[CA-0001] Genome of the world’s smallest flowering plant, Wolffia australiana, helps explain its specialized physiology and unique morpholog

Halim Park(Halim Park),Jin Hwa Park(Jin Hwa Park),Yejin Lee(Yejin Lee),Dong U Woo(Dong U Woo),Ho Hwi Jeon(Ho Hwi Jeon),Yeon Woo Sung(Yeon Woo Sung),Sangrea Shim(Sangrea Shim),Sang Hee Kim(Sang Hee Kim 한국육종학회 2022 한국육종학회 공동학술발표집 Vol.2022 No.-

Postpartum Gynetresia

( Yejin Park ),( Erang Im ) 대한주산의학회 2019 Perinatology Vol.30 No.1

Vaginal stenosis, or gynetresia, commonly results from a congenital defect, while acquired gynetresia is a rare condition. Reported contributors to acquired gynetresia include chronic graft-versus-host reaction, radiotherapy for gynecologic malignancies, female genital mutilation, postpartum foreign body insertion, or chemical insertion. We report a case of postpartum gynetresia, that was attributed to neither a foreign body nor chemicals. A 33-year-old Korean primigravid woman was referred to our hospital in hypovolemic shock due to postpartum bleeding caused by an actively bleeding vaginal laceration identified on pelvic examination. Primary repair of the vaginal laceration followed by embolization were performed. Four weeks later, postpartum gynetresia was identified on the pelvic examination. Adhesiolysis by blunt finger dissection was performed and a vaginal mold was inserted along with vaginal estrogen capsules. The vaginal mucosa was healed in four weeks.

Preeclampsia Increases the Incidence of Postpartum Cerebrovascular Disease in Korean Population

Park, Yejin,Cho, Geum Joon,Kim, Log Young,Lee, Tae-Seon,Oh, Min-Jeong,Kim, Young-Han KOREAN ACADEMY OF MEDICAL SCIENCE 2018 JOURNAL OF KOREAN MEDICAL SCIENCE Vol.33 No.6

<P><B>Background</B></P><P>Multiple studies have been reported regarding preeclampsia as a possible risk factor of cerebrovascular disease (CVD). However, the correlation of preeclampsia and CVD, whether it is a cause-effect relationship or they are sharing common predisposing condition, is not well understood. Therefore, the aim of this study was to investigate the association between the preeclampsia during pregnancy and development of postpartum CVD.</P><P><B>Methods</B></P><P>A total of 1,384,550 Korean women who had a delivery between January 1, 2010 and December 31, 2012, were enrolled. Women with the risk of CVD within 1 year prior to pregnancy were excluded based on the Charlson comorbidity index. Primary endpoint was the event of CVD within a year from delivery. After exclusion, 1,075,061 women were analyzed.</P><P><B>Results</B></P><P>During the follow-up of 1 year postpartum, there were 25,577 preeclampsia out of 1,072,041 women without postpartum CVD (2.39%), and 121 of 3,020 women with postpartum CVD had preeclampsia before delivery (4.01%). In multivariate logistic regression analysis, women who had preeclampsia during pregnancy showed a higher risk for postpartum CVD (odds ratio, 1.64; 95% confidence interval, 1.37–1.98).</P><P><B>Conclusion</B></P><P>The incidence of CVD after delivery was higher in women who had preeclampsia during pregnancy.</P>

Amine-Functionalized Mesoporous Zeolitic Imidazolate Frameworks-8 (ZIF-8) for CO₂ Cycloaddition Reaction with Epoxides under Atmospheric Pressure

Yejin Bae(배예진),A Ra Cho(조아라),Yunji Son(손윤지),Dong-Ho Lee(이동호),Young Cheol Park(박영철),Ho Bum Park(박호범),Yu-Ri Lee(이유리) 한국신재생에너지학회 2023 한국신재생에너지학회 학술대회논문집 Vol.2023 No.6

Clinical Significance of Emerging Eclampsia Distinct from Preeclampsia

( Yejin Park ),( Yun Ji Jung ),( Ja Young Kwon ),( Joonho Lee ),( Young-han Kim ) 대한산부인과학회 2018 대한산부인과학회 학술대회 Vol.104 No.-

Objective: Eclampsia refers to the development of new-onset seizures or coma in preeclampsia, as the severe end of its spectrum. The Objective of this study was to investigate clinical characteristics of emerging eclampsia on the spectrum of preeclampsia. Methods: 24 patients manifested eclamptic seizure between January 2007 and July 2018 were compared with 240 of preeclamptic patients in Severance Hospital. Clinical characteristics including maternal age, gestational age at delivery, systolic and diastolic blood pressure, gravidity, pre-pregnancy body mass index, and maternal complication such as HELLP syndrome (Hemolysis, Elevated Liver enzymes, Low Platelets), placental abruption, and neurologic sequelae were compared between eclampsia and preeclampsia followed by comparison of maternal laboratory findings. Moreover, clinical characteristics of eclampsia were analyzed depending on the onset time of eclamptic seizure-before and after labor. Results: Approximately 2.5% of eclampsia was emerged in preeclampsia. Eclamptic patients showed significantly younger (30.73.8 vs. 33.15.0, P=0.008), lower body mass index (20.733.54 vs. 22.604.44, P=0.046) and higher blood pressure (systolic: 178.4±22.0 vs. 151.3±2.0, P<0.0001; diastolic: 109.9±18.8 vs. 96.4±10.0, P<0.0001), especially during seizure episode. Furthermore, higher risks of HELLP syndrome and neurologic sequelae was accompanied with eclampsia (18.2% vs. 5.4%, P=0.043, 13% vs 0%, P<0.0001). Higher risk of eclampsia was accompanied with hyperuricemia (12.8% vs. 1.9%, P=0.001), despite no significant correlation with HELLP syndrome and placental abruption. Conclusion: Eclampsia had significant differences in clinical manifestation distinct from preeclampsia and our results suggested that higher serum uric acid level, higher risk of eclampsia. Moreover, physicians should concern the probability of eclampsia if high diastolic blood pressure continues after delivery.

Viscoelastic properties of a 3D-Printable high-dielectric paste with surface-modified BaTiO₃

Park, Jae Yun,Kang, Yi Young,Yoon, Hyun Woo,Park, No Kyun,Jo, Yejin,Jeong, Sunho,Won, Jong Chan,Kim, Yun Ho Elsevier 2018 Composites science and technology Vol.159 No.-

<P><B>Abstract</B></P> <P>In this study, a polystyrene-block-polyisoprene-block-polystyrene (SIS) based dielectric paste was fabricated using barium titanate (BT) as dielectric filler in order to produce organic-inorganic composites for 3D dispenser printing applications. Since a high loading of inorganic filler is generally required to obtain high dielectric properties, the surface of BT was modified with two different phosphonic acids having functional groups resembling the groups contained in the block copolymer, in order to achieve a high compatibility between the filler and the polymer matrix. Upon incorporation of 80 wt% of BT in SIS, the dielectric constant was found to be approximately 3 times higher than that of bare SIS. The surface modification of the filler enhanced its dispersion within the polymer matrix, as confirmed by the surface morphology of the composite film at a high filler content. The desired viscoelasticity was achieved through the fine-tuning of the total solid content, and consequently, the potential application of the composite as 3D printable paste was demonstrated through the formation of a layer-by-layer printed structure on a flexible substrate.</P>

직장 네트워크 데이터에 대한 통계적 ERGM 분석

Yejin Park,Jungmin Um,Subeen Hong,Yujin Han,김재희 한국통계학회 2022 응용통계연구 Vol.35 No.4

회사는 영리 등의 공동 목표를 달성하는 조직으로, 더 나은 성과를 도출해내기 위해 함께 노력하는 수많은 개인으로 구성된 사회 집단이다. 이에 따라 개인의 의사소통 능력을 비롯한 구성원 간의 네트워크 형성이 중요해지고 있다. 이러한 배경으로부터 본 연구는 직원 간 조언 관계 형성에 어떠한 요인이 영향을 미치는지 알아보고자 수행되었다. 이를 위해 미국과 유럽에 지사를 둔 컨설팅 회사 내 직원 44명의 네트워크 데이터를 ERGM (Exponential Random Graph Model) 방법으로 분석하였다. 분석 결과로 첫째, 연결을 비롯해 네트워크의 구조와 관련한 변수들이 유의하였다. 둘째, 서로 조언을 구할 확률에 성별 속성이 가장 큰 주효과로 나타났다. 셋째, 지역별 동질성은 성별 주효과보다 더 큰 연결 확률을 유도하였다. 이러한 결과로부터 직장 내 네트워크가 조금 더 효율적으로 활발하게 이루어질 수 있는 방법을 제시하였다.

Prenatally detected thoracic neuroblastoma

( Yejin Park ),( Hyun Jin Lee ),( Yun Ji Jung ),( Joon Ho Lee ),( Ja Young Kwon ),( Young-han Kim ) 대한산부인과학회 2018 Obstetrics & Gynecology Science Vol.61 No.2

Neuroblastoma is the most common pediatric extracranial solid tumor derived from primitive neural crest cells of the sympathetic nervous system. Although one-fifths of all neuroblastomas occurs within the thorax, thoracic neuroblastomas detected in fetus have been rarely reported. We report a case of fetal thoracic neuroblastoma with massive pleural effusion detected with prenatal ultrasonography. A 34-year-old Korean second-gravida was referred to our hospital at 30 weeks of gestation for evaluation, after the right lung mass found in the fetus. Approximately 3 cm, well-defined, hyperechoic mass was found in the right thorax with right pleural effusion, with the initial suspicion of teratoma. However, as mass continued to grow with deteriorating pleural effusion and fetal hydrops, the mass was considered malignant after 3 weeks. After a cesarean delivery, an approximately 4 cm mass with peripheral calcification and hemothorax was found on neonatal ultrasonography. Neuroblastoma was diagnosed on excision biopsy.

Comparison of recently developed toughening strategies for polylactic acid blends

Yejin Park,Jonghwi Lee 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.125 No.-

The biodegradability of plastics has become a primary requirement for society in the future and sustainableengineering technologies. Among the biodegradable polymers, polylactic acid (PLA) is currently thematerial of choice due to being relatively inexpensive and having good physical properties. However, itsmechanical properties still lag behind those of common synthetic polymers, and brittleness is one of themajor concerns for its applicability. Recently, many toughening strategies for PLA have been attempted,and a comparative analysis of them is urgently needed. In this review, we compare the most recent publicationsand intuitively uncover the key fundamental directions in this area. In particular, although asimple evaluation has many difficulties due to the different testing and processing methods used inthe studies, the impact strength, tensile strength, and modulus of PLA after various PLA-tougheningstrategies are compared in detail. The understanding of PLA-toughening strategies provided by thisreview could help the future development of biodegradable plastics in general.

A Model: Prediction of Small for Gestational Age Status and of the Diagnosis to Delivery Interval in Preeclampsia with Standard Parameters

( Yejin Park ),( Ja Young Kwon ),( Joon Ho Lee ),( Young Han Kim ) 대한산부인과학회 2016 대한산부인과학회 학술대회 Vol.102 No.-

Objective: To build a practical model that predicts the prognosis of preeclampsia based on information acquired at the time of diagnosis. Methods: We enrolled 401 patients who were diagnosed with preeclampsia and had delivered babies between January 2007 and March 2015. Preeclampsia progression was measured according to small for gestational age (SGA) status and the diagnosis to delivery interval (DDI). Prediction models were constructed by multiple logistic regression analyses using factors related to preeclampsia severity. Furthermore, we performed internal validation (n=200) with respect to discrimination. Results: SGA was independently associated with maternal pre-pregnancy body mass index (BMI) (odds ratio [OR]: 0.916, 95% confidence interval [CI]: 0.857-0.978), maternal hemoglobin at diagnosis (OR: 1.308, 95% CI: 1.135-1.508), and uterine artery notching on Doppler ultrasonography (OR: 3.186, 95% CI: 2.015-5.037). A prediction model derived from these variables showed an area under the curve (AUC) of 0.722 for SGA in the training cohort. When applied to the validation cohort, this model showed good discrimination (AUC: 0.717). DDI of more than one week was affected by maternal systolic blood pressure (OR: 0.984, 95% CI: 0.966-1.003), platelet counts (OR: 1.004, 95% CI: 1-1.008), aspartate transaminase (OR: 0.233, 95% CI: 0.054-1.003), and proteinuria (2+ OR: 0.648, 95% CI: 0.354-1.185; 3+ OR: 0.494, 95% CI: 0.245-0.997; 4+ OR: 0.176, 95% CI: 0.059- 0.529). The prediction model of a DDI of more than one week constructed using these variables produced an AUC of 0.694, and the validation cohort also demonstrated good discrimination (AUC: 0.669). Conclusion: Our prediction models that are derived from the factors measured at the time of diagnosis of preeclampsia can be used to estimate the sequelae of preeclamptic women and their fetuses.