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| 1 | Role of autophagy in prion protein-induced neurodegenerative diseases显示文摘Prion 疾病,由海绵状的退化和错误褶层的累积描绘了并且在中央神经系统聚集了 PrPSc,是致命的 neurodegenerative 和人和动物的传染混乱之一。在更早的研究,在神经原的 autophagy 液泡经常在象 Alzheimer 的家那样的 neurodegenerative 疾病被观察, Parkinson 是,并且亨廷顿是象 prion 疾病一样的疾病。Autophagy 是几个细胞质的部件(蛋白质或细胞器) 被在一个 double-membrane-bound 泡扣押的一个高度保存的 homeostatic 过程称为的 autophagosome 并且与 lysosome 在他们的熔化之上降级了。在基础生理的层次的细胞间的自我消化的小径为维持纸巾和机关的健康地位是不可缺少的。在 prion 感染的情况下,增加证据显示 autophagy 把消除病理学的 PrPSc 的一个关键能力在神经原以内积累了。相反,在影响神经原的 autophagy 机能障碍可以贡献海绵状的变化的形成。在这评论,我们在 neurodegenerative 混乱关于哺乳动物的 autophagy 的效果总结了最近的调查结果,特别地在 prion 疾病。我们也总结了一些小分子的治疗学的潜力(例如锂, rapamycin, Sirtuin 1 和 resveratrol ) 在大脑上减轻如此的疾病的目标工作。而且,我们讨论了 autophagy 的争论角色,它是否调停 neuronal 毒性或在 neurodegenerative 混乱服务保护的功能。 | Hao Yao Deming Zhao Sher Hayat Khan Lifeng Yang | 2013 | Acta Biochimica et Biophysica Sinica2013，45，6： | 65 |
| 2 | 我国小豆种质资源形态多样性鉴定与分类研究显示文摘对 2 2 4份小豆种质资源的形态多样性进行了研究鉴定 ,结果表明 ,我国小豆种质资源具有丰富的形态多样性 ,平均多样性指数为 1.0 35 ,高于国外材料 (0 .82 7) 2 0 .1%。通过多变量的主成分分析 ,第一主成分和第二主成分一共代表了小豆形态多样性的 5 6 %。基于形态性状 ,把 2 2 4份小豆种质聚类并划分为三大组群 ,第一组群 ,生育期较长 ,植株较高 ,子粒较小 ,半有限或无限生长 ,主要来源于长江中上游及西南地区 ;第二组群 ,生育期较短 ,植株较矮 ,子粒较大 ,有限生长 ,主要来源于东北及华北地区 ;第三组群的特征特性介于第一和第二组群之间 ,主要来源于华中地区。 | 王述民 曹永生 R J Redden 胡家蓬 T U sher | 2002 | 作物学报2002，28，6： | 69 |
| 3 | Optical cross-talk reduction in a quantumdot-based full-color micro-light-emitting-diode display by a lithographic-fabricated photoresist mold显示文摘In this study, a full-color emission red–green–blue(RGB) quantum-dot(QD)-based micro-light-emitting-diode(micro-LED) array with the reduced optical cross-talk effect by a photoresist mold has been demonstrated. The UV micro-LED array is used as an efficient excitation source for the QDs. The aerosol jet technique provides a narrow linewidth on the micrometer scale for a precise jet of QDs on the micro-LEDs. To reduce the optical cross-talk effect,a simple lithography method and photoresist are used to fabricate the mold, which consists of a window for QD jetting and a blocking wall for cross-talk reduction. The cross-talk effect of the well-confined QDs in the window is confirmed by a fluorescence microscope, which shows clear separation between QD pixels. A distributed Bragg reflector is covered on the micro-LED array and the QDs' jetted mold to further increase the reuse of UV light.The enhanced light emission of the QDs is 5%, 32%, and 23% for blue, green, and red QDs, respectively. | HUANG-YU LIN CHIN-WEI SHER DAN-HUA HSIEH XIN-YIN CHEN HUANG-MING PHILIP CHEN TENG-MING CHEN KEI-MAY LAU CHYONG-HUA CHEN CHIEN-CHUNG LIN HAO-CHUNG KUO | 2017 | Photonics Research2017，5，5： | 26 |
| 4 | Full-color monolithic hybrid quantum dot nanoring micro light-emitting diodes with improved efficiency using atomic layer deposition and nonradiative resonant energy transfer显示文摘Full-color displays based on micro light-emitting diodes(μLEDs) can be fabricated on monolithic epitaxial wafers. Nanoring(NR) structures were fabricated on a green LED epitaxial wafer; the color of NR-μLEDs was tuned from green to blue through strain relaxation. An Al_2O_3 layer was deposited on the sidewall of NR-μLEDs,which improved the photoluminescence intensity by 143.7%. Coupling with the exposed multiple quantum wells through nonradiative resonant energy transfer, red quantum dots were printed to NR-μLEDs for a full-color display. To further improve the color purity of the red light, a distributed Bragg reflector is developed to reuse the excitation light. | SUNG-WEN HUANG CHEN CHIH-CHIANG SHEN TINGZHU WU ZHEN-YOU LIAO LEE-FENG CHEN JIA-ROU ZHOU CHUN-FU LEE CHIH-HAO LIN CHIEN-CHUNG LIN CHIN-WEI SHER PO-TSUNG LEE AN-JYE TZOU ZHONG CHEN HAO-CHUNG KUO | 2019 | Photonics Research2019，7，4： | 23 |
| 5 | 外源一氧化氮对盐胁迫下高粱种子萌发及淀粉转化的影响显示文摘【目的】探讨外源一氧化氮(NO)对盐胁迫下高粱种子萌发过程的生理生化调节作用,为揭示甜高粱种子的萌发生理及其化学调控提供理论依据。【方法】以晋甜08-1为试材,用NaCl浓度(mmol·L-1)为0、50、100、150、200、300和400的溶液培养高粱种子,通过萌发率确定高粱种子萌发期的耐盐适宜浓度、半致死浓度和极限浓度。用0.05、0.1、0.2、0.4、0.6和0.8 mmol·L-1硝普钠(SNP,NO供体)在25℃黑暗条件下浸种12 h,以150 mmol·L-1的NaCl模拟盐胁迫,在培养36 h统计发芽势,72 h统计发芽率,在5 d时取样测定脯氨酸、丙二醛含量及淀粉转化相关指标。采用二硝基水杨酸法测定淀粉酶活性和还原性糖,蒽酮法测定可溶性糖和淀粉含量,茚三酮显色法测定脯氨酸含量,硫代巴比妥酸显色法测定丙二醛含量。通过对高粱种子发芽率、发芽势及种子吸胀、淀粉酶活性、淀粉及糖含量、脯氨酸等指标进行测定分析,研究外源一氧化氮对盐胁迫下高粱种子萌发及淀粉转化的影响。【结果】NaCl胁迫下高粱种子的萌发受到明显抑制,NaCl浓度大于100 mmol·L-1时高粱种子的萌发率显著降低,150 mmol·L-1 NaCl处理时高粱种子的萌发率为63.17%,400 mmol·L-1 NaCl完全抑制高粱种子萌发。0.05 mmol·L-1的SNP处理能够缓解盐胁迫对种子萌发的抑制,种子发芽势、发芽率、发芽指数分别比对照高14.44%、12.22%和18.07%(P<0.05);SNP处理使高粱种子中脯氨酸和可溶性糖含量分别增加18.97%和41.43%,从而降低渗透势,促进种子吸水,缓解NaCl造成的渗透胁迫,丙二醛含量显著降低,较NaCl单独处理降低了17.79%。SNP处理还能迅速提高盐胁迫下种子淀粉酶活性,在处理后第1天时就比NaCl处理提高了17.20%,加速淀粉的降解,显著增加可溶性糖和还原性糖含量。在处理的第5天时,SNP+NaCl处理淀粉含量比NaCl处理降低19.17%,可溶性糖和还原性糖的含量分别提高了41.4%和41.0%,差异显著(P<0.05),这为种子萌发提供能量,提高高粱种子萌发期的抗盐性。【结论】外源NO可调节高粱种子萌发期的淀粉酶活性和渗透调节能力,提高其对盐胁迫的抵抗能力,促进种子的萌发。 | 尹美强 王栋 王金荣 兰敏 赵娟 董淑琦 宋喜娥 ALAM Sher 原向阳 王玉国 温银元 | 2019 | 中国农业科学2019，52，22： | 18 |
| 6 | 谷子秸秆不同部位水浸液对3种杂草的化感作用显示文摘通过测定种子萌芽期生物学指标和盆栽苗期生理指标,研究谷子不同部位(叶片、茎秆)不同浓度(原液、10倍稀释液、50倍稀释液、100倍稀释液)浸提液对反枝苋、藜、狗尾草3种谷田恶性杂草的化感作用。结果表明:谷子叶片、茎秆水浸提液对3种杂草均存在显著化感作用,且不同浓度浸提液化感作用存在差异,总体表现为原液有抑制作用,稀释液(10、50、100倍)有促进作用。叶片、茎秆浸提液原液处理下,反枝苋、藜、狗尾草的发芽率分别下降了63.9%、37.3%和41.7%,根长仅为对照的27.8%、37.8%和18.4%,芽长仅为对照的34.5%、27.7%和17.6%,净光合速率为对照的66.6%、89.9%和88.2%,蒸腾速率为对照的69.0%、87.5%和56.1%,原液对3种杂草的综合化感效应指数为-0.699、-0.716和-0.795,表现出较强的化感抑制作用。稀释液处理下化感促进作用随稀释倍数增加呈先上升后下降趋势,其中50倍稀释液促进作用最强,3种杂草的发芽率、根长和芽长均与对照达到差异显著水平,综合化感效应指数分别为0.261、0.217和0.165。谷田伴生杂草大量生长与谷子秸秆中化感物质淋溶有关。 | 董淑琦 曹鹏 胡春艳 Sher Alam 原向阳 杨雪芳 郭平毅 | 2020 | 应用生态学报2020，31，7： | 18 |
| 7 | Hepatitis C virus in Pakistan:A systematic review of prevalence,genotypes and risk factors显示文摘In Pakistan more than 10 million people are living with Hepatitis C virus (HCV), with high morbidity and mortality. This article reviews the prevalence, genotypes and factors associated with HCV infection in the Pakistani population. A literature search was performed by using the keywords; HCV prevalence, genotypes and risk factors in a Pakistani population, in Pubmed, PakMediNet and Google scholar. Ninetyone different studies dating from 1994 to May 2009 were included in this study, and weighted mean and standard error of each population group was calculated. Percentage prevalence of HCV was 4.95% ± 0.53% in the general adult population, 1.72% ± 0.24% in the pediatric population and 3.64% ± 0.31% in a young population applying for recruitment, whereas a very high 57% ± 17.7% prevalence was observed in injecting drug users and 48.67% ± 1.75% in a multi-transfused population. Most prevalent genotype of HCV was 3a. HCV prevalence was moderate in the general population but very high in injecting drug users and multi-transfused populations. This data suggests that the major contributing factors towards increased HCV prevalence include unchecked blood transfusions and reuse of injection syringes. Awareness programs are required to decrease the future burden of HCV in the Pakistani population. | Yasir Waheed Talha Shafi Sher Zaman Safi Ishtiaq Qadri | 2009 | World Journal of Gastroenterology2009，15，45： | 12 |
| 8 | Geodynamic Background of Intracontinental Cenozoic Alkaline Volcanic Rocks in Laojiezi, Western Yangtze Craton: Constraints from Sr-Nd-Hf-O Isotopes显示文摘The Laojiezi alkaline volcanic rocks, which are located in the intraplate region of the Yangtze craton, coincide with the formation of the Jinshajiang-Ailaoshan-Red River alkaline rock belt. Although this belt has been widely studied by geologists because of its porphyry-related Pb-Ag-Au polymetallic deposit and geotectonic location, the material sources of this belt are still debate. Whole-rock analyses show that these rocks have high total alkali contents(3.73–11.08 wt%), and their aluminum saturation index(ASI) values widely vary from 0.82 to 3.07, which comprise a metaluminous-peraluminous magma series. These rocks are characterized by high K(K2 O/Na2 O>1) and low Ti and Mg contents; enrichment in large-ion lithophile elements, such as Rb, Ba, K and light rare earth elements; and depletion in high field strength elements, such as Ta, Nb, P, and Ti. These rocks exhibit moderate Eu(Eu/Eu*=0.86–1.04) and Ce(Ce/Ce*=0.63–0.96) anomalies. Their(87 Sr/86 Sr)i, εNd(t), zircon εHf(t) and δ18 O values range from 0.70839 to 0.71013, from-10.16 to-12.45, from-19.6 to-5.8, and from 5.69‰ to 8.54‰, respectively, and their Nd and Hf two-stage model ages(TDM2) are 1.67–1.86 Ga and 1.27–2.02 Ga, respectively. These data reflect the primary partial melting of Paleoproterozoic to Mesoproterozoic lower crust with minor residual continental lithospheric mantle and supracrustal metasediments. The lithosphere was likely thickened along the southeastern margin of the Tibetan Plateau following the Indian-Asian continentcontinent collision(65–41 Ma). During the post-collision phase(36–16 Ma), the transition from a compressional to extensional setting triggered the convective removal of the over-thickened CLM beneath the Yangtze craton, which led to the upwelling of asthenospheric materials. This process created alkali-rich and high-K magma through the partial melting of the thickened lower crust. Magma that carried Cu-Au-Pb-Ag minerals was emplaced by strike-slip motion along the E-to W-or ENE-to WSWtrending tectonically weak zone, finally forming an alkaline porphyry Cu-Au-Pb-Ag polymetallic deposit. | YAN Qinggao JIANG Xiaojun LI Chao ZHOU Limin WANG Zhongqiang Sultan Baig SHER QU Wenjun DU ANDao | 2018 | Acta Geologica Sinica(English Edition)2018，92，6： | 12 |
| 9 | Micro-light-emitting diodes with quantum dots in display technology显示文摘Micro-light-emitting diodes(μ-LEDs)are regarded as the cornerstone of next-generation display technology to meet the personalised demands of advanced applications,such as mobile phones,wearable watches,virtual/augmented reality,micro-projectors and ultrahigh-definition TVs.However,as the LED chip size shrinks to below 20μm,conventional phosphor colour conversion cannot present sufficient luminance and yield to support highresolution displays due to the low absorption cross-section.The emergence of quantum dot(QD)materials is expected to fill this gap due to their remarkable photoluminescence,narrow bandwidth emission,colour tuneability,high quantum yield and nanoscale size,providing a powerful full-colour solution for μ-LED displays.Here,we comprehensively review the latest progress concerning the implementation of μ-LEDs and QDs in display technology,including μ-LED design and fabrication,large-scale μ-LED transfer and QD full-colour strategy.Outlooks on QD stability,patterning and deposition and challenges of μ-LED displays are also provided.Finally,we discuss the advanced applications of QD-based μ-LED displays,showing the bright future of this technology. | Zhaojun Liu Chun-Ho Lin Byung-Ryool Hyun Chin-Wei Sher Zhijian Lv Bingqing Luo Fulong Jiang Tom Wu Chih-Hsiang Ho Hao-Chung Kuo Jr-Hau He | 2020 | Light(Science & Applications)2020，9，1： | 12 |
| 10 | Mesoporous Co3O4 as an electrocatalyst for water oxidation显示文摘Mesoporous Co3O4 经由一条 nanocasting 线路作为一个难模板用多孔的硅石被准备了,它的 electrocatalytic 性质为水的电解作为氧进化催化剂被调查。订的 mesostructured Co3O4 表演戏剧性地与体积 Co3O4 的相比增加了催化活动。提高的催化活动与高孔和表面被完成区域,和水氧化过电位() 当表面区域增加,订的 mesoporous, Co3O4 显著地减少。mesoporous Co3O4 也在碱的媒介显示出优秀结构的稳定性。在在 0.8 V 下面的 100 min 以后(对 Ag/AgCl ) 应用偏爱,样品与催化性质的很少释放维持订的 mesoporous 结构。 | itHarun Tueysuez Yun Jeong Hwang Sher Bahadar Khan Abdullah Mohamed Asiri Peidong Yang | 2013 | Nano Research2013，6，1： | 11 |
| 11 | Role of ZnO-CeO_2 Nanostructures as a Photo-catalyst and Chemi-sensor显示文摘ZnO-CeO2 nanostructures were synthesized by simple and effcient low temperature method. The structure and morphology of the ZnO-CeO2 nanostructures were characterized by X-ray powder diffraction (XRD) and field emission scanning electron microscopy (FESEM), which revealed elongated shaped CeO2 nanoparticles with diameters of 40-90 nm distributed on the surface of elongated ZnO nanostructures with diameters of 50-200 nm (edge-centre). Further the structure of the synthesized ZnO-CeO2 nanostructure was supported by Raman spectra and Fourier transform infrared spectroscopy (FTIR). UV-vis absorption spectrum was used to confirm the optical properties of the CeO2 doped ZnO nanostructures. Photo-catalytic activity of CeO2 doped ZnO nanostructure was evaluated by degradation of acridine orange and methylene blue which degraded 84.55% and 48.65% in 170 min, respectively. ZnO-CeO2 nanostructures also showed good sensitivity (0.8331 μA·cm-2·(mol/l)-1) in short response time (10 s) by applying to chemical sensing using ethanol as a target compound by I-V technique. These degradation and chemical sensing properties of ZnO-CeO2 nanostructures are of great importance for the application of ZnO-CeO2 system as a photo-catalyst and chemical sensor. | M. Faisal Sher Bahadar Khan Mohammed M. Rahman Aslam Jamal Kalsoom Akhtar M.M. Abdullah | 2011 | Journal of Materials Science & Technology2011，27，7： | 9 |
| 12 | Maximum Sustainable Yield Estimates of Ladypees,Sillago sihama(Forsskl),Fishery in Pakistan Using the ASPIC and CEDA Packages显示文摘Using surplus production model packages of ASPIC(a stock-production model incorporating covariates) and CEDA(Catch effort data analysis),we analyzed the catch and effort data of Sillago sihama fishery in Pakistan.ASPIC estimates the pa-rameters of MSY(maximum sustainable yield),Fmsy(fishing mortality),q(catchability coefficient),K(carrying capacity or unexploited biomass) and B1/K(maximum sustainable yield over initial biomass).The estimated non-bootstrapped value of MSY based on logistic was 598 t and that based on the Fox model was 415 t,which showed that the Fox model estimation was more conservative than that with the logistic model.The R2 with the logistic model(0.702) is larger than that with the Fox model(0.541),which indicates a better fit.The coefficient of variation(cv) of the estimated MSY was about 0.3,except for a larger value 88.87 and a smaller value of 0.173.In contrast to the ASPIC results,the R2 with the Fox model(0.651-0.692) was larger than that with the Schaefer model(0.435-0.567),indicating a better fit.The key parameters of CEDA are:MSY,K,q,and r(intrinsic growth),and the three error assumptions in using the models are normal,log normal and gamma.Parameter estimates from the Schaefer and Pella-Tomlinson models were similar.The MSY estimations from the above two models were 398 t,549 t and 398 t for normal,log-normal and gamma error distributions,re-spectively.The MSY estimates from the Fox model were 381 t,366 t and 366 t for the above three error assumptions,respectively.The Fox model estimates were smaller than those for the Schaefer and the Pella-Tomlinson models.In the light of the MSY estimations of 415 t from ASPIC for the Fox model and 381 t from CEDA for the Fox model,MSY for S.sihama is about 400 t.As the catch in 2003 was 401 t,we would suggest the fishery should be kept at the current level.Production models used here depend on the assumption that CPUE(catch per unit effort) data used in the study can reliably quantify temporal variability in population abundance,hence the mod-eling results would be wrong if such an assumption is not met.Because the reliability of this CPUE data in indexing fish population abundance is unknown,we should be cautious with the interpretation and use of the derived population and management parameters. | Sher Khan Panhwar LIU Qun Fozia Khan Pirzada J.A.Siddiqui | 2012 | Journal of Ocean University of China2012，11，1： | 9 |
| 13 | HEAT AND MASS TRANSFER EFFECTS ON CARREAU FLUID MODEL FOR BLOOD FLOW THROUGH A TAPERED ARTERY WITH A STENOSIS显示文摘 | NOREEN SHER AKBAR DBSEH CEME | 2014 | International Journal of Biomathematics2014，7，1： | 8 |
| 14 | Alumina-coated Ag nanocrystal monolayers as surfaceenhanced Raman spectroscopy platforms for the direct spectroscopic detection of water splitting reaction intermediates显示文摘 | Xing Yi Ling Ruoxue Yan Sylvia Lo Dat Tien Hoang Chong Liu Melissa A. Fardy Sher Bahadar Khan Abdullah M. Asiri Salem M. Bawaked Peidong Yang | 2014 | Nano Research2014，7，1： | 8 |
| 15 | Landslide inventory and susceptibility modelling using geospatial tools,in Hunza-Nagar valley,northern Pakistan显示文摘A comprehensive landslide inventory and susceptibility maps are prerequisite for developing and implementing landslide mitigation strategies. Landslide susceptibility maps for the landslides prone regions in northern Pakistan are rarely available. The Hunza-Nagar valley in northern Pakistan is known for its frequent and devastating landslides. In this paper, we have developed a landslide inventory map for Hunza-Nagar valley by using the visual interpretation of the SPOT-5 satellite imagery and mapped a total of 172 landslides. The landslide inventory was subsequently divided into modelling and validation data sets. For the development of landslide susceptibility map seven discrete landslide causative factors were correlated with the landslide inventory map using weight of evidence and frequency ratio statistical models. Four different models of conditional independence were used for the selection of landslide causative factors. The produced landslides susceptibility maps were validated by the success rate and area under curves criteria. The prediction power of the models was also validated with the prediction rate curve. The validation results shows that the success rate curves of the weight of evidence and the frequency models are 82% and 79%, respectively. The prediction accuracy results obtained from this study are 84% for weight of evidence model and 80% for the frequency ratio model. Finally, the landslide susceptibility index maps were classified into five different varying susceptibility zones. The validation and prediction result indicates that the weight of evidence and frequency ratio model are reliable to produce an accurate landslide susceptibility map, which may be helpful for landslides management strategies. | Alam Sher BACHA Muhammad SHAFIQUE Harald van der WERFF | 2018 | Journal of Mountain Science2018，15，6： | 8 |
| 16 | Catalytic performance of Cu-and Zr-modified beta zeolite catalysts in the methylation of 2-methylnaphthalene显示文摘2,6-Dimethylnaphthalene(2,6-DMN) is a commercially important chemical for the production of polyethylenenaphthalate and polybutylene naphthalate. However, its complex synthesis procedure and high production cost significantly reduce the use of 2,6-DMN. In this study, the synthesis of 2,6-DMN was investigated with methylation of 2-methylnaphthalene(2-MN) over metal-loaded beta zeolite catalysts including beta zeolite, Cu-impregnated beta zeolite and Zr-impregnated beta zeolite. The experiments were performed in a fixed-bed reactor at atmospheric pressure under a nitrogen atmosphere. The reactor was operated at a temperature range of 400–500 °C and varying weight hourly space velocity between 1 and 3 h^(-1).The results demonstrated that 2,6-DMN can be synthesized by methylation of 2-MN over beta type zeolite catalysts.Besides 2,6-DMN, the product stream also contained other DMN isomers such as 2,7-DMN, 1,3-DMN, 1,2-DMN and 2,3-DMN. The activity and selectivity of beta zeolite catalyst were remarkably enhanced by Zr impregnation, whereas Cu modification of beta zeolite catalyst had an insignificant effect on its selectivity. The highest conversion of 2-MN reached81%, the highest ratio of 2,6-DMN/2,7-DMN reached 2.6 and the highest selectivity of 2,6-DMN was found to be 20% by using Zr-modified beta zeolite catalyst. | Fatih Gülec Farooq Sher Ali Karaduman | 2019 | Petroleum Science2019，16，1： | 8 |
| 17 | Heat transfer analysis of viscoelastic fluid flow due to metachronal wave of cilia显示文摘 | Noreen Sher Akbar Adil Wahid Butt | 2014 | International Journal of Biomathematics2014，7，6： | 6 |
| 18 | Blood flow analysis in tapered stenosed arteries with pseudoplastic characteristics显示文摘 | Noreen Sher Akbar S. Nadeem | 2014 | International Journal of Biomathematics2014，7，6： | 5 |
| 19 | Integrated Bi2O3 nanostructure modified with Au nanoparticles for enhanced photocatalytic activity under visible light irradiation显示文摘An integrated Bi_2O_3(i-Bi_2O_3) nanostructure with a particle size 10 nm inducing agglomerated structure were synthesized by dissolving bismuth nitrate pentahydrate in diethylene glycol at 180 ℃ with post heat treatment.The prepared i-Bi_2O_3 nanostructures were employed for the construction of Au/i-Bi_2O_3 composite system and characterized by X-ray diffraction pattern,UV-visible diffuse reflectance spectroscopy(DRS),and transmission electron microscopy,X-ray photoemission spectroscopy(XPS) and Energy dispersive X-ray spectroscopy(EDS).The i-Bi_2O_3 nanostructure and Au/i-Bi_2O_3 composite system were found to exhibit high photocatalytic activity than commercial Bi_2O_3 in decomposing salicylic acid under visible light irradiation.The high catalytic activity of i-Bi_2O_3 nanostructure was deduced to be caused by charge separation facilitated by electron hopping between the particles within the integrated structure and space-charge separation between i-Bi_2O_3 and Au.The charge separation behavior in i-Bi_2O_3 nanostructure was further bolstered by comparing the measured.OH radical produced in the solution with i-Bi_2O_3 nanostructure,commercial Bi_2O_3 and Au/i-Bi_2O_3 composite which readily react with 1,4-terephthalic acid(TA) inducing 2-hydroxy terephthalic acid(TAOH) that shows unique fluorescence peak at 426 nm.The space-charge separation between i-Bi_2O_3 and An was confirmed by measuring the electron spin resonance(ESR) spectra. | Hankwon Lim Sher Bahadur Rawal | 2017 | Progress in Natural Science:Materials International2017，27，3： | 5 |
| 20 | Radiation efects on MHD stagnation point flow of nano fluid towards a stretching surface with convective boundary condition显示文摘The aim of the present paper is to study the numerical solutions of the steady MHD two dimensional stagnation point flow of an incompressible nano fluid towards a stretching cylinder.The effects of radiation and convective boundary condition are also taken into account.The model used for the nanofluid incorporates the effects of Brownian motion and thermophoresis.The resulting nonlinear momentum,energy and nano particle equations are simplifed using similarity transformations.Numerical solutions have been obtained for the velocity,temperature and nanoparticle fraction profles.The influence of physical parameters on the velocity,temperature,nanoparticle fraction,rates of heat transfer and nanoparticle fraction are shown graphically. | Noreen Sher Akbar S.Nadeem Rizwan Ul Haq Z.H.Khan | 2013 | Chinese Journal of Aeronautics2013，26，6： | 5 |
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