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A new prozostrodontian cynodont (Therapsida) from the Late Triassic Riograndia Assemblage Zone (Santa Maria Supersequence) of Southern Brazil Anais da ABC (AABC)
SOARES,MARINA B.; MARTINELLI,AGUSTÍN G.; OLIVEIRA,TÉO V. DE.
We report here on a new prozostrodontian cynodont, Botucaraitherium belarminoigen. et sp. nov., from the Late Triassic RiograndiaAssemblage Zone (AZ) of the Candelária Sequence (Santa Maria Supersequence), collected in the Botucaraí Hill Site, Candelária Municipality, state of Rio Grande do Sul, Brazil. The new taxon is based on a single specimen (holotype MMACR-PV-003-T) which includes the left lower jaw, without postdentary bones, bearing the root of the last incisor, canine and four postcanines plus one partial crown inside the dentary, not erupted, and two maxillary fragments, one with a broken canine and another with one postcanine. The features of the lower jaw and lower/upper postcanines resemble those of the prozostrodontians Prozostrodon...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cynodontia; Prozostrodontia; Santa Maria Supersequence; Triassic.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000401673
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A new qualitative proof of a result on the real jacobian conjecture Anais da ABC (AABC)
BRAUN,FRANCISCO; LLIBRE,JAUME.
Let F= (f, g) : R2 → R2be a polynomial map such that det DF(x) is different from zero for all x∈ R2. We assume that the degrees of fand gare equal. We denote by the homogeneous part of higher degree of f and g, respectively. In this note we provide a proof relied on qualitative theory of differential equations of the following result: If do not have real linear factors in common, then F is injective.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Real Jacobian conjecture; Global injectivity; Center; Poincaré compactification.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000401519
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A new saurolophine hadrosaurid (Dinosauria: Ornithopoda) from the Upper Cretaceous of Shandong, China Anais da ABC (AABC)
ZHANG,JIALIANG; WANG,XIAOLIN; WANG,QIANG; JIANG,SHUNXING; CHENG,XIN; LI,NING; QIU,RUI.
ABSTRACT A new saurolophine hadrosaurid, Laiyangosaurus youngi gen. et sp. nov. is described and phylogenetically analyzed based on several cranial elements from the Jingangkou Formation, Wangshi Group, Upper Cretaceous of Laiyang, Shandong, China. Laiyangosaurus youngi differs from other members of the saurolophine clade on the basis of a number of autapomorphies, including a prominent and narrow ridge on the lateral side of the nasal which forms the posterodorsal and posterior margin of the circumnasal depression, a primary ridge that runs along most of the maxillary tooth row that is slightly deflected posteriorly, a retroarticular process of the surangular that is dorsolateroposteriorlly recurved, and orbital margins that are wider than the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Upper Cretaceous; Wangshi Group; Laiyangosaurus youngi; Saurolophinae; Shandong; China.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000400503
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A new small deinonychosaur (Dinosauria: Theropoda) from the Late Cretaceous of Patagônia, Argentina Anais da ABC (AABC)
Porfiri,Juan D.; Calvo,Jorge O.; Santos,Domenica dos.
Here we report on a new small deinonychosaurian theropod, Pamparaptor micros gen. et sp. nov., from the Late Cretaceous of Patagônia, Argentina. Pamparaptor micros exhibits a pedal structure previously unknown among South Américan deinonychosaurians. The new material provides new evidence about the morphology and taxonomic diversity of Patagônian deinonychosaurs. Pamparaptor is the smaller non-avialae Patagônian deinonychosaur, probably with about 0.50-0.70 meters, long. The pedal construction resembles, that of Troodontid or basal Dromaeosaurids. Nevertheless, up to now, we considered Pamparaptor a peculiar Patagônian Dromaeosaurid with troodontid-like pes.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Argentina; Barreales Lake; Dromaeosauridae; Late Cretaceous; Patagônia; Unenlagiinae.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000100007
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A new species and new records of Leptogium (Ach.) Gray (Collemataceae, Peltigerales) from Rio Grande do Sul State with an identification key for the genus Anais da ABC (AABC)
KITAURA,MARCOS J.; KOCH,NATÁLIA M.; LUCHETA,FABIANE; KÄFFER,MÁRCIA I.; SCHMITT,JAIRO L.; PEDROSO,JULIANA; MARTINS,SUZANA A.; RODRIGUES,ANDRESSA S.; CANÊZ,LUCIANA S..
Abstract Abstract: Specimens of Leptogium collected in ten localities from the State of Rio Grande do Sul were studied. Sixteen species were found of 28 records mentioned to the state, which represents around 57% of the Leptogium diversity known for Rio Grande do Sul. Leptogium exaratum is proposed as a new species. Leptogium atlanticum, L. milligranum and L. vesiculosum are reported for the first time to the state. The lectotype of L. javanicum is reported here and detailed descriptions are provided to the examined specimens. An identification key is showed with all the 28 mentioned species of Leptogium. It is the first published taxonomic key for Leptogium from Rio Grande do Sul, the State with the highest diversity of this genus in Brazil.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Checklist; Diversity; HAS herbarium; HURG herbarium; Inflated apothecia.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100607
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A new species of Elasmopus (Amphipoda: Hadzioidea: Maeridae) from Suape Harbor, Northeastern Brazilian coast Anais da ABC (AABC)
Senna,André R..
A new amphipod species of the genus Elasmopus Costa, 1853 is described based on material collected from intertidal rocky shore, near the Suape Harbor, coast of the Brazilian state of Pernambuco. The new species may be recognized by the propodus of gnathopod 2 suboval, slightly tapering distally, palmar margin not defined by a stout seta, spine, or palmar corner, with a subdistal blunt tubercle, posterior margin covered by a dense fringe of plumose setae, and posterior margin of basis of pereopod 7 castelloserrate. This is the ninety-fifth species of the genus Elasmopus described worldwide, the most diverse genus in the family Maeridae Krapp-Schickel, 2008, and the eighth species recorded from Brazilian waters. An identification key to Brazilian species of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brazil; Elasmopus souzafilhoi sp. nov; Gammaridea; Intertidal; Pernambuco; Taxonomy.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000300021
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A new species of Microtetrameres (Nematoda, Tetrameridae) parasitizing Buteogallus urubitinga (Aves, Accipitridae) from northeastern Argentina Anais da ABC (AABC)
DÍAZ,MARIANO Dueñas; DRAGO,FABIANA B.; NÚÑEZ,VERÓNICA.
Abstract A new tetramerid nematode, Microtetrameres urubitinga n. sp., is described from specimens recovered from the proventriculus of the great black-hawk, Buteogallus urubitinga (Aves: Accipitridae), from Formosa Province, Argentina. The males of the new species are characterized by having spicules unequal (length ratio of spicules 1:3.8–5.9) and dissimilar in shape (right spicule with a simple tip, left spicule with a symmetrical bifurcated tip), caudal papillae arranged asymmetrically (two pairs precloacal and two pairs postcloacal) and cloacal lips highly protruded forming a tube. The gravid females are permanently coiled clockwise or counterclockwise in a spiral and having a tail tapering gradually to a sharp point, with a cuticular fold. This is...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Accipitridae; Argentina; Buteogallus urubitinga; Microtetrameres urubitinga n. sp.; Tetrameridae.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000602967
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A new species of Sarax Simon, 1892 from the Philippines (Arachnida: Amblypygi: Charinidae) Anais da ABC (AABC)
Giupponi,Alessandro P.L.; Miranda,Gustavo S..
A new species of the genus Sarax Simon, 1892 is described from Panay Island, Philippines. Sarax curioi sp. n. is the second species of the genus from the country and can be distinguished from the other Philippine species (Sarax brachydactylus Simon, 1892) by the sclerotized granules of the pedipalp surface, the spines of the pedipalp distitibia, the number of denticles of the chelicerae claw and the shape of the denticles of the chelicerae basal segment. Sarax newbritainensis Rahmadi and Kojima, 2010 is newly recorded from New Ireland Island, Papua New Guinea.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biodiversity; Southeast Asia; Taxonomy; Whip spider.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000100017
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A new species of Stethelmis Hinton (Coleoptera: Elmidae) from Argentina and description of its larva Anais da ABC (AABC)
MARTÍNEZ-ROMÁN,NICOLÁS RAFAEL; MANZO,VERÓNICA; ARCHANGELSKY,MIGUEL.
Abstract: A new species of Stethelmis, S. shepardi sp. nov., is described for Patagonia, Argentina from adults of both sexes. A full description and illustrations of both the adult and the larva of the new species are provided with comments on its habitat and distribution. Adults of the new species are compared with those of S. kaszabi (Hinton 1970) and S. chilensis (Hinton 1945). The larva of S. shepardi is compared with that of S. kaszabi, the other Stethelmis larva described. We also describe and illustrate for the first time the male genitalia of S. kaszabi. A key to the known species of Stethelmis is also included.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Elminae; Neotropical; Patagonia; Riffle beetles; Stethelmis shepardi.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000700606
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A new species of Tereancistrum (Monogenea, Dactylogyridae) from the gills of three Leporinus species (Characiformes, Anostomidae) and a revised description of Tereancistrum parvus Anais da ABC (AABC)
ZAGO,ALINE C.; YAMADA,FÁBIO H.; FRANCESCHINI,LIDIANE; BONGIOVANI,MARCELA F.; YAMADA,PRISCILLA O.F.; SILVA,REINALDO J. DA.
ABSTRACT The present study describes Tereancistrum flabellum n. sp. (Dactylogyridae, Ancyrocephalinae) from the gills of the anostomid fishes Leporinus friderici, Leporinus amblyrhynchus and Leporinus elongatus from two freshwater ecosystems in the south east of Brazil. This new species is mainly characterized by the morphology of the copulatory complex (such as the MCO base formed by two fan-shaped structures, and accessory piece flattened, curved, rigid and channeled), a dorsal anchor with a well-developed superficial and inconspicuous deep root, and the shape of the accessory anchor sclerite with small spathulate termination. Tereancistrum flabellum n. sp. is the first record of a dactylogyrid from L. amblyrhynchus. The description of Tereancistrum...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ancyrocephalinae; Anostomid fish; Gill ectoparasites; Monogeneans; Neotropical region.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000301121
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A new squamate lizard from the Upper Cretaceous Adamantina Formation (Bauru Group), São Paulo State, Brazil Anais da ABC (AABC)
Nava,William R.; Martinelli,Agustín G..
The record of non-mosasaur squamates (Reptilia, Squamata) is sparse in the Cretaceus fossil record of Brazil and include six putative reports, three from the Aptian-Albian of the Araripe Basin (Tijubina pontei Bonfim-Júnior and Marques, Olindalacerta brasiliensis Evans and Yabumoto, and a lizard indet.) and three from the Upper Cretaceous of the Bauru Group (Pristiguana brasiliensis Estes and Price, Anilioidae gen. et sp. indet., and Squamata gen. et sp. indet.). In this contribution, a new genus and species of lizard, Brasiliguana prudentis gen. et sp. nov., is described based on an isolated left maxilla with teeth. The material was discovered in an outcrop of the Upper Cretaceous Adamantina Formation (Bauru Group) located in the proximity of Presidente...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bauru Group; Brazil; Iguania; Late Cretaceous; Squamata.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000100017
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A new titanosaur sauropod from the Atacama Desert, Chile Anais da ABC (AABC)
Kellner,Alexander W.A.; Rubilar-Rogers,David; Vargas,Alexander; Suárez,Mario.
Partial remains of a titanosaur sauropod collected in the Tolar Formation (Upper Cretaceous) at the Atacama Desert (Antofagasta Region), northern Chile, is described, and a new species, Atacamatitan chilensis gen. et sp. nov., is erected. The material consists mainly of dorsal and caudal vertebrae, part of a humerus and a femur. The presence of a titanosaur confirms the Cretaceous age for the outcrops of red sandstone of the Tolar Formation whose age was previously uncertain, ranging from the Upper Cretaceous to the Paleocene. The new specimen represents the most complete dinosaur reported for this region and one of the most complete titanosaur known from Chile and the pacific margin of South America so far.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dinosauria; Titanosauria; Atacamatitan; Atacama Desert; Cretaceous.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000100011
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A new toothless pterosaur (Pterodactyloidea) from Southern Brazil with insights into the paleoecology of a Cretaceous desert Anais da ABC (AABC)
KELLNER,ALEXANDER W.A.; WEINSCHÜTZ,LUIZ C.; HOLGADO,BORJA; BANTIM,RENAN A.M.; SAYÃO,JULIANA M..
Abstract Abstract: The first pterosaur bone bed from Brazil was reported in 2014 at the outskirts of the town Cruzeiro do Oeste, Paraná State, in the Southern region of the country. Here named 'cemitério dos pterossauros' site, these outcrops were referred to the Goio-Erê Formation (Turonian-Campanian) of the Caiuá Group (Bauru Basin) and revealed the presence of hundreds of isolated or partially articulated elements of the tapejarine pterosaur Caiuajara and fewer amounts of a theropod dinosaur. Here we present a new tapejaromorph flying reptile from this site, Keresdrakon vilsoni gen. et sp. nov., which shows a unique blunt ridge on the dorsal surface of the posterior end of the dentary. Morphological and osteohistological features indicate that all...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Paleoecology; Pterosauria; Pterodactyloidea; Keresdrakon vilsoni; Paraná; Cretaceous.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000400517
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A new world natural vegetation map for global change studies Anais da ABC (AABC)
Lapola,David M.; Oyama,Marcos D.; Nobre,Carlos A.; Sampaio,Gilvan.
We developed a new world natural vegetation map at 1 degree horizontal resolution for use in global climate models. We used the Dorman and Sellers vegetation classification with inclusion of a new biome: tropical seasonal forest, which refers to both deciduous and semi-deciduous tropical forests. SSiB biogeophysical parameters values for this new biome type are presented. Under this new vegetation classification we obtained a consensus map between two global natural vegetation maps widely used in climate studies. We found that these two maps assign different biomes in ca. 1/3 of the continental grid points. To obtain a new global natural vegetation map, non-consensus areas were filled according to regional consensus based on more than 100 regional maps...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Natural vegetation; Tropical forest; Biome; Phytogeography; Biogeophysical parameters; Vegetation map.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000200017
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A new Xenacanthiformes shark (Chondrichthyes, Elasmobranchii) from the Late Paleozoic Rio do Rasto Formation (Paraná Basin), Southern Brazil Anais da ABC (AABC)
PAULIV,VICTOR E.; DIAS,ELISEU V.; SEDOR,FERNANDO A.; RIBEIRO,ANA MARIA.
The Brazilian records on Xenacanthiformes include teeth and cephalic spines from the Parnaíba, Amazonas and Paraná basins. This work describes a new species of Xenacanthidae, collected in an outcrop of Serrinha Member of Rio do Rasto Formation (Wordian to Wuchiapingian), Paraná Basin, municipality of Jacarezinho, State of Paraná. The teeth of the new species are two or three-cuspidated and the aboral surface show a smooth concavity and one rounded basal tubercle. The coronal surface presents one semi-spherical and subcircular coronal button, and also two lateral main cusps and one central (when present) with less than one fifth of the size of the lateral cusps in the labial portion. The lateral cusps are asymmetric or symmetric, rounded in transversal...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Permian; Xenacanthimorpha; Xenacanthidae; Xenacanthus; Shark teeth.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000100135
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A note on tensor fields in Hilbert spaces Anais da ABC (AABC)
BILIOTTI,LEONARDO; MERCURI,FRANCESCO; TAUSK,DANIEL V..
We discuss and extend to infinite dimensional Hilbert spaces a well-known tensoriality criterion for linear endomorphisms of the space of smooth vector fields in <IMG SRC="http:/img/fbpe/aabc/v74n2/m1img2.gif">n.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tensor fields; Hilbert spaces.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652002000200003
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A note on the connectedness locus of the families of polynomials Pc(z)=z n - cz n-j Anais da ABC (AABC)
Arteaga,Carlos; Alves,Alexandre.
Let j be a positive integer. For each integer n &gt; j we consider the connectedness locus Mn of the family of polynomials Pc(z) = z n - cz n-j, where c is a complex parameter. We prove that lim n→&#8734; Mn = D in the Hausdorff topology, where D is the unitary closed disk {c;|c|<1}.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Julia set; Connectedness locus; Hyperbolic components; Principal components.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000100002
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A note on the occurrence of praniza larvae of Gnathiidae (Crustacea, Isopoda) on fishes from Northeast of Pará, Brazil Anais da ABC (AABC)
Diniz,Daniel G.; Varella,Jamille E.A.; Guimarães,Maria Danielle F.; Santos,Arthur F.L.; Fujimoto,Rodrigo Y.; Monfort,Karla C.F.; Pires,Marcus A.B.; Martins,Maurício L.; Eiras,Jorge C..
The infection of the estuarine teleost fishes Mugil gaimardianus Desmarest, 1831 (Mugilidae), Arius phrygiatus Valenciennes, 1839 (Ariidae), Conodon nobilis Linnaeus, 1759 (Haemulidae), Cetengraulis edentulus Cuvier, 1829 (Engraulidae), and Anableps anableps Linnaeus, 1758 (Anablepidae) by praniza larvae of Gnathiidae (Crustacea, Isopoda) was studied in specimens fished off the Atlantic Ocean in Northeast of Pará State, near Bragança, Brazil. The highest infection prevalence value was found in Anableps anableps (42.3%) and the lowest in Conodon nobilis (9.1%). The mean intensity varied from 1 parasitein Conodon nobilis to 19.5 in Arius phrygiatus. A description of the larvae is provided. The morphology of the mouthparts is...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish; Parasites; Isopoda; Gnathiidae; Brazil.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000400007
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A note on the occurrence of the encrusting foraminifera Homotrema rubrum in reef sediments from two distinctive hydrodynamic settings Anais da ABC (AABC)
MACHADO,ALTAIR J.; MORAES,SIMONE S..
Sediment samples from two different reef environments were analyzed for their foraminiferal content: the Sioba/Rio do Fogo reefs, located in a broad shallow shelf dominated by strong currents (Rio Grande do Norte State), and the Praia do Forte reefs, located in a narrow shelf under the influence of wind-induced waves (Bahia State). The recorded foraminiferal fauna, from forty-six samples, is represented by 113 species, being the encrusting species Homotrema rubrum present in nine samples from the Sioba/Rio do Fogo reefs and in 11 samples from Praia do Forte reefs. Homotrema fragments recovered from Sioba/Rio do Fogo are mostly polished with rounded edges (51.59%) and some have a whitish color, whereas the specimens from Praia do Forte reefs are...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Homotrema rubrum; Reefs; Coralline algae; Coral.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652002000400012
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A Novel Porous Diamond - Titanium Biomaterial: Structure, Microstructure, Physico-Mechanical Properties and Biocompatibility Anais da ABC (AABC)
GUIMARÃES,ZULMIRA A.S.; DAMATTA,RENATO A.; GUIMARÃES,RENAN S.; FILGUEIRA,MARCELLO.
ABSTRACT With the aim of introducing permanent prostheses with main properties equivalent to cortical human bone, Ti-diamond composites were processed through powder metallurgy. Grade 1 titanium and mixtures of Ti powder with 2%, 5% and 10 wt% diamond were compacted at 100MPa, and then sintered at 1250°C/2hr/10-6mbar. Sintered samples were studied in the point of view of their microstructures, structures, yield strength and elastic modulus. The results showed that the best addition of diamonds was 2 wt%, which led to a uniform porosity, yield strength of 370MPa and elastic modulus of 13.9 GPa. Samples of Ti and Ti-2% diamond were subjected to in vitro cytotoxicity test, using cultures of VERO cells, and it resulted in a biocompatible and nontoxic composite...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biomaterials; Titanium; Diamond; Sintering; Characterization; Biocompatibility..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000603111
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