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光谱学与光谱分析 2018年第6期38卷 1970-1974页

作者： Jong-moon Kim myung Duk Jang JIN Biao Yoon Jung Jang Department of Health Care and Biotechnology Kyungwoon UniversityGumi CityGyeong-buk 730-739Republic of Korea Materials & Energy Engineering College of IT & Energy Kyungwoon UniversityGumi CityGyeong-buk 730-739Republic of Korea Instrumental

The effect of various metal ions on the DNA mediated energy transfer between simultaneously bound drugs was investigated using spectroscopic *** was found that addition of divalent metal ions(Mg^(2+),Ca^(2+),Mn^(2+),Co^(2+)and Ni^(2+))resulted in further decrease of the ethidium fluorescence intensity,while a small increase was observed in the TMPyP emission band,implying that the energy of excited ethidium was transferred to *** DNA-mediated quenching efficiency between ethidium and TMPyP was significantly enhanced by the presence of all metal *** the divalent metal ions,alkali earth metal ions and Mn^(2+)displayed higher quenching efficiencies than other transition metal *** distances required to permit the energy transfer between the two drugs in DNA were calculated as 68,66,62,48and 38in the presence of100μmol·L^(-1 )of Mg^(2+),Ca^(2+),Mn^(2+),Co^(2+)and Ni ^(2+)ion,*** disturbed binding conformation of TMPyP in DNA by metal ions presumably accounts for the difference.

关键词：光学文摘英文

Weapon effectiveness and the shapes of damage functions

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Defence Technology（防务技术） 2021年第2期17卷 617-632页

作者： Sei-Hoon moon th R&D Institute Agency for Defense DevelopmentYusungDaejeon305-152Republic of Korea Department of Mechanical and Aerospace Engineering Naval Postgraduate School MontereyCA93940USA

This paper provides a review of methods of assessing a fragmentation weapon’s effectiveness against a point target or an area target with keeping the focus on the necessity of using the Carleton damage function with the correct shape ***,cookie-cutter damage functions are redefined to preserve the shape factor of and to have the same lethal area as the corresponding Carleton damage ***,closed-form solutions of the effectiveness methods are obtained by using those cookie-cutter damage functions and the Carleton damage ***,the closed-form solutions are applied to calculate the probability of damaging a point target and the expected fractional damage to an area target for several attack scenarios by using cookie-cutter damage functions and the Carleton damage functions with different shape *** comparison of the calculation results shows that using cookie-cutter damage functions or the Carleton damage function with a wrong shape factor results in quite significant differences from using the original Carleton damage function with a correct shape factor when weapon’s delivery error deviations are less than or comparable to the lengths of the lethal area and the aim point is far from a *** effectiveness methods improved in this paper will be useful for mission planning utilizing the precision-guided munitions in circumstances where the collateral damage should be reduced.

关键词： Weapon effectiveness Point target Area target Cookie-cutter damage function Carleton damage function

Efficient solar fuel production enabled by an iodide oxidation reaction on atomic layer deposited MoS_(2)

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Carbon Energy 2023年第12期5卷 200-214页

作者： Young Sun Park Gyumin Jang Inkyu Sohn Hyungsoo Lee Jeiwan Tan Juwon Yun Sunihl Ma Jeongyoub Lee Chan Uk Lee Subin moon Hayoung Im seung-Min Chung seungho Yu Hyungjun Kim Jooho moon Department of Materials Science and Engineering Yonsei UniversitySeoulRepublic of Korea School of Electrical and Electronic Engineering Yonsei UniversitySeoulRepublic of Korea Energy Storage Research Center Korea Institute of Science and TechnologySeoulRepublic of Korea

Oxygen evolution reaction(OER)as a half-anodic reaction of water splitting hinders the overall reaction efficiency owing to its thermodynamic and kinetic *** oxidation reaction(IOR)with low thermodynamic barrier and rapid reaction kinetics is a promising alternative to the ***,we present a molybdenum disulfide(MoS_(2))electrocatalyst for a high-efficiency and remarkably durable anode enabling ***_(2)nanosheets deposited on a porous carbon paper via atomic layer deposition show an IOR current density of 10 mA cm^(–2)at an anodic potential of 0.63 V with respect to the reversible hydrogen electrode owing to the porous substrate as well as the intrinsic iodide oxidation capability of MoS_(2)as confirmed by theoretical *** lower positive potential applied to the MoS_(2)-based heterostructure during IOR electrocatalysis prevents deterioration of the active sites on MoS_(2),resulting in exceptional durability of 200 ***,we fabricate a two-electrode system comprising a MoS_(2)anode for IOR combined with a commercial Pt@C catalyst cathode for hydrogen evolution ***,the photovoltaic–electrochemical hydrogen production device comprising this electrolyzer and a single perovskite photovoltaic cell shows a record-high current density of 21 mA cm^(–2)at 1 sun under unbiased conditions.

关键词： iodide oxidation reaction molybdenum sulfide photovoltaic-electrochemical hydrogen production solar hydrogen

Surgical management of colonic diverticular disease:Discrepancy between right- and left-sided diseases

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World Journal of Gastroenterology 2014年第29期20卷 10115-10120页

作者： Heung-Kwon Oh Eon Chul Han Heon-Kyun Ha Eun Kyung Choe Sang Hui moon seung-Bum Ryoo seung-Yong Jeong Kyu Joo Park Division of Colorectal Surgery Department of SurgerySeoul National University College of Medicine

AIM:To compare the outcome of the surgical management of left-sided and right-sided diverticular ***:The medical records of 77 patients who were surgically treated for diverticular disease between 1999 and 2010 in a tertiary referral hospital were retrospectively *** study population was limited to cases wherein the surgical specimen was confirmed as diverticulosis by *** diverticula were classified as those arising from the cecum,ascending colon,and transverse colon,and those from the descending colon,sigmoid colon,and rectum were classified as left-sided *** assess the changing trend of occurrence of diverticulosis,data were compared with two previous studies of 51 ***:The proportion of left-sided disease cases was significantly increased compared to the results of our previous studies in 1994 and 2001,(27.5%vs48.1%,P<0.05).Moreover,no differences in gender,body mass index,multiplicity of the diverticula,fever,or leukocytosis were noted between patients with rightsided and left-sided ***,patients with right-sided disease were significantly younger(50.9year vs 64.0 year,P<0.01).Furthermore,left-sided disease was significantly associated with a higher incidence of complicated diverticulitis(89.2%vs 57.5%,P<0.01),combined resection due to extensive inflammation(21.6%vs 5.0%,P<0.05),operative complications(51.4%vs 27.5%,P<0.05),and in-hospital mortality(10.8%vs 0%,P<0.05),along with longer post-operative hospitalization duration(21.3±10.2 d vs 10.6±8.1 d,P<0.05).CONCLUSION:Compared with right-sided diverticular disease,the incidence of left-sided disease in Korea has increased since 2001 and is associated with worse surgical outcomes.

关键词： Colonic diverticulosis Diverticular bleeding Diverticulitis Poor surgical outcome Left-sided diverticulitis

Endoscopic fibrin glue injection for closure of pancreatocutaneous fistula following transgastric endoscopic necrosectomy

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World Journal of Gastroenterology 2008年第39期14卷 6093-6095页

作者： Ji Woong Jang Do Hyun Park Sung-Hoon moon Sang Soo Lee Dong Wan Seo Sung Koo Lee myung-Hwan Kim Division of Gastroenterology Department of Internal MedicineUniversity of Ulsan College of MedicineAsan Medical CenterSeoul 138-736South Korea

Transgastric endoscopic necrosectomy has been recently introduced as the effective and alternative management of infected pancreatic necrosis and pancreatic abscess. However,up to 40% of patients who undergo endoscopic necrosectomy may need an additional percutaneous approach for subsequent peripancreatic fluid collection or non-resolution of pancreatic necrosis. This percutaneous approach may lead to persistent pancreatocutaneous fistula,which remains a serious problem and usually requires prolonged hospitalization,or even open-abdominal surgery. We describe the first case of pancreatocutaneous fistula and concomitant abdominal wall defect following transgastric endoscopic necrosectomy and percutaneous drainage,which were endoscopically closed with fibrin glue injection via the necrotic cavity.

关键词： Fibrin glue Pancreatocutaneous fistula Infected pancreatic necrosis Pancreatic abscess Endoscopic necrosectomy

Rapid manufacturing of SiC molds with micro-sized holes using abrasive water jet

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中国有色金属学会会刊：英文版 2009年第B9期19卷 178-182页

作者： Bo-Sung SHIN Kang-Su PARK Yeon-Kyoung BAHK Sun-Ki PARK Jung-Han LEE Jeung-Sang GO myung-Chang KANG Chae-moon LEE ERC/NSDM Pusan National University School of Mechanical Engineering Pusan National University Microhole Company NCRC Pusan National University Samsung Electro-Mechanics

Silicon carbide (SiC) is highly wear resistant with good mechanical properties, including high temperature strength, excellent chemical resistance, and high thermal conductivity and thermal shock resistance. SiC molds, which can be produced with diverse microstructural features, are now widely used in glass molding owing to their excellent characteristics, and also have potential applicability in IT industries. SiC molds are traditionally fabricated by silicon micromachining or dicing. The fabrication cost of silicon micromachining is very high, however, because several expensive masks are needed. Furthermore, the fabrication time is very long. Meanwhile, it is difficult to make micro-patterned molds with arbitrary shapes using dicing saws. Abrasive water jet (AWJ) is widely applied to cut and drill very brittle, soft and fibrous materials. It offers high energy density, the absence of a heat affected zone(HAZ), high performance, and an environment friendly process. In spite of these advantages, micro-hole drilling via conventional AWJ processing suffers from notable shortcomings. We proposed a new abrasive supplying method of AWJ. The proposed method reduces frosting phenomena, and provides micro-machining of AWJ. The characteristics of a hole machined was investigated by the proposed AWJ process according to the ratio of water and abrasives. With the optimal experimental conditions, 3×3 array SiC molds with the diameter of 700 μm and depth of 900 μm were successfully manufactured.

关键词：快速模具制造磨料水射流碳化硅微型硅微加工型孔最佳实验条件机械性能

Mineralogical characteristics of bentonites occurring in Ningcheng and Jianping area,China

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Science China Earth Sciences 2010年第4期53卷 541-549页

作者： GU JaRang moon YongHee moon HiSoo Department of Earth System Sciences Yonsei University Institute of Earth Atmosphere Astronomy BK21 Yonsei University

This study is focused on the basic mineralogical and chemical characteristics of some selected samples from Jianping(JP) and Ningcheng(NC) area,*** were studied using X-ray diffraction(XRD),expandability,Greene-Kelly test,specific surface area,cation exchange capacity(CEC),differential thermal analysis(DTA),and chemical *** bulk samples consist of mainly montmorillonites along with appreciable amounts of cristobalite and with small amounts of quartz,feldspar and *** basal spacings of montmorillonites in all these examined samples show at about 1.5 nm,indicating that pre-dominant cations were *** crystallite thickness of the present sample lies from 0.449 to 0.710 nm(4.58-7.24 layers).As Greene-Kelly test,samples from Ningcheng area confirmed appreciable amount of beidellite component but samples from Jianping area did not contain anything about *** area of samples varies from 671 to 766 m2 g-1 depending on the amounts of *** CEC ranges from 70.30 to 82.75 meq 100g-1 in <2 μm size *** DTA curves are considered abnormal *** from Ningcheng area show relatively higher amount of SiO2 than those from Jianping area,possibly due to difference of parent rock *** element(Y,Nb,Ce and Zr) data are plotted on acidic to intermediate *** is apparent that no large chemical transfer would have been necessary during alteration.

关键词： montmorillonite beidellite expandability Greene-Kelly test trace element

Faraday rotations,ellipticity,and circular dichroism in magneto-optical spectrum of moire superlattices

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Chinese Physics B 2021年第7期30卷 18-32页

作者： J A Crosse Pilkyung moon Arts and Sciences New York University ShanghaiShanghai 200122China NYU-ECNU Institute of Physics at NYU Shanghai Shanghai 200062China Department of Physics New York UniversityNew York 10003USA

We study the magneto-optical conductivity of a number of van der Waals heterostructures,namely,twisted bilayer graphene,AB–AB and AB–BA stacked twisted double bilayer graphene and monolayer graphene and AB-stacked bilayer graphene on hexagonal boron *** the magnetic field increases,the absorption spectrum exhibits a self-similar recursive pattern reflecting the fractal nature of the energy *** twisted bilayer graphene displays only weak circular dichroism,the other four structures display strong circular dichroism with monolayer graphene and AB-stacked bilayer graphene on hexagonal boron nitride being particularly pronounced owing to strong inversion symmetry breaking properties of the hexagonal boron nitride *** the left and right circularly polarized light interact with these structures differently,plane-polarized incident light undergoes a Faraday rotation and gains an ellipticity when *** size of the respective angles is on the order of a degree.

关键词： 2D-materials van der Waals heterostructures magneto-optical conductivity graphene

Effect of electrical stimulation on neural regeneration via the p38-RhoA and ERK1/2-Bcl-2 pathways in spinal cord-injured rats

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Neural Regeneration Research 2018年第2期13卷 340-346页

作者： Min Cheol Joo Chul Hwan Jang Jong Tae Park seung Won Choi seungil Ro Min Seob Kim moon Young Lee Department of Rehabilitation Medicine and Institute of Wonkwang Medical Science School of Medicine Wonkwang University Department of Neurosurgery School of Medicine Wonkwang University Department of Anesthesiology and Pain Medicine School of Medicine Wonkwang University Department of Physiology and Cell Biology School of Medicine University of Nevada Department of Physiology and Institute of Wonkwang Medical Science School of Medicine Wonkwang University

Although electrical stimulation is therapeutically applied for neural regeneration in patients, it remains unclear how electrical stimulation exerts its effects at the molecular level on spinal cord injury （SCI）. To identify the signaling pathway involved in electrical stimulation improving the function of injured spinal cord, 21 female Sprague-Dawley rats were randomly assigned to three groups： control （no surgical intervention, n = 6）, SCI （SCI only, n = 5）, and electrical simulation （ES; SCI induction followed by ES treatment, n = 10）. A complete spinal cord transection was performed at the 10^th thoracic level. Electrical stimulation of the injured spinal cord region was applied for 4 hours per day for 7 days. On days 2 and 7 post SCI, the Touch-Test Sensory Evaluators and the Basso-Beattie-Bresnahan locomotor scale were used to evaluate rat sensory and motor function. Somatosensory-evoked potentials of the tibial nerve of a hind paw of the rat were measured to evaluate the electrophysiological function of injured spinal cord. Western blot analysis was performed to measure p38-RhoA and ERK1/2-Bcl-2 pathways related protein levels in the injured spinal cord. Rat sensory and motor functions were similar between SCI and ES groups. Com- pared with the SCI group, in the ES group, the latencies of the somatosensory-evoked potential of the tibial nerve of rats were significantly shortened, the amplitudes were significantly increased, RhoA protein level was significantly decreased, protein gene product 9.5 expression, ERK1/2, p38, and Bcl-2 protein levels in the spinal cord were significantly increased. These data suggest that ES can promote the recovery of electrophysiological function of the injured spinal cord through regulating p38-RhoA and ERK1/2-Bcl-2 pathway-related protein levels in the injured spinal cord.

关键词： Bcl-2 ERKI/2 p38 PGP9.5 RhoA spinal cord injury somatosensory evoked potential muscle contraction electrical impulses neural regeneration

Coherent interface driven super-plastic elongation of brittle intermetallic nano-fibers at room temperature

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Journal of Materials Science & Technology 2022年第20期115卷 97-102页

作者： Eun-Ae Choi seung Zeon Han Hyung Giun Kim Jee Hyuk Ahn Sung Hwan Lim Sangshik Kim Nong-moon Hwang Kwangho Kim Jehyun Lee Department of Special Alloy Korea Institute of Materials ScienceChangwon 642-831Korea Gangwon Regional Division Korea Institute of Industrial TechnologyGangneung 210-340Korea Department of Advanced Materials Science&Engineering Kangwon National UniversityChuncheon 200-701Korea Department of Materials Science and Engineering ReCAPTGyeongsang National UniversityChinju 660-701Korea Department of Materials Science and Engineering Seoul National UniversitySeoul 151-744Korea Department of Materials Science and Engineering Pusan National UniversityBusan 46241Korea Department of Materials Science and Engineering Changwon National UniversityChangwon 641-773Korea

The intermetallic compound such as Ni_(2)Si has a brittle ***,monolithic intermetallic compounds have not yet been prepared by mechanical *** mechanical drawing of bulk CuNi_(2)Si alloy at room temperature,we observed more than 400%plastic elongation of hard and brittle Ni_(2)Si intermetallic *** calculation based on the density functional theory reveals that the fully coherent interface induces strain on the intermetallic compound surrounded by the matrix,and lowers the intrinsic stacking fault energy below the level required to break an interatomic *** new interface between the Ni_(2)Si intermetallic and Cu matrix formed by the plastic deformation is as stable as the original coherent interface formed by precipitation,and the activation energy of the newly formed interface to slip is similar to that of the Cu *** of these make plastic deformation of brittle Ni_(2)Si intermetallic possible by slip without failure.

关键词： Ni_(2)Si Intermetallic compound Plastic deformation Precipitation Brittle fiber Interface Density functional theory