산지하천에서 빛가 초식에 의한 부착조류의 생체량변화

김현주,윤해순,김진수,김현우,주기재 ( Hyun Joo Kim,Hae Soon Yoon,Jin Soo Kim,Hyun Woo Kim,Gea Jae Joo ) 한국하천호수학회 1997 생태와 환경 Vol.30 No.4

Effects of light and grazing on the biomass development of periphyton were evaluated using natural and artificial substrata (unglazed tile: 3.7×9.5x2cm) in a partially shaded 2nd order mountain stream. In open canopy (relative light input 20∼50%), a relatively high biomass (chl. a: 9.5±3.0 mg/m^2, n=25) was maintained than that of closed canopy(<6% of light input. 3.2±0.9 mg/m^2, n= 17). Due to shading and frequent rainfalls, biomass was lower during the summer than in the spring and winter. During the spring, colonization of periphyton on artificial substrata occurred faster than in winter and it took a minimum of 5∼6 weeks to reach the biomass of natural substrata (8∼9mg/m^2). When snails were allowed to freely enter the chamber (mean density: 114 ind./m^2) with artificial substrata, biomass accumulation (chl. a, AFDW) was low compared to the snail excluded enclosure (50∼90% of ungrazed substrata). It was concluded that the light input on periphyton biomass In a partially shaded stream played a more important role than glazing.

평택시 군용비행장 주변지역 주민건강조사

김현주,노상철,권호장,백기청,이무용,정재윤,임명호,구미진,김창훈,김혜영,임정훈,김동현,Kim, Hyun-Joo,Roh, Sang-Chul,Kwon, Ho-Jang,Paik, Ki-Chung,Rhee, Moo-Yong,Jeong, Jae-Yun,Lim, Myung-Ho,Koo, Mi-Jin,Kim, Chang-Hoon,Kim, Hae-Young,Lim, Je 대한예방의학회 2008 예방의학회지 Vol.41 No.5

Objectives : We conducted an epidemiologic survey to evaluate the effect of the aircraft noise exposure on the health of the residents near the military airbases in Pyeongtaek City. Methods : The evaluation of environmental noise level, questionnaire survey, and health examination were performed for 917 residents. The study population consisted of four groups: subjects who lived in the village close to the fighter airbase (high exposure), subjects who lived along the course of fighters (intermediate exposure), and subjects near a helicopter airbase, and the control group. Results : The prevalence of the aircraft noise related accident and irritable bowel syndrome in the exposure groups were higher than that of the control group. The risks of noise induced hearing loss, hypertension and diabetes mellitus were higher in the exposed groups than in the control group. The prevalence of anxiety disorder and primary insomnia were higher in the exposed groups than in the control group. Prevalence odd ratios of the risk for primary insomnia after adjusting age, sex, agricultural noise, and occupation were 4.03 [95% confidence interval (95% Cl) 1.56-10.47] for the subject near the helicopter airbase, 1.23 (95% Cl 0.40-3.76) for those intermediately exposed to fighter noise, and 4.99 (95% Cl 2.14-11.64) for those highly exposed to fighter noise. Conclusions : The results of the present study suggest that the aircraft noise may have adverse effects on hearing function, cardiovascular health and mental health. Therefore, it seems to be needed to take proper measures including the control of the aircraft noise and the management of the exposed people's health.

감마선 조사와 푸코이단/라미나린 병용처리가 돈육 패티의 품질에 미치는 영향

김현주,최종일,박진규,송범석,김재훈,윤요한,김천제,신미혜,변명우,이주운,Kim, Hyun-Joo,Choi, Jong-Il,Park, Jin-Gyu,Song, Beom-Seok,Kim, Jae-Hun,Yoon, Yo-Han,Kim, Cheon-Jei,Shin, Mee-Hye,Byun, Myung-Woo,Lee, Ju-Woon 한국축산식품학회 2009 한국축산식품학회지 Vol.29 No.1

The objective of this study was investigated to apply the fucoidan and laminarin extract from low-grade Undaria pinnatifida to real food product, a pork patty. Pork patties added with fucoidan and laminarin showed lower lipid oxidation and the inhibition against lipid oxidation was shown to be dependent on the irradiation doses. The Hunter color values of pork patty added with fucoidan increased significantly with an increase of irradiation dose. The hardness profiles of the patties with fucoidan and laminarin was decreased, but the amount of water in the patties was increased. Also, the combination of gamma irradiation and addition of fucoidan and laminarin was shown to be effective for the microbiological control. These results suggested that gamma irradiation and fucoidan and laminarin treatment showed the positive effect on microbial stability and quality of the pork patty.

안전성 향상을 위해 감마선 조사한 시판 플레인 요구르트의 품질 특성

김현주,송현파,함준상,이주운,김기혁,조철훈,Kim, Hyun-Joo,Song, Hyun-Pa,Ham, Jun-Sang,Lee, Ju-Woon,Kim, Kee-Hyuk,Jo, Cheor-Un 한국축산식품학회 2008 한국축산식품학회지 Vol.28 No.5

To develop a yogurt for sensitive consumer such as infants, children or immuno-compromised patients using gamma irradiation, the effects of gamma irradiation on the microbiological, chemical, and sensory quality in a commercial plain yogurt were investigated. No viable coliform bacteria were detected in the sample and approximately a 6 decimal reduction was achieved in the number of total aerobic bacteria by irradiation at 5 kGy. The initial population of lactic acid bacteria observed in the commercial plain yogurt was 8.95 log CFU/g. Gamma irradiation significantly reduced the initial microbial level to 6.47 and 2.85 log CFU/g after irradiation at 1 and 3 kGy, respectively (p<0.05). However, irradiation dose up to 5 kGy could not completely eliminate the lactic acid bacteria in commercial plain yogurt. pH, color, lactose and lactic acid content, and sensory quality were not affected by irradiation treatment and storage. Our results suggest that irradiation can improve the microbial quality of commercial plain yogurt without impairing the physicochemical and sensory quality.

비우식성 치경부 병소와 5급 와동 수복물이 치주조직에 미치는 영향

김현주,김성조,최점일,이주연,Kim, Hyun-Joo,Kim, Seong-Jo,Choi, Jeom-Il,Lee, Ju-Youn 대한치주과학회 2009 Journal of Periodontal & Implant Science Vol.39 No.1

Purpose: The non-carious cervical lesion(NCCL) is a loss of tooth structure at the neck of affected teeth that is unrelated to tooth caries. The reported prevalence of NCCL varies from 5% to 85%. Prevalence and severity of lesions have been found to increase with age. They are becoming more significant as people live longer and become more aware of the importance of oral health. The purposes of this study were first, to examine the periodontal conditions associated with NCCL, and second, to investigate the clinical effects of class V restorations of NCCL on periodontal tissues. Materials and methods: The sample size was 982 teeth of 50 subjects(25 male, mean age $52{\pm}7$) who were seen at the Department of Periodontology, Pusan National University Hospital. At the baseline examination, clinical periodontal parameters were measured. After the initial examination, 24 patients who were absent from hypersensitivity were selected. The teeth with NCCL were randomly divided into the test and control groups. The teeth in the test group were restored with flowable resin; the control teeth were not restored. Six months later, the clinical examinations were repeated. The data were analyzed using the SPSS program. Results: The results were as follows: 1) NCCL occurred on 45.8% of examined teeth. The percentage of affected teeth was higher in maxillary and premolar teeth. 2) The shallow saucer type was the most common. 3) Teeth with NCCL had more gingival recession, lower attachment level, and higher incidences of bleeding on probing(BOP) and plaque than NCCL-free teeth. 4) Six months later, gingival recession, attachment level, the percentages of BOP and plaque in the test group were lower than in the control group(p<0.05). Conclusion: NCCLs were more found in maxillary teeth, especially in premolar teeth. The results suggest that the restoration of NCCL could affect some periodontal parameters favorably.

Semliki Forest Virus 감염은 뉴우런의 탈수초를 유발한다

김현주,사영희,홍성갑,Kim, Hyun Joo,Sa, Young-Hee,Hong, Seong-Karp 한국정보통신학회 2017 한국정보통신학회논문지 Vol.21 No.6

척수신경절의 신경 세포와 슈반세포의 공동 배양으로 수초화 형성 세포 집단이 제조되었다. 슈반세포와 뉴런 세포가 쥐의 배아의 척수신경절로 부터 각각 in vitro에서 분리되었다. 배양된 슈반세포와 뉴런 세포는 동일한 평판접시에서 공동배양 되었다. 본 실험과정은 다음과 같은 4 단계로 구성되어 있다 : 첫 번째 단계는 배아의 척수 신경절 세포의 현탁 과정, 두 번째 단계는 안티 mitotic cocktail의 추가 과정, 세 번째 단계는 척수신경절 세포의 정제 과정, 및 네 번째 단계는 척추 신경절 세포에 슈반 세포의 추가 과정이다. 이들 세포들은 때 수초화가 진행되었다. 이렇게 수초화된 공동 배양은 Semliki forest virus에 의해 감염되었고 그 때 탈수초화 과정을 유발시켰다. 우리는 수초화된 뉴런에 존재하는 peripheral myelin protein 22의 항체를 이용하여 수초화 과정과 탈수초화 과정을 확인하였다. We constructed a population of myelinated cells with co-culture of neuronal cells and Schwann cells from DRG. Schwann cells and neuronal cells were isolated from dorsal root ganglion (DRG) in embryos of rat in vitro respectively. The cultured Schwann cells and cultured neuronal cells, respectively were co-cultured in a same plate. This procedure contains following four steps: first step of suspension of the embryonic dorsal root ganglion cells, second step of addition of anti-mitoticcocktail, third step of purification of dorsal root cells, and fourth step of addition of Schwann cells to dorsal root ganglion cells. These cells were performed accomplishment of myelination. This myelinated co-culture system was infected by Semliki forest virus and then induced demyelination processing in this myelinated co-culture. We identified myelination and demyelination processing using antibody of peripheral myelin protein 22 (PMP 22) meaning presence of myelinated neuron.

Additional use of autogenous periosteal barrier membrane combined with regenerative therapy in the interproximal intrabony defects: case series

김현주,김형민,이주연,Kim, Hyun-Joo,Kim, Hyung-min,Lee, Ju-Youn Korean Academy of Stomatognathic Function and Occl 2017 구강회복응용과학지 Vol.33 No.3

치간부 골내낭의 치주재생치료는 수술 후 발생할 수 있는 비심미성 때문에 치과의사에게 힘든 과제이다. 본 연구에서는 이러한 문제점을 해결하기 위해 치간부 골내낭의 bovine bone mineral과 enamel matrix derivative (EMD)를 이용한 재생 수술에 골막을 포함한 결합조직 이식을 동반한 임상증례를 소개하고자 한다. 임상적 및 방사선학적인 검사는 술 전과 수술 6개월 이후 시행하였다. 모든 임상 지표들이 개선되었고, 방사선학적 검사에서 골내낭이 감소함을 확인할 수 있었다. 또한, 부가적인 결합조직이식을 통해 치간부 연조직의 증대 및 형태 개선으로 인한 심미성이 증진되는 효과도 확인할 수 있었다. Regenerative therapy in an interproximal intrabony defect is a challenge due to unaesthetic appearance after surgery. In this article, we introduce a case series of additional use of autogenous periosteal barrier membrane combined with bovine bone mineral and enamel matrix derivative (EMD) in interproximal periodontal intrabony defects to overcome an aforementioned shortcoming. During the periodontal regenerative surgery, autogenous periosteal membrane was additionally adopted besides xenograft material and EMD. Clinical and radiographic examinations were performed before surgery and 6 months after surgical treatment. All clinical parameters were improved and the intrabony defects were resolved on the radiography 6 months after surgery. Moreover, soft tissue esthetics such as the contour of interdental papilla was better than that of conventional regenerative therapy. Periodontal regenerative therapy using several graft materials and bioactive materials was effective in the treatment of periodontal intrabony defect. Moreover, using of autogenous periosteal barrier membrane combined with xenograft and EMD has additional effect for the treatment of an interproximal intrabony defect in terms of augmentation of interdental soft tissue volume.

LDPE 광분해 반응의 속도 상수 결정

김현주,정일현,홍인권,이재동 ( Hyoun Joo Kim,Il Hyun Jung,In Kwon Hong,Jae Dong Lee ) 한국공업화학회 1994 공업화학 Vol.5 No.4

254㎚ 이상의 파장을 갖는 자외선 램프가 설치된 광조사장치를 이용하여 상용성 저밀도 폴리에틸렌을 100시간 동안 광분해시켰다. 20여 단계가 넘는 복잡한 광분해 반응단계 중에서 필름의 물성을 크게 저하시키는 중요 3단계로 정하고 간단하게 변수를 정의하여 반응 모델식을 설정하였으며, IR 스펙트럼을 이용하여 광분해 과정중에 생성되는 과산화물과 카르보닐기의 흡광도를 시간의 함수로 해석하여 각 단계에서의 속도상수와 활성화 에너지를 구하였다. 이들 자료로부터 논란이 되고 있는 반응 메카니즘을 정리할 수 있었으며 속도 결정 단계를 정하였다. The LDPE films were photolyzed for 100 hours in UV apparatus with 400-W medium pressure mercury lamp radiating wavelengths longer than 254㎚. A simple kinetic model was introduced and was applied to interpret the FT-IR absorbance of carbonyl and hydroperoxide bonds as a function of UV exposure time. From these data, the reaction mechanism and the rate determining step of photodegradation were determined.

u-방재 City 기본방향 연구

김현주,박영진,이원성,연경환,Kim. Hyun-Joo,Park. Young-Jin,Lee. Won-Sung,Yeon. Kyung-Hwan 한국방재학회 2008 한국방재학회 학술발표대회논문집 Vol.2008 No.1

This study demonstrates a basic concept and designing direction for the realisation of disaster prevention planning in u-City(u-BangjaeCity) that is from establishing a planning system in terms of the areas of professional disaster and safety management for the national disaster management. and designing disaster or safety management system via using ubiquitous technology for the scientific disaster management. In order to realise u-City it is necessary to maps out interrelation amongst various services such as traffic, environment and disaster prevention. Domestic and international case studies regarding the tendency of disaster prevention planing in u-City and its analysis could be the fundamental resource in order to develop the standard model of u-BangjaeCity.

취반방법에 따른 혼합잡곡밥의 품질 및 이화학 특성

김현주,이지혜,이병원,이유영,이병규,전용희,고지연,우관식,Kim, Hyun-Joo,Lee, Ji Hae,Lee, Byong Won,Lee, Yu Young,Lee, Byoung Kyu,Jeon, Yong Hee,Ko, Jee Yeon,Woo, Koan Sik 한국식품영양학회 2018 韓國食品營養學會誌 Vol.31 No.5

This study evaluated the quality characteristics, the presence of polyphenolic compounds, and radical scavenging activity of rice cooked along with various mixed grains (barley, black soybean, adzuki beans, foxtail millet, proso millet, sorghum, glutinous rice) by following two different cooking methods (normal and pressure cooker). The amylogram and water characteristics of mixed grains showed significant differences based on the presence of different types of mixed grains. The chromaticity, palatability characteristics, presence of phenol compounds, and radical scavenging activity of rice cooked along with different mixed grains showed significant differences according to the nature of mixed grains. Total polyphenol contents of before cooking, cooked-rice added to mixed grains cooked in the normal cooker and a pressure cooker were 4.46~5.16, 0.58~0.93 and 0.65~0.96 mg GAE/g, and total flavonoid contents were 250.74~548.89, 129.26~207.04 and $127.41{\sim}218.15{\mu}g\;CE/g$, respectively. The DPPH radical scavenging activity of before cooking, cooked-rice added to mixed grains cooked in the normal cooker and a pressure cooker was 79.25~181.61, 22.07~53.64 and 7.51~39.97 mg TE/100 g, and ABTS radical scavenging activity was 203.25~328.24, 47.28~84.94 and 58.27~99.51 mg TE/100 g, respectively. Accordingly, it is necessary to different combinations of mixed grains according to the cooking method at home and grain industry.