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Ryu, Jae Ryun,Kim, June Hoan,Cho, Hyo Min,Jo, Youhwa,Lee, Boram,Joo, Sunghoon,Chae, Uikyu,Nam, Yoonkey,Cho, Il-Joo,Sun, Woong The Royal Society of Chemistry 2019 Lab on a chip Vol.19 No.2
<P>Neurons reach their correct targets by directional outgrowth of axons, which is mediated by attractive or repulsive cues. Growing axons occasionally cross a field of repulsive cues and stop at intermediate targets on the journey to their final destination. However, it is not well-understood how individual growth cones make decisions, and pass through repulsive territory to reach their permissive target regions. We developed a microcontact printing culture system that could trap individual axonal tips in a permissive dot area surrounded by the repulsive signal, semaphorin 3F (Sema3F). Axons of rat hippocampal neurons on the Sema3F/PLL dot array extended in the checkboard pattern with a significantly slow growth rate. The detailed analysis of the behaviors of axonal growth cones revealed the <I>saccadic</I> dynamics in the dot array system. The trapped axonal tips in the permissive area underwent growth cone enlargement with remarkably spiky filopodia, promoting their escape from the Sema3F constraints with straight extension of axons. This structured axonal growth on the dot pattern was disrupted by increased inter-dot distance, or perturbing intracellular signaling machineries. These data indicate that axons grow against repulsive signals by jumping over the repulsive cues, depending on contact signals and intracellular milieu. Our study suggests that our dot array culture system can be used as a screening system to easily and efficiently evaluate ECM or small molecule inhibitors interfering growth cone dynamics leading to controlling axonal growth.</P>
ABELIAN PROPERTY CONCERNING FACTORIZATION MODULO RADICALS
Chae, Dong Hyeon,Choi, Jeong Min,Kim, Dong Hyun,Kim, Jae Eui,Kim, Jae Min,Kim, Tae Hyeong,Lee, Ji Young,Lee, Yang,Lee, You Sun,Noh, Jin Hwan,Ryu, Sung Ju The Kangwon-Kyungki Mathematical Society 2016 한국수학논문집 Vol.24 No.4
In this note we describe some classes of rings in relation to Abelian property of factorizations by nilradicals and Jacobson radical. The ring theoretical structures are investigated for various sorts of such factor rings which occur in the process.
( Min Jeong Oh ),( Geum Joon Cho ),( Hai Joong Kim ),( Chae Seung Lim ),( Hyun Kyong Ahn ),( Hyun Mee Ryu ),( Mi Hye Park ),( Kyo Hoon Park ),( Jong Chul Shin ) 대한산부인과학회 2012 대한산부인과학회 학술대회 Vol.99 No.-
To investigate the seroprevalence of hepatitis virus B (HBV) in pregnant women and possible risk factors for perinatal vertical transmission. This is a prospective, multicenter study of pregnant women and their paired neonates. Two thousand ninety pregnant women were evaluated by test for serum HBsAg using commercial enzyme immunoassay kits and HBV DNA analysis using MagicplexTM HepaTrio Real-time PCR method. Cord blood from pregnant women who were positive for HBsAg and/or HBV DNA was evaluated by HBV DNA analysis. Vertical transmission of HBV was defined as presence of HBV DNA in cord blood. Of 2,090 women studied, 3.2% and 5.4% tested positive for HBsAg and HBV DNA, respectively. Of HBsAg positive pregnant women, 93.4% were positive for HBV DNA. Otherwise, of HBV DNA positive pregnant women, only 55.3% were positive for HBsAg. Of HBsAg or HBV DNA positive pregnant women, overall rate of vertical transmission was 12.1%. Vertical transmission was found in 22.0% of cord bloods from pregnant women who were positive for both HBsAg and HBV DNA. However, no vertical transmission was found in cord bloods from pregnant women who were positive for HBsAg or HBV DNA. Prevalence of HBV in pregnant women was found to be 3.2% and 5.4% tested positive for HBsAg and HBV DNA, respectively. The rate of vertical transmission was 12.1% among HBsAg or HBV DNA positive pregnant women. HBV DNA positivity was associated with a higher chance of vertical transmission. HBV DNA test can be considered clinically to predict the vertical transmission in pregnant women with HBsAg.
An Effect of Water Vapor on Sulfur Dioxide Removal Property of Potassium-Based Dry Sorbents
Chae Ho Jin(채호진),Lee Soo Chool(이수출),Cho Min Sun(조민선),Jo Seong Bin(조성빈),Kim Tae Young(김태영),Lee Chul Ho(이철호),Kim Hyun Ji(김현지),Ryu Min Young(류민영),Kim Jae Chang(김재창) 한국에너지기후변화학회 2018 한국에너지기후변화학회 학술대회 Vol.2018 No.11
Clinical Approaches to Vascular Anomalies of the Lip
Ryu, Jeong Yeop,Lee, Joon Seok,Lee, Jeong Woo,Choi, Kang Young,Yang, Jung Dug,Cho, Byung Chae,Lee, Seok-Jong,Lee, Jong Min,Huh, Seung,Chung, Ho Yun Korean Society of Plastic and Reconstructive Surge 2015 Archives of Plastic Surgery Vol.42 No.6
Background The incidence of vascular anomalies in the head and neck is higher than in the extremities. It is especially common for vascular anomalies to involve the lip. The lips are a functionally and aesthetically important component of the head and neck area. A retrospective analysis of data from our vascular anomaly center was performed in order to understand the characteristics and treatment requirements of vascular anomalies of the lip and to establish which treatments are likely to lead to the best outcomes. Methods A retrospective review was performed of the medical records of patients diagnosed with vascular anomalies of the upper or lower lip from January 2001 to September 2013. Using clinical photographs, radiologic findings, and patient records, the diagnosis of each case and the location of the vascular anomaly were recorded, along with information about treatment and follow-up. Results A total of 1,606 patients were diagnosed with vascular anomalies over this time period, of whom 127 (7.9%) were found to have vascular anomalies in the lip only. Surgical treatment with or without embolization, sclerotherapy, laser therapy, medication only, and observation were the treatment strategies adopted in these cases. Conclusions Vascular anomalies of the lip should be diagnosed accurately. Radiologic diagnosis played a crucial role in treatment planning, and several techniques were used to treat vascular anomalies of the lip. When surgical excision is indicated for the correction of vascular anomalies of the lip, the aesthetic and functional characteristics of the lip should be considered.