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  1. Article ; Online: Cone beam computed tomography devices in the evaluation of buccal bone in anterior teeth.

    Dantas, L L / Ferreira, P P / Oliveira, Lsaf / Neves, F S / Campos, Psf / Scarfe, W C / Crusoe-Rebello, I

    Australian dental journal

    2019  Volume 64, Issue 2, Page(s) 161–166

    Abstract: Objective: To determine the accuracy of various cone beam computed tomography (CBCT) devices in assessing the buccal bone in anterior teeth.: Material and methods: A skull encased in tissue equivalent material was imaged with six CBCT devices: 3D ... ...

    Abstract Objective: To determine the accuracy of various cone beam computed tomography (CBCT) devices in assessing the buccal bone in anterior teeth.
    Material and methods: A skull encased in tissue equivalent material was imaged with six CBCT devices: 3D Accuitomo 170 (J. Morita, Japan), CS 9000 3D (Carestream Dental, France), CS 9300 (Carestream Dental, France), Eagle 3D (Dabi Atlante, Brazil), i-CAT Classic (Imaging Sciences International, USA) and Orthophos XG 3D (Sirona Dental System, USA). The exposure and acquisition protocols were determined using the manufacturer's guidelines, the voxel size adjusted as close as possible to 0.2 mm. Cross-sectional images were evaluated randomly, and the buccal bone was assessed.
    Results: The statistics were calculated based on a logistic regression model with the significance level set at 5%. All CBCT devices showed high accuracy; however, observers noted that the accuracy and sensitivity of CS 9300 device were slightly superior.
    Conclusion: The diagnostic performance of all CBCT devices was high for the evaluation of buccal bone in anterior teeth. When the clinical usefulness of an imaging modality is equivalent, the choice of appropriate imaging should be directed towards the modality that delivers the least radiation dose to the patient for a specific diagnostic task.
    MeSH term(s) Cone-Beam Computed Tomography/methods ; Cross-Sectional Studies ; Humans ; Image Processing, Computer-Assisted ; Imaging, Three-Dimensional ; Mandible/anatomy & histology ; Mandible/diagnostic imaging ; Maxilla/anatomy & histology ; Maxilla/diagnostic imaging
    Language English
    Publishing date 2019-04-26
    Publishing country Australia
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 603965-0
    ISSN 1834-7819 ; 0045-0421
    ISSN (online) 1834-7819
    ISSN 0045-0421
    DOI 10.1111/adj.12685
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  2. Article ; Online: Vitamin D supplementation improves the metabolic syndrome risk profile in postmenopausal women.

    Ferreira, P P / Cangussu, L / Bueloni-Dias, F N / Orsatti, C L / Schmitt, E B / Nahas-Neto, J / Nahas, E A P

    Climacteric : the journal of the International Menopause Society

    2019  Volume 23, Issue 1, Page(s) 24–31

    Abstract: Objective: ...

    Abstract Objective:
    MeSH term(s) Aged ; Biomarkers/blood ; Dietary Supplements ; Female ; Humans ; Metabolic Syndrome/blood ; Metabolic Syndrome/prevention & control ; Middle Aged ; Postmenopause ; Risk Factors ; Vitamin D/administration & dosage ; Vitamin D/analogs & derivatives ; Vitamin D/blood ; Vitamin D Deficiency/drug therapy ; Vitamins/administration & dosage
    Chemical Substances Biomarkers ; Vitamins ; Vitamin D (1406-16-2) ; 25-hydroxyvitamin D (A288AR3C9H)
    Language English
    Publishing date 2019-05-28
    Publishing country England
    Document type Journal Article ; Randomized Controlled Trial
    ZDB-ID 1469153-x
    ISSN 1473-0804 ; 1369-7137
    ISSN (online) 1473-0804
    ISSN 1369-7137
    DOI 10.1080/13697137.2019.1611761
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  3. Book ; Online: Superconductivity in Te-deficient ZrTe$_2$

    Correa, L. E. / Ferreira, P. P. / de Faria, L. R. / Fim, V. M. / da Luz, M. S. / Torikachvili, M. S. / Heil, C. / Eleno, L. T. F. / Machado, A. J. S.

    2022  

    Abstract: We present structural, electrical, and thermoelectric potential measurements on high-quality single crystals of ZrTe$_{1.8}$ grown from isothermal chemical vapor transport. These measurements show that the Te-deficient ZrTe$_{1.8}$, which forms the same ... ...

    Abstract We present structural, electrical, and thermoelectric potential measurements on high-quality single crystals of ZrTe$_{1.8}$ grown from isothermal chemical vapor transport. These measurements show that the Te-deficient ZrTe$_{1.8}$, which forms the same structure as the non-superconducting ZrTe$_2$, is superconducting below 3.2\,K. The temperature dependence of the upper critical field (H$_{c2}$) deviates from the behavior expected in conventional single-band superconductors, being best described by an electron-phonon two-gap superconducting model with strong intraband coupling. For the ZrTe$_{1.8}$ single crystals, the Seebeck potential measurements suggest that the charge carriers are predominantly negative, in agreement with the ab initio calculations. Through first-principles calculations within DFT, we show that the slight reduction of Te occupancy in ZrTe$_2$ unexpectedly gives origin to density of states peaks at the Fermi level due to the formation of localized Zr-$d$ bands, possibly promoting electronic instabilities at the Fermi level and an increase at the critical temperature according to the standard BCS theory. These findings highlight that the Te deficiency promotes the electronic conditions for the stability of the superconducting ground state, suggesting that defects can fine-tune the electronic structure to support superconductivity.
    Keywords Condensed Matter - Superconductivity ; Condensed Matter - Materials Science
    Subject code 541
    Publishing date 2022-12-05
    Publishing country us
    Document type Book ; Online
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  4. Book ; Online: Nodeless time-reversal symmetry breaking in the centrosymmetric superconductor Sc$_5$Co$_4$Si$_{10}$ probed by muon-spin spectroscopy

    Bhattacharyya, A. / Lees, M. R. / Panda, K. / Ferreira, P. P. / Dorini, T. T. / Gaudry, Emilie / Eleno, L. T. F. / Anand, V. K. / Sannigrahi, J. / Biswas, P. K. / Tripathi, R. / Adroja, D. T.

    2022  

    Abstract: We investigate the superconducting properties of Sc$_{5}$Co$_{4}$Si$_{10}$ using low-temperature resistivity, magnetization, heat capacity, and muon-spin rotation and relaxation ($\mu$SR) measurements. We find that Sc$_{5}$Co$_{4}$Si$_{10}$ {exhibits ... ...

    Abstract We investigate the superconducting properties of Sc$_{5}$Co$_{4}$Si$_{10}$ using low-temperature resistivity, magnetization, heat capacity, and muon-spin rotation and relaxation ($\mu$SR) measurements. We find that Sc$_{5}$Co$_{4}$Si$_{10}$ {exhibits type-II} superconductivity with a superconducting transition temperature $T_\mathrm{C}= 3.5 (1)$\,K. The temperature dependence of the superfluid density obtained from transverse-field $\mu$SR spectra is best modeled using an isotropic Bardeen-Cooper-Schrieffer type $s$-wave gap symmetry with $2\Delta/k_\mathrm{B}T_\mathrm{C} = 2.84(2)$. However, the zero-field muon-spin relaxation asymmetry reveals the appearance of a spontaneous magnetic field below $T_\mathrm{C}$, indicating that time-reversal symmetry (TRS) is broken in the superconducting state. Although this behavior is commonly associated with non-unitary or mixed singlet-triplet pairing, our group-theoretical analysis of the Ginzburg-Landau free energy alongside density functional theory calculations indicates that unconventional mechanisms are pretty unlikely. Therefore, we have hypothesized that TRS breaking may occur via a conventional electron-phonon process.

    Comment: 9 pages, 6 figures
    Keywords Condensed Matter - Superconductivity ; Condensed Matter - Materials Science ; Condensed Matter - Strongly Correlated Electrons
    Publishing date 2022-05-19
    Publishing country us
    Document type Book ; Online
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  5. Article ; Online: Electron-phonon superconductivity in C-doped topological nodal-line semimetal Zr

    Bhattacharyya, A / Ferreira, P P / Panda, K / Masunaga, S H / de Faria, L R / Correa, L E / Santos, F B / Adroja, D T / Yokoyama, K / Dorini, T T / Jardim, R F / Eleno, L T F / Machado, A J S

    Journal of physics. Condensed matter : an Institute of Physics journal

    2021  Volume 34, Issue 3

    Abstract: In the present work, we demonstrate that C-doped ... ...

    Abstract In the present work, we demonstrate that C-doped Zr
    Language English
    Publishing date 2021-11-02
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472968-4
    ISSN 1361-648X ; 0953-8984
    ISSN (online) 1361-648X
    ISSN 0953-8984
    DOI 10.1088/1361-648X/ac2bc7
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  6. Book ; Online: Electron-phonon superconductivity in C-doped topological nodal-line semimetal Zr$_5$Pt$_3$

    Bhattacharyya, A / Ferreira, P P / Panda, K / Santos, F B / Adroja, D T / Yokoyama, K / Dorini, T T / Eleno, L T F / Machado, A J S

    A muon spin rotation and relaxation ($\mu$SR) study

    2021  

    Abstract: In the present work we demonstrate that C-doped Zr$_{5}$Pt$_{3}$ is an electron-phonon superconductor (with critical temperature T$_\mathrm{C}$ = 3.7\,K) with a nonsymmorphic topological Dirac nodal-line semimetal state, which we report here for the ... ...

    Abstract In the present work we demonstrate that C-doped Zr$_{5}$Pt$_{3}$ is an electron-phonon superconductor (with critical temperature T$_\mathrm{C}$ = 3.7\,K) with a nonsymmorphic topological Dirac nodal-line semimetal state, which we report here for the first time. The superconducting properties of Zr$_{5}$Pt$_{3}$C$_{0.5}$ have been investigated by means of magnetization and muon spin rotation and relaxation ($\mu$SR) measurements. We find that at low temperatures the depolarization rate is almost constant and can be well described by a single-band $s-$wave model with a superconducting gap of $2\Delta(0)/k_\mathrm{B}T_\mathrm{C}$ = 3.84, close to the value of BCS theory. From transverse field $\mu$SR analysis we estimate the London penetration depth $\lambda_{L}$ = 469 nm, superconducting carrier density $n_{s}$ = 2$\times$10$^{26}$ $m^{-3}$, and effective mass m$^{*}$ = 1.584 $m_{e}$. Zero field $\mu$SR confirms the absence of any spontaneous magnetic moment in the superconducting ground state. To gain additional insights into the electronic ground state of C-doped Zr$_5$Pt$_3$, we have also performed first-principles calculations within the framework of density functional theory (DFT). The observed homogenous electronic character of the Fermi surface as well as the mutual decrease of $T_\mathrm{C}$ and density of states at the Fermi level are consistent with the experimental findings. However, the band structure reveals the presence of robust, gapless fourfold-degenarate nodal lines protected by $6_{3}$ screw rotations and glide mirror planes. Therefore, Zr$_5$Pt$_3$ represents a novel, unprecedented condensed matter system to investigate the intricate interplay between superconductivity and topology.

    Comment: 9 pages, 5 figures
    Keywords Condensed Matter - Superconductivity ; Condensed Matter - Materials Science
    Subject code 541
    Publishing date 2021-04-21
    Publishing country us
    Document type Book ; Online
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  7. Book ; Online: Two-band superconductivity with unconventional pairing symmetry in HfV$_2$Ga$_4$

    Bhattacharyya, A. / Ferreira, P. P. / Santos, F. B. / Adroja, D. T. / Lord, J. S. / Correa, L. E. / Machado, A. J. S. / Manesco, A. L. R. / Eleno, L T. F.

    2019  

    Abstract: In this letter, we have examined the superconducting ground state of the HfV$_2$Ga$_4$ compound using resistivity, magnetization, zero-field (ZF) and transverse-field (TF) muon-spin relaxation and rotation ($\mu$SR) measurements. Resistivity and ... ...

    Abstract In this letter, we have examined the superconducting ground state of the HfV$_2$Ga$_4$ compound using resistivity, magnetization, zero-field (ZF) and transverse-field (TF) muon-spin relaxation and rotation ($\mu$SR) measurements. Resistivity and magnetization unveil the onset of bulk superconductivity with $T_{\bf c}\sim$ 3.9~K, while TF-$\mu$SR measurements show that the temperature dependence of the superfluid density is well described by a nodal two-gap $s$+$d$-wave order parameter model. In addition, ZF muon relaxation rate increases with decreasing temperature below 4.6 K, indicating the presence of weak spin fluctuations. These observations suggest an unconventional multiband nature of the superconductivity possibly arising from the distinct $d$-bands of V and Hf ions with spin fluctuations playing an important role. To better understand these findings, we carry out first-principles electronic-structure calculations, further highlighting that the Fermi surface consists of multiple disconnected sheets with very different orbital weights and spin-orbit coupling, bridging the way for a nodal multiband superconductivity scenario. In this vein, therefore, HfV$_2$Ga$_4$-family stands out as an open avenue to novel unexplored unconventional superconducting compounds, such as ScV$_2$Ga$_4$ and ZrV$_2$Ga$_4$, and other many rare earths based materials.

    Comment: 5 pages, 3 figures
    Keywords Condensed Matter - Superconductivity ; Condensed Matter - Materials Science ; Condensed Matter - Strongly Correlated Electrons
    Subject code 530
    Publishing date 2019-09-24
    Publishing country us
    Document type Book ; Online
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  8. Article ; Online: Proposal to change the conserved type of Ipomoea, nom. cons. (Convolvulaceae)

    Eserman, L.A. / Sosef, M.S. / Simão‐Bianchini, R. / Utteridge, T.M. / Barbosa, J.C. / Buril, M.T. / Chatrou, L.W. / Clay, K. / Delgado, G. / Desquilbet, T.E. / Ferreira, P.P. / Grande Allende, J.R. / Hernández, A.L. / Huerta Ramos, G. / Jarret, Robert L. / Kojima, R.K. / Landrein, S. / Lourenço, J.A. / Man, I. de /
    Miller, R.E. / More, S. / Moreira, A.L. / Mwanga‐Mwanga, I. / Nhanala, S. / Pastore, M. / Petrongari, F.S. / Pisuttimarn, P. / Pornpongrungrueng, P. / Rifkin, J. / Santos, F.D. / Shimpale, V.B. / Silva, S.S. / Stinchcombe, J.R. / Traiperm, P. / Vasconcelos, L.V. / Wang, M.L. / Villordon, A. / Yang, J. / Yencho, G.C. / Heider, B. / Simões, A.R.G.

    TAXON

    2021  

    Abstract: Ipomoea L. is the largest (650–900 species, depending on the concept adopted) and most iconic genus in Convolvulaceae, a family of c. 1880 species (data from Staples, Convolvulaceae Unlimited, 2012 at: http//convolvulaceae.myspecies.info), including the ... ...

    Abstract Ipomoea L. is the largest (650–900 species, depending on the concept adopted) and most iconic genus in Convolvulaceae, a family of c. 1880 species (data from Staples, Convolvulaceae Unlimited, 2012 at: http//convolvulaceae.myspecies.info), including the important crop sweetpotato, Ipomoea batatas (L.) Lam. (Tabl. Encycl. 1: 465. 1793), and several ornamental species commonly known as “bindweeds” or “morning glories” (Wilkin in Kew Bull. 54: 853–876. 1999; Mabberley, Mabberley's Plant‐book. 2008). The genus has a long history of taxonomic and nomenclatural problems, mainly for the lack of a clear morphological circumscription and overlap with other genera. In his Species plantarum (1753), Linnaeus distinguished two genera, Convolvulus L. and Ipomoea, whose species suffered numerous re‐arrangements, between Ipomoea and Convolvulus, but especially into numerous more recently described genera, which amount today to a total of 60 (Staples in World Checklist of Vascular Plants, v.2.0. 2020, http://wcvp.science.kew.org/ retrieved 2 Apr 2020).
    Keywords ipomoea batatas ; convolvulaceae
    Language English
    Publishing date 2021-01-04T17:19:22Z
    Publisher Wiley
    Publishing country fr
    Document type Article ; Online
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  9. Article: Sinus histiocytosis with massive lymphadenopathy and malignant lymphoma. An unreported association.

    Rangwala, A F / Zinterhofer, L J / Nyi, K M / Ferreira, P P

    Cancer

    1990  Volume 65, Issue 4, Page(s) 999–1002

    Abstract: Sinus histiocytosis with massive lymphadenopathy is a benign disorder often characterized by spontaneous remission. Although immunologic abnormalities are common and high Epstein Barr virus titers have been reported, to date no case has been associated ... ...

    Abstract Sinus histiocytosis with massive lymphadenopathy is a benign disorder often characterized by spontaneous remission. Although immunologic abnormalities are common and high Epstein Barr virus titers have been reported, to date no case has been associated with malignant lymphoma. The authors report here the first case of this association.
    MeSH term(s) Biopsy ; Groin ; Histiocytosis, Sinus/complications ; Histiocytosis, Sinus/pathology ; Humans ; Kidney Neoplasms/complications ; Kidney Neoplasms/pathology ; Lymph Nodes/pathology ; Lymphatic Diseases/complications ; Lymphatic Diseases/pathology ; Lymphoma/complications ; Lymphoma/pathology ; Male ; Middle Aged ; Neck ; Palatal Neoplasms/complications ; Palatal Neoplasms/pathology
    Language English
    Publishing date 1990-02-15
    Publishing country United States
    Document type Case Reports ; Journal Article
    ZDB-ID 1429-1
    ISSN 1097-0142 ; 0008-543X ; 1934-662X
    ISSN (online) 1097-0142
    ISSN 0008-543X ; 1934-662X
    DOI 10.1002/1097-0142(19900215)65:4<999::aid-cncr2820650426>3.0.co;2-j
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  10. Article: Iatrogenic and idiopathic acute myelogenous leukemia: a comparison of clinical features and treatment complications.

    Williams, C K / Cuttner, J / Ohnuma, T / Ambinder, E P / Ferreira, P P / Holland, J F

    Medical oncology and tumor pharmacotherapy

    1987  Volume 4, Issue 2, Page(s) 59–66

    Abstract: We have compared the clinical and laboratory features as well as treatment complications observed in 6 patients with iatrogenic acute myelogenous leukemia (I-AML) with those of 26 patients with idiopathic acute myelogenous leukemia (AML). I-AML patients ... ...

    Abstract We have compared the clinical and laboratory features as well as treatment complications observed in 6 patients with iatrogenic acute myelogenous leukemia (I-AML) with those of 26 patients with idiopathic acute myelogenous leukemia (AML). I-AML patients were significantly younger and their disease appeared less virulent on admission than in the AML patients. Following identical chemotherapy, hemorrhagic complications and the need for platelet support were found to be similar for both groups. Major infections, including systemic candidiasis and Gram-negative septicemias, occurred 3 times more frequently among I-AML than AML patients. More marked suppression and delayed regeneration of the bone marrow also occurred in I-AML patients. These observations and other factors, such as post-splenectomy state and inherent immune deficiency among surgically staged lymphoma patients as well as radiation induced immunologic impairment, may have contributed to the increased propensity to develop infection observed in this group of patients. Five of the 6 I-AML and 17 of the 26 AML patients achieved remission. We attribute the satisfactory outcome in our I-AML patients to treatment in a protective environment and availability of facilities for hematologic supportive care.
    MeSH term(s) Adult ; Antineoplastic Combined Chemotherapy Protocols/adverse effects ; Antineoplastic Combined Chemotherapy Protocols/therapeutic use ; Bacterial Infections/etiology ; Female ; Humans ; Iatrogenic Disease/chemically induced ; Iatrogenic Disease/etiology ; Infection/etiology ; Leukemia, Myeloid, Acute/chemically induced ; Leukemia, Myeloid, Acute/complications ; Leukemia, Myeloid, Acute/drug therapy ; Male ; Middle Aged ; Prognosis
    Language English
    Publishing date 1987
    Publishing country England
    Document type Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 605563-1
    ISSN 0736-0118
    ISSN 0736-0118
    DOI 10.1007/bf02934941
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