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Myung Hyun Cho,Ha Yeong Yoo,Byung Ok Kwak,박혜원,정소정,김수녕,손재성,김교순 대한소아신장학회 2015 Childhood kidney diseases Vol.19 No.2
Purpose: The aim of this study was to establish a simple formula to predict renal length in children using a Technesium-99m dimercaptosuccinic acid (DMSA) scan data, and to compare it with the formula derived from ultrasonography, which is widely accepted. Methods: Children who underwent a DMSA scan and ultrasonography were reviewed retrospectively, and those who had anatomical urinary tract abnormalities or urinary tract infections were excluded. Results: A total of 230 children (84 males and 146 females; age, 1 month to 16 years; mean age, 16.8 ± 27.4 months). Mean renal length measured by DMSA scan was longer than that by ultrasonography (6.38 ± 1.16 vs. 6.02 ± 1.14 cm; P < 0.001). Renal length was correlated with age, weight, height, and body surface area on the DMSA scan and ultrasonography, and showed the strongest positive correlation with height. The following formulae were established to predict renal length: mean renal length (cm) = 5.433 × height (m) + 2.330 (R2, 0.833) using the DMSA scan data, and mean renal length (cm) = 5.367 × height (m) + 2.027 (R2, 0.853) using ultrasonography data. Conclusion: We propose a simple height-based formula to predict renal length in children using a DMSA scan data, and validate it by comparing with ultrasonography formula.
Risk factors for specific methicillin-resistant Staphylococcus aureus clones in a Korean hospital
Cho, Dong Taek,Cha, Hwa Yun,Chang, Hyun-Ha,Kim, Shin-Woo,Chung, Jae Myung,Kim, Jungmin,Lee, Yoo Chul,Seol, Sung Yong,Lee, Je Chul Oxford University Press 2006 The Journal of antimicrobial chemotherapy Vol.57 No.6
<P><I>Objectives</I>: To analyse the risk factors for nosocomial methicillin-resistant <I>Staphylococcus aureus</I> (MRSA) infections caused by different clonal types.</P><P><I>Methods</I>: A total of 134 non-duplicate nosocomial MRSA isolates were analysed for clonal types by molecular typing techniques. The medical records of 90 patients who had documented MRSA infection were evaluated retrospectively.</P><P><I>Results</I>: Two predominant MRSA clones of sequence types (STs) ST239 (<I>n</I>=75) and ST5 (<I>n</I>=39) accounted for 85% of the isolates. Management of patients in the departments of orthopaedic surgery, neurosurgery and plastic surgery was identified as a risk factor for infection with MRSA of ST239, while the presence of intravascular catheters was a risk factor for infection with ST5. Pulmonary infection was significantly higher in the patients infected with ST239 strains than in the patients infected with ST5 strains (<I>P</I> < 0.05). The overall mean duration of antimicrobial therapy for the patients with ST239 infection was significantly more than that for the patients with ST5 infection (<I>P</I> < 0.05).</P><P><I>Conclusions</I>: ST239 and ST5 were the predominant MRSA clones in the study hospital. Risk factors were significantly different between ST239 and ST5 strains. The results of this study will be of use in designing larger prospective epidemiological studies for MRSA infection based on clonal types.</P>
Cho, Myung Hyun,Yoo, Ha Yeong,Kwak, Byung Ok,Park, Hye Won,Chung, Sochung,Kim, Soo Nyung,Son, Jae Sung,Kim, Kyo sun Korean Society of Pediatric Nephrology 2015 Childhood kidney diseases Vol.19 No.2
Purpose: The aim of this study was to establish a simple formula to predict renal length in children using a Technesium-99m dimercaptosuccinic acid (DMSA) scan data, and to compare it with the formula derived from ultrasonography, which is widely accepted. Methods: Children who underwent a DMSA scan and ultrasonography were reviewed retrospectively, and those who had anatomical urinary tract abnormalities or urinary tract infections were excluded. Results: A total of 230 children (84 males and 146 females; age, 1 month to 16 years; mean age, $16.8{\pm}27.4$ months). Mean renal length measured by DMSA scan was longer than that by ultrasonography ($6.38{\pm}1.16$ vs. $6.02{\pm}1.14cm$; P < 0.001). Renal length was correlated with age, weight, height, and body surface area on the DMSA scan and ultrasonography, and showed the strongest positive correlation with height. The following formulae were established to predict renal length: mean renal length (cm) = 5.433 ${\times}$ height (m) + 2.330 (R2, 0.833) using the DMSA scan data, and mean renal length (cm) = 5.367 ${\times}$ height (m) + 2.027 (R2, 0.853) using ultrasonography data. Conclusion: We propose a simple height-based formula to predict renal length in children using a DMSA scan data, and validate it by comparing with ultrasonography formula.
Ha, Jong-Hun,Lee, Dong-Hae,Park, Jin-Sik,Cho, Oh Hyun,Kim, Dong-Hoon,Ha, Na-Young,Cho, Nam-Hyuck,Hwang, Kyu Jam,Cho, Yong-Gon,Lee, Hye-Soo,Lee, Won Kil,Lee, Yoo Chul,Cho, Myung-Je,Lee, Woo-Kon,Shin, M The Korean Society for Microbiology 2016 Journal of Bacteriology and Virology Vol.46 No.4
Orientia tsutsugamushi (O. tsutsugamushi), which is endemic to an Asia-Pacific region, has increased its incidence and caused annually around 10 thousand patients infected with scrub typhus in Korea in the past several years. In the present study, we isolated 44 O. tsutsugamushi from the patients with febrile illness accompanied with or without an eschar in Gyeongsangnam-do, Korea. These isolates were characterized by genetic analysis of the major outer membrane protein, the 56-kDa type-specific antigen (tsa56), which is unique to O. tsutsugamushi. Two types of sequences of tsa56, designated by JJ1 and JJ2, were determined from 37 and 7 isolates of the 44 isolates, respectively. JJ1 and JJ2 showed 74.7~90.8% identity in nucleotide sequence and 66.1~90.5% identity in amino acid sequence with 33 reference strains except for Boryong and Kuroki. JJ1 and JJ2 had 100 and 99.9% nucleotide identity to Boryong strain, and 99.9 and 99.8 % to Kuroki, which has been known to be similar to Boryong, respectively. In addition, they showed 77.9~ 81.4% nucleotide identity with the cluster of Gilliam-related genotypes, whereas they showed higher nucleotide identity (89.6~90.8%) with the cluster of Karp-related genotypes. To our knowledge, this is the first report to isolate O. tsutsugamushi and characterize their genotype as the Boryong in Jinju and West Gyeongsangnam-do, Korea, even though it has been reported that the Boryong was the predominant genotype in isolates from chiggers, domestic rodents, and patients in the southern part of Korea. Furthermore, our isolates could be useful source to study on the pathophysiology and epidemiology of scrub typhus in Korea.
High resolution metabolomics to determines the risk associated with bisphenol A exposure in humans
Cho, Seongha,Khan, Adnan,Jee, Sun Ha,Lee, Hee-Seok,Hwang, Myung-Sil,Koo, Yong Eui,Park, Youngja H. Elsevier 2018 Environmental toxicology and pharmacology Vol.58 No.-
<P><B>Abstract</B></P> <P>Although high BPA exposure has been correlated with several metabolic diseases, the underlying mechanisms are unclear. In the present study, a metabolomics approach was used to explore the metabolic variations caused by low or high BPA exposure in female (n = 96) and male (n = 98) urine. Fatty acid elongation and sphingolipid metabolism were affected by high BPA exposure in males and females. Fatty acid elongation and sphingolipid metabolism were further investigated among age groups consisted of 30–39 yrs old, 40–49 yrs old, and 50–59 yrs old males and females with high or low urinary BPA. High BPA-exposed males in 30 s and females in 40 s were found with significant disturbance in fatty acid elongation and sphingolipid metabolism, respectively. Additionally, females in 40 s showed elevated inflammatory metabolites: 6-ketoprostaglandin E1 and thromboxane. In the present study, we have demonstrated that environmental metabolomics is useful to elucidate the health effects of BPA exposure.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Increased long-chain fatty acid synthesis in the high BPA-exposed male group. </LI> <LI> Decreased sphingolipid metabolism in the high BPA-exposed female group. </LI> <LI> BPA induced gender and age specific metabolic alteration. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Graphene–Carbon–Metal Composite Film for a Flexible Heat Sink
Cho, Hyunjin,Rho, Hokyun,Kim, Jun Hee,Chae, Su-Hyeong,Pham, Thang Viet,Seo, Tae Hoon,Kim, Hak Yong,Ha, Jun-Seok,Kim, Hwan Chul,Lee, Sang Hyun,Kim, Myung Jong American Chemical Society 2017 ACS APPLIED MATERIALS & INTERFACES Vol.9 No.46
<P>The heat generated from electronic devices such as light emitting diodes (LEDs), batteries, and highly integrated transistors is one of the major causes obstructing the improvement of their performance and reliability. Herein, we report a comprehensive method to dissipate the generated heat to a vast area by using the new type of graphene carbon metal composite film as a heat sink. The unique porous graphene-carbon-metal composite film that consists of an electrospun carbon nanofiber with arc-graphene (Arc-G) fillers and an electrochemically deposited copper (Cu) layer showed not only high electrical and thermal conductivity but also high mechanical stability. Accordingly, superior thermal management of LED devices to that of conventional Cu plates and excellent resistance stability during the repeated 10 000 bending cycles has been achieved. The heat dissipation of LEDs has been enhanced by the high heat conduction in the composite film, heat convection in the air flow, and thermal radiation at low temperature in the porous carbon structure. This result reveals that the graphene carbon metal composite film is one of the most promising materials for modern electronics.</P>
Changes in the Residual Chlorine Content of Fresh-cut Lettuce during Storage
Cho, Sun-Duk,Chang, Min-Sun,Lee, Yu-Si,Ha, Ji-Hyoung,Kim, Gun-Hee,Bae, Dong-Ho,Kim, Yong-Soo,Chung, Myung-Sub,Kim, Yong-Mu,Lee, Dong-Ho,Park, Sun-Hee,Ha, Sang-Do The Korean Society for Applied Biological Chemistr 2010 Applied Biological Chemistry (Appl Biol Chem) Vol.53 No.3
Efficacies of the amounts and methods for chlorinated water to use in disinfection of lettuce were investigated. Concentrations of total and free chlorine in lettuce samples were measured using a colorimetric reaction with diethyl-p-phenylenediamine (DPD). For measurement of the total amount of residual chlorine remaining on samples of lettuce during storage, 100 mg/L DPD samples were used. The residual chlorine content decreased an initial amount of 14 mg/L and further decreased by 42.9% after three minutes, by 92.9% after ten minutes, and diminished to 4 mg/L after seven hours of storage. Measurements made while applying 200 mg/L chlorinated water showed a similar trend. The change in the amount of free available chlorine in the washing water was determined based on storage period and frequency. While washing, the amount of free available chlorine decreased proportionally with time.
Cho, Hanna,Baek, Min Seok,Choi, Jae Yong,Lee, Seung Ha,Kim, Joong Seok,Ryu, Young Hoon,Lee, Myung Sik,Lyoo, Chul Hyoung Ovid Technologies (Wolters Kluwer) - American Acad 2017 Neurology Vol.89 No.11
<B>Objective:</B><P>To investigate tau distribution in patients with corticobasal syndrome (CBS) using <SUP>18</SUP>F-AV-1451 PET.</P><B>Methods:</B><P>Six consecutively recruited patients with CBS and 20 age-matched healthy controls underwent 2 PET scans with <SUP>18</SUP>F-AV-1451 (for tau) and <SUP>18</SUP>F-florbetaben (for β-amyloid). We compared standardized uptake value ratio maps of the <SUP>18</SUP>F-AV-1451 PET images between the patients with CBS and controls.</P><B>Results:</B><P>Compared to controls, patients with CBS exhibited asymmetrically increased <SUP>18</SUP>F-AV-1451 binding in the putamen, globus pallidus, and thalamus contralateral to the clinically more affected side and in the ipsilateral globus pallidus and dentate nucleus. Voxel-based comparison additionally showed asymmetrically increased <SUP>18</SUP>F-AV-1451 binding in the focal regions of the precentral gray and white matter and in the midbrain, predominantly in the contralateral side. <SUP>18</SUP>F-AV-1451 binding in the precentral white matter correlated with motor severity.</P><B>Conclusions:</B><P><SUP>18</SUP>F-AV-1451 asymmetrically binds to motor-related subcortical gray and white matter structures in patients with CBS. This pattern corresponds to tau pathology distribution in postmortem studies, and motor deficit in patients with CBS may be associated with tau accumulation predominantly in the subcortical white matter underlying the motor cortex, leading to disruptions in motor-related networks.</P>