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Anais da Academia Brasileira de Ciências

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https://www.readbyqxmd.com/read/27991970/experimental-validation-of-a-bearing-wear-model-using-the-directional-response-of-the-rotor-bearing-system
#1
Tiago Henrique Machado, Katia L Cavalca
The present work gives continuity in the analysis of the wear influence on cylindrical hydrodynamic bearings by presenting an experimental validation of the wear model previously proposed by the authors. This validation is carried on using the frequency response of the rotor-bearings system in directional coordinates. For this purpose, a test rig was assembled in order to evaluate the behavior of the rotating system when supported by hydrodynamic bearings with different wear patterns. The experimental measurements are used to validate the wear model, comparing the anisotropy influence on the experimental and numerical responses...
October 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27991969/effects-of-irrigation-intervals-and-organic-manure-on-morphological-traits-essential-oil-content-and-yield-of-oregano-origanum-vulgare-l
#2
Farzad Gerami, Parviz R Moghaddam, Reza Ghorbani, Abbas Hassani
In order to evaluate the effect of irrigation intervals and cattle manure levels on morphological traits, essential oil content and yield of oregano, an experiment was conducted at the experimental Farm of the Faculty of Agriculture, Urmia University, Iran. The experimental design was split-plots, arranged in randomized complete blocks with three replications. Main plots including irrigation intervals (1, 2 and 3 weeks) and four levels of cattle manure at 0, 10, 20 and 30 t ha-1 were allocated to sub plots...
October 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27991968/genetic-structure-from-the-oldest-jatropha-germplasm-bank-of-brazil-and-contribution-for-the-genetic-improvement
#3
Dalilhia N Dos Santos, Juliano L Ferreira, Tesfahun A Setotaw, Geraldo M A Cançado, Moacir Pasqual, Luciana C N Londe, Heloisa M Saturnino, Wagner A Vendrame
Jatropha is a potential oilseed crop, which requires mitigating factors such as the low genetic variability of the species. The solution runs through the research of Brazilian germplasm. Attention should be given to the germplasm of jatropha the north of Minas Gerais, because this is the oldest national collection and because this region may be a regions of jatropha diversity due to selection pressure arising from environmental adversities. Therefore, the objective of this study was to investigate the genetic diversity of 48 accessions of collection from Empresa de Pesquisa Agropecuária de Minas Gerais (EPAMIG), using SSR and ISSR markers...
October 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27991967/evaluation-of-deciduous-broadleaf-forests-mountain-using-satellite-data-using-neural-network-method-near-caspian-sea-in-north-of-iran
#4
Seyed A Hashemi
During the recent decades, deciduous forests have been molested by human intervention. Easy access, abundance and diversity of valuable forest products have led to increased population density, creating new residential areas and deforestation activities. Revealing changes is one of the fundamental methods in management and assessment of natural resources. This study is evaluated changes in forests area of 2013 using satellite images. In order to mapping the forest extent condition 2013, images of the mentioned years were digitized and geo-referenced by using the ground control points and the maps of mapping organization...
October 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27991966/genotypic-carriers-of-the-obesity-associated-fto-polymorphism-exhibit-different-cardiometabolic-profiles-after-an-intervention
#5
Greice G Moraes, Cézane P Reuter, Jane D P Renner, Elisa I Klinger, Michele B Ferreira, Elza D DE Mello, Andréia DE M Valim, Miria S Burgos
Background: Children and adolescents with at-risk genotypes (AA/AT) of the rs9939609 polymorphism in FTO, a fat mass and obesity-associated gene, may exhibit different cardiometabolic profile responses than subjects with the TT genotype after an interdisciplinary intervention. Methods: The sample consisted of 36 school children from southern Brazil. We used DNA quantitation and real-time polymerase chain reaction (PCR) for polymorphism genotyping. We measured anthropometric parameters (body mass index (BMI), waist circumference, hip circumference, waist-hip ratio, body fat percentage and skinfold sum), biochemical parameters (glucose, lipid profile, ultra-sensitive C-reactive protein, uric acid, alanine aminotransferase, aspartate aminotransferase, insulin and adiponectin) and blood pressure...
October 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27991965/popular-medicinal-uses-of-calea-uniflora-less-asteraceae-and-its-contribution-to-the-study-of-brazilian-medicinal-plants
#6
Luan S Ramos, Paula S Cardoso, Michele D Freitas, Renato Paghan, Marília S Borges, Vanilde Citadini-Zanette, James W Barlow, Patrícia A Amaral, Silvia Dalbó
Calea uniflora Less. is widely used in southern Santa Catarina (Brazil), but there are no scientific studies which support its use. Then, this study was proposed to determine of the percentage use of C. uniflora in a city of southern Brazil and documentation of the knowledge that the population has about this species. The survey was conducted with semi-structured interviews using a questionnaire applied to 372 participants. In analyzing the results, it was observed that of the 94.1% who recognized C. uniflora, 74...
October 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27991964/analysis-of-labour-risks-in-the-spanish-industrial-aerospace-sector
#7
Juan Laguardia, Emilio Rubio, Ana Garcia, Rafael Garcia-Foncillas
Labour risk prevention is an activity integrated within Safety and Hygiene at Work in Spain. In 2003, the Electronic Declaration for Accidents at Work, Delt@ (DELTA) was introduced. The industrial aerospace sector is subject to various risks. Our objective is to analyse the Spanish Industrial Aerospace Sector (SIAS) using the ACSOM methodology to assess its labour risks and to prioritise preventive actions. The SIAS and the Services Subsector (SS) were created and the relevant accident rate data were obtained...
October 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27991963/iron-restriction-increases-myoglobin-gene-and-protein-expression-in-soleus-muscle-of-rats
#8
Janaina S DE Souza, Erika L Brunetto, Maria Tereza Nunes
Iron is an important trace element for proper cell functioning. It is present in cytochromes, hemoglobin and myoglobin (Mb), where it binds to oxygen. It is also an electron acceptor in the respiratory chain. Mb is an 18 kDa heme-protein, highly expressed in skeletal muscle and heart. The expression of several genes involved in the metabolism of iron is post-transcriptionally regulated by this element. Iron was shown to interfere with the polyadenylation step, modifying their poly (A) tail length and, as a consequence, their stability and translation rate...
October 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27991962/the-complex-link-between-apoptosis-and-autophagy-a-promising-new-role-for-rb
#9
João M A Delou, Deborah Biasoli, Helena L Borges
Physiological processes, as autophagy, proliferation and apoptosis are affected during carcinogenesis. Restoring cellular sensitivity to apoptotic stimuli, such as the antineoplastic cocktails, has been explored as a strategy to eliminate cancer cells. Autophagy, a physiological process of recycling organelles and macromolecules can be deviated from homeostasis to support cancer cells survival, proliferation, escape from apoptosis, and therapy resistance. The relationship between autophagy and apoptosis is complex and many stimuli can induce both processes...
October 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27991961/method-validation-for-determination-of-metals-in-vitis-labrusca-l-grapevine-leaf-extracts-by-inductively-coupled-plasma-mass-spectrometry-icp-ms
#10
Liane V V Bokowski, Roberto B Sobrinho, Cristián J V Armijo, Caroline Dani, João A P Henriques, Cláudia Funchal
Vitis labrusca L. is the main species used for wine and juice production in Brazil. The grapevine leaves can be used both as functional foods and as cheapest sources for the extraction of phenolic compounds. Besides the antioxidant activity, grapevine leaves exhibited significant anti-inflammatory activity. Therefore, the aim of this study was to develop and validate an analytical methodology to determine the metals selenium (96Se), chromium (53Cr), nickel (62Ni), cadmium (111Cd) and lead (206Pb) in 30 samples of grapevine leaf extracts (Vitis labrusca, Bordo cultivar) using inductively coupled plasma mass spectrometry (ICP-MS)...
October 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27991960/agaricus-subrufescens-substratum-nitrogen-concentration-and-mycelial-extraction-method-on-antitumor-activity
#11
Míria B D Bertéli, Ana D Lopes, Itaruã M Colla, Giani A Linde, Nelson B Colauto
Antitumor activity of Agaricus subrufescens has been shown on vegetative mycelium and basidiocarp. However, few studies have assessed the effect of A. subrufescens cultivation conditions and extraction methods on antitumor activity. This study evaluated the effect of nitrogen concentration on the cultivation medium of A. subrufescens and the extraction method of mycelial antineoplastic actives against sarcoma 180 cells implanted in mice. Two nitrogen sources (isolated soybean protein and NaNO3) and 10 nitrogen concentrations (0...
October 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27991959/local-anesthetic-activity-from-extracts-fractions-and-pure-compounds-from-the-roots-of-ottonia-anisum-spreng-piperaceae
#12
Kelvin S E López, André M Marques, Davyson DE L Moreira, Leosvaldo S Velozo, Roberto T Sudo, Gisele Zapata-Sudo, Elsie F Guimarães, Maria Auxiliadora C Kaplan
Piperaceae species can be found worldwide in tropical and subtropical areas and many of them have been used for centuries in traditional folk medicine and in culinary. In Brazil, species of Piperaceae are commonly used in some communities as local anesthetic and analgesic. Countrified communities have known some species of the genus Ottonia as "anestesia" and it is a common habit of chewing leaves and roots of Ottonia species to relief toothache. The purpose of this study is to report our findings on new molecules entities obtained from the roots of Ottonia anisum Spreng, in which local anesthetic activity (sensory blockage) is demonstrated for the first time in vivo guinea pig model...
October 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27991958/influence-of-seasonal-variation-on-the-hydro-biogeochemical-characteristics-of-two-upland-lakes-in-the-southeastern-amazon-brazil
#13
Prafulla K Sahoo, José T F Guimarães, Pedro W M Souza-Filho, Marcio S DA Silva, Renato O Silva, Gustavo Pessim, Bergson C DE Moraes, Paulo F P Pessoa, Tarcísio M Rodrigues, Marlene F DA Costa, Roberto Dall'agnol
Limnological characteristics of the Violão and Amendoim lakes, in the Serra dos Carajás, Amazon, were studied interannually (2013-2014). Climate data indicate anomalous conditions during the 2013 rainy period with higher rainfall and lower temperature in the beginning (November). Lake levels were influenced after the first and second hour of each rainfall, which showed a strong synchronization between seasonal fluctuation of lake levels and local weather patterns. Based on the water quality, both lakes are classified as classes "1" and "2" in the CONAMA (Conselho Nacional do Meio Ambiente) scheme and as "excellent" to "good" in the WQI (Water Quality Index) categories...
October 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27991957/paralavas-in-the-cretaceous-paran%C3%A3-volcanic-province-brazil-a-genetic-interpretation-of-the-volcanic-rocks-containing-phenocrysts-and-glass
#14
Sérgio B Baggio, Léo A Hartmann, Rosa M S Bello
The occurrences of glassy rocks containing long and curved phenocrysts in the Paraná volcanic province, South America, are here interpreted as paralavas. The large number of thin (0.1-0.5 m) dikes and sills of glassy volcanic rocks with hopper, hollow or curved, large crystals of clinopyroxene (up to 10 cm), plagioclase (up to 1 cm), magnetite and apatite are contained in the core of thick (>70 m) pahoehoe flows. They are strongly concentrated in the state of Paraná, coincident with the presence of the large number of dikes in the Ponta Grossa arch...
October 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27991956/cord%C3%A3-o-formation-loess-deposits-in-the-southern-coastal-plain-of-the-state-of-rio-grande-do-sul-brazil
#15
Renato P Lopes, Sergio R Dillenburg, Cesar L Schultz
Loess consists of silt-dominated sediments that cover ~10% of the Earth's surface. In southern South America it occurs in Argentina, Bolivia, Paraguay and Uruguay, and its presence in southern Brazil was never studied in detail. Here is proposed a new lithostratigraphic unit, Cordão Formation, consisting of loess deposits in the southern Brazilian coastal plain. It consists of fine-very fine silt with subordinate sand and clay, found mostly in lowland areas between Pleistocene coastal barriers. These sediments are pale-colored (10YR hue) and forms ~1,5-2,0 meter-thick stable vertical walls...
October 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27991955/dating-stalagmite-from-caverna-do-diabo-devil%C3%A2-s-cave-by-tl-and-epr-techniques
#16
Shigueo Watanabe, Nilo F Cano, T K Gundu Rao, Betzabel N Silva-Carrera, Lucas S Carmo, Antonio J A Quina, Roseli F Gennari, Casimiro S Munita, Jorge S Ayala-Arenas, Bruno G Fernandes
A cylindrical fragment of stalagmite from Caverna do Diabo, State of São Paulo, Brazil, has been studied and dated by thermoluminescence and electron paramagnetic resonance techniques. The thermoluminescence glow curves of stalagmite samples and subsequently gamma irradiated, have shown rise of three peaks at 135, 180 and 265 °C. From electron paramagnetic resonance spectra of stalagmite was possible to clearly identify three paramagnetic centers in the g = 2.0 region: Centers I, II and III are due to , and , respectively...
October 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27991954/geostatistical-approach-for-spatial-interpolation-of-meteorological-data
#17
Derya Ozturk, Fatmagul Kilic
Meteorological data are used in many studies, especially in planning, disaster management, water resources management, hydrology, agriculture and environment. Analyzing changes in meteorological variables is very important to understand a climate system and minimize the adverse effects of the climate changes. One of the main issues in meteorological analysis is the interpolation of spatial data. In recent years, with the developments in Geographical Information System (GIS) technology, the statistical methods have been integrated with GIS and geostatistical methods have constituted a strong alternative to deterministic methods in the interpolation and analysis of the spatial data...
October 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27991953/barium-and-its-importance-as-an-indicator-of-paleo-productivity
#18
Bianca T P Liguori, Marcelo G DE Almeida, Carlos E DE Rezende
Barium (Ba) is a trace element which occurs predominantly as barite mineral (BaSO4) in the marine environment. Previous work suggests that barite concentrations are related to the organic carbon flux and marine biological debris in the water column suggesting a direct or indirect involvement in the marine biological cycling. In addition, barite has a high preservation rate (~30%) in sediments and it is less affected by early diagenesis than other proxies for productivity such as carbonates (~10%) and organic carbon (~1%), for example...
October 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27991952/enhancement-of-hevea-brasiliensis-properties-through-chemical-application
#19
Roszaini Kadir, Mohd D Jantan
The effects of four different types of bleaching agents (hydrogen peroxide, sodium hypochlorite, sodium chlorite and oxalic acid) mixed together with 2% boron-based preservative (Celbor SP) were studied on green sawn rubberwood. Two concentration levels (1% and 2%) of were used. Whitish values (W) and colour changes (ΔE) of sawn rubberwood were assessed before and after chemical treatment using a colour meter. Preliminary observation indicated that timber treated with 1% and 2% hydrogen peroxide produced better and more homogeneous colour properties...
October 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27991951/on-non-kupka-points-of-codimension-one-foliations-on-%C3%A2-3
#20
Omegar Calvo-Andrade, Maurício Côrrea, Arturo Fernández-Pérez
We study the singular set of a codimension one holomorphic foliation on ℙ 3 . We find a local normal form for these foliations near a codimension two component of the singular set that is not of Kupka type. We also determine the number of non-Kupka points immersed in a codimension two component of the singular set of a codimension one foliation on ℙ 3.
October 2016: Anais da Academia Brasileira de Ciências
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