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Article ; Online: New insights into the Gondwana breakup at the Southern South America by apatite fission-track analyses

C. H. Gomes / D. Almeida

Advances in Geosciences, Vol 47, Pp 1-

2019 Volume 15

Abstract: Apatite fission-track (AFT) analyses, applied to Southern Brazil and Uruguay samples, was employed aiming to understand the low temperature history of the Dom Feliciano Belt Segment. The Dom Feliciano Belt formed during the Neoproterozoic to Early ... ...

Abstract	Apatite fission-track (AFT) analyses, applied to Southern Brazil and Uruguay samples, was employed aiming to understand the low temperature history of the Dom Feliciano Belt Segment. The Dom Feliciano Belt formed during the Neoproterozoic to Early Paleozoic, linked to the Brasiliano/Pan-African Orogeny. Twenty-four samples were dated, and confined track lengths of twenty samples were measured. The spatial distribution of ages shows three domains with different evolution cut by shear zones and, or suture zones in the Dom Feliciano Belt. The Western Domain exhibits AFT ages > 250 Ma (Permian to Devonian) while the Eastern Domain shows AFT ages < 230 Ma (Paleogene to Triassic). In the Central Domain, the AFT ages range from ∼196 to 130 Ma (Jurassic to Early Cretaceous). The thermal modeling in the domains revealed a complex evolution, with cooling and reheating phases, and a denudation of ∼2600 m. The AFT ages clearly postdate the Gondwanide, Paraná-Etendeka and Rio Grande Cone exhumation history of the Dom Feliciano Belt.
Keywords	Science ; Q ; Geology ; QE1-996.5 ; Dynamic and structural geology ; QE500-639.5
Subject code	550
Language	English
Publishing date	2019-01-01T00:00:00Z
Publisher	Copernicus Publications
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Benquerencia (La Serena - Spain) rock art

P. Rosina / H. Collado / S. Garcês / H. Gomes / N. Eftekhari / M. Nicoli / C. Vaccaro

Heliyon, Vol 5, Iss 10, Pp e02561- (2019)

An integrated spectroscopy analysis with FTIR and Raman

2019

Abstract: La Serena region is a large plateau with open landscapes bounded in the south by a mountain chain formed by the Benquerencia, Tiros and La Rinconada Sierras. There are more than 300 painted and engraved sites in the region.Cueva Grande, Cueva de En medio ...

Abstract	La Serena region is a large plateau with open landscapes bounded in the south by a mountain chain formed by the Benquerencia, Tiros and La Rinconada Sierras. There are more than 300 painted and engraved sites in the region.Cueva Grande, Cueva de En medio and Cueva Pequeña are three Schematic rock art shelters located in the municipality of Benquerencia de la Serena, Badajoz, Spain. Over their panels have been documented more than a hundred of painted schematic figures (anthropomorphic figures, eye-shape figures and symbols) (Neolithic – Copper Age).Paintings are monochromatic with red or black coloration. A total of 13 samples (10 red and 3 black samples) from different panels were collected and analyzed using micro-Raman spectroscopy and ATR-FTIR.Micro-Raman spectroscopy was able to characterize the main mineral component, respectively hematite for the red figures and charcoal for the black paintings. ATR-FTIR was useful to possible ochre and possible organic identification. These latest results are particularly important for understanding manufacturing processes and addressing conservation problems.
Keywords	Archaeology ; Materials chemistry ; Analytical chemistry ; Geosciences ; Pigments ; Recipes ; Science (General) ; Q1-390 ; Social sciences (General) ; H1-99
Subject code	930
Language	English
Publishing date	2019-10-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Recharge contribution to the Guarani Aquifer System estimated from the water balance method in a representative watershed

Edson Wendland / Luis H. Gomes / Uwe Troeger

Anais da Academia Brasileira de Ciências, Vol 87, Iss 2, Pp 595-

2015 Volume 609

Abstract: The contribution of recharge to regional groundwater flow systems is essential information required to establish sustainable water resources management. The objective of this work was to determine the groundwater outflow in the Ribeirão da Onça Basin ... ...

Abstract	The contribution of recharge to regional groundwater flow systems is essential information required to establish sustainable water resources management. The objective of this work was to determine the groundwater outflow in the Ribeirão da Onça Basin using a water balance model of the saturated soil zone. The basin is located in the outcrop region of the Guarani Aquifer System (GAS). The water balance method involved the determination of direct recharge values, groundwater storage variation and base flow. The direct recharge was determined by the water table fluctuation method (WTF). The base flow was calculated by the hydrograph separation method, which was generated by a rain-flow model supported by biweekly streamflow measurements in the control section. Undisturbed soil samples were collected at depths corresponding to the variation zone of the groundwater level to determine the specific yield of the soil (drainable porosity). Water balances were performed in the saturated zone for the hydrological years from February 2004 to January 2007. The direct recharge ranged from 14.0% to 38.0%, and groundwater outflow from 0.4% to 2.4% of the respective rainfall during the same period.
Keywords	Água subterrânea ; monitoramento ; recarga ; rendimento específico ; WTF ; Science ; Q
Subject code	550
Language	English
Publishing date	2015-06-01T00:00:00Z
Publisher	Academia Brasileira de Ciências
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Useful Ultrasonographic Parameters to Predict Difficult Laryngoscopy and Difficult Tracheal Intubation—A Systematic Review and Meta-Analysis

Sara H. Gomes / Ana M. Simões / Andreia M. Nunes / Marta V. Pereira / Wendy H. Teoh / Patrício S. Costa / Michael S. Kristensen / Pedro M. Teixeira / José Miguel Pêgo

Frontiers in Medicine, Vol

2021 Volume 8

Abstract: Unexpected difficult airway management can cause significant morbidity and mortality in patients admitted for elective procedures. Ultrasonography is a promising tool for perioperative airway assessment, nevertheless it is still unclear which sonographic ...

Abstract	Unexpected difficult airway management can cause significant morbidity and mortality in patients admitted for elective procedures. Ultrasonography is a promising tool for perioperative airway assessment, nevertheless it is still unclear which sonographic parameters are useful predictors of difficult laryngoscopy and tracheal intubation. To determine the ultrasonographic predictors of a difficult airway that could be applied for routine practice, a systematic review and meta-analysis was conducted. Literature search was performed on PubMED, Web of Science and Embase using the selected keywords. Human primary studies, published in English with the use of ultrasonography to prediction of difficult laryngoscopy or tracheal intubation were included. A total of 19 articles (4,570 patients) were analyzed for the systematic review and 12 articles (1,141 patients) for the meta-analysis. Standardized mean differences between easy and difficult laryngoscopy groups were calculated and the parameter effect size quantified. A PRISMA methodology was used and the critical appraisal tool from Joanna Briggs Institute was applied. Twenty-six sonographic parameters were studied. The overall effect of the distance from skin to hyoid bone (p = 0.02); skin to epiglottis (p = 0.02); skin to the anterior commissure of vocal cords (p = 0.02), pre-epiglottis space to distance between epiglottis and midpoint between vocal cords (p = 0.01), hyomental distance in neutral (p < 0.0001), and extended (p = 0.0002) positions and ratio of hyomental distance in neutral to extended (p = 0.001) was significant. This study shows that hyomental distance in the neutral position is the most reliable parameter for pre-operative airway ultrasound assessment. The main limitations of the study are the small sample size, heterogeneity of studies, and absence of a standardized ultrasonographic evaluation method [Registered at International prospective register of systematic reviews (PROSPERO): number 167931].
Keywords	airway ultrasound assessment ; prediction of difficult intubation ; prediction of difficult laryngoscopy ; ultrasound predictors of difficult intubation ; ultrasound predictors of difficult laryngoscopy ; Medicine (General) ; R5-920
Language	English
Publishing date	2021-05-01T00:00:00Z
Publisher	Frontiers Media S.A.
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Exercise on a vibratory platform increases blood perfusion on the stifle joint and rectal temperature in healthy dogs

J.A. Villanova Junior / G. Dipp / B.M. Viveiros / J.L. Balardini / L.J.E. Isaka / C.L. Santos / G.H. Gomes / C.T. Pimpão / P.V. Michelotto Junior

Arquivo Brasileiro de Medicina Veterinária e Zootecnia, Vol 72, Iss 2, Pp 305-

2020 Volume 311

Abstract: ABSTRACT The effects of two vibration platform (VP) exercise protocols on stifle and rectal temperatures were evaluated. Eleven animals participated in two exercise protocols, different in duration in each exercise. Exercise protocol 1 (EP1) took 30 ... ...

Abstract	ABSTRACT The effects of two vibration platform (VP) exercise protocols on stifle and rectal temperatures were evaluated. Eleven animals participated in two exercise protocols, different in duration in each exercise. Exercise protocol 1 (EP1) took 30 seconds and EP2, 60 seconds, with different vibratory levels in both cases (L1 = acceleration ≅ 1g, L4 = acceleration ≅ 2.5g, and L7 = acceleration ≅ 5g). The animals were evaluated before and 1 minute after the exercise, using infrared thermography to obtain stifle temperatures. The rectal temperature (RT) was also checked at each moment. The dogs had higher stifle temperatures in EP1 at all vibratory levels compared to the time before the exercise; EP2 resulted in higher temperature only at maximum vibration intensity (L7). Increase in TR was observed only in EP2. The results suggested that the short duration protocol (EP1) increased the muscular and peripheral vascular activities of the joint, regardless of the vibration intensity. The long duration protocol (EP2) with maximum vibration intensity increased the RT, demonstrating activity beyond the stifle muscle group. It is concluded that exercises on the VP can be used as complementary therapy for low-impact muscle activity in dogs and may be adequate for efficient energy consumption.
Keywords	dogs ; joint ; perfusion ; stifle ; thermography ; Animal culture ; SF1-1100
Subject code	796
Language	English
Publishing date	2020-05-01T00:00:00Z
Publisher	Universidade Federal de Minas Gerais
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Absorption and fluorescence properties of chromophoric dissolved organic matter of the eastern Bering Sea in the summer with special reference to the influence of a cold pool

E. J. D'Sa / J. I. Goes / H. Gomes / C. Mouw

Biogeosciences, Vol 11, Iss 12, Pp 3225-

2014 Volume 3244

Abstract: The absorption and fluorescence properties of chromophoric dissolved organic matter (CDOM) are reported for the inner shelf, slope waters and outer shelf regions of the eastern Bering Sea during the summer of 2008, when a warm, thermally stratified ... ...

Abstract	The absorption and fluorescence properties of chromophoric dissolved organic matter (CDOM) are reported for the inner shelf, slope waters and outer shelf regions of the eastern Bering Sea during the summer of 2008, when a warm, thermally stratified surface mixed layer lay over a cold pool (< 2 °C) that occupied the entire middle shelf. CDOM absorption at 355 nm ( a g 355) and its spectral slope ( S ) in conjunction with excitation–emission matrix (EEM) fluorescence and parallel factor analysis (PARAFAC) revealed large variability in the characteristics of CDOM in different regions of the Bering Sea. PARAFAC analysis aided in the identification of three humic-like (components one, two and five) and two protein-like (a tyrosine-like component three, and a tryptophan-like component four) components. In the extensive shelf region, average absorption coefficients at 355 nm ( a g 355, m −1 ) and DOC concentrations (μM) were highest in the inner shelf (0.342 ± 0.11 m −1 , 92.67 ± 14.60 μM) and lower in the middle (0.226 ± 0.05 m −1 , 78.38 ± 10.64 μM) and outer (0.185 ± 0.05 m −1 , 79.24 ± 18.01 μM) shelves, respectively. DOC concentrations, however were not significantly different, suggesting CDOM sources and sinks to be uncoupled from DOC. Mean spectral slopes S were elevated in the middle shelf (24.38 ± 2.25 μm −1 ) especially in the surface waters (26.87 ± 2.39 μm −1 ) indicating high rates of photodegradation in the highly stratified surface mixed layer, which intensified northwards in the northern middle shelf likely contributing to greater light penetration and to phytoplankton blooms at deeper depths. The fluorescent humic-like components one, two, and five were most elevated in the inner shelf most likely from riverine inputs. Along the productive "green belt" in the outer shelf/slope region, absorption and fluorescence properties indicated the presence of fresh and degraded autochthonous DOM. Near the Unimak Pass region of the Aleutian Islands, low DOC and a g 355 (mean 66.99 ± 7.94 μM; 0.182 ± 0.05 m −1 ) and a high S (mean 25.95 ± 1.58 μm −1 ) suggested substantial photobleaching of the Alaska Coastal Water, but high intensities of humic-like and protein-like fluorescence suggested sources of fluorescent DOM from coastal runoff and glacier meltwaters during the summer. The spectral slope S vs. a g 355 relationship revealed terrestrial and oceanic end members along with intermediate water masses that were modeled using nonlinear regression equations that could allow water mass differentiation based on CDOM optical properties. Spectral slope S was negatively correlated ( r 2 = 0.79) with apparent oxygen utilization (AOU) for waters extending from the middle shelf into the deep Bering Sea indicating increasing microbial alteration of CDOM with depth. Although our data show that the CDOM photochemical environment of the Bering Sea is complex, our current information on its optical properties will aid in better understanding of the biogeochemical role of CDOM in carbon budgets in relation to the annual sea ice and phytoplankton dynamics, and to improved algorithms of ocean color remote sensing for this region.
Keywords	Ecology ; QH540-549.5 ; Life ; QH501-531 ; Geology ; QE1-996.5
Subject code	333
Language	English
Publishing date	2014-06-01T00:00:00Z
Publisher	Copernicus Publications
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: INTERPRETAÇÃO DE TESTE DE VAZÃO DE POÇO JORRANTE COM CORREÇÃO DE PERDA DE CARGA NA EDUTORA

Edson Wendland / Luís H. Gomes / Marli Torres

Revista Águas Subterrâneas, Vol 0, Iss

2008

Abstract: Aqüíferos confinados artesianos não necessitam de energia adicional (bombeamento) e a água subterrânea jorra naturalmente na cabeça do poço. Este estudo propõe uma correção para o método de teste de poço jorrante apresentado por Lohman (1972) a partir do ...

Abstract	Aqüíferos confinados artesianos não necessitam de energia adicional (bombeamento) e a água subterrânea jorra naturalmente na cabeça do poço. Este estudo propõe uma correção para o método de teste de poço jorrante apresentado por Lohman (1972) a partir do cálculo da perda de carga por atrito na coluna edutora. A aplicação do método proposto permitiu a determinação da transmissividade (T = 430 m2/d) e coeficiente de armazenamento (S = 2*10-5), representativos para o Aqüífero Guarani confinado na área de estudo. Ignorando a correção devido ao atrito na coluna edutora, o erro na transmissividade é de 19%. Para o coeficiente de armazenamento, o erro é de 5 ordens de magnitude, resultando em valores inaceitáveis do ponto de vista físico.
Keywords	teste de bombeamento ; aqüífero confinado ; hidrometria ; River ; lake ; and water-supply engineering (General) ; TC401-506 ; Physical geography ; GB3-5030
Language	English
Publishing date	2008-09-01T00:00:00Z
Publisher	Associação Brasileira de Águas Subterrâneas
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: ATENA–A Novel Rapidly Manufactured Medical Invasive Ventilator Designed as a Response to the COVID-19 Pandemic

Tiago Rebelo / Elizabete Neutel / Eurico Castro Alves / Francisco Barros / Hélder Oliveira / Humberto Machado / Joana Mendonça / João Fortuna Araújo / João Luís / José M. Pêgo / José Silva / Manuel Oliveira / Nuno Sousa / Paulo Figueiredo / Pedro Barata / Raquel Silva Magalhães / Rui Miguel Magalhães / Sara H. Gomes

Frontiers in Medicine, Vol

Testing Protocol, Safety, and Performance Validation

2021 Volume 8

Abstract: Background: The urgent need for mechanical ventilators to support respiratory insufficiency due to SARS-CoV-2 led to a worldwide effort to develop low-cost, easily assembled, and locally manufactured ventilators. The ATENA ventilator project was ... ...

Abstract	Background: The urgent need for mechanical ventilators to support respiratory insufficiency due to SARS-CoV-2 led to a worldwide effort to develop low-cost, easily assembled, and locally manufactured ventilators. The ATENA ventilator project was developed in a community-based approach targeting the development, prototyping, testing, and decentralized manufacturing of a new mechanical ventilator.Objective: This article aims to demonstrate ATENA's adequate performance and safety for clinical use.Material: ATENA is a low-cost ventilator that can be rapidly manufactured, easily assembled, and locally produced anywhere in the world. It was developed following the guidelines and requirements provided by European and International Regulatory Authorities (MHRA, ISO 86201) and National Authorities (INFARMED). The device was thoroughly tested using laboratory lung simulators and animal models.Results: The device meets all the regulatory requirements for pandemic ventilators. Additionally, the pre-clinical experiences demonstrated security and adequate ventilation and oxygenation, in vivo.Conclusion: The ATENA ventilator had a good performance in required tests in laboratory scenarios and pre-clinical studies. In a pandemic context, ATENA is perfectly suited for safely treating patients in need of mechanical ventilation.
Keywords	COVID-19 ; ATENA ; pandemic ; ventilator ; safety ; performance ; Medicine (General) ; R5-920
Subject code	670
Language	English
Publishing date	2021-08-01T00:00:00Z
Publisher	Frontiers Media S.A.
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Aerosols from anthropogenic and biogenic sources and their interactions – modeling aerosol formation, optical properties, and impacts over the central Amazon basin

J. P. Nascimento / M. M. Bela / B. B. Meller / A. L. Banducci / L. V. Rizzo / A. L. Vara-Vela / H. M. J. Barbosa / H. Gomes / S. A. A. Rafee / M. A. Franco / S. Carbone / G. G. Cirino / R. A. F. Souza / S. A. McKeen / P. Artaxo

Atmospheric Chemistry and Physics, Vol 21, Pp 6755-

2021 Volume 6779

Abstract: The Green Ocean Amazon experiment – GoAmazon 2014–2015 – explored the interactions between natural biogenic forest emissions from central Amazonia and urban air pollution from Manaus. Previous GoAmazon 2014–2015 studies showed that nitrogen oxide (NO x = ...

Abstract	The Green Ocean Amazon experiment – GoAmazon 2014–2015 – explored the interactions between natural biogenic forest emissions from central Amazonia and urban air pollution from Manaus. Previous GoAmazon 2014–2015 studies showed that nitrogen oxide (NO x = NO + NO 2 ) and sulfur oxide (SO x ) emissions from Manaus strongly interact with biogenic volatile organic compounds (BVOCs), affecting secondary organic aerosol (SOA) formation. In previous studies, ground-based and aircraft measurements provided evidence of SOA formation and strong changes in aerosol composition and properties. Aerosol optical properties also evolve, and their impacts on the Amazonian ecosystem can be significant. As particles age, some processes, such as SOA production, black carbon (BC) deposition, particle growth and the BC lensing effect change the aerosol optical properties, affecting the solar radiation flux at the surface. This study analyzes data and models SOA formation using the Weather Research and Forecasting with Chemistry (WRF-Chem) model to assess the spatial variability in aerosol optical properties as the Manaus plumes interact with the natural atmosphere. The following aerosol optical properties are investigated: single scattering albedo (SSA), asymmetry parameter ( g aer ), absorption Ångström exponent (AAE) and scattering Ångström exponent (SAE). These simulations were validated using ground-based measurements at three experimental sites, namely the Amazon Tall Tower Observatory – ATTO (T0a), downtown Manaus (T1), Tiwa Hotel (T2) and Manacapuru (T3), as well as the U.S. Department of Energy (DOE) Gulfstream 1 (G-1) aircraft flights. WRF-Chem simulations were performed over 7 d during March 2014. Results show a mean biogenic SOA (BSOA) mass enrichment of 512 % at the T1 site, 450 % in regions downwind of Manaus, such as the T3 site, and 850 % in areas north of the T3 site in simulations with anthropogenic emissions. The SOA formation is rather fast, with about 80 % of the SOA mass produced in 3–4 h. Comparing the plume from ...
Keywords	Physics ; QC1-999 ; Chemistry ; QD1-999
Subject code	620
Language	English
Publishing date	2021-05-01T00:00:00Z
Publisher	Copernicus Publications
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: BALANÇO HÍDRICO EM ZONA DE AFLORAMENTO DO SISTEMA AQÜÍFERO GUARANI A PARTIR DE MONITORAMENTO HIDROGEOLÓGICO EM BACIA REPRESENTATIVA

Carlos Eduardo A. G. Barreto / Luís H. Gomes / Edson Wendland

Revista Águas Subterrâneas, Vol 0, Iss

2010

Abstract: Este trabalho apresenta uma estimativa da recarga direta e profunda do Sistema Aqüífero Guarani (SAG) na bacia representativa do Ribeirão da Onça, localizada em zona de afloramento do SAG no Estado de São Paulo. Durante um ano foram monitoradas variáveis ...

Abstract	Este trabalho apresenta uma estimativa da recarga direta e profunda do Sistema Aqüífero Guarani (SAG) na bacia representativa do Ribeirão da Onça, localizada em zona de afloramento do SAG no Estado de São Paulo. Durante um ano foram monitoradas variáveis hidrológicas (precipitação, temperatura, vazão etc.) para a avaliação do balanço hídrico na bacia. Utilizando dados de variação do nível em 23 poços de monitoramento foram estimados a recarga direta, a variação do armazenamento subterrâneo e o escoamento de base. A recarga direta do sistema, na bacia, foi estimada em 29% da precipitação anual. Considerando a drenagem efetuada pelo Ribeirão da Onça, a recarga profunda, que pode efetivamente recarregar o SAG, é reduzida a 3,5% da precipitação anual.
Keywords	águas subterrâneas ; recarga ; hidrogeologia ; River ; lake ; and water-supply engineering (General) ; TC401-506 ; Physical geography ; GB3-5030
Language	English
Publishing date	2010-09-01T00:00:00Z
Publisher	Associação Brasileira de Águas Subterrâneas
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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