Anais da Academia Brasileira de Ciencias最新文献_第9页

Vegetation patterns of Brazilian rocky savannas, with emphasis on limestone cerrado. 植被模式的巴西岩石稀树草原，重点是石灰石塞拉多。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-12-15 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520240312

Marcelo Henrique O Pinheiro, Bruna T Castellan, Ana Victoria M Barbosa, Calebe S Dutra, Henrique A DE Oliveira, Felipe F Naves, Rafael Arruda, Wagner Luiz Dos Santos, Renata G Udulutsch

{"title":"Vegetation patterns of Brazilian rocky savannas, with emphasis on limestone cerrado.","authors":"Marcelo Henrique O Pinheiro, Bruna T Castellan, Ana Victoria M Barbosa, Calebe S Dutra, Henrique A DE Oliveira, Felipe F Naves, Rafael Arruda, Wagner Luiz Dos Santos, Renata G Udulutsch","doi":"10.1590/0001-3765202520240312","DOIUrl":"https://doi.org/10.1590/0001-3765202520240312","url":null,"abstract":"Floristic studies were conducted in three rocky cerrados, two limestone (designated as A1 and B) and one arenitic (A2), in the Pontal do Triângulo Mineiro region. We aimed to identify floristic patterns of their shrub-tree components that could contribute to the characterization of these rocky cerrados, especially the limestone ones. We surveyed 20 plots (10 m x 10 m) in areas A1 and A2, and 85 quadrants in B. To understand the species' contributions in terms of habitat occurrence, we classified then as generalists (G), savanna-associated (S), or forest-associated (F), and identified those occurring in rocky environments. We studied species richness through rarefaction curves and performed floristic similarity analyses using UPGMA (Jaccard index - between A1 and A2) and NMDS (Horn index - among the three rocky cerrados, 15 savanna areas, and eight deciduous forest areas). We observed a lower occurrence of strict savanna or forest species and rocky environments in all three studied areas, confirming findings from other authors. Despite a higher similarity with savanna formations, floristic differences recorded locally (UPGMA) and regionally (NMDS) supported the hypothesis that limestone cerrados may exhibit floristic patterns distinguishing them from other rocky cerrados.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97Suppl. 4 Suppl. 4","pages":"e20240312"},"PeriodicalIF":1.1,"publicationDate":"2025-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145793083","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

Scientific collections - quo vadis?

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-12-15 DOI: 10.1590/0001-3765202520259704

Alexander W A Kellner

引用次数: 0

Antimicrobial activity and resistance to UV-light by pigmented soil bacteria from Whalers Bay, Deception Island, Maritime Antarctica. 南极海洋捕鲸湾、欺骗岛色素土壤细菌的抗菌活性及对紫外线的抗性。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-12-15 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520250385

Thaynara Cristina DE Carvalho, Luiz Henrique Rosa, Alysson Wagner F Duarte, Michel Rodrigo Z Passarini

{"title":"Antimicrobial activity and resistance to UV-light by pigmented soil bacteria from Whalers Bay, Deception Island, Maritime Antarctica.","authors":"Thaynara Cristina DE Carvalho, Luiz Henrique Rosa, Alysson Wagner F Duarte, Michel Rodrigo Z Passarini","doi":"10.1590/0001-3765202520250385","DOIUrl":"https://doi.org/10.1590/0001-3765202520250385","url":null,"abstract":"Microorganisms from the Antarctic continent have attracted attention due to their ability to produce bioactive secondary metabolites at low temperatures. The search for pigmented compounds produced by microbial strains from cold environments has been investigated due to their applications in the cosmetics and pharmaceutical industries. This study evaluated the resistance to UV-C (254 nm) light and antimicrobial activity of pigments produced by soil bacteria from Deception Island, Antarctica. Ten pigmented bacteria were isolated and subjected to an assay for resistance to ultraviolet (UV) radiation. All strains showed resistance. However, six, five, and five strains were able to survive after 10, 15, and 30 minutes of light exposure. UV-resistant strains UVBACD.10 and Brachybacterium paraconglomeratum UVBACD.5 were selected for the minimum inhibitory concentration (MIC) assay against pathogenic bacteria. UVBACD.5 showed inhibitory effects on the pathogenic bacteria tested at different concentration levels, assayed in triplicate. The best antimicrobial activity reached a MIC of 0.021 mg mL-1 against Escherichia coli. Soil from Whalers Bay can be considered a source of microorganisms of industrial biotechnological interest. The results of this work encourage studies on the characterization and purification of secondary metabolites produced by isolates from the Antarctic continent for future applications in the pharmaceutical and cosmetic areas.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97Suppl. 4 Suppl. 4","pages":"e20250385"},"PeriodicalIF":1.1,"publicationDate":"2025-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145792962","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

Growth, first maturation and reproduction of Colossoma macropomum (Cuvier, 1818) under controlled conditions. 巨形巨像（Colossoma macropomum, Cuvier, 1818）在受控条件下的生长、首次成熟和繁殖。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-12-15 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520250086

Gustavo S DA Costa Júlio, Fabio Aremil C Dos Santos, André S Souza, Nilo Bazzoli, Nathalia S Ferreira, Pedro Paulo C Pedras, Glauber David A Palheta, Walisson S E Silva, Ronald Kennedy Luz

{"title":"Growth, first maturation and reproduction of Colossoma macropomum (Cuvier, 1818) under controlled conditions.","authors":"Gustavo S DA Costa Júlio, Fabio Aremil C Dos Santos, André S Souza, Nilo Bazzoli, Nathalia S Ferreira, Pedro Paulo C Pedras, Glauber David A Palheta, Walisson S E Silva, Ronald Kennedy Luz","doi":"10.1590/0001-3765202520250086","DOIUrl":"https://doi.org/10.1590/0001-3765202520250086","url":null,"abstract":"This study assessed the growth, gonadal development, first maturation, sperm quality, and first reproduction of Colossoma macropomum raised under controlled conditions. The animals were maintained under consistent conditions. The mean weights reached after the first, second, and third years were 0.94 kg (0.50-1.42 kg), 3.78 kg (3.02-5.19 kg), and 5.66 kg (3.88-8.17 kg), respectively. The highest biomass was 14.1 kg/m³ at 890 days after hatching (DAH), while at the end of the study it was 5.6 kg/m³. Feed conversion remained below 2.0. No differences in weight or length were observed between males and females of the same age. Of the three males analyzed at 590 DAH, one was at rest and two were in initial maturation. Advanced male maturation was first recorded at 710 DAH. Six females showed initial maturation at 710 DAH, while advanced female maturation was first recorded at 890 DAH. Data on VFI, HSI, and GSI throughout development are presented. Sperm quality parameters did not differ between males at 890 and those at 990 DAH. Two out of four induced females spawned. This study is the first to provide evidence suggesting that the life cycle of C. macropomum can be completed in RAS.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97Suppl. 4 Suppl. 4","pages":"e20250086"},"PeriodicalIF":1.1,"publicationDate":"2025-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145792959","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

Pterosaurs and the legacy of flight in deep time. 翼龙和远古时期的飞行遗产。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-12-15 DOI: 10.1590/0001-3765202520251213

Juliana Manso Sayão, Taissa Rodrigues, Shunxing Jiang

引用次数: 0

Coupled Numerical Simulation of CO2 - EOR Flooding: Integrating Multiphysics Interactions. CO2 - EOR驱油耦合数值模拟：整合多物理场相互作用。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-12-15 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520250229

Jiaqi Xiao, Benyi Guo, Peisheng Wang, Qiangqiang Sun, Qicai Wang, Xia Zhang, Ziwen Geng, Meixiang Gao

{"title":"Coupled Numerical Simulation of CO2 - EOR Flooding: Integrating Multiphysics Interactions.","authors":"Jiaqi Xiao, Benyi Guo, Peisheng Wang, Qiangqiang Sun, Qicai Wang, Xia Zhang, Ziwen Geng, Meixiang Gao","doi":"10.1590/0001-3765202520250229","DOIUrl":"https://doi.org/10.1590/0001-3765202520250229","url":null,"abstract":"Numerical simulation of CO2-enhanced oil recovery (CO2-EOR) critically advances hydrocarbon field development by quantifying multiphase saturation dynamics during CO2-driven displacement. This study establishes a cylindrically configured 1D triple-phase mathematical model integrating Darcy's law and mass conservation principles, employing an implicit pressure-explicit saturation (IMPES) finite-difference scheme to resolve spatiotemporal evolution of aqueous, oleic, and gaseous phase saturations. Systematic incorporation of chemical reaction kinetics, viscosity-pressure coupling, and dynamic relative permeability effects yields a novel computational framework for immiscible displacement analysis. Simulations reveal two governing mechanisms: 1) CO2-saturated fluid/rock interactions induce pore-throat dilation, amplifying effective flooding radii; 2) Wellbore-formation pressure differentials (ΔP) dictate CO2 plume propagation, where elevated ΔP expands repulsion radii and oil displacement annulus thickness. Paradoxically, increased reservoir porosity reduces annular confinement while diminishing displacement efficiency despite enhanced volumetric throughput, with simulations confirming persistent oil-rich annuli characteristic of non-miscible regimes. These findings provide actionable guidelines for optimizing CO2-EOR injectivity parameters and ensuring long-term carbon sequestration integrity in heterogeneous formations, bridging theoretical modeling with field-scale implementation strategies.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97 4","pages":"e20250229"},"PeriodicalIF":1.1,"publicationDate":"2025-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145792911","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

A special issue on pterosaurs - the first vertebrates to develop active flight. 一期关于翼龙的特刊，翼龙是最早发展出主动飞行的脊椎动物。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-12-15 DOI: 10.1590/0001-37652025202597s1

Alexander W A Kellner

引用次数: 0

Optimization of the conditions for obtaining fermentable sugars from corn residues produced in the far north of the Amazon. 从亚马逊远北地区生产的玉米渣中获得可发酵糖的条件优化。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-12-15 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520240640

Joselma P DA Silva, Ana Paula F Correa, Leovergildo R Farias, Francisco S Panero, Pedro Aurélio C L Pequeno, Marcos José S Vital

{"title":"Optimization of the conditions for obtaining fermentable sugars from corn residues produced in the far north of the Amazon.","authors":"Joselma P DA Silva, Ana Paula F Correa, Leovergildo R Farias, Francisco S Panero, Pedro Aurélio C L Pequeno, Marcos José S Vital","doi":"10.1590/0001-3765202520240640","DOIUrl":"https://doi.org/10.1590/0001-3765202520240640","url":null,"abstract":"Faced with the increase in the demand for energy and the scarcity of certain natural resources, finding ways to avoid environmental imbalances has become an important focus in research. In Roraima, corn production is increasing and its processing generates tons of husks and cobs, and these residues are rich in xylose and glucose. In this context, lignocellulosic biomass is presented as a sustainable proposal for producing fermentable sugars. This residues and analyze the conditions used in the acid and enzymatic hydrolysis process. The residues were pretreated, and the fermentable sugars were quantified using dinitrosalicylic acid, and then identified with near-infrared spectroscopy. In the enzymatic process, the sugar concentration obtained was 72.08 g L-1 for the husks and 69.94 g L-1 for the cobs. In the acid hydrolysis, 18.18 g L-1 was obtained for the husks and 19.20 g L-1 for the cobs, with xylose and glucose identified as the main sugars. These results suggest that these residues can serve as sustainable alternatives for producing fermentable sugars in the northern region of Brazil, given the growth in corn plantations. This sustainable approach aligns with efforts to address energy demands while mitigating environmental impacts.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97Suppl. 4 Suppl. 4","pages":"e20240640"},"PeriodicalIF":1.1,"publicationDate":"2025-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145792983","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

Scientific collections at risk: political threats to Latin America's biological memory. 面临风险的科学收藏：对拉丁美洲生物记忆的政治威胁。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-12-12 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520250925

Martín R Alvarez

引用次数: 0

Detection of the babA2 adhesin gene in Helicobacter pylori clinical isolates and correlation with upper gastrointestinal diseases. 幽门螺杆菌临床分离株babA2粘附素基因的检测及其与上消化道疾病的相关性

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-12-12 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520241464

Diogo Nery Maciel, Silvana B Santiago, Viviane L Rocha, Gabriela L Dos Santos, Lucas T Rasmussen, Mônica S Barbosa

{"title":"Detection of the babA2 adhesin gene in Helicobacter pylori clinical isolates and correlation with upper gastrointestinal diseases.","authors":"Diogo Nery Maciel, Silvana B Santiago, Viviane L Rocha, Gabriela L Dos Santos, Lucas T Rasmussen, Mônica S Barbosa","doi":"10.1590/0001-3765202520241464","DOIUrl":"https://doi.org/10.1590/0001-3765202520241464","url":null,"abstract":"Helicobacter pylori is an oncobacteria that infects more than half of the world's population. Adhesins are virulence factors that are essential for the microorganism to bind to the gastric mucosa, such as the BabA adhesion protein, which is associated with the clinical outcome of the infection. The aim of this study was to evaluate the association of the babA2 gene of H. pylori with clinical outcomes and lifestyle of dyspeptic patients in central Brazil. Molecular diagnosis of H. pylori and screening of the babA2 gene were performed in 155 patients by polymerase chain reaction. Gastropathies were classified as mild and severe. Approximately 68% (105/155) of the patients were infected with H. pylori, and of these, 25% had babA2+ strains. The presence of babA2 was more frequent in women and in patients who consumed coffee daily. However, there was no statistical association between babA2 and these variables. Approximately 31% of patients infected with babA2+ strains presented some severe disease, with gastric adenocarcinoma being the most frequent severe gastropathy. The babA2 genotype of H. pylori was not associated with the severity of gastropathies (p=0.128). The characterization of molecular markers may contribute to the identification of virulent strains with relevance to public health.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97 suppl. 4","pages":"e20241464"},"PeriodicalIF":1.1,"publicationDate":"2025-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145792987","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