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Journal of Wuhan University of Technology(Materials Science) 2017年第4期32卷 963-970页

作者：何广华 ke wanwan liu liang li ya 郑化 yin yihua yi ying School of Chemistry Chemical Engineering and Life Sciences Wuhan University of Technology Wuhan 430070 China

Superabsorbent hydrogels were prepared successfully from N-succinyl chitosan grafted poly（acrylic acid-co-acrylamide）. The potassium persulfate（KPS）, N, N＇-methylenebisacrylamide（MBA） were used as the initiator and crosslinker, respectively. Fourier transform infrared spectroscopy（FTIR） and scanning electron microscopy（SeM） were used to confirm the porous network structure of superabsorbent hydrogel. The effects of reaction parameters on the swelling behaviors of the superabsorbent hydrogels were investigated. The results indicated that water absorbency increased first, and then decreased gradually with the increase in the contents of monomer（AA＋AM）, KPS, MBA or acrylamide. The product had excellent water absorbency of 1375 g/g in distilled water and 83 g/g in 0.9wt% NaCl solution. Simultaneously, the superabsorbent hydrogels were p H sensitive. The antibacterial activities of the hydrogels against escherichia coli（e. coli） were improved effectively because of polyamidoamine（PAMAM） dendrimer absorbed in the hydrogels.

关键词： superabsorbent hydrogels N-succinyl chitosan water absorbency PAMAM dendrimer antibacterial activity

efficient Photoelectrochemical Water Splitting by g-C_3N_4/TiO_2 Nanotube Array Heterostructures

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Nano-Micro letters 2018年第2期10卷 247-259页

作者： Changhai Liu Fang Wang Jin Zhang ke Wang Yangyang Qiu Qian Liang Zhidong Chen School of Materials Science and engineering Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering Changzhou University School of Petrochemical engineering Changzhou University

Well-ordered TiO_2 nanotube arrays(TNTAs)decorated with graphitic carbon nitride(g-C_3N_4) were fabricated by anodic oxidization and calcination ***, TNTAs were prepared via the anodic oxidation of Ti foil in glycerol solution containing fluorinion and 20%deionized water. Subsequently, g-C_3N_4 film was hydrothermally grown on TNTAs via the hydrogen-bonded cyanuric acid melamine supramolecular complex. The results showed that g-C_3N_4 was successfully decorated on the TNTAs and the g-C_3N_4/TNTAs served as an efficient and stable photoanode for photoelectrochemical water splitting. The facile deposition method enables the fabrication of efficient and low-cost photoanodes for renewable energy applications.

关键词： TiO2 nanotube arrays graphitic carbon nitride(g-C3N4) Heterojunction Photoelectrochemical Water splitting

embedded Atom Method-Based geometry Optimization Aspects of Body-Centered Cubic Metals

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Chinese Physics letters 2013年第5期30卷 112-115页

作者： M.güler e.güler Department of Physics Hitit University19030 CorumTurkey

We present embedded atom method-based geometry optimization calculations for Fe, Cr, Mo, Nb, Ta, V and W body-centered cubic metals with Finnis–Sinclair potentials. After the optimization, we determine their typical elastic constants, bulk modulus, shear modulus, Young's modulus, Poisson's ratios, elastic wave velocities and cohesive energies. Additionally, we perform a benchmark between the experiments and the available density functional theory results. In general, our results show a good consistency with previous findings on the elastic and cohesive energy properties of the considered metals.

关键词： modulus optimization cubic

NeCAB family of neuronal calcium-binding proteins in health and disease

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Neural Regeneration Research 2025年第5期20卷 1236-1243页

作者： Diones Bueno Michael K.e.Schafer Sudena Wang Michael J.Schmeisser Axel Methner Institute for Molecular Medicine University Medical Center of the Johannes Gutenberg-UniversityMainzGermany Department of Anesthesiology University Medical Center of the Johannes Gutenberg-UniversityMainzGermany Institute of Anatomy University Medical Center of the Johannes Gutenberg-UniversityMainzGermany

The N-terminal eF-hand calcium-binding proteins 1–3(NeCAB1–3) constitute a family of predominantly neuronal proteins characterized by the presence of at least one eF-hand calcium-binding domain and a functionally less well characterized C-terminal antibiotic biosynthesis monooxygenase domain. All three family members were initially discovered due to their interactions with other proteins. NeCAB1 associates with synaptotagmin-1, a critical neuronal protein involved in membrane trafficking and synaptic vesicle exocytosis. NeCAB2 interacts with predominantly striatal g-protein-coupled receptors, while NeCAB3 partners with amyloid-β A4 precursor protein-binding family A members 2 and 3, key regulators of amyloid-β production. This demonstrates the capacity of the family for interactions with various classes of proteins. NeCAB proteins exhibit distinct subcellular localizations: NeCAB1 is found in the nucleus and cytosol, NeCAB2 resides in endosomes and the plasma membrane, and NeCAB3 is present in the endoplasmic reticulum and golgi apparatus. The antibiotic biosynthesis monooxygenase domain, an evolutionarily ancient component, is akin to atypical heme oxygenases in prokaryotes but is not wellcharacterized in vertebrates. Prokaryotic antibiotic biosynthesis monooxygenase domains typically form dimers, suggesting that calcium-mediated conformational changes in NeCAB proteins may induce antibiotic biosynthesis monooxygenase domain dimerization, potentially activating some enzymatic properties. However, the substrate for this enzymatic activity remains uncertain. Alternatively, calcium-mediated conformational changes might influence protein interactions or the subcellular localization of NeCAB proteins by controlling the availability of protein–protein interaction domains situated between the eF hands and the antibiotic biosynthesis monooxygenase domain. This review summarizes what is known about genomic organization, tissue expression, intracellular localization, interac

关键词： calcium eF hand mitochondria nervous system signal transduction

Priority effects of forbs arriving early:the role of root interaction and asymmetric competition

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ecological Processes 2024年第1期13卷 53-65页

作者： Xiaohong Yan Xiliang Li ke Jin Institute of grassland Research Chinese Academy of Agricultural Sciences

Background The priority effect of plant arrival is a key driver of community assembly and ecosystem succession during the restoration of degraded plant communities. However, the significance of the arrival order of different plant functional groups and their interactions with community assemblies remains unclear. Using a phytotron experiment with three fully crossed factors, we investigated the underlying mechanisms of priority effects and their relationships with the biomass and biodiversity effects in mixed plant communities by manipulating the order of arrival of species, isolation of roots, and removal of specific *** The results showed that the strength and direction of priority effects were influenced by arrival order, root interactions, asymmetric competition among species, and their interactions. The identities of early and late-sown species also determined the magnitude of priority effects. The priority effects were stronger in grass-first(24.76%) and legume-first communities(24.48%) than in forb-first communities. The pot biomass of the different priority treatments was highest in grass-first(5.85 g), followed by legume-first(3.94 g) and forb-first(2.48 g). The order of arrival in the mixture significantly affected the net biodiversity effects(P ere driven by dominance effects. The community had lower overall biomass when forbs were sown first, whereas the species grown later had fewer costs with an increased overall net benefit for the resulting *** Our results emphasize that root interactions and asymmetric competition are vital determinants of order-specific priority effects in community assemblies. In addition, the importance of the priority effect of forbs sown first is related to community assembly, which may be a key determinant in successfully establishing a highly diverse community in the early stages of restoration. Species with weak competition should be considered in the early stage of community ass

关键词： Community assembly Order of arrival Overyielding Plant functional group Root isolation

Modelling ignition probability with pairwise mixing-reaction model for flame particle tracking

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Chinese Journal of Aeronautics 2021年第5期34卷 523-534页

作者： Qing XIe Zhuyin ReN ke WANg School of Aerospace engineering Tsinghua UniversityBeijing 100084China Institute for Aero engine Tsinghua UniversityBeijing 100084China Aero engine Academy of China Beijing 101300China

Reduced order models for ignition analysis can offer insights into ignition processes and facilitate the combustor *** this study,a Pairwise Mixing-Reaction(PMR)model is formulated to model the interaction between the flame particle and the surrounding cell mixture during Lagrangian flame particle ***,the model accounts for the two-way coupling of mass and energy between the flame particle and the surrounding shell layer by modelling the corresponding turbulent mixing,chemical reaction and evaporation process if *** state of a flame particle,e.g.,burnt,hot gas or extinguished,is determined based on particle *** model can properly describe the ignition process with a spark kernel being initiated in a nonflammable region,which is of practical importance in certain turbine engines and has not been rigorously accounted for by the existing models based on the estimation of local Karlovitz *** model is integrated into an ignition probability analysis platform and is demonstrated for a methane/air bluff-body flame with the flow and fuel/air mixing characteristics being extracted from a non-reacting *** results show that for the spark location being at the extreme fuellean outer shear layer of the recirculation zone,PMR can yield ignition events with a significant number of active flame *** mechanisms for the survival of the initial flame particles and the entrainment of the survived flame particles into the recirculation zone are *** results also show that the ignition probability map from PMR agrees well with the experimental observation:a high ignition probability in the shear layer of the recirculation zone near the mean stoichiometric surface,and low ignition probabilities inside the recirculation zone and the top stagnation region of the recirculation *** parametric study shows that the predicted shape of the ignition progress factor and ignition probability is in general inse

关键词： Bluff-body stabilized flame Igniting process Ignition probability Lagrangian particle tracking Pairwise mixing-reaction

Trimethylamine oxide supplementation differentially regulates fat deposition in liver, longissimus dorsi muscle and adipose tissue of growing-finishing pigs

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Animal Nutrition 2024年第2期17卷 25-35页

作者： Andong Zha Wanquan Li Jing Wang Ping Bai Ming Qi Peng Liao bie Tan Yulong Yin Laboratory of Animal Nutritional Physiology and Metabolic Process Key Laboratory of Agro-ecological Processes in Subtropical RegionNational Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry ProductionInstitute of Subtropical AgricultureChinese Academy of Sciences University of Chinese Academy of Sciences College of Animal Science and Technology Hunan Agricultural University Yunnan Southwest Agriculture and Animal Husbandry group Co. Ltd.

Trimethylamine oxide(TMAO) is a microbiota-derived metabolite, and numerous studies have shown that it could regulate fat metabolism in humans and mice. However, few studies have focused on the effects of TMAO on fat deposition in growing-finishing pigs. This study aimed to investigate the effect of TMAO on fat deposition and intestinal microbiota in growing-finishing pigs. Sixteen growing pigs were randomly divided into 2 groups and fed with a basal diet with 0 or 1 g/kg TMAO for 149 d. The intestinal microbial profiles, fat deposition indexes, and fatty acid profiles were measured. These results showed that TMAO supplementation had a tendency to decrease lean body mass(P gnificantly increased backfat thickness(P ect growth performance. TMAO significantly increased total protein(TP) concentration, and reduced alkaline phosphatase(ALP) concentration in serum(P eased the a diversity of the ileal microbiota community(P ect the colonic microbial community. TMAO supplementation significantly increased acetate content in the ileum, and Proteobacteria and escherichia-Shigella were significantly enriched in the TMAO group(P ecreased fat content, as well as the ratio of linoleic acid, n-6polyunsaturated fatty acids(PUFA), and PUFA in the liver(P e contrary, TMAO increased intramuscular fat content of the longissimus dorsi muscle, whereas the C18:2n6c ratio was increased,and the n-6 PUFA:PUFA ratio was decreased(P eatment significantly upregulated the expression of FASN and SReBP1 in C2C12 cells(P evertheless, TMAO also increased adipocyte area and decreased the CPT-1B expression in subcutaneous fat(P ken together, TMAO supplementation regulated ileal microbial composition and acetate production, and regulated fat distribution and fatty acid composition in growing-finishing pigs. These results

关键词： growing-finishing pig Trimethylamine oxide Fat deposition Fatty acid composition Intestinal microbiota

A possible new family of unconventional high temperature superconductors

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Science Bulletin 2017年第3期62卷 212-217页

作者： Jiangping Hu Congcong le Beijing Notional Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences Beijing 100190 China Collaborative Innovation Center of Quantum Matter Beijing 100871 China School of Physics University of Chinese Academy of Sdences Beijing 100049 China

We suggest a new family of Co[Ni-based materials that may host unconventional high temperature superconductivity （high-To）. These materials carry layered square lattices with each layer being formed by vertex-shared transition metal tetrahedra cation-anion complexes. The electronic physics in these materials is determined by the two dimensional layer and is fully attributed to the three near degenerated t2g d-orbitals close to a d7 filling configuration in the d-shell of CoJNi atoms. The electronic structure meets the necessary criteria for unconventional high Tc materials proposed recently by us to unify the two known high-Tc families, cuprates and iron-based superconductors. We predict that they host superconducting states with a d-wave pairing symmetry with Tc potentially higher than those of iron-based superconductors. These materials, if realized, can be a fertile new ground to study strongly correlated electronic Physics and provide decisive evidence for superconducting pairing mechanism.

关键词： Iron-based superconductors Cuprates d-Wave pairing symmetry Cobalt chalcogenides

engineering geological Assessment for Route Selection of Railway Line in geologically Active Area:A Case Study in China

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Journal of Mountain Science 2013年第4期10卷 495-508页

作者： HUANg Run-qiu LI Yan-rong QU ke WANg ke State key Laboratory of geohazard Prevention and geoenvironment Protection Chengdu University of Technology AgeCON Ltd. The Second Survey and Design Institute of China Railways

The Cheng-Lan railway links Chengdu, a central city in Southwestern China, and Lanzhou, a central city in Northwestern China. The railway passes through the Longmenshan fault zone (Wenchuan earthquake happened there on May 12, 2008), Minjiang fault zone, and Dongkunlun fault zone, which are all active. It runs over the Yangtze River and the Yellow River, and crosses high mountains and deep valleys. There exists, along the railway's alignment, different kinds of strata of hard granite and soft, weak metamorphic rocks such as carbonaceous slate, schist, and phyllite. It is, therefore, a key issue for such an infrastructure construction to assess the engineering geological conditions and risks, so as to mitigate or avoid possible georisks and to offer optional designs. geological survey and georisk assessment along the railway corridor are carried out. Special attention is given to active faults, earthquakes and seismic zones. Based on these, discussions about geological aspects for route selection of the railway are conducted and countermeasures for georisk control are proposed accordingly. Main conclusions are achieved as follows: (1) geohazards such as landslides, rockfalls and debries flows dominate both the route selection of the railway and the engineering structures (e.g., tunnels or bridges) adopted; (2) Tunnel has been proved to be an excellent structure for linear engineering in geologically active area; and (3) In the case where avoiding is impractical, necessary protection measures should be taken to engineering slopes in high earthquake intensity areas, especially the area with earthquake of Ms. 8 or greater.

关键词： Railway route selection geologicallyactive area earthquake Active fault

A Class of Homogeneous einstein Manifolds

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Chinese Annals of Mathematics,Series B 2006年第4期27卷 411-418页

作者： Yifang KANg ke LIANg Department of Mathematics Tianjin University Tianjin 300072 China School of Mathematical Sciences and LPMC Nankai University Tianjin 300071 China.

A Riemannian manifold （M, g） is called einstein manifold if its Ricci tensor satisfies r=c.g for some constant c. general existence results are hard to obtain, e.g., it is as yet unknown whether every compact manifold admits an einstein metric. A natural approach is to impose additional homogeneous assumptions. M. Y. Wang and W. Ziller have got some results on compact homogeneous space g/H. They investigate standard homogeneous metrics, the metric induced by Killing form on g/H, and get some classification results. In this paper some more general homogeneous metrics on some homogeneous space g/H are studies, and a necessary and sufficient condition for this metric to be einstein is given. The authors also give some examples of einstein manifolds with non-standard homogeneous metrics.

关键词： einstein manifold Homogeneous space general homogeneous metric