Evolution of Social Complexity in Kaya, Korea

Kwon,Hak-Soo 한국상고사학회 1992 한국상고사학보 Vol.10 No.-

Hepatic Cirrhosis Occurring in a Young Woodchuck(Marmota monax) Due to Vertical Transmission of Woodchuck Hepatitis Virus(WHV)

Kyu-shik Jeong,정원일,Jae-yong Chung,Mi-young An,Chae-yong Jung,Gyoung-jae Lee,Jong-soo Kang,Byeong-cheol Kang,Young-heun Jee,Bruce H Williams,Young-oh Kwon,Da-hee Jeong 대한수의학회 2003 Journal of Veterinary Science Vol.4 No.2

Cirrhosis Occurring in a Young Woodchuck (Marmota monax) Due to Vertical Transmission of Woodchuck Hepatitis Virus (WHV)Da-hee Jeong, Won-il Jeong, Jae-yong Chung, Mi-young An, Chae-yong Jung, Gyoung-jae Lee1, Jong-soo Kang1, Byeong-cheol Kang2, Young-heun Jee3, Bruce H Williams4, Young-oh Kwon5 and Kyu-shik Jeong*College of Veterinary Medicine, Kyungpook National University, Daegu 702-701, Korea1Shinwon Scientific Co., LTD, Research Institute, Suwon, Korea2Clinical Research Institute, Seoul National University, Seoul 110-744, Korea3College of Veterinary Medicine, Jeju National University, Jeju 690-756, Korea

원자흡수 분광기를 이용한 크롬의 효율적인 정량에 관한 연구

권수한,최희선 慶尙大學校 기초과학연구소 1985 基礎科學硏究所報 Vol.1 No.-

In the atomic absorption spectrometry of chromium by using air-acetylene flame, the interference of various interfering cations on the chromium absorption and repression of this interference by the addition of cerium and yttrium have been investigated. The following conclusions are obtained from the experimental results. 1. The sensitivity for chromium absorbance is favorable when the flow rate ratio of oxygen to acetylene is about 1:1 and the optical axis is 6㎜ above the burner. 2. The interferences by interfering cations existed in the sample solution as the same amount as chromium are completely released by the addition of cerium twice and yttrium three-fold as much as interfering cations.

숯첨가 사료투여가 넙치의 면역반응에 미치는 영향

권문경,이윤호,박상언,김봉석,박수일 한국어병학회 2002 한국어병학회지 Vol.15 No.1

숯첨가 사료 투여가 넙치에 미치는 영향을 알기 위하여, 넙치에 숯 1%, 3%, 5% 첨가사료를 8주간 투여하면서 성장, 혈액성분, 비특이적면역능을 분석하였으며 어병세균인 Edwardsiella tarda 균의 공격 시험에 대한 방어능을 조사하였다. 숯 첨가 사료 투여는 넙치의 성장과 라이소자임 활성에서는 유의적인 차이를 나타내지 못했지만, 5% 숯첨가구에서 혈액 중의 total protein과 cholesterol의 농도가 대조구에 비하여 낮게 나타났다. 그리고, 숯 3% 첨가구에서 두신 식세포의 활성 및 병원성 세균인 E. tarda에 대한 방어능도 가장 높게 나타났다. The charcoal effects on the immune responses of flounder, Paralichthys olivaceus were studied. Fish were fed an experimental diet supplemented with 1%, 3% or 5% of charcoal to a commercial diet. Several factors such as weight gain, hematological parameters, nonspecific immune responses and resistance against Edwardsiella tarda were evaluated 4 and 8 weeks after the administraion. The changes of body weight and lysozyme activities were not signigicant among tested groups. But cholesterol and total protein concentration in the blood were significantly lower in the 5% supplemented group than in the control. The production of superoxide by macrophage from the head kidney, examined by NBT reduction, was significantly higher in the 3% charcoal supplemented groups than in the control. The survival rate after an artificial challenge with 1×10^exp(7) cells of E. tarda per fish was significantly the highest in the 3% charcoal supplemented group.

Cyclodextrin Glucanotransferase와 Cyclodextrinase를 생산하는 Bacillus 속 세균의 분리와 그 효소들의 특성

권현주,남수완,김광현,곽영규,김병우 동의대학교 기초과학연구소 1997 基礎科學硏究論文集 Vol.7 No.1

A bacterium producing Cyclodextrin Glucanotransferase (CGTase) and Cyclodextrinase (CDase) was isolated from soil, and named as Bacillus stearothermophilus KJ16 . The growth of the isolated strain occurred in two steps, and syntheses of CGTase and CDase were dependent on the growth cycle of the cell. CGTase was constitutively synthesized during the 1st growing phase. while CDase was synthesized inducibly during the 2nd growing phase. When the medium pH was controlled at 7.0, the maximun enzyme activities of CGTase and CDase were increased by 12-fold (1300 mU/ml) and 2-fold (225 mU/ml), respectively, compared with the pH-uncontrolled batch culture. The CGTase of the isolate converted soluble starch to CDs with the ratio of α-CD:β-CD:γ-CD=42:46:12 at 55℃. The optimal pH and temperature of CGTase were 6.0 and 60℃,respectively and the optimal pH and temperature of CDase were 6.0 and 55℃. The molecular weights of the purified CGTase and CDase were estimated to be 65,000 and 68,000 dalton, respectively, Among serveral substrates, γ-CD was most rapidly hydrolyzed by the purified CDase.

公益事業(utility industry)의 費用上昇要因과 代替彈力性 分析 : 韓國 電力産業을 中心으로

권기철,주수현 釜山外國語大學校國際通商硏究所 1997 國際經營論集 Vol.12 No.-

총체적 언어중재가 다운증후군 아동의 발화에 미치는 효과

권형지,박선희,강수균 대구대학교 특수교육재활과학연구소 2005 특수교육재활과학연구 Vol.44 No.3

본 연구는 총체적 언어중재가 다운증후군 아동의 발화 자율성의 증가, 의사소통 의도의 변화, 그리고 전반적 언어능력이 향상되었는지를 알아보고자 하였다. 이를 위하여 생활연령이 9.9~13.2세 범위이고, 약물 복용이나 다른 신체적 장애가 없는 다운증후군 아동 3명을 대상으로 언어중재를 실시하였다. 이를 위하여 사전 - 사후 설계를 적용하였고, 사전 평가 단계, 중재 단계, 사후 평가 단계의 과정으로 실시하였다. 본 연구의 결과 첫째, 총체적 언어중재가 다운증후군 아동의 발화에서 발화의 자율성이 증가되었다. 둘째, 총체적 언어중재가 다운증후군 아동의 발화에서 의사소통 의도가 변화되었다. 셋째, 총체적 언어중재가 다운증후군 아동의 전반적 언어능력을 증가시켰다. 이상과 같은 결과를 바탕으로 총체적 언어중재가 다운증후군 아동의 언어능력에 긍정적인 영향을 미쳤다는 것을 알 수 있다. The purpose of this study was to examine the effect of a whole language intervention in the utterance development in children with Down syndrome. Three boys with Down syndrome, who were in the range of 9.9 years to 13.2 years old, participated in the study. None of subjects showed visual, hearing, emotional, and/or behavioral problems besides Down syndrome. To investigate each subject's language ability, 3 examination tools were administered: The production of voluntary utterances, the variety of conversational intension, and the Preschool Receptive-Expressive Language Scale(PRES). This study used pre-post treatment design. The results of study were as follow: First, the whole language intervention improved the subjects' mean of production of voluntary utterances. Secondly, the whole language intervention improved the subjects' mean of variety of conversational intension. Thirdly, the whole language intervention improved mean of the overall language development for all the subjects. As described above, the whole language intervention improved semantic, syntactic, pragmatic ability of language for all the subjects.

Bainite 球狀黑鉛鑄鐵의 磨滅特性에 미치는 殘留Mg의 影響

權赫茂,朴相俊,金水泳 충남대학교 공업교육연구소 1982 論文集 Vol.5 No.2

Bainite spheroidal graphite cast iron specimens of 0∼0.054wt % residual Mg were casted into a green sand mold, 25 mm thickness Y-block. The microstuctures of the castings were studied for mechanical properties and abrasion characteristics. The results obtained from this study are summerized as follows: 1) Under the present expermental conditions, the relation between the abrasion speed and the abraded amount are; 0.5m/sec for 1^st abrasive wear and 2.38m/sec for 2^nd abrasive wear. 2) Increasing the residual Mg, the first abrasion speed for 2nd abrasive wear moved to the low abrasion speed. 3) The maximum amount of abraded material during 2^nd abrasive wear decreases with the increasing residual Mg content, and moves to the high abrasion speed as the residual Mg is increased over 0.042 wt %. 4) The amount of abraded materials increases with the decreasing residual Mg at abrasion speed 2.38 m/sec and with the increasing residual Mg at abrasion speed 0.62∼1.14 m/sec. 5) Increasing the abrasion speed, abrasion mechanisms are as follows; ⓐ 1^st abrasive wear ⓑ 1^st corrosive wear ⓒ 2^nd abrasive wear ⓓ 2^nd corrosive wear. But, Under the present expermental condition the adhesive wear mechanism didn't appear.

X-ray 영상을 이용한 농산물의 특징점 추출 및 분류 알고리즘

권수근,김철수 경주대학교 건설환경연구소 1999 建設環境論叢 Vol.- No.2

Image processing of real-time X-ray images of randomly-oriented and touching pistachio nuts for product inspection is considered. The image processing used to isolate individual nuts and an watershed transform algorithm are described. To improve the classification ratio compared with the previous research, some new features are introduced. Thus the classification ratio is much improved asa expected. The SAS classifier is used to classify good and bad nuts.

철의 원자흡수 분광법에서 세륨 및 이트륨의 해방효과

권수한,이심성,김재상 慶尙大學校 1985 論文集 Vol.24 No.2

In the atomic absorption spectrometry, the interferences of Ni, Co, and Cu on the iron absorption and the repression of this interference by the addition of cerium and yttrium have been studied. The interference by Ni, Co and Cu existed in the sample solution as the same amount as iron are completely released by the addition of cenium and yttrium twice as much as interfering cation. The intenference by the mixed interfering cations(Ni, Co, Cu) are larger than by each interfering cation and however the releasing of the interference by cerium and yttrium are effective up to some degree of the concentration of mixed interfering cations.