표면개질에의한 LDPE와Aluminum간의 접착력 향상에 관한 연구

정배영,정영배,류승훈 한국고분자학회 2000 한국고분자학회 학술대회 연구논문 초록집 Vol.2000 No.10

LDPE와 Aluminum 간의 접착력 향상에 관한 연구

정배영,박진한,류승훈 한국고분자학회 2000 한국고분자학회 학술대회 연구논문 초록집 Vol.2000 No.4

저밀도 폴리에틸렌의 표면개질과 이를 이용한 저밀도 폴리에틸렌 / 알루미늄 라미네이트의 접착특성

정배영(B . Y . Jung),류승훈(S . H . Ryu) 한국고무학회 2001 엘라스토머 및 콤포지트 Vol.36 No.3

N/A Ultraviolet photografting of acrylic acid onto low density polyethylene was characterized using XPS and contact angle measurement. Effects of surface modification of LDPE and aluminum on LDPE/Al laminate were also investigated. Contact angle decreased significantly at initial state and tends to level off with increasing UV irradiation time. The improvement of hydrophilicity was due to the presence of acrylic acid on LDPE surface. Graft of acrylic acid onto LDPE was also identified from Ols/Cls ratios in XPS spectrum. Adhesion strength of LDPE-g-AAc/Al laminate showed about 30 times higher than LDPE/Al system and it could be attributed to the increase of polarity of LDPE surface. Chemical treatment of Al surface using sulfuric acid/sodium dichromate also increased the adhesion strength of LDPE/Al laminate. Adhesion strength of LDPE/Al laminate decreased significantly under acetic acid.

초등학교 게임수업에서의 팀 선호 유형 분석

정배영,부기원 江原大學校附設體育科學硏究所 2004 江原大學校附設體育科學硏究所論文集 Vol.- No.27

This study aims to analyze team preference types according to various variables in game activity situations in elementary school class. It is possible to identify students' participation level in game activities in class by examining team preference types indicated in forming teams with the variables of gender differences, of the time of measurement - in the beginning and at the end of a school term, and of team formation of the same-sex members and mixed-sex members. And then this study addresses individual characteristics of students and locates the students alienated from activities in order to create environments that can make all students enjoy class. To serve this purpose, 41 students (23 male and 18 female students) from 2nd class of Year 4 at Nara Elementary School(Alias) in Chuncheon were chosen for the subjects of this study. This study addressed a series of physical training classes conducted by a physical education teacher by observing them, and another series of physical training classes conducted by the researcher herself. The data were collected by resorting to participatory observation, descriptive observation, in-depth interviews and a survey. The data collected were analyzed by means of constant comparative method, examination by member, diversified analytical method, and agreement by colleagues. The results drawn from the above processes are as follows: First, team preference types by gender difference indicated that male students preferred 'victory pursuing style' and 'activity pursuing style', while female students went for 'close friends prefering style'. Second, team preference types in the beginning and at the end of a school term revealed that students preferred 'indifferent style' and 'activity pursuing style' in the beginning of a term, while they preferred 'victory pursuing style' at the end of the term. Third, team preference types in team formation of the same-sex members and mixed-sex members shoed that in the teams with the same-sex members, the styles of 'victory pursuing style', activity pursuing style' and 'close friends preferring style' were evenly distributed, whereas in the teams with mixed-sex groups a lot more students preferred 'victory pursuing style'.

메타세콰이어나무 열매와 잎의 영양성분 및 항산화 활성

배영일(Young-Il Bae),이주원(Ju-Won Lee),하태정(Tae Jung Ha),황승하(Seung-Ha Hwang),신창식(Chang-Sik Shin),정창호(Chang-Ho Jeong),김일훈(Il-Hun Kim),심기환(Ki-Hwan Shim) 한국식품영양과학회 2013 한국식품영양과학회지 Vol.42 No.3

메타세콰이어 나무 열매와 잎을 기능성식품 소재로 활용하기 위한 기초자료를 제공하기 위하여 화학성분 및 항산화활성을 조사하였다. 열매와 잎의 가용성 무질소물의 함량은 각각 69.04% 및 50.47%로 나타났으며, 열매의 총 페놀성 화합물 함량은 19.95 mg/GAE g이었고, 잎의 총 페놀성 화합물의 함량은 21.75 mg/GAE g으로 열매보다 잎에서 높은 함량을 보였다. 열매와 잎에 많이 함유되어 있는 무기성분으로는 Ca(2,136.08와 304.85 mg/100 g), K(1,355.53와 1,144.04mg/100 g) 및 P(426.30와 350.50 mg/100 g)이었다. 아미노산은 aspartic acid, glutamic acid 및 proline이 상대적으로 높았으며, 필수아미노산 중에서는 leucine이 상대적으로 높은 비율을 보였고, methionine과 cystine은 낮은 함량을 보였다. 메타세콰이어 열매와 잎의 열수 추출물을 이용하여 라디칼 소거활성 및 환원력을 조사한 결과 농도 의존적인 경향을 보였으며, 특히 잎 열수 추출물에서 높은 항산화 활성을 보였다. 따라서 메타세콰이어나무 잎의 폴리페놀성 화합물은 천연항산화제와 같은 기능성식품 소재로 활용가능성이 매우 높을 것으로 생각된다. The nutrients and antioxidative activities of fruits and leaves from Metasequoia glyptostroboides were investigated to provide basic data for the future development of functional foods. The nitrogen-free extract contents of fruit and leaves were 69.04% and 50.47%, respectively. Total phenolic content was higher in leaves (21.75mg/GAE g) compared to the fruit (19.95 mg/GAE g). The mineral components of fruit and leaves mainly consisted of calcium (2,136.08 and 304.85 mg/100 g, respectively), potassium (1,355.53 and 1,144.04 mg/100 g, respectively), and phosphorous (426.30 and 350.50 mg/100 g, respectively). In terms of amino acid composition, aspartic acid, glutamic acid, proline, and leucine were relatively high, but methionine and cystine were low. The hot water extract from leaves was a more potent free radical-scavenger and had higher reducing activities than extracts from fruit. Thus, phenolics of M. glyptostroboides leaves can be utilized as an effective functional food substance for its natural antioxidant properties.

산지별 마늘의 화학성분 및 항균활성

정창호,배영일,이진화,노정관,신창식,최진상,심기환 경상대학교 농업생명과학연구원 2009 농업생명과학연구 Vol.43 No.1

마늘을 각종 기능성 식품 재료로 이용하기 위한 기초자료를 제공하기 위하여 산지별 마늘의 화학성분 및 항균활성을 조사하였다. 색도 중 L값은 53.41∼57.15, a값은 -3.49∼-4.38 및 b값은 11.47∼17.55였으며, 일반성분 중 수분, 조단백질, 조지방, 가용성 무질소물, 조섬유 및 회분 함량은 각각 65.24∼71.96, 6.24∼9.35, 0.21∼0.49, 19.01∼22.72, 0.58∼0.95 및 1.01∼2.01%로 나타났다. 산지별 마늘의 주요 무기성분으로는 Na, Mg, K, Ca 및 P였으며, 그 함량은 각각 27.22∼112.03, 18.17∼32.56, 242.16∼569.28, 28.60∼63.93 및 117.72∼265.21 mg%였고, 유리당은 sucrose, glucose 및 fructose였다. 마늘은 17종의 아미노산이 분석되었으며, 그 중 proline, arginine, glutamic acid 및 aspartic acid가 주요 아미노산으로 나타났고, 총 아미노산 함량은 2,709.33∼4,561.04 mg%이었다. 비타민 C 함량은 2.966∼8.673 mg%이었다. 산지별 마늘의 주요 지방산으로는 linoleic acid, oleic acid 및 palmitic acid였으며, 불포화지방산이 72.18∼74.35%였고, 포화지방산은 25.65∼27.82%였다. 산지별 마늘 물 추출물을 이용하여 항균활성을 측정한 결과, 농도 의존적으로 그램 음성 및 양성 모든 세균에서 높은 항균활성을 보였다. The chemical components and antimicrobial activities of garlic from different area were investigated and analyzed to provide basic data for functional food materialization and processing. Hunter's values of garlic from different area were L 53.41∼57.15, a -3.49∼-4.38 and b 11.47∼17.55. The moisture, crude protein, crude fat, nitrogen free extract, crude fiber and ash were 65.24∼71.96, 6.24∼9.35, 0.21∼0.49, 19.01∼22.72, 0.58∼0.95 and 1.01∼2.01%, respectively. The major minerals of garlic from different area were Na(27.22∼112.03), Mg(18.17∼32.56), K(242.16∼569.28), Ca(28.60∼63.93), P(117.72∼265.21 mg%) and major free sugars were sucrose, glucose and fructose. The major amino acids of garlic from different area were proline, arginine, glutamic acid and aspartic acid and content of total amino acid was 2,709.33∼4,561.04 mg%. The ascorbic acid content of garlic from different area was 2.966∼8.673 mg%. Composition of fatty acids of garlic from different area were linoleic acid, oleic acid and palmitic acid, unsaturated fatty acid and saturated fatty acid contents were 72.18∼74.35 and 25.65∼27.82%, respectively. Antimicrobial activities of garlic extracts as different area increased depends on concentration and showed the high antimicrobial activities against Gram(+) and Gram(-).

Antioxidant Activities of Aqueous Extracts from Three Cultivars of Guava Leaf

정창호,배영일,박수정,이시경,허선진 한국식품과학회 2012 Food Science and Biotechnology Vol.21 No.6

In order to obtain basic data required for utilization of guava leaf as a functional substance, the antioxidant activities of aqueous extracts from 3 cultivars of guava leaf (‘Apple color’, ‘Ruby’, and ‘Safeda’) were examined. The total phenolic contents of the aqueous extracts ranged from 257.38 to 293.25 mg/g gallic acid equivalents. DPPH, ABTS, reducing power, ferric reducing antioxidant power (FRAP), ferric thiocyanate (FTC), and malondialdehyde (MDA) assays indicated that the aqueous extract of the ‘Ruby’ cultivar was the most potent radicalscavenger and reducing agent compared to the other 2cultivars. Therefore, this study verified that aqueous extract from the ‘Ruby’ cultivar possessed strong antioxidant activity that correlated to its high level of phenolics,particularly gallic acid. In conclusion, the aqueous extract of the ‘Ruby’ cultivar of guava leaf may be utilized as an effective source of functional food materials, including natural antioxidants.

자가 이식편에 의한 전방십자인대 재건술의 실패요인 : 침해(Impingement)에 대하여 About Impingement

배영재,정영복,태석기 대한슬관절학회 1995 대한슬관절학회지 Vol.7 No.2

The aim of this study was to investigate the influnce of impingement of the geaft by intercondylar roof to stability of the joint and clinical result after reconstruction of anterior cruciate ligament(ACL) with bone-patellar tendon-bone graft. Among 74 cases of ACL reconstruction were done by one tunnel arthroscopic technique from May l991 to February 1994,30 casas with excellent result and 4 cases with poor result were analysed by radiological measurements & stability assessed hy Lachiman test and KT-1000 arthrometer, OAK(Orthopadische Arbeitsgruppe Knie) knee score. Impingement was assessed by relationship between the locations of intersection points on tibial tunnel plateau rnade by the lines drawn along the tibial tunnel and the slope of femoral inteizondylar roof in full extension lateral roentgenogram. Impingement was defined as severe(group 1) which the line of tibial tunnel was in front of the line of intercondylar slope; moderate or non when the former was at the same point or behined the latter(group II). In addition to that, the degree of impingement was evaluated by dividing the distance between the intersection point of intercondylar slope line an anterior margin of tibial tunnel by the width of tibial tunnel, and expressed in terms of percentage. The were as follows; 1. There were 2 cases of group I(severe impingernent) and 32 cases of group II (moderate or no impingement) 2. Regarding the range of motion, one case of group I showed limitation of extension under l0 degrees, and one case of group II showed limitation of flexion under 15 degrees. 3. Lachman test was positive in one case of group I and 3 cases of group II, and negative in one case of y oup I illld 29 cases of group II. 4. Maximal manual displacement measured by KT-1000 arthrometer was 4.81.0 in group I and 1.0+- l.7 in group II(statistically significant difference al p&.00]). 5. The degree of impingement obtained by radiological measurement was 123% in group I and 34% in group lI(statistically significant difference at p=0.001). 6. Accarding to OAK criteria, one cases of group I and 29 cases group II showed excellent result, one case of group I and 3 cases of group II showed poor result. From above results, the presence and degree of impingement assessed by full extension lateral roentgewgram seems to have influence on the stability and clinical result after reconstruction of ACL by one tunnel arthrosccpic technique.

시판 비파나무잎차의 영양성분 및 항산화 활성

정창호,김일훈,심기환,배영일 경상대학교 농업생명과학연구원 2011 농업생명과학연구 Vol.45 No.4

본 연구에서는 시판 비파나무잎차의 영양성분 분석 및 열수 추출물을 이용하여 항산화 효과를 조사하였다. 일반성분은 수분 5.34%, 조단백 8.38%, 조지방 13.26%, 가용성 무질소물 46.21%, 조섬유 19.24% 및 조회분 7.57%순으로 함유하고 있었다. 비타민 C 함량과 총페놀 함량은 각각 0.47 mg/100 g 및 42.55 mg/g이였다. 무기성분은 Ca, K 및 Mg 순으로 높게 나타났으며, 그 함량은 각각 1,624.01, 1,099.66 및 192.70 mg/100g이었다. 비파나무잎차의 아미노산 분석 결과 glutamic acid (565.98 mg/100 g)가 가장 높게 함유되었고, 반면 가장 낮은 함량은 cystine (12.97 mg/100 g)이였다. 시판 비파나무잎차 열수 추출물 농도 1,000 μg/mL를 기준으로 했을 때 각각 86.87%와 98.14%의 ABTS 및 DPPH 라디칼 소거활성을 보였으며, 환원력과 ferric reducing antioxidant power (FRAP)는 농도 의존적 항산화 활성을 보였다. 따라서 시판 비파나무잎차는 항산화제와 같은 기능성 식품 소재로 이용가능성이 높을 것으로 생각된다. Nutritional components and antioxidant activities of commercial loquat leaf tea (CLLT) were evaluated. Proximate compositions were as follows; moisture 5.34%, crude protein 8.38%, crude fat 13.26%, nitrogen free extract 46.21%, crude fiber 19.24% and crude ash 7.57%, respectively. Ascorbic acid and total phenolics content of CLLT was 0.47 mg/100 g and 42.55 mg/GAE g, respectively. Mineral elements were Ca 1,624.01 mg/100 g, K 1,099.66 mg/100 g, and Mg 192.70 mg/100 g, respectively. Amino acid contents of CLLT were very rich in glutamic acid 565.98 mg/100 g and deficient in cystine 12.97 mg/100 g. The 2,2'-azino-bis (3-ethylbenzthiazoline-6- sulfonic acid) diammonium salt (ABTS), 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activities of hot water extract from CLLT were 72.51% and 90.11%, respectively at a concentration of 1,000 μg/mL. Reducing power and ferric reducing antioxidant power (FRAP) of hot water extract from CLLT were increased in a dose dependent manner. Therefore, these results suggest that the hot water extract of CLLT possess antioxidant activities and thus it has great potential as a source for functional food such as natural antioxidant.

질경이 추출물의 DPPH 라디칼 소거효과 및 항균활성

정창호(Chang-Ho Jeong),배영일(Young-Il Bae),심기환(Ki-Hwan Shim),최진상(Jine-Shang Choi) 한국식품영양과학회 2004 한국식품영양과학회지 Vol.33 No.10

질경이를 새로운 기능성 식품소재로 활용하기 위한 일환으로 차전초의 메탄올 추출물을 각종 용매를 이용하여 계통ㆍ분획한 후 DPPH 라디칼 소거효과, 환원력, 아질산염 소거효과 및 항균활성에 대하여 조사하였다. DPPH 라디칼 소거효과는 분획물 중 에틸아세테이트와 부탄올 분획물(400㎍/5 mL)에서 60% 이상 높은 라디칼 소거율과 금속에 대한 강한 환원력을 나타낸 반면, 물, 클로로포름 및 헥산 분획물은 낮은 소거효과를 나타내었다. 질경이의 각 분획물을 농도별로 첨가한 아질산염 소거효과는 에틸아세테이트와 부탄올 분획물 500 ㎍ 첨가시 70~80% 이상 높은 아질산염 소거 효과를 나타내었다. 항균활성은 에틸아세테이트, 클로로포름 및 부탄올 분획물 순으로 높게 나타났으며, 에틸아세테이트 분획물의 경우 Staphylococcus aureus, Bacillus cereus 및 Vibrio parahaemolyticus 등의 그람양성 및 음성균 모두 강한 항균효과를 나타내었다. To develop the functional food, methanol extracts of dried plantain (Plantago asiatica L.) was fractionated in hexane, chloroform, ethyl acetate, butanol and aqueous fraction. DPPH radical scavenging effect, reducing power, nitrite scavenging effect and antimicrobial activities of these fractions were investigated. Ethyl acetate fraction among these fractions showed the highest effect of all experiments. Ethyl acetate fraction showed about 60% scavenging effect on the DPPH radicals at 400 ㎍/5 mL. Nitrite scavenging effect of ethyl acetate and butanol fraction was more than 70~80% at concentration above of 500 ㎍. Among various solvent fractions from methanol extracts of plantain, ethyl acetate fraction showed the highest inhibitory effect on the microorganism such as Staphylococcus aureus, Bacillus cereus and Vibrio parahaemolyticus at 5 mg/disc.