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Complete mitochondrial genomes of two deep-sea pandalid shrimps,Heterocarpus ensifer and Bitias brevis:insights into the phylogenetic position of Pandalidae(Decapoda:Caridea)

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Journal of Oceanology and Limnology 2020年第3期38卷 816-825页

作者： SUN Shao’e CHeNG Jiao SUN Song SHA Zhongli Department of Marine Organism Taxonomy and Phylogeny Institute of OceanologyChinese Academy of SciencesQingdao 266071China Deep Sea Research Center Institute of OceanologyChinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China

The mitochondrial genome(mitogenome)analysis is a significant tool for investigating the evolutionary history of metazoan *** family Pandalidae is a diverse caridean group containing mainly deep-sea *** May 302019,only two complete mitogenomes are available in *** we present the complete mitogenome sequences of two deep-sea pandalid shrimps,Heterocarpus ensifer and Bitias brevis through Illumina *** mitochondrial genomes were determined to be 15939 bp and 15891 bp long,and both consist of 13 protein-coding genes(PCGs),23 transfer-RNA genes(tRNAs),two ribosomal-RNA genes(rRNAs),and one control *** nucleotide composition is biased toward adenine and ***,the gene contents and arrangements are consistent with the pancrustacean ground *** alignment of the control regions of four pandalids reveals a conserved sequence block(CSB)(104 bp in length,average GC%=29.47%and 69.23%similarity).A phylogenetic analysis based on 51 Caridea complete mitogenomes revealed that the deep-sea pandalid shrimps are situated an intermediate lineage,with a tendency to originated from those living in shallow sea area.

关键词： Pandalidae deep sea mitochondrial genome gene order phylogenetic relationships

e]iomimetic approaches toward smart bio-hybric systems

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Nano Research 2018年第6期11卷 3009-3030页

作者： Zhiqiang Luo Dara e. Weiss Qingyun Liu Bozhi Tian Colleae of Life Science and Technology Huazhong University of Science and Technology Wuhan 430074 China Department of Chemistry The University of Chicago Chicago IL 606d7 USA The James Franck Institute The University of Chicago Chicago IL 60637 USA The Institute for Biophysical Dynamics The University of Chicago Chicago IL 60637 USA

Bio-integrated materials and devices can blur the interfaces between living and artificial systems. Microfluidics, bioelectronics, and engineered nanostructures, with close interactions with biology at the cellular or tissue levels, have already yielded a spectrum of new applications. Many new designs emerge, including of organ-on-a-chip systems, biodegradable implants, electroceutical devices, minimally invasive neuro-prosthetic tools, and soft robotics. In this review, we highlight a few recent advances of the fabrication and application of smart bio-hybrid systems, with a particular emphasis on the three-dimensional （3D） bio-integrated devices that mimic the 3D feature of tissue scaffolds. Moreover, neurons integrated with engineered nanostructures for wireless neuromodulation and dynamic neural output are briefly discussed. We also discuss the progress in the construction of cell-enabled soft robotics, where a tight coupling of the synthetic and biological parts is crucial for efficient function. Finally, we summarize the approaches for enhancing bio-integration with biomimetic micro- and nanostructures.

关键词： bio-integrated device bio-hybrid system biomimetics nano-bio interface

Atomic-scale simulations of material behaviors and tribology properties for BCC metal film

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Chinese Physics B 2016年第1期25卷 412-418页

作者： H D Aristizabal P A Parra P Lopez e Restrepo-Parra PCM Computational Applications Universidad Nacional de Colombia-Sede ManizalesA.A.127ManizalesColombi Universidad Cató1ica de Manizales A.A.357ManizalesColombia

This work has two main purposes：（i） introducing the basic concepts of molecular dynamics analysis to material scientists and engineers, and （ii） providing a better understanding of instrumented indentation measurements, presenting an example of nanoindentation and scratch test simulations. To reach these purposes, three-dimensional molecular dynamics （MD） simulations of nanoindentation and scratch test technique were carried out for generic thin films that present BCC crystalline structures. Structures were oriented in the plane （100） and placed on FCC diamond substrates. A pair wise potential was employed to simulate the interaction between atoms of each layer and a repulsive radial potential was used to represent a spherical tip indenting the sample. Mechanical properties of this generic material were obtained by varying the indentation depth and dissociation energy. The load-unload curves and coefficient of friction were found for each test; on the other hand, dissociation energy was varied showing a better mechanical response for films that present grater dissociation energy. Structural change evolution was observed presenting vacancies and slips as the depth was varied.

关键词： molecular dynamics pair wise potential repulsive radial potential dissociation energy

Synthesis of a copper(Ⅱ) oxide–montmorillonite composite for lead removal

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International Journal of Minerals,Metallurgy and Materials 2019年第7期26卷 803-810页

作者： Davidson e. egirani Nanfe R. Poyi Napoleon Wessey Faculty of Science Niger Delta University Wilberforce Island Nigeria Nigerian Institute of Mining and Geosciences Jos Nigeria

The synthesis of a copper(II) oxide–montmorillonite composite and its application in the removal of lead(II) ions in solution were investigated. The Acros Organics (ACOR) montmorillonite was activated using potassium hydroxide solution. The activated ACOR montmorillonite was titrated with copper(II) nitrate solution to produce the copper(II) oxide–montmorillonite composite. Adsorption experiments were conducted using batch-mode techniques under reducing conditions at ambient temperature. The reaction mechanism indicated a higher proton coefficient, greater intraparticle diffusion, and higher mass transfer rates compared with those achieved with bare montmorillonite. The intraparticle diffusion constant derived from the slope was 2.93^-3 (mg·g^–1·min^–0.5), and the intercept C was 9.86,≠ 0. In the presence of a CuO coating, the adsorption efficiency was 85.55% at pH 4 and 89.62% at pH 7. Therefore, the copper(II) oxide-montmorillonite composite, as a novel adsorbent with a very high adsorption capacity, exhibited substantially enhanced adsorption of Pb^2+ ions compared with bare montmorillonite.

关键词： activation adsorption kinetics aging coatings copper oxide montmorillonite

Nuclear mechanics during constricted migration

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Acta Mechanica Sinica 2019年第2期35卷 299-308页

作者： Yuntao Xia Charlotte R. Pfeifer Dennis e. Discher Physical Sciences Oncology Center at Pennsylvania (PSOC@Penn) University of Pennsylvania PhiladelphiaPA 19104USA Molecular and Cell Biophysics Lab University of PennsylvaniaPhiladelphiaPA 19104 USA Department of Physics and Astronomy University of Pennsylvania Philadelphia PA 19104USA

Cell migration through narrow interstitial space in tissues is commonly seen in both physiological and pathological conditions. For example, immune cells have to squeeze through vasculature and extracellular matrix to reach the wound or diseased sites, and similarly cancer cells need to crawl through porous space in tissues to invade surrounding tumor-free regions. Therefore, the bulky stiff nucleus in the cell becomes a barrier during constricted migration making such process pore-size dependent with smaller pores exponentially alleviate the passage capability. However, in some cases, cells can actively deform their nuclei to squeeze through constrictions although some price needs to be paid. In this review, we focus on:(1) nuclear structures and morphological regulations,(2) proposed mechanisms that drive constricted migration,(3) short-term consequences such as nuclear envelope (Ne) rupture and DNA damage during such process,(4) biophysical factors that facilitate Ne rupture, and (5) long term consequences such as genomic variation caused by repetitive Ne rupture. Both experimental results and modeling are provided with the intention to better understand the constricted migration.

关键词： Constricted migration Nuclear envelope rupture DNA damage

Numerical Simulation of the Tip Aerodynamics and Acoustics Test

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Journal of Thermal Science 2016年第2期25卷 153-160页

作者： F Tejero e P Doerffer O Szulc J L Cross The Szwalski Institute of Fluid-Flow Machinery Polish Academy of Sciences. Fiszera 14 80-231 Gdansk Poland NASA Ames Research Center (retired) Moffett Field CA USA

The application of an efficient flow control system on helicopter rotor blades may lead to improved aerodynamic performance. Recently, our invention of Rod vortex Generators(RvGs) has been analyzed for helicopter rotor blades in hover with success. As a step forward, the study has been extended to forward flight conditions. For this reason, a validation of the numerical modelling for a reference helicopter rotor(without flow control) is needed. The article presents a study of the flow-field of the AH-1G helicopter rotor in low-, medium- and high-speed forward flight. The CFD code FLOWer from DLR has proven to be a suitable tool for the aerodynamic analysis of the two-bladed rotor without any artificial wake modelling. It solves the URANS equations with LeA(Linear explicit Algebraic stress) k-ω model using the chimera overlapping grids technique. validation of the numerical model uses comparison with the detailed flight test data gathered by Cross J. L. and Watts M. e. during the Tip Aerodynamics and Acoustics Test(TAAT) conducted at NASA in 1981. Satisfactory agreements for all speed regimes and a presence of significant flow separation in high-speed forward flight suggest a possible benefit from the future implementation of RvGs. The numerical results based on the URANS approach are presented not only for a popular, low-speed case commonly used in rotorcraft community for CFD codes validation but preferably for medium- and high-speed test conditions that have not been published to date.

关键词： AH-1G TAAT helicopter rotor forward flight chimera overlapping grid

Influence of gadolinium and dysprosium substitution on magnetic properties and magnetocaloric effect of Fe78-xRexSi4Nb5B12Cu1 amorphous alloys

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Journal of Rare earths 2020年第12期38卷 1317-1321页

作者： Lizhong Zhao Huacun Tian Xichun Zhong Zhongwu Liu Jean-Marc Greneche R.v.Ramanujan Institute of Advanced Magnetic Materials Hangzhou Dianzi UniversityHangzhou 310012China School of Materials Science and engineering South China University of TechnologyGuangzhou 510640China Guangdong Institute of Special equipment Inspection and Research Guangzhou 528251China Institut des Molecules et Materiaux du Mans UMR CNRS 6283 Le Mans UniversiteAvenue MessiaenLe MansF-72085France School of Materials Science and engineering Nanyang Technological University639798Singapore Singapore-HUJ Alliance for Research and enterprise(SHARe) Nanomaterials for Energy and Energy-Water Nexus(NEW)Campus for Research Excellence and Technological Enterprise(CREATE)Singapore138602Singapore

Amorphous Fe78-xRexSi4 Nb5 B12Cu1(Re=Gd,Dy) ribbons with different Re contents were prepared by melt spinning to investigate the effect of heavy rare earth(Gd,Dy) substitution on the hyperfine structure,magnetic properties and magnetocaloric *** Curie temperature of Re substituted alloys,hyperfine field and magnetic moments of Fe atoms initially increase up to 1 at% Re content and then decrease monotonously for increasing Re content up to 10 at%.The dependence of magnetic entropy change(-△SM) and refrigeration capacity(RC) of the alloys on Re contents displays the same *** RCAReA values of the alloys substituted with 1 at% Gd and Dy are similar to those of recently reported Fe-based metallic glasses with enhanced RC values compared with those of Gd5 Ge1.9Si2 ***-△SM and RC values,negligible coercive force and hysteresis commonly make these Fe78-xRex-Si4 Nb5 B12Cu1 amorphous alloys as low-cost candidates for high-temperature magnetic refrigeration.

关键词： Magnetic properties Magnetocaloric effect Refrigeration capacity Rare earths

Subgroups of Finite Symmetric Groups

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数学进展 1990年第1期19卷 1-11页

作者： Cheryl e.Praeger University of Western Australia

Recent results about primitive permutation groups are surveyed.

关键词：有限对称群交换群子群

Design of bridges against large tectonic deformation

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earthquake engineering and engineering vibration 2008年第4期7卷 345-368页

作者： I.Anastasopoulos G.Gazetas v.Drosos T.Georgarakos R.Kourkoulis National Technical University

The engineering community has devoted much effort to understanding the response of soil-structure systems to seismic ground motions, but little attention to the effects of an outcropping fault offset. The 1999 earthquakes of Turkey and Taiwan, offering a variety of case histories of structural damage due to faulting, have （re）fueled the interest on the subject. This paper presents a methodology for design of bridges against tectonic deformation. The problem is decoupled in two analysis steps： the first （at the local level） deals with the response of a single pier and its foundation to fault rupture propagating through the soil, and the superstructure is modeled in a simplified manner; and the second （at the global level） investigates detailed models of the superstructure subjected to the support （differential） displacements of Step 1. A parametric study investigates typical models of viaduct and overpass bridges, founded on piles or caissons. Fixed-head piled foundations are shown to be rather vulnerable to faulting-dnduced deformation. end-bearing piles in particular are unable to survive bedrock offsets exceeding 10 cm. Floating piles perform better, and if combined with hinged pile-to-cap connections, they could survive much larger offsets. Soil resilience is beneficial in reducing pile distress. Caisson foundations are almost invariably successful. Statically-indeterminate superstructures are quite vulnerable, while statically-determinate are insensitive （allowing differential displacements and rotations without suffering any distress）. For large-span cantilever-construction bridges, where a statically determinate system is hardly an option, inserting resilient seismic isolation bearings is advantageous as long as ample seating can prevent the deck from falling off the supports. An actual application of the developed method is presented for a major bridge, demonstrating the feasibility of design against tectonic deformation.

关键词： fault rupture earthquake soil-structure interaction bridge viaduct pile group caisson foundation finite elements