Zea Mays L. 의 特殊成分과 澱粉의 X線 回析度

李容億,曺貞淳,申東旿 明知大學校 自然科學硏究所 1984 자연과학논문집 Vol.2 No.-

韓國産 메옥수수, 찰옥수수, 爆裂種에 대한 一般成分,無機質을 定量分析하고 또 胚芽油脂를 油出定量하고 그油脂의 物理,化學的 性質을 判斷하였다. 한편 各各의 녹말은 生 및 糊化시켜서 그의 X-線 회절도를 作成 比較 檢討하였다. 1.一般成分은 各各 Table 1에 表示한 바와 같다. 2.無機質成分은 各各 Table Ⅲ에 表示한 바와 같다. 3. 油脂의 物理化學的 性質 가.油脂의 色度差는 Table V에 表示한 바와 같다. 나.其他 粗脂肪, 比重, 굴절율, 요오드값, 산값, 검화값, 과산화물값, 불검화물값등은 Table Ⅳ에 表示한 바와 같다. 다.녹말에 대한 X-線 회절도의 試驗結果는 Table Ⅶ에 表示된 바와 같이 各 種間의 差異가 없었다. The general constituents and the mineral contents of White Dent Corn, Waxy Corn and Corn, all harvested in Korea, were first examined, and then the quality of each corn was examined through the test for the Physiochemical property of fat extracted from the germ of each corn. The result of qualitative comparison of starch, made by means of X-Ray Powder diffraction for the raw and the boiled starch of each corn, especially to find out any differences among the White Dent, the Waxy and the Pop Corn based on the point of starch, has reached the following conclusions; (1) The general consitutents and each content of the White Dent Corn are ; protein 10.3%, fiber 1.89%, Carbohydrate 69.93%, starch 64.5%, fat 5.36% and ash 1.65%. From it, it could be pointe out tthat the White Dent Corn contained more protein and ash than the others. Compared with the others, th Waxy Corn contained more Carbohydrate , showing its constitutents and contents as follows; protein 9.74f%, fiber 2.08%, Carbohydrate 71.04%, starch 65.5% fat 4.87% and ash 1.64%. As to the Pop Corn, however, it showed a relatively higher content of fat than the rest. Its constituents and each content were as follows ;protin 9.67%, fiber 2.19%, Carbohy-drate 69.39%, starch 64.0%, fat 6.62% and ash 1.64%. (2)Mineral Constituents; Regarding the mineral constiruents contained by the three kinds of corn which were sampled here for this study, the following results were noted; In case of the White Dent Corn, the content of P and Si were high, but the contents of Al and Zn were low. As for the Waxy Corn, the contents of Cu and Si were found less but the content of Al was found a little . Regarding the Pop Corn, however, the contents of its mineral constituents were higher in every respect than the other kinds of corn. Among them, especially , the contents of Si, Cu, Al, and Zn were a little higher. (3)Physiochemical Quality of Fat: The fat sampled here for the test was good enough with the one extracted through the method of pressure, oil pressing method, without any special refining process of high level.It was noted that the specific gravity of fat was 0.911 in the White Dent Corn, and 0.909 in the Pop Corn, which showed approximately 0.003 lower than the standard value specified b6 the Ministry of Health and Social Affairs. In the Waxy Corn, however, its value was almost as much as the specified level. As to the ditribution status of fat constituent, the Pop Corn contained the largest portion of all, showing that the Pop Corn 6.62%, the White Dent Corn 5.36% and the Waxy Corn 4.87% respectively. The iodine value of the sampled fat was 126 in the Waxy Corn, which belonged to the highest one of three kinds of Corn. And acid value of all the corn was generally a little higher than the standard required by the Ministry of Health and Social Affairs, since the fat was extracted from germ by means of ether and then was dried in the temperature of 90℃. In this case it was also noted that the Waxy Corn contained as much as the standard level. The White Dent Corn and the Pop Corn, however, wasd not up to the standard value. (4) Result of test for Starch X-Ray Power Diffraction: Starch, as its crystalline structure differs according to its kind, can be classified into three patterns such as A, B, and C. The raw starch (β-starch) sampled here belonged to A pattern and all the bolied starch (α-starch) to B pattern. When all the above were compared, all the sampled corn, White Dent, Waxy and Pop, did not show much difference in themselves.

A Study of the Relationship between Parental Alcohol Problems and Alcohol Use among Adolescent Females in Republic of Korea

Shin, Dong-Eok,Delva, Jorge The Korean Society for Preventive Medicine 2004 예방의학회지 Vol.37 No.3

Objectives : The study was designed to test if alcohol use and alcohol-related problems among adolescent females are related to their parents' level of alcohol problems. Methods : In 2001, a stratified sample of 2077 adolescent females, grades 10-11, from twelve female-only high schools located in a large metropolitan city in the Republic of Korea completed a questionnaire about alcohol use, parental attention, and parental alcohol consumption, and other risk and protective factors. Data were analyzed with chi-square and regression analyses. Results : Nearly 63% of the student drinkers had experienced at least one to two alcohol-related problems in their lives. Two-thirds of all 2077 students indicated that at least one of their parents had an alcohol-related problem and that approximately 29% had experienced several problems. Results of random effects ordinal logistic regression analyses suggest a dose-response relationship between parental and youth alcohol-related problems. Youth who report having parents with some and many alcohol problems were 30% (Odds Ratios [OR] = 1.30; 95% Confidence Interval [CI] = 1.10 - 1.53) and 55% (OR = 1.55; 95%CI = 1.23 - 1.95) more likely to experience alcohol-related problems than youth whose parents do not have alcohol problems, respectively, after statistically adjusting for important covariates. Conclusions : This study presents evidence that alcohol-related problems among adolescent female students is highly prevalent. Also, the study findings reveal a high percentage of parents with alcohol problems, as reported by students. This study presents evidence of what might be a hidden problem among adults and youths in the Republic of Korea that merits serious attention.

Measurement of Water Stress for Cucumber Seedlings using Infrared Thermography

( Dong-eok Kim ),( Kwang-soo Bae ),( Youn-ah Shin ),( Shin-hee Han ),( Dong-hyeon Kang ),( Young-hoe Woo ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1

The purpose of this study was to evaluate the moisture stress of cucumber seedlings by measuring the leaf temperature of cucumber seedlings using a thermal imaging camera. The change of leaf temperature of cucumber seedlings by the soil water content was continuously observed. Water stress of cucumber seedlings was estimated by the difference between leaf temperature and temperature. The leaf temperature of cucumber seedlings were measured using the thermal image camera. Leaf temperature of cucumber seedlings was changed continually with time. Leaf temperature of cucumber seedlings was lower at high soil water content. In the case of lack of soil water content, it was found that the leaf temperature was higher than the air temperature and it means that cucumber seedlings is under water stress. There were significant differences in the leaf temperature of stressed plants and non-stressed plants.

A Study of the Relationship between Parental Alcohol Problems and Alcohol Use among Adolescent Females in Republic of Korea

Dong-Eok Shin,Jorge Delva 대한예방의학회 2004 예방의학회지 Vol.37 No.3

열영상을 이용한 토마토묘의 수분스트레스 측정 기초연구

김동억 ( Dong-eok Kim ),배광수 ( Kwang-soo Bae ),신윤아 ( Youn-ah Shin ),한신희 ( Shin-hee Han ),강동현 ( Dong-hyeon Kang ),우영회 ( Young-hoe Woo ) 한국농업기계학회 2017 한국농업기계학회 학술발표논문집 Vol.22 No.2

적외선을 이용한 열영상은 작물의 환경스트레스 탐색, 기공활력에 따른 생육반응 연구 등을 위한 기술로 자리매김하고 있다. 본 연구는 열영상카메라를 이용하여 토마토묘의 열영상을 획득하고 체온을 분석하여 수분스트레스 추정가능성을 보고자 하였다. 열영상 기술을 적용하여 토마토묘의 일중 엽온 변화를 연속적으로 관찰하였다. 수분스트레스 여부는 엽온과 기온의 차를 통해 비교하였다. 열영상은 열화상카메라(A325sc, FLIR systems USA)이용하여 토마토 육묘트레이 상부에 설치하여 연속적으로 촬영하였으며, 촬영한 영상은 1분 간격으로 노트북에 저장되도록 하였다. 토마토의 잎에 관심영역을 12군데 설정하고 온도변화를 관찰하였다. 기온은 데이터로거(U12-011, Hobo, USA)로 측정하였다. 실험결과, 야간에 기온이 엽온 보다 다소 높은 경향이었으며, 오전에 엽온이 기온보다 높은 지점이 일부 나타나기 시작하였으며, 오후 1시경부터 측정지점의 엽온 평균이 기온 보다 낮았다 높아지기를 반복하다 4시경부터 엽온평균이 기온 보다 낮은 것으로 나타났다. 각 시각별 지점별 기온과 엽온 간의 차는 최소 0.08°C에서 최대 3.6°C의 표준편차를 보였고, 최대 10°C의 온도차이를 보여 접촉 방식에 의한 단순히 몇 지점 만의 온도측정으로는 정확한 스트레스 여부를 판단하기는 다소 어려울 것으로 보인다. 작물체의 엽온은 수분스트레스 뿐만 아니라 일사, 기온, 습도, 풍속, 기공개도 등 여러 요인과 관련이 있다. 따라서 엽온 측정 만으로 수분스트레스를 정확히 진단하는 데는 한계가 있기 때문에 다른 요소도 함께 포함한 연구가 수행되어야 할 것으로 판단된다.

한식 된장 발효 환경 개선을 위한 환경 조사 연구

강동현 ( Dong Hyeon Kang ),홍순중 ( Soon Joong Hong ),신윤아 ( Yoon Ah Shin ),김동억 ( Dong Eok Kim ) 한국농업기계학회 2021 한국농업기계학회 학술발표논문집 Vol.26 No.2

“한국 기후변화 평가보고서 2020”에 따르면 우리나라의 2010년대 평균지표 온도는 13.0℃로 1980년대 12.2℃보다 0.8℃ 상승하였고, 폭염일수도 꾸준히 증가하고 있어 기후변화가 심각화되고 있다고 하였다. 이러한 기후변화로 인하여 노지환경에 노출되어 있는 된장은 독소 위험성이 증대되어 가고 있다. 식품의약품 안전처(2020)에 따르면 한식된장 517개 중 33개 제품에서 아플라톡신이 기준(B1, B2, G1, G2의 합이 15.0 μg/ kg 이하) 초과 검출되었다고 보고된 바 있으며, 연구에 따르면 된장 숙성환경이 40℃이상 고온에 노출되면 Bacillus cereus 생존기간 30일 이상 증대되어 위험성이 높아진다고 분석하였다. 또한 이상 고온으로 인하여 천년 이상 지속된 전통 노지형 장류는 생산 수율과 품질 저하 등 생산관리와 품질 안전성 등 현장에서의 많은 문제가 발생하는 것으로 보고되고 있다. 본 연구에서는 기후변화 등에 따른 된장 발효 환경 개선을 위하여 온실을 설치하고 내부에 된장이 숙성되고 있는 장독을 배치하여, 외부환경에 따른 장독 내부의 환경을 분석하였다. 시험 장소는 강원 춘천, 평창, 전남 순천, 담양의 농가를 선정하고, 각 지역에 내재해규격 07-단동-2(폭(6m), 측고(1.7m), 동고(3.3m)) 온실을 설치하고 환경을 분석하였다. 온실 내부의 제어요인은 측창, 차광커튼, 순환팬, 배기팬을 설치하여 환경 개선을 위하여 제어하였다. 제어 순서는 설정온도에 맞춰 측창 → 차광 → 순환팬 → 배기팬 순으로 작동하도록 구성하였으며, 각 장치별 설정온도를 설정할 수 있도록 하였다. 환경제어장치는 내외부 온습도, 일사, 우적, 장독 내 온도 등이 자동 저장 및 제어에 활용되도록 하였다. 온실 내부 환경을 조사한 결과 7월 중 시험온실 내외부 온도 차는 주간 약 5℃ 내외, 야간 약 2℃ 내외가 발생하는 것으로 조사되었고, 장독 내부 온도는 온실 내부온도가 약 40℃일 때 약 33℃ 이내로 유지되는 것으로 조사되어 태양빛에 노출된 노지 된장의 내부온도가 최대 60~70℃보다 낮은 것으로 조사되었다. 또한 온실에 탑재된 설비의 제어를 통해 장독 내부의 온도는 독소에 노출될 수 있는 40℃ 이내로 제어가 가능하여, 온실을 통한 노지 된장의 숙성환경 조성이 가능할 것으로 판단되었다.

차량통과 하중을 이용한 운동에너지 발전 시스템

이동환(DONG HWAN, LEE),안상억(SANG EOK, AHN),신우철(WOO CHOL, SHIN) 한국소음진동공학회 2013 한국소음진동공학회 학술대회논문집 Vol.2013 No.10

앵커 정착 부 확공을 위한 펄스방전의 양상과 작용압력에 관한 연구

신병우 ( Shin Byung-woo ),윤수동 ( Yun Su-dong ),차경섭 ( Cha Kyung Sub ),허억준 ( Hur Eok-jun ) 한국구조물진단유지관리공학회 2008 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.12 No.1

When the electricity is not flowing because the certain distance lies between positive (+) pole and negative (-) pole of electricity, we call the status as the air insulation. When the voltage is gradually increased to this status, the electricity is flowing breaking this insulation status at certain point, which we define as the insulation is broken. When the insulation is broken, big expansion pressure is occurred, which is the essence of technology of pulse discharge of electricity. We are utilizing this technology of pulse discharge of electricity to expand and press the cavity of ground foundation of anchor settlement with the aim of making the anchor body with great pushing power. The results of measuring the pressure at the experiment of chamber model generated are average 8 MPa with 250 mm of diameter (at 5000 voltage applied), and 16 MPa with 110mm (at 3500 voltage applied) respectively. This is direct pressure working to the wall of chamber which is equivalent to the wall of anchor settlement part where the intensity of pressure generated can be adjusted by regulating the voltage. In the future, it shall be verified about applicability to the ground through experiment of electricity discharge on the real ground; and the increase of pushing power through the expansion and press of cavity.

앵커 정착부 확공을 위한 펄스 에너지 매개변수에 관한 연구

신병우(Shin Byung- Woo),윤수동(Yun Su- Dong),차경섭(Cha Kyung Sub),허억준(Hur Eok-Jun),김철영(Kim Cheol-Young) 대한토목학회 2007 대한토목학회 학술대회 Vol.2007 No.10

Biodegradation of Endosulfan by the isolated Bacteria , Klebsiella pneumoniae KE-1

(Jang Eok Kim),(Gi Seok Kwon),(Dong Geol Kim),(Kee Sun Shin),(Sung Cheol Koh) 한국환경농학회 2001 창립 20주년 기념 심포지엄 및 추계학술발표회 Vol.- No.-