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A review: methane capture by nanoporous carbon materials for automobiles
Pil-Seon Choi,Ji-Moon Jeong,Yong-Ki Choi,Myung-Seok Kim,Gi-Joo Shin,Soo-Jin Park 한국탄소학회 2016 Carbon Letters Vol.17 No.-
Global warming is considered one of the great challenges of the twenty-first century. In order to reduce the ever-increasing amount of methane (CH4) released into the atmosphere, and thus its impact on global climate change, CH4 storage technologies are attracting significant research interest. CH4 storage processes are attracting technological interest, and methane is being applied as an alternative fuel for vehicles. CH4 storage involves many technologies, among which, adsorption processes such as processes using porous adsorbents are regarded as an important green and economic technology. It is very important to develop highly efficient adsorbents to realize techno-economic systems for CH4 adsorption and storage. In this review, we summarize the nanomaterials being used for CH4 adsorption, which are divided into non-carbonaceous (e.g., zeolites, metal-organic frameworks, and porous polymers) and carbonaceous materials (e.g., activated carbons, ordered porous carbons, and activated carbon fibers), with a focus on recent research.
( Seon-pil Jin ),( Eun Kyung Choi ),( Sera Lee ),( Ji Su Lee ),( Jin Ho Chung ),( Soyun Cho ) 대한피부과학회 2016 대한피부과학회 학술발표대회집 Vol.68 No.2
<div style="display:none">fiogf49gjkf0d</div><div style="display:none">fiogf49gjkf0d</div><div style="display:none">fiogf49gjkf0d</div><div style="display:none">fiogf49gjkf0d</div><div style="display:none">fiogf49gjkf0d</div><div style="display:none">fiogf49gjkf0d</div><div style="display:none">fiogf49gjkf0d</div> Background: It is unclear if particulate matter (PM) 10 (PM < 10 μm in diameter) directly goes into the skin and what the molecular mechanism involves in response to PM10. Objectives: The objective was to see whether PM10 could penetrate into barrier-disrupted skin, produce reactive oxygen species (ROS), and elicit inflammatory response. Methods: We collected PM10 during a winter in Seoul and used cultured keratinocytes for in vitro study and tape-stripped BALB/c mice for in vivo study. Results: Keratinocyte cytotoxicity increased in a dose-dependent manner by PM10 treatment. IL-8, VEGF-A and MMP-1 mRNA expression and protein levels were significantly increased compared to control by qPCR and ELISA, respectively. Cellular ROS production was increased by PM10 treatment, and antioxidant N-acetyl cysteine pretreatment prevented induction of inflammatory cytokines IL--8, VEGF-A and MMP-1. In PM10-treated keratinocytes, electron-dense subcellular particles were observed by transmission electron microscopy. PM10 was observed inside hair follicles in both intact and barrier-disrupted skin in vivo. Additionally, intercellular penetration of PM10 was seen in barrier-disrupted skin. Repeated PM10 application induced epidermal thickening and deep dermal inflammation with mostly neutrophil infiltration. Conclusion: PM10 penetrates into skin and ultimately localizes within the cytoplasm of keratinocytes, causing ROS production and inflammation, demonstrating detrimental effects in the skin.
( Pil Soo Sung ),( Si Hyun Bae ),( Jeong Won Jang ),( Do Seon Song ),( Hee Yeon Kim ),( Sun Hong Yoo ),( Chung Hwa Park ),( Jung Hyun Kwon ),( Myeong Jun Song ),( Chan Ran You ),( Jong Young Choi ),( 대한간학회 2011 Clinical and Molecular Hepatology(대한간학회지) Vol.17 No.4
Background/Aims: Enhanced replication of hepatitis C virus (HCV) is well described in the setting of moderate to severe immunosuppression. The aims of this retrospective study were to determine the incidence of enhanced HCV replication in hepatocellular carcinoma (HCC) patients undergoing transarterial chemolipiodolization (TACL) and to identify the factors associated with enhanced replication of HCV. The clinical pattern of enhanced HCV replication was compared with hepatitis B virus (HBV) reactivation during TACL. Methods: This study enrolled 49 anti-HCV-seropositive patients who were diagnosed with HCC between January 2005 and December 2010 and who underwent TACL using epirubicin and/or cisplatin with consecutive HCV RNA copies checked. For comparison, 46 hepatitis B surface antigen1-positive patients with HCC who were treated with TACL were also enrolled. The frequency, associated factors, and clinical outcomes of enhanced HCV replication were analyzed and compared with those of HBV reactivation during TACL. Results: Enhanced replication of HCV occurred in 13 (26.5%) of the 49 anti-HCV-seropositive patients during TACL. Of these 13 patients, 4 developed hepatitis, but none of the subjects developed decompensation due to the hepatitis. No significant clinical factors for enhanced HCV replication during TACL were found. Compared with HBV reactivation, the frequency of hepatitis attributed to enhanced HCV replication was significantly lower than that for HBV reactivation (8.2% vs. 23.9%, P=0.036). Conclusions: TACL can enhance HCV replication; however, the likelihood of hepatitis and decompensation stemming from enhanced HCV replication was lower than that for HBV reactivation in patients undergoing TACL. (Korean J Hepatol 2011;17:299-306)
Case Report : Scabies in a 2-month-old Infant Successfully Treated with Lindane
Seon Pil Jin,Ji Eun Choi,Chong Hyun Won,So Yun Cho 대한피부과학회 2009 Annals of Dermatology Vol.21 No.2
Diagnosis of scabies in young children can be challenging since the morphology and distribution of skin lesions may differ from adults. Therefore, clinicians should keep scabies in mind in their differential diagnosis in a child who presents with severe pruritic, polymorphic skin lesions. Regarding the treatment of scabies, the reported clinical experience with gamma benzene hexachloride (lindane) in young children is quite limited because of its neurotoxicity. However, a recent review suggests that lindane is an excellent alternative drug with minimal risk. We report the case of a 2-month-old male infant with pruritic, erythematous macules, papules, nodules, vesicles, and pustules from the top of the head to the tip of the toes. Initially, he was thought to have impetigo and antibiotics were prescribed. After obtaining a careful history and with the use of skin scraping, he was diagnosed with scabies. He was successfully treated with lindane with no adverse reactions. (Ann Dermatol 21(2) 200~202, 2009)