생명과학 수업이 유아의 자연친화지능과 과학적 탐구능력에 미치는 영향

이희수,오영희 培材大學校 人文科學硏究所 2011 人文論叢 Vol.28 No.-

The purpose of the study was to provide the basic materials of scientific educational program suitable to young children by showing the effects of life science teaching on young children's naturalist intelligence and scientific inquiring ability. Research issue 1. What are the effects of life science teaching on young children's naturalist intelligence? Research issue 2. What are the effects of life science teaching on young children's scientific inquiring ability? 2-1. What are the effects of life science teaching on the children's ability to predict of the children's scientific investigation? 2-2. What are the effects of life science teaching on the children's ability to observe of the children's scientific investigation? 2-3. What are the effects of life science teaching on the children's ability to classify of the children's scientific investigation? 2-4. What are the effects of life science teaching on the children's ability to measure of the children's scientific investigation? 2-5. What are the effects of life science teaching on the children's ability to discuss of the children's scientific investigation? The target groups of the study are a class of twelve children of 4 years old who are total 24 students of two different day care centers in Daejeon City. The children of the experimental group, A, in one daycare center have been instructed with the life science teaching for the science activity for 16 weeks, while the control group, B, in a different day care center, have been instructed the standard of child care process for the science activity. The measurement of young children's naturalist intelligence and scientific inquiring ability had been used 'the multiple intelligence test (PMIT-E) for preschoolers' and 'the testing instrument of scientific inquiring ability'. To know the difference of their naturalist intelligence between the experimental group and the control group, the research material collected through such a testing instrument had been verified the corresponding sample, t and to know the difference of their scientific inquiring ability, the significance had been verified through the application of ANCOVA. The crucial result on the study is as follows. Firstly, the children who were instructed with the life science teaching statistically significantly improved the young children's naturalist intelligence more than the children who were not instructed with the life science teaching. Therefore, life science teaching has a positive effect on improving young children's naturalist intelligence. Secondly, the result after the study is that the life science teaching has a considerable effect on scientific inquiring ability. The experimental child group experienced a significantly noticeable point increase statistically compared to that of the opposing group. Therefore, life science teaching has a positive effect on improving young children's scientific inquiring ability. Therefore, life science teaching has an effective class on young children's naturalist intelligence and scientific inquiring ability.

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

한국인 심부전증 환자 심근에서의 인형 거대 세포 바이러스 감염

이명용,이무용,김영권,한성식,최성준,김효수,이영우,서정돈 단국대학교 1998 論文集 Vol.33 No.-

Objectives: In order to evaluated the prevalence and the site of infection of cytomegalovirus in terminally failing heart, cytomegaloviral DNA was detected in the explanted hearts of transplantation recipients. Methods: DNA extractions were performed from explanted failing hearts(N=22) and normal hearts(N=5) and polymerase cain reactions(PCRs) were done for detection of late gene sequence coding pp150 glycoprotein. The products were confirmed by electrophoresis on the 1% agarose gel. n order to improve the detectability of cytomegaloviral genome, nested PCRs were executed with the primers designed for the original 607 bp products. In situ PCRs also were done with the samples which were confirmed as positive for CMV viral genome by nested PCRs. Results: All patients had IgG anti-cytomegalovirus antibody and did not have IgM anti-cytomegalovirus antibody. Cytomegaloviral genomes in myocardium were detected by polymerase chain reaction. The 607bp products by PCRs were found in both explanted failing heart(3 cases/22. 13.5%) and normal hearts( 1 case/5, 20.0%). In nested PCRs, 186bp products were found in both failing hearts(LV 4/22, LA 3/2, RV 4/22, RA 0/17) and normal hearts(LV 2/5, LA 1/4, RV 2/5, RA 2/5). These was no significant change in positivity of cytomegaloviral DNA genome between failing and normal hearts. Total positivity of cytomegaloviral genome in explanted hearts was 44.4% according to the nested PCR results. The positivity of cytomegaloviral DNA by n situ PCR was 33.3%(4/12), and the site of positive reaction was the nuclei of the myocardial cells. Conclusion: Cytomegalovirus was rarely observed in explanted hearts of terminal heart failure and nested PCR could enhance the sensitivity of cytomegaloviral genome detection. The result of the in situ PCR showed the site of the cytomegaloviral infection was nuclei of the myocardial cells. Cytomegalovirus, however, might have no direct causal relationship in the development of terminal heart failure.

토양중 게르마늄 농도에 따른 벼의 생육 특성 및 게르마늄 흡수

이성태,이영한,최용조,이상대,이춘희,허종수 한국환경농학회 2005 한국환경농학회지 Vol.24 No.1

게르마늄의 약리효능이 알려짐에 따라 게르마늄이 깅화된 기능성 농산물의 요구도가 높아지는 추세이다. 본 연구는 게르마늄의 농업적 이용에 대한 기초 사료를 제공하고자 실시하였으며, 벼의 생육 및 게르마늄 흡수에 미치는 게르마늄처리 효과는 다음과 같다. 게르마늄을 0, 2.5, 5.0, 7.5 및 10.0 mg/kg으로 처리할 토양을 와그너포트에 넣어 벼를 재배힌 결과, 게르마늄 처리농도가 증가할수록 게르마늄 독성의 증가로 초장, 수장, 수수 및 수량이 급격히 감소하였으며 게르마늄 2.5 mg/kg 이상에서는 게르마늄 독성이 발생하였다. 게르마늄 처리농도가 증가할수록 벼의 게르마늄 흡수랑은 증가하였으나 벼의 게르마늄 이용율은 게르마늄 2.5, 5.0, 7.5 mg/kg 처리에서 각각 20.7, 12.5 및 7.5%로서 게르마늄 처리농도가 증가할수록 감소하였다. 벼의 부위별 게르마늄 함량은 볏짚>왕겨>현미 순으로 높았다. 게르마늄 2.5 mg/kg 처리시 볏짚, 왕겨 및 현미의 게르마늄 함량은 각각 103.4, 30.2 및 3.02 mg/kg 이었고, 볏짚과 왕겨에서는 게르마늄 무처리에서도 각각 2.9 및 3.9 mg/kg을 함유하고 있었다. 쌀의 아미노산 함량을 분석한 결과 게르마늄 처리농도가 증가할수록 Asx., Thr., Ser. 등 대부분 종류의 아미노산 함량이 증가하였으며, 그 결과 현미중 질소흡수량도 증가하였다. In order to obtain the basic information for agricultural utilization of Germanium(Ge), the growth characteristics and Ge absorption of rice plant were investigated with different Ge concentration in soil. Ge concentrations were treated with 0, 2.5, 5.0 7.5 and 10.0 mg/kg in pot(1/5,000a), respectively. As higher the Ge concentration in soil, the Ge absorption amount in straw, husk and brown rice were increased. But the yields were decreased with the increase of Ge phytotoxicity. When rice plant was grown more than 2.5 mg/kg Ge(as GeO₂) in the soil, growth was inhibited by germanium phytotoxicity and necrosis spots were observed in the rice leaf blades. Therefore the optimum concentration of Ge was less than 2.5 mg/kg in rice plant. When rice plant was cultivated on soil supplemented with 2.5 mg/kg Ge, Ge content in straw, husk and brown rice was 103.4, 30.2 and 3.02 mg/kg, respectively. The Ge content in plant was high in the order of straw > husk > brown rice. Most of the amino acids in rice were increased with the increase of Ge treatment, besides, total amino acid contents also increased.

간암 환자에 합병된 Citrobacter braakii 패혈증 1례 보고

이해미,배성하,이수남,이정우,신아영,류시영,이수연,윤문희,한선영,한남익,이영석,유진홍 대한감염학회 2010 감염과 화학요법 Vol.42 No.3

Citrobacter species is a gram-negative bacilli that can cause opportunistic infections in immunocompromised hosts. Citrobacter braakii refers to the genomospecies 6 of the Citrobacter freundii complex. There are no detailed studies on infections caused by this newly identified specific genetic species in Korea. We herein report a case of a patient with hepatocellular carcinoma who, after undergoing transcatheter arterial chemoembolization, developed biloma which later progressed to C.braakii sepsis and did not respond to treatment. To our knowledge, this is the first reported case in Korea on C. braakii infection resulting in septic shock in a patient with malignancy in Korea.

기업 HRD 담당자의 교육경험 및 교수설계 전문역량 조사연구

이성,이수영,이영민 한국농업교육학회 2008 농업교육과 인적자원개발 Vol.40 No.1

본 연구의 목적은 기업 내에서 인적자원개발 업무를 담당하고 있는 사람들이 갖추어야 할 전문역량들 중 교육과정 개발의 핵심역량인 교수설계 전문역량에 관한 실태를 조사·분석하는 것이다. 기업 HRD 담당자들의 교수설계 전문역량은 교육과정을 개발하기 위한 분석,설계,개발,운영,평가능력을 포함한다. 178명의 기업 HRD 담당자들에 대한 설문조사 결과,교수설계와 관련된 교육을 받은 경험이 적을 뿐만 아니라 교수설계 각 영역별 전문성도 낮다고 인식하는 것으로 나타났다. 기업 내 HRD 담당경력의 평균인 6.4년을 기준으로 경력이 많은 집단과 적은 집단 간 전문성의 현황과 필요성 간에 많은 차이가 있는 것으로 분석되었다. 기업 HRD 담당자의 교수설계 전문역량을 강화하기 위해서는 특히 운영능력 이외의 역량들을 높이기 위한 다양한 방안들이 강구되어야 할 것으로 나타났다. The purpose of the study was to examine the current status of human resource developers' instructional design competency, which consisted of analysis, design, development, implement, & evaluation (ADDIE) capabilities in corporate settings. The recent participation experiences at educational programs were investigated to identify their developmental efforts. The researchers also identified the level of the competency gap between the desired competency level required by the company and the current competency level of HRD practitioners. The researchers surveyed 178 human resource developers in corporate and investigated their previous training experiences in terms of analysis, design, development, implement, & evaluation areas. They responded they had lack of previous education in ADDIE areas and they perceived they had not been qualified to take care of ADDIE to make educational programs fruitful. They recognized that expertise of themselves and other HRD practitioners are not enough to conduct the whole process of ADDIE. Their expertise and competencies of ADDIE was separated by their average working years. They highly wanted to have opportunities to participate in the systematically well developed education program for HRD practitioners to help them be the high skilled HRD experts.

Microstructure‑Strengthening Interrelationship of an Ultrasonically Treated Hypereutectic Al–Si (A390) Alloy

Soo‑Bae Kim,Young‑Hee Cho,Jae‑Gil Jung,Woon‑Ha Yoon,Young‑Kook Lee,Jung‑Moo Lee 대한금속·재료학회 2018 METALS AND MATERIALS International Vol.24 No.6

Ultrasonic melt treatment (UST) was applied to an A390 hypereutectic Al–Si alloy in a temperature range of 750–800 °Cand its influence on the solidification structure and the consequent increase in strength was investigated. UST at such a hightemperature, which is about 100 °C above the liquidus temperature, had little effect on the grain refinement but enhanced thehomogeneity of the microstructure with the uniform distribution of constituent phases (e.g. primary Si, α-Al and intermetallics)significantly refined. With the microstructural homogeneity, quantitative analysis confirmed that UST was found tosuppress the formation of Cu-bearing phases, i.e., Q-Al5Cu2Mg8Si6, Al2Cuphases that form in the final stage of solidificationwhile notably increasing the average Cu contents in the matrix from 1.29 to 2.06 wt%. A tensile test exhibits an increasein the yield strength of the as-cast alloy from 185 to 208 MPa, which is mainly associated with the solute increment withinthe matrix. The important role of UST in the microstructure evolution during solidification is discussed and the mechanismcovering the microstructure-strengthening interrelationship of the ultrasonically treated A390 alloy is proposed.

전자부품 제조업 근로자들의 시력변화에 대한 연구

이용만,안규동,이성수,함정오,김화성,리갑수,이병국 순천향의학연구소 1996 Journal of Soonchunhyang Medical Science Vol.2 No.2

근접작업이 시력약화의 원인이 될 수 있는가를 알아보기 위하여 전자부품을 제조하는 2개 사업장에서 1991년에서 1993년까지 입사한 근로자들 중에서 근접작업으로 인정되는 마이크로칩을 조립하는 근접작업자 306명을 조사군으로, 대조군은 세탁기 타이머 및 일반 기계기구를 조립하는 작업자 154명, 계 460명을 선정하였다. 이들 대상자는 1991년 입사자는 1993, 1994, 1995년 시력을 조사하였으며, 1992년 입사자는 1993, 1994, 1995년 3년동안 조사를 하였으며, 1993년 입사자는 1994, 1995년 2년간 시력을 조사하였다. 대상자 중에서 입사시 안경을 착용한 근로자는 82명(17.8%)이었다. 따라서 남자 근로자와 안경착용자를 제외한 여성 근로자들 335명만을 추적 조사하여 다음과 같은 결론을 얻었다. 조사군에서 입사시 시력 1.0 이상이었던 근로자의 분포는 취업 1년 후 약 25-35% 정도 감소하였으며, 2년후에는 약 40-60% 정도의 감소를 나타내었고, 3년 후 약 50-65% 정도로 감소하였고 4년후에는 약 65% 이상 감소하였다. 그러나 대조군에서는 1.0 이상의 시력을 보였던 근로자들의 비율이 취업 1년 또는 2년 후 15-30%의 감소를 보이고 있으나 그 이후에는 큰 변동이 없었다. 이들의 시력변화를 근무년수에 따라 알아보기 위하여 조사된 시력을 순위변수로 하여 Kruskall-Wallis 검정을 시행한 결과 조사군, 대조군 모두에서 근속년수에 따른 순위의 합의 평균이 년차적으로 유의하게 감소하였으나, 입사시부터 근속년수에 따른 조사군과 대조군과의 순위합의 평균에 의한 시력차 비교에서 입사시 조사군의 순위합의 평균이 유의하게 높았던 것이 근무기간에 따라 대조군의 평균이 높아지면서 통계적 유의성이 없고 대체적으로 1년 이후부터 변화가 적은 것으로 나타나 근접작업으로 인한 시력약화를 추정할 수 있었다. This study was carried out to investigate that the close distance works were associated with decreased visual acuity. 306 workers were subjects who had been recruited from 1991 to 1993 in two electronic parts manufacturing factories, and 154 workers were controls who had been employed from 1991 to 1993 in launder machine timer and general machine assembly factories. Subjects who had been employed in 1991 and 1992 were follow up from 1993 to 1995, and subjects who had been employed in 1993 were from 1994 to 1995. The male workers as well as glasses wearing workers were excluded. Only 335 female workers were followed up to study the change of visual acuity. The results were as follows; The rate of workers with visual acuity over 1.0 at recruit year in subjects group was decreased about 25-35% after 1 year, 40-60% after 2 years, 50-65% after 3 years, and 65% after 4 years. While, the rate of workers with visual acuity over 1.0 at recruit year in control group was decreased about 15-30% after 1 or 2 years, and there was no more additional visual acuity reduction after then. Kruskall-Wallis test was performed to investigate the change of visual acuity in subject and control group by work duration. The means scores of ranks in both group were significantly decreased by work duration. The mean scores of ranks in subject group at recruit year were significantly higher than those in control group at recruit year, but these differences were disappeared after 1 year work. Therefore, this suggest that close distance workers may be affected their visual acuity.

경남지역의 토양 및 농작물중 게르마늄 함량

이성태,이영한,이홍재,조주식,허종수 한국환경농학회 2005 한국환경농학회지 Vol.24 No.1

양질의 기능성 농산물 생산을 위하여 게르마늄의 농업적 이용에 대한 기초 자료를 제공하고자 경남지역의 토양을 중심으로 지역, 지형, 토양유형 및 토성별 게르마늄 함량과 자연상태에서 재배한 농작물별 게르마늄 함량을 조사하여 그 분포특성을 검토한 결과는 다음과 같다. 토양중 게르마늄 함량을 분석할 결과 성남지역 논 토양 평균 함량은 0.24 mg/kg 이었고, 마산시, 진주시 및 하동군 지역이 0.30 mg/kg 이상으로 높았다. 지형별로는 홍적대지가 0.26 mg/kg으로 약간 높았으나 지형에 따른 큰 차이는 없었다. 토양유형별 게르마늄 함량은 보통답이 0.27 mg/kg으로 사질답과 습답에 비하여 높았으며, 토성별로는 미사질양토가 0.27 mg/kg으로 비교적 높았다. 일반농작물중 게르마늄 함량은 곡류>채소류>과일류 순으로 높았고, 쌀과 보리는 각각 약 68 및 48 μg/kg의 게르마늄을 함유하고 있었으며, 단감과 배는 각각 약 11 및 23 μg/kg으로 전반직으로 낮을 수준이었다. 채소류중 게르마늄 함량은 엽채류>근채류>과채류 순으로 높았으며 특히 상추와 열무중 게르마늄 함량이 각각 약 62 및 65 μg/kg으로서 높았다. 약용작물중 게르마늄 함량을 신선초(Angelica keiskei), 토천궁(Ligusticum chuanxiong), 인삼(Panax ginseng), 삽주(Atractylodes macrocephala), 백지(Angelica dahurica), 맥문동(Liriope platyphylla) 및 도라지(Platycodon grandiflorum)에서 100 μg/kg 이상으로 게르마늄 함량이 높았으며, 선학초(Agrimonia pilose) 및 일당귀(angelica acutiloba)의 함량은 각각 37 및 30 μg/kg으로 낮았다. To investigate the germanium content in paddy soil in Gyeongnam province, 310 paddy soil samples were collected at 19 areas in Gyeongnam, Ulsan and Busan. Contents of germanium in paddy soils were analyzed in different topographies, soil types and soil textures. Average content of germanium in Gyeongnam was 0.24 mg/kg, those of Masan, Jinju and Hadong were above 0.30 mg/kg. Germanium content with different topographies were no difference. Germanium contents in different soil types were 0.27 mg/kg in well adapted soil and 0.23 mg/kg in poorly drained soil. Germanium contents in different soil textures were 0.27 mg/kg in silt loam and 0.23 mg/kg in sandy loam. To determine germanium content on agricultural product in the field, content of germanium in cereals, vegetables and fruits were analyzed. Germanium content of agricultural product was high in the order of cereals>vegetables>fruits. In case of vegetables, germanium contents were high in the order of leaf vegetables>root vegetables>fruit vegetables. Germanium contents were high with 62 and 65 μg/kg in lettuce and young radish, respectively. To analyze the germanium content in medicinal plant, samples were collected from 19 medicinal plants at Hamyang areas. Germanium contents in Angelica keiskei, Ligusticum chuan wng, Panay ginseng and Atractylodes nacrocephala were relatively high with 100 μg/kg above.

무보수 호흡용 보호구 착용이 2차 제련 연작업자들의 연폭로지표에 미치는 영향

이영구,황보영,리갑수,이성수,안규동,이병국 순천향대학교 산업의학연구소 1997 순천향산업의학 Vol.3 No.1

It is often impossible to improve working condition in small scaled lead industries due to inherent old work process and lack of capital to improve it. This is particularly true in secondary smelting industries in Korea. Alternative ways to protect workers in these industries are respiratory protection and job shift if at all possible to less harmful workplace. This study intended to evaluate the effect of maintenance free respirator and job shift of lead workers to other non-lead workplace on the level of lead exposure of workers in terms of blood zinc protoporphyrin as an index of lead absorption and intoxication of lead workers. Seventy three workers of one secondary smelting industry whose work duration was more than 4 months were studied. All workers were classified into 4 groups such as managemental workers(8), non-lead workers(14), lead workers(44) and shift workers(7). Personal data such as age and work duration were collected and air concentration of lead in each workplace were also measured. Blood ZPP was chosen as an index of biological monitoring and was measured regularly once a month for 5 months study period. The results obtained were as follows: 1. There were no significant differences of mean blood ZPP during 5 months study period in management workers and non-lead workers showing the range of 23.1-26.5 ㎍/100ml and 22.2-24.2 ㎍/100ml respectively. 2. Rapid reduction of mean blood ZPP from first month (203.0 ± 106.7 ㎍/ 100ml) to third month (128.4 ± 75.1 ㎍/100ml) was noticed and after 3 months period there was no further reduction of blood ZPP in lead workers. 3. The initial mean blood ZPP of shift workers who moved to non-lead workplace was 394.3 ± 114.9 ㎍/100ml and their mean blood ZPP were steadily decreased every month from 344.3 ± 98.4 ㎍/100ml of first month to129.9 ± 33.5 ㎍/100ml of 4th month). 4. The average reduction rate of blood ZPP based on initial blood ZPP was 37.0% in lead workers for 3 months period and 67.1% in shift workers for 4 months period. With above results it was observed that respiratory protection and work shift could protect lead workers from lead exposure by reducing lead exposure in secondary smelting industry which had fairly bad working condition. But for a complete prevention of lead poisoning, it has certain limitation and should be used as an interim method until fundamental engineering control of workplace.