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Indirect calorimetry to estimate energy requirements for growing and finishing Nellore bulls

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Journal of Integrative Agriculture 2017年第1期16卷 151-161页

作者： s l Posada-Ochoa R R Noguera N M Rodriguez A l Costa R reis Research Group in Agricultural science-GRICA Faculty of Agricultural Sciences Universidad de Antioquia Medellin AA 1226 Colombia Animal science Department of Veterinary school Universidade Federal de Minas Gerais Belo Horizonte CEP 31270-901 Brazil

Determination of nutritional requirements is the basis for diet formulation. The objectives of this study were to determine the net energy requirements for maintenance （NEro） and weight gain （NEg） in Nellore bulls during the growing and finishing phases, and to estimate efficiency of metabolizable energy （ME） utilization for maintenance and gain （km, kg）. Five Nellore bulls were housed in individual pens at the Universidade Federal de Minas Gerais （Belo Horizonte, Brazil） and evaluated over four experimental periods at 210, 315,378 and 454 kg shrunk body weight （sBW）, approximately. During each period, heat production （HP） was quantified by open circuit indirect calorimetry for three feeding levels： ad libitum, restricted and fasting. The NEm requirement was determined by linear regression between the log of HP andthe ME intake （MEI） for the ad libitum and restricted levels. This requirement was also determined by quantifying fasting heat production （FHP）. The NEQ requirement was calculated by the difference between MEI and HP during ad libitum feeding. The k and kg were calculated by the relationship between net energy （NE） and ME requirements for maintenance and weight gain （MEm, MEp）, respectively. The NEm requirements per kg of metabolic empty body weight （EBW0.75） fluctuated between 348 and 517 kJ d-1, showing a decreasing trend with age, and were higher than the values reported in the literature. The NEg requirements ranged between 48.3 and 164 kJ kg-1 EBW0.75 d-1, and varied according to age and weight gain. The k values varied between 58.6 and 69.7%, while kg varied between 23.4 and 40.2%. We concluded that NEm and NEg requirements were influenced by age and possibly by the level of stress, nervousness and activity of animals into the respirometry chamber. Further studies should quantify HP with records of positional changes （time spent standing vs. lying down）. Additionally, HP quantification should be repeatedly performed in the same experimental period to

关键词： calorimetry efficiency of energy utilization energy requirements Zebu cattle

Burnett Order stress and spatially-Dependent Boundary Conditions for the lattice Boltzmann Method

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Communications in Computational Physics 2020年第1期27卷 167-197页

作者： Timothy reis school of Computing and Mathematical sciences University of GreenwichLondon SE109LSUK

stress boundary conditions for the lattice Boltzmann equation that are consistent to Burnett order are proposed and imposed using a moment-based *** accuracy of the method with complicated spatially-dependent boundary conditions for stress and velocity is investigated using the regularized lid-driven cavity *** complete set of boundary conditions,which involve gradients evaluated at the boundaries,are implemented locally.A recently-derived col.ision operator with modified equilibria and velocity-dependent col.ision rates to reduce the defect in Galilean invariance is also *** results are in excellent agreement with existing benchmark data and exhibit second-order *** lattice Boltzmann stress field is studied and shown to depart significantly from the Newtonian viscous stress when the ratio of Mach to Reynolds numbers is not negligibly small.

关键词： lattice Boltzmann method moment based boundary conditions Burnett stress reg-ularized cavity

Corrosion Resistance of Transmission Pipeline steel Coated with Five Types of Enamels

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Acta Metallurgica sinica(English letters) 2017年第4期30卷 390-398页

作者： liang Fan Fujian Tang signo T. reis Genda Chen Michael l. Koenigstein Department of Civil Architectural and EnvironmentalEngineering Missouri University of Science andTechnology Rolla MO 65409-0030 USA Pro-Perma Engineered Coatings Roesch Inc. Belleville IL62226 USA

Corrosion is one of the main causes of incidents occurred in hazardous liquid and gas transmission pipelines in the UsA, resulting in a loss of over $12 billion per year. In this study, the corrosion resistance of pipeline steel coated with five types of enamel was investigated in 3.5 wt% NaCl solution with linear polarization resistance and electrochemical impedance spectroscopy tests. steel coupons were cut from API 5l X65 pipeline steel and coated with five types of enamels using the wet process. The microstructures of all enamel samples were examined by scanning electron microscopy. Experimental results indicate that all enamel coatings increase the corrosion resistance of pipeline steel, and pure enamel PE2, mixed enamels ME1 and ME2 have higher corrosion resistances than pure enamel PE1 and mixed enamel ME3.

关键词： steel pipe Enamel coating scanning electron microscopy (sEM) Electrochemical impedance spectroscopy (EIs)

Archean-Ediacaran evolution of the Campos Gerais Domain-A reworked margin of the são Francisco paleocontinent(sE Brazil):Constraints from metamafic-ultramafic rocks

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Geoscience Frontiers 2022年第5期13卷 286-308页

作者： Marco Aurélio Piacentini Pinheiro George l.Guice Joana reis Magalhães Geological survey of Brazil–CPRM Av Brazil 1731Belo Horizonte 30140-002Brazil Department of Mineral sciences National Museum of Natural HistorySmithsonian Institution10th Street and Constitution Avenue NWWashington D.C.20560USA

The Campos Gerais Domain(CGD)in southeastern Brazil.is an approximately 180 km×35 km area of Archean–Proterozoic rocks located southwest of the são Francisco Craton(sFC).The Archean–Paleopro terozoic evolution of the CGD—alongside its potential correlation with the sFC or other cratonic blocks in the region-is currently *** present the results of systematic petrography,bulkrock geochemistry,mineral chemistry and geochronology for a suite of scarcely studied mafic–ultramafic rocks from the *** also provide a compilation of previously reported bulk-rock geochemical and spinel group mineral chemical data for mafic–ultramafic rocks throughout the CGD,and geochronological information for various lithotypes in the *** CGD records a protracted Mesoarchean to statherian(3.1–1.7 Ga)crustal evolution,which we interpret to share a common history with the southern sFC and their related reworked segments,suggesting that it is a westward extension of this cratonic *** metavolcano-sedimentary rocks of the Fortaleza de Minas and Alpinópolis segments represent a Mesoarchean greenstone belt that is stratigraphically and chemically comparable to Archean greenstone belts worldwide,and that is broadly coeval with a local suite of tonalite-trondhjemite-grano diorite(TTG)gneisses and migmatites.U-Pb sHRIMP zircon data from a subalkaline metagabbro yielded a concordia age of ca.2.96 Ga,revealing a previously unrecognized phase of Archean magmatism in the CGD that can be chrono-correlated with metakomatiite and TTG generation elsewhere in the são Francisco *** data contradict a hypothesis whereby the metavolcano-sedimentary rocks of the Jacuí-Bom Jesus da Penha and Petúnia segments represent an ophiolite,as previously suggested,instead presenting features that point to formation in association with a continental *** with a U-Pb(sHRIMP)crystallization age of ca.2.13 Ga recorded by zircon grains from a metaultramafic rock,these data h

关键词： Komatiites são Francisco Craton southern Brasília Orogen Archean geodynamics Rhyacian orogeny

shielding AZ91D-1%Ca from corrosion through ultrasound melt treatment:A study for stent design

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Journal of Magnesium and Alloys 2023年第8期11卷 2901-2915页

作者： I.V.Gomes M.Pacheco M.Nienaber s.C.Neves D.Mei A.Barros R.l.reis J.l.Alves H.Puga CMEMs–UMinho University of MinhoGuimarãesPortugal lABBEls–Associate laboratory BragaGuimarãesPortugal B's Research Group-Research Institute on Biomaterials Biodegradables and BiomimeticsUniversity of MinhoHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative MedicineAvepark-Parque de Ciência e TecnologiaBarco GuimarãesPortugal ICVs/3B's-PT Government Associate laboratory BragaGuimarãesPortugal Institute of Material and Process Design Helmholtz-Zentrum HereonGeesthacht 21502Germany school of Materials science and Engineering&Henan Key laboratory of Advanced Magnesium Alloy Zhengzhou UniversityZhengzhou 450001China

Magnesium-based materials show great potential for producing biodegradable stents,but their high corrosion rates are a *** study investigates whether ultrasound melt treatment can change the corrosion response of an extruded AZ91D-1.0%Ca(wt.%)in Earle's Balanced salt solution by tailoring the intermetallics'morphology in the as-extruded *** results showed that the wires from ultrasound-treated ingots corroded faster than non-treated ones in immersion for up to 6 *** trend shifted for longer periods,and ultrasound-treated material showed lower corrosion rates and uniform corrosion,while the non-treated material displayed localized corrosion *** testing of the wires demonstrated that immersion in EBss lowered the tensile strength and elongation at fracture due to material degradation,regardless of the processing ***,this decline was sharper in the non-treated *** findings suggest that ultrasound melt processing can be a promising method for improving the corrosion resistance of magnesium-based materials,paving the way for their use in manufacturing biodegradable stents.

关键词： Magnesium Ultrasound treatment stent Corrosion Mechanical properties

Properties of Collagen/sodium Alginate Hydrogels for Bioprinting of skin Models

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Journal of Bionic Engineering 2023年第1期20卷 105-118页

作者： Tian Jiao Qin lian Weilong lian Yonghui Wang Dichen li Rui l.reis Joaquim Miguel Oliveira state Key laboratory for Manufacturing system Engineering Xi’an Jiaotong UniversityXi’an710049China shaanxi Ketao-AM Technology Co. Ltd.Xi’an710100China B’s Research Group I3Bs—Research Institute on BiomaterialsBiodegradables and BiomimeticsHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative MedicineUniversity of MinhoBarco4805-017GuimarãesPortugal ICVs/3B’s–PT Government Associate laboratory Barco4805-017GuimarãesPortugal

3D printing technology has great potential for the reconstruction of human ***,the reconstructed skin has some differences from natural skin,largely because the hydrogel used does not have the appropriate biological and physical properties to allow healing and *** study examines the swelling,degradability,microstructure and biological properties of Collagen/sodium Alginate(Col/sA)hydrogels of differing compositions for the purposes of skin *** the content of sodium alginate causes the hydrogel to exhibit stronger mechanical and swelling properties,a faster degradation ratio,smaller pore size,and less favorable biological *** optimal 1%collagen hydrogel was used to print bi-layer skin in which fibroblasts and keratinocytes showed improved spreading and proliferation as compared to other developed *** Col/sA hydrogels presented suitable tunability and properties to be used as a bioink for bioprinting of skin aiming at finding applications as 3D models for wound healing research.

关键词： Bioink Bioprinting-Collagen sodium alginate hydrogel-skin Wound healing Bionic

Extracellular matrix-derived materials for tissue engineering and regenerative medicine:A journey from isolation to characterization and application

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Bioactive Materials 2024年第4期34卷 494-519页

作者： Helena Vilaça-Faria Jennifer Noro Rui l.reis Rogério P.Pirraco 3B’s Research Group I3Bs-Research Institute on BiomaterialsBiodegradables and BiomimeticsUniversity of MinhoHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative MedicineAveParkParque de Ciência e TecnologiaZona Industrial da Gandra4805-017BarcoGuimarãesPortugal ICVs/3B’s-PT Government Associate laboratory BragaGuimarãesPortugal

Biomaterial choice is an essential step during the development tissue engineering and regenerative medicine(TERM)*** selected biomaterial must present properties allowing the physiological-like recapitulation of several processes that lead to the reestablishment of homeostatic tissue or organ *** derived from the extracellular matrix(ECM)present many such properties and their use in the field has been steadily *** this growing importance,it becomes imperative to provide a comprehensive overview of ECM biomaterials,encompassing their sourcing,processing,and integration into TERM *** review compiles the main strategies used to isolate and process ECM-derived biomaterials as well as different techniques used for its characterization,namely biochemical and chemical,physical,morphological,and ***,some of their applications in the TERM field are explored and discussed.

关键词： Extracted ECM Extraction methods Characterization ECM-derived applications

An Outlook on Implantable Biosensors for Personalized Medicine

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Engineering 2021年第12期7卷 1696-1699页

作者： Rita Rebelo Ana Isabel Barbosa Vitor M.Correlo Rui l.reis Research Institute on Biomaterials Biodegradablesand BiomimeticsUniversity of MinhoHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative MedicineBarcoGuimarães 4805-017Portugal ICVs/3B’s-PT Government-Associated laboratory BragaGuimarães 4710-057Portugal

Biosensors are a fast-growing field,as they have been shown to be very helpful in our daily life,playing roles in industries such as agriculture,food safety,homeland security,bioprocessing,environmental monitoring,and industrial *** these,the application of biosensing in medicine and biomedical engineering may have the highest potential for growth and for affecting human quality of life in the near *** potential.is driven by the need for new and improved devices and technologies with improved sensitivity,specificity,reliability,and biocompatibility.

关键词： Outlook specificity playing

Replication of natural surface topographies to generate advanced cell culture substrates

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Bioactive Materials 2023年第10期28卷 337-347页

作者： N.O.Monteiro J.F.Fangueiro R.l.reis N.M.Neves 3B’s Research Group I3Bs-Research Institute on BiomaterialsBiodegradables and BiomimeticsUniversity of MinhoHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative MedicineAveParkParque de Ciencia e Tecnologi1Zona Industrial da Gandr14805-017BarcoGuimaraesPortugal ICVs/3B’s-PT Government Associate laboratory Brag1Guimar˜aesPortugal

surface topographies of cell culture substrates can be used to generate in vitro cell culture environments similar to the in vivo cell niches. In vivo, the physical properties of the extracellular matrix (ECM), such as its topography, provide physical cues that play an important role in modulating cell function. Mimicking these properties remains a challenge to provide in vitro realistic environments for cells. Artificially generated substrates’ topographies were used extensively to explore this important surface cue. More recently, the replication of natural surface topographies has been enabling to exploration of characteristics such as hierarchy and size scales relevant for cells as advanced biomimetic substrates. These substrates offer more realistic and mimetic environments regarding the topographies found in vivo. This review will highlight the use of natural surface topographies as a template to generate substrates for in-vitro cell culture. This review starts with an analysis of the main cell functions that can be regulated by the substrate’s surface topography through cell-substrate interactions. Then, we will discuss research works wherein substrates for cell biology decorated with natural surface topographies were used and investigated regarding their influence on cellular performance. At the end of this review, we will highlight the advantages and challenges of the use of natural surface topographies as a template for the generation of advanced substrates for cell culture.

关键词： Biomimetic topography Cell culture substrates Natural surface topographies