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Effect of dietary near ideal amino acid profile on heat production of lactating sows exposed to thermal neutral and heat stress conditions

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Journal of Animal science and Biotechnology 2021年第2期12卷 739-754页

作者： s.zhang J.s.Johnson N.L.Trottier Department of Animal science Michigan State UniversityEast Lansing 48824USA UsDA-ARs Livestock Behavior Research Unit West Lafayette 47907USA

Background:Reduced protein diet manifested potential to mitigate heat production based on the concept of ideal amino acid profile.The hypothesis of this study was that lactating sows fed a low crude protein(LCP)diet with supplemental amino acid produce less heat compared to those fed a high crude protein(HCP)diet under both thermal neutral(TN)and heat stress(Hs)conditions.Methods:Thirty-two lactating sows were allotted to HCP(193 g CP/kg)and LCP(140 g CP/kg)diets under thermal neutral(TN,21±1.5°C)or cycling heat stress(Hs,32±1.5°C daytime and 24±1.5°C nighttime)conditions.Diets contained 0.90%sID lysine and 10.8 MJ/kg net energy.Positive pressure indirect calorimeters were used to measure gas exchange in individual sows with litters,and individual piglets on days 4,8,14 and 18.sow and litter weights were recorded on days 1,10 and 21.Results:sow total heat production(THP)was calculated by subtracting litter THP from sow+litter THP based on BW0.75.sow BW and body protein(BP)loss was greater for LCP diet compared to HCP diet in peak lactation(Pspectively)and throughout the entire lactation period(Pspectively)under Hs conditions.Heat-stressed sows fed HCP diet had higher(Pspiration rate at 07:00(Psows fed HCP diet.In sows fed LCP diet,those under Hs tended to have higher(P=0.098)rectal temperature at 13:00 and had higher(Pspiration rate at 07:00,13:00 and 19:00 compared to TN sows.The relationship between daily THP and days in lactation of sows fed LCP diet was quadratic(Pscending trend until day 14 and a descending trend from days 14 to 18.sows fed LCP diet had lower daily THP at day 18(Pse fed the HCP diet under Hs conditions.Conclusion:Reduction in THP in sows fed LCP diet was largely associated with THP on day 18 of lactation under Hs conditions.Feeding LCP diets alleviated the increased body temperature in

关键词： Amino acid Heat stress Lactating sows Low protein diet Total heat production

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帕金森病病人脑铁氧代谢的时空模式

国际医学放射学杂志 2024年第4期 497-497页

作者： s.Yan J.Lu Y.Li J.Cho s.zhang W.Zhu 王笑男

摘要目的铁沉积和线粒体功能障碍与帕金森病（PD）的发生和发展密切相关。旨在提取深部灰质（DGM）的磁敏感值和氧摄取分数（OEF），探讨PD脑铁氧代谢的时空进展模

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Plastic Effect on the sliding Inception Bet ween a Cylinder and a Rigid Flat

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Acta Mechanica solida sinica 2019年第1期32卷 1-16页

作者： s.zhang J.Huan H.song X.Liu Y.G.Wei LNM Institute of MechanicsChinese Academy of SciencesBeijing 100190China Department of Mechanical Engineering Johns Hopkins UniversityBaltimoreMD 21218USA College of Engineering Peking UniversityBeijing 100871China school of Engineering science University of Chinese Academy of SciencesBeijing 100049China

The effec ts of mat erial plasticity and local slip on the sliding inception of asperity are studied in the present work.Firstly,a semi-analytical solution is derived under the full-stick condition to analyze the effect of material plasticity on sliding friction.Then,a friction model with contact stiffness criterion is proposed to study the cases from partial-slip condition to full-stick condition.Finite element simulations with the provided model are used to present the friction map.The friction coefficient of full-s tick interface converges at a st able value,approxima tely 0.3.Plasticity saturation appears as the normalized contact interference u*is larger than 3.A transition mechanism from slip-dominated to yield-dominated takes place in the sliding process.The simulation results are compared with the semi-analytical solution.

关键词： Mat erial yielding Local slip Contact stiffness criterion Finite element simulation

spectral and Timing Analysis of the Black Hole Transient MAXI J1631–479 During its 2019 Outburst Observed with Insight-HXMT

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Research in Astronomy and Astrophysics 2022年第11期22卷 21-33页

作者： Yu-Cong Fu L.M.song G.Q.Ding s.N.zhang J.L.Qu s.zhang L.zhang Q.C.Bu Y.Huang X.Ma Z.X.Yang Y.L.Tuo X.F.Lu D.K.Zhou B.Y.Wu T.M.Li Y.C.Xu Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqiXinjiang 830011China University of Chinese Academy of sciences Chinese Academy of SciencesBeijing 100049China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Institut fur Astronomie und Astrophysik Kepler Center for Astro and Particle PhysicsEberhard Karls UniversitatSand 1D-72076 TübingenGermany

We report spectral and timing analysis of the black hole transient MAXI J1631–479 during the hard intermediate state of its 2019 outburst from the Insight-Hard X-ray Modulation Telescope(Insight-HXMT)observations.We find that the energy dependence of the type-C quasi-periodic oscillation(QPO)frequency evolves with time:during the initial rise of a small flare(~MJD 58526.0-58527.1),the QPO frequency increases with increasing energy from~1 to~100 ke V,and then the frequency remains constant after MJD 58527.1.We discover a possible new phenomenon of Fe line’s QPO frequency jump that has never been observed for other black hole transients:during the small flare,the QPO frequency around the Fe line energy is higher than any other energy band,with the frequency difference Δf=0.25±0.08 Hz between 5.5–7.5 ke V and other energy bands.The spectral analysis shows that the evolution of QPOs is related to the equivalent width of the narrow Fe line,and its equivalent width increases during this small flare.We propose that the QPO frequency difference results from the differential precession of a vertically extended jet,and the higher QPO frequency of Fe line could be caused by the layered jet when the jet scale increases.At the same time,the evolution of QPOs is related to the accretion rate,while the energy dependence of QPOs supports the existence of deceleration in the vertically distributed jet.

关键词： accretion accretion disks stars:black holes X-rays:binaries

Finger pad friction and tactile perception of laser treated,stamped and cold rolled micro-structured stainless steel sheet surfaces

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Friction 2017年第2期5卷 207-218页

作者： s.zhang X.ZENG D.T.A MATTHEWs A.IGARTUA E.RODRIGUEZ-VIDAL J.CONTRERAs FORTEs E.VAN DER HEIDE state Key Laboratory of Tribology Tsinghua University Beijing 100084 ChinaLaboratory for Surface Technology and Tribology Faculty of Engineering Technology University of Twente Drienerlolaan 5 Enschede 7522 NB the Netherlands shanghai Advanced Research Institute Chinese Academy of Sciences China Laboratory for surface Technology and Tribology Faculty of Engineering Technology University of Twente Drienerlolaan 5 Enschede 7522 NB the NetherlandsTata Steel Research & Development PO Box 10000 IJmuiden 1970CA the Netherlands IK4-Tekniker C/Ignacio Goenaga 5 Eibar 20600 Spain Acerinox Europa sAU Los Barrios Spain Laboratory for surface Technology and Tribology Faculty of Engineering Technology University of Twente Drienerlolaan 5 Enschede 7522 NB the NetherlandsTU Delft Faculty of Civil Engineering and Geosciences Stevinweg 1 Delft 2628 CN the Netherlands

Tactile perception is a complex system, which depends on frictional interactions between skin and counter-body. The contact mechanics of tactile friction is governed by many factors such as the state and properties of skin and counter-body. In order to discover the connection between perception and tactile friction on textured stainless steel sheets, both perception experiments (subjective) and tactile friction measurements (objective) were performed in this research. The perception experiments were carried out by using a panel test method to identify the perceived roughness, perceived stickiness and comfort level from the participants. For the friction experiments, tactile friction was measured by a multi-axis force/torque transducer in vivo. The perceived stickiness was illustrated as an effective subjective stimulus, which has a negative correlation to the comfort perception. No significant evidence was revealed to the connection between the perceived roughness and comfort perception, and this relationship may be influenced by the participants’ individual experience, gender and moisture level of skin. Furthermore, the kinetic tactile friction was concluded as an objective stimulus to the comfort perception with a negative correlation.

关键词： tactile friction perception pleasant touch biotribology

selection of micro-fabrication techniques on stainless steel sheet for skin friction

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Friction 2016年第2期4卷 89-104页

作者： s.zhang X.ZENG D.T.A.MATTHEWs A.IGARTUA E.RODRIGUEZ-VIDAL J.CONTRERAs FORTEs V.sAENZ DE VITERI Laboratory for surface Technology and Tribology Faculty of Engineering Technology University of Twente Drienerlolaan 5 Enschede 7522 NB the Netherlands Laboratory for surface Technology and Tribology Faculty of Engineering Technology University of Twente Drienerlolaan 5 Enschede 7522 NB the NetherlandsShanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201210 China Tata steel Research & Development Ijmuiden 1970 CA the Netherlands IK4-Tekniker C/Ignacio Goenaga 5 Eibar 20600 Spain Acerinox Europa sAU Los Barrios Spain

This review gives a concise introduction to the state-of-art techniques used for surface texturing, e.g., wet etching, plasma etching, laser surface texturing (LsT), 3D printing, etc. In order to fabricate deterministic textures with the desired geometric structures and scales, the innovative texturing technologies are developed and extended. such texturing technology is an emerging frontier with revolutionary impact in industrial and scientific fields. With the help of the latest fabrication technologies, surface textures are scaling down and more complex deterministic patterns may be fabricated with desired functions, e.g., lotus effect (hydrophobic), gecko feet (adhesive), haptic tactile, etc. The objective of this review is to explore the surface texturing technology and its contributions to the applications.

关键词： microfabrication surface texturing

A 3D in vitro co-culture model for evaluating biomaterial-mediated modulation of foreign-body responses

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Bio-Design and Manufacturing 2022年第3期5卷 465-480页

作者： Betul Cakmak Pelin saglam-Metiner Goze Beceren Yu s.zhang Ozlem Yesil-Celiktas Department of Bioengineering Faculty of EngineeringEge University35100 IzmirTurkey Division of Engineering in Medicine Brigham and Women’s HospitalDepartment of MedicineHarvard Medical SchoolCambridgeMAUSA

The immune response after implantation of a biomaterial may shorten the functional life of the implant,depending on the degree of the response.In this study,we used a polyacrylamide-alginate(PAAm-Alg)hydrogel,which has been previously characterized as a biocompatible material and shown to enhance regeneration of cartilage in vivo,along with a graphiteenhanced hydrogel(PAAm-Alg-G)as a non-biocompatible counterpart,to evaluate macrophage attachment and polarization to pro-or anti-inflammatory phenotypes.The performance of each biomaterial in the presence of fibroblasts and chondrocytes was validated by an in vitro model which demonstrated modulation of the foreign-body response.A blend of 5%gelatin methacryloyl and 0.1%methacrylated hyaluronic acid was optimized to mimic the extracellular matrix(ECM)and support cell viability,proliferation,migration,and functionality at an initial concentration of 3.25×10^(5) cells/mL.The PAAm-Alg-G hydrogel localized in the simulated ECM showed cytotoxic and genotoxic effects for both fibroblasts and chondrocytes,while exhibiting a proliferative effect on macrophages with elevated immune response.The M1/M2 ratio was 0.73 for PAAm-Alg hydrogel but 2.64 for PAAm-Alg-G,leading to significant M1 dominance(ps expected,on day 13.Moreover,loading PAAm-Alg hydrogel with transforming growth factor beta-3(TGF-β3)resulted in a slightly more balanced M1/M2 ratio of 0.87(p>0.05).The interleukin-6(IL-6)concentration secreted in the presence of PAAm-Alg hydrogel(4.58 pg/mL)significantly decreased(pse(pswitch from a pro-inflammatory to an anti-inflammatory response.Predicting immune responses by developing a simplistic yet powerful three-dimensional in vitro model provides advantages in preparing for clinical use of biomaterials.

关键词： Biomaterial Macrophage polarization Genotoxicity Biocompatibility Immune response

基于第3代双源双能量CT诊断口腔鳞状细胞癌颈部淋巴结转移

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国际医学放射学杂志 2023年第2期 239-240页

作者： Y.H.Luo X.L.Mei Q.R.Liu B.Jiang s.zhang K.zhang 许强

摘要目的评价双能CT（DECT）的参数在鉴别口腔鳞状细胞癌（OsCC）病人颈部转移性淋巴结可能性，并探讨DECT与病理特征的关系。方法收集2019年11月—2021

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Identifying rate limitation and a guide to design of fast-charging Li-ion battery

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InfoMat 2020年第5期2卷 942-949页

作者： sheng s.zhang Electrochemistry Branch FCDD-RLS-DCSensors and Electron Devices DirectorateU.S.Army Research LaboratoryAdelphiMaryland

Fast-charging is highly demanded for applications requiring short charging time.However,fast-charging triggers serious problems,leading to decline in charge acceptance and energy efficiency,accelerated capacity degradation,and safety risk.In this work,a three-electrode coin cell with a Li metal reference electrode is designed to individually record the potential of two electrodes,and measure the impedance of each electrode by using a power-optimized graphite-LiNi0.80Co0.15Al0.05O2 electrode couple.It is shown that regardless of the state-of-charge the Li-ion cell's impedance is contributed predominantly by the cathode,and that the cathode's impedance is dominated by the charge-transfer resistance.In consistence with the impedance results,polarization of the Li-ion cell is dominated by the cathode.It is surprised to find that no Li plating occurs on the graphite anode even if the charging rate is increased to 10 C(1 C=1.30 mA cm^−2).The results of this work indicate that low overall impedance with a high cathode-to-anode impedance ratio is the key to enabling safe fast-charging,and that fast-charging Li-ion batteries without Li plating on the graphite anode is possible if the cathode and graphite anode are optimistically engineered.

关键词： charge-transfer resistance fast-charging impedance Li plating polarization