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| 1 | Deep ultraviolet light-emitting diodes based on a well-ordered AlGaN nanorod array显示文摘The nanorod structure is an alternative scheme to develop high-efficiency deep ultraviolet light-emitting diodes(DUV LEDs). In this paper, we first report the electrically injected 274-nm AlGaN nanorod array DUV LEDs fabricated by the nanosphere lithography and dry-etching technique. Nanorod DUV LED devices with good electrical properties are successfully realized. Compared to planar DUV LEDs, nanorod DUV LEDs present>2.5 times improvement in light output power and external quantum efficiency. The internal quantum efficiency of nanorod LEDs increases by 1.2 times due to the transformation of carriers from the exciton to the free electron–hole, possibly driven by the interface state effect of the nanorod sidewall surface. In addition, the nanorod array significantly facilitates photons escaping from the interior of LEDs along the vertical direction, contributing to improved light extraction efficiency. A three-dimensional finite-different time-domain simulation is performed to analyze further in detail the TE-and TM-polarized photon extraction mechanisms of the nanostructure. Our results demonstrate the nanorod structure is a good candidate for high-efficiency DUV emitters. | LIANG ZHANG YANAN GUO JIANCHANG YAN QINGQING WU YI LU ZHUOHUI WU WEN GU XUECHENG WEI JUNXI WANG JINMIN LI | 2019 | Photonics Research2019，7，9： | 8 |
| 2 | Analysis on promoter elements of cpc operon from Arthrospira platensis显示文摘On the basis of bioinformatics analysis,six putative promoters were isolated from the upstream sequence of c-phycocyanin gene of Arthrospira platensis FACHB341 through site-directed mutagenesis,and the transcriptional pattern of c-phycocyanin gene was determined by SmartRace. Results showed that each isolated promoter drived the expression of gfp in E.coli,and Promoter Ⅲ was the strongest one according to the GFP level. Only one transcript of c-phycocyanin gene was found under experimental conditions,and the transcription start site G was located at the -285 bp upstream of the start codon,from which it could be inferred that the transcript was from the promotion of Promoter Ⅰ. | LU Yongzhong ZHANG Xuecheng | 2008 | Acta Oceanologica Sinica2008，27，1： | 2 |
| 3 | Study of the morphology evolution of AlN grown on nanopatterned sapphire substrate显示文摘This study focused on the evolution of growth front about AlN growth on nano-patterned sapphire substrate by metal-organic chemical vapor deposition.The substrate with concave cones was fabricated by nano-imprint lithography and wet etching.Two samples with different epitaxy procedures were fabricated,manifesting as two-dimensional growth mode and three-dimensional growth mode,respectively.The results showed that growth temperature deeply influenced the growth modes and thus played a critical role in the coalescence of AlN.At a relatively high temperature,the AlN epilayer was progressively coalescence and the growth mode was two-dimensional.In this case,we found that the inclined semi-polar facets arising in the process of coalescence were{112^-1}type.But when decreasing the temperature,the{112^-2}semi-polar facets arose,leading to inverse pyramid morphology and obtaining the three-dimensional growth mode.The 3 D inverse pyramid AlN structure could be used for realizing 3 D semi-polar UV-LED or facet-controlled epitaxial lateral overgrowth of AlN. | Zhuohui Wu Jianchang Yan Yanan Guo Liang Zhang Yi Lu Xuecheng Wei Junxi Wang Jinmin Li | 2019 | Journal of Semiconductors2019，40，12： | 2 |
| 4 | Temperature Influences on the Expression of GFP Promoted by the Upstream Sequence of cpcB from Arthrospira platensis显示文摘In order to investigate the regulation mechanism of the phycocyanin gene,a series of functional analyses of the upstream sequence of cpcB gene from Arthrospira platensis were conducted in E. coli with green fluorescent protein encoding gene(gfp) as the reporter. Results showed that the gfp gene could express at a high level under the promotion of the upstream sequence,suggesting the existence of some strong promoter elements in it. The expression of GFP was influenced by temperature. Higher temperature led to higher expression level. The bioinformatics analyses followed by mutation analyses on the secondary structure of translation ini-tiation region(TIR) revealed that RNA thermosensor might account for the temperature regulation. | LU Yongzhong ZHANG Xuecheng | 2007 | Journal of Ocean University of China2007，6，3： | 1 |
| 5 | Preface显示文摘The serious air pollution problems in China have significantly affected the development of China’s economy and society,especially in key areas such as Beijing-Tianjin-Hebei,Yangtze River Delta,and Pearl River Delta,which has aroused widespread concern throughout society.With the launch of the MOST(Ministry Of Science and Technology)key project for Air Pollution Formation Mechanism and Control Technology during the 13thFive-Year Plan. | Keding Lu Youwen Sun Xuecheng Wu Miaomiao Cheng Lei Duan | 2023 | Journal of Environmental Sciences2023，，1： | 1 |
| 6 | Effect and Risk Assessment of Animal Manure Pollution on Huaihe River Basin, China显示文摘Currently the deteriorated water quality for Huaihe River Basin(HRB) in China was still serious because of the negative influence multiple pollution sources including animal manure. However, little attention was paid to the potential risk of animal manure for farmland and water quality of HRB. This study was quantified and forecasted animal manure risk and its spatiotemporal variations in HRB from 2008 to 2018, through pollution discharge coefficient method and pollution load calculation, combined with kriging interpolation method of ArcGIS technology, based on statistics principle. All the data were originated from livestock and poultry breeding in HRB from 2008 to 2018. The future risk of farmland and water environment in HRB was further forecasted. The results indicated that the livestock and poultry manure has become a key pollution source causing a negative influence on farmland and water quality owing to a large amount of animal manure production without efficient recycle utilization. The chemical oxygen demand(COD) and total nitrogen(TN) discharge of animal manure in HRB almost accounted for 17.00% and 39.00% of the whole COD and TN discharge in China. The diffusion concentration of TN and TP in those regions of Shangqiu, Zhoukou, Heze, Zhumadian, Luohe, Jining, Xuchang,Kaifeng, Taian and Zhengzhou of HRB has exceeded the threshold value 10.00 mg/L of TN and 0.08 mg/L of TP, causing water eutrophication and cancer villages. The assessment of farmland and water quality risk revealed that Zhumadian, Zhoukou, Shangqiu, Taian, Jining, Heze, Linyi and Rizhao belonged to high risk areas in HRB, which were still obtained high farmland and water quality risk index in 2030. The results provided insight into an important significance of sustainable balance of livestock and poultry development and ecosystem in HRB. | WANG Youbao PAN Fanghui CHANG Jiayue WU Rongkang TIBAMBA Matthew LU Xuecheng ZHANG Xinxi | 2021 | Chinese Geographical Science2021，31，4： | 0 |
| 7 | Technology development and cost analysis of multiple pollutant abatement for ultra-low emission coal-fired power plants in China显示文摘The implementation of ultra-low emission(ULE)limits(SO_(2):35 mg/m3,NOx:50 mg/m3,PM:10 mg/m3)promoted the development of flue gas treatment technologies in China.Pollutant control technology development for Chinese coal-fired power plants was summarized and an analysis of the applicability and cost of pollutant control technologies was conducted.Detailed data were collected from 30 ultra-low emission coal-fired units across China.Based on a cost analysis model,the average unit power generation incremental costs were 0.0144and 0.0095 CNY/(kW·hr)for SO_(2)and NOx control technologies,respectively.The unit power generation incremental cost of twin spray tower technology was 7.2%higher than that of dual-loop spray tower technology.The effect of key parameters on operating cost was analyzed.The unit power generation incremental cost increased because of increments in the electricity price for SO_(2)control technology and the price of the reductant in NOx control technology.With high sulfur content or NOx concentration,the unit power generation incremental cost caused by pollutant control increased,whereas the unit pollutant abatement cost decreased.However,the annual operating hours or load increased,thereby leading to a decline in unit power generation incremental cost and unit pollutant abatement cost. | Yongxin Zhang Cong Luo Yan Lu You Zhang Can Zhou Zhiying Zhou Xuecheng Wu Chenghang Zheng Xiang Gao | 2023 | Journal of Environmental Sciences2023，，1： | 0 |
| 8 | Insertal Orientation Has No Influence on the Expression of gfp Gene and the Growth of the Host Synechococcus sp.PCC7942显示文摘在转基因的过程,外国基因能集成于在二个方向的主机染色体,它可以影响它的表达式。以便学习 insertalorientation 的效果, gfp 记者基因在 Synechococcus sp 的 isiAB 地点被插入。PCC7942 冷淡的方向,和 GFP 表示层次和转基因的水藻的生长被比较。gfp 基因能在每个方向表示,这被显示出,并且没有重要差别在在二 recombinant 水藻之间的海藻的生长和 GFP 表示层次上被检测。 | LU Yongzhong ZHANG Xuecheng | 2006 | Journal of Ocean University of China2006，5，1： | 0 |
| 9 | SARS-CoV-2-specific T cell responses wane profoundly in convalescent individuals 10 months after primary infection显示文摘A key question in the coronavirus disease 2019(COVID-19)pandemic is the duration of specific T cell responses against the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)post primary infection,which is difficult to address due to the large-scale COVID-19 vaccination and re-exposure to the virus.Here,we conducted an analysis of the long-term SARS-CoV-2-specific T cell responses in a unique cohort of convalescent individuals(CIs)that were among the first to be infected worldwide and without any possible antigen re-exposure since then.The magnitude and breadth of SARS-CoV-2-specific T cell responses correlated inversely with the time that had elapsed from disease onset and the age of those CIs.The mean magnitude of SARS-CoV-2-specific CD4 and CD8 T cell responses decreased about 82%and 76%,respectively,over the time period of ten months after infection.Accordingly,the longitudinal analysis also demonstrated that SARS-CoV-2-specific T cell responses waned significantly in 75%of CIs during the follow-up.Collectively,we provide a comprehensive characterization of the long-term memory T cell response in CIs,suggesting that robust SARS-CoV-2-specific T cell immunity post primary infection may be less durable than previously expected. | Ziwei Li Tiandan Xiang Boyun Liang Jing Liu Hui Deng Xuecheng Yang Hua Wang Xuemei Feng Gennadiy Zelinskyy Mirko Trilling Kathrin Sutter Mengji Lu Ulf Dittmer Baoju Wang Dongliang Yang Xin Zheng Jia Liu | 2023 | Virologica Sinica2023，38，4： | 0 |
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