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| 1 | Recent advances on environmental corrosion behavior and mechanism of high-entropy alloys显示文摘In the past decade, the sudden rise of high-entropy alloys(HEAs) has become a research hotspot in the domain of metal materials. HEAs break through the design concept of traditional single-principal element alloys, and the four core effects, especially the high entropy and cocktail effects, make HEAs exhibit much better corrosion resistance than traditional corrosion-resistant metal materials, e.g., stainless steels, copper-nickel alloys, and high-nickel alloys. Currently, the corrosion resistance of HEAs causes great concern in the field of corrosion research. This article reviews the corrosion behavior and mechanism of HEAs in various aqueous solutions, revealing the correlation among the composition, microstructure and corrosion resistance of HEAs, and elaborates the influence of heat treatment, anodizing treatment and preparation methods on the corrosion behavior of HEAs. This knowledge will benefit the on-demand design of corrosion-resistant HEAs, which is an important trend of future development. Finally, perspectives regarding the corrosion research of HEAs are outlined to guide future studies. | Yu Fu Jun Li Hong Luo Cuiwei Du Xiaogang Li | 2021 | Journal of Materials Science & Technology2021，，21： | 18 |
| 2 | Molecular breeding of water lily: engineering cold stress tolerance into tropical water lily显示文摘Water lilies(order Nymphaeales)are rich in both economic and cultural values.They grow into aquatic herbs,and are divided into two ecological types:tropical and hardy.Although tropical water lilies have more ornamental and medicinal values compared to the hardy water lily,the study and utilization of tropical water lilies in both landscaping and pharmaceutical use is greatly hindered due to their limited planting area.Tropical water lilies cannot survive the winter in areas beyond 24.3°N latitude.Here,the transgenic pipeline through the pollen-tube pathway was generated for water lily for the first time.To improve cold stress tolerance of tropical water lilies,a gene encoding choline oxidase(CodA)driven by a cold stress-inducible promoter was transformed into a tropical water lily through the pollen-tube transformation.Six independent transgenic lines were tested for survival rate during two winter seasons from 2015 to 2017 in Hangzhou(30.3°N latitude).PCR and southern blot detection revealed that the CodA gene had been integrated into the genome.Reverse transcription PCR showed that CodA gene was induced after cold stress treatment,and further quantitative real-time PCR revealed different expressions among six 4 lines and line 3 had the highest expression.Multiple physiological experiments showed that after cold stress treatment,both the conductivity and malondialdehyde(MDA)levels from transgenic plants were significantly lower than those of non-transgenic plants,whereas the content of betaine and the activity of superoxide dismutase,catalase,and peroxidase were higher than those from non-transgenic plants.These results suggest that expression of exogenous CodA gene significantly improved the cold stress tolerance of tropical water lilies through a wide range of physiological alterations.Our results currently expanded a six-latitude cultivating area of the tropical water lilies.These results not only illuminate the bright future for water lily breeding but will also facilitate the functional genomic studies. | Cuiwei Yu Guirong Qiao Wenmin Qiu Dongbei Yu Shirong Zhou Yan Shen Guanchun Yu Jing Jiang Xiaojiao Han Mingying Liu Liangsheng Zhang Fei Chen Yuchu Chen Renying Zhuo | 2018 | Horticulture Research2018，5，1： | 4 |
| 3 | Learning a discriminative mid-level feature for action recognition显示文摘In this paper,we address the problem of recognizing human actions from videos.Most of the existing approaches employ low-level features(e.g.,local features and global features)to represent an action video.However,algorithms based on low-level features are not robust to complex environments such as cluttered background,camera movement and illumination change.Therefore,we propose a novel random forest learning framework to construct a discriminative and informative mid-level feature from low-level features of densely sampled 3D cuboids.Each cuboid is classified by the corresponding random forests with a novel fusion scheme,and the cuboid’s posterior probabilities of all categories are normalized to generate a histogram.After that,we obtain our mid-level feature by concatenating histograms of all the cuboids.Since a single low-level feature is not enough to capture the variations of human actions,multiple complementary low-level features(i.e.,optical flow and histogram of gradient 3D features)are employed to describe 3D cuboids.Moreover,temporal context between local cuboids is exploited as another type of low-level feature.The above three low-level features(i.e.,optical flow,histogram of gradient 3D features and temporal context)are effectively fused in the proposed learning framework.Finally,the mid-level feature is employed by a random forest classifier for robust action recognition.Experiments on the Weizmann,UCF sports,Ballet,and multi-view IXMAS datasets demonstrate that out mid-level feature learned from multiple low-level features can achieve a superior performance over state-of-the-art methods. | LIU CuiWei PEI MingTao WU XinXiao KONG Yu JIA YunDe | 2014 | Science China(Information Sciences)2014，57，5： | 3 |
| 4 | Water lilies as emerging models for Darwin’s abominable mystery显示文摘Water lilies are not only highly favored aquatic ornamental plants with cultural and economic importance but they also occupy a critical evolutionary space that is crucial for understanding the origin and early evolutionary trajectory of flowering plants.The birth and rapid radiation of flowering plants has interested many scientists and was considered‘an abominable mystery’by Charles Darwin.In searching for the angiosperm evolutionary origin and its underlying mechanisms,the genome of Amborella has shed some light on the molecular features of one of the basal angiosperm lineages;however,little is known regarding the genetics and genomics of another basal angiosperm lineage,namely,the water lily.In this study,we reviewed current molecular research and note that water lily research has entered the genomic era.We propose that the genome of the water lily is critical for studying the contentious relationship of basal angiosperms and Darwin’s‘abominable mystery’.Four pantropical water lilies,especially the recently sequenced Nymphaea colorata,have characteristics such as small size,rapid growth rate and numerous seeds and can act as the best model for understanding the origin of angiosperms.The water lily genome is also valuable for revealing the genetics of ornamental traits and will largely accelerate the molecular breeding of water lilies. | Fei Chen Xing Liu Cuiwei Yu Yuchu Chen Haibao Tang Liangsheng Zhang | 2017 | Horticulture Research2017，4，1： | 1 |
| 5 | Diverse O-methyltransferases catalyze the biosynthesis of floral benzenoids that repel aphids from the flowers of waterlily Nymphaea prolifera显示文摘Nymphaea is a key genus of the ANA grade(Amborellales,Nymphaeales,and Austrobaileyales)of basal flowering plants,which serve as a key model to study the early evolution of floral traits.In this study,we comprehensively investigated the emission,biosynthesis,and biological function of the floral scent in a night-blossoming waterlily Nymphaea prolifera.The headspace volatile collection combined with GC-MS analysis showed that the floral scent of N.prolifera is predominately comprised by methylated benzenoids including anisole,veratrole,guaiacol,and methoxyanisole.Moreover,the emission of these floral benzenoids in N.prolifera exhibited temporal and spatial pattern with circadian rhythm and tissue specificity.By creating and mining transcriptomes of N.prolifera flowers,12 oxygen methyltransferases(NpOMTs)were functionally identified.By in vitro enzymatic assay,NpOMT3,6,and 7 could produce anisole and NpOMT5,7,9,produce guaiacol,whereas NpOMT3,6,9,11 catalyzed the formation of veratrole.Methoxyanisole was identified as the universal product of all NpOMTs.Expression patterns of NpOMTs provided implication for their roles in the production of the respective benzenoids.Phylogenetic analysis of OMTs suggested a Nymphaea-specific expansion of the OMT family,indicating the evolution of lineage-specific functions.In bioassays,anisole,veratrole,and guaiacol in the floral benzenoids were revealed to play the critical role in repelling waterlily aphids.Overall,this study indicates that the basal flowering plant N.prolifera has evolved a diversity and complexity of OMT genes for the biosynthesis of methylated benzenoids that can repel insects from feeding the flowers.These findings provide new insights into the evolutional mechanism and ecological significance of the floral scent from early-diverged flowering plants. | Guanhua Liu Jianyu Fu Lingyun Wang Mingya Fang Wanbo Zhang Mei Yang Xuemin Yang Yingchun Xu Lin Shi Xiaoying Ma Qian Wang Hui Chen Cuiwei Yu Dongbei Yu Feng Chen Yifan Jiang | 2023 | Horticulture Research2023，10，12： | 0 |
| 6 | Construction of defect-containing UiO-66/MoSe_(2) heterojunctions with superior photocatalytic performance for wastewater treatment and mechanism insight显示文摘Metal-organic frameworks are recognized as promising multifunctional materials,especially metal-organic framework-based photocatalysts,which are considered to be ideal photocatalytic materials.Herein,a new type of UiO-66/MoSe_(2) composite was prepared using the solvothermal method.The optimum composite was selected by adjusting the mass ratio of UiO-66 and MoSe_(2).X-ray diffraction analysis showed that the mass ratio influenced the crystal plane exposure rate of the composite,which may have affected its photocatalytic performance.The composite is composed of ultra-thin flower-like MoSe_(2) that wrapped around cubic UiO-66,a structure that increases the abundance of active sites for reactions and is more conducive to the separation of carriers.The photocatalytic properties of the composite were evaluated by measuring the degradation rate of Rhodamine B and the catalyst’s ability to reduce Cr(VI)-containing wastewater under visible light irradiation.Rhodamine B was decolorized completely in 120 min,and most of the Cr(VI)was reduced within 150 min.The photochemical mechanism of the complex was studied in detail.The existence of Mo^(6+)and oxygen vacancies,in addition to the Z-type heterojunction promote the separation of electrons and holes,which enhances the photocatalytic effect. | Xiao Han Xiaoxuan Wang Jiafang Wang Yingjie Xie Cuiwei Du Chongfei Yu Jinglan Feng Jianhui Sun Shuying Dong | 2023 | Frontiers of Chemical Science and Engineering2023，17，4： | 0 |
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