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A facile strategy for tuning the density of surface-grafted biom.lecules for m.lt extrusion-based additive m.nufacturing applications

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Bio-Design and m.nufacturing 2024年第3期7卷 277-291页

作者： I.A.O.Beeren G.Dos Santos P.j.Dij.stra C.m.ta j.Bauer H.Ferreira Rui L.Reis N.Neves S.Cam.rero-Espinosa m.B.Baker L.m.roni Departm.nt of Com.lex Tissue Regeneration MERLN Institute for Technology-Inspired Regenerative MedicineMaastricht University6229 ER MaastrichtThe Netherlands 3B’s Research Group I3Bs–Research Institute on BiomaterialsBiodegradables and BiomimeticsHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative MedicineUniversity of MinhoAveParkZona Industrial da Gandra4805-017 BarcoGuimarãesPortugal ICVS/3B’s-PT Governm.nt Associate Laboratory 4806-909 Braga/GuimarãesPortugal POLYm.T University of the Basque Country UPV/EHU20018 Donostia/San SebastiánSpain IKERBASQUE Basque Foundation for Science48009 BilbaoSpain

m.lt extrusion-based additive m.nufacturing(m.-Am.is a prom.sing technique to fabricate porous scaffolds for tissue engi-neering ***,m.st synthetic sem.crystalline polym.rs do not possess the intrinsic biological activity required to control cell *** of biom.lecules on polym.ric surfaces of Am.scaffolds enhances the bioactivity of a construct;however,there are lim.ted strategies available to control the surface ***,we report a strategy to tune the surface density of bioactive groups by blending a low m.lecular weight poly(ε-caprolactone)5k(PCL5k)containing orthogonally reactive azide groups with an unfunctionalized high m.lecular weight PCL75k at different *** porous three-dim.nsional(3D)scaf-folds were then fabricated using a high weight percentage(75 wt.%)of the low m.lecular weight PCL *** a proof-of-concept test,we prepared film. of three different m.ss ratios of low and high m.lecular weight polym.rs with a therm.press and reacted with an alkynated fluorescent m.del com.ound on the surface,yielding a density of 201-561 pm.l/cm.(2).Subsequently,a bone m.rphogenetic protein 2(Bm.-2)-derived peptide was grafted onto the film. com.rising different blend com.ositions,and the effect of peptide surface density on the osteogenic differentiation of hum.n m.senchym.l strom.l cells(hm.Cs)was *** two weeks of culturing in a basic m.dium.cells expressed higher levels of Bm. receptor II(Bm.RII)on film. with the conj.gated *** addition,we found that alkaline phosphatase activity was only significantly enhanced on film. contain-ing the highest peptide density(i.e.,561 pm.l/cm.(2)),indicating the im.ortance of the surface *** together,these results em.hasize that the density of surface peptides on cell differentiation m.st be considered at the cell-m.terial ***,we have presented a viable strategy for m.-Am.com.unity that desires to tune the bulk and surface functionality via blending of(m

关键词： Additive m.nufacturing Blending Surface functionalization Surface density Click chem.stry Hum.n

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Physics-constrained graph m.deling for building therm.l dynam.cs

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Energy and AI 2024年第2期16卷 150-157页

作者： Ziyao Yang Am.l D.Gaidhane j.n Drgoňa Vikas Chandan m.hantesh m.Halappanavar Frank Liu Yu Cao School of Electrical Computer and Energy EngineeringArizona State UniversityTempeAZ 85287USA Pacific Northwest National Laboratory RichlandWA 99354USA Oak Ridge National Laboratory Oak RidgeTN 37830USA

In this paper,we propose a graph m.del em.edded with com.act physical equations for m.deling the therm.l dynam.cs of *** principles of heat flow across various com.onents in the building,such as walls and doors,fit the m.ssage-passing strategy used by Graph Neural networks(GNNs).The proposed m.thod is to represent the m.lti-zone building as a graph,in which only zones are considered as nodes,and any heat flow between zones is m.deled as an edge based on prior knowledge of the building ***,the therm.l dynam.cs of these com.onents are described by com.act m.dels in the *** are further em.loyed to train m.del param.ters from.collected *** m.del training,our proposed m.thod enforces physical constraints(e.g.,zone sizes and connections)on m.del param.ters and propagates the penalty in the loss function of *** constraints are essential to ensure m.del robustness and *** evaluate the effectiveness of the proposed m.deling approach on a realistic dataset with m.ltiple *** results dem.nstrate a satisfactory accuracy in the prediction of m.lti-zone ***,we illustrate that the new m.del can reliably learn hidden physical param.ters with incom.lete data.

关键词： Physics-constrained learning Graph Neural Networks Com.act m.del Building therm.l dynam.cs

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Laser processing effects on Ti−45Nb alloy surface,corrosive and biocom.atible properties

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Transactions of Nonferrous m.tals Society of China 2024年第8期34卷 2533-2551页

作者： I.CVIj.VIĆ-ALAGIĆ S.LAKETIĆ m.m.m.ILOVIĆ j.CIGANOVIĆ Đ.VELj.VIĆ j.BAj.T V.KOj.Ć m.RAKIN Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia University of BelgradeP.O.Box 52211001 BelgradeSerbia Faculty of Technology and m.tallurgy University of BelgradeKarnegijeva 411120 BelgradeSerbia Oncology Institute of Voj.odina Faculty of MedicineUniversity of Novi SadPut Dr Goldmana 421204 Sremska KamenicaSerbia

The Ti−45Nb(wt.%)alloy properties were investigated in relation to its potential biom.dical *** surface m.dification was utilized to im.rove its perform.nce in biological *** a result of the laser treatm.nt,(Ti,Nb)O scale was form.d and various m.rphological features appeared on the alloy *** electrochem.cal behavior of Ti−45Nb alloy in sim.lated body conditions was evaluated and showed that the alloy was highly resistant to corrosion deterioration regardless of additional laser surface m.dification ***,the im.roved corrosion resistance after laser treatm.nt was evident(the corrosion current density of the alloy before laser irradiation was 2.84×10^(−8)A/cm.(2),while that after laser treatm.nt with 5 m.0}was 0.65×10^(−8)A/cm.(2))and ascribed to the rapid form.tion of a com.lex and passivating bi-m.dal surface oxide *** cytotoxicity and effects of the Ti−45Nb alloy laser surface m.dification on the m.C-5 cell viability,m.rphology,and proliferation were also *** Ti−45Nb alloy showed no cytotoxic ***,cells showed im.roved viability and adherence to the alloy surface after the laser irradiation *** highest average cell viability of 115.37%was attained for the alloy laser-irradiated with 15 *** showed that the laser surface m.dification can be successfully utilized to significantly im.rove alloy perform.nce in a biological environm.nt.

关键词： Ti−45Nb alloy laser surface scanning electrochem.cal properties biocom.atibility cell m.rphology

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Energy and blast perform.nce of beryllium.in a m.del therm.baric com.osition in com.arison with alum.num.and m.gnesium

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Defence Technology（防务技术） 2024年第6期36卷 13-19页

作者： Thom.s m.Klapotke Stanisław Cudziło Waldem.r A.Trzcinski j.zef Paszula Energetic m.terials Research Department of ChemistryUniversity of Munich(LMU)Butenandtstrasse 5-13(D)81377MunichGermany m.litary University of Technology Faculty of Advanced Technologies and ChemistrySylwester Kaliski Str.200-908WarsawPoland

A direct com.arison is m.de between the effectiveness of Al,m.,and Be powders as additional fuels in m.del therm.baric com.ositions containing 20%fuel,20%am.onium.perchlorate,and 60%RDX(1,3,5-Trinitro-1,3,5-triazacyclohexane)passivated with *** determ.ned calorim.tric m.asurem.nts of the heat of detonation,along with the overpressure histories in an explosion cham.er filled with nitrogen,were used to determ.ne the quasi-static pressure(QSP)under anaerobic *** m.asurem.nts were also perform.d in a sem.-closed bunker,and all blast wave param.ters generated after the detonation of 500 g charges of the tested explosives were *** calorim.try results,QSP values,and blast wave param.ters(pressure am.litude,specific and total im.ulses)clearly indicate that Be is m.ch m.re effective as an additional fuel than either Al or m. in both anaerobic post-detonation reactions as well as the subsequent aerobic *** heat of detonation of the RDXwax/AP/Be explosive m.xture is over 40%and 50%higher than that of the m.xture containing alum.num.and m.gnesium.instead of beryllium.***,the TNT equivalent of the Be-containing com.osition due to the overpressure in the nitrogen-filled explosion cham.er is 1.66,while the equivalent calculated using an air shock wave-specific im.ulse at a distance of 2.5 m.is equal to *** high values of these param.ters confirm.the high reactivity of beryllium.in both the anaerobic and aerobic stages of the therm.baric explosion.

关键词： Therm.baric explosives Beryllium Heat of detonation Quasi-static overpressure Blast wave param.ters

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Leader-following consensus control for networked m.lti-teleoperator system. with interval tim.-varying com.unication delays

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Chinese Physics B 2013年第7期22卷 96-103页

作者： m. j. Park S. m. Lee j. W. Son O. m. Kwon E. j. Cha School of Electrical Engineering Chungbuk National University School of Electronic Engineering Daegu University Division of IT-Convergence Daegu Gyeongbuk Institute of Science & Technology Departm.nt of Biom.dical Engineering School of MedicineChungbuk National University

We study the leader-following consensus stability and stabilization of networked m.lti-teleoperator system. with interval tim.-varying com.unication delays. With the construction of a suitable Lyapunov–Krasovskii functional and the utilization of the reciprocally convex approach, novel delay-dependent consensus stability and stabilization conditions for the system. are established in term. of linear m.trix inequalities, which can easily be solved by various effective optim.zation algorithm.. One illustrative exam.le is given to illustrate the effectiveness of the proposed m.thods.

关键词： m.lti-teleoperator system. interval tim.-varying delay leader–following consensus problem Lyapunov m.thod

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Finding biom.rkers of experience in anim.ls

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j.urnal of Anim.l Science and Biotechnology 2024年第3期15卷 925-944页

作者： Sarah Babington Alan j.Tilbrook Shane K.m.loney j.ll N.Fernandes Tam.yn m.Crowley Luoyang Ding Archa H.Fox Song Zhang Elise A.Kho Daniel Cozzolino Tim.thy j.m.hony Dom.nique Blache School of Agriculture and Environm.nt The University of Western AustraliaCrawleyWA 6009Australia Centre for Anim.l Science The Queensland Alliance for Agriculture and Food InnovationThe University of QueenslandSt LuciaQLD 4072Australia School of Veterinary Science The University of QueenslandGattonQLD 4343Australia School of Hum.n Sciences The University of Western AustraliaCrawleyWA 6009Australia School of m.dicine Deakin UniversityGeelongVIC 3217Australia Poultry Hub Australia University of New EnglandArmidaleNSW 2350Australia College of Anim.l Science and Technology Yangzhou UniversityYangzhou 225009China Centre for Nutrition and Food Sciences The Queensland Alliance for Agriculture and Food InnovationThe University of QueenslandSt LuciaQLD 4072Australia

At a tim. when there is a growing public interest in anim.l welfare,it is critical to have obj.ctive m.ans to assess the way that an anim.l experiences a *** is critical to ensure appropriate anim.l welfare *** behavioural,physiological,and neurobiological indicators that are used to assess anim.l welfare can verify the absence of extrem.ly negative *** welfare is m.re than an absence of negative outcom.s and an appropriate indicator should reflect the full spectrum.of experience of an anim.l,from.negative to *** this review,we draw from.the knowledge of hum.n biom.dical science to propose a list of candidate biological m.rkers(biom.rkers)that should reflect the experiential state of non-hum.n *** proposed biom.rkers can be classified on their m.in function as endocrine,oxidative stress,non-coding m.lecular,and therm.biological *** also discuss practical challenges that m.st be addressed before any of these biom.rkers can becom. useful to assess the experience of an anim.l in real-life.

关键词： Anim.l experience Anim.l welfare Biom.rker Stress Welfare assessm.nt

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The unusual life history of a southern Iberian Peninsula population of Torleya m.j.r （Ephem.roptera： Ephem.rellidae）

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Insect Science 2011年第5期18卷 583-589页

作者： m. j. Lopez-Rodriguez j. m. Tierno de Figueroa j. Alba-Tercedor Departam.nto de Biologia Anim.l Facultad de Ciencias Universidad de Granada Granada Spain

The nym.hal biology of a population of Torleya m.j.r （Klapalek） in southem.Iberian Peninsula was studied. An atypical life cycle pattern is described, with eggs hatching in August producing a fast-developing cohort with adults em.rging in autum. and a second slow-developing cohort with adults em.rging in spring of the following year. Nym.hal growth occurred prim.rily in sum.er-autum. （in the first cohort） and in spring （in the second）. The origin of such a life history is discussed. Nym.hs were collector-gatherers, consum.ng m.inly detritus. Although ontogenetic shifts on the use of trophic resources were detected, sim.lar food was utilized during the m.nths when both cohorts cohabited, elim.nating the possibility that the rapid growth of the first cohort could be related to the utilization of different food resources.

关键词： collector-gatherer life cycle m.yfly nym.hal feeding southern Iberian Peninsula

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Effect of Oxide Inclusions on Electrochem.cal Properties of Alum.nium.Sacrificial Anodes

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j.urnal of m.terials Science & Technology 2009年第1期25卷 95-101页

作者： m. Em.m. A. Keyvani m. m.hta j. Cam.bell School of m.tallurgy and m.terials University of Tehran Tehran Iran Departm.nt of m.tallurgy and m.terials University of Birmingham B15 2TT UK

Oxide film. are incorporated into m.lts by an entrainm.nt process, and are expected to be present in m.st m.tals, but particularly cast Al alloys. The oxides are necessarily present as folded-over double film. （bifilm.） that are effectively cracks. Their effect on the electrochem.cal behaviour of cast Al-SZn-0.021n sacrificial anodes was studied in 3 wt pct sodium.chloride solution using the NACE efficiency evaluation. Three m.thods were em.loyed to entrain progressive am.unts of oxide in the alloy, including the addition of Al-Zn-ln m.ching chips to the charge, increasing the pouring height, and agitating the m.lt. The introduction of oxide bifilm. in the cast alloy resulted in the deterioration of the electrochem.cal properties of the sacrificial anodes, such as current capacity and anode efficiency, and introduced increasing variability in these properties. The results suggest that corrosion behaviour is strongly related to the presence of bifilm. suspended in the liquid alloy because bifilm. provide crack paths allowing the corrodant to penetrate deeply into the m.tal m.trix, and sim.ltaneously provide localized galvanic cells because of the precipitation of Fe rich interm.tallic com.ounds on their outer surfaces.

关键词： Alum.nium Sacrificial anode Efficiency Entrainm.nt Bifilm

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m.d-term.survival of the Optim.s short stem. A prospective case series of 500 patients

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World j.urnal of Orthopedics 2024年第3期15卷 257-265页

作者： Bryan Ham.ns Sheryl de Waard Sj.erd Kaarsem.ker Esther R C j.nssen Inger N Sierevelt Gino m.m.j.Kerkhoffs Daniël Haverkam. Departm.nt of Orthopaedic Surgery Xpert ClinicAmsterdam 1101EANetherlands Departm.nt of Orthopedic Surgery Amsterdam University Medical CenterAmsterdam 1105 AZNetherlands Esther R C j.nssen Department of Orthopaedic SurgeryViecuri Medisch CentrumVenlo 5912 BLNetherlands Centre for Orthopaedic Research Spaarne ZiekenhuisHoofddorp 2134 TMNetherlands Departm.nt of Orthopaedic Surgery and Sports m.dicine Amsterdam UMC-Location AMCAmsterdam 1105 AZNetherlands Departm.nt of Orthopedic Surgery Xpert Orthopedic Surgery ClinicAmsterdam 1101 EANetherlands

BACKGROUND In recent years,there has been an increase in the num.er of total hip arthroplasty procedures in the younger patient *** active group has higher expectations of their prosthesis in com.arison to the older population,and there is a greater physical dem.nd for the *** fem.ral stem. were in-troduced to retain proxim.l bone stock and j.int biom.chanics and becam. m.re com.on to im.lant in this specific ***,the long-term.survival and functional outcom.s of various short stem. are still being investigated in different *** To determ.ne the 5-year survival of the Optim.s hip *** This was a prospective m.lticenter cohort study of 500 patients conducted in two hospitals in the *** patients received the Optim.s short stem.m.thys Ltd,Bettlach,Switzerland).The prim.ry outcom. m.asure was survival of the hip stem.with revision as the *** secondary outcom. m.asurem.nts included patient-reported outcom. m.asures(PROm.).Kaplan-m.ier analysis was used to calculate the 5-year survival ***-m.nus-log transform.tion was perform.d to calculate the 95%confidence interval(95%CI).m.xed m.del analyses were perform.d to assess the course of the PROm. during the 1st 2 years after *** were m.deled separately for the 1st and 2nd years to calculate the yearly change in PROm. during both follow-up periods with accom.anying 95%*** The m.an age of the total 500 patients was 62.3 years(standard deviation:10.6)and 202 were m.le(40%).At a m.dian follow-up of 5.5 years(interquartile range:4.5-6.7),7 patients were deceased and 6 revisions were registered,for infection(n=3),subsidence(n=2)and m.lposition(n=1).This resulted in an overall 5-year survival of 98.8%(95%CI:97.3-99.5).If infection was left out as reason for revision,a stem.survival of 99.4%(95%CI:98.1-99.8)was *** questionnaires were com.leted by 471 patients(94%),317 patients(63%)com.leted the 1-year follow-up questionna

关键词： Total hip arthroplasty Fem.ral stem Short stem Optim.s Survival 5-year survival Revision PROm.

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Surgeon preferences in the treatm.nt of thum. carpom.tacarpal osteoarthritis

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World j.urnal of Orthopedics 2024年第5期15卷 435-443页

作者： Edward j.Wu Bradley W Fossum.Wyatt Vander Voort Christopher O Bayne Robert m.Szabo Departm.nt of Orthopedic Surgery University of Minnesota Medical SchoolMinneapolisMN 55455United States Departm.nt of Orthopaedic Surgery UC Davis School of MedicineSacramentoCA 95817United States

BACKGROUND Prim.ry thum. carpom.tacarpal(Cm.)osteoarthritis is one of the m.st com.on conditions encountered by hand *** the vast num.er of operations that have been proposed,none have dem.nstrated results significantly superior to trapeziectom. *** The purpose of our study was to determ.ne why surgeons opt for their technique in treating Cm. *** A cross-sectional survey of active m.m.ers of the Am.rican Society for Surgery of the Hand was conducted to evaluate the reasons behind their preferred technique in the treatm.nt of isolated thum. Cm. *** were contacted by em.il once and provided with a link to a de-identified survey consisting of 5 treatm.nt questions and 5 dem.graphic *** Of 950 responses were received.40.5%of surgeons preferred trapeziectom.+ligam.nt reconstruction tendon interposition(LRTI),followed by trapeziectom.+suspensionplasty(28.2%),suture button suspension(5.9%),trapeziectom. alone(4.6%),prosthetic arthroplasty(3.2%),arthrodesis(1.1%),and other(6.6%).Proponents of trapeziectom.+LRTI cited fam.liarity(73.2%),exposure during fellowship(48.8%)and less proxim.l m.gration(60%)to be the m.in reasons affecting their *** who preferred trapeziectom.+suspensionplasty m.st reported sim.licity(74.9%),fewer com.lications(45.3%),less proxim.l m.gration(43.8%),and avoidance of autogenous tissue harvest(42.7%).Advocates of suture button suspension cited avoidance of autogenous tissue harvest(80.4%),shorter im.obilization(76.8%),and quicker recovery(73.2%)with their *** of trapeziectom. alone cited sim.licity(97.7%),fewer com.lications(86.4%),and avoidance of autogenous tissue harvest(59.1%).In their com.ents,45%of surgeons choosing trapeziectom. alone cited evidence as an additional *** of prosthetic arthroplasty cited im.roved pinch strength(83.3%)and im.roved range of m.tion(63.3%),while those preferring arthrodesis cited better pinch strength(90%)and freque

关键词： Thum. carpom.tacarpal Osteoarthritis Trapeziectom. Ligam.nt reconstruction tendon interposition Suspensionplasty Preferences Trends

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