Souza F.M.,Minas Gerais State University
Materials Research | Year: 2017
Impedance Spectroscopy was performed to examine the electrical conductivity on KH2PO4 KDP, (NH4)H2PO4 ADP and K1-x(NH4)xH2PO4 (x = 0.076, 0.118, 0.357, 0.857, 0.942) crystals with increasing temperature. They were grown by solvent evaporation method. Zview simulation software was used to theoretically fit electrical conductivity results as a function of frequency (1-106 Hz) and temperature (20-160 °C) with equivalent circuits. These dielectric-Type materials become ionic conductors upon heating. Proton jumps in hydrogen bonds, heavier ions migration (K+ and NH4 +), and rotation and reorientation of ammonium groups contributed to electrical conduction. This conduction behavior follows the Arrhenius equation with which the activation energies were determined at different temperature ranges. For ADP-rich (x > 0.8) and pure ADP crystals the conductivities are higher than those for KDP-rich (x < 0.2) and pure KDP. Lattice defects may reduce electrical conductivities in the crystals with intermediate x composition. Complex permittivity ac and complex conductivity ac were also obtained for these crystals.
Mantovani J.R.,University of José do Rosário Vellano |
Spadon F.,Minas Gerais State University
Pesquisa Agropecuaria Tropical | Year: 2017
Urban waste compost has a potential to be used as an organic fertilizer in agriculture, but field studies are required to define the recommendable rates for crops. This study aimed at evaluating the effect of fertilization with urban waste compost on the soil chemical properties, yield, nutrient and heavy metal contents, in maize leaves and grains. The field experiment was carried out in a randomized complete block design, with seven treatments and four replications. The treatments consisted of six urban waste compost doses (0 Mg ha-1, 5 Mg ha-1, 10 Mg ha-1, 20 Mg ha-1, 30 Mg ha-1 and 40 Mg ha-1), applied in the planting furrow, plus an additional control treatment, with NPK mineral fertilization and no waste compost application. Fertilization with up to 40 Mg ha-1 of urban waste compost improves soil fertility. Fertilization with urban waste compost increases grain yield and the N, P and K contents in leaf tissue and maize grains, without inducing plant contamination with heavy metals. The application of 30 Mg ha-1 of urban waste compost can replace mineral fertilization in maize cultivation. © 2017, Universidade Federal De Goias (UFG). All rights reserved.
Rezende E.J.,Minas Gerais State University
Telemedicine journal and e-health : the official journal of the American Telemedicine Association | Year: 2013
The aim of this study is to report patient and physician profiles of those who used the teleconsultation system in the primary care health units of a health district in the city of Belo Horizonte, MG, Brazil. Data were collected from the telehealth attendance records of nine Primary Health Units (Unidade Básica de Saúde [UBS] in Portuguese) and from interviews carried out with the referring physicians. The criteria for inclusion required that data come from users seen by means of telehealth in the period between December 2004 and August 2010 and from the practitioners who saw them. The following were excluded: physicians who were not working in the UBS when the data were collected and a physician who did not agree to take part in the study. Two hundred sixty-three teleconsultations were analyzed, and 20 referring physicians were interviewed. The offline method was the most common. The physicians were predominantly female and had graduated over 11 years ago. The patients were predominantly adult women. After teleconsultation, a prescription was not necessary for 9.8% of patients. When required, 83.2% of the medication was available in the UBS. In 68.3% of cases, additional tests were required. The incorporation of these technologies prevented the physical referral of patients in 64.2% of cases. Telehealth resources can help to improve the provision of primary healthcare, reducing the number of physically referred patients. The number of teleconsultations is still small, and there is a need to encourage physicians to use the system.
Correspondence from Julio Porto-Carrero to Arthur Ramos: The Brazilian psychoanalytic society and concern over the translation of psychoanalytic terms in the 1920s and 1930s [Correspondência de Julio Porto-Carrero a Arthur Ramos: a Sociedade Brasileira de psicanálise e a preocupação com a tradução dos termos psicanalíticos, décadas de 1920 e 1930]
de Castro R.D.,Minas Gerais State University
Historia, Ciencias, Saude - Manguinhos | Year: 2015
The article presents the correspondence that psychiatrist Julio Porto-Carrero sent to psychiatrist Arthur Ramos in 1932 to inform him about the activities of the Brazilian Psychoanalytic Society and about a concern over systematizing the translation of certain psychoanalytic concepts into Portuguese. This correspondence is used in conjunction with the analysis of other sources to suggest that psychiatrists and psychoanalysts in Rio de Janeiro were then endeavoring to make a place for psychoanalysis in the day’s medical and scientific circles and encourage ever more specialists in Brazil to take an interest in Freud’s theory. © 2015, Fundacao Oswaldo Cruz. All rights reserved.
Corgosinho P.H.C.,Foundation Unesco HidroEx |
Corgosinho P.H.C.,Minas Gerais State University |
Schizas N.V.,University of Puerto Rico at San Juan
Journal of the Marine Biological Association of the United Kingdom | Year: 2013
Mesophotic coral ecosystems (MCEs) are found on the insular and continental slopes of Caribbean islands and comprise mainly scleractinian corals, sponges and macroalgae. These species provide habitat for a highly diverse and specialized crustacean fauna. A new genus and species of the family Louriniidae is described from samples taken from an MCE in south-west Puerto Rico. The new taxa can be diagnosed by: body elongate, almost cylindrical and with inconspicuous podoplean boundary between prosome and urosome; double genital somite with a discontinuous chitinized cuticular ridge; telson short with rectangular anal operculum; furca short; rostrum sinusoidal, well defined at the base; antennules 7-segmented with aesthetasc on the fourth segment; antenna with a brush-like basal seta and an abexopodal seta, exopod 1-segmented with 2 setae; endopod with 7 elements (1 geniculate seta and 1 modified inner spine); maxilliped well developed, prehensile, composed of syncoxa, basis, one segmented endopod and one claw-like apical seta; leg 1 endopod 3-segmented, first segment with a modified inner seta; legs 2, 3 and 4 with 2-segmented endopod with inner seta on the first segment; leg 5 basendopod fused, well developed with 4 setae, exopod well developed, with 5 setae; leg 6 represented by a single seta; and genital slits wide apart. The new genus and species can be confidently assigned to the family Louriniidae on the basis of the following synapomorphies: rostrum well-developed with rounded tip; antennule of female 7-segmented; mandible palp reduced; maxillule endopod and exopod absent; maxillae endopodite 2 represented by 3 setae; leg 5 basoendopod of female confluent, intercoxal sclerite absent, exopod 1-segmented; eggs retained in a single ventral egg sac; telson shorter than last urosomite; and furca short and with 6 setae. © 2012 Marine Biological Association of the United Kingdom.
Henriques A.B.,Minas Gerais State University |
Porto M.F.S.,Escola Nacional de Saude Publica Sergio Arouca Fiocruz
Ciencia e Saude Coletiva | Year: 2013
This article assesses aluminum production in Brazil and its social, environmental and public health impacts. The effects of the aluminum production chain challenge the idea of sustainable growth affirmed by business groups that operate in the sector. This article upholds the theory that the insertion of Brazil in the global aluminum market is part of a new configuration of the International Division of Labor (IDL), the polluting economic and highly energy dependent activities of which - as is the case of aluminum - have been moving to peripheral nations or emerging countries. The laws in such countries are less stringent, and similarly the environmental movements and the claims of the affected populations in the territories prejudiced in their rights to health, a healthy environment and culture are less influential. The competitiveness of this commodity is guaranteed in the international market, from the production of external factors such as environmental damage, deforestation, emissions of greenhouse gases and scenarios of environmental injustice. This includes undertakings in the construction of hydroelectric dams that expose traditional communities to situations involving the loss of their territories.
Goncalves C.E.,Minas Gerais State University |
Laier L.O.,Minas Gerais State University |
Silva M.J.D.,Minas Gerais State University
Catalysis Letters | Year: 2011
In this work, a novel process based on use of a SnCl2• 2H2O catalyst which is less corrosive, inexpensive, and a water tolerant Lewis acid was employed for synthesis of fuel bio-additives from glycerol. High yields and selectivities were achieved for glycerol esterification with acetic acid under mild reaction conditions. The SnCl 2 catalyst showed to be as active as p-toluene sulfonic and sulfuric acid, catalysts commonly used in acid-catalysed esterification reactions. However, its use has significant advantages in comparison to these Brønsted acid catalysts, including lower reactor corrosion and unnecessary neutralization at the end reaction. The SnCl2 catalyst can also be recovered and reused without loss of catalytic activity. Additionally, effects of reaction temperature, HOAc:glycerol molar ratio and catalyst concentration on both selectivity and yield of glycerol acetates were also investigated. The lower corrosiveness, facilitated handling, as well as potential for reuse without activity loss after simple recycle protocols are positive aspects of SnCl2 catalysts. © 2011 Springer Science+Business Media, LLC.
Neves P.D.M.,Minas Gerais State University |
Bellini M.,Multiprofissional em Saude Coletiva
Ciencia e Saude Coletiva | Year: 2013
This research is based on epidemiological records of toxicological occurrences in individual records of investigation into pesticide poisoning at the Maringá Intoxication Control Center at the Regional University Hospital of Maringá. The intoxications in patients poisoned from 2002 to 2011, in towns that comprise the Central Northern Paraná Geographic Mesoregion where Maringá is located, were taken into consideration in this study. As a result, it was established that approximately 67.12% of those poisoned were males, the age groups most affected are 20-29 years old and 30-39 years old. Suicide attempts appear as the main motivation for hospitalization (possibly disguising the chronic intoxication), and mainly insecticides and herbicides are involved in the poisonings, with 62.60% and 26%, respectively. Lastly, the urgent need for public health policies in to reduce this statistic immediately is self-evident, as these poisonings are the ones recorded, as those resulting from food poisoning are not being computed.
de Azevedo-Santos V.M.,Minas Gerais State University |
Rigolin-Sa O.,Minas Gerais State University |
Pelicice F.M.,Federal University of Tocantins
Neotropical Ichthyology | Year: 2011
Cage aquaculture has been developed in many countries, including Brazil. This form of production, although economically productive, may cause several impacts to the environment. Considering the historical relationship between aquaculture and species introduction, our study investigated the potential of cage aquaculture in spreading non-native species into hydroelectric reservoirs. We interviewed 19 fish farmers in Furnas Reservoir, Grande River basin. All producers have grown exclusively Nile tilapia (Oreochromis niloticus), an African fish, and all producers reported the occurrence of fish escapes. Releases were mainly accidental, but highly frequent during some management procedures, such as length classification, fish capture and juvenile stocking. Escapes were also reported due to cage damage and deliberate releases. These results indicate that, in cage aquaculture facilities, fish are frequently released to the external environment. When raising non-native species (e.g. Furnas Reservoir), these facilities constitute an important vector for fish introductions. © 2011 Sociedade Brasileira de Ictiologia.
Aroeira R.M.C.,Minas Gerais State University |
Leal J.S.,Minas Gerais State University |
De Melo Pertence A.E.,Minas Gerais State University
Spine | Year: 2011
Study Design. A new method for nonradiographic evaluation of scoliosis was independently compared with the Cobb radiographic method, for the quantification of scoliotic curvature. Objective. To develop a protocol for computerized photogrammetry, as a nonradiographic method, for the quantification of scoliosis, and to mathematically relate this proposed method with the Cobb radiographic method. Summary of Background Data. Repeated exposure to radiation of children can be harmful to their health. Nevertheless, no nonradiographic method until now proposed has gained popularity as a routine method for evaluation, mainly due to a low correspondence to the Cobb radiographic method. Methods. Patients undergoing standing posteroanterior full-length spine radiographs, who were willing to participate in this study, were submitted to dorsal digital photography in the orthostatic position with special surface markers over the spinous process, specifically the vertebrae C7 to L5. The radiographic and photographic images were sent separately for independent analysis to two examiners, trained in quantification of scoliosis for the types of images received. The scoliosis curvature angles obtained through computerized photogrammetry (the new method) were compared to those obtained through the Cobb radiographic method. Results. Sixteen individuals were evaluated (14 female and 2 male). All presented idiopathic scoliosis, and were between 21.4 ± 6.1 years of age; 52.9 ± 5.8 kg in weight; 1.63 ± 0.05 m in height, with a body mass index of 19.8 ± 0.2. There was no statistically significant difference between the scoliosis angle measurements obtained in the comparative analysis of both methods, and a mathematical relationship was formulated between both methods. Conclusion. The preliminary results presented demonstrate equivalence between the two methods. More studies are needed to firmly assess the potential of this new method as a coadjuvant tool in the routine following of scoliosis treatment. © 2011, Lippincott Williams & Wilkins.