检索结果-南通市图书馆

复旦学报（自然科学版） 2007年第5期46卷 839-页

作者： P.Raghvan j.Manuel G.Cheruvally j.h.ahn Department of Chemical and Biological Engineering and ITRC for Energy Storage and Conversion Gyeongsang National University 900 Gajwa-dongJinju 660-701Republic of Korea

1 Results Electrospinning has attracted immense attention recently as a versatile and easy method to prepare polymer membranes that are made up of thin fibers of micron and sub-micron *** membranes are particularly suitable as host matrices for polymer electrolytes (PEs) since the interlaying of fibers generate large porosity with fully interconnected pore structure facilitating the easy transport of *** of PEs based on electrospun membranes of poly(vinylidene fluoride) (PVd...

关键词： electrospinning polymer electrolytes fibrous membranes: lithium batteries

Maximizing biomass utilization: An integrated strategy for coproducing multiple chemicals

在线全文

学校读者我要写书评

暂无评论

journal of Energy Chemistry 2025年第1期100卷 180-191页

作者： Byeongchan ahn Sua jo jonggeol Na j.jay Liu Young-ju Kim Wangyun Won Department of Chemical and Biological Engineering Korea University Department of Chemical Engineering (Integrated process) Kyung Hee University Department of Chemical Engineering and Materials Science Ewha Womans University Department of Chemical Engineering Pukyong National University Resources Engineering Plant Research Department Korea Institute of Geoscience and Mineral Resources

Lignocellulosic biomass is one of the viable solutions to alleviate the global warming. however, the limited utilization of biomass majorly focused on cellulose and hemicellulose restricts the economic and environmental feasibilities. To cope with this issue, we proposed an integrated process of co-producing 1,6-hexanediol（1,6-hDO） with tetrahydrofuran and adipic acid from biomass, referred to as Strategy A. To compare the impacts of lignin upgrading and feedstock, Strategy B, which co-produces tetrahydrofuran alone, and Strategy C, which is the traditional route to produce 1,6-hDO from fossil fuels, were used. heat networks are also designed to reduce operating costs and indirect carbon emissions due to energy consumption, saving 87% and 83% of the heat and cooling requirements, respectively, in Strategy A. The market competitiveness of Strategy A was evaluated by determining the minimum selling price through techno-economic analysis, and sustainability was thoroughly investigated by quantifying the environmental impacts through both midpoint and endpoint life-cycle assessments（LCAs）.Strategy A was found to be the most favorable both economically（USRDSChARDOLLAR3,402/ton） and environmentally（-26.9 kg CO2eq.）. This indicates that lignin valorization is not only economically but also environmentally preferred. Finally, changes in economic and environmental feasibilities depending on economic, process, and environmental parameters were investigated using sensitivity and uncertainty analyses. The results of these analyses provide valuable insight into bio-based chemical production.

关键词： Biorefinery Carbon mitigation Climate change Global warming Lignin utilization Bioeconomy

Prominent cycling reversibility and kinetics enabled by CaTiO3 protective layer on Zn metal for aqueous Zn-ion batteries

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

journal of Energy Chemistry 2025年第1期100卷 245-258页

作者： Gaeun Lee Yong Nam ahn Seongjoon So Chanwoo Park jong-Seong Bae Taehyun Park Il Tae Kim jaehyun hur School of Chemical Biological and Battery Engineering Gachon University Seongnam Busan Center Korea Basic Science Institute

Aqueous Zn-ion batteries （AZIBs） have received considerable attention owing to their various advantages such as safety,low cost,simple battery assembly conditions,and high ionic ***,they still suffer from serious problems,including uncontrollable dendrite growth,corrosion,hydrogen evolution reaction （hER） from water decomposition,electrode passivation,and unexpected *** creation of a uniform artificial nanocrystal layer on the Zn anode surface is a promising strategy for resolving these ***,we propose the use of a perovskite CaTiO3（CTO） protective layer on Zn（CTO@Zn） as a promising approach for improving the performance of *** CTO artificial layer provides an efficient pathway for Zn ion diffusion towards the Zn metal because of the high dielectric constant （εr=180） and ferroelectric characteristics that enable the alignment of dipole moments and redistribute the Zn2+ions in the CTO *** avoiding the direct contact of the Zn anode with the electrolyte solution,the uneven dendrite growth,corrosion,parasitic side reactions,and hER are mitigated,while CTO retains its mechanical and chemical robustness during ***,CTO@Zn demonstrates an improved lifespan in a symmetric cell configuration compared with bare ***@Zn shows steady overpotential （～68 m V） for 1500 h at 1 mA cm-2/0.5 mA h cm-2,excelling bare ***,when paired with the V2O5-C cathode,the CTO@Zn//V2O5-C full battery delivers 148.4 mA h g-1（based on the mass of the cathode） after 300 *** study provides new insights into Zn metal anodes and the development of high-performance AZIBs.

关键词： Artificial layer Dielectric constant Zn metal anode Zinc aqueous battery

膝关节不全脱位的3 T MRI诊断:三维各向同性质子加权序列与二维序列的对比

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

国际医学放射学杂志 2010年第1期 83-83页

作者： j.Y.jung Y.C.Yoon j.W.Kwon j.h.ahn B.K.Choe 李志明 Department of Radiology Samsung Medical CenterSchool of MedicineSungkyunkwan University

目的比较3.0T MR的三维各向同性快速自旋回波质子加权MRI对比二维快速自旋回波MRI在诊断膝关节不全脱位中的价值。材料与方法这项符合hIPAA要求的研究获得伦理审查委员会的批准,免除知情同意的要求。回顾性复习来自85例病人的87个膝关节... 详细信息

目的比较3.0T MR的三维各向同性快速自旋回波质子加权MRI对比二维快速自旋回波MRI在诊断膝关节不全脱位中的价值。材料与方法这项符合hIPAA要求的研究获得伦理审查委员会的批准,免除知情同意的要求。回顾性复习来自85例病人的87个膝关节MRI资料,所有病人同时接受三维各向同性序列和二

关键词： T MRI 膝关节二维序列不全脱位半脱位质子核子

德奎尔万氏病(桡骨茎突狭窄性腱鞘炎):超声检查识别第一伸肌间室的解剖变异-尤其是亚间室

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

国际医学放射学杂志 2011年第5期 487-487页

作者： S.j.Choi j.h.ahn Y.j.Lee D.S.Ryu j.h.Lee S.M.jung 蔡兆诚 Departments of Radiology Asan FoundationGangneung Asan HospitalUniversity of Ulsan College of Medicine415 BangdongriSacheon-MyeonGangneung-siGangwon-do 210-711Korea

目的证实超声(US)检测德奎尔万氏病病人腕关节第一伸肌间室解剖变异的实用性。材料与方法本研究经机构审查委员会批准,无需知情同意。13例经临床诊断为德

关键词：间室腕关节超声检查解剖变异伸肌

CO_2 laser-micro plasma arc hybrid welding for galvanized steel sheets

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2011年第A1期21卷 47-53页

作者： C.h.KIM Y.N.ahn j.h.KIM Advance Welding & joining Research Group Korea Institute of Industrial Technology Incheon 406-840 South Korea

A laser lap welding process for zinc-coated steel has a well-known unsolved problem-porosity formation. The boiling temperature of coated zinc is lower than the melting temperature of the base metal, which is steel. In the autogenous laser welding, the zinc vapor generates from the lapped surfaces expels the molten pool and the expulsion causes numerous weld defects, such as spatters and blow holes on the weld surface and porosity inside the welds. The laser-arc hybrid welding was suggested as an alternative method for the laser lap welding because the arc can preheat or post-beat the weldment according to the arrangement of the laser beam and the arc. CO2 laser-micro plasma hybrid welding was applied to the lap welding of zinc-coated steel with zero-gap. The relationships among the weld quality and process parameters of the laser-arc arrangement, and the laser-arc interspacing distance and arc current were investigated using a full-factorial experimental design. The effect of laser-arc arrangement is dominant because the leading plasma arc partially melts the upper steel sheets and vaporizes or oxidizes the coated zinc on the lapped surfaces. Compared with the result from the laser-TIG hybrid welding, the heat input from arc can be reduced by 40%.

关键词： galvanized steel CO2 laser micro plasma hybrid welding

Apples to oranges:environmentally derived,dynamic regulation of serotonin neuron subpopulations in adulthood?

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第9期20卷 2596-2597页

作者： Christopher j.O’Connell Matthew j.Robson Department of Genetics College of MedicineHarvard UniversityBostonMAUSA james L.Winkle College of Pharmacy Division of Pharmaceutical SciencesUniversity of CincinnatiCincinnatiOHUSA Neuroscience Graduate Program College of MedicineUniversity of CincinnatiCincinnatiOHUSA

Traumatic brain injury(TBI)is a public health problem with an undue economic burden that impacts nearly every age,ethnic,and gender group across the globe(Capizzi et al.,2020).TBIs are often sustained during a dynamic range of exposures to energetic environmental forces and as such outcomes are typically heterogeneous regarding severity and pathology(Capizzi et al.,2020).

关键词： sustained orange dynamic

An efficient Biginelli one-pot synthesis of new benzoxazole-substituted dihydropyrimidinones and thiones catalysed by trifluoro acetic acid under solvent-free conditions

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2009年第9期20卷 1059-1061页

作者： D.Shobha M.Adharvana Chari K.h.ahn Department of Applied Chemistry Kyung Hee UniversitySuwonYongin-siSouth Korea

An efficient synthesis of benzoxazole-substituted 3,4-dihydropyrimidinones （DhPMs） using trifluoro acetic acid as the catalyst for the first time from an aldehyde, 13-keto ester and benzoxazole-substituted urea/thiourea under solvent-free conditions is described. Compared to the classical Biginelli reaction conditions, this new method consistently has the advantage of excellent yields （80-91%） and short reaction time （40-130 min） at reflux temperature. 2009 M. Adharvana Chad. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： Dihydropyrimidinones Trifluoro acetic acid Benzoxazole-substituted urea and thiourea

Temporal dynamics of neonatal hypoxic-ischemic encephalopathy injuries on magnetic resonance imaging

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第11期20卷 3144-3150页

作者： holly Flyger Samantha j.holdsworth Alistair j.Gunn Laura Bennet hamid Abbasi Mātai Medical Research Institute Tairāwhiti GisborneNew Zealand Department of Anatomy&Medical Imaging Faculty of Medical and Health SciencesThe University of AucklandAucklandNew Zealand Center for Brain Research The University of AucklandAucklandNew Zealand Auckland Bioengineering Institute The University of AucklandAucklandNew Zealand

Moderate to severe perinatal hypoxic-ischemic encephalopathy occurs in~1 to 3/1000 live births in high-income countries and is associated with a significant risk of death or neurodevelopmental *** assessment is important to help identify highrisk infants,to help families,and to support appropriate interventions.A wide range of monitoring tools is available to assess changes over time,including urine and blood biomarkers,neurological examination,and *** present,magnetic resonance imaging is unique as although it is expensive and not suited to monitoring the early evolution of hypoxic-ischemic encephalopathy by a week of life it can provide direct insight into the anatomical changes in the brain after hypoxic-ischemic encephalopathy and so offers strong prognostic information on the long-term outcome after hypoxic-ischemic *** review investigated the temporal dynamics of neonatal hypoxic-ischemic encephalopathy injuries,with a particular emphasis on exploring the correlation between the prognostic implications of magnetic resonance imaging scans in the first week of life and their relationship to long-term outcome prediction,particularly for infants treated with therapeutic hypothermia.A comprehensive literature search,from 2016 to 2024,identified 20 pertinent *** review highlights that while the optimal timing of magnetic resonance imaging scans is not clear,overall,it suggests that magnetic resonance imaging within the first week of life provides strong prognostic *** challenges limit the timing consistency,particularly the need for intensive care and clinical ***,although most reports examined the prognostic value of scans taken between 4 and 10 days after birth,there is evidence from small numbers of cases that,at times,brain injury may continue to evolve for weeks after *** suggests that in the future it will be important to explore a wider range of times after hypo

关键词： magnetic resonance imaging neonatal hypoxic-ischemic encephalopathy neurodevelopmental outcomes prognostic biomarkers in neuroimaging scan timing therapeutic hypothermia