중량식 라이시미터에서 콩 재배시 물관리 방법에 의한 양분의 용탈과 작물 흡수

이예진,한경화,이슬비,성좌경,송요성,이덕배,Lee, Ye-Jin,Han, Kyung-Hwa,Lee, Seul-Bi,Sung, Jwa-Kyung,Song, Yo-Sung,Lee, Deog-Bae 한국환경농학회 2017 한국환경농학회지 Vol.36 No.3

본 연구는 기상 조건 및 관개 여부가 양분용탈 및 콩의 양분 흡수에 영향을 미치는지 평가하기 위하여 중량식 라이시미터에서 2015년부터 2016년까지 콩을 재배한 결과를 제시하였다. 콩 재배기간인 6월부터 10월까지의 증발산량은 무관개구의 경우 강우에 따라 변동되었으며, 2016년 7월 중순부터 8월 말까지 지온상승 및 강우 빈도의 감소로 증발산량이 감소하다가 9월 중순 강우에 의해 유효수분 함량을 회복하여 생육 후기에 증발산량이 증가하였다. 질산태질소의 지하 용탈량은 2016년 7월 초 5일간 강우가 지속되었을 때 가장 많았으며, 그동안 지하배수가 거의 없었던 무관개구에서 더 높게 나타났다. 개화기 및 착협기인 7월 중순부터 8월까지 한발로 인하여 무관개구의 토양 수분함량은 7월 초의 50% 수준으로 유지되었으며, 콩 수량은 적습관개구의 25% 수준이었다. 적습관개구와 무관개구의 양분 흡수량을 비교한 결과 질소 흡수량이 적습관개구에서 20~50% 더 높았으며, 인산, 칼리 흡수량 차이는 미미하였다. 토양 수분함량은 콩의 질소 흡수에 영향을 미치며, 적정 수량을 생산하기 위해서는 관개를 통한 적정 수분 공급이 필수적이었다. BACKGROUND: Soil water content strongly depends on weather condition and irrigation, and it could influence on crop nutrient use efficiency. This study was performed to assess nutrient uptake of soybean by soil water condition. METHODS AND RESULTS: In this study, nutrient leaching and crop uptake as affacted by water management practice was investigated using weighing lysimeter which is located in National institute of agricultural science, Wanju, Jeonbuk province from June 2015 to October 2016. Water supply for soybean (cv. Daewon) was managed with irrigation and rainfall. Nitrate leaching was greatest in the rainfall treatment at early July 2016. Yield of soybean in the rainfall treatment was only 25% compared to the irrigation due to the drought at flowering and podding period. The uptake of nitrogen was considerably reduced by drought whereas the uptake of phosphorus and potassium was less affected by drought. CONCLUSION: It was proven that nitrogen loss and uptake were dependent on soil water condition. Therefore, irrigation water management to maintain available soil moisture capacity is critical to nitrogen uptake and yield of soybean.

Evaluation of the Marginal and Internal Fit of Temporary Dental Resins According to Slice Thickness of DLP Printer

이예진,Chung-Jae Lee 대한예방치과학회 2023 International Journal of Clinical Preventive Denti Vol.19 No.1

Objective: To evaluate the marginal and internal fitness of temporary dental resin according to the slice thickness of Digital Light Processing (DLP) 3D printers, considering the rapid spread and use of dental 3D printers. Methods: The temporary dental resin specimens were classified into five groups according to the slice thickness of the DLP 3D printer: 0.01 mm, 0.025 mm, 0.075 mm, 0.1 mm, and 0.15 mm, with ten specimens in each group, amounting to a total of 50 specimens. The scanned data of the silicone impressions obtained from the scanner were evaluated for fitness in the marginal, axial, and cuspal regions using a CAD program. Results: The mean values of the descriptive statistics of the gaps by slice thickness for DLP 3D printers showed the highest gaps in the 0.15 mm group, and relatively low gaps in the 0.01 mm group. When examined by site, the lingual cusp had the highest spacing, while the lingual margin had relatively low spacing. Significant differences were found by slice thickness (p<0.001) and by measurement site (p<0.001). There was a significant combined effect of Slice Thickness and Site (p=0.001). Conclusion: Based on the above results, the temporary dental restorative resins produced by DLP 3D printers show higher fitness with thinner slice thickness and all of them are in the clinically acceptable range (<120 μm), suggesting they can be sufficiently used for making temporary dental restorative resins.

The effect of metformin on culture conversion in tuberculosis patients with diabetes mellitus

이예진,Sung Koo Han,Ju Hee Park,Jung Kyu Lee,Deog Keom Kim,Hee Soon Chung,Eun Young Heo 대한내과학회 2018 The Korean Journal of Internal Medicine Vol.33 No.5

Background/Aims: Patients with diabetes mellitus (DM) and tuberculosis (TB) have increased morbidity and a high risk of treatment failure or recurrence. It is important to manage both diseases simultaneously. Among anti-diabetic drugs, metformin inhibits intracellular growth of mycobacteria. Therefore, we examined the effects of metformin on TB treatment, especially in patients with DM. Methods: This retrospective cohort study included patients with culture-positive pulmonary TB diagnosed between 2011 and 2012. The primary study outcome was sputum culture conversion after 2 months of treatment. Results: Of 499 patients diagnosed with culture-positive pulmonary TB, 105 (21%) had DM at diagnosis. Among them, 62 (59.5%) were treated with metformin. Baseline characteristics, except for the presence of chronic renal disease, were not significantly different between the metformin and non-metformin groups. Metformin treatment had no significant effect on sputum culture conversion (p = 0.60) and recurrence within 1 year after TB treatment completion (p = 0.39). However, metformin improved the sputum culture conversion rate in patients with cavitary pulmonary TB, who have higher bacterial loads (odds ratio, 10.8; 95% confidence interval, 1.22 to 95.63). Conclusions: Among cavitary pulmonary TB patients with DM, metformin can be an effective adjunctive anti-TB agent to improve sputum culture conversion after 2 months of treatment.

메타버스의 수업활용에 관한 사용자 경험 분석 - 스페이셜(Spatial)을 중심으로 -

이예진,정광태,Lee, Yejin,Jung, Kwang-Tae 한국실천공학교육학회 2022 실천공학교육논문지 Vol.14 No.2

In this study, the user experience was analyzed from the learner's point of view, focusing on the metaverse platform 'Spatial'. SUS(System Usability Scale) was used to evaluate the usability of the metaverse platform 'Spatial' in a college class, and the Magnitude estimation technique was used to evaluate the immersion and satisfaction with the class. In addition, a questionnaire survey was used to collect user experience opinions on the use of 'Spatial' as a teaching tool. Looking at the usability evaluation results of the 'Spatial' system, the students evaluated the usability, immersion, and satisfaction quite positively. Looking at the user experience of metaverse platform 'Spatial', it was found that students highly valued Metaverse as an educational tool that can provide a place for many people to gather and communicate even in a non-face-to-face space. Compared to other online platforms, metaverse has advantages in ease of use, interaction, immersion, and interest. In particular, in addition to keyboard, touch, and display, interaction using the five senses such as voice, motion, and gaze was recognized as a great advantage. On the other hand, it was found that high openness, freedom, and interest factors can both promote learning and inhibit learning. Nevertheless, it is judged that the metaverse platform 'Spatial' can be effectively applied in college classes because it enables various interactions between instructor and learner or between learner and learner.

F-45 Changes of exhaled volatile organic compounds during recovery from acute exacerbation of chronic obstructive pulmonary disease

이예진 ( Yeon Joo Lee ),( Sang Hoon Lee ),( Jong Sun Park ),( Young-jae Cho ),( Jae Ho Lee ),( Choon-taek Lee ),( Ho Il Yoon ) 대한결핵 및 호흡기학회 2016 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.121 No.-

Background and objectives: Acute exacerbation of chronic obstructive pulmonary disease (COPD) is a well known risk factor for increased mortality and decline in lung function. Spirometry has limitation in reflecting airway inflammation during recov-ery phase of the acute exacerbation of COPD. We aimed to find biomarkers of exhaled volatile organic compounds (VOCs) of the patients suffering from acute exacerbation of COPD. Methods: A Prospective panel study was performed from May 2016 to September 2016 in Seoul National University Bundang Hospital (SNUBH) respiratory clinic.We enrolled patients with COPD having acute exacerbations. Breath samples were col-lected at baseline, 1 week and 4 weeks later. Breath was collected into Tenax tubes with Bio-VOCTM breath sampler and ambient air was also collected each time to eliminate the influence of external contamination. The exhaled VOCs of samples were assayed by gas chromatography - mass spectrometry (GC-MS). Analyses were conducted by linear mixed-effects model. Results: Five patients participated in the study; all of them were male and ex-smokers. Mean age was 73.4 and their mean percent predicted FEV1 was (67.6±10.6)%. Four of VOCs; allyl methyl sulfide, dimethyl sulfide, 2-methylfuran, methyl propyl sulfide were raised and three of VOCs; E-1-methylsulfanyl-1-propene, 3-methylthiophene, 1-propanol fell significantly dur-ing recovery from exacerbation of COPD. Conclusions: Our study showed that seven VOCs may qualify as candidate biomarkers for detecting and monitoring ex-acerbation of COPD.

노지 대파 관비 재배 시 비료 종류와 양분 공급비율에 따른 수량 및 비료이용효율

이예진(Yejin Lee),송요성(Yosung Song),이슬비(Seulbi Lee),이찬욱(Chanwook Lee),현병근(Byungkeun Hyun) 한국토양비료학회 2021 한국토양비료학회 학술발표회 초록집 Vol.2021 No.11

물과 비료를 동시에 공급하는 관비재배는 물과 비료를 각각 주는 방식에 비해 작물의 물과 비료 이용효율이 높고, 비료주는 노력을 절감할 수 있다. 대부분 강우의 영향이 없는 시설재배지에서 관비 재배방법을 이용하고 있으나, 외부 환경 제어가 어려운 노지 재배지는 기후변화에 따른 국지적 가뭄 등에 취약하기 때문에 상시 물과 양분 공급이 가능한 관비재배 시설의 도입을 검토할 필요가 있다. 본 연구에서는 웃거름으로 여러 번 비료 공급이 필요한 노지재배 대파에 대한 관비공급 방법을 설정하고자 밑거름 비료 종류와 관비 공급 비율에 따른 수량 및 양분흡수에 따른 비료이용효율을 평가하였다. 충북 괴산의 농가 포장에서 4월 23일 정식하여 8월 6일 수확하였으며, 시험구는 20m² 씩 2반복으로 처리하고 각각 3반복 시료채취하여 분석하였다. 비료량은 토양검정 비료추천량을 기준으로 하였고, 밑거름은 무기질비료, 유기질비료, 퇴비를 처리하였으며, 유기질비료와 퇴비는 질소함량을 기준으로 처리하였다. 웃거름은 기존 비료사용처방의 웃거름 비율인 질소 60%, 칼리 40%와 웃거름 비율을 높인 질소 70%, 칼리 60%, 질소와 칼리 모두 80% 웃거름 공급으로 처리하였다. 웃거름은 관비를 통해 2주 간격으로 공급하였으며, 수분은 –33kPa을 기준으로 공급하였다. 밑거름 종류별 대파 수확량은 무기질비료 > 퇴비 > 유기질비료 순이었으며, 웃거름 비율별 대파 수확량은 질소 70%, 칼리 60%에서 가장 많았으나, 모두 통계적으로 유의한 차이는 없었다. 질소 흡수량은 밑거름 비율이 높을수록 많았으며, 질소 이용효율 또한 밑거름 비율이 많은 처리에서 높았다. 작물 생육량에 따라 양분공급량을 조절하기 위해서는 웃거름 비율이 높은 것이 용이 하나, 노지 특성 상 재배 중간 강우가 있을 경우 양분을 공급하기 곤란한 경우가 있다. 또한 토양 수분과 강우에 의한 비료의 희석효과도 있어 웃거름 비율이 높은 처리구의 질소 흡수량이 낮은 경향을 보인 것으로 추측된다. 본 연구결과를 통해 작물 수확량과 비료 이용효율을 모두 고려했을 때 밑거름 종류와 상관없이 대파 관비 재배 시 웃거름 공급비율은 질소 70%, 칼리 60%가 적정할 것으로 판단된다.

고추 질소 흡수량 평가를 위한 작물 생육모델 적용

이예진(Ye-Jin Lee),성좌경(Jwa-Kyung Sung),이슬비(Seul-Bi Lee),김양민(Yang-Min Kim),송요성(Yo-Sung Song),이덕배(Deog-Bae Lee) 한국토양비료학회 2018 한국토양비료학회 학술발표회 초록집 Vol.2018 No.5

피부레이저 인식 및 치료현황에 대한 설문조사

이예진 ( Ye Jin Lee ),이상형 ( Sang Hyung Lee ),최지호 ( Jee Ho Choi ),박천욱 ( Chun Wook Park ),박영립 ( Young Lip Park ),김유찬 ( You Chan Kim ),조상현 ( Sang Hyun Cho ),이동윤 ( Dong Youn Lee ),강훈 ( Hoon Kang ),손상욱 ( Sang 대한피부과학회 2017 대한피부과학회지 Vol.55 No.1

Background: Skin laser treatment has improved significantly and has become an effective treatment approach for many skin diseases while also having applications for beauty treatments. However, since skin laser transfers energy directly to the skin, the misuse of such treatment may result in permanent damage to skin tissues. Objective: This survey of Korean adults, conducted to obtain their perspectives on and their treatment experience with skin laser treatment, will be used to determine the current status of skin laser treatment and to identify necessary changes to ensure proper and safe conduct of skin laser treatment. Methods: From April 5^th to April 12^th, 2016, a survey was conducted to obtain information regarding the perspectives and the treatment experience of adults aged 20∼59 years. Results: Approximately 50% of the participants had experience with skin laser treatment, and among these, 24.7% had not received treatment at a dermatology clinic. Compared to treatment at a dermatology clinic, the danger of side effects was 1.7 times higher at a non-dermatology clinic, 2 times higher at a skin care shop, and 5.3 times higher at an Oriental medical clinic. Among patients who received skin laser treatment, 16.1% experienced side effects, and among these, 1 out of 4 patients visited a non-dermatologist for treatment of these side effects. Conclusion: The results of the survey showed that in order for the public to receive safe and effective skin laser treatment based on professional diagnosis, there is a definitive need to provide correct information to the public and to implement changes to ensure proper understanding of skin laser treatment among this population. (Korean J Dermatol 2017;55(1):8∼19)

질소결핍 또는 과잉 처리된 토마토의 질소흡수, 아미노산 및 질소동화관련 유전자발현과 효소활성

이예진 ( Ye Jin Lee ),( Hari B. Krishnan ),이수연 ( Su Youn Lee ),이종식 ( Jong Sik Lee ),성좌경 ( Jwa Kyung Sung ) 한국토양비료학회 2012 한국토양비료학회 학술발표회 Vol.2012 No.-

밭토양 질소 추천을 위한 질소 무기화 평가

이예진(Ye-Jin Lee),성좌경(Jwa-Kyung Sung),이슬비(Seul-Bi Lee),김양민(Yang-Min Kim),송요성(Yo-Sung Song),이덕배(Deog-Bae Lee) 한국토양비료학회 2017 한국토양비료학회 학술발표회 초록집 Vol.2017 No.10