Anais da Academia Brasileira de Ciencias最新文献_第10页

Addressing Gearbox Health Monitoring Challenges for Helicopters: A Machine Learning Approach. 解决直升机变速箱健康监测挑战：一种机器学习方法。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2024-12-16 eCollection Date: 2024-01-01 DOI: 10.1590/0001-3765202420240404

Guilherme Moreira, Alexandre Pereira, Airton Nabarrete, Willer Gomes

引用次数: 0

Water masses drive the spatial and temporal distribution of marine Archaea in the northern Antarctic Peninsula. 南极半岛北部海洋古菌的时空分布受水体影响。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2024-12-16 eCollection Date: 2024-01-01 DOI: 10.1590/0001-3765202420240585

Luana C Vargas, Laiza C Faria, Lucas T Pereira, Camila N Signori

{"title":"Water masses drive the spatial and temporal distribution of marine Archaea in the northern Antarctic Peninsula.","authors":"Luana C Vargas, Laiza C Faria, Lucas T Pereira, Camila N Signori","doi":"10.1590/0001-3765202420240585","DOIUrl":"https://doi.org/10.1590/0001-3765202420240585","url":null,"abstract":"The Southern Ocean influences the planet's biogeochemical cycles. Marine microorganisms are important in this scenario, being the main biological agents in the cycling of many elements. The Archaea domain is widely distributed in the oceans, and its presence in Antarctica is acknowledged. In this context, this work aimed to analyze the diversity and distribution of archaea according to environmental parameters in the waters surrounding the north of the Antarctic Peninsula. For environmental characterization studies, surface and bottom data were used for the ten monitoring stations of expeditions that took place in the summer of 2014 and 2015. The sequencing of the 16S rRNA gene was performed on the Illumina HiSeq platform, using the SILVA v138 database. The results revealed the presence of three main water bodies: Antarctic Surface Water, Shelf Waters, and modified Circumpolar Deep Water. Deep waters had higher diversity than surface waters, and the dominant groups were Nitrososphaeria and MGII. In the study region, the main factor responsible for the differences in the ecosystems was the presence of distinct water masses and the stratification of the water column. We argue that it is essential to consider water mass dynamics to study the microbial landscape of the Southern Ocean.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 suppl 2","pages":"e20240585"},"PeriodicalIF":1.1,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142852162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Allometric mixed-effects models for Dicksonia sellowiana Hook. and its contribution to biomass stocks of Araucaria forests in southern Brazil. 黄钩花异速生长混合效应模型。及其对巴西南部Araucaria森林生物量储量的贡献。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2024-12-16 eCollection Date: 2024-01-01 DOI: 10.1590/0001-3765202420230176

Laio Zimermann Oliveira, Alexander Christian Vibrans, Adilson Luiz Nicoletti, Jocasta Lerner

引用次数: 0

Spatial distribution of atmospheric pollutants and fire outbreaks in the Pantanal biome from 2016 to 2021. 2016 - 2021年潘塔纳尔生物群落大气污染物空间分布与火灾爆发

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2024-12-16 eCollection Date: 2024-01-01 DOI: 10.1590/0001-3765202420240174

Débora S Alvim, Cássio Aurélio Suski, Mariana C Kasemodel, Dirceu Luís Herdies, João H Megale, Rafael C G DE Oliveira, Monica Tais S D'Amelio, Simone Marilene S DA Costa, Sergio M Corrêa, Silvio N Figueroa

{"title":"Spatial distribution of atmospheric pollutants and fire outbreaks in the Pantanal biome from 2016 to 2021.","authors":"Débora S Alvim, Cássio Aurélio Suski, Mariana C Kasemodel, Dirceu Luís Herdies, João H Megale, Rafael C G DE Oliveira, Monica Tais S D'Amelio, Simone Marilene S DA Costa, Sergio M Corrêa, Silvio N Figueroa","doi":"10.1590/0001-3765202420240174","DOIUrl":"https://doi.org/10.1590/0001-3765202420240174","url":null,"abstract":"Pantanal fires have a significant impact on the environment. Anthropogenic emissions of residual gases have changed the tropospheric composition in this region due to burning. This study aims to analyze the spatial patterns of atmospheric pollutants (including carbon monoxide (CO), nitrogen dioxide (NO2), black carbon (BC), organic carbon (OC) and sulfur dioxide (SO2) and aerosol optical depth, along with fire outbreaks across the Pantanal biome from 2016 to 2021. The data collected is based on remote sensing data. The fire outbreaks peaked pollutant concentrations reached their highest between June to November, particularly during the drier months of August to October. This increase was even greater during the last three years (2019-2021), especially in 2020, when the average CO, NO2, SO2, BC, and OC concentrations increased by 29%, 31%, 50%, 52%, and 50%, respectively. The rainfall values do not justify the increase in the number of fire outbreaks between 2019 and 2021, indicating that the rise is likely due to increased burning. In 2021, the average monthly rainfall was 48% greater than that in 2016-2020 but it had the highest FRP value and the second highest fire outbreak number and pollutant concentration. The 2020 year experienced a record number of fire outbreaks and the highest levels of pollutants in the atmosphere in the region for this period.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 suppl 3","pages":"e20240174"},"PeriodicalIF":1.1,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142852210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nutritional evaluation of shrimp waste and its inclusion in laying diet for meat-type quails. 虾渣的营养评价及其在肉型鹌鹑产蛋日粮中的应用。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2024-12-16 eCollection Date: 2024-01-01 DOI: 10.1590/0001-3765202420230934

Juliana Braga Fileto, Rafael Carlos Nepomuceno, Thalles Ribeiro Gomes, Valquíria Sousa Silva, Edibergue Oliveira Dos Santos, Otoniel Félix DE Souza, Germana Costa Aguiar Watanabe, Paula Joyce Delmiro DE Oliveira Lima, Ednardo Rodrigues Freitas

{"title":"Nutritional evaluation of shrimp waste and its inclusion in laying diet for meat-type quails.","authors":"Juliana Braga Fileto, Rafael Carlos Nepomuceno, Thalles Ribeiro Gomes, Valquíria Sousa Silva, Edibergue Oliveira Dos Santos, Otoniel Félix DE Souza, Germana Costa Aguiar Watanabe, Paula Joyce Delmiro DE Oliveira Lima, Ednardo Rodrigues Freitas","doi":"10.1590/0001-3765202420230934","DOIUrl":"https://doi.org/10.1590/0001-3765202420230934","url":null,"abstract":"The research aimed to evaluate the shrimp waste meal (SWM1) in the diet of European quails in the production phase. A metabolism trial was performed with 96 quails of 28 days of age distributed in a completely randomized design with three treatments (reference diet and two test diets in which SWM replaced 20% and 40% of the reference diet) and four replications of eight birds. There was no difference in metabolizable energy values. In the performance trial 200 quails of 28 weeks of age were distributed in a completely randomized design with four treatments (0, 50 100 and 150 g/kg of inclusion of SWM) and five replications of ten birds. There was reduction in the nitrogen metabolization coefficient with the inclusion of 150 g/kg SWM. The feed intake, production and egg mass worsened with 150 g/kg inclusion. The inclusion of SWM at all levels reduced the values of specific gravity and Hugh units, and the level 150 g/kg promoted reduction in shell percentage and shell thickness. It was concluded that the metabolizable energy of SWM is 2,377 MJ/kg and that the inclusion of SWM in the diet of quails in production can be up to 100 g/kg.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 suppl 3","pages":"e20230934"},"PeriodicalIF":1.1,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142852209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Glaciochemistry and environmental interpretation of a snow core from West Antarctica. 南极西部一个雪核的冰川化学与环境解释。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2024-12-16 eCollection Date: 2024-01-01 DOI: 10.1590/0001-3765202420240243

Regina S Ferreira, Jefferson C Simões, Isaías U Thoen, Ronaldo T Bernardo

{"title":"Glaciochemistry and environmental interpretation of a snow core from West Antarctica.","authors":"Regina S Ferreira, Jefferson C Simões, Isaías U Thoen, Ronaldo T Bernardo","doi":"10.1590/0001-3765202420240243","DOIUrl":"https://doi.org/10.1590/0001-3765202420240243","url":null,"abstract":"This study investigated the chemical content of a shallow snow core (4.95 m) named TT 6, collected during a Brazilian traverse of the West Antarctic Ice Sheet in the 2014/2015 Austral summer. Stable isotope ratios (δD and δ18O) and ionic content, determined at the Centro Polar e Climático of the Federal University of Rio Grande do Sul (CPC/UFRGS), were used to date the core and reconstruct the climatic conditions at the site. The core represents approximately 11 years ± 6 months of precipitation, i.e., a mean net snow accumulation rate of 0.19 ± 0.02 m a-1 in water equivalent. Using the non-sea-salt sulfate values, we identified the 2011 Puyhue-Cordón (Chile) volcanic eruption signal, providing a reference horizon for dating. Anions represent 53.73% of the ionic content. We identified that 96.86% of calcium and 84.50% of sulfate are non-sea origin, while the acidic contribution is 25.62% H+. We observed high peaks in marine aerosols containing Na+, Cl-, and Mg2+ during winter, and results from the ERA5 global model (NOAA) indicated that El Niño events could influence Antarctic temperatures, facilitating the transport of marine aerosols to the continent.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 suppl 2","pages":"e20240243"},"PeriodicalIF":1.1,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142852141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Contribution of the special issue on the BRICS Astronomy Working Group to the AABC impact factor. 金砖国家天文工作组特刊对AABC影响因子的贡献。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2024-12-16 DOI: 10.1590/0001-37652024202496s3

Alexander W A Kellner

引用次数: 0

A third volume commemorating forty years of the Brazilian Antarctic Program. 第三卷纪念巴西南极计划四十周年。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2024-12-16 eCollection Date: 2024-01-01 DOI: 10.1590/0001-3765202420241261

Jefferson C Simões, Juliana M Sayão, Viviana Alder

引用次数: 0

Valorization of piassava fiber by its incorporation in adobe bricks. 番石榴纤维掺入土坯中的增值作用。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2024-12-13 eCollection Date: 2024-01-01 DOI: 10.1590/0001-3765202420240210

Cristian DA Conceição Gomes, Rafael DE Avila Delucis, Klaus Machado Theisen

{"title":"Valorization of piassava fiber by its incorporation in adobe bricks.","authors":"Cristian DA Conceição Gomes, Rafael DE Avila Delucis, Klaus Machado Theisen","doi":"10.1590/0001-3765202420240210","DOIUrl":"https://doi.org/10.1590/0001-3765202420240210","url":null,"abstract":"This study investigates valorization of piassava fiber through its incorporation in adobe bricks. The objective was to analyze the properties of adobe bricks reinforced with varying weight fractions of piassava fiber. The fibers were characterized for their chemical and physical characteristics, while the sand and clay were characterized for granulometry, XRD patterns, and EDX. Initial bricks were prepared with a constant piassava fiber weight fraction of 3% and varying sand:clay weight ratios. The mechanical properties of the adobe bricks were evaluated, and subsequent investigations involved variable fiber weight fractions of 0.5%, 1%, and 3%. Characterization included compressive characterization, apparent density, three-point bending, resistance to water erosion, and cracking behavior. The results showed that the physical and chemical characteristics of the fibers were consistent with the existing literature. The adobe bricks exhibited a range of apparent density values and compressive strength, with the S40C60P3 brick demonstrating higher strength and reduced crack visibility. The bricks with 3% fiber content outperformed others in terms of bending strength and displacement before fracture. Erosion tests revealed that higher fiber contents resulted in lower levels of mass loss and erosion depth. These findings highlight the potential of piassava fiber incorporation in adobe bricks for enhancing their properties.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 suppl 3","pages":"e20240210"},"PeriodicalIF":1.1,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142852211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cretaceous spreite-dominated ichnoassemblages in Antarctica. 南极洲白垩纪以雪龙为主的鱼类组合。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2024-12-13 eCollection Date: 2024-01-01 DOI: 10.1590/0001-3765202420240627

Daniel Sedorko, Carolina Gutiérrez, Pablo J Pazos, James H Nebelsick, Luiz Carlos Weinschütz, Mariana Almeida Gomes Garcia, Rodrigo Cardoso, Juliana Manso Sayão, Alexander W A Kellner

{"title":"Cretaceous spreite-dominated ichnoassemblages in Antarctica.","authors":"Daniel Sedorko, Carolina Gutiérrez, Pablo J Pazos, James H Nebelsick, Luiz Carlos Weinschütz, Mariana Almeida Gomes Garcia, Rodrigo Cardoso, Juliana Manso Sayão, Alexander W A Kellner","doi":"10.1590/0001-3765202420240627","DOIUrl":"https://doi.org/10.1590/0001-3765202420240627","url":null,"abstract":"This study investigates ichnoassemblages characterized by spreite trace fossils from the Upper Cretaceous Snow Hill Island Formation on Vega Island, Antarctica. The succession reveals alternating heterolithic beds of sandy siltstones to very fine- to fine-grained sandstones, suggestive of a deltaic depositional setting influenced by fluctuating energy conditions. The dominance of spreite structures, such as Paradictyodora antarctica and Euflabella, suggests the prevalence of a colonization window for deposit- or detritus-feeding activity. Notably, the prevalence of Euflabella towards the upper levels of the succession, in more proximal and impacted depositional setting, suggests an adaptive strategy for coping with varying food resources, corroborating its role as a trophic generalist. Additionally, the absence of distinct shifts between fully marine and stressed ichnofauna challenges a clear assignation to the Phycosiphon or Rosselia ichnofacies, although in vertical succession the Euflabella dominance in upper levels is related to a lower diverse ichnoassemblage than Paradictyodora in lower levels, suggesting some freshwater impact in the top. The occurrence of horizontal and vertical sessile deposit feeding structures would align with the Rosselia ichnofacies definition, but the presence of spreite burrows and high ichnodisparity better fits into the Cruziana ichnofacies. These spreite-dominated ichonoassemblages are here attributed to Cruziana ichnofacies.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 suppl 2","pages":"e20240627"},"PeriodicalIF":1.1,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142852127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0