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Journal of Environmental Sciences 2014年第6期26卷 1325-1331页

作者： Kwon Jeong dae-sung lee Do-Gun Kim Seok-Oh Ko Department of Civil Engineering Kyung Hee UniversityYongin 446-701 Korea Institute of Construction Technology KUMHO Engineering & ConstructionYongin 449-822 Korea

Effluent organic matter （EfOM） is the major cause of fouling in the low pressure membranes process for wastewater reuse. Coagulation and oxidation of biological wastewater treatment effluent have been applied for the fouling control of microfiltration membranes. However, the change in EfOM structure by pre-treatments has not been clearly identified. The changes of EfOM characteristics induced by coagulation and ozonation were investigated through size exclusion chromatography, UV/Vis spectrophotometry, fluorescence spectrophotometry and titrimetric analysis to identify the mechanisms in the reduction of ultrafiltration （UF） membrane fouling. The results indicated that reduction of flux decline by coagulation was due to modified characteristics of dissolved organic carbon （DOC） content. Total concentration of DOC was not reduced by ozonation. However, the mass fraction of the molecules with molecular weight larger than 5 kDa, fluorescence intensity, aromaticity, highly condensed chromophores, average molecular weight and soluble microbial byproducts decreased greatly after ozonation. These results indicated that EfOM was partially oxidized by ozonation to low molecular weight, highly charged compounds with abundant electron- withdrawing functional groups, which are favourable for alleviating UF membrane flux decline.

关键词： effluent organic matter fouling ultrafiltration oxidation molecular weight distribution acidity

Surface and Through Curing Studies by ATR

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光学学报 2003年第S1期23卷 108-109页

作者： Chun Kee Ann Jae Myoung Ryu dae sung lee Luvantix Co. Ltd. 403-2 Moknae Danwon Ansan Kyoungki Republic of KoreaLuvantix Co. Ltd. 403-2 Moknae Danwon Ansan Kyoungki Republic of KoreaLuvantix Co. Ltd. 403-2 Moknae Danwon Ansan Kyoungki Republic of Korea

The degrees of surface and through cure of UV curable acrylate-based pigmented systems were studied by using ATR(Attenuated Total Reflection) spectroscopy. This paper describes curing investigations of ink coating lay... 详细信息

关键词： Surface and Through Curing Studies by ATR UV on by RAU were of into

Platinum quantum dots-decorated MXene-derived titanium dioxide nanowire/Ti_(3)C_(2) heterostructure for use in solar-driven gas-phase carbon dioxide reduction to yield value-added fuels

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Journal of Energy Chemistry 2023年第7期82卷 627-637,I0013页

作者： Kamakshaiah Charyulu Devarayapalli S.V.Prabhakar Vattikuti Dong Jin Kim Youngsu Lim Bolam Kim Gyuhyeon Kim dae sung lee Department of Environmental Engineering Kyungpook National UniversityBuk-guDaegu 41566Republic of Korea Research Institute of Environmental Science&Technology Core Research InstituteKyungpook National UniversityBuk-guDaegu 41566Republic of Korea School of Mechanical Engineering Yeungnam UniversityGyeongsan 38541Republic of Korea School of Architecture CivilEnvironmental and Energy EngineeringKyungpook National UniversityBuk-guDaegu 41566Republic of Korea

Solar-driven photocatalytic CO_(2) reduction to produce valuable chemicals and fuels offers an attractive strategy in alleviating the energy *** quantum dots(PtQDs)with TiO_(2) nanowire(TiO_(2)NW)/Ti_(3)C_(2) MXene heterostructures(Pt-TiO_(2)NW/Ti_(3)C_(2)) with tight interfacial contacts between the various components were prepared at room temperature via oxidation *** incorporated PtQDs played crucial roles as electron conduction bridges supported by the cocatalyst effect,effectively enhancing the separation efficiencies of photoinduced electron/hole pairs and improving CO_(2) reduction under simulated solar light *** Pt-TiO_(2)NW/Ti_(3)C_(2) heterostructures exhibited remarkable carbon monoxide(CO)and methane(CH_(4)) production at respective rates of 38.14 and 36.15μmol g^(-1)after 10 h of simulated solar light irradiation,an apparent quantum yield of 1.68%,and 79.2%selectivity for *** photocatalytic activities of the Pt-TiO_(2) NW/Ti_(3)C_(2) heterostructures for CO_(2) reduction were significantly enhanced compared to those of TiO_(2)NW/Ti_(3)C_(2) and the single-component photocatalysts,and they exhibited remarkable stabilities even after five *** addition,the densities of states and electronic characteristics of Ti_(3)C_(2) MXene and Pt-TiO_(2)NW/Ti_(3)C_(2) were studied using density functional theory,and a synergistic mechanism of the improvement in CO_(2) photoreduction is proposed.

关键词： MXene CO_(2)reduction Density functional theory Quantum dot Photocatalyst

美国东北部Marcellus页岩层非常规天然气采收率的临界评价

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水文地质工程地质技术方法动态 2012年第4期 7-16页

作者： dae sung lee 赵玉军(翻译) 葛秀珍(校对) Petroleum & Marine Research Department Korea Institute of Geoscience & Mineral Resources Daejeon 305--350 Korea 不详

Marcellus致密含气页岩是美国东北部区域的主要资源。Marcellus页岩层储量巨大，其可回收气体储量估计为30至300TCF，并邻近美国一些主要的前景市场。然而，Marcellus页岩层的气体开采面临许多技术障碍，最主要的技术障碍包括勘探、钻... 详细信息

Marcellus致密含气页岩是美国东北部区域的主要资源。Marcellus页岩层储量巨大，其可回收气体储量估计为30至300TCF，并邻近美国一些主要的前景市场。然而，Marcellus页岩层的气体开采面临许多技术障碍，最主要的技术障碍包括勘探、钻井许可权、增产和回收。由于储层的服务期限取决于原地原始气体含量以及经预存在裂缝开采气体的能力（通过增产措施可使裂缝扩大），因此，勘探是一项复杂的工作；由于钻探成本一般占井总成本的50％，因此钻探工作也面临许多挑战。通过钻进水平井可提高储层的产量，而水平井与低成本的垂直井相比能够钻人储层范围内更多的生产层；最终，必需采用增产方法以提高采气量，并降低消耗性水利用和伴随的裂隙水废物安全处置问题造成的环境影响。我们讨论了典型致密含气页岩层气体经济采收率中涉及的各种挑战，尤其是Marcellus页岩层。

关键词： Marcellus页岩致密地层天然气水力压裂水平井钻探

Regulation of sleep by astrocytes in the hypothalamic ventrolateral preoptic nucleus

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Neural Regeneration Research 2025年第4期20卷 1098-1100页

作者： Jae-Hong Kim Ruqayya Afridi Il-sung Jang Maan Gee lee Kyoungho Suk Brain Korea 21 four KNU Convergence Educational Program of Biomedical Sciences for Creative Future Talents School of MedicineKyungpook National UniversityDaeguRepublic of Korea Department of Pharmacology School of MedicineKyungpook National UniversityDaeguRepublic of Korea Department of Pharmacology School of DentistryKyungpook National UniversityDaeguRepublic of Korea Brain Science&Engineering Institute Kyungpook National UniversityDaeguRepublic of Korea

Astrocytes are functionally dynamic cells that support neurons in multiple ways throughout an organism’s *** astrocytic regulation of neuronal activity has been increasingly recognized in recent *** are now recognized as playing a more complex role than mere bystanders in the central nervous ***,their role in regulating the sleep neurocircuitry is not well *** this perspective,we highlight the role of astrocytes in sleep modulation,with a particular focus on regulatory mechanisms related to the ventrolateral preoptic nucleus(VLPO)of the *** briefly discuss recent literature reporting the role of VLPO astrocytes in regulating sleep-associated behaviors.

关键词： sleep ventrolateral astrocytes

Aligned Ion Conduction Pathway of Polyrotaxane‑Based Electrolyte with Dispersed Hydrophobic Chains for Solid‑State Lithium–Oxygen Batteries

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Nano-Micro Letters 2025年第2期17卷 169-186页

作者： Bitgaram Kim Myeong‑Chang sung Gwang‑Hee lee Byoungjoon Hwang Sojung Seo Ji‑Hun Seo Dong‑Wan Kim Department of Materials Science and Engineering Korea University145 Anam‑RoSeongbuk‑GuSeoul 02841Republic of Korea School of Civil Environmental and Architectural EngineeringKorea University145 Anam‑RoSeongbuk‑GuSeoul 02841Republic of Korea Materials Science and Chemical Engineering Center Institute for Advanced Engineering(IAE)Yongin 17180Republic of Korea

A critical challenge hindering the practical application of lithium–oxygen batteries(LOBs)is the inevitable problems associated with liquid electrolytes,such as evaporation and safety *** study addresses these problems by proposing a modified polyrotaxane(mPR)-based solid polymer electrolyte(SPE)design that simultaneously mitigates solvent-related problems and improves ***-SPE exhibits high ion conductivity(2.8×10^(−3)S cm^(−1)at 25℃)through aligned ion conduction pathways and provides electrode protection ability through hydrophobic chain *** this mPR-SPE into solid-state LOBs resulted in stable potentials over 300 *** situ Raman spectroscopy reveals the presence of an LiO_(2)intermediate alongside Li_(2)O_(2)during oxygen *** situ X-ray diffraction confirm the ability of the SPE to hinder the permeation of oxygen and moisture,as demonstrated by the air permeability *** present study suggests that maintaining a low residual solvent while achieving high ionic conductivity is crucial for restricting the sub-reactions of solid-state LOBs.

关键词： Solid polymer electrolyte Lithium-oxygen batteries Polyrotaxane ion conductivity Hydrophobic chain

Pancreatic stent improves the success rate of needle-knife papillotomy in patients with difficult biliary cannulation

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World Journal of Gastroenterology 2025年第1期31卷 58-67页

作者： Mu-Hsien lee Cheng-Hui Lin Chi-Huan Wu Yung-Kuan Tsou Kai-Feng sung Sheng-Fu Wang Nai-Jen Liu Department of Gastroenterology and Hepatology Chang Gung Memorial Hospital and Chang Gung University College of MedicineTaoyuan 33305Taiwan School of Medicine Chang Gung UniversityTaoyuan 33305Taiwan

BACKGROUND Needle-knife precut papillotomy(NKP)is typically performed ***,it remains unclear whether pancreatic stent(PS)placement can improve the outcomes of *** To explore whether PS placement improves the success rate of NKP in patients with difficult biliary *** This single-center retrospective study included 190 patients who underwent NKP between January 2017 and December 2021 after failed conventional biliary *** cases with incidental pancreatic duct cannulation during conventional biliary cannulation,the decision for pre-NKP PS placement was made at the endoscopist's *** primary outcome was the difference in the NKP success rate between patients with and without PS placement;the secondary outcome was the adverse event *** Among the 190 participants,82 received pre-NKP PS(PS-NKP group)whereas 108 did not[freehand or freehand NKP(FH-NKP)group].Post-NKP selective biliary cannulation was successful in 167(87.9%)patients,and the PS-NKP had a significantly higher success rate than the FH-NKP group(93.9%vs 83.3%,P=0.027).The overall adverse event rates were 7.3%and 11.1%in the PS-NKP and FH-NKP groups,respectively(P=0.493).A periampullary diverticulum(PAD)and significant intraoperative bleeding during NKP were independently associated with NKP failure;however,a pre-NKP PS was the only predictor of NKP *** the 44 participants with PADs,the PS-NKP group had a non-significantly higher NKP success rate than the FH-NKP group(87.5%and 65%,respectively;P=0.076).CONCLUSION PS significantly improved the success rate of NKP in patients with difficult biliary cannulation.

关键词： Difficult biliary cannulation Endoscopic retrograde cholangiopancreatography Needle-knife papillotomy Pancreatic stent Selective biliary cannulation

Nitrile Electrolyte Strategy for 4.9 V-Class Lithium-Metal Batteries Operating in Flame

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Energy & Environmental Materials 2023年第3期6卷 229-237页

作者： Hyunseok Moon sung-Ju Cho dae-Eun Yu Sang-Young lee Department of Chemical and Biomolecular Engineering Yonsei UniversitySeoul 03722Korea Molecular Foundry Lawrence Berkeley National LaboratoryBerkeley CA USA Batteries R&D Center LG Energy SolutionDaejeon 34122Korea

Challenges facing high-voltage/high-capacity cathodes,in addition to the longstanding problems pertinent to lithium(Li)-metal anodes,should be addressed to develop high-energy-density Li-metal *** issue mostly stems from interfacial instability between electrodes and *** carbonate-or ether-based liquid electrolytes suffer from not only volatility and flammability but also limited electrochemical stability ***,we report a nitrile electrolyte strategy based on concentrated nitrile electrolytes(CNEs)with *** CNE consists of high-concentration lithium bis(fluorosulfonyl)imide(LiFSI)in a solvent mixture of succinonitrile(SN)/acetonitrile(AN).The SN/AN solvent mixture is designed to ensure high oxidation stability along with thermal stability,which are prerequisites for high-voltage Li-metal *** CNE exhibits interfacial stability with Li metals due to the coordinated solvation *** nitrate(LiNO_(3))and indium fluoride(InF_(3))are incorporated in the CNE as synergistic co-additives to further stabilize solid-electrolyte interphase(SEI)on Li *** resulting electrolyte(CNE+LiNO_(3)/InF_(3))enables stable cycling performance in Li||LiNi_(0.8)Co_(0.1)Mn_(0.1)and 4.9 V-class Li||LiNi_(0.5)Mn_(1.5)O_(4)***,the Li||LiNi_(0.5)Mn_(1.5)O_(4)cell maintains its electrochemical activity at high temperature(100℃)and even in flame without fire or explosion.

关键词： 4.9 V-class cathodes electrolyte-electrode interfaces lithium-metal batteries nitrile electrolytes safety

Flexible and disposable paper-based gas sensor using reduced graphene oxide/chitosan composite

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Journal of Materials Science & Technology 2022年第6期101卷 165-172页

作者： Hyunjun Park Woong Kim Sang Won lee Joohyung Park Gyudo lee dae sung Yoon Wonseok lee Jinsung Park Department of Control and Instrumentation Engineering Korea UniversitySejong 30019Republic of Korea School of Biomedical Engineering Korea UniversitySeoul 02841Republic of Korea Department of Biotechnology and Bioinformatics Korea UniversitySejong 30019Republic of Korea Department of Electrical Engineering Korea National University of TransportationChungju 27469Republic of Korea

Nitrogen dioxide(NO_(2))is a representative toxicant in air pollution that mostly arises from the exhaust gas released by *** is related to various respiratory diseases such as pneumonia and sudden infant death ***,because the toxicity of nitrogen dioxide is high in overpopulated areas(i.e.,a capital or metropolis),the development of simple,practical,and facile sensors is highly *** work presents a flexible and disposable paper-based NO_(2)sensor based on a reduced graphene oxide/chitosan(r GO/CS)*** synthesized r GO/CS composite can be easily flexed and deformed into various shapes,which are attributed to chitosan molecules that function as a dispersion and reduction agent and support *** addition,this composite can be attached to paper owing to its adhesive property;hence it can be utilized in versatile applications in a disposable *** analyzing the conductive change of the r GO/CS composite when it reacts with NO_(2),we can detect nitrogen dioxide in a concentration range of 0–100 ppm with a detection limit of 1 ***,we performed NO_(2)detection in the exhaust gas released by automobiles using the r GO/CS composite for practical *** results indicated that the r GO/CS composite has the potential to be used in feasible gas sensing as a facile and disposable sensor under various conditions.

关键词： Reduced graphene oxide Chitosan Composite material Nitrogen dioxide Paper-based gas sensor Flexible and disposable sensor

Creutzfeldt-Jakob disease presenting with bilateral hearing loss:A case report

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World Journal of Clinical Cases 2022年第18期10卷 6333-6337页

作者： Seunghee Na Se A lee Jong dae lee Eek-sung lee Tae-Kyeong lee Department of Neurology Incheon St.Mary’s HospitalThe Catholic University of KoreaIncheon 21431South Korea Department of Otorhinolaryngology-Head and Neck Surgery Soonchunhyang University Bucheon HospitalBucheon 14584South Korea Department of Neurology Soonchunhyang University Bucheon HospitalBucheon 14584South Korea

BACKGROUND Sporadic Creutzfeldt-Jakob disease(s CJD)is a prion disease characterized as a fatal transmissible neurodegenerative *** is often the first presenting symptom of s CJD,but hearing loss as an early manifestation is very *** SUMMARY A 76-year-old man presented with bilateral sudden hearing impairment and dizziness for 10 *** was taking medications for hypertension and *** denied any difficulty with activities of daily living or hearing impairment before the onset of *** tone audiometry showed bilateral severe hearing *** magnetic resonance imaging(MRI)and laboratory tests were within normal *** his diagnosis of sudden sensory hearing loss,the patient received corticosteroid treatment but it was *** weeks later,he complained of aggravated gait impairment,disorientation,and cognitive *** brain MRI showed diffuse cortical high signal intensities on diffusion-weighted *** cerebrospinal fluid analysis,the real-time quaking-induced conversion assay was positive,and 14-3-3 protein was detected in the by western *** all the data,we diagnosed probable s CJD,and the patient’s symptoms rapidly progressed into akinetic *** For patients with abrupt bilateral hearing impairment,especially in the elderly,various differential diagnoses,including s CJD,should be considered.

关键词： Case report Creutzfeldt-Jakob disease Bilateral hearing loss Diffusion-weighted imaging Real-time quaking-induced conversion assay