检索结果-南通市图书馆

Carbon Reduction Programs and Key Technologies in Global Steel Industry

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2014年第3期21卷 275-281页

作者： Jian-xun FU Guo-hao TANG Ren-jie ZHAO Weng-sing.HWANG Key Laboratory of Modern Metallurgy and Materials Processing Shanghai University Department of Materials Science and Engineering Research Center for Energy Technology and StrategyNationalCheng Kung University

Greenhouse gases, particularly the carbon dioxide, cause global warming and extreme weather, which has become a serious threat to human beings. The steel industry creates enormous amounts of carbon emission and has tremendous potential in carbon reduction. Considering the consistently increasing.demand of iron and steel, to obtain significant carbon reduction by reducing the steel production is not practical, thus the development and implementa- tion of carbon reduction programs and technologies is important for the steel industry. Despite the significant poten- tial of carbon reduction in the steel industry, ironmaking and steelmaking processes are complex. Therefore, resear- ches and developments for the carbon reduction must focus on key processes. Here, key processes and technologies adopted in ULCOS program in EU, COURSE 50 program in Japan, POSCO program in South Korea, AISI pro- grams in US and other carbon reduction programs are summarized and evaluated, and feasible suggestions for carbon reduction in developing countries are presented. If effective measures can be referred to and taken in developing coun- tries, global carbon emission can be greatly reduced.

关键词： steel industry C02 carbon reduction program carbon reduction technology

Novel bipolar host for highly efficient green,yellow,orange,red and deep-red phosphorescent organic light-emitting devices

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2017年第4期60卷 504-509页

作者： Cai-Jun Zheng Chuan-Lin Liu Kai Wang Si-Lu Tao Hui Lin Chun-sing.Lee School of Optoelectronic Information University of Electronic Science and Technology of China Nano-organic Photoelectronic Laboratory Key Laboratory of Photochemical Conversion and Optoelectronic MaterialsTechnical Institute of Physics and ChemistryChinese Academy of Sciences Center of Super-Diamond and advanced Films Department of Biology and ChemistryCity University of Hong Kong

A novel bipolar host tris(4-(pyrimidin-5-yl)phenyl)amine(TPMTPA) constructed by incorporating triphenylamine as the electron-donating core and pyrimidine as the electron-accepting peripheries was designed and *** achieves excellent bipolar charge transport properties and has high enough triplet energy level to sensitize green,yellow,orange,red and deep-red *** using.TPMTPA as a host,high performance green,yellow,orange,red and deep-red phosphorescent organic light-emitting devices(PhOLEDs) were demonstrated with maximum external quantum efficiencies of 20.4%,17.6%,15.1%,15.3%and 15.7%*** results suggested that TPMTPA is a versatile high performance host for PhOLEDs of different emission colors.

关键词： host phosphorescence organic light-emitting device bipolar

Composition-dependent ultra-high photoconductivity in ternary CdSxSe1-x nanobelts as measured by optical pump-terahertz probe spectroscopy

在线全文

学校读者我要写书评

暂无评论

Nano Research 2013年第11期6卷 808-821页

作者： Hongwei Liu Junpeng Lu Minrui Zheng sing.Hai Tang Xinhai Zhang Chorng Haur Sow Department of Physics 2 Science Drive 3 National University of Singapore 117542 Singapore Institute of Materials Research and Engineering Agency for Science Technology and Research (A'STAR) 3 Research Link 117502 Singapore

We employ optical pump-terahertz probe spectroscopy to investigate the composition-dependent photoconductivity in ternary CdSxSel_x nanobelts. The observed carrier dynamics of CdS nanobelts display much shorter lifetime than those of ternary CdSKSel_K nanobelts. This indicates the implementation of CdS nanobelts as ultrafast switching devices with a switching speed potentially up to 46.7 GHz. Surprising.y, ternary CdS,-Sel_x nanobelts are found to exhibit much higher photoconductivity than binary CdS and CdSe. This is attributed to the higher photocarrier densities in ternary compounds. In addition, the presence of Se in samples resulted in prominent CdSe-like transverse optical （TO） phonon modes due to electron-phonon interactions. The strength of this mode shows a large drop upon photoexcitation but recovers gradually with time. These results demonstrated that growth of ternary nanostructures can be utilized to alleviate the high surface defect density in nanostructures and improve their photoconductivity.

关键词： nanomaterials andnanostructures optical materials photoconductivity ternary alloys THz spectroscopy

Prevention of ischemic stroke in diabetic patients

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国现代神经疾病杂志 2013年第4期13卷 257-262页

作者： Duan Jian-gang Chen Xiang-yan Wong Ka-sing Department of Medicine and Therapeutics Chinese University of Hong Kong Prince of Wales Hospital Department of Neurology Tianjin Huanhu Hospital

糖尿病可使发生缺血性卒中的风险增加2倍以上,并且合并缺血性卒中的糖尿病患者长期预后不良。目前所采取的强力降血糖治疗并未使糖尿病患者从缺血性卒中的一级和二级预防中获益。然而,有研究显示,具有针对性的缺血性卒中危险因素管理,... 详细信息

糖尿病可使发生缺血性卒中的风险增加2倍以上,并且合并缺血性卒中的糖尿病患者长期预后不良。目前所采取的强力降血糖治疗并未使糖尿病患者从缺血性卒中的一级和二级预防中获益。然而,有研究显示,具有针对性的缺血性卒中危险因素管理,特别是对不良生活方式、血糖、高血压、脂质代谢紊乱的干预,可预防糖尿病患者缺血性卒中的发生,并改善预后。在符合干预标准的糖尿病患者中,抗血栓治疗和颈动脉外科手术对缺血性卒中的一级和二级预防是必要的。本文拟对近年公布的糖尿病患者缺血性卒中一级和二级预防的相关证据进行概述,使临床医师了解该领域的研究现状与动态,从而更好地实施糖尿病患者的卒中预防措施。

关键词：脑缺血卒中预防糖尿病

Hearing loss and tinnitus associated with COVID-19 vaccines:An analysis from the national pharmacovigilance database in Malaysia

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2023年第7期16卷 289-295,I0002-I0004页

作者： sing.Chet Lee Wee Kee Wo Hee Sheong Yeoh Sim Mei Choo Azuana Ramli National Pharmaceutical Regulatory Agency(NPRA) Ministry of HealthMalaysia

Objective:To compare the reporting pattern of hearing loss and tinnitus across different vaccines brands used in Malaysia(BNT162b2,CoronaVac,ChadOx1,***2-S and BBIBP-CorV).Methods:This retrospective study included all reports of hearing loss and tinnitus occurring after COVID-19 vaccination that were received in the national pharmacovigilance database,QUEST,from February 24,2021 through July 31,*** given causality consistent or indeterminate were ***:There were 21 cases of hearing loss,with overall reporting rate of 0.29 cases per million *** rate was similar across BNT162b2,CoronaVac and *** tinnitus,35 cases were reported,with the overall reporting rate of 0.49 cases per million doses,and the highest rate was reported for *** both events,most cases aged 30 to 49 *** gender disparity was *** events were mainly reported to have occurred after the primary doses,with a median time-to-onset of two *** were no statistically significant differences in the reporting patterns for both events across BNT162b2,CoronaVac and ChadOx1 by age group,gender,race,and dose ***:Despite the low reporting rates and insufficient evidence to confirm its relationship,hearing loss and tinnitus following vaccinations should not be ignored due to its disabling potential and impact on one’s quality of *** reporting is encouraged for better signal characterization in the future.

关键词： COVID-19 vaccines Hearing loss Tinnitus adverse events following immunization

Highly stable organic fluorescent nanorods for living- cell imaging

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 Research 2015年第7期8卷 2380-2389页

作者： Minhuan Lan Jinfeng Zhang Xiaoyue Zhu Pengfei Wang Xianfeng Chen Chun-sing.Lee Wenjun Zhang Center of Super-Diamond and advanced Films (COSDAF) Department of Physics and Materials Science City University of Hong Kong Hong Kong SAR China Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry (TIPC) Chinese Academy of Sciences (CAS) Beijing 100190 China These authors contributed equally to this work.

Metal-free, organic-dye-based fluorescent nanorods were fabricated through a simple solvent-exchange procedure. The as-prepared nanorods exhibit low toxicity to living cells and excellent photostability. Furthermore, they are stable in solutions of various pHs and high ionic strength and in solutions with interfering metal ions. Compared with the free DPP-Br molecules in THF, these nanorods exhibit larger Stokes shift, broader absorption spectra, and greatly improved photostability. We successfully demonstrated the application of the nanorods, including their aforementioned beneficial characteristics, as a good fluorescence probe for bio-imaging.

关键词： cell imaging organic dye, fluorescent nanorods, DPP

Berberine induces cell cycle arrest and apoptosis in human gastric carcinoma SNU-5 cell line

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 Gastroenterology 2006年第1期12卷 21-28页

作者： Jing-Pin Lin Jai-sing.Yang Jau-Hong Lee Wen-Tsong Hsieh Jing-Gung Chung School of Chinese Medicine China MedicalUniversity Taichung City 404 Taiwan China Department of Medical Technology Yuan-PeiUniversity of Science and Technology Hsinchu City 300 TaiwanChina Department of Surgery China Medical UniversityHospital Taichung City 404 Taiwan China Department of Pharmacology China MedicalUniversity Taichung City 404 Taiwan China Department of Microbiology School ofBiological Science and Technology China Medical UniversityTaichung City 404 Taiwan China

AIM： To investigate the relationship between the inhibited growth （cytotoxic activity） of berberine and apoptotic pathway with its molecular mechanism of action. METHODS： The in vitro cytotoxic techniques were complemented by cell cycle analysis and determination of sub-G1 for apoptosis in human gastric carcinoma SNU-5 cells. Percentage of viable cells, cell cycle, and sub431 group （apoptosis） were examined and determined by the flow cytometric methods. The associated proteins for cell cycle arrest and apoptosis were examined by Western blotting. RESULTS： For SNU-5 cell line, the IC （50） was found to be 48 μmol/L of berberine. In SNU-5 cells treated with 25-200 μmol/L berberine, G2/M cell cycle arrest was observed which was associated with a marked increment of the expression of p53, Wee1 and CDk1 proteins and decreased cyclin B. A concentration-dependent decrease of cells in G0/G1 phase and an increase in G2/M phase were detected. In addition, apoptosis detected as sub-Go cell population in cell cycle measurement was proved in 25-200 μmol/L berberine-treated cells by monitoring the apoptotic pathway. Apoptosis was identified by sub-Go cell population, and upregulation of Bax, downregulation of Bcl-2, release of Ca^2＋, decreased the mitochondrial membrane potential and then led to the release of mitochondrial cytochrome C into the cytoplasm and caused the activation of caspase-3, and finally led to the occurrence of apoptosis. CONCLUSION： Berberine induces p53 expression and leads to the decrease of the mitochondrial membrane potential, Cytochrome C release and activation of caspase-3 for the induction of apoptosis.

关键词： Berberine Cell cycle Apoptosis Caspase-3 ROS MMP SNU-5 cells

A monolithic InP/SOI platform for integrated photonics

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Light(Science & Applications) 2021年第11期10卷 2143-2152页

作者： Zhao Yan Yu Han Liying Lin Ying Xue Chao Ma Wai Kit Ng Kam sing.Wong Kei May Lau Department of Electronic and Computer Engineering Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina Department of Physics and William Mong Institute of Nano Science and Technology Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina

The deployment of photonic integrated circuits(PICs)necessitates an integration platform that is scalable,high-throughput,cost-effective,and *** we present a monolithic InP on SOI platform to synergize the advantages of two mainstream photonic integration platforms:Si photonics and InP *** monolithic InP/SOI platform is realized through the selective growth of both InP sub-micron wires and large dimension InP membranes on industry-standard(001)-oriented silicon-on-insulator(SOI)*** epitaxial InP is in-plane,dislocation-free,site-controlled,intimately positioned with the Si device layer,and placed right on top of the buried oxide layer to form“InP-on-insulator”.These attributes allow for the realization of various photonic functionalities using.the epitaxial InP,with efficient light interfacing between the III-V devices and the Si-based *** exemplify the potential of this InP/SOI platform for integrated photonics through the demonstration of lasers with different cavity designs including subwavelength wires,square cavities,and *** results here mark a critical step forward towards fully-integrated Si-based PICs.

关键词： SOI monolithic integration

Air-Stable Ultrabright Inverted Organic Light-Emitting Devices with Metal Ion-Chelated Polymer Injection Layer

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 2022年第1期14卷 239-249页

作者： Shihao Liu Chunxiu Zang Jiaming Zhang Shuang Tian Yan Wu Dong Shen Letian Zhang Wenfa Xie Chun-sing.Lee State Key Laboratory of Integrated Optoelectronics College of Electronics Science and EngineeringJilin University2699 Qianjin StreetChangchun 130012People’s Republic of China Department of Chemistry Center of Super-Diamond and Advanced Films(COSDAF)City University of Hong KongKowloonHong KongPeople’s Republic of China

Here,this work presents an air-stable ultrabright inverted organic lightemitting device(OLED)by using.zinc ionchelated polyethylenimine(PEI)as electron injection *** zinc chelation is demonstrated to increase the conductivity of the PEI by three orders of magnitude and passivate the polar amine *** these physicochemical properties,the inverted OLED shows a record-high external quantum efficiency of 10.0% at a high brightness of 45,610 cd m^(-2) and can deliver a maximum brightness of 121,865 cd m^(-2).Besides,the inverted OLED is also demonstrated to possess an excellent air stability(humidity,35%)with a half-brightness operating time of 541 h@1000 cd m^(-2) without any protection nor encapsulation.

关键词： Air stability Ultrabright Electron injection Metal ion chelation Inverted organic light-emitting device