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Ethylene promotes seed iron storage during Arabidopsis seed maturation via ERF95 transcription factor

Journal of Integrative Plant Biology 2020年第8期62卷 1193-1212页

作者： Ying Sun Jia Qi Li Jing Ying Yan Jun Jie Yuan Gui Xin Li yun Rong Wu Ji Ming xu Rong Feng Huang Nicholas P.Harberd Zhong Jie Ding Shao Jian Zheng State Key Laboratory of Plant Physiology and Biochemistry College of Life SciencesZhejiang UniversityHangzhou 310058China Agricultural Experimental Station Zhejiang UniversityHangzhou 310058China College of Agronomy and Biotechnology Zhejiang UniversityHangzhou 310058China Biotechnology Research Institute Chinese Academy of Agricultural SciencesBeijing 100081China Department of Plant Science University of OxfordOxford OX13RBUnited Kingdom

Because Iron(Fe)is an essential element,Fe storage in plant seeds is necessary for seedling establishment following ***,the mechanisms controlling seed Fe storage during seed development remain largely *** we reveal that an ERF95 transcription factor regulates Arabidopsis seed Fe *** show that expression of ERF95 increases during seed maturation,and that lack of ERF95 reduces seed Fe accumulation,consequently increasing sensitivity to Fe deficiency during seedling ***,overexpression of ERF95 has the opposite *** show that lack of ERF95 decreases abundance of FER1 messenger RNA in developing seed,which encodes Fe-sequestering ***,a fer1-1 loss-of-function mutation confers reduced seed Fe accumulation,and suppresses ERF95-promoted seed Fe *** addition,ERF95 binds to specific FER1 promoter GCC-boxes and transactivates FER1 *** show that ERF95 expression in maturing seed is dependent on EIN3,the master transcriptional regulator of ethylene *** lack of EIN3 reduces seed Fe content,overexpression of ERF95 rescues Fe accumulation in the seed of ein3 loss-of-function ***,we show that ethylene production increases during seed *** conclude that ethylene promotes seed Fe accumulation during seed maturation via an EIN3-ERF95-FER1-dependent signaling pathway.

关键词： expression. ERF Arabidopsis

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几种制备方法的掺铁二氧化钛光催化特性

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物理化学学报 2001年第3期17卷 282-285页

作者：水淼岳林海徐铸德浙江大学化学系杭州310027

The iron doping titanium dioxide was prepared by sol-gel,step precipitation,co-precipitation and immersion methods,*** photocatalytic activities of these prepared samples were evaluated in X-3B dispersion irradiated under *** experimental results showed that the immersion method,especially using the nano TiO2 as immersion matrix,greatly enhanced the photocatalytic *** fold enhancement in photocatalytic activity was observed in the case of the sample prepared by immersion doping *** may be attributed to the nano-size effect,the irreversible hole trapper in non-saturated bonding field of Fe3＋ and larger lattice strain.

关键词：溶胶-凝胶水解浸渍 X射线衍射二氧化钛催化剂制备光催化性能铁掺杂

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Development of an improved CBR model for predicting steel temperature in ladle furnace refining

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International Journal of Minerals,Metallurgy and Materials 2021年第8期28卷 1321-1331页

作者： Fei Yuan An-jun xu Mao-qiang Gu School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China

In the prediction of the end-point molten steel temperature of the ladle furnace, the influence of some factors is nonlinear. The prediction accuracy will be affected by directly inputting these nonlinear factors into the data-driven model. To solve this problem, an improved case-based reasoning model based on heat transfer calculation(CBR-HTC) was established through the nonlinear processing of these factors with software Ansys. The results showed that the CBR-HTC model improves the prediction accuracy of end-point molten steel temperature by5.33% and 7.00% compared with the original CBR model and 6.66% and 5.33% compared with the back propagation neural network(BPNN)model in the ranges of [-3, 3] and [-7, 7], respectively. It was found that the mean absolute error(MAE) and root-mean-square error(RMSE)values of the CBR-HTC model are also lower. It was verified that the prediction accuracy of the data-driven model can be improved by combining the mechanism model with the data-driven model.

关键词： case-based reasoning LF refining steel temperature prediction ladle lining

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几何模型约束的SAR图像建筑物提取

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红外与毫米波学报 2013年第5期32卷 444-449,480页

作者：王国军张风丽徐旭邵芸中国科学院遥感与数字地球研究所北京100101 中国科学院大学北京100049

利用高分辨率SAR图像进行建筑物提取的常规方法是首先利用二次散射特征线确定建筑物边界,然后利用叠掩、阴影等散射特征来提取建筑物高度.当建筑物目标走向与星载SAR方位向夹角较大时,其二次散射特征不明显,常规重建方法不能取得理想结... 详细信息

利用高分辨率SAR图像进行建筑物提取的常规方法是首先利用二次散射特征线确定建筑物边界,然后利用叠掩、阴影等散射特征来提取建筑物高度.当建筑物目标走向与星载SAR方位向夹角较大时,其二次散射特征不明显,常规重建方法不能取得理想结果.针对这类建筑物目标,在分析SAR图像上的散射特征为平行四边形条带的基础上,提出一种基于几何模型约束的建筑物自动提取与三维重建方法.将该方法应用于TerraSAR-X聚束模式图像,并对提取结果进行了分析和评价,表明该方法能够有效提取建筑物目标及其三维信息.

关键词：高分辨率SAR 建筑物提取几何模型约束最优化平行四边形

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Impact of microbubble enhanced, pulsed, focused ultrasound on tumor circulation of subcutaneous VX2 cancer

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Chinese Medical Journal 2014年第14期127卷 2605-2611页

作者： Li Peijing Zhu Mei xu Yali Zhao Yang Gao Shunji Liu Zheng Gao yun-hua Third Mil Med Univ Dept Ultrasound Xinqiao Hosp Chongqing 400037 Peoples R China Gen Hosp Jinan Mil Area Dept Ultrasound Jinan 250000 Shandong Peoples R China Kunming Med Coll Dept Ultrasound Affiliated Hosp 1 Kunming 650032 Yunnan Peoples R China

Background Intravascular microbubble-enhanced acoustic cavitation is capable of disrupting the vascular walls of capillaries and small vessels. This study was designed to investigate the impact of microbubble-enhanced, pulsed and focused ultrasound （MEUS） on the blood perfusion of subcutaneous VX2 tumors in rabbits. Methods Subcutaneous VX2 cancers in twenty New Zealand rabbits were treated by combining high-pressure amplitude, pulsed and focused therapeutic ultrasound （TUS） and intravenous microbubble injections. The TUS transducer was operated with a peak negative pressure of 4.6 MPa and a duty cycle of 0.41%. Controls were subcutaneous VX2 cancers treated with TUS or microbubbles only. Contrast-enhanced ultrasound （CEUS） and intravenous Evans Blue （EB） perfusion were performed to assess the tumor circulation. The tumor microvascular disruption was assessed by histological examination. Results CEUS showed that the tumor circulation almost vanished after MEUS treatment. The average peak grayscale value （GSV） of tumor CEUS dropped significantly from 84.1±22.4 to 15.8±10.8 in the MEUS-treated tumors but no significant GSV changes were found in tumors in the two control groups. The mean tumor EB content of the MEUS-treated tumors was significantly lower than that of the controls. Histological examination found scattered tumor microvascular disruption with intercellular edema after MEUS treatment. Conclusion The tumor circulation of VX2 cancers can be arrested or significantly reduced by MEUS due to microvascular disruption. Chin M~.cl ,I 2014：127 （14）： 2605-2611

关键词： VX2 tumor circulation therapeutic ultrasound microbubble contrast-enhanced ultrasound

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Reciprocal translation between SAR and optical remote sensing images with cascaded-residual adversarial networks

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Science China(Information Sciences) 2021年第2期64卷 154-168页

作者： Shilei FU Feng xu Ya-Qiu JIN Key Lab for Information Science of Electromagnetic Waves (MoE) Fudan University

Despite the advantages of all-weather and all-day high-resolution imaging, synthetic aperture radar(SAR) images are much less viewed and used by general people because human vision is not adapted to microwave scattering phenomenon. However, expert interpreters can be trained by comparing side-byside SAR and optical images to learn the mapping rules from SAR to optical. This paper attempts to develop machine intelligence that is trainable with large-volume co-registered SAR and optical images to translate SAR images to optical version for assisted SAR image interpretation. Reciprocal SAR-optical image translation is a challenging task because it is a raw data translation between two physically very different sensing modalities. Inspired by recent progresses in image translation studies in computer vision,this paper tackles the problem of SAR-optical reciprocal translation with an adversarial network scheme where cascaded residual connections and hybrid L1-GAN loss are employed. It is trained and tested on both spaceborne Gaofen-3(GF-3) and airborne Uninhabited Airborne Vehicle Synthetic Aperture Radar(UAVSAR) images. Results are presented for datasets of different resolutions and polarizations and compared with other state-of-the-art methods. The Frechet inception distance(FID) is used to quantitatively evaluate the translation performance. The possibility of unsupervised learning with unpaired/unregistered SAR and optical images is also explored. Results show that the proposed translation network works well under many scenarios and it could potentially be used for assisted SAR interpretation.

关键词： synthetic aperture radar generative adversarial network (GAN) image translation cascaded residual connection Frechet inception distance

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Near-Infrared emission from PbS Quantum Dots in polymer matrix

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Optoelectronics Letters 2007年第5期3卷 337-338页

作者： ZHANG Xiao-song DONG Xiao-yi LIU Yan-ge KAI Gui-yun WANG Zhi LI Lan HAN xu LI Yan Insititute of Modern Optics Nankai University Tianjin 300071China Institute of Material Physics lianjin University of Technology Tianjin 300191 China

PbS quantum dots were prepared in the aqueous medium from readily available precursors. The shape of the particles isapproximately spherical, and the average particle size observed from HRTEM image was 7-8 nm. We applied PbS quantumdots and PMMA polymer to fabricate PbS quantum dots-PMMA composites, and investigate the photoluminescence PbSquantum dots in PMMA matrix with different mass ratio. PbS quantum dots in PMMA matrix have broad emission be-tween 900 nm and 1 500 nm and photoluminescence peak at 1 179 nm. Additionally, the photoluminescence intensityincreases with increasing the dopant concentration. PbS quantum dots-PMMA polymer composites can be potentially usedfor polymer optical fiber and electroluminescence (EL) in optical communication.

关键词：近红外线发射量子点聚合体矩阵光学器件

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Two-Dimensional Breather Lattice Solutions and Compact-Like Discrete Breathers and Their Stability in Discrete Two-Dimensional Monatomic β-FPU Lattice

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Communications in Theoretical Physics 2009年第1期51卷 153-156页

作者： xu Quan TIAN Qiang Department of Physics Daqing Normal University Daqing 163712 China Department of Physics Beijing Normal University Beijing 100875 China

We restrict our attention to the discrete two-dimensional monatomic β-FPU lattice. We look for two- dimensional breather lattice solutions and two-dimensional compact-like discrete breathers by using trying method and analyze their stability by using Aubry＇s linearly stable theory. We obtain the conditions of existence and stability of two-dimensional breather lattice solutions and two-dimensional compact-like discrete breathers in the discrete two- dimensional monatomic β-FPU lattice.

关键词： β-FPU lattice two-dimensional breather lattice solution two-dimensional compact-like discrete breather

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Effects of CYP3A5 polymorphisms on tacrolimus pharmacokinetics in pediatric kidney transplantation:a systematic review and meta-analysis of observational studies

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World Journal of Pediatrics 2017年第5期13卷 421-426页

作者： Yi-Ping Zong Zi-Jie Wang Wan-Li Zhou Wei-Min Zhou Tie-Liang Ma Zheng-Kai Huang Chun-Chun Zhao Zhen xu Ruo-yun Tan Min Gu Department of Urology Nanjing Medical University First Affiliated HospitalNanjingChina Department of Urology The Affiliated Yixing Hospital of Jiangsu UniversityYixingChina Department of Urology Nanjing Medical University First Affiliated HospitalNanjingChina Central Laboratory The Affiliated Yixing Hospital ofJiangsu UniversityYixingChina

Background:CYP3A5 genetic polymorphisms have been reported to be strongly associated with the tacrolimus pharmacokinetics in adult kidney ***,there is no published meta-analysis in the influence of CYP3A5 variants on the requirements of the tacrolimus dose in pediatric renal-transplant recipients (RTRs).We wished to determine the effects of CYP3A5 polymorphisms on tacrolimus pharmacokinetics in pediatric ***:A literature search was conducted to include relevant articles by searching PubMed,EMBASE and the Cochrane Central Register of Controlled ***-associated parameters such as dose administration,as well as concentrations and dose-adjusted concentrations of tacrolimus were extracted and the metaanalysis ***:The meta-analysis involved four studies and one study series involving 268 pediatric RTRs.A significant difference was observed in the mean trough concentration/ dose of tacrolimus between recipients carrying CYP3A5* 3/*3 variants (referred to as 'non-expressers') and those carrying CYP3A5*1 (referred to as 'expressers') [standard mean difference (SMD)=-1.09,95% confidence interval (CI):-1.92 to-0.25,P=0.011].Moreover,significance was observed in the mean daily dose of tacrolimus between nonexpressers and expressers in pediatric RTRs (SMD=0.44,95% CI:0.20 to 0.68,P<0.001).Conclusion:Our meta-analysis identified a positive correlation between CYP3A5 genotypes and tacrolimus pharmacokinetics in pediatric RTRs.

关键词： CYP3A5 kidney transplantation meta-analysis pediatric tacrolimus

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Phosphorylation of CENP-R by Aurora B regulates kinetochore-microtubule attachment for accurate chromosome segregation

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Journal of Molecular Cell Biology 2022年第7期14卷 62-75页

作者： Divine Mensah Sedzro Xiao Yuan McKay Mullen Umer Ejaz Tongtong Yang xu Liu Xiaoyu Song yun-Chi Tang Weijun Pan Peng Zou Xinjiao Gao Dongmei Wang Zhikai Wang Zhen Dou Xing Liu xuebiao Yao MOE Key Laboratory for Cellular Dynamics University of Science and Technology of China School of Life SciencesHefei 230027China Anhui Key Laboratory for Cellular Dynamics and Chemical Biology National Center for Cross-Disciplinary Sciences&CAS Center for Excellence in Molecular Cell ScienceHefei 230026China Morehouse School of Medicine AtlantaGA 30310USA Shanghai Institute of Nutrition and Health Shanghai Institutes for Biological SciencesChinese Academy of Sciences(CAS)Shanghai 200031China College of Chemistry and Molecular Engineering Peking UniversityBeijing 100871China

Error-free mitosis depends on accurate chromosome attachment to spindle microtubules via a fine structure called the centromere that is epigenetically specified by the enrichment of CENP-A *** maintenance during mitosis requires CENP-A-mediated deposition of constitutive centromere-associated network that establishes the inner kinetochore and connects centromeric chromatin to spindle microtubules during *** previously proposed to be an adaptor of retinoic acid receptor,here,we show that CENP-R synergizes with CENP-OPQU to regulate kinetochore-microtubule attachment stability and ensure accurate chromosome segregation in *** found that a phospho-mimicking mutation of CENP-R weakened its localization to the kinetochore,suggesting that phosphorylation may regulate its *** of CENP-R phosphorylation is shown to prevent proper kinetochore-microtubule attachment at ***,CENP-R phosphorylation disrupts its binding with ***,we speculate that Aurora B-mediated CENP-R phosphorylation promotes the correction of improper kinetochore-microtubule attachment in *** CENP-R is absent from yeast,we reasoned that metazoan evolved an elaborate chromosome stability control machinery to ensure faithful chromosome segregation in mitosis.

关键词： constitutive centromere-associated network(CCAN) kinetochore microtubule Aurora B CENP-R phosphorylation

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