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성기혜 ( Ki Hye Sung ),김민희 ( Min Hee Kim ),김은령 ( Eun Ryoung Kim ),심재원 ( Jae Won Shim ),이정주 ( Jung Ju Lee ),임재우 ( Jae Woo Im ),진현승 ( Hyun Seung Jin ) 대한주산의학회 2009 Perinatology Vol.20 No.3
목적: 최근 극소 저출생 체중아의 생존율의 개선으로 기관지폐 이형성증(bronchopulmonary dysplasia, BPD)이 늘고 있다. 다기관 연구에 의해 전국적인 BPD의 역학, 임상 양상과 각 병원 간의 차이를 조사하여 향후 우리나라의 BPD 감소와 중증도를 줄이는 것을 목적으로 본 연구를 시행하였다. 방법: 2005년 6월부터 2007년 5월까지 건국대학교병원, 영등포 성애병원, 강북삼성병원, 중앙대학교병원, 건양대학교병원, 강릉아산병원의 신생아 집중 치료실에 입원하였던 신생아 4,476명을 대상으로 하였다. BPD의 진단 기준은 비전형적인 BPD를 포함하여 병인적인 분류를 하고 있는 Ogawa 등의 분류법을 이용하여 신생아 호흡 곤란 증후군(respiratory distress syndrome, RDS)과 전형적 또는 미만성 혼탁의 방사선 소견, 산전 감염의 유무에 따라 6가지 type으로 분류하였다. 또한 전체 신생아의 출생체중 분포와 생존율, 각 출생체중 군별 BPD의 발생률, 병태 비율, 사망률 등을 조사하고, 이 후 재택 산소요법 시행 여부와 미숙아 망막증, 괴사성 장염 등의 합병증 여부를 조사하였다. 결과: 생후 28일째 산소 치료가 필요한 신생아는 89명이었고, 이 중 Ogawa 분류법에 의한 BPD 환아는 70명(1.6%)이었으며, 특히 1,500 g 미만의 환아 237명 중 60명(25.3%)이었다. 생후 28일 이상 생존율은 98.7%이고, 사망 예는 없었으며 평균 재원 기간은 97.8±51.2일(43~405일)이었다. BPD는 900~999 g, 1,000~1,249 g의 체중 군에서 발생률이 각각 15명(21.4%)으로 가장 높았으며, 교정 36주 이후에도 산소투여가 필요한 중증 BPD의 경우 900~999 g의 체중 군에서 7명(23.3%)로 가장 높았다. Ogawa 분류법으로 BPD의 각 병태 비율로는 RDS 이후에 나타나는 I, II형이 각각 전체의 17예(24.3%), 44예(62.9%)로 대다수를 차지하였다. 이외에도 III`형은 2예(2.9%), IV형은 2예(2.9%), V형은 5예(7.1%)이었고, III형, VI형은 없었다. 재택 산소요법은 8예에서 시행되어 전체의 11.4%였으며, 이 중 BPD I형이 7예로 87.5%를 차지하였다. 미숙아 망막증은 35명(50.0%)에서 발생하였으며, 700 g 이하 신생아에서 9예(26.5%)로 가장 많았다. 또한 괴사성 장염은 3명(4.3%)이었다. 결론: 본 연구는 국내에서 처음으로 진행된 BPD의 전국적인 다기관 역학 조사로, 대상 신생아의 Ogawa 분류에 의한 BPD 유병률은 1.6% 이었고 1,500 g 미만 신생아의 25.3%이었으며, 전체 신생아의 BPD 70명 중 Ogawa 분류의 I, II형이 각각 24.3%, 62.9%로 대다수를 차지하였다. Purpose: As the neonatal intensive care advanced, the incidence of neonatal bronchopulmonary dysplasia (BPD) has increased. We conducted a multi-center investigation of the prevalence of BPD in six hospitals to investigate the epidemiology of BPD in Korea. Methods: Retrospective reviews ware performed for survival rate, prevalence of BPD of total 4,476 newborn infants who were admitted to neonatal intensive care unit in Konkuk university hospital, Sung-Ae General hospital, Kangbuk Samsung hospital, Chung-Ang university hospital, Konyang university hospital, and Gangneung Asan hospital between June, 2005 and May, 2007. By Ogawa, BPD was defined as oxygen dependency at 28 days after birth, with respiratory distress symptoms and the change of chest x-ray finding, and classified as 6 subtypes. Classic BPD was defined as oxygen dependency at 36 weeks of postmenstrual age. Results: Survival rate at 28 day after birth was 98.7%. BPD infants by Ogawa classification were 70 (1.6% of overall newborn infants), classic BPD infants were 30 (0.7%). Especially, among 237 preterm infants with birth weight less than 1,500 gram who survived to 28 days of life, 60 (25.3%) had BPD by Ogawa classification and 23 (9.7%) had classic BPD. In Ogawa classification, infants with RDS as type I and II, were 17 infants (24.3%) and 44 infants (62.9%). Home oxygen therapy was performed 8 infants (11.4%). Prevalence of retinopathy of prematurity was 35 infants (50.0%), necrotizing enterocolitis was 3 infants (4.3%), and intraventricular hemorrhage was 6 infants (8.6%). Conclusion: Prevalence of BPD infants was 1.6% of overall newborn, 25.3% of preterm infants with birth weight less than 1,500 gram. Among 70 BPD infants, BPD by Ogawa classification with history of RDS as type I and II were 24.3%, 62.9% as the majority of BPD. This study would be the first report of epidemiology of Korean BPD infants by multi-center study.
High-precision white light interferometry based on a color CCD and peak matching algorithm
Im Jaeseung,Kim Hyuntae,Park Woongkyu,Ahn Jae Sung,Lee Byeongil,Choi Soobong 한국물리학회 2022 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.80 No.7
White light interferometry (WLI) is a widely used technique in various research fields because it can quickly measure the topography of a sample over a large area. In conventional WLI, the topography of the sample is generally obtained by using the envelope of the interferogram. However, this method cannot determine the precise order of the fringes because it is very sensitive to longitudinal chromatic aberration which may cause several measurement errors. Here, we propose an algorithm for avoiding errors in the measurement of the sample’s topography. The concept of the peak matching algorithm and the development of a new scheme of acquiring the topography of the sample by using a color charge-coupled device (CCD) is proposed. We demonstrate that our method can reject the fringe distortion problem encountered when using a conventional WLI system to measure the discrete sample surface. We expect our method to be applied to a variety of research and in industrial fields that require precise topographic measurements.
Effects of Leucosporidium Ice-binding Protein on the Cryopreservation of Boar Sperm
Sang Hyoun Park,Keon Bong Oh,Sun-A Ock,Sung June Byun,Hwi-Cheul Lee,Hyeon Yang,Seongsoo Hwang,Gi-Sun Im,Jae-Seok Woo 한국동물생명공학회(구 한국동물번식학회) 2018 발생공학 국제심포지엄 및 학술대회 Vol.2018 No.06
This study was performed to evaluate effects of Leucosporidium ice-binding protein (LeIBP) supplementation on boar (Duroc) sperm freezing. The collected semen was diluted (1.5×10⁸ /mL) in lactose egg yolk (LEY) and cooled at 5°C for 3 h. The cooled semen was then diluted (1×10⁸ /mL) in LeIBP containing LEY with 9% glycerol and maintained at 5°C for 30 min. The semen was divided into six experimental groups (control, 0.001, 0.005, 0.01, 0.05, and 0.1 mg/mL of LeIBP). The straws were stayed above the liquid nitrogen (LN2) vapors for 20 minutes and then plunged into LN2. After thawing, sperm parameters such as motility, viability, and acrosome integrity, intracellular reactive oxygen species (ROS), apoptosis, and undetected lipid peroxidation were determined. Computer assisted sperm analysis was used for sperm parameters and flowcytometry was performed to acrosome integrity (FITC-PSA/PI), ROS (DCFHDA/ PI), lipid peroxidation (BODIPY C11/PI), and apoptosis (Annexin V/PI), respectively. The differences were not in sperm motility, but in viability of 0.05 and 0.1 mg/mL groups compared to control (p<0.05). Higher acrosome integrity was observed in LeIBP groups compared to control (p<0.05), except for 0.001 group. Both ROS and lipid peroxidation level were lower in all LeIBP groups than that of control (p<0.05). Furthermore, lower apoptosis rate was observed in both 0.005 and 0.1 LeIBP groups compared to control (p<0.05). It can be postulated that a supplementation of LeIBP in boar sperm freezing extender is an effective method to increase the sperm qualities after cryopreservation.
Characterisation of the major carotenoids in the plasma of the Eurasian magpie (Pica pica) nestlings
Sang-im Lee,Min Jung Baek,Jae Chun Choe,Piotr G. Jablonski 한국조류학회II 2017 한국조류학회지 Vol.24 No.1
Since carotenoids can serve as antioxidants and/or immune stimulants, it has been assumed that deposition of carotenoids in feathers or bills can reveal the health status in birds. In order to study the function of carotenoids as signals or immune stimulants, it is necessary to characterise the types of carotenoid molecules in the study species. In this preliminary study, we examined the types of carotenoids in the plasma of four nestlings of the Eurasian magpie (Pica pica) using mass spectrometry. We found that lutein or zeaxanthin is the major carotenoid in the plasma of magpie nestlings. Some minor constituents of carotenoids could be regarded as the metabolized forms of lutein or zeaxanthin. The plasma of magpie nestlings contained both yellow carotenoids such as lutein and zeaxanthin and red carotenoids such as astaxanthin, which may result in the varying degrees of redness in the plasma among the individuals.