강원도 석탄 폐광지 주변 폐석더미에서 복토와 식생기반재 처리가 소나무(Pinus densiflora Siebold & Zucc.) 와 참싸리 (Lespedeza cyrtobottrya Miq.)의 경쟁에 미치는 영향

이궁 ( Koong Yi ),임주훈 ( Joo Hoon Lim ),김정환 ( Jeong Hwan Kim ),이임균 ( Im Kyub Lee ),정용호 ( Yong Ho Jeong ) 한국환경복원기술학회 2013 한국환경복원기술학회지 Vol.16 No.1

This study was conducted to evaluate the effect of soil covering depth and vegetation base materials on the competition between Pinus densiflora Siebold & Zucc. and Lespedeza cyrtobotrya Miq., which were grown in an abandoned coal mine land for three years after seeding, by comparing their growth and stein density. The study site was consisted of sub-plots with four different soil covering depths (0cm, 10cm, 20cm, and 30cm) and four different compounds of vegetation base materials (peat moss (control), soil conditioner+peat moss (S+P), erosion control material+peat moss (E+P), and soil conditioner+erosion control material+peat moss (S+E+P)). Results of this study showed opposite pattern between P. densiflora and L. cyrtobotrya with different soil covering depth and compounds of vegetation base materials in general. P. densiflora showed the highest growth and stem density in plots with 10cm and 0cm depths of soil covering, respectively, while the lowest was shown in plots with 20cm depth of soil covering. In contrast, L cyriobotrya showed the highest growth and stem density in plots with 20cm depth of soil covering, while the loweSt was shown in plots with 0cm depth of soil covering. In case of vegetation base materials, P. densflora showed the highest growth and stem density in control plots and plots treated with S+P, respectively, while the lowest was shown in plots with S+E+P treatment. On the other hand, L cyrtobotrva showed the highest growth and stem density in plots treated with S+E+P, while the lowest was shown in control plots. These results suggested the competition between two plants as a major cause of opposite patterns, which is induced by the suppressed growth and stem density of P. densiflora by fast growing L cyrtobotrya. Despite the suppression of L cyrtobotrya on P. densiflora, L. cyrtobotrya can play a positive role in improving soil quality, and thus it would be more desirable for restoring abandoned coal mine land to manage the growth of L cyrtobotrya periodically, rather than eliminate them.

Antibacterial Effects of Tea Tree Oil and Mastic Oil to Streptococcus mutans

Song-Yi Yang,So-Hyun Lee,On-Bi Park,Hee-Rang An,Yeong-Hyeon Yu,Eun-Bi Hong,Kyung-Hee Kang,Hwa-Soo Koong 한국치위생과학회 2023 치위생과학회지 Vol.23 No.1

Background: Tea tree oil has antiviral, antimicrobial and antifungal effects and Mastic oil has antifungal and anticancer effects. For synergistic effects of oils, blending oil containing a mixture of two to three oils is recommended. This study aimed to determine the antibacterial effects of Tea tree oil, Mastic oil, and Blending oil containing the two oils in a mixture, to verify and suggest the potential use of these oils as a substance to prevent dental caries.Methods: Tea tree oil, Mastic oil, and Blending oil with a 1:1 blend of the two oils were diluted in liquid medium to 0% (negative control), 0.5%, 1.0%, and 2.0%. Streptococcus mutans was applied to each experimental group of the three diluted oils and after 8 h culture, the optical density (OD) was measured and the growth inhibition rate for S. mutans was estimated.Results: Tea tree oil had significantly low OD values across all concentrations (p<0.05) without significant variation among different concentrations (p>0.05). Mastic oil did not significantly vary in OD compared to the negative control across all concentrations (p>0.05) without significant variation among different concentrations (p>0.05). Blending oil, compared to the negative control, did not significantly vary in OD at 0.5% (p>0.05) but significant variation was found as the concentration increased (p<0.05). Additionally, for Tea tree oil and Mastic oil, the growth inhibition rate showed no significant variation according to concentration (p>0.05), whereas for Blending oil, the growth inhibition rate for S. mutans showed a significant difference at 1.0% (p<0.05) and at higher concentrations. Conclusion: Blending oil containing a Tea tree oil and Mastic oil demonstrated a significant growth inhibition effect on S. mutans from the concentration of 1.0%, which suggested its potential use as an effective antibacterial agent for dental caries.

대한갑상선학회 갑상선결절 및 암 진료 권고안 개정안

이가희 ( Ka Hee Yi ),박영주 ( Young Joo Park ),궁성수 ( Sung-soo Koong ),김정한 ( Jung-han Kim ),나동규 ( Dong Gyu Na ),류진숙 ( Jin-sook Ryu ),박소연 ( So Yeon Park ),박인애 ( In Ae Park ),백정환 ( Chung-hwan Baek ),송영기 ( Youn 대한갑상선학회 2010 International Journal of Thyroidology Vol.3 No.2

장애인 치과진료에 대한 치과위생사의 인식과 교육 필요성

Young-Joo Seo,Song-Yi Yang,Hwa-Soo Koong,Sang-Hwan Oh 대한치과의료관리학회 2023 대한치과의료관리학회지 Vol.11 No.1

This study surveyed and analyzed attitudes toward people with disabilities, awareness of considerations in dental treatment for individuals with disabilities, the need for education on dental treatment for people with disabilities, and the educational requirements for dental hygienists working in dental medical institutions. The study was conducted to highlight the importance of dental treatment education for people with disabilities and to provide foundational data for future dental treatment education programs targeting dental hygienists. A total of 221 dental hygienists working in dental care institutions nationwide participated in a self-administered online questionnaire from November 2 to 15, 2022. This study concludes that there is a significant correlation between the attitudes of dental hygienists toward the disabled, their recognition of considerations in dental treatment for the disabled, the need for education on dental treatment for the disabled, and their educational experience in providing dental treatment for the disabled. In order to improve these factors, it is important to implement and expand systematic dental care education for people with disabilities in the school curriculum, as well as in supplementary education and seminars.

PET/CT 검사에서 추가 검사 시 수분섭취에 따른 ¹⁸F-FDG의 신장 섭취 감소에 대한 고찰

이이랑,김상규,함준철,남궁혁,임한상,김재삼,Lee, Yi Lang,Kim, Sang Gyu,Ham, Jun Chul,Nam-Koong, Hyuk,Lim, Han Sang,Kim, Jae Sam 대한핵의학기술학회 2016 핵의학 기술 Vol.20 No.1

FDG를 이용한 PET/CT 검사에서 FDG의 대부분이 비뇨기계를 통해 배설된다. FDG가 신장에 저류될 경우 판독 성능이 저하된다. PET-CT 검사에서 FDG의 신장 저류로 인해 추가 검사가 필요한 경우 이뇨제 사용 없이 쉬운 방법인 수분 섭취를 이용해 배설을 촉진할 수 있는 방법을 선택하는 데 도움을 주고자 한다. 11개월간 세브란스병원에서 PET-CT 검사를 시행한 환자 중 신장에 질환이 없고 기능이 정상인 환자 총 80명을 대상으로 하였다. 두 집단으로 구분하였고, 각 40명씩 구성하였다. (1) Torso 검사가 끝난 후 수분 섭취 없이 30분 동안 휴식만 취한 집단, (2) 30분 전 물 500 cc를 한 번에 섭취한 후 휴식을 취한 집단으로 나눴다. 영상분석은 SUV 측정과 Blind test, 두 가지로 하였다. SUV 측정은 양쪽 신장의 SUVmax와 근육과 지방의 SUVmax을 VOI 를 설정하여 측정하였고 간의 SUVmean을 ROI를 설정하여 측정하였다. 검증 후에 p < 0.05 인 경우를 통계적으로 유의하다고 판단하였다. Blind test는 Torso 검사와 추가 검사의 영상을 비교하여 신장 방사능 배설정도를 4등급으로 점수를 나타내어 분류 및 기록하였다. SUV 측정 결과 수분 미섭취 군의 신장 SUV 값은 6.8% 증가하였고, 수분 섭취 군의 SUV의 값은 49.7% 감소하였다(p < 0.001). Blind test에서 수분 미섭취 군의 평균은 17.25점이었고, 수분섭취 군의 평균은 34.75점으로 더 높은 점수를 나타냈다. Purpose By ingestion of 18F-FDG of kidney of PET/CT during the inspection, if additional examination is required, depending on whether you want to water intake, we want to confirm a change in the rate of decrease of F-18 FDG of the kidney. Materials and Methods The 80 patients without kidney disease were performed PET/CT examination. Device was analyzed after setting the kidney to a three-dimensional region of interest. In patients require additional examination, and inspection after 30 minutes, a PET/CT torso examination after the water of the 500 cc ingested at a time. After the addition of both water intake group and no hydration group of kidney of SUV, it was compared with PET/CT torso scan. Results High and low of the kidney SUV did not show a significant difference in the rate of decrease. Reduction rates of background (BKG) of additional examination was 2.8% and reduction rates of SUV was 49.7% (Hydration) : -6.8% (No hydration), so did show a significant difference. In the image blind test, the average point score of hydration and no hydration was 34.25 : 17.25. Conclusion An undercurrent of 18F-FDG in the kidney at the time of torso examination, it was confirmed that the reduction rate after the addition of water intake is high. It is considered that can be expected to improve the quality of an image due to a decrease in elongation through the kidneys examination with additional fluid intake as needed intake.

해외 산림토양탄소모델 분석을 통한 한국형 모델 개발방안 연구

이아름 ( An Reum Lee ),이궁 ( Koong Yi ),손요환 ( Yow Han Son ),김래현 ( Rae Hyun Kim ),김춘식 ( Choon Sig Kim ),박관수 ( Gwan Soo Park ),이경학 ( Kyeong Hak Lee ),이명종 ( Myong Jong Yi ) 한국산림과학회 2010 한국산림과학회지 Vol.99 No.6

Forest soil carbon model is a useful tool for understanding complex soil carbon cycle in forests and estimating dynamics of soil carbon to climate change. However, studies on development and application of the model are insufficient in Korea. The need for development of Korean model is now growing, because there are notable problems and limitations for adapting overseas models in Korea to meet the requirements of the international organizations such as IPCC, which demands highly reliable data for national reports. Therefore, we have studied 7 overseas forest soil carbon models (CBM-CFS3, CENTURY, Forest-DNDC, ROMUL, RothC, Sim-CYCLE, YASSO), analyzed and compared their structure, decomposition mechanism, initializing process and, input and output data. Then we evaluated applicability of these models in Korea with three criteria; availability of input data, performance of model, and possibility of regional modification. Finally, a systematic process for applying a new model was suggested based on these analyses.

학술상 : 학술상 (생식내분비학)

( Hwa Seon Koo ),( Hyun Jeong Yi ),( Min Young Lee ),( Min Hye Choi ),( Na Young Sung ),( Yu Im Hwang ),( In Ok Song ),( Mi Kyoung Koong ),( Inn Soo Kang ),( Kwang Moon Yang ) 대한산부인과학회 2012 대한산부인과학회 학술대회 Vol.99 No.-

Objective: To evaluate whether increased peripheral blood inflammatory immune cell can induce decrease of uterine blood flow in patients with unexplained recurrent spontaneous abortion (RSA). Methods: This study designed prospectively 33 pregnant women between 5 to 7 gestational weeks with a history of unexplained RSA included in this study. 47 normal pregnant women between 5 to 7 gestational weeks without history of infertility and/or RSA included as a control. Peripheral blood natural killer (pbNK) (CD3-/56+) fractions among peripheral blood monocyte (PBMC) were checked by flow cytometry. Uterine color-pulsed Doppler trans-vaginal ultrasound for evaluation of uterine radial artery RI was checked. Uterine radial artery resistance index (RI) compared between study and control group. After then, uterine radial artery RI was compared between high pbNK cell fraction above 12.1% among PBMC and normal pbNK cells fraction below 12.1%. Correlation between pbNK cell fraction to uterine radial artery RI was also evaluated. Results: Uterine radial artery RI in early pregnancy was significantly higher in patients with RSA than that of normal control (0.60 ± 0.14 vs. 0.54 ± 0.12, P = 0.039). Especially, the mean value of uterine radial artery RI in RSA patients with elevated pbNK cells was significantly increased than that of normal control (0.62 ± 0.13 vs. 0.54 ± 0.12, P =0.029). Otherwise, pbNK cell fractions among PBMC displayed strong positive correlation to uterine radial artery RI (Pearson`s correlation coefficient P=0.001, r = 0.667). Conclusion: Increased pbNK cells can evoke decreased uterine blood flow by their pro-inflammatory action on micro vascular structure such as uterine radial artery. This can be a one causative mechanism of inducing spontaneous abortion by increased NK cells. But, larger scaled study is needed for clarify our results.

원인불명의 습관성 유산 환자에서 말초혈액 자연살해세포의 증가가 임신초기 자궁혈류의 변화에 미치는 영향

구화선 ( Hwa Seon Koo ),이현정 ( Hyun Jeong Yi ),이민영 ( Min Young Lee ),안현숙 ( Hyun Suk Ahn ),최민혜 ( Min Hye Choi ),성나영 ( Na Young Sung ),황유임 ( Yu Im Hwang ),송인옥 ( In Ok Song ),궁미경 ( Mi Kyoung Koong ),강인수 ( In 대한산부인과학회 2012 Obstetrics & Gynecology Science Vol.55 No.7

목적: 원인불명의 습관성 유산 환자에서 말초혈액 중 비정상적 비율로 증가된 자연살해세포가 자궁으로의 혈류를 감소시키는지에 대해 알아보고자 하였다. 연구방법: 본 연구는 전향적 연구로, 습관성 유산의 기왕력을 갖는 임신 5-7주 사이의 환자 33명을 대상으로 하였으며 습관성 유산의 기왕력이 없는 정상 임신 5-7주 47명을 대조군으로 하였고, 습관성 유산군은 말초혈액 자연살해세포 비율 12.1%를 기준으로 정상(normal) natural killer (NK) group과 증가(elevated) NK group으로 나누어 연구를 진행하였다. 임신 5-7주 사이에 측정한 말초혈액에서 유세포분석기를 이용하여 말초혈액 자연살해세포 분획 및 세포용해 활성도를 측정 후 그 결과를 비교 분석하였고 질식초음파의 Doppler를 이용하여 자궁방 사동맥의 저항을 측정 후 각 군에서 비교하였다. 또한 말초혈액 자연살해세포분획과 자궁방사동맥 저항지수 간의 연관성을 알아보았다. 결과: 자궁방사동맥의 평균 저항지수는 대조군에 비교하여 습관성 유산 환자군에서 통계학적으로 의미 있게 높았고(0.60 ± 0.14 vs. 0.54 ± 0.12, P = 0.039), 말초혈액 자연살해세포의 분획이 12.1% 이상 증가(elevated NK)군에서도 정상대조군에 비해 통계학적으로 유의하게 높게 나타났다(0.62 ± 0.13 vs. 0.54 ± 0.12, P = 0.029). 또한 전체 습관성 유산 환자에서 말초혈액 자연살해세포의 비율과 자궁방사동맥 저항지수 사이에는 양의 상관관계가 나타났고(P = 0.013, r = 0.429), 특히 습관성 유산 환자중 증가(elevated) NK군에서는 더욱 강한양의 상관관계를 보였다(P = 0.001, r=0.667). 결론 증가된 말초혈액의 자연살해세포는 자궁방사동맥과 같은 미세 혈관에 향염증 반응을 일으켜 자궁으로의 혈류를 감소시켜 습관성 유산을 야기한다고 설명할 수 있겠다. 하지만 본 연구의 결론을 확인하기 위해서는 더 큰 규모의 연구뿐 아니라 분자생물학적 기전에 대한 연구도 필요할 것으로 생각된다. Objective: To evaluate whether increased peripheral blood inflammatory immune cell can induce decrease of uterine blood flow in patients with unexplained recurrent spontaneous abortion (RSA). Methods: This study designed prospectively 33 pregnant women between 5 to 7 gestational weeks with a history of unexplained RSA included in this study. 47 normal pregnant women between 5 to 7 gestational weeks without history of infertility and/or RSA included as a control. Peripheral blood natural killer (pbNK) (CD3-/56+) fractions among peripheral blood monocyte (PBMC) were checked by flow cytometry. Uterine color-pulsed Doppler trans-vaginal ultrasound for evaluation of uterine radial artery RI was checked. Uterine radial artery resistance index (RI) compared between study and control group. After then, uterine radial artery RI was compared between high pbNK cell fraction above 12.1% among PBMC and normal pbNK cells fraction below 12.1%, Correlation between pbNK cell fraction to uterine radial artery RI was also evaluated, Results: Uterine radial artery RI in early pregnancy was significantly higher in patients with RSA than that of normal control (0.60 ± 0.14 vs. 0.54 ± 0.12, P = 0.039). Especially, the mean value of uterine radial artery RI in RSA patients with elevated pbNK cells was significantly increased than that of normal control (0.62 ± 0.13 vs. 0.54 ± 0.12, P=0.029). Otherwise, pbNK cell fractions among PBMC displayed strong positive correlation to uterine radial artery RI (Pearson`s correlation coefficient P=0.001, r = 0.667). Conclusion: Increased pbNK cells can evoke decreased uterine blood flow by their pro-inflammatory action on micro vascular structure such as uterine radial artery. This can be a one causative mechanism of inducing spontaneous abortion by increased NK cells. But, larger scaled study is needed for clarify our results.

운동장애성 소화불량증 환자에서 위배출 시간과 위전도검사

이문우,이정아,정성한,최원준,김진아,채희복,박선미,윤세진,궁성수 大韓消化器病學會 1998 大韓消化器病學會誌 Vol.32 No.5

硏究論文 : 폐석더미에서 복토 및 식생기반재 처리가 참싸리( Lespedeza cyrtobotrya Miq.)의 생장에 미치는 영향

김정환 ( Jeong Hwan Kim ),임주훈 ( Joo Hoon Lim ),이궁 ( Koong Yi ),이임균 ( Im Kyun Lee ),정용호 ( Yong Ho Jeong ) 한국환경복원기술학회(구 한국환경복원녹화기술학회) 2012 한국환경복원기술학회지 Vol.15 No.6

This study was conducted to evaluate the effects of soil covering and vegetation base materials implementation on the growth of Lespedeza cyrtobotrya Miq. in abandoned coal mine land. We compared the biomass of L. cyrtobotrya at the study plots of four different soil covering depth (control, 10cm, 20cm, and 30cm) and four different compounds of vegetation base materials composed of soil conditioner (S), erosion control (E), and peat moss (P) (control, S+P, E+P, and S+E+P). The result showed that the biomass of L. cyrtobotrya was higher in the study plots implemented with soil covering than control plot, although the increase in biomass was not constant with soil covering depth. In case of the vegetation base materials treatments, the biomass was highest in S+E+P plot, and S+P and E+P plots showed higher biomass than control plot.