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

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

Inhibition of human tumor cell migration by a rice-derived chimeric cysteine protease inhibitor. 水稻嵌合半胱氨酸蛋白酶抑制剂对人肿瘤细胞迁移的抑制作用。

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: 10.1590/0001-3765202420240778

Mateus Dias-Oliveira, Natalia Balbinott, Jéssica M O Ramos, João G Vasconcellos, Fátima Theresinha C R Guma, Geancarlo Zanatta, Rogerio Margis

引用次数: 0

May Antarctic plants grow on Martian and Lunar soil simulants under terrestrial conditions? 南极植物可以在火星和月球模拟土壤上生长吗？

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: 10.1590/0001-3765202420240571

Cesar R L Amaral, Dafne Anjos, Fábio L V Bones, Antonio Carlos DE Freitas, Maithê G P Magalhães, Lucas M Moreira, Rodrigo Goldenberg-Barbosa, Anna Donato

{"title":"May Antarctic plants grow on Martian and Lunar soil simulants under terrestrial conditions?","authors":"Cesar R L Amaral, Dafne Anjos, Fábio L V Bones, Antonio Carlos DE Freitas, Maithê G P Magalhães, Lucas M Moreira, Rodrigo Goldenberg-Barbosa, Anna Donato","doi":"10.1590/0001-3765202420240571","DOIUrl":"https://doi.org/10.1590/0001-3765202420240571","url":null,"abstract":"Extremophile organisms have been largely studied in Astrobiology. Among them, two antarctic plants emerge as good candidates to become colonizers of other celestial bodies, such as Mars and the Moon. The present research aimed to evaluate survival and growing capacity of Sanionia uncinata and Colobanthus quitensis on Martian (MGS-1) and Lunar (LMS-1) regolith simulants, under terrestrial conditions. The survival responses of both species on the simulators and the original sampling site of Antarctic soil were observed during 15 days, in laboratory conditions at 'Comandante Ferraz' Station. Based on physiological parameters changes under the three soil conditions tested, our results suggest that Martian soil can be too harsh for plant growth, showing expressive decay, especially for C. quitensis. While lunar soil might provide more favorable conditions, with less observed changes, similarly to how they would in Antarctic soil from their natural habitat. This preliminary study provides resources and fosters knowledge about the possibility of these Antarctic species to survive in extraterrestrial environments, starting with soil parameters; and discusses the importance and use of Antarctic plants in astrobiology.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 suppl 2","pages":"e20240571"},"PeriodicalIF":1.1,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142852147","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

Salt-affected soils in the Lopez de Bertodano Formation, polar semi-desert of Seymour Island, Antarctica: topographic or lithological controls? 南极洲西摩岛极地半沙漠洛佩斯-德-贝尔托达诺地层盐蚀土壤：地形或岩性控制？

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: 10.1590/0001-3765202420240584

Daniel N Krum, Carlos Ernesto G R Schaefer, Fábio S Oliveira, Roberto F M Michel, Heitor P Palma, Marcos Paulo E Tomaz, Ana Carolina P Amaral, Márcio R Francelino, Gustavo V Veloso

{"title":"Salt-affected soils in the Lopez de Bertodano Formation, polar semi-desert of Seymour Island, Antarctica: topographic or lithological controls?","authors":"Daniel N Krum, Carlos Ernesto G R Schaefer, Fábio S Oliveira, Roberto F M Michel, Heitor P Palma, Marcos Paulo E Tomaz, Ana Carolina P Amaral, Márcio R Francelino, Gustavo V Veloso","doi":"10.1590/0001-3765202420240584","DOIUrl":"https://doi.org/10.1590/0001-3765202420240584","url":null,"abstract":"Salinization is one of the main pedogenetic processes occurring on the semiarid zone of the Weddel sea, like in Seymour Island, where salt-affected soils are widespread. This study aimed to investigate whether topography controls the distribution of salt-affected soils on Seymour Island, particularly with reference to the Lopez de Bertodano Formation. Chemical and physical results from 45 soil profiles were used, where morphometric variables were extracted. Descriptive statistical analysis, extraction of morphometric variables, cluster analysis and principal component analysis were carried out in this database. The separation of soils associated with the López de Bertodano Formation into two groups is explained by topographic atributes, and not by soil properties. Hence, the salts in soils have a geogenic origin, and despite differences in geological units, the uniform mineralogical composition of all Lopez de Bertodano Formation results in the widespread accumulation of salts in soils, influenced by the saline parent material and the semi-desert climate. Despite the lack of topographic control in the distribution of saline soils as a whole, geomorphology play a distinct role in the formation of secondary saline features, such as crusts, efflorescences, and columnar structures, or in salt composition of salts present in the soils.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 suppl 2","pages":"e20240584"},"PeriodicalIF":1.1,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142852157","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

Vertical distribution of the zooplankton in the Antarctic Peninsula during the austral summer of 2017. 2017年南方夏季南极半岛浮游动物的垂直分布。

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: 10.1590/0001-3765202420240144

Camila M Leonor, Erik Muxagata

{"title":"Vertical distribution of the zooplankton in the Antarctic Peninsula during the austral summer of 2017.","authors":"Camila M Leonor, Erik Muxagata","doi":"10.1590/0001-3765202420240144","DOIUrl":"https://doi.org/10.1590/0001-3765202420240144","url":null,"abstract":"Zooplankton plays a crucial role as the primary consumers in the Southern Ocean and its ecological processes, particularly in the Antarctic Peninsula, influenced by regional glaciological and oceanographic changes. To assess the overall composition of these communities, vertical samples were collected at various depths using a Multinet at oceanographic stations in the Antarctic Peninsula during the XXXV OPERANTAR expedition in summer 2017. Abiotic data (temperature, salinity and chlorophyll-a) were collected using a CTD and a fluoremeter. Organisms were identified to a higher level, with Chaetognatha and Euphausiacea identified to species whenever possible. Copepoda were the most abundant (73.4%), with Calanoida present in all samples and more abundant at 300m. Salpidae ranked as the second most abundant taxon (16.6%) up to 100m. Three species of Chaetognatha were identified, with Eukrohnia hamata being the most abundant, particularly at 300m. Two species of Euphausiacea were found, Euphausia superba and Thysanoesa macrura, with low abundances. Abiotic parameters showed significant relationships with the taxa. The region exhibits complex oceanography associated with zooplankton communities. The recorded data align with the zooplankton characterization of this region, uncovering a prevalence of Copepoda and surface abundant Salpidae, along with Chaetognatha (particulary E. hamata) and Euphausiacea.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 suppl 2","pages":"e20240144"},"PeriodicalIF":1.1,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142852160","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

First report of Penicillium brevicompactum causing disease in Pleurotus ostreatus. 短孔青霉菌引起平菇疾病的首次报道。

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: 10.1590/0001-3765202420210103

Ricardo Scheffer DE Andrade Silva, Tiago Miguel Jarek, Gabriel Lucas DE Jesus, Gabriel Dias DE Oliveira, Francine Lorena Cuquel

引用次数: 0

Gas Chromatography-mass Spectrometry analysis, Biotoxicity and Antibiofilm Activities of Syzygium aromaticum against Corynebacterium diphtheriae. 香合子对白喉棒状杆菌的气相色谱-质谱分析、生物毒性及抗菌活性。

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: 10.1590/0001-3765202420230368

Marcia B Alves, Katyane S Nascimento, Jéssica Mayara M Araújo, Wellyson C A Firmo, Victor Elias Mouchrek Filho, Dionney A DE Sousa, Ana Luíza M Guaraldi, Lídio G Lima Neto, Priscila S Sabbadini

{"title":"Gas Chromatography-mass Spectrometry analysis, Biotoxicity and Antibiofilm Activities of Syzygium aromaticum against Corynebacterium diphtheriae.","authors":"Marcia B Alves, Katyane S Nascimento, Jéssica Mayara M Araújo, Wellyson C A Firmo, Victor Elias Mouchrek Filho, Dionney A DE Sousa, Ana Luíza M Guaraldi, Lídio G Lima Neto, Priscila S Sabbadini","doi":"10.1590/0001-3765202420230368","DOIUrl":"https://doi.org/10.1590/0001-3765202420230368","url":null,"abstract":"The objective of this study was to investigate the chemical composition of Syzygium aromaticum essential oil (SAEO), both as its toxicity and biological activities on Corynebacterium diphtheriae. The essential oil (EO) was obtained by hydrodistillation and verified by GC-MS. The main chemical components were eugenol (48.79%), caryophyllene (44.29%) and α-humulene (4.87%). In vitro tests with human red blood cells, blood compatibility. SAEO showed high toxicity for Artemia salina and the bioassay on Tenebrio molitor larvae revealed an average survival rate of 80.00%. The antioxidant activity of SAEO was moderate (40.60%) using the phosphomolybdenum method. SAEO inhibited the growth of all C. diphtheriae strains tested at minimum inhibitory concentrations of 62.5-1000 µg mL-1 (strong to moderate). The minimum bactericidal concentration of SAEO was observed in two strains. Microorganisms cultivated in the presence of subinhibitory concentrations (subMIC) do not show morphological changes. The subMIC of SAEO inhibited in some strains, but in most cases, increased biofilm formation. In conclusion, the results of this study found that SAEO has an inhibitory effect against C. diphtheriae, representing an alternative antimicrobial therapy, although more in vivo biological studies, alone or in combination with occasional antimicrobials, should be carried out to better evaluate its effects.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 suppl 3","pages":"e20230368"},"PeriodicalIF":1.1,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142852206","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