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A facile strategy for tuning the density of surface-grafted biomolecules for melt extrusion-based additive manufacturing applications

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Bio-Design and manufacturing 2024年第3期7卷 277-291页

作者： I.A.O.Beeren G.Dos Santos P.j.Dijkstra C.mota j.Bauer H.Ferreira Rui L.Reis N.Neves S.Camarero-Espinosa m.B.Baker L.moroni Department of Complex 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 Government Associate Laboratory 4806-909 Braga/GuimarãesPortugal POLYmAT University of the Basque Country UPV/EHU20018 Donostia/San SebastiánSpain IKERBASQUE Basque Foundation for Science48009 BilbaoSpain

melt extrusion-based additive manufacturing(mE-Am)is a promising technique to fabricate porous scaffolds for tissue engi-neering ***,most synthetic semicrystalline polymers do not possess the intrinsic biological activity required to control cell *** of biomolecules on polymeric surfaces of Am scaffolds enhances the bioactivity of a construct;however,there are limited strategies available to control the surface ***,we report a strategy to tune the surface density of bioactive groups by blending a low molecular weight poly(ε-caprolactone)5k(PCL5k)containing orthogonally reactive azide groups with an unfunctionalized high molecular weight PCL75k at different *** porous three-dimensional(3D)scaf-folds were then fabricated using a high weight percentage(75 wt.%)of the low molecular weight PCL *** a proof-of-concept test,we prepared films of three different mass ratios of low and high molecular weight polymers with a thermopress and reacted with an alkynated fluorescent model compound on the surface,yielding a density of 201-561 pmol/cm^(2).Subsequently,a bone morphogenetic protein 2(BmP-2)-derived peptide was grafted onto the films comprising different blend compositions,and the effect of peptide surface density on the osteogenic differentiation of human mesenchymal stromal cells(hmSCs)was *** two weeks of culturing in a basic medium,cells expressed higher levels of BmP receptor II(BmPRII)on films with the conjugated *** addition,we found that alkaline phosphatase activity was only significantly enhanced on films contain-ing the highest peptide density(i.e.,561 pmol/cm^(2)),indicating the importance of the surface *** together,these results emphasize that the density of surface peptides on cell differentiation must be considered at the cell-material ***,we have presented a viable strategy for mE-Am community that desires to tune the bulk and surface functionality via blending of(m

关键词： Additive manufacturing Blending Surface functionalization Surface density Click chemistry Human

Energy and blast performance of beryllium in a model thermobaric composition in comparison with aluminum and magnesium

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

作者： Thomas m.Klapotke Stanisław Cudziło Waldemar A.Trzcinski jozef Paszula Energetic materials Research Department of ChemistryUniversity of Munich(LMU)Butenandtstrasse 5-13(D)81377MunichGermany military University of Technology Faculty of Advanced Technologies and ChemistrySylwester Kaliski Str.200-908WarsawPoland

A direct comparison is made between the effectiveness of Al,mg,and Be powders as additional fuels in model thermobaric compositions containing 20%fuel,20%ammonium perchlorate,and 60%RDX(1,3,5-Trinitro-1,3,5-triazacyclohexane)passivated with *** determined calorimetric measurements of the heat of detonation,along with the overpressure histories in an explosion chamber filled with nitrogen,were used to determine the quasi-static pressure(QSP)under anaerobic *** measurements were also performed in a semi-closed bunker,and all blast wave parameters generated after the detonation of 500 g charges of the tested explosives were *** calorimetry results,QSP values,and blast wave parameters(pressure amplitude,specific and total impulses)clearly indicate that Be is much more effective as an additional fuel than either Al or mg in both anaerobic post-detonation reactions as well as the subsequent aerobic *** heat of detonation of the RDXwax/AP/Be explosive mixture is over 40%and 50%higher than that of the mixture containing aluminum and magnesium instead of beryllium,***,the TNT equivalent of the Be-containing composition due to the overpressure in the nitrogen-filled explosion chamber is 1.66,while the equivalent calculated using an air shock wave-specific impulse at a distance of 2.5 m is equal to *** high values of these parameters confirm the high reactivity of beryllium in both the anaerobic and aerobic stages of the thermobaric explosion.

关键词： Thermobaric explosives Beryllium Heat of detonation Quasi-static overpressure Blast wave parameters

Finding biomarkers of experience in animals

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journal of Animal Science and Biotechnology 2024年第3期15卷 925-944页

作者： Sarah Babington Alan j.Tilbrook Shane K.maloney jill N.Fernandes Tamsyn m.Crowley Luoyang Ding Archa H.Fox Song Zhang Elise A.Kho Daniel Cozzolino Timothy j.mahony Dominique Blache School of Agriculture and Environment The University of Western AustraliaCrawleyWA 6009Australia Centre for Animal 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 Human Sciences The University of Western AustraliaCrawleyWA 6009Australia School of medicine Deakin UniversityGeelongVIC 3217Australia Poultry Hub Australia University of New EnglandArmidaleNSW 2350Australia College of Animal 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 time when there is a growing public interest in animal welfare,it is critical to have objective means to assess the way that an animal experiences a *** is critical to ensure appropriate animal welfare *** behavioural,physiological,and neurobiological indicators that are used to assess animal welfare can verify the absence of extremely negative *** welfare is more than an absence of negative outcomes and an appropriate indicator should reflect the full spectrum of experience of an animal,from negative to *** this review,we draw from the knowledge of human biomedical science to propose a list of candidate biological markers(biomarkers)that should reflect the experiential state of non-human *** proposed biomarkers can be classified on their main function as endocrine,oxidative stress,non-coding molecular,and thermobiological *** also discuss practical challenges that must be addressed before any of these biomarkers can become useful to assess the experience of an animal in real-life.

关键词： Animal experience Animal welfare Biomarker Stress Welfare assessment

Extreme Antarctic Cold of Late Winter 2023

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Advances in Atmospheric Sciences 2024年第10期41卷 1873-1880页

作者： Anastasia j.TOmANEK David E.mIKOLAjCZYK matthew A.LAZZARA Stefano DI BATTISTA minghu DING mariana FONTOLAN LITELL David H.BROmWICH Taylor P.NORTON Linda m.KELLER Lee j.WELHOUSE Antarctic meteorological Research and Data Center Space Science and Engineering CenterUniversity of Wisconsin-MadisonMadisonWisconsin 53706USA Department of Physical Sciences School of EngineeringScienceand MathematicsMadison Area Technical CollegeMadisonWisconsin 53704USA meteogiornale via Paolo Diacono9Milano 20133Italy State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesBeijing 100081China Byrd Polar and Climate Research Center The Ohio State UniversityColumbusOhio 43210USA Department of Geography The Ohio State UniversityColumbusOhio 43210USA

Extreme cold temperatures were observed in july and August 2023,coinciding with the WINFLY(winter fly-in)period of mid to late August into September 2023,meaning aircraft operations into mcmurdo Station and Phoenix Airfield were adversely ***,with temperatures below−50℃,safe flight operation was not possible because of the risk of failing hydraulics and fuel turning to gel onboard the *** cold temperatures were measured across a broad area of the Antarctic,from East Antarctica toward the Ross Ice Shelf,and stretching across West Antarctica to the Antarctic Peninsula.A review of automatic weather station measurements and staffed station observations revealed a series of sites recording new record low *** separate cold phases were identified,each a few days in duration and occurring from mid-july to the end of August 2023.A brief analysis of 500-hPa geopotential height anomalies shows how the mid-tropospheric atmospheric environment evolves in relation to these extreme cold *** monthly 500-hPa geopotential height anomalies show strong negative anomalies in *** of composite geopotential height anomalies during each of the four cold phases suggests various factors leading to cold temperatures,including both southerly off-content flow and calm atmospheric *** the atmospheric environment that leads to such extreme cold temperatures can improve prediction of such events and benefit Antarctic operations and the study of Antarctic meteorology and climatology.

关键词： Antarctica extreme cold temperature automatic weather station networks

mid-term survival of the Optimys short stem: A prospective case series of 500 patients

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World journal of Orthopedics 2024年第3期15卷 257-265页

作者： Bryan Hamans Sheryl de Waard Sjoerd Kaarsemaker Esther R C janssen Inger N Sierevelt Gino m m j Kerkhoffs Daniël Haverkamp Department of Orthopaedic Surgery Xpert ClinicAmsterdam 1101EANetherlands Department of Orthopedic Surgery Amsterdam University Medical CenterAmsterdam 1105 AZNetherlands Esther R C janssen Department of Orthopaedic SurgeryViecuri Medisch CentrumVenlo 5912 BLNetherlands Centre for Orthopaedic Research Spaarne ZiekenhuisHoofddorp 2134 TMNetherlands Department of Orthopaedic Surgery and Sports medicine Amsterdam UMC-Location AMCAmsterdam 1105 AZNetherlands Department of Orthopedic Surgery Xpert Orthopedic Surgery ClinicAmsterdam 1101 EANetherlands

BACKGROUND In recent years,there has been an increase in the number of total hip arthroplasty procedures in the younger patient *** active group has higher expectations of their prosthesis in comparison to the older population,and there is a greater physical demand for the *** femoral stems were in-troduced to retain proximal bone stock and joint biomechanics and became more common to implant in this specific ***,the long-term survival and functional outcomes of various short stems are still being investigated in different *** To determine the 5-year survival of the Optimys hip *** This was a prospective multicenter cohort study of 500 patients conducted in two hospitals in the *** patients received the Optimys short stem(mathys Ltd,Bettlach,Switzerland).The primary outcome measure was survival of the hip stem,with revision as the *** secondary outcome measurements included patient-reported outcome measures(PROms).Kaplan-meier analysis was used to calculate the 5-year survival ***-minus-log transformation was performed to calculate the 95%confidence interval(95%CI).mixed model analyses were performed to assess the course of the PROms during the 1st 2 years after *** were modeled separately for the 1st and 2nd years to calculate the yearly change in PROms during both follow-up periods with accompanying 95%*** The mean age of the total 500 patients was 62.3 years(standard deviation:10.6)and 202 were male(40%).At a median 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 malposition(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 completed by 471 patients(94%),317 patients(63%)completed the 1-year follow-up questionna

关键词： Total hip arthroplasty Femoral stem Short stem Optimys Survival 5-year survival Revision PROms

Surgeon preferences in the treatment of thumb carpometacarpal osteoarthritis

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World journal 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 Department of Orthopedic Surgery University of Minnesota Medical SchoolMinneapolisMN 55455United States Department of Orthopaedic Surgery UC Davis School of MedicineSacramentoCA 95817United States

BACKGROUND Primary thumb carpometacarpal(CmC)osteoarthritis is one of the most common conditions encountered by hand *** the vast number of operations that have been proposed,none have demonstrated results significantly superior to trapeziectomy *** The purpose of our study was to determine why surgeons opt for their technique in treating CmC *** A cross-sectional survey of active members of the American Society for Surgery of the Hand was conducted to evaluate the reasons behind their preferred technique in the treatment of isolated thumb CmC *** were contacted by email once and provided with a link to a de-identified survey consisting of 5 treatment questions and 5 demographic *** Of 950 responses were received.40.5%of surgeons preferred trapeziectomy+ligament reconstruction tendon interposition(LRTI),followed by trapeziectomy+suspensionplasty(28.2%),suture button suspension(5.9%),trapeziectomy alone(4.6%),prosthetic arthroplasty(3.2%),arthrodesis(1.1%),and other(6.6%).Proponents of trapeziectomy+LRTI cited familiarity(73.2%),exposure during fellowship(48.8%)and less proximal migration(60%)to be the main reasons affecting their *** who preferred trapeziectomy+suspensionplasty most reported simplicity(74.9%),fewer complications(45.3%),less proximal migration(43.8%),and avoidance of autogenous tissue harvest(42.7%).Advocates of suture button suspension cited avoidance of autogenous tissue harvest(80.4%),shorter immobilization(76.8%),and quicker recovery(73.2%)with their *** of trapeziectomy alone cited simplicity(97.7%),fewer complications(86.4%),and avoidance of autogenous tissue harvest(59.1%).In their comments,45%of surgeons choosing trapeziectomy alone cited evidence as an additional *** of prosthetic arthroplasty cited improved pinch strength(83.3%)and improved range of motion(63.3%),while those preferring arthrodesis cited better pinch strength(90%)and freque

关键词： Thumb carpometacarpal Osteoarthritis Trapeziectomy Ligament reconstruction tendon interposition Suspensionplasty Preferences Trends

Entropy generation minimization in the Carreau nanofluid flow over a convectively heated inclined plate with quadratic thermal radiation and chemical reaction:A Stefan blowing application

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Propulsion and Power Research 2024年第2期13卷 233-244页

作者： B.Lavanya j.Girish Kumar m.jayachandra Babu C.S.K.Raju Bander Almutairi Nehad Ali Shah Department of mathematics Manipal Institute of TechnologyManipal Academy of Higher EducationManipalKarnataka 576104India Department of mathematics S.V.A Government CollegeSrikalahasti 517644India Department of mathematics GITAM School of Science(GSS)GITAMBangaloreKarnatakaIndia Department of mathematics College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia Department of mechanical Engineering Sejong UniversitySeoul 05006South Korea

Entropy analysis can help to identify the sources of entropy generation in a heat transfer process more accurately than other methods,such as energy efﬁciency *** is because entropy analysis takes into account the quality of energy as well as its ***-noﬂuids have already been shown to have superior heat transfer characteristics compared to conventionalﬂ*** blowing can further enhance the heat transfer capabilities of nano-ﬂuids by increasing the massﬂux and turbulence at the *** can be beneﬁcial in a wide range of applications,such as heat exchangers,electronic cooling,and solar energy *** convective boundary condition accounts for heat transfer effects,inﬂuencing temperature distribution and the thermal boundary *** on the direction of heat transfer,the convective boundary condition can induce cooling or heating effects on the inclined *** has practical implications for various engineering applications,such as the cooling of electronic devices or heating in industrial *** nanofluids have a wide range of potential applications in heat transfer,energy storage,drug delivery,and food *** research investigates how the presence of Stefan blowing affects the properties of Carreau nanofluid flow across a convectively heated tilted *** and mass transport phenomena are studied using quadratic thermal radiation and chemical reaction *** mathematical model for this work is based on the Buongiorno *** governing equations are converted into a system of ordinary differential equations and then solved using the bvp4c *** parameters such as the mass transfer rate can be visualized using bar *** study’s primary findings are that when the weissenberg number increases,the velocity rises and the concentration profile declines due to Brownian *** is discovered that,when 0.5≤γ≤3(the inverse porosity parameter),the friction factor declines by 0.34001(

关键词： Thermal radiation BVP4C Stefan blowing Biot number Brownian motion Irreversibilit

Chronic disease patients have fewer social contacts:A pilot survey with implications for transmission dynamics

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Infectious Disease modelling 2024年第3期9卷 926-930页

作者： j.Vanderlocht S.møgelmose K.Van Kerckhove P.Beutels N.Hens Interuniversity Institute of Biostatistics and Statistical Bioinformatics Data Science InstituteHasselt UniversityHasseltBelgium Centre for Health Economic Research and modelling Infectious Diseases University of AntwerpAntwerpBelgium

Non-communicable diseases(NCD)are the most important cause of death in the *** socio-economic costs associated with NCDs makes it imperative to prevent and control them in the 21st *** severe toll that the COVID-19 pandemic has taken worldwide is an unfortunate illustration of our limited insight into the infectious risk for the global ***-incidence between NCD and infection offers an underexplored opportunity to design preventive *** a pilot survey,we observed that the NCD population displays a substantial reduction in their social contacting behavior as compared to the general *** indicates that existing mathematical models based on contact surveys in the general population are not applicable to the NCD population and that the risk of acquiring an infection following a contact is probably *** demonstration of reduced social mixing in several chronic conditions,raises the question to what extent the social mixing is influenced by the burden of *** advocate the design of disease-specific contact surveys to address how the burden of disease associates with social contact behavior and the risk of *** SARS-CoV-2 pandemic offers an unprecedented opportunity to gain insight into the importance of infection in the NCD population and to find ways to improve healthcare procedures.

关键词： survey mixing insight

miniSCIDOm: a scintillator-based tomograph for volumetric dose reconstruction of single laser-driven proton bunches

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High Power Laser Science and Engineering 2024年第2期12卷 41-50页

作者： A.Corvino m.Reimold E.Beyreuther F.-E.Brack F.Kroll j.Pawelke j.D.Schilz m.Schneider U.Schramm m.E.P.Umlandt K.Zeil T.Ziegler j.metzkes-Ng Helmholtz-Zentrum Dresden–Rossendorf DresdenGermany Technische Universität Dresden DresdenGermany OncoRay–National Center for Radiation Research in Oncology Faculty of Medicine and University Hospital Carl Gustav CarusTUD Dresden University of TechnologyHelmholtz-Zentrum Dresden–RossendorfDresdenGermany Current affiliation:Institut Curie UniversitéPSLCNRS UMR3347OrsayFrance Current affiliation:Universitätsklinikum Freiburg FreiburgGermany

Laser plasma accelerators(LPAs)enable the generation of intense and short proton bunches on a micrometre scale,thus offering new experimental capabilities to research fields such as ultra-high dose rate radiobiology or material *** spectrally broadband,laser-accelerated proton bunches allow for tailored volumetric dose deposition in a sample via single bunches to excite or probe specific sample *** rising number of such experiments indicates a need for diagnostics providing spatially resolved characterization of dose distributions with volumes of approximately 1 cm^(3) for single proton bunches to allow for fast online *** we present the scintillator-based miniSCIDOm detector for online single-bunch tomographic reconstruction of dose distributions in volumes of up to approximately 1 cm^(3).The detector achieves a spatial resolution below 500μm and a sensitivity of 100 *** detector performance is tested at a proton therapy cyclotron and an LPA proton *** experiments’primary focus is the characterization of the scintillator’s ionization quenching behaviour.

关键词： beam monitoring detectors laser-driven proton beams scintillator-based diagnostics ultra-high dose rate