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Polymorph selection of magnesium under different pressures: A simulation study
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作者 Wei liu Boqiang Wu +5 位作者 Ze'an Tian Yunfei Mo Tingfei Xi Zhiyi Wan Rangsu liu hairong liu 《Chinese Physics B》 SCIE EI CAS CSCD 2022年第1期445-452,共8页
Molecular dynamics simulations were used to investigate the influence of pressure on the structural properties and dynamics of magnesium(Mg)during rapid solidification.The dynamics analysis revealed that,with an incre... Molecular dynamics simulations were used to investigate the influence of pressure on the structural properties and dynamics of magnesium(Mg)during rapid solidification.The dynamics analysis revealed that,with an increase in pressure,the dynamics of Mg melt slowed down sharply and the dynamical heterogeneities increased,leading to a denser structure.Atom-level structural analysis using the cluster-type index method suggested that the predominant structure transformed from hexagonal closed-packed to face-centered cubic with increasing pressure from 0 GPa to 5 GPa,and then transformed to the A15 complex crystal structure as the pressure increased above 10 GPa.In addition,the nature of polymorph selection was investigated by analyzing the phonon dispersion of Mg under different pressures.These findings provide a novel insight into polymorphic transitions of Mg under pressure and guide the selection of Mg polymorphs for practical applications. 展开更多
关键词 MAGNESIUM polymorph selection molecular dynamics PRESSURE
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氮沉降对草地昆虫多样性影响的研究进展 被引量:1
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作者 牛永杰 马全会 +4 位作者 朱玉 刘海荣 吕佳乐 邹元春 姜明 《生物多样性》 CAS CSCD 北大核心 2023年第9期143-154,共12页
昆虫是草地中数量和种类最丰富的生物类群之一,占据食物网的不同营养级,具有重要的生态服务功能。然而,全球范围内昆虫数量和多样性持续降低,对生态安全构成了潜在威胁。作为全球变化的主要组分,不断加剧的氮沉降导致植物多样性下降,但... 昆虫是草地中数量和种类最丰富的生物类群之一,占据食物网的不同营养级,具有重要的生态服务功能。然而,全球范围内昆虫数量和多样性持续降低,对生态安全构成了潜在威胁。作为全球变化的主要组分,不断加剧的氮沉降导致植物多样性下降,但其对昆虫多样性的影响及机制尚不明确。由此,本文梳理了近年来国内外相关研究,发现氮沉降可以对昆虫种群数量和多样性产生正向、负向或中性影响,其作用方向主要依赖于氮沉降持续的时间和强度、不同昆虫类群和草地类型。氮沉降能够通过改变植物多样性、植物生物量、植物营养、群落结构、微环境等多种途径影响昆虫的食物资源、生境适宜性以及种间相互作用,进而对昆虫群落产生影响。未来从研究方法上应考虑氮沉降与其他全球变化因子的交互作用以及更大时空尺度的实验研究,从研究内容上应加强氮沉降对草地昆虫食物网和多营养级关系作用的理解,从研究机理上应重视昆虫关键功能性状对氮沉降的响应。本文有益于深入理解氮沉降对草地昆虫群落的作用规律及其调控机制,并为全球变化背景下草地昆虫多样性的保护提供理论指导。 展开更多
关键词 养分富集 氮添加 全球变化 节肢动物 昆虫群落 食物网
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A versatile 3D-printable hydrogel for antichondrosarcoma,antibacterial,and tissue repair 被引量:1
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作者 Wenxiang Zhu Zheng Zhou +10 位作者 Yuting Huang hairong liu Ning He Xiaolong Zhu Xiaoxiao Han Dengming Zhou Xuanchu Duan Xin Chen Yahui He Xiaolin Meng Shuai Zhu 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2023年第5期200-211,共12页
Following operative treatment of chondrosarcoma,post-surgery tissue reconstruction may be confronted with daunting challenges,including the delayed self-repair of defective tissue,tumor recurrence,and bac-terial infec... Following operative treatment of chondrosarcoma,post-surgery tissue reconstruction may be confronted with daunting challenges,including the delayed self-repair of defective tissue,tumor recurrence,and bac-terial infection.To overcome these challenges,a methacrylic anhydride(MA)modified sericin(SerMA)solution mixed with procyanidins(PC)loaded polydopamine(PDA)modified ZIF-8(PC@ZIF-8@PDA)nanoparticles to form a multifunctional PC@ZIF-8@PDA/SerMA hydrogel after exposure under blue light.Hydrogel products with pre-designed shapes were printed out by using the SerMA solution carrying PC@ZIF-8@PDA nanoparticles and chondrocytes,indicating that PC@ZIF-8@PDA/SerMA hydrogels with personalized shapes can be fabricated via 3D printing.Photocrosslinked PC@ZIF-8@PDA/SerMA hydrogel is able to kill chondrosarcoma cells and bacteria,like Staphylococcus aureus(S.aureus),and Escherichia coli(E.coli),by its photothermal activity combined with near-infrared radiation(NIR).The PC@ZIF-8@PDA/SerMA hydrogel exhibited an antioxidative activity and a good biocompatibility and was easily monitored by its florescent and photoacoustic properties.Rabbit articular cartilage defects were efficiently repaired by PC@ZIF-8@PDA/SerMA hydrogels with encapsulated corresponding autologous chondrocytes,and mice skin burning wounds were swiftly regenerated by applying this hydrogel.Hence,the PC@ZIF-8@PDA/SerMA hydrogel can be potentially applied to the clinic treatment of chondrosarcoma and tissue defect repair after chondrosarcoma resection due to its multifunction in the future. 展开更多
关键词 HYDROGEL SERICIN ZIF-8 CHONDROSARCOMA Cartilage repair
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Identification of potential indicators for testis quality in swamp eels(Monopterus albus)through metabolomics analysis
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作者 Fei liu Xing Lin +4 位作者 Kaifeng Meng Yuanyuan Chen hairong liu Yuanli Zhao Daji Luo 《Water Biology and Security》 2023年第4期78-90,共13页
The swamp eel(Monopterus albus)is a commonly cultured freshwater fish.Selection and cultivation of fecund broodstock is crucial for efficient artificial reproduction in this species.However,there are currently no guid... The swamp eel(Monopterus albus)is a commonly cultured freshwater fish.Selection and cultivation of fecund broodstock is crucial for efficient artificial reproduction in this species.However,there are currently no guidelines for selecting high-quality males in M.albus.This study quantitatively investigated the sperm motility of male swamp eels during the breeding season by using computer-assisted sperm analysis system.Variability in the proportion and number of motile sperm was observed between individual males.The testes were grouped into high-quality and low-quality according to sperm quality.Morphometric parameters of the two groups were analyzed.We found that high-quality testes were longer(150±27 mm verses 127±19 mm)than low-quality testes.Besides,the proportion of testes with a dark appearance was slightly higher(58.3%verses 48.1%)in the high-quality group than in the low-quality group.Metabolomic analysis was conducted to compare the metabolite profiles of high-quality and low-quality testes.Glycerophospholipids,organic acids,glycerolipids,amino acids,sphingolipids,and nucleotides were the most abundant metabolites in the testes of swamp eels.Moreover,135 differential metabolites were identified.Several nucleotide derivatives,including 50-deoxyadenosine,20-deoxyadenosine,and ribosyl adenosine,were the most significantly enriched metabolites in highquality testes.These metabolites are potential indicators for the testis quality in M.albus.Altogether,our work provides systematic and quantitative data about the physiological and biochemical characteristics of M.albus testis,which provides an evidential basis for the selection of high-fecundity parents to improve artificial reproduction efficiency of M.albus. 展开更多
关键词 Monopterus albus Sperm motility Testis quality Metabolomics Nucleotide metabolites
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ASER:Animal Sex Reversal Database
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作者 Yangyang Li Zonggui Chen +11 位作者 hairong liu Qiming Li Xing Lin Shuhui Ji Rui Li Shaopeng Li Weiliang Fan Haiping Zhao Zuoyan Zhu Wei Hu Yu Zhou Daji Luo 《Genomics, Proteomics & Bioinformatics》 SCIE CAS CSCD 2021年第6期873-881,共9页
Sex reversal,representing extraordinary sexual plasticity during the life cycle,not only triggers reproduction in animals but also affects reproductive and endocrine system-related diseases and cancers in humans.Sex r... Sex reversal,representing extraordinary sexual plasticity during the life cycle,not only triggers reproduction in animals but also affects reproductive and endocrine system-related diseases and cancers in humans.Sex reversal has been broadly reported in animals;however,an integrated resource hub of sex reversal information is still lacking.Here,we constructed a comprehensive database named ASER(Animal Sex Reversal)by integrating sex reversal-related data of 18 species from teleostei to mammalia.We systematically collected 40,018 published papers and mined the sex reversal-associated genes(SRGs),including their regulatory networks,from 1611 core papers.We annotated homologous genes and computed conservation scores for whole genomes across the 18 species.Furthermore,we collected available RNA-seq datasets and investigated the expression dynamics of SRGs during sex reversal or sex determination processes.In addition,we manually annotated 550 in situ hybridization(ISH),fluorescence in situ hybridization(FISH),and im-munohistochemistry(IHC)images of SRGs from the literature and described their spatial expression in the gonads.Collectively,ASER provides a unique and integrated resource for researchers to query and reuse organized data to explore the mechanisms and applications of SRGs in animal breeding and human health.The ASER database is publicly available at http://aser.ihb.ac.cn/. 展开更多
关键词 Sex reversal Sex reversal-associated gene DATABASE OMICS CONSERVATION
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Strong unique continuation property for a class of fourth order elliptic equations with strongly singular potentials
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作者 hairong liu Xiaoping Yang 《Science China Mathematics》 SCIE CSCD 2022年第4期707-730,共24页
In this paper we prove the strong unique continuation property for a class of fourth order elliptic equations involving strongly singular potentials.Our argument is to establish some Hardy-Rellich type inequalities wi... In this paper we prove the strong unique continuation property for a class of fourth order elliptic equations involving strongly singular potentials.Our argument is to establish some Hardy-Rellich type inequalities with boundary terms and introduce an Almgren’s type frequency function to show some doubling conditions for the solutions to the above-mentioned equations. 展开更多
关键词 strong unique continuation property fourth order elliptic equation singular potential Hardy-Rellich type inequality
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Strong Unique Continuation of Sub-elliptic Operator on the Heisenberg Group
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作者 hairong liu Xiaoping YANG 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 2013年第3期461-478,共18页
In this paper, the Almgren's frequency function of the following sub-elliptic equation with singular potential on the Heisenberg group:-Cu+V(z,t)u=Xi(aij(z,t)Xju)+V(z,t)u=0 is introduced. The monotonicity ... In this paper, the Almgren's frequency function of the following sub-elliptic equation with singular potential on the Heisenberg group:-Cu+V(z,t)u=Xi(aij(z,t)Xju)+V(z,t)u=0 is introduced. The monotonicity property of the frequency is established and a doubling condition is obtained. Consequently, a quantitative proof of the strong unique continuation property for such equation is given. 展开更多
关键词 Heisenberg group Frequency function Doubling condition Strongunique continuation principle
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