检索结果-南通市图书馆

performance of polymer/cdS organic-inorganic hybrid LEDs

在线全文

学校读者我要写书评

暂无评论

Optoelectronics Letters 2016年第2期12卷 110-114页

作者： c.pradeep S.Mathew M.A.g.Namboothiry c.p.g.vallabhan p.Radhakrishnan V.p.N.Nampoori International School of photonics Cochin University of Science and Technology School of physics Indian Institute of Science Education and Research Department of Optoelectronics University of Kerala

Organic-inorganic hybrid light emitting diodes(LEDs) were fabricated by incorporating cadmium sulphide(cd S) nanoparticles in hole transporting layer and light emitting materials of a polymer LED. The cd S nanoparticles with size of 10 nm were synthesized by precipitation technique. The LEDs incorporated with the cd S nanoparticles show a reduction in turn on voltage and luminance. When the nanoparticles are incorporated in a suitable fluorene based light emitting polymer, the luminance is increased along with the decrease of turn on voltage.

关键词： inorganic incorporated transporting blend cadmium coated hexagonal filtered adding attributed

Fabrication and photostability of Rhodamine-6g gold Nanoparticle Doped polymer Optical Fiber

在线全文

学校读者我要写书评

暂无评论

chinese physics Letters 2013年第11期30卷 180-183页

作者： Suneetha Sebastian Ajina c c.p.g.vallabhan V.p.N.Nampoori p.Radhakrishnan M.Kailasnath International School of photonics Cochin University of Science and TechnologyCochin 22India

We report on fabrication of a rhodamine-6g-gold-nanoparticle doped polymer optical *** gold nanoparticle is synthesized directly into the monomer solution of the polymer using laser ablation synthesis in *** size of the particle is found from the transmission electron ***-6g is then mixed with the nanoparticle-monomer solution and optical characterization of the solution is *** is found that there is a pronounced quenching of fluorescence of rhodamine 6g due to fluorescence resonance energy *** monomer solution containing rhodamine 6g and gold nanoparticles is now made into a cylindrical rod and drawn into a polymer optical ***,the photostability is calculated with respect to the pure dye doped polymer optical fiber.

关键词： stability particle Rhodamine

Status and prospects for symmetric organic redox flow batteries

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 125-143页

作者： Md Al Raihan c.Adam Dyker Department of chemistry University of New Brunswick

As environmental concerns from fossil fuel consumption intensify, large-scale energy storage becomes imperative for the integration of renewable sources like wind, hydro, and solar with the electrical *** flow batteries, particularly those employing organic molecules, are positioned as a key technology for this purpose. This review explores the growing field of symmetric organic redox flow batteries(ORFBs) within this context. Unlike traditional asymmetric designs based on unique active materials for each electrode, symmetric ORFBs involve a single bipolar species for both electrodes. This review highlights the benefits of a symmetric design, and categorizes five distinct classes of organic bipolar molecules used in both aqueous and non-aqueous solvents. By providing a comprehensive overview of their cell cycling and performance characteristics, the strengths and weaknesses of the diverse categories of bipolar molecules are highlighted for both solvent systems, as are opportunities for future development. This should guide new research directions and advance the development of practical symmetric ORFBs.

关键词： Redox flow battery Symmetric battery Organic battery Aqueous electrolyte Non-aqueous electrolyte

projective Hilbert modules and sequential approximations

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science china Mathematics 2025年第1期 137-168页

作者： Lawrence g.Brown Huaxin Lin Department of Mathematics Purdue University Department of Mathematics East China Normal University Department of Mathematics University of Oregon Shanghai Institute for Mathematics and Interdisciplinary Sciences

We show that when A is a separable c*-algebra,every countably generated Hilbert A-module is projective（with bounded module maps as morphisms）.We also study the approximate extensions of bounded module *** the case where A is a σ-unital simple c*-algebra with strict comparison,and every strictly positive lower semicontinuous affine function on quasitraces can be realized as the rank of an element in the cuntz semigroup,we show that the cuntz semigroup is equivalent to unitarily equivalent classes of countably generated Hilbert A-modules if and only if A has stable rank one.

关键词：

同方期刊数据库

grain Size control of Semisolid A356 Alloy Manufactured by Electromagnetic Stirring

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2005年第2期21卷 219-225页

作者： p.K.Seo c.g.Kang National Research Lab of Thixo-Rheo FormingSchool of Mechanical Engineering Pusan National University Pusan 609-735 KoreaNational Research Lab of Thixo-Rheo FormingSchool of Mechanical Engineering Pusan National University Pusan 609-735 Korea

To investigate the possibility of substituting the mechanical stirring system with electromagnetic stirring (EMS) system for aluminum rheo die-casting, the EMS under the different stirring cooling conditions was carried out. It was found that in the early period of solidification, the dendrite breakages led to a fine primary phase. When dendrites grew coarsely, the effect of ripening on grain size overwhelmed that of dendrite breakage. It was also found that the high cooling rate favored large nucleation rate, and led to a fine primary phase. But high cooling rate also made the growth rate of the dendrite arm, which prevented the dendrite arm from being sheared off. Therefore there were a suitable stirring time and suitable cooling rate to obtain the best rheo die-casting structure. Qualified semisolid A356 aluminum alloy was successfully manufactured with short time EMS.

关键词： Semisolid metal process Electromagnetic stirring Rheo die-casting grain size control

Acquired sensorineural hearing loss,oxidative stress,and microRNAs

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 2513-2519页

作者： Desmond A.Nunez Ru c.guo Division of Otolaryngology–Head&Neck Surgery Department of SurgeryFaculty of MedicineThe University of British ColumbiaVancouverBCCanada Division of Otolaryngology–Head&Neck Surgery Gordon&Leslie Diamond Health Care CentreVancouver General HospitalVancouverBCCanada Faculty of Medicine–The University of British columbia VancouverBCCanada

Hearing loss is the third leading cause of human ***-related hearing loss,one type of acquired sensorineural hearing loss,is largely responsible for this escalating global health ***-induced,ototoxic,and idiopathic sudden sensorineural are other less common types of acquired hearing *** etiology of these conditions is complex and multi-fa ctorial involving an interplay of genetic and environmental *** stress has recently been proposed as a likely linking cause in most types of acquired sensorineural hearing *** non-coding RNA sequences known as microRNAs(miRNAs)have increasingly been shown to play a role in cellular hypoxia and oxidative stress responses including promoting an apoptotic *** hair cell death is a central histopathological finding in sensorineural hearing *** these cells do not regenerate in humans,it underlies the irreversibility of human age-related hearing *** EMBASE,Ovid MEDLINE,Web of Science core collection,and *** databases over the period August 1,2018 to July 31,2023 were searched with"hearing loss,""hypoxamiRs,""hypoxia,""microRNAs,""ischemia,"and"oxidative stress"text words for English language primary study publications or registered clinical *** red clinical trials known to the senior author we re also assessed.A total of 222studies were thus *** excluding duplicates,editorials,retra ctions,secondary research studies,and non-English language articles,39 primary studies and clinical trials underwent full-text *** resulted in 11 animal,in vitro,and/or human subject journal articles and 8 registered clinical trial database entries which form the basis of this narrative *** miR-34a and miR-29b levels increase with age in *** miRNAs were demonstrated in human neuroblastoma and murine cochlear cell lines to target Sirtuin 1/peroxisome proliferato r-activated receptor gamma coactivator-1-alpha(SIRT1/p gc-1α),SIRT

关键词： hearing loss hypoxia microRNAs oxidative stress sensorineural

Fabrication and properties of SiB6-B4c with phenolic Resin as a carbon Source

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2008年第1期24卷 102-104页

作者： g. c.Hwang J.Matsushita United graduate School of Science and Engineering Tokai University 1117 Kitakaname Hiratsuka 259-12921 Japan

Si-B-c ceramic composites were synthesized using SiB-6,B-4c,and phenolic resin as a carbon source by pressureless sintering in an Ar ***,the Si-B-c ceramic composites were fabricated to determine their potential for applications as high hardness and high temperature *** X-ray diffraction patterns of sintered bodies of SiB-6-B-4c with carbonized phenolic resin can be seen that SiB-6 and c changed to B-4c and *** this study,it is obtained that carbonized phenolic resin is good addition material as a reaction material comparing to carbon powder at 1683 K for 1 h by pressureless sintering in an Ar atmosphere.

关键词： Silicon boride Boron carbide phenolic resin

Electroosmotic oscillatory flow of micropolar fluid in microchannels:application to dynamics of blood flow in microfluidic devices

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2014年第6期35卷 749-766页

作者： J.c.MISRA S.cHANDRA g.c.SHIT p.K.KUNDU Department of Mathematics Institute of Technical Education and ResearchSiksha O Anusandhan University Department of Mathematics Jadavpur University

The electroosmotic flow of a micropolar fluid in a microchannel bounded by two parallel porous plates undergoing periodic vibration is studied. The equations for conservation of linear and angular momentums and gauss＇s law of charge distribution are solved within the framework of the Debye-Hückel approximation. The fluid velocity and microrotation are assumed to depend linearly on the Reynolds number. The study shows that the amplitude of microrotation is highly sensitive to the changes in the magnitude of the suction velocity and the width of the microchannel. An increase in the micropolar parameter gives rise to a decrease in the amplitude of microrotation. Numerical estimates reveal that the microrotation of the suspended microelements in blood also plays an important role in controlling the electro-osmotically actuated flow dynamics in microbio-fluidic devices.

关键词： blood flow electrohydrodynamic effect microfluidics channel flow

Evaluation of Brazilian wild Hevea germplasm for cold tolerance：genetic variability in the early mature growth

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2016年第4期27卷 755-765页

作者： g.prabhakara Rao p.c.Kole Rubber Research Institute of India KottayamKerala 686009India Institute of Agriculture Visva-Bharati UniversitySantiniketanWest Bengal 7211235India

Hevea brasiliensis is a commercially cultivated species for its natural rubber（NR） latex in South East Asian countries. To meet the ever-increasing demand, NR cultivation has been extended to non-traditional regions due to the limited scope of further expansion in traditional rubbergrowing areas in India. These areas are often confronted with various abiotic stresses, especially high and low temperatures, which cause reduction in plant growth, thereby increasing its uneconomical immaturity period. Eighteen wild Hevea accessions along with two modern clones RRII203 and pB 235 and two check clones RRIM 600 and Haiken 1 were evaluated in the early mature growth *** site was at Nagrakata, West Bengal, the sub-Himalayan cold-prone region of India. In Hevea, crop production is governed by two major factors, growth-vigor and production capacity. growth-vigor is of special importance because the production of rubber is a process linked with the early growth of the plant, which results in early tappability and early economic gains. The genotypes exhibited highly significant clonal differences（p = 0.05） for all the growth traits. Tappability percentage in the seventh year, ranged from 0.33 %（Ac 3074, Ac 3075, Ac 3293） to 89.67 %（RO 2727）. The most vigorously growing accession（RO2727） reached tappabile girth early in the seventh year when the girth of plant ranged from 22.38 cm（Ac 3293） to53.12 cm（RO 2727）. The general mean was 43.32 cm, and the similar growth trend was exhibited by these accessions in the tenth year also. Annual girth increment（cm a-1） over3 years ranged from 1.81 cm（Ac 3075） to 6.80 cm（RO2727）. The mean winter girth increment（cm a-1） over4 years ranged from 0.13 cm（Ac 3075） to 0.96 cm（RO2727） as compared to the check clone RRIM 600（1.11 cm）and Haiken 1（1.10 cm）. Wide differences between the phenotypic coefficient of variation（50.29） and genotypic coefficient of variation（24.82） were observed for winter girth increment. girth in the tenth year recorded

关键词： Hevea germplasm mature cultivated phenotypic ranged abiotic rubber accession breeding