检索结果-南通市图书馆

[001]-texturing of(K,Na)NbO_(3)-based piezoceramics with a pseudocubic structure and their application to piezoelectric devices

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Materiomics 2024年第3期10卷 632-642页

作者： Su-Hwan Go Seok-jung Park seung-Hyun Kim Seok-June Chae Eun-Ji Kim Geun-Su Lee Sahn Nahm Department of Materials Science and Engineering Korea UniversitySeoul02841Republic of Korea

0.96(K_(0.5)Na_(0.5-z)Li_(z))(Nb_(0.92)Sb_(0.08))O_(3)-0.04(Ca_(0.5)Sr_(0.5))ZrO_(3)[(KN_(0.5-z)L_(z))NS-CSZ]piezoceramics(0≤z≤0.04)were aligned in the[001]orientation using 3%(in mole)NaNbO_(3)templates with a large Lotgering factor(>97%).Their crystal structures transformed from the orthorhombic-pseudocubic(O-P)structure to the orthorhombic-tetragonal-pseudocubic(O-T-P)structure with an increasing *** P structure was interpreted as a rhombohedral R3m *** piezoelectricity of the compositions increased after[001]-texturing,and the enhancement was proportional to the O phase *** composition(z=0.03)exhibited the highest piezoelectric constant(d_(33);670 pC/N)and electromechanical coupling factor(k_(p);0.56).Piezoelectric energy harvesters were produced using the untextured and textured samples(z=0.03).The textured harvester delivered a large power density of 26.6 mW/mm^(3),which was larger than that of the untextured harvester owing to the enhanced kp and d_(33)×g_(33) of the textured piezoceramic.A multilayer actuator was produced using the textured sample(z=0.03),and it exhibited a large acceleration(44.2 G)and displacement(±3,730 mm)at±25 ***,the[001]-textured(KN_(0.47)L_(0.03))NS-CSZ piezoceramic is suitable for piezoelectric energy harvesters and actuators.

关键词： KNN-Based piezoceramic Lead-free Energy harvester Actuator Reactive template grain growth

Occipital artery bypass importance in unsuitable superficial temporal artery:Two case reports

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2023年第9期11卷 2091-2097页

作者： Jong-Hwan Hong Sung-Chan jung Han-seung Ryu Tae-Sun Kim Sung-Pil Joo Department of Neurosurgery Chonnam National University Hospital and Medical SchoolGwangju 61469South Korea

BACKGROUND Superficial temporal artery-middle cerebral artery(STA-MCA)bypass helps treat cerebral ***,the STA is not available for bypass in some ***,with some technical tips,the authors introduced a bypass technique using the occipital artery(OA).CASE SUMMARY Two female patients complained of *** magnetic resonance imaging(MRI)indicated contralateral infarction from the MCA *** Diamox single photon emission computed tomography or perfusion MRI,the contralateral front parietotemporal reserve was *** transfemoral cerebral angiography,the STA was thin with a weak flow;however,the OA was *** OA-MCA end-to-side extracranial-intracranial bypass surgery was implemented instead of STA because the caliber was too *** postoperative course was uneventful in both cases,with well-maintained bypass patency and neurological stability during *** OA might be an acceptable alternative for MCA cerebral ischemic cases with an unsuitable STA.

关键词： Bypass Occipital artery Superficial temporal artery Cerebral ischemia Case report

Retinal injury following intravitreal injection of a dexamethasone implant in a vitrectomized eye

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2017年第6期10卷 1019-1020页

作者： seung Min Lee Jae Woo jung Sung Who Park Ji Eun Lee Ik Soo Byon Research Institute for Convergence of Biomedical Science and Technology Pusan National University Yangsan Hospital Yangsan 50612 Korea Department of Ophthalmology College of Medicine Pusan National University Yangsan 50612 Korea Biomedical Research Institute Pusan National University Hospital Busan 49241 Korea

Lee SM, jung JW, Park SW, Lee JE, Byon IS. Retinal injury following intravitreal injection of a dexamethasone implant in a vitrectomized eye. Int J Ophthalmo12017; 10（6）： 1019-1020

关键词： ME Retinal injury following intravitreal injection of a dexamethasone implant in a vitrectomized eye

Classification of hepatobiliary scintigraphy patterns in segmented gallbladder according to anatomical discordance

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2023年第11期11卷 2423-2434页

作者： Yun-Chae Lee Won-Sik jung Chang-Hun Lee Seong-Hun Kim seung-Ok Lee Division of Gastroenterology Department of Internal MedicineJeonbuk National University Medical SchoolJeonju 54907JeonbukSouth Korea Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital Jeonju 54907JeonbukSouth Korea

BACKGROUND Hepatobiliary scintigraphy(HBS)is a useful diagnostic imaging technique that uses radiotracers to evaluate the function of the gallbladder(GB)and biliary *** segmented GB,some HBS images reveal a discordant GB boundary as compared to anatomical *** To evaluate the characteristics of HBS in segmented GB and determine the clinical relevance according to HBS *** A total of 268 patients with chronic cholecystitis,gallstones,or biliary colic symptoms who underwent HBS between 2011 and 2020 were *** GB was defined as segmental luminal narrowing of the GB body on computed tomography(CT)or magnetic resonance(MR)images,and HBS was examined 1 mo before or after CT or *** GB was classified into 3 types based on the filling and emptying patterns of the proximal and distal segments according to the characteristics of HBS images,and GB ejection fraction(GBEF)was identified:Type 1 was defined as a normal filling and emptying pattern;Type 2 was defined as an emptying defect on the distal segment;and Type 3 was defined as a filling defect in the distal *** Segmented GB accounted for 63 cases(23.5%),including 36 patients(57.1%)with Type 1,18 patients(28.6%)with Type 2,and 9 patients(14.3%)with Type 3 emptying ***,approximately 43%of HBS images showed a discordant pattern as compared to anatomical imaging of segmented *** there were no significant differences in clinical symptoms,rate of cholecystectomy,or pathological findings based on the type,most gallstones occurred in the distal *** GBEF was 62.50%±24.79%for Type 1,75.89%±17.21%for Type 2,and 88.56%±7.20%for Type *** 1 showed no difference in reported GBEF compared to the non-segmented GB group(62.50%±24.79%vs 67.40%±21.78%).In contrast,the reported GBEF was higher in Types 2 and 3 with defective emptying and filling when compared to Type 1(80.11%±15.70%vs 62.57%±24.79%;P=0.001).CONCLUSION In segmented GB,discordance i

关键词： Gallbladder Segmented Gallbladder emptying Radionuclide imaging Misdiagnosis Cholecystitis

Effect of silicon carbide-based iron catalyst on reactor optimization for non-oxidative direct conversion of methane

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第6期81卷 519-532,I0012页

作者： Eun-hae Sim Sung Woo Lee Jin Ju Lee seung Ju Han jung Ho Shin Gracia Lee Sungrok Ko Kwan-Young Lee Yong Tae Kim C1 Gas&Carbon Convergent Research Center Korea Research Institute of Chemical TechnologyDaejeon 34114Republic of Korea Department of Chemical and Biological Engineering Korea University145 Anam-roSeoul 02841Republic of Korea Department of Chemical and Biomolecular Engineering Yonsei University50 Yonsei-roSeoul 03722Republic of Korea Chemical Data-Driven Research Center Korea Research Institute of Chemical TechnologyDaejeon 34114Republic of Korea Prospective Tech.Exploring Section Basic Chemical R&D centerLottechemical Corp.Daejeon 34059Republic of Korea Department of Advanced Materials and Chemical Engineering University of Science and Technology(UST)Gajeong-dongYuseongDaejeon 34113Republic of Korea

The conversion of methane to olefins,aromatics,and hydrogen(MTOAH)can be used to stably obtain hydrocarbons when the effect of the catalytic surface is optimized from the reaction engineering *** this study,Fe/Si C catalysts were packed into a quartz tube *** catalytic surfaces of Si C and the impregnated Fe species decreased the apparent activation energies(E_a)of methane consumption in the blank reactor between 965 and 1020℃.Consequently,the hydrocarbon yield increased by 2.4times at 1020℃.Based on the model reactions of ethane,ethylene,and acetylene mixed with hydrogen in the range of 500-1020℃,an excess amount of Fe in the reactor favored the C-C coupling reaction over the selective hydrogenation of acetylene;consequently,coke formation was favored over the hydrogenation *** gas-phase reactions and catalyst properties were optimized to increase hydrocarbon yields while reducing coke *** 0.2Fe catalyst-packed reactor(0.26 wt%Fe)resulted in a hydrocarbon yield of 7.1%and a coke selectivity of<2%when the ratio of the void space of the postcatalyst zone to the catalyst space was adjusted to be≥*** on these findings,the facile approach of decoupling the reaction zone between the catalyst surface and the gas-phase reaction can provide insights into catalytic reactor design,thereby facilitating the scale-up from the laboratory to the commercial scale.

关键词： Non-oxidative methane conversion Ethylene Aromatic Methane pyrolysis Fe/SiC Coke resistance Catalytic reactor

Trends and risk factors of elderly-onset Crohn’s disease: A nationwide cohort study

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2020年第4期26卷 404-415页

作者： jung Min Moon Eun Ae Kang Kyungdo Han seung Wook Hong Hosim Soh Seona Park Jooyoung Lee Hyun jung Lee Jong Pil Im Joo Sung Kim Department of Internal Medicine Liver Research InstituteSeoul National University College of MedicineSeoul 03080South Korea Department of Biostatistics College of MedicineThe Catholic University of KoreaSeoul 06591South Korea

BACKGROUND The incidence of inflammatory bowel disease(IBD)is increasing in *** risk factors associated with IBD development have been *** To investigate trends and environmental risk factors of Crohn’s disease(CD)diagnosed in persons aged≥40 years in South *** Using the National Health Insurance Service database,a total of 14060821 persons aged>40 years who underwent national health screening in 2009 were followed up until December *** with newly diagnosed CD were enrolled and compared with non-CD *** was identified according to the International Classification of Diseases 10th revision and the rare/intractable disease registration program codes from the National Health Insurance Service *** mean follow-up periods was 7.39 ***,sex,diabetes,hypertension,smoking,alcohol consumption,regular exercise,body mass index,anemia,chronic kidney disease(CKD)and dyslipidemia were adjusted for in the multivariate analysis *** During the follow-up,1337(1.33/100000)patients developed *** in the middle-aged group(40-64 years)had a higher risk than women[adjusted hazard ratio(aHR)1.46,95%confidence interval(CI):1.29-1.66];however,this difference tended to disappear as the age of onset *** the middle-aged group,patients with a history of smoking[(aHR 1.46,95%CI:1.19-1.79)and anemia(aHR 1.85,95%CI:1.55-2.20)]had a significantly higher CD *** the elderly group(age,≥65 years),ex-smoking and anemia also increased the CD risk(aHR 1.68,95%CI:1.22-2.30)and 1.84(95%CI:1.47-2.30,respectively).Especially in the middle-aged group,those with CKD had a statistically elevated CD risk(aHR 1.37,95%CI:1.05-1.79).Alcohol consumption and higher body mass index showed negative association trend with CD incidence in both of the age groups.[Middle-aged:aHR 0.77(95%CI:0.66-0.89)and aHR 0.73(95% CI:0.63-0.84),respectively][Elderly-group:aHR 0.57(95% CI:0.42-0.78)and aHR 0.84(95%CI 0.67-1.04),respectively].For regular p

关键词： Crohn’s disease Aged Environmental Risk factors Epidemiology Nationwide cohort

Nanotherapeutics for regeneration of degenerated tissue infected by bacteria through the multiple delivery of bioactive ions and growth factor with antibacterial/angiogenic and osteogenic/odontogenic capacity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Bioactive Materials 2021年第1期6卷 123-136页

作者： Ahmed El-Fiqi Nandin Mandakhbayar seung Bin Jo Jonathan C.Knowles jung-Hwan Lee Hae-Won Kim Institute of Tissue Regeneration Engineering(ITREN) Dankook UniversityCheonan31116Republic of Korea Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center for Regenerative Medicine Dankook UniversityCheonan31116Republic of Korea Glass Research Department National Research CentreCairo12622Egypt Division of Biomaterials and Tissue Engineering UCL Eastman Dental Institute256 Grays Inn RoadLondonWC1X 8LDUK The Discoveries Centre for Regenerative and Precision Medicine UCL CampusLondonUK Department of Biomaterials Science School of DentistryDankook UniversityCheonan31116Republic of Korea UCL Eastman-Korea Dental Medicine Innovation Centre Dankook UniversityCheonan31116Republic of Korea

Therapeutic options are quite limited in clinics for the successful repair of infected/degenerated *** the prevalent treatment is the complete removal of the whole infected tissue,this leads to a loss of tissue function and serious *** the dental pulp infection,as one of the most common dental problems,was selected as a clinically relevant case to regenerate using a multifunctional nanotherapeutic *** this,a mesoporous bioactive glass nano-delivery system incorporating silicate,calcium,and copper as well as loading epidermal growth factor(EGF)was designed to provide antibacterial/pro-angiogenic and osteo/odontogenic multiple therapeutic ***-functionalized Cu-doped bioactive glass nanospheres(Cu-BGn)were prepared to be 50–60 nm in size,mesoporous,positive-charged and *** Cu-BGn could release bioactive ions(copper,calcium and silicate ions)with therapeutically-effective *** Cu-BGn treatment to human umbilical vein endothelial cells(HUVEC)led to significant enhancement of the migration,tubule formation and expression of angiogenic gene(*** endothelial growth factor,VEGF).Furthermore,the EGF-loaded Cu-BGn(EGF@Cu-BGn)showed pro-angiogenic effects with antibacterial activity against ***,a pathogen commonly involved in the pulp *** note,under the co-culture condition of HUVEC with ***,the secretion of VEGF was *** addition,the osteo/odontogenic stimulation of the EGF@Cu-BGn was evidenced with human dental pulp stem *** local administration of the EGF@Cu-BGn in a rat molar tooth defect infected with *** revealed significant in vivo regenerative capacity,highlighting the nanotherapeutic uses of the multifunctional nanoparticles for regenerating infected/damaged hard tissues.

关键词： Nanotherapeutics Mesoporous bioglass nanospheres Copper ion/Growth factor Antibacterial/angiogenesis Osteogenesis/odontogenesis

ELK3-ID4 axis governs the metastatic features of triple negative breast cancer

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Oncology Research 2024年第1期32卷 127-138页

作者： JIN-HO CHOI JOO DONG PARK seung HEE CHOI EUN-SU KO HYE jung JANG KYUNG-SOON PARK Department of Biomedical Science CHA UniversitySeongnamKorea

Purpose:Cancer cell metastasis is a multistep process,and the mechanism underlying extravasation remains ***3 is a transcription factor that plays a crucial role in regulating various cellular processes,including cancer *** on the finding that ELK3 promotes the metastasis of triple-negative breast cancer(TNBC),we investigated whether ELK3 regulates the extravasation of TNBC by forming the ELK3-ID4 ***4 functions as a transcriptional regulator that interacts with other transcription factors,inhibiting their activity and subsequently influencing various biological processes associated with cell differentiation,survival,growth,and ***:We assessed the correlation between the expression of ELK3 and that of ID4 in TNBCs using bioinformatics analyses,QRT-PCR,western blot analysis,luciferase reporter assays,and chromatin ***,adhesion,invasion,and lung metastasis assays were employed to determine whether the ELK3-ID4 axis regulates the metastatic features of ***:We found that ELK3 binds directly to a binding motif close to the ID4 promoter to repress promoter *** expression of E-cadherin in TNBC was regulated by the ELK3-ID4 *** vitro and in vivo analyses showed that inhibiting ID4 expression in ELK3-knockdown MDA-MB-231(ELK3KD)cells restored the ability to extravasate and ***:The results indicate that the ELK3 regulates ID4 promoter activity,and that the ELK3-ID4 axis regulates the metastatic characteristics of TNBC ***,the data suggest that the ELK3-ID4 axis regulates metastasis of TNBCs by modulating expression of E-cadherin.

关键词： E-cadherin Extravasation Colonization

Impact of Transition Metal Layer Vacancy on the Structure and Performance of P2 Type Layered Sodium Cathode Material

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第11期16卷 340-358页

作者： Orynbay Zhanadilov Sourav Baiju Natalia Voronina Jun Ho Yu A.-Yeon Kim Hun‑Gi jung Kyuwook Ihm Olivier Guillon Payam Kaghazchi seung‑Taek Myung Department of Nanotechnology and Advanced Materials Engineering and Sejong Battery Institute Hybrid Materials Research CenterSejong University98 Gunja‑DongGwangjin‑GuSeoul 05006South Korea Institute of Energy and Climate Research‑Materials Synthesis and Processing(IEK‑1) Forschungszentrum Jülich GmbH52425 JülichGermany Center for Energy Storage Research Korea Institute of Science and TechnologySeoul 02792South Korea KIST‑SKKU Carbon‑Neutral Research Center Sungkyunkwan UniversitySuwon 16419South Korea Department of Energy Science Sungkyunkwan UniversitySuwon 16419South Korea Pohang Accelerator Laboratory 80 Jigokro‑127‑BeongilNam‑GuPohangGyeongbuk 37673South Korea MESA+Institute for Nanotechnology University of Twente7500 AE EnschedeThe Netherlands

This study explores the impact of introducing vacancy in the transition metal layer of rationally designed Na_(0.6)[Ni_(0.3)Ru_(0.3)Mn_(0.4)]O_(2)(NRM)cathode *** incorporation of Ru,Ni,and vacancy enhances the structural stability during extensive cycling,increases the operation voltage,and induces a capacity increase while also activating oxygen redox,respectively,in Na_(0.7)[Ni_(0.2)V_(Ni0.1)Ru_(0.3)Mn_(0.4)]O_(2)(V-NRM)*** analytical techniques including transmission electron microscopy,X-ray absorption near edge spectroscopy,operando X-ray diffraction,and operando differential electrochemical mass spectrometry are employed to assess changes in the average oxidation states and structural *** results demonstrate that V-NRM exhibits higher capacity than NRM and maintains a moderate capacity retention of 81%after 100 ***,the formation of additional lone-pair electrons in the O 2p orbital enables V-NRM to utilize more capacity from the oxygen redox validated by density functional calculation,leading to a widened dominance of the OP4 phase without releasing O_(2) *** findings offer valuable insights for the design of advanced high-capacity cathode materials with improved performance and sustainability in sodium-ion batteries.

关键词： Layered oxide Oxygen evolution Sodium battery Vacancy Cathode