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An oxygenating colloidal bioink for the engineering of biomimetic tissue constructs

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Bio-Design and Manufacturing 2024年第3期7卷 240-261页

作者： Seol-Ha Jeong Jarno Hiemstra Patrick V.Blokzijl Rebeca Damian-Ferrara Danilo Martins dos Santos Jéssica H.L.da Fonseca Min-Ho Kang Jihyun Kim Dilara yilmaz-Aykut Mei L.L.Cham-Pérez Jeroen Leijten Su Ryon Shin Division of Engineering in Medicine Department of MedicineBrigham and Women’s HospitalHarvard Medical SchoolBostonMA 02139USA Leijten Lab Department of Developmental BioEngineeringFaculty of Science and TechnologyTechnical Medical CentreUniversity of TwenteDrienerlolaan 57522 NB EnschedeThe Netherlands Nanotechnology National Laboratory for Agriculture(LNNA) Embrapa InstrumentaçãoSao CarlosSao Paulo 13560-970Brazil Department of Biomedical-Chemical Engineering The Catholic University of Korea43 Jibong-roBucheon-siGyeonggi-do 14662Republic of Korea Department of Biotechnology The Catholic University of Korea43 Jibong-roBucheon-siGyeonggi-do 14662Republic of Korea

Ensuring a sufficient oxygen supply is pivotal for the success of bioprinting applications since it fosters tissue integration and natural *** in oxygen concentration among diverse tissues necessitates the precise recreation of tissue-specific oxygen levels in imprinted constructs to support the survival of targeted *** oxygen-releasing biomaterials,such as oxygen-generating microparticles(oMPs),have shown promise for enhancing the oxygen supply of microenvironments in injured tissues,whether this approach is scalable for large tissues and whether tissue-specific bioinks with varying oMP concentrations remain printable remain *** study addresses this critical gap by introducing an innovative class of engineered oxygenated bioinks that combine colloidal-based microgels with *** report that incorporating nanosized calcium peroxide(nCao_(2))and manganese oxide nanosheets(nMno_(2))into hydrophobic polymeric microparticles enables precise modulation of oxygen release while controlling hydrogen peroxide ***,the fabrication of oxygenating and cytocompatible colloidal gels is achieved using an aqueous two-phase *** study thoroughly evaluates the fundamental characteristics of the resulting bioink,including its rheological behaviors,printability,shape fidelity,mechanical properties,and oxygen release ***,this study demonstrates the macroscopic scalability and cytocompatibility of printed constructs produced via cell-laden oxygenating colloidal *** showcasing the effectiveness of extrusion-based bioprinting,this study underscores how it can be used to fabricate biomimetic tissues,indicating its potential for new *** findings presented here advance the bioprinting field by achieving scalability with both high cell viability and the possibility of mimicking specifically oxygenated *** work thereby offers a promising avenue for the development of functional tissues with e

关键词： 3D bioprinting Bioink Colloidal gels Extrusion printing oxygen-generating microparticle

A comprehensive study of hydrogen production from ammonia borane via PdCoAg/AC nanoparticles and anodic current in alkaline medium:experimental design with response surface methodology

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Frontiers in Energy 2020年第3期14卷 578-589页

作者： Hilal celik KAZICI Sakir yilmaz Tekin SAHAN Fikret YILDIZ omer Faruk ER Hilal KIVRAK Department of Chemical Engineering Faculty of EngineeringVan Yiizuncii Yil University65080 VanTurkey

In this paper,the optimization of hydrogen(H2)production by ammonia borane(NH3BH3)over PdCoAg/AC was investigated using the response surface ***,the electro-oxidation of NH3BH3 was determined and optimized using the same method to measure its potential use in the direct ammonium boran fuel ***,the ternary alloyed catalyst was synthesized using the chemical reduction *** synergistic effect between Pd,Co and Ag plays an important role in enhancement of NH3BH3 *** addition,the support effect could also efficiently improve the catalytic ***,the effects of NH3BH3 concentration(0.1-50 mmol/5 mL),catalyst amount(1-30 mg)and temperature(20℃-50℃)on the rate of H2 production and the effects of temperature(20℃-50℃),NH3BH3 concentration(0.05-1 mol/L)and catalyst amount(0.5-5 jiL)on the electro-oxidation reaction of NH3BH3 were investigated using the central composite design experimental *** implementation of the response surface methodology resulted in the formulation of four models out of which the quadratic model was adjudged to efficiently appropriate the experimental data.A further statistical analysis of the quadratic model demonstrated the significance of the model with a pvalue far less than 0.05 for each model and coefficient of determination(R2)of 0.85 and 0.95 for H2 production rate and NH3BH3 electrroxidation peak current,respectively.

关键词： ammonia borane hydrogen production fuel cell response surface methodology

Structural and superconducting properties in Y_(0.6)Gd_(0.4)Ba_2(Nb)Cu_3o_(7-y) cuprates doped with niobium

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Journal of Rare Earths 2012年第3期30卷 241-244页

作者： M. yilmaz o. Dogan A. K. Education Faculty Department of Physics Konya University

Polycrystalline YBa2Cu3o7-y （YBCo） and Y0.6Gd0.4Ba2-xNbxCu3o7-y （YGBNCo） compounds with 0≤x≤0.225 were synthesized using standard solid state reaction technique. The structure for all samples was characterized by X-ray difference （XRD） and scanning electron microscopy （SEM）. The transport properties were measured by the （FPP） method in the temperature range from 70 to 130 K. As the Nb content in the samples increased, a diffused phase indicating a niobium perovskite phase and a small amount of unidentified phase appeared. With the increase of Nb content, the superconducting transition temperature Tconset increased slowly with x≤0.125, and then it remained unchanged or slowly decreased with 0.125≤x≤0.225. It could be found that there was a slow decrease of zero-resistance temperature, Tcoffset, with the increase of Nb content. The larger transition width might result from the YBa2Nbo6 phase, impurity and unidentified phases of the sample due to the Nb doping.

关键词： Y0.6Gd0.4Ba2Cu3o7-y cuprates Gd and Nb co-doping structural and superconducting properties rare earths

Effect of acupressure on procedural pain before heel lancing in neonates

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Journal of Traditional Chinese Medicine 2021年第2期41卷 331-337页

作者： Tanju oğul Fatma yilmaz Kurt Research Assistant RNMSNFaculty of Health SciencesPediatric Nursing DepartmentCanakkale Onsekiz Mart UniversityCanakkale 17020Turkey

oBJECTIVE:To investigate the effect of acupressure applied to UB60 and K3 acupuncture points in order to relieve the procedural pain caused by heel lancing blood sampling process in the term ***:The data were collected by using the Information Form and the Neonatal Infant Pain *** applied for 3 min before heel lancing blood sampling in the newborns in the experimental group(n=31).No intervention was applied to newborns in the control group(n=32).RESULTS:A significant difference was found between mean scores of the newborns in the control and acupressure group in favor of the acupressure group in terms of heart rate during and after the procedure,oxygen saturation before,during and after the procedure,duration of crying during and after the procedure(Pound that there was a significant difference between groups in terms of Neonatal Infant Pain Scale mean scores during(P=0.001)and after the procedure(Pound to be in favor of the acupressure ***:As a result,acupressure was found to be an effective method in relieving pain caused by heel lancing blood sampling in newborns.

关键词： Acupressure Pain,procedural Infant,newborn Heel lancing blood sampling

Confirmation of a Sub-Saturn-size Transiting Exoplanet orbiting a G Dwarf:ToI-1194 b and a Very Low Mass Companion Star: ToI-1251 B from TESS

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Research in Astronomy and Astrophysics 2024年第3期24卷 129-143页

作者： Jia-Qi Wang Xiao-Jun Jiang Jie Zheng Hanna Kellermann Arno Riffeser Liang Wang Karen A.Collins Allyson Bieryla Lars A.Buchhave Steve B.Howell Elise Furlan Eric Girardin Joao Gregorio Eric Jensen Felipe Murgas Mesut yilmaz Sam Quinn Xing Gao Ruo-Yu Zhou Frank Grupp Hui-Juan Wang CAS Key Laboratory of optical Astronomy National Astronomical ObservatoriesChinese Academy Of SciencesBeijing 10010China University of Chinese Academy of Sciences Beijing 100049China University observatory Munich Scheinertrsse 1.D-81679 MunichGemany Max Planck Institute for Extraterrestrial Physics Giessenbachstr.1D-85748 GarchingGermany National Astronomical observatories/Nanjing Institute of Astronomical optics&Technology Chinese Academy of SciencesNanjing210042China CAS Key Laboratory of Astronomical optics&Technology Nanjing Institute of Astronomical Optics&TechnologyNanjing 210042China Center for Astrophysics Harvard&Smithsonian60 Garden Street.CambridgeMA 02138USA National Space Institute Technical University of DenmarkElektrovejDK-2800 KgsLyngbyDenmark NASA Ames Research Center Moffett FieldCA 94035USA NASA Exoplanet Science Institute Caltech/IPACMail Code 100-221200 E.California Blvd.PasadenaCA91125USA Grand Pra observatory Switzerland Department of Physics Washington UniversitySt.LouisMO 63130.USA Department of Physics and Astronomy Swarthmore CollegeSwarthmorePA 19081USA Instituto de Astrofísica de Canarias(IAC) E-38205 La Laguna.TenerifeSpain Departamento de Astrofísica Universidad de La LagunaSpain Dept.of Astronomy and Space Sciences Ankara UniversityTandogan 06100AnkaraTurkey Xinjiang Astronomical observatory Chinese Academy of SciencesUrumqi 830011China Urumqi No.1 Senior High School Urumqi 830002China Lijiang Gemini observatory Lijiang 674199China

We report the confirmation of a sub-Saturn-size exoplanet,ToI-1194 b,with a mass of about 0.456+0.055-0.051M_(J),and a very low mass companion star with a mass of about 96.5±1.5 MJ,ToI-1251 *** candidates provided by the Transiting Exoplanet Survey Satellite(TESS)are suitable for further follow-up observations by ground-based telescopes with small and medium *** analysis is performed based on data from several telescopes worldwide,including telescopes in the Sino-German multiband photometric campaign,which aimed at confirming TESS objects of Interest(ToIs)using ground-based small-aperture and medium-aperture telescopes,especially for long-period ***-1194 b is confirmed based on the consistent periodic transit depths from the multiband photometric *** measure an orbital period of 2.310644±0.000001 days,the radius is 0.767+0.045-0.041RJ and the amplitude of the RV curve is 69.4_(-7.3)^(+7.9)m s^(-1).ToI-1251 B is confirmed based on the multiband photometric and high-resolution spectroscopic data,whose orbital period is 5.963054+0.000002-0.000001days,radius is 0.947+0.035-0.033 R_(J) and amplitude of the RV curve is 9849_(-40)^(+42)ms^(-1).

关键词： planets and satellites fundamental parameters-planets and satellites gaseous planets-stars fundamental parameters-stars low-mass-methods data analysis-techniques photometric-techniques spectroscopic

ELECTRoRHEoLoGICAL PRoPERTIES oF TALC PoWDER/SILICoNE oIL SUSPENSIoNS UNDER DC FIELDS

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Chinese Journal of Polymer Science 2007年第3期25卷 245-252页

作者： Hasim yilmaz Ummihan yilmaz Chemistry Department Sciences FacultyHarran University63190 OsmanbeySanliurfaTurkey Chemistry Department Sciences FacultyGazi University06500 TeknikokullarAnkaraTurkey

In this study, the electrorheological （ER） behavior of suspensions prepared from d50 = 2.4 lam talc powder, dispersed in insulating silicone oil （So） medium was investigated. Sedimentation stabilities of suspensions （c = 5 wt%） prepared using these talc powder powders were determined to be 78 days. The ER activity of all the suspensions was observed to increase with increasing electric field strength, concentration and decreasing shear rate. The shear stress of talc powder suspensions increased linearly with increasing concentrations of the particles and with the applied electric field strength. Electric field viscosity of all the suspensions decreased sharply with increasing shear rate and showed a typical shear thinning non-Newtonian visco-elastic behavior. Effects of frequency on the ER activity of talc powder/So system were also investigated.

关键词： Electrorheological fluids Talc powder/silicone oil suspensions Shear stress

Compensating the effects of DC bias lines on terahertz photomixer antennas using resistively loaded lines

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红外与毫米波学报 2015年第4期34卷 420-426页

作者： Adem yilmaz Mehmet Unlu Electrical and Electronics Engineering Department Yildirim Beyazit University Ankara Turkey Cankiri Caddesi Cicek Sokak No: 3 Ulus Ankara 06030 Turkey

This paper proposed a method,namely resistively loaded lines(RLL),to compensate the effects of the DC bias lines after investigating its effects on several types of antennas for terahertz *** RLL is formed by placing lumped resistances periodically on the DC bias line in order to cease the leakage current virtually,w hich cause a significant amount of distortion on the antenna *** simulation results of the dipole,folded dipole,log-periodic,and spiral antennas show that RLL almost removes the effects of the bias lines and improves the antenna radiation resistance and radiation pattern notably compared w ith that of the commonly used bias line types,such as coplanar stripline and photonic bandgap type bias lines.

关键词：红外技术毫米波技术光电技术应用

△_(h)-GoULD-HoPPER APPELL PoLYNoMIALS

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Acta Mathematica Scientia 2021年第4期41卷 1196-1222页

作者： Mehmet Ali ÖZARSLAN Banu yilmaz YASAR Department of Mathematics Eastern Mediterranean UniversityFamagustaNorth Cyprus via Mersin 10Turkey

In this paper,we introduce the △_(h)-Gould-Hopper Appell polynomials An(x,y;h)via h-Gould-Hopper polynomials G_(n)^(h)(x,y).These polynomials reduces to △_(h)-Appell polynomials in the case y=0,△-Appell polynomials in the case y=0 and h=2D-Appell polynomials in the case h→0,2D △-Appell polynomials in the case h=1 and Appell polynomials in the case h→0 and y=*** obtain some well known main properties and an explicit form,determinant representation,recurrence relation,shift operators,difference equation,integro-difFerence equation and partial difference equation satisfied by *** satisfied by △_(h)-Gould-Hopper Appell polynomials reduce to determinant of all subclass of the usual ***,shift operators and difference equation satisfied by these polynomials reduce to recurrence,shift operators and difference equation of △_(h)-Appell polynomials,△-Appell polynomials;recurrence,shift operators,differential and integro-differential equation of 2D-Appell polynomials,recurrence,shift operators,integrodifference equation of 2D △-Appell polynomials,recurrence,shift operators,differential equation of Appell polynomials in the corresponding *** the special cases of the determining functions,we present the explicit forms,determinants,recurrences,difference equations satisfied by the degenerate Gould-Hopper Carlitz Bernoulli polynomials,degenerate Gould-Hopper Carlitz Euler polynomials,degenerate Gould-Hopper Genocchi polynomials,△_(h)-Gould-Hopper Boole polynomials and △_(h)-Gould-Hopper Bernoulli polynomials of the second *** particular cases of the degenerate Gould-Hopper Carlitz Bernoulli polynomials,degenerate Gould-Hopper Genocchi polynomials,△_(h)-Gould-Hopper Boole polynomials and △_(h)-Gould-Hopper Bernoulli polynomials of the second kind,corresponding determinants,recurrences,shift operators and difference equations reduce to all subclass of degenerate so-called families except for Genocchi polynomials recurrence,shift operators,an

关键词： △_(h)-Appell polynomials determinant recurrence difference equation

Mechanistic Transformations Involving Radical and Cationic Polymerizations

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Chinese Journal of Polymer Science 2020年第3期38卷 205-212,I0004页

作者： Gorkem yilmaz Yusuf Yagci Istanbul Technical University Department of ChemistryMaslak34469 IstanbulTurkey Center of Excellence for Advanced Materials Research(CEAMR)and Department of Chemistry Faculty of ScienceKing Abdulaziz University21589 JeddahSaudi Arabia

Mechanistic transformation approach has been widely applied in polymer synthesis due to its unique feature combining structurally different polymers prepared by different polymerization *** methods for the formation of block and graft copolymers through mechanistic transformation involve almost all polymerizations ***,certain polymerization processes require extensive purification processes,which can be time-consuming and *** developments on controlled/living polymerizations involving radical and cationic mechanisms with the ability to control molecular weight and functionality led to new pathways for mechanistic *** this mini-review,we systematically discussed relevant advances in the field through three main titles namely(i)from radical to cationic mechanism,(ii)from cationic to radical mechanism,and(iii)application of specific catalyst systems for both radical and cationic polymerizations.

关键词： Transformation Radical polymerization Cationic polymerization Controlled/living polymerization Photopolymerization