoking condition and to investigate the relations among knowledge regarding smoking and oral hygiene, awareness of anti-smoking policy, and self-esteem, to provide fundamental basis, developing programs for smoking prevention and anti-smoking. Methods : From September 7, 2010 to September 16, 2010, questionaire survey was conducted for 566 female university students studying dental hygienics at a local district in Jeollanam-do. Collected data was analyzed by Chi-square test, t-test, one way ANOVA, Scheffe multiple range test, Perason's correlation test, and stepwise multiple regression test. Results : 1. Smoking condition of study subjects on general characteristics showed 17.1%, where 14.0% of previous smoking history, and 68.9% of currently nonsmoker. 2. Analysis on the knowledge related to smoking and oral hygiene, awareness of anti-smoking policy, and self esteem on the general characteristics of study subjects have shown better awareness of anti-smoking policy in non-alcoholics. Significant difference was found in knowledge about smoking and awareness of anti-smoking policy according to current resident status, but no difference found in self-esteem. Higher academic grade was related to higher awareness of anti-smoking policy and better ics. aalcell. Better health, but no diffeoral hygiene were related to better awareness of anti-smoking policy, and bewhich were statistically significant. Favorable interpersonal self-estehip was related to better awareness of anti-smoking policy. 3. Analysis on knowledge regarding smoking related health and oral hygiene, awareness of anti-smoking policy, and self-esteem showed higher level of anti-smoking knowledge in non-smoking group(60.44) compared to currently smoking group or group with previous history of smoking, and better awareness of anti-smoking policy in non-smoking group(53.54) than other groups, which was statistically significant. 4. Correlation analysis among smoking related knowledge, awareness of anti-smoking policy, and self-esteem has found relatively high correlation between smoking related knowledge and awareness of anti-smoking policy, which was statistically significant(r=0.481, p<0.001). 5. Among factors influencing awareness of anti-smoking policy, higher level of smoking related knowledge and satisfaction to specialty was related to higher awareness of anti-smoking policy which was lower in current smoker than past smoker, and higher academic grade was related to higher awareness of anti-smoking policy. Conclusions : Following results emphasize the need to establish a novel curriculum by which effective programs for smoking prevention and education of anti-smoking specialist could be provided as well as promoting coaching anti-smoking activity.

• Applied Chemistry for Engineering
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• v.24 no.1
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• pp.55-61
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• 2013

Heterogeneous metallocene catalysts supported on montmorillonite (MMT), [$Cp_2ZrCl_2$/MMT, $Cp_2ZrCl_2$/MAO/MMT, and $Cp_2ZrCl_2$ + MAO/MMT], were prepared with three different methods of immobilization and tested for ethylene polymerization. The heterogeneous catalysts immobilized on organo clay (30B-MMT) showed the higher metal loading and polymerization activity than those immobilized on natural clay $Na^+-MMT$. These results suggest that the hydroxyl groups of organo clay interlayers react with the MAO and catalyst through the chemical bond. The metallocene catalyst supported directly on MMT showed lower activity for ethylene polymerization compared to the homogeneous systems, while MMT/MAO/$Cp_2ZrCl_2$, catalysts treated with MAO before impregnation, showed a higher activity. The polymers obtained from MMT-supported catalysts have higher melting point, molecular weight and molecular weight distributions than those of homogeneous catalysts. The polymer particles with increasing significant size. Ethylene polymerization over 30B-MMT/MAO/$Cp_2ZrCl_2$ catalyst was also performed varying the process variables to optimize the process conditions.