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日粮高硫和钼条件下评估甘氨酸螯合形式的铜元素在阉牛体内的生物利用率

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日粮高硫和钼条件下评估甘氨酸螯合形式的铜元素在阉牛体内的生物...

The quasi-Gramian solution of a non-commutative extension of the higher-order nonlinear Schr?dinger equation

中国畜牧兽医学会动物营养学分会第十一次全国动物营养学术研讨会

作者： S.L.Hansen P.Schlegel L.R.Legleiter K.E.Lloyd j.w.spears 张津校 Department of Animal Science North Carolina State UniversityRaleigh 27695 Pancosma S.A.GenevaSwitzerland

利用60头9月龄,初始体重接近277kg的肉牛(安格斯肉牛29头,安格斯一西门塔尔杂交肉牛31头)在日粮含有高水平硫和钼的条件下连续饲喂148天,评估甘氨酸螯合铜来源的铜相对于饲料级硫酸铜形式铜的生物利用率。在同一品系内根据体重将阉牛随... 详细信息

利用60头9月龄,初始体重接近277kg的肉牛(安格斯肉牛29头,安格斯一西门塔尔杂交肉牛31头)在日粮含有高水平硫和钼的条件下连续饲喂148天,评估甘氨酸螯合铜来源的铜相对于饲料级硫酸铜形式铜的生物利用率。在同一品系内根据体重将阉牛随机分为5个试验组:(1)对照组(不添加铜);(2)5mg Cu/kg DM(硫酸铜);(3)10mg Cu/kg DM(硫酸铜);(4)5mg Cu/kg DM(甘氨酸螯合铜);(5)10mg Cu/kg DM(甘氨酸螯合铜)。试验阉牛个体分别饲喂青贮玉米为基础的日粮(分析值8.2mg Cu/kg DM),试验前期(第一阶段)添加2mg Mo/kg DM和0.15%的硫元素连续使用120天;在试验后期(第二阶段)添加6mg Mo/kg DM和0.15%的硫元素持续测试28天。结果表明:两种来源的铜均可以显著改善阉牛的日增重和重料比(p=0.01)。与对照组相比,各试验组最终的血浆铜蓝蛋白,血浆铜以及肝脏铜的含量明显提高(P<0.05);10mg Cu/kg DM试验组比5mg Cu/kg DM试验组改善显著(P<0.05)。基于最终血浆铜,肝铜含量和血浆铜蓝蛋白中铜的含量与对应的日粮铜元素摄入量进行的多元回归方法,在试验第一阶段(添加2mg Mo/kg DM拮抗剂),添加甘氨酸螯合铜试验组的生物利用率相对于硫酸铜组(100%)分别为140%(P=0.10),131%(P=0.12)和140%(p=0.01);在试验第二阶段(添加6mg Mo/kg DM拮抗剂),甘氨酸螯合铜试验组的最终血浆铜,肝铜含量和血浆铜蓝蛋白中铜的生物利用率相对于硫酸铜组(100%)分别为144%(P=0.01),150%(P=0.01)和157%(P=0.01)。本研究结果表明,在日粮高水平拈抗因子硫和钼存在条件下,甘氨酸螯合形式的铜比硫酸铜具有更好的利用率。

关键词：高硫和钼评估铜生物利用率

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Communications in Theoretical Physics 2024年第3期76卷 51-61页

作者： H w A Riaz j Lin Department of Physics Zhejiang Normal UniversityJinhua 321004China

The nonlinear Schr?dinger(NLS)equation,which incorporates higher-order dispersive terms,is widely employed in the theoretical analysis of various physical *** this study,we explore the non-commutative extension of the higher-order NLS *** treat real or complex-valued functions,such as g_(1)=g_(1)(x,t)and g_(2)=g_(2)(x,t)as non-commutative,and employ the Lax pair associated with the evolution equation,as in the commutation *** derive the quasi-Gramian solution of the system by employing a binary Darboux *** soliton solutions are presented explicitly within the framework of *** visually understand the dynamics and solutions in the given example,we also provide simulations illustrating the associated ***,the solution can be used to study the stability of plane waves and to understand the generation of periodic patterns within the context of modulational instability.

关键词： integrable systems Darboux transformation solitons

Superplasticity of fine-grained Mg-10Li alloy prepared by severe plastic deformation and understanding its deformation mechanisms

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journal of Magnesium and Alloys 2024年第1期12卷 316-331页

作者： H.T.jeong S.w.Lee w.j.Kim Department of Materials Science and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul 121-791Republic of Korea

The superplastic behavior and associated deformation mechanisms of a fine-grained Mg-10.1 Li-0.8Al-0.6Zn alloy(LAZ1011)with a grain size of 3.2μm,primarily composed of the BCCβphase and a small amount of the HCPαphase,were examined in a temperature range of 473 K to 623 *** microstructural refinement of this alloy was achieved by employing high-ratio differential speed *** best superplasticity was achieved at 523 K and at strain rates of 10^(-4)-5×10^(-4)s^(-1),where tensile elongations of 550±600%were *** the heating and holding stage of the tensile samples prior to tensile loading,a significant increase in grain size was observed at temperatures above 573 ***,it was important to consider this effect when analyzing and understanding the superplastic deformation behavior and *** the investigated strain rate range,the superplastic flow at low strain rates was governed by lattice diffusion-controlled grain boundary sliding,while at high strain rates,lattice diffusion-controlled dislocation climb creep was the rate-controlling deformation *** was concluded that solute drag creep is unlikely to *** the late stages of deformation at 523 K,it was observed that grain boundary sliding led to the agglomeration of theαphase,resulting in significant strain *** mechanism maps were constructed forβ-Mg-Li alloys in the form of 2D and 3D formats as a function of strain rate,stress,temperature,and grain size,using the constitutive equations for various deformation mechanisms derived based on the data of the current tests.

关键词： Magnesium-lithium alloy Superplasticity Severe plastic deformation Grain size Grain growth

Physiological phenotypes differ among color morphs in introduced common wall lizards(Podarcis muralis)

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Integrative Zoology 2024年第3期19卷 505-523页

作者： Ali AMER Sierra spears Princeton L.VAUGHN Cece COLwELL Ethan H.LIVINGSTON wyatt MCQUEEN Anna SCHILL Dustin G.REICHARD Eric j.GANGLOFF Kinsey M.BROCK Department of Biological Sciences Ohio Wesleyan UniversityDelawareOhioUSA Department of Ecology and Evolutionary Biology Princeton UniversityPrincetonNew JerseyUSA Department of Biology Idaho State UniversityPocatelloIdahoUSA Department of Environmental Science Policyand ManagementCollege of Natural ResourcesUniversity of CaliforniaBerkeleyUSA Museum of Vertebrate Zoology University of CaliforniaBerkeleyUSA

Many species exhibit color polymorphisms which have distinct physiological and behavioral ***,the consistency of morph trait covariation patterns across species,time,and ecological contexts remains *** trait covariation is especially relevant in the context of invasion biology and urban ***,physiological traits pertaining to energy maintenance are crucial to fitness,given their immediate ties to individual reproduction,growth,and population *** investigated the physiological traits of Podarcis muralis,a versatile color polymorphic species that thrives in urban environments(including invasive populations in Ohio,USA).we measured five physiological traits(plasma corticosterone and triglycerides,hematocrit,body condition,and field body temperature),which compose an integrated multivariate *** then tested variation among co-occurring color morphs in the context of establishment in an urban *** found that the traits describing physiological status and strategy shifted across the active season in a morph-dependent manner—the white and yellow morphs exhibited clearly different multivariate physiological phenotypes,characterized primarily by differences in plasma *** suggests that morphs have different strategies in physiological regulation,the flexibility of which is crucial to urban *** white-yellow morph exhibited an intermediate phenotype,suggesting an intermediary energy maintenance *** morphs also exhibited distinct phenotypes,but the low prevalence of this morph in our study populations precludes clear *** work provides insight into how differences among stable polymorphisms exist across axes of the phenotype and how this variation may aid in establishment within novel environments.

关键词： color polymorphism physiological status seasonal variation thermoregulation urban habitat

Compressive property and energy absorption characteristic of interconnected porous Mg-Zn-Y alloys with adjusting Y addition

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journal of Magnesium and Alloys 2024年第1期12卷 171-185页

作者： j.A.Liu S.j.Liu B.wang w.B.Sun X.j.Liu Z.w.Han College of Materials Science and Engineering Key Laboratory of Automobile Materials(Ministry of Education)Jilin UniversityChangchun 130022PR China Key Laboratory of Bionic Engineering(Ministry of Education) College of Biological and Agricultural EngineeringJilin UniversityChangchun130022PR China weihai Institute for Bionics-jilin University Weihai 264205PR China

In this study,interconnected porous Mg-2Zn-xY alloys with different phase compositions were prepared by various Y additions(x=0.4,3,and 6 wt.%)to adjust the compressive properties and energy absorption *** characterization methods were then applied to identify the microstructure of the porous Mg-Zn-Y and describe the details of the second *** tests were performed at room temperature(RT),200℃,and 300℃to study the impact of the Y addition and testing temperature on the compressive properties of the porous *** experimental results showed that a high Y content promotes a microstructure refinement and increases the volume fraction of the second *** the Y content increases,different Mg-Zn-Y ternary phases appear:I-phase(Mg_(3)Zn_(6)Y),w-phase(Mg_(3)Zn_(3)Y_(2)),and LPSO phase(Mg_(12)ZnY).when the Y content ranges between 0.4%and 6%,the compressive strength increases from 6.30MPa to 9.23 MPa,and the energy absorption capacity increases from 7.33 Mj/m^(3)to 10.97 Mj/m^(3)at RT,which is mainly attributed to the phase composition and volume fraction of the second ***,the average energy absorption efficiency is independent of the Y *** addition,the compressive deformation behaviors of the porous Mg-Zn-Y are altered by the testing *** compressive strength and energy absorption capacity of the porous Mg-Zn-Y decrease due to the softening effect of the high temperature on the *** deformation behaviors at different temperatures are finally observed to reflect the failure mechanisms of the struts.

关键词： Porous magnesium Rare earth elements Microstructure Compressive behavior Energy absorption characteristic

SMILE soft X-ray Imager flight model CCD370 pre-flight device characterisation

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Earth and Planetary Physics 2024年第1期8卷 25-38页

作者： S.Parsons D.j.Hall O.Hetherington T.w.Buggey T.Arnold M.w.j.Hubbard A.Holland Centre for Electronic Imaging the Open UniversityMilton KeynesMK76AAUK

Throughout the SMILE mission the satellite will be bombarded by radiation which gradually damages the focal plane devices and degrades their *** order to understand the changes of the CCD370s within the soft X-ray Imager,an initial characterisation of the devices has been carried out to give a baseline performance *** CCDs have been characterised,the two flight devices and the flight spa *** has been carried out at the Open University in a bespo ke cleanroom measure ment *** results show that there is a cluster of bright pixels in the flight spa re which increases in size with tempe *** at the nominal ope rating tempe rature(-120℃) it is within the procure ment ***,the devices meet the specifications when ope rating at -120℃ in 6 × 6 binned frame transfer science *** se rial charge transfer inefficiency degrades with temperature in full frame *** any charge losses are recovered when binning/frame transfer is implemented.

关键词： CCD soft X-ray imager characterisation SMILE

A hydrodynamic modelling of wave-activated bodies for wavelet marine regions

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Clean Energy 2024年第2期8卷 35-47页

作者： j.S.Peh Mohammed w.Muhieldeen N.H.Shuaib Mechanical Engineering Department Faculty of EngineeringTechnology&Built EnvironmentUCSI UniversityKuala Lumpur56000Malaysia MTC Engineer Sdn.Bhd Shah AlamSelangorMalaysia

Recently,most wave energy research has targeted sea areas with high power density under extreme wave conditions for *** trend often leads to higher energy costs for wave power ***,many marine areas with low power density,characterized by wavelet conditions and less destructive forces than extreme wave conditions,remain ***,this study aimed to propose a wave-activated body model for sea regions with wavelet *** wave-activated body design process encompassed site selection,parameter determination,geometry design,comparison and performance evaluation using the ANSYS®AQwA *** results indicated that the proposed device achieved the desired heave motion,with an amplitude range of 1.2 to-2.5 m,validating its potential for deployment in marine regions with wavelet ***,while the proposed design is optimized for wavelet conditions,it was found to have potential limitations in extreme wave *** observation emphasizes the challenge of formulating a generalized design suitable for both ***,it is pivotal for wave-activated body designs to be customized based on the specific ocean conditions they target,underscoring the need for specialized designs of wave energy converters that consider the unique wave characteristics of their deployment sites.

关键词： wave energy converter South China sea renewable and sustainable energy wavelet ANSYS AQwA hydrodynamic wave-activated bodies

The CCD instrument background of the SMILE SXI

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Earth and Planetary Physics 2024年第1期8卷 15-24页

作者： M.w.j.Hubbard O.Hetherington D.j.Hall T.w.Buggey S.Parsons T.Arnold A.Holland C.Pagani S.Sembay Centre for Electronic Imaging The Open UniversityMilton KeynesMK76AAUK X-ray and Observational Astronomy Group Department of Physics&AstronomyUniversity of LeicesterLE17RHUK

The ESA and CAS SMILE mission orbit is highly elliptical and will pass through multiple radiation *** Soft X-ray Imager(SXI)instrument aboard has a radiation shutter door designed to close when the surrounding radiation flux is *** shutter door will close when passing below an altitude threshold to protect against trapped particles in the Earth’s Van Allen ***,two radiation environments can be approximated based on the shutter door position:open and *** instrument background for the CCDs(Charge-Coupled Devices)that form the focal plane array of the SXI were evaluated for the two *** to the correlation of the space environment with the solar cycle,the solar minima and maxima,the background was also evaluated at these two *** results demonstrated that the highest instrument background will occur during solar minima due to the main contributing source being Galactic Cosmic Rays(GCRs).It was also found that the open background was highest for solar minima and that the closed background was highest during solar *** is due to the radiation shutter door acting as a scattering centre and the changes in the energy flux distribution of the GCRs between the two solar extremes.

关键词： instrument background X-ray astronomy space radiation

Generalized time-dependent generator coordinate method for induced fission dynamics

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Frontiers of physics 2024年第4期19卷 1-12页

作者： B.Li D.Vretenar T.Nikšić j.Zhao P.w.Zhao j.Meng State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Physics Department Faculty of ScienceUniversity of Zagreb10000 ZagrebCroatia Center for Circuits and Systems Peng Cheng LaboratoryShenzhen 518055China

The generalized time-dependent generator coordinate method(TD-GCM)is extended to include pairing *** correlated GCM nuclear wave function is expressed in terms of time-dependent generator states and weight *** particle–hole channel of the effective interaction is determined by a Hamiltonian derived from an energy density functional,while pairing is treated dynamically in the standard BCS approximation with time-dependent pairing tensor and single-particle occupation *** the inclusion of pairing correlations,various time-dependent phenomena in open-shell nuclei can be described more *** model is applied to the description of saddle-to-scission dynamics of induced *** generalized TD-GCM charge yields and total kinetic energy distribution for the fission of 240Pu,are compared to those obtained using the standard time-dependent density functional theory(TD-DFT)approach,and with available data.

关键词： nuclear density functional theory generator coordinate method fission dynamics