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Hydroxyapatite composites with carbon allotropes:Preparation,properties,and applications

Particuology 2024年第5期88卷 239-265页

作者： Boris I.Kharisov Oxana V.Kharissova Lucy T.González Yolanda peña Méndez Igor e.Uflyand Idalia Gómez de la Fuente Universidad Autónoma de Nuevo León Ave.UniversidadCiudad UniversitariaSan Nicolás de los GarzaNuevo León 66455Mexico Tecnologico de Monterrey Escuela de Ingeniería y CienciasMonterreyNuevo Leon 64890Mexico Department of Chemistry Southern Federal UniversityRostov-on-DonRussia

Hydroxyapatite(HA)and its composites with inorganic additives,dopants,and polymers is a rapidly developing branch in the materials *** particular,carbon allotropes are widely used in these composites being widely applied for medical *** a gap of insufficient generalization of recent achievements in the field of the HA/Carbon composites,in this review we present the state of the art of the field of HA composites and hybrids with classic carbon allotropes and *** composites are known for carbon nanotubes,nanofibers,graphene and its oxidized forms,as well as,in a lesser grade,for graphite,fullerenes,nanodiamonds,carbon nanofoams,*** composites can be fabricated by a variety of classic and less-common methods,such as co-precipitation(with or without ultrasonic treatment),CVD,hot isostatic pressing,hydrothermal,spark plasma sintering,biomimetic mineralization,thermal and plasma spray,electrochemical and electrophoretic deposition,self-assembling,3D printing,electrospinning,and lyophilisation,among *** of various synthesis techniques can be also carried out for composite *** or synthetic HA can be used as it is for further interaction with carbon allotropes or it can be first prepared and then reacted with carbon counterpart;similarly,carbon allotropes can be introduced into the interaction with HA directly or they can be first synthesized,in particular from *** biocompatible composites can be produced in the form of coatings,powders,and scaffolds and can additionally contain quantitative amounts of third phases,frequently natural or synthetic *** these composites,especially with O-containing functionalizing groups,HA disadvantages could be considerably decreased with simultaneous enhancement of mechanical properties,becoming similar to human bone,chemical stability and biocompatibility,as well as possessing antibacterial ***→G reduction and higher HA decoration were obs

关键词： Hydroxyapatite Carbon nanotubes Graphene Quantum dots Fullerenes Nanodiamonds

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evolution, divergence, and convergence in the mandibles of opossums (Didelphidae, Didelphimorphia)

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Current Zoology 2024年第4期70卷 488-504页

作者： Franciscodas Chagas Silva-Neto Silvia e.Pavan Diego Astua Laboratorio de Mastozoologia Departamento de ZoologiaUniversidade Federal de Pernambuco.Av.Prof.Moraes Regos.n.Cidade Universitaria.50670-901RecifePEBrazil Department of Biological Sciences California State Polytechnic UniversityHumboldt1Harpst StreetArcataCA95521USA

Didelphid marsupials are considered a morphologically unspecialized group with a generalist diet that includes vertebrates,invertebrates,and plant *** cranium and scapula variation has alreadybeen examined within Didelphidae,variation inmandible shape,usually associated with diet or phylogeny in other mammalian groups,has not yet been properly assessed in the *** evaluated the variation in mandible shape and size of didelphids(2470 specimens belonging to 94 species)using 2D geometric *** classified the diet of the didel-phids into four broad categories to assess whether morphospace ordination relates to dietary *** also provided the most comprehensive phylogeny for the family(i23 out of the 126 living species)using 10 nuclear and mitochondrial *** then mapped mandible size and shape onto that phylogeny for 93 selected taxa and ancestral size and shapes were reconstructed by *** found phylogenetically structured variation in mandible morphology between didelphid groups,and our results indicate that they have a significant phylogenetic *** main axis of shape variation is poorly related to size,but the second is strongly allometric,indicating that allometry is not the main factor in shaping morphological diversity on their *** results indicate that the shape and size of the ancestral mandible of didelphids would be similar to that of the current species of the genus Marmosa.

关键词： mandible Didelphimorphia morphological evolution allometry phylogeny diet.

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Linking leaf elemental traits to biomass across forest biomes in the Himalayas

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Science China earth Sciences 2024年第5期67卷 1518-1528页

作者： Nita DYOLA eryuan LIANG Josep peÑUeLAS J.Julio CAMAReRO Shalik Ram SIGDeL Sugam ARYAL Wentao LIN Xiang LIU Yongwen LIU Xingliang XU Sergio ROSSI State Key Laboratory of Tibetan Plateau earth System Environment and Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Laboratoire sur lesécosystèmes terrestres boréaux Département des Sciences FondamentalesUniversitédu QuébecàChicoutimi555Boulevard de l′UniversitéChicoutimi(QC)G7H2B1Canada CSIC Global Ecology Unit CREAF-CSIC-UABBellaterraE-08193 CataloniaSpain CReAF Cerdanyola del VallèsE-08193 CataloniaSpain Instituto Pirenaico de ecología(Ipe-CSIC) Avenida Montañana 1005Zaragoza 50059Spain Friedrich-Alexander-Universität erlangen-Nürnberg Institut für GeographieErlangen 91058Germany State Key Laboratory of Grassland Agro-ecosystems College of EcologyLanzhou UniversityLanzhou 730000China Key Laboratory of ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China

Plants require a number of essential elements in different proportions for ensuring their growth and *** elemental concentrations in leaves reflect the functions and adaptations of plants under specific environmental ***,less is known about how the spectrum of leaf elements associated with resource acquisition,photosynthesis and growth regulates forest biomass along broad elevational *** examined the influence of leaf element distribution and diversity on forest biomass by analyzing ten elements(C,N,P,K,Ca,Mg,Zn,Fe,Cu,and Mn)in tree communities situated every 100 meters along an extensive elevation gradient,ranging from the tropical forest(80 meters above sea level)to the alpine treeline(4200 meters above sea level)in the Kangchenjunga Landscape in eastern Nepal *** calculated communityweighted averages(reflecting dominant traits governing biomass,i.e.,mass-ratio effect)and functional divergence(reflecting increased trait variety,i.e.,complementarity effect)for leaf elements in a total of 1,859 trees representing 116 *** increasing mass-ratio effect and decreasing complementarity in leaf elements enhance forest biomass accumulation.A combination of elements together with elevation explains biomass(52.2%of the variance)better than individual elemental trait diversity(0.05%to 21%of the variance).elevation modulates trait diversity among plant species in biomass *** promotes biomass at lower elevations,but reduces biomass at higher elevations,demonstrating an interaction between elevation and *** interaction between elevation and mass-ratio effect produces heterogeneous effects on biomass along the elevation *** research indicates that biomass accumulation can be disproportionately affected by elevation due to interactions among trait diversities across vegetation *** higher trait variation enhances the adaptation of species to environmental changes,it reduces

关键词： ecosystem function elevational gradient Functional diversity Functional traits Leaf elements Niche complementarity

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effect of calcination temperature on structural properties and catalytic activity in oxidation reactions of LaNiO_3 perovskite prepared by pechini method

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Journal of Rare earths 2012年第3期30卷 210-216页

作者： K. Rida M.A. pea e. Sastre A. Martínez-Arias Laboratory for the Study of Interactions Between Materials and Their environment University of Jijel Institute of Catalysis and petroleum-Chemistry CSIC C/Marie Curie 2 Campus de Cantoblanco 28049 Madrid Spain

The study presented the preparation of the perovskite oxide LaNiO3 by the complex citrate method, paying particular attention to evolution of its formation from the amorphous precursor with varied calcination temperatures. The products obtained after heat treatment under air between 200 and 800 ℃ were characterized by X-ray diffraction （XRD）, thermogravimetric and differential thermal analysis （TG-DTA）, Fourier transform infrared spectroscopy （FTIR）, SBeT measurements and X-ray photoelectron spectroscopy （XPS）. The results showed the formation of a single phase with perovskite structure from ca. 550 ℃. Tests on the two catalytic oxidation reactions of C3H6 and CO over the system calcined between mentioned temperatures were examined on the basis of characterization results and showed that optimum catalytic properties for such reactions were achieved for the perovskite calcined at 600 ℃. In turn, correlations between redox and catalytic properties were established on the basis of thermogravimetric temperature programmed reduction （TPR） analysis.

关键词： LaNiO3 perovskite pechini SOFC C3H6 and CO combustion rare earths

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喜马拉雅山不同森林群落主要树种叶片元素性状与生物量之间的关系

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中国科学：地球科学 2024年第5期54卷 1544-1555页

作者： Nita DYOLA 梁尔源 Josep peÑUeLAS JJulio CAMAReRO Shalik Ram SIGDeL Sugam ARYAL 林文涛刘向刘永稳徐兴良 Sergio ROSSI 中国科学院青藏高原研究所青藏高原地球系统与资源环境全国重点实验室北京100101 中国科学院大学北京100049 Laboratoire sur lesécosystèmes terrestres boréaux Département des Sciences FondamentalesUniversitédu QuébecàChicoutimi555Boulevard de l′UniversitéChicoutimi(QC)G7H2B1Canada CSIC Global Ecology Unit CREAF-CSIC-UABBellaterraE-08193 CataloniaSpain CReAF Cerdanyola del VallèsE-08193 CataloniaSpain Instituto Pirenaico de ecología(Ipe-CSIC) Avenida Montañana 1005Zaragoza 50059Spain Friedrich-Alexander-Universität erlangen-Nürnberg Institut für GeographieErlangen 91058Germany 兰州大学生态学院草种创新与草地农业生态系统全国重点实验室兰州730000 中国科学院地理科学与资源研究所生态系统网络观测与模拟重点实验室北京100101

植物需要多种基本元素调节并保持其特定比例以维持生长发育,叶片元素含量反映了植物的功能及其对环境的适应性.然而,在森林海拔梯度上,我们对于资源获取、光合作用和生长相关的叶片元素如何调节森林生物量仍知之甚少.本研究在喜马拉雅... 详细信息

植物需要多种基本元素调节并保持其特定比例以维持生长发育,叶片元素含量反映了植物的功能及其对环境的适应性.然而,在森林海拔梯度上,我们对于资源获取、光合作用和生长相关的叶片元素如何调节森林生物量仍知之甚少.本研究在喜马拉雅山干城章嘉峰地区沿热带森林(海拔80m)至高山树线(海拔4200m)设置海拔梯度样带,每间隔海拔100m设置一个样点,对116个树种的1859个个体测定了叶片中10种元素(C、N、P、K、Ca、Mg、Zn、Fe、Cu和Mn)的含量,通过计算叶片元素含量的群落加权平均值(反映优势物种的性状优势度,表征质量比效应)和功能离散度(反映物种在生态位空间内的聚集或者离散程度,表征互补效应),探究叶片元素含量及其离散程度沿海拔梯度分异特征,解析其对森林群落生物量的影响.研究结果表明,较强的叶片元素质量比效应和较弱的互补效应有利于森林群落生物量的积累.叶片元素性状多样性与海拔的共同作用对生物量的解释量(解释方差:52.2%)高于元素性状多样性的解释量(解释方差:0.05%~21%).海拔调节了树种性状多样性在生物量积累中的作用,互补效应在低海拔和高海拔地区对生物量的影响分别体现为积极和消极作用,这表明海拔和互补效应之间也存在交互作用.此外,海拔和质量比效应的交互作用对海拔梯度上生物量的影响也存在异质性.本研究表明,不同森林群落生物量的积累可能受到由海拔调控的性状多样性的影响.尽管较高的性状分异不利于生物量的积累,但能增强高海拔地区树种对胁迫环境的适应性.

关键词：生态系统功能海拔梯度功能多样性功能性状叶片元素生态位互补

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New injectable two-step forming hydrogel for delivery of bioactive substances in tissue regeneration

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Regenerative Biomaterials 2019年第3期6卷 149-162页

作者： edgar pe´rez-Herrero Patricia Garcı´a-Garcı´a Jaime Go´mez-Morales Matias Llabre´s Araceli Delgado Carmen e´vora Department of Chemical engineering and Pharmaceutical Technology University of La LagunaLa Laguna 38200TenerifeSpain Institute of Biomedical Technologies(ITB) Center for Biomedical Research of the Canary Islands(CIBICAN)University of La LagunaLa Laguna 38071TenerifeSpain Laboratory of Crystallographic Studies Andalusian Earth Sciences InstituteSpanish Research Council—University of GranadaArmillaGranada 18100Spain Institute of Tropical Diseases and Healthcare of the Canary Islands University of La LagunaLa Laguna 38203TenerifeSpain

A hydrogel based on chitosan,collagen,hydroxypropyl-c-cyclodextrin and polyethylene glycol was developed and *** incorporation of nano-hydroxyapatite and pre-encapsulated hydrophobic/hydrophilic model drugs diminished the porosity of hydrogel from 81.6262.25%to 69.9863.07%.Interactions between components of hydrogel,demonstrated by FTIR spectroscopy and rheology,generated a network that was able to trap bioactive components and delay the burst *** thixotropic behavior of hydrogel provided adaptability to facilitate its implantation in a minimally invasive *** profiles from microspheres included or not in hydrogel revealed a two-phase behavior with a burst-and a controlled-release *** same release rate for microspheres included or not in the hydrogel in the controlled-release period demonstrated that mass transfer process was controlled by internal *** diffusion coefficients,Deff,that describe internal diffusion inside microspheres,and mass transfer coefficients,h,*** contribution of hydrogel to mass transfer,were determined using‘genetic algorithms’,obtaining values between 2.64·10^(-15) and 6.67·10^(-15)m^(2)/s for Deff and 8.50·10^(-10) to 3.04·10^(-9) m/s for *** proposed model fits experimental data,obtaining an R2-value ranged between 95.41 and 98.87%.In vitro culture of mesenchymal stem cells in hydrogel showed no manifestations of intolerance or toxicity,observing an intense proliferation of the cells after 7 days,being most of the scaffold surface occupied by living cells.

关键词： hydrogel collagen–cyclodextrin–chitosan rheology mass transfer estradiol FITC-dextran

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Combined carriership of TLR9 -1237C and CD14 -260T alleles enhances the risk of developing chronic relapsing pouchitis

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World Journal of Gastroenterology 2005年第46期11卷 7323-7329页

作者： KM Lammers S Ouburg SA Morré JBA Crusius P Gionchetti F Rizzello C Morselli e Caramelli R Conte G Poggioli M Campieri AS pea Department of Internal Medicine and GastroenterologyPoliclinico S.Orsola University of BolognaBolognaItaly Laboratory of ImmunogeneticsVU University Medical Center AmsterdamThe Netherlands Institute of Histology and General embryologyUniversity of Bologna BolognaItaly Department of Immunohaematology and Blood TransfusionPoliclinico S.Orsola University of BolognaBolognaItaly Department of Surgery and Organ TransplantationPoliclinic S.Orsola University of BolognaBolognaItaly Laboratory of ImmunogeneticsVU University Medical Center AmsterdamThe Netherlands Laboratory of Immunogenetics and Department of GastroenterologyVU University Medical CenterAmsterdamThe Netherlands

AIM： To investigate the single nucleotide polymorphisms （SNPs） in genes involved in bacterial recognition and the susceptibility to pouchitis or pouchitis severity. MeTHODS： Analyses of CD14 -260C〉T, CARD15/ NOD2 3020insC, Toll-like receptor （TLR）4 ＋896A〉G, TLR9 -1237T〉C, TLR9＋2848G〉A, and IRAKM ＋ 22148G〉A SNPs were performed in 157 ileal-pouch anal anastomosis （IPAA） patients （79 patients who did not develop pouchitis, 43 infrequent pouchitis patients, 35 chronic relapsing pouchitis patients） and 224 Italian Caucasian healthy controls. ReSULTS： No significant differences were found in SNP frequencies between controls and IPAA patients. However, a significant difference in carriership frequency of the TLRg-1237C allele was found between the infrequent pouchitis and chronic relapsing pouchitis groups [P = 0.028, odd＇s ratio （OR） = 3.2, 95%CI = 1.2-8.6]. This allele uniquely represented a 4-locus TLR9 haplotype comprising both studied TLR9 SNPs in Caucasians. Carrier trait analysis revealed an enhanced combined carriership of the alleles TLR9 -1237C and CD14 -260T in the chronic relapsing pouchitis and infrequent pouchitis group （P = 0.018, OR = 4.1, 95%CI = 1.4 -12.3）. There is no evidence that the SNPs predispose to the need for IPAA surgery. The significant increase of the combined carriershoip of the CD14-260T and TLR9-1237C alleles in the chronic relapsing pouchitis group suggests that these markers identift a subgroup of IPAA patients with a rish of developing chronic or refractory pouchitis.

关键词： Pouchitis Innate immunity Single nucleotide polymorphisms CD14 TLR9

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Novel electrode structure in a DBD reactor applied to the degradation of phenol in aqueous solution

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Plasma Science and Technology 2017年第7期19卷 71-84页

作者： Antonio MeRCADO-CABReRA Rosendo pe?A-eGUILUZ Régulo LópeZ-CALLeJAS Bethsabet JARAMILLO-SIeRRA Raúl VALeNCIA-ALVARADO Benjamín RODRíGUeZ-MéNDeZ Arturo e MU?OZ-CASTRO Instituto Nacional de Investigaciones Nucleares Plasma Physics Laboratory Tecnológico de estudios Superiores de Tianguistenco

Phenol degradation experimental results are presented in a similar wastewater aqueous solution using a non-thermal plasma reactor in a coaxial dielectric barrier discharge. The novelty of the work is that one of the electrodes of the reactor has the shape of a hollow screw which shows an enhanced efficiency compared with a traditional smooth structure. The experimentation was carried out with gas mixtures of 90% Ar-10% O2, 80% At-20% 02 and 0% Ar-100% 02. After one hour of treatment the removal efficiency was 76%, 92%, and 97%, respectively, assessed with a gas chromatographic mass spectrometry technique. For both reactors used, the ozone concentration was measured. The screw electrode required less energy, for all gas mixtures, than the smooth electrode, to maintain the same ozone concentration. On the other hand, it was also observed that in both electrodes the electrical conductivity of the solution changed slightly from ,-0.0115 S m^-1 up to -0.0430 S m^-1 after one hour of treatment. The advantages of using the hollow screw electrode structure compared with the smooth electrode were：（1） lower typical power consumption, （2） the generation of a uniform plasma throughout the reactor benefiting the phenol degradation, （3） a relatively lower temperature of the aqueous solution during the process, and （4） the plasma generation length is larger.

关键词： DBD gas discharges removal organic compounds discharge in liquids

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Correlating the electronic structure of perovskite La_(1-x)SrxCoO_(3) with activity for the oxygen evolution reaction:The critical role of Co 3d hole state

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Journal of energy Chemistry 2022年第2期31卷 637-645页

作者： Zechao Shen Mei Qu Jueli Shi Freddy e.Oropeza Victor A.de la peña O’Shea Giulio Gorni C.M.Tian Jan P.Hofmann Jun Cheng Jun Li Kelvin H.L.Zhang State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina Photoactivated Processes Unit IMDEA Energy InstituteParque Tecnológico de MóstolesAvda.Ramón de la Sagra 328935 MóstolesMadridSpain CeLLS-ALBA Synchrotron Carrer de la Llum 2-2608290 Cerdanyola del VallèsSpain Surface Science Laboratory Department of Materials and Earth SciencesTechnical University of Darmstadt Otto-Berndt-Strasse 364287 DarmstadtGermany

perovskite LaCoO_(3) is being increasingly explored as an effective low-cost electrocatalyst for the oxygen evolution reaction(OeR).Sr doping in LaCoO_(3)(La1-xSrxCoO_(3))has been found to substantially increase its catalytic *** this work,we report a detailed study on the evolution of the electronic structure of La1-xSrxCoO_(3) with 0≤x≤1 and its correlation with electrocatalytic activity for the OeR.A combination of X-ray photoemission spectroscopy(XPS)and X-ray absorption spectroscopy(XAS)was used to unravel the electronic density of states(DOS)near the Fermi level(eF),which provide insights into the key electronic structure features for the enhanced OeR catalytic *** analysis on the Co L-edge XAS suggest that LaCoO_(3) has a low spin state with t_(2g)^(6) e_(g)^(0) configuration at room *** implies that the high OeR catalytic activity of LaCoO_(3) should not be rationalized by the occupancy of eg=1 *** Sr^(2+) for La^(3+) in LaCoO_(3) induces Co4+oxidation states and effectively dopes hole states into the top of valence band.A semiconductor-to-metal transition is observed for x>0.2,due to the holeinduced electronic DOS at the eF and increased hybridization between Co 3 d and O 2 *** an electronic modulation enhances the surface adsorption of the*OH intermediate and reduces the energy barrier for interfacial charge transfer,thus improving the OeR catalytic activity in La_(1-x)Sr_(x)CoO_(3).In addition,we found that the La_(1-x)Sr_(x)CoO_(3) surface undergoes amorphization after certain period of OeR measurement,leading to a partial deactivation of the *** Sr doping levels accelerated the amorphization process.

关键词： perovskite oxide Oxygen evolution Cobalt electronic structure

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Vertically aligned Ni/NiO nanocomposites with abundant oxygen deficient hetero-interfaces for enhanced overall water splitting

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Science China Chemistry 2022年第10期65卷 1885-1894页

作者： Hongxia Wang Meiyan Cui Gaoliang Fu Jiaye Zhang Xingyu Ding Irene Azaceta Matthew Bugnet Demie M.Kepaptsoglou Vlado K.Lazarov Victor Ade la peña O’Shea Freddy e.Oropeza Kelvin H.L.Zhang State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Henan Provincial Key Laboratory of Nanocomposites and Applications Institute of Nanostructured Functional MaterialsHuanghe Science and Technology CollegeZhengzhou 450006China Department of Physics University of YorkHeslingtonYorkYO105DDUK SuperSTeM Laboratory SciTech Daresbury CampusDaresbury WA44ADUK School of Chemical and Process engineering Univeristy of LeedsLeeds LS29JTUK Univ Lyon CNRSINSA LyonUCBLMATEISUMR 551069621 VilleurbanneFrance Photoactivated Processes Unit IMDEA Energy InstituteParque Tecnológico de MóstolesAvda.Ramón de la Sagra 328935 MóstolesMadridSpain

The design of heterostructured transition metal-based electrocatalysts with controlled composition and interfaces is key to increasing the efficiency of the water electrolysis and the elucidation of reaction *** this work,we report the synthesis of well-controlled vertically aligned Ni/NiO nanocomposites consisting of Ni nanoclusters embedded in NiO,which result in highly efficient electrocatalysts for overall water *** show that such a high catalytic efficiency toward both the hydrogen evolution reaction(HeR)and the oxygen evolution reaction(OeR)originates from a synergetic effect at Ni/NiO interfaces that significantly reduces the energy barrier for water dissociation,and favours the formation of reactive H*intermediates on the Ni side of the interface,and OH_(ads) on the NiO side of the interface.A study of water chemisorption based on near-ambient pressure photoelectron spectroscopy indicates that the abundant hetero-interfaces in Ni/NiO nanocomposite promote the dissociation of water with a three-fold increase in the surface concentration of OH_(ads) compared with pure *** functional theory calculations indicate that Ni/NiO interface leads to the reduction of the water dissociation energy barrier due to a high concentration of oxygen vacancies at NiO side of the interface,whereas the formation of highly active metallic Ni sites with an optimal value of Gibbs free energy of H*(ΔG_(H*)=−0.16 eV)owes to a favourable adjustment of the electron energetics at the interface,thus accelerating the overall electrochemical water splitting.

关键词： water splitting hydrogen evolution reaction electronic structure heterostructure vertically aligned nanocomposites

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