Produção Nacional
Revisado por pares
Pedro Weslley Rosário, Augusto Flávio Campos Mineiro Filho, Rafaela Xavier Lacerda, Maria Regina Calsolari,
... Remnant Ablation with Radioactive IodinePedro Weslley Rosario, Augusto Flávio Campos Mineiro Filho, Rafaela Xavier Lacerda, and Maria Regina ... Search for more papers by this author, Augusto Flávio Campos Mineiro FilhoPostgraduate Center, Santa Casa de Belo Horizonte, ... To cite this article:Pedro Weslley Rosario, Augusto Flávio Campos Mineiro Filho, Rafaela Xavier Lacerda, and Maria Regina ...
Tópico(s): Head and Neck Anomalies
2012 - Mary Ann Liebert, Inc. | Thyroid
Produção Nacional
Revisado por pares
Pedro Weslley Rosário, Mariana Souza Furtado, Augusto Flávio Campos Mineiro Filho, Rafela Xavier Lacerda, Maria Regina Calsolari,
In patients with differentiated thyroid carcinoma considered to be free of the disease after initial therapy, the appropriate timing or necessity of subsequent stimulated thyroglobulin (Tg) testing is uncertain. The objective of this study was to determine the value of a repeat stimulated Tg in patients considered to be free of disease 6-12 months after thyroid ablation, and also who continued to have serum Tg <1 ng/mL while on thyrotropin suppressive doses of thyroxine (T4) (Tg/T4), negative anti-Tg ...
Tópico(s): Neuroendocrine Tumor Research Advances
2011 - Mary Ann Liebert, Inc. | Thyroid
Produção Nacional
Revisado por pares
Pedro Weslley Rosário, Augusto Flávio Campos Mineiro Filho, Brenda Sá Senna Prates, Lívia Cristina Oliveira Silva, Rafaela Xavier Lacerda, Maria Regina Calsolari,
Epidemiological studies have shown a higher risk of thyroid cancer among individuals who have a relative with papillary thyroid cancer (PTC) compared to those without a family history. This study evaluated the prevalence of thyroid cancer among subjects with only one first-degree relative (sibling) with PTC who had no palpable nodules, factors predictive of this malignancy, and the characteristics of tumors discovered during ultrasonographic screening.A total of 757 siblings of 447 patients with apparently ...
Tópico(s): Head and Neck Anomalies
2012 - Mary Ann Liebert, Inc. | Thyroid
Produção Nacional
Revisado por pares
Pedro Weslley Rosário, Augusto Flávio Campos Mineiro Filho, Rafela Xavier Lacerda, Davi Alves dos Santos, Maria Regina Calsolari,
In the presence of anti-thyroglobulin antibodies (TgAb), serum thyroglobulin (Tg) might be underestimated. Therefore, the American Thyroid Association does not recommend serum Tg after thyroid hormone withdrawal or recombinant human thyrotropin administration (stimulated Tg) and diagnostic whole-body scanning (DxWBS) in TgAb-positive patients who have serum Tg values while on thyroxine (Tg-on-T4) of <1 ng/mL. The objective of this study was to determine, in patients with differentiated thyroid cancer ( ...
Tópico(s): Head and Neck Anomalies
2012 - Mary Ann Liebert, Inc. | Thyroid
Produção Nacional
Revisado por pares
Pedro Weslley Rosário, Augusto Flávio Campos Mineiro Filho, Brenda Sá Senna Prates, Lívia Cristina Oliveira Silva, Maria Regina Calsolari,
Background: Stimulated thyroglobulin (Tg) ≤1 ng/mL after thyroidectomy (after L-thyroxine [L-T4] withdrawal or administration of recombinant human thyrotropin [rhTSH]) has been proposed as a criterion to spare patients with papillary thyroid cancer (PTC), who are at low risk of recurrence, from ablation with iodine-131 (131I). The objective of this prospective study was to evaluate the recurrence rate using this approach. Methods: This prospective study included 136 patients with PTC who underwent total ...
Tópico(s): Thyroid and Parathyroid Surgery
2012 - Mary Ann Liebert, Inc. | Thyroid
Produção Nacional
Revisado por pares
Pedro Weslley Rosário, Mariana de Souza Furtado, Augusto Flávio Campos Mineiro Filho, Rafaela Xavier Lacerda, Maria Regina Calsolari,
Diagnostic radioiodine whole-body scanning (DxWBS) in combination with stimulated thyroglobulin (Tg) (i.e., measurement after levothyroxine [L-T4] withdrawal or recombinant human TSH administration) continues to be recommended for patients with differentiated thyroid carcinoma (DTC) at high or intermediate risk for recurrence with negative basal Tg and ultrasonography (US) after ablation. However, the value of DxWBS has been questioned, even in these cases. The objective of this prospective study was ...
Tópico(s): Radiation Dose and Imaging
2012 - Mary Ann Liebert, Inc. | Thyroid
Produção Nacional
Revisado por pares
João Paulo Mendes Tribst, Roberto Lo Giudice, Alison Flávio Campos dos Santos, Alexandre Luiz Souto Borges, Laís Regiane Silva-Concílio, Marina Amaral, Giuseppe Lo Giudice,
The purpose of this study is to evaluate the effect of pulp chamber extension angles and filling material mechanical properties on the biomechanical response of a ceramic endocrown. A 3D model of maxillary molar that underwent endodontically treatment was exported to computer aided design software to conduct finite element analysis (FEA). The endocrown model was modified considering different pulp chamber extension angles (right angle; 6°, 12° and 18° of axial divergence). The solids were imported ...
Tópico(s): Dental Implant Techniques and Outcomes
2021 - Multidisciplinary Digital Publishing Institute | Materials
Produção Nacional
Revisado por pares
João Paulo Mendes Tribst, Alison Flávio Campos dos Santos, Giuliane da Cruz Santos, Larissa Sandy da Silva Leite, Julio Chávez Lozada, Laís Regiane Silva-Concílio, Kusai Baroudi, Marina Amaral,
This study tested whether three different cement layer thicknesses (60, 120 and 180 μm) would provide the same bonding capacity between adhesively luted lithium disilicate and human dentin. Ceramic blocks were cut to 20 blocks with a low-speed diamond saw under cooling water and were then cemented to human flat dentin with an adhesive protocol. The assembly was sectioned into 1 mm2 cross-section beams composed of ceramic/cement/dentin. Cement layer thickness was measured, and three groups were formed. ...
Tópico(s): Dental Research and COVID-19
2021 - Multidisciplinary Digital Publishing Institute | Materials
Produção Nacional
Revisado por pares
Pedro Weslley Rosário, Augusto Flávio Campos Mineiro Filho, Rafaela Xavier Lacerda, Maria Regina Calsolari,
<i>Background:</i> The objective of this study was to report the results of a series of 12 patients with papillary carcinoma aged 16 years or younger, who were prepared with recombinant human TSH (rhTSH) for remnant ablation with <sup>131</sup>I. The TSH levels achieved and the safety of 24 cycles of rhTSH administration (ablation and control assessment) are reported. <i>Methods:</i> All patients were prepared using the same protocol as recommended for adults. Eight to ...
Tópico(s): Salivary Gland Tumors Diagnosis and Treatment
2012 - Karger Publishers | Hormone Research in Paediatrics
Michelle Corte-Real, Marcos Flávio de Campos, Y. Zhang, G. C. Hadjipanayis, J.F. Liu,
A comprehensive characterization of sintered magnets with composition Sm(CobalFe0.06CuxZr0.03)z, where 0.088 ≤ x ≤ 0.128 and 5.8 ≤ z ≤ 7.2, was undertaken with the objective of clarifying the coercivity mechanisms. For the range of compositions evaluated in this study Cu has a small effect on microstructure, while z has a more pronounced effect. The abnormal coercivity behavior as function of temperature takes place preferentially in samples with low Cu and low z. The microstructure of the samples is composed ...
Tópico(s): Magnetic properties of thin films
2002 - Wiley | physica status solidi (a)
Produção Nacional
Revisado por pares
Flavio Barboza Campos, Paulo L.C. Lage,
A numerical method was developed to solve the population balance equation for transient multidimensional problems including particle–particle interactions. The population balance equation was written in a mixed Euler–Lagrange formulation which was solved using the discretization method that represents the number density function by impulse functions, an operator splitting method and a remeshing procedure for the internal variable that conserves the mass and the number of particles. This method was ...
Tópico(s): Fluid Dynamics and Mixing
2003 - Elsevier BV | Chemical Engineering Science
Produção Nacional
Diana Farkas, Marcos Flávio de Campos, Roberto Martins de Souza, Hélio Goldenstein,
Tópico(s): nanoparticles nucleation surface interactions
1994 - Pergamon Press | Scripta Metallurgica et Materialia
Produção Nacional
Revisado por pares
The Stacking fault energy (SFE) is an important parameter for metals and alloys. The plastic deformation behavior of face centered cubic (FCC) metals and alloys is directly related to the SFE values. The several methods for determining SFE are critically discussed. The values reported in the 1960s and early 1970s are, in general, 20-30% overestimated. The node dislocation method, due to Whelan, overestimates the SFE. The method based on the critical resolved shear stress is not reliable. The most ...
Tópico(s): Microstructure and Mechanical Properties of Steels
2008 - Trans Tech Publications | Materials science forum
Produção Nacional
Revisado por pares
Fernando José Gomes Landgraf, M. Emura, Marcos Flávio de Campos,
The behavior of the Steinmetz coefficient has been described for several different materials: steels with 3.2% Si and 6.5% Si, MnZn ferrite and Ni–Fe alloys. It is shown that, for steels, the Steinmetz law achieves R2>0.999 only between 0.3 and 1.2 T, which is the interval where domain wall movement dominates. The anisotropy of Steinmetz coefficient for non-oriented (NO) steel is also discussed. It is shown that for a NO 3.2% Si steel with a strong Goss component in texture, the power law coefficient ...
Tópico(s): Magnetic properties of thin films
2008 - Elsevier BV | Journal of Magnetism and Magnetic Materials
Produção Nacional
Revisado por pares
Fernando José Gomes Landgraf, Marcos Flávio de Campos, J. Leicht,
Tópico(s): Magnetic properties of thin films
2008 - Elsevier BV | Journal of Magnetism and Magnetic Materials
Produção Nacional
Revisado por pares
Marcos Flávio de Campos, S.A. Loureiro, Daniel Rodrigues, Maria do Carmo Silva, Nelson Batista de Lima,
The effect of high energy milling on powders of a FeNi (50/50) alloy and a 316L stainless steel has been evaluated by means of X-Ray Diffraction (XRD). The average microstrain as function of the milling time (1/2h, 1h and 8h) was determined from XRD data. The displacement and broadening of the (XRD) peaks were used for estimate the stacking fault energy (SFE), using the method of Reed and Schramm. It was estimated SFE=79 mJ/m2 for the FeNi (50/50) alloy and SFE=14 mJ/m2 for the 316L stainless steel. The ...
Tópico(s): Metal Alloys Wear and Properties
2008 - Trans Tech Publications | Materials science forum
Produção Nacional
Revisado por pares
S.A. Romero, Marcos Flávio de Campos, H. Rechenberg, F.P. Missell,
Several magnets with different Zr contents were studied: Sm(CobalFe0.2Cu0.1Zrx)8 (bal=balance; x=0, 0.02, 0.04, 0.06 and 0.08). The microstructure of the magnets includes three main phases, all crystallographically coherent: the cell phase Sm2(Co,Fe)17, the cell boundary phase Sm(Co,Cu)5 and a lamellar Zr-rich phase, rhombohedral (ZrSm)1Co3. The hysteresis curves were compared with the Callen, Liu and Cullen (CLC) modification of the Stoner–Wohlfarth model for an isotropic distribution of interacting ...
Tópico(s): Magnetic properties of thin films
2008 - Elsevier BV | Journal of Magnetism and Magnetic Materials
Produção Nacional
Revisado por pares
Marcos Flávio de Campos, M. J. Sablik, Fernando José Gomes Landgraf, Thomas Hirsch, R. Machado, Rodrigo Magnabosco, C. J. Gutierrez, Anup Bandyopadhyay,
Cold-rolled (0–19% of reduction) 0.5% Si electrical steel sheets were studied in detail, including macro and micro residual stress measurements, crystallographic texture, dc-hysteresis curves and iron losses. Even for the smallest deformation, losses increase significantly, with large increase of the hysteresis losses, whereas the anomalous losses reduce slightly. The residual microstresses are ∼150–350 MPa, whereas residual macrostresses are compressive, ∼50 MPa. The large increase of the hysteresis ...
Tópico(s): Non-Destructive Testing Techniques
2008 - Elsevier BV | Journal of Magnetism and Magnetic Materials
Produção Nacional
M. J. Sablik, Wilhelmus J. Geerts, Kyle C. Smith, Amanda Gregory, Clayton Moore, Daniel Palmer, Anup Bandyopadhyay, Fernando José Gomes Landgraf, Marcos Flávio de Campos,
To explain the magnetic behavior of plastic deformation of thin magnetic films (Fe and permalloy) on an elastic substrate (nitinol), it is noted that unlike in the bulk, the dislocation density does not increase dramatically because of the dimensional constraint. As a result, the resulting residual stress, even though strain hardening is limited, dominates the observed magnetic behavior. Thus, with the field parallel to the stress axis, the compressive residual stress resulting from plastic deformation ...
Tópico(s): Microstructure and Mechanical Properties of Steels
2010 - IEEE Magnetics Society | IEEE Transactions on Magnetics
Produção Nacional
Revisado por pares
Sintered NdFeB magnets typically exhibit grain size above 2 micrometers, a value above the single domain particle size (~0.3 micrometers). It is discussed how to obtain relationships between grain size and coercivity with energy balance models, considering formation and annihilation of domain walls as a dissipative process. In the case of nanocrystaline magnets, the Stoner-Wohlfarth model is very suitable. For larger grain sizes, the contribution of the magnetostatic energy of each grain has to be ...
Tópico(s): Magnetic properties of thin films
2010 - Trans Tech Publications | Materials science forum
Produção Nacional
Revisado por pares
Marcos Flávio de Campos, José Adílson de Castro,
In magnets based in phases with high magnetocrystalline anisotropy like Nd2Fe14B or SmCo5 there is a competition between magnetostatic energy and domain wall energies. If the grain size is large, the formation of domain walls is energetically favorable. When the formation of domain walls is an unfavorable process, coercivity is larger. A better comprehension of this phenomenon is possible if the energy necessary for the first domain wall formation is properly evaluated. To address this problem, ...
Tópico(s): Magnetic properties of thin films
2010 - Trans Tech Publications | Materials science forum
Produção Nacional
Flavio Peckolt Campos, Nello Cristianini,
Yeasts and lactic acid bacteria are the usual contaminants in orange juice and responsible for decreasing the shelf life of the product. Ultra high-pressure homogenisation has been shown to be an alternative to the traditional thermal pasteurisation of pumpable foods. The product was pumped through a homogeniser valve at 100 MPa, 150 MPa, 200 MPa, 250 MPa and 300 MPa using two synchronized overlapped intensifiers at a flow rate of approximately 270 mL/min. The inlet temperature was kept at 10 °C, ...
Tópico(s): Magnetic and Electromagnetic Effects
2007 - Elsevier BV | Innovative Food Science & Emerging Technologies
Produção Nacional
Revisado por pares
Marcos Flávio de Campos, M.A. Campos, Fernando José Gomes Landgraf, Linilson Rodrigues Padovese,
Grain oriented electrical steels present strong anisotropy, due to a {110} texture (Goss), with [100] direction parallel to rolling direction (RD) and [110] direction parallel to transverse direction (TD). MBN (Magnetic Barkhausen Noise) were employed to measure magnetic properties in several angles towards RD using a 15° step. For 90° to the rolling direction (i.e., TD), the MBN signal changes, decreasing the MBNrms. It is found a connection between initial permeability and MBNrms. The lower initial permeability ...
Tópico(s): Microstructure and Mechanical Properties of Steels
2011 - IOP Publishing | Journal of Physics Conference Series
Produção Nacional
Revisado por pares
J. Capó-Sánchez, Marcos Flávio de Campos, Linilson Rodrigues Padovese,
The Magnetic Barkhausen Noise (MBN) technique can evaluate both micro- and macro-residual stresses, and provides indication about the relevance of contribution of these different stress components. MBN measurements were performed in AISI 1070 steel sheet samples, where different strains were applied. The Barkhausen emission is also analyzed when two different sheets, deformed and non-deformed, are evaluated together. This study is useful to understand the effect of a deformed region near the surface ...
Tópico(s): Force Microscopy Techniques and Applications
2011 - Elsevier BV | Journal of Magnetism and Magnetic Materials
Produção Nacional
Revisado por pares
Marcos Flávio de Campos, S.A. Romero, Fernando José Gomes Landgraf, F.P. Missell,
The Callen-Liu-Cullen (CLC) modification of the Stoner-Wohlfarth model was found able to describe properly the hysteresis curves of isotropic Sm(CoFeCuZr)z magnets. The SW-CLC model uses three parameters, and all of them have physical meaning. One of the parameters is related to the saturation magnetization, another to the anisotropy field, and another is 1/d, which evaluates the interaction between grains or particles. The model was applied for several magnets, indicating an anisotropy field of ...
Tópico(s): Magnetic properties of thin films
2011 - IOP Publishing | Journal of Physics Conference Series
Produção Nacional
Marcos Flávio de Campos, Taeko Yonamine, Marcos Fukuhara, Fernando José Gomes Landgraf, Carlos A. Achete, F.P. Missell,
The effect of grain size on iron losses were compared for two electrical steels with 0.5 and 1.5 wt% Si. The results confirm that the optimum grain size for minimizing the energy losses decreases when the electrical resistivity decreases or when the frequency increases. Experimental results are compared to a model which considers the influence of grain size. The recrystallization texture of the alloys varies little with grain size and consists mainly of the fibers {111}languvwrang and lang110rang// ...
Tópico(s): Electromagnetic Effects on Materials
2006 - IEEE Magnetics Society | IEEE Transactions on Magnetics
Produção Nacional
Revisado por pares
Marcos Flávio de Campos, M. Emura, Fernando José Gomes Landgraf,
Tópico(s): Microstructure and Mechanical Properties of Steels
2006 - Elsevier BV | Journal of Magnetism and Magnetic Materials
Produção Nacional
Revisado por pares
M. J. Sablik, Fernando José Gomes Landgraf, Rodrigo Magnabosco, Marcos Fukuhara, Marcos Flávio de Campos, R. Machado, F.P. Missell,
Tópico(s): Microstructure and Mechanical Properties of Steels
2006 - Elsevier BV | Journal of Magnetism and Magnetic Materials
Produção Nacional
Revisado por pares
The coercivity of sintered magnets like barium ferrite (BaFe12O19), samarium-cobalt (SmCo5) or neodymium-iron-boron (Nd2Fe14B) is largely affected by the grain size. A method to evaluate coercivity behavior as function of the crystalline orientation, including also the effects of grain size and lattice defects, is presented. Expressions were deduced to estimate the critical size of nucleus for spontaneous reversion of magnetization. The model indicates that the nucleation in grains of materials with ...
Tópico(s): Magnetic Properties and Applications
2006 - Trans Tech Publications | Materials science forum
Produção Nacional
Revisado por pares
E.A. Périgo, Marcos Flávio de Campos, Rubens Nunes de Faria, Fernando José Gomes Landgraf,
The effects of the compaction step on the (micro)structural features and aging behavior of polymer coated NdFeB-based bonded magnets is reported. Due to the fracture of the material during pressing, it is estimated an increase of at least 14% in the particles' area which is not coated. Such uncoated surfaces, when exposed to the environment, reduce the magnetic performance of the magnets aged/cured in air by 19% in the conditions evaluated in this investigation. Furthermore, XRD results interpreted ...
Tópico(s): Magnetic Properties and Applications
2012 - Elsevier BV | Powder Technology