Anais da Academia Brasileira de Ciencias最新文献

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Influence of pollination mechanisms on the physical-chemical quality of strawberry (Fragaria x ananassa) cv. San Andreas. 传粉机制对草莓理化品质的影响圣安德烈亚斯。
IF 1.1 4区 综合性期刊
Anais da Academia Brasileira de Ciencias Pub Date : 2025-07-14 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520240799
Priscila S Miranda, Zilda Cristina M Lima, Raquel Pérez-Maluf, Elismar P DE Oliveira, Paulo Henrique M Monroe, Aldenise A Moreira
{"title":"Influence of pollination mechanisms on the physical-chemical quality of strawberry (Fragaria x ananassa) cv. San Andreas.","authors":"Priscila S Miranda, Zilda Cristina M Lima, Raquel Pérez-Maluf, Elismar P DE Oliveira, Paulo Henrique M Monroe, Aldenise A Moreira","doi":"10.1590/0001-3765202520240799","DOIUrl":"https://doi.org/10.1590/0001-3765202520240799","url":null,"abstract":"<p><p>The objective of this study was to evaluate the physical-chemical quality parameters of strawberry fruits, cultivar San Andreas, depending on different pollination mechanisms. The study was conducted in the municipality of Barra do Choça - BA, organized into five treatments, with four replications: T1- Natural pollination (NP), T2- Natural pollination with a density of bees (NPDB), T3- Manual cross-pollination (MCP), T4- Pollination by anemophily (PA) and T5- Self-pollination (SP). For the pollination treatment with a density of bees, four hives of Iraí (<italic>Nannotrigona testaceicornis</italic>) and four hives of Jataí (<italic>Tetragonisca angustula</italic>) were placed near the strawberry plantation. After pollination of all treatments, the flowers were bagged until the development and maturation of the floral receptacle. The fruits were harvested, quantified, and subjected to evaluations to determine physical and chemical parameters. Pollination with a density of bees and natural pollination provided fruits with higher average weight, diameter, and length. Natural pollination, natural pollination with density of bees, manual cross-pollination, and anemophily pollination showed greater chromaticity in the fruits. Natural pollination and density of bees provided the best parameters (Weight, °Brix, ratio, and vit. C). Self-pollination presented the lowest averages in most of the variables analyzed.</p>","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97 3","pages":"e20240799"},"PeriodicalIF":1.1,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144641541","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
Toxicity of Citrus sinensis essential oil on Lutzomyia longipalpis (Diptera: Psychodidae), vector of visceral leishmaniasis in Brazil. 柑桔精油对巴西内脏利什曼病病媒长掌Lutzomyia longipalpis的毒性研究。
IF 1.1 4区 综合性期刊
Anais da Academia Brasileira de Ciencias Pub Date : 2025-07-14 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520240051
Fernanda Batista-Santos, Sâmia Francielle Silva, Thiago Santos, Débora M Lima, Raquel Maria F Sousa, Ricardo A Barata
{"title":"Toxicity of Citrus sinensis essential oil on Lutzomyia longipalpis (Diptera: Psychodidae), vector of visceral leishmaniasis in Brazil.","authors":"Fernanda Batista-Santos, Sâmia Francielle Silva, Thiago Santos, Débora M Lima, Raquel Maria F Sousa, Ricardo A Barata","doi":"10.1590/0001-3765202520240051","DOIUrl":"https://doi.org/10.1590/0001-3765202520240051","url":null,"abstract":"<p><p>Essential oils (OEs) have emerged as an increasingly promising alternative for vector control to replace synthetic insecticides. This work aimed to evaluate the toxicity of essential oil from <italic>Citrus sinensis </italic>(pear orange) peels on sand flies of the species <italic>Lutzomyia longipalpis</italic>. The insects were exposed to different concentrations of the essential oil (100, 200, and 400 mg mL-1), and the survival rate after exposure was evaluated. The chemical characterization of the essential oil was carried out using gas chromatography coupled with mass spectrometry. The results showed that the essential oil from <italic>C. sinensis </italic>peels was toxic to sand flies at all concentrations evaluated, with a reduction in the survival rate with increasing concentration. Nine compounds were identified in the essential oil of <italic>C. sinensis</italic>, with <italic>d</italic>-limonene having the highest percentage of relative peak area of the total ion chromatogram. Further studies are needed to support the development of an efficient product that helps control these vectors.</p>","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97 3","pages":"e20240051"},"PeriodicalIF":1.1,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144641550","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
On a von Mises-type circular distribution. 在von mises型圆形分布上。
IF 1.1 4区 综合性期刊
Anais da Academia Brasileira de Ciencias Pub Date : 2025-07-14 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520240869
Fredy Castellares, Artur J Lemonte
{"title":"On a von Mises-type circular distribution.","authors":"Fredy Castellares, Artur J Lemonte","doi":"10.1590/0001-3765202520240869","DOIUrl":"10.1590/0001-3765202520240869","url":null,"abstract":"<p><p>We introduce a two-parameter circular family of distributions based on the traditional von Mises distribution. A comprehensive account of the general properties of the new circular distribution is provided. Maximum likelihood estimation of the model parameters is discussed, and we provide a simple method to find the maximum likelihood estimates numerically. We also derive the expected Fisher information matrix for the model parameters. An empirical application to a real data set is considered to illustrate the new circular distribution in practice.</p>","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97 3","pages":"e20240869"},"PeriodicalIF":1.1,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144641545","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
Bat assemblage and its frugivorous diet in a Eucalyptus plantation. 桉树人工林中的蝙蝠种群及其果食性饮食。
IF 1.1 4区 综合性期刊
Anais da Academia Brasileira de Ciencias Pub Date : 2025-07-14 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520241169
Fábio André F Jacomassa, Vanessa F C Bortolotti, Pedro Henrique Miguel, Marco Aurélio Pizo
{"title":"Bat assemblage and its frugivorous diet in a Eucalyptus plantation.","authors":"Fábio André F Jacomassa, Vanessa F C Bortolotti, Pedro Henrique Miguel, Marco Aurélio Pizo","doi":"10.1590/0001-3765202520241169","DOIUrl":"https://doi.org/10.1590/0001-3765202520241169","url":null,"abstract":"<p><p>Habitat loss and fragmentation have enormous impacts on biodiversity and tree plantations can help alleviate these impacts. We study bat assemblage, as well as the diet of frugivorous bats in a managed <italic>Eucalyptus</italic> plantation of sustainable use in Rio Claro, São Paulo state, Brazil. We captured 86 bats of nine species, where five species of them ate 17 plant species, mostly pioneers (93.7%). Three species were most dominant, frequent and important in seed dispersal: seba's short-tailed bat (<italic>Carollia perspicillata</italic>), great fruit-eating bat (<italic>Artibeus lituratus</italic>), and little yellow-shouldered bat (<italic>Sturnira lilium</italic>). These species are the most abundant and main seed dispersers in Brazil. Compared to literature data from other <italic>Eucalyptus</italic> plantations, we concluded that our studied <italic>Eucalyptus</italic> area with understory and emerging regenerating native species provided greater diversity than in areas where <italic>Eucalyptus</italic> is used commercially and the understory vegetation is constantly altered; the fruits exploited by these three bat species demonstrates their ability to adapt to food availability and coexist with other species; <italic>Eucalyptus</italic> forests cannot be considered as biological deserts if they are not managed so intensively as in commercial plantations.</p>","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97 3","pages":"e20241169"},"PeriodicalIF":1.1,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144641514","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
Green Extraction of Antioxidant Polyphenols from Strawberry Tree (Arbutus unedo L. ) Fruits and Leaves: Application of Deep Eutectic Solvents in the Ultrasound-Assisted Extraction. 草莓树抗氧化多酚的绿色提取水果和叶子:深共晶溶剂在超声辅助提取中的应用。
IF 1.1 4区 综合性期刊
Anais da Academia Brasileira de Ciencias Pub Date : 2025-07-14 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520241084
Özge Algan-Cavuldak
{"title":"Green Extraction of Antioxidant Polyphenols from Strawberry Tree (Arbutus unedo L. ) Fruits and Leaves: Application of Deep Eutectic Solvents in the Ultrasound-Assisted Extraction.","authors":"Özge Algan-Cavuldak","doi":"10.1590/0001-3765202520241084","DOIUrl":"https://doi.org/10.1590/0001-3765202520241084","url":null,"abstract":"<p><p>Deep eutectic solvents combined with ultrasound assisted extraction (DES-UAE) was successfully performed to extract polyphenols from strawberry tree (<italic>Arbutus unedo</italic>). Choline chloride (ChCl)-glycerol and ChCl-lactic acid were chosen as the most effective DESs for <italic>A.unedo</italic> leaves and fruits, respectively. DES-UAE parameters (DES molar ratio, solvent:solid ratio, extraction temperature, extraction time) impacting the total phenolic content (TPC), total flavonoid content (TFC), total antioxidant activity (TAA) results of both fruit and leaf extracts were investigated at different conditions. The optimal conditions for leaf sample were determined as 1:2 ChCl:Glycerol, 30:1 ml/g solvent:solid ratio, 50 min time, and 60 °C temperature, whereas for fruit sample they were 1:2 ChCl:Lactic acid, 30:1 ml/g, 40 min and 50 °C, respectively. Under these conditions, leaf extracts contained TPC (46.94±0.13 mg GAE/g), TFC (20.14±0.46 mg CAT/g), DPPH (75.13±1.96%), ABTS (0.520±0.003 mmol TR/g) and FRAP (0.231±0.000 mmolTR/g) while fruit extracts contained TPC (10.17±0.18 mg GAE/g), TFC (2.30±0.05 mg CAT/g), DPPH (84.19±1.49%), ABTS (0.128±0.002mmolTR/g) and FRAP (0.033±0.001mmolTR/g) results. Further research into the optimization of parameters of DES-UAE for the extraction of polyphenols from <italic>A. unedo</italic> fruits and leaves may enable scalable applications in the food, pharmaceutical and cosmetic industries where the demand for efficient and sustainable methods is increasing.</p>","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97 3","pages":"e20241084"},"PeriodicalIF":1.1,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144641540","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
What are the future directions for microplastics characterization? A regex-llama data mining approach for identifying emerging trends. 微塑料表征的未来方向是什么?用于识别新兴趋势的正则表达式数据挖掘方法。
IF 1.1 4区 综合性期刊
Anais da Academia Brasileira de Ciencias Pub Date : 2025-07-11 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520241345
Fernando Gomes, Shekhar Bhansali, Fabíola Maranhão, Viviane Valladão, Karine Velasco
{"title":"What are the future directions for microplastics characterization? A regex-llama data mining approach for identifying emerging trends.","authors":"Fernando Gomes, Shekhar Bhansali, Fabíola Maranhão, Viviane Valladão, Karine Velasco","doi":"10.1590/0001-3765202520241345","DOIUrl":"https://doi.org/10.1590/0001-3765202520241345","url":null,"abstract":"<p><p>This study introduces a hybrid method to identify and analyze techniques for microplastic analysis. We improve the detection and understanding of both established and new techniques by integrating regex-based pattern detection with the Llama 3.2:3b language model. Techniques like Raman and FTIR spectroscopy are explored alongside advanced tools, such as X-ray Photoelectron Spectroscopy (XPS) and Surface-Enhanced Raman Spectroscopy (SERS). This combination enhances the accuracy and speed of identifying complex terminology related to microplastics research. Data analysis and visualization were conducted using VOSDataAnalyzer and VOSviewer, allowing us to map connections and trends within a network of related terms. This analysis identified the 15 most commonly used and emerging techniques, showing a shift toward more sensitive and innovative methods in microplastic studies. This novel Regex-Llama approach, introduced here for the first time, provides a scalable methodology applicable to various searches, including the analysis of pollutants in environmental science, the evaluation of material degradation in materials engineering, and the assessment of the toxicological effects of micro-contaminants on public health. This strategy facilitates environmental evaluations and aids in formulating pollution reduction measures, addressing many difficulties across several interesting fields.</p>","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97Suppl. 3 Suppl. 3","pages":"e20241345"},"PeriodicalIF":1.1,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144641572","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
Perspectives on the impact of microplastics (MPs) on fish of the Amazon that exhibit air-breathing and aquatic surface respiration. 关于微塑料(MPs)对亚马逊河中表现出空气呼吸和水生表面呼吸的鱼类影响的观点。
IF 1.1 4区 综合性期刊
Anais da Academia Brasileira de Ciencias Pub Date : 2025-07-11 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520250254
Lauren Zink, Adalberto L Val, Chris M Wood
{"title":"Perspectives on the impact of microplastics (MPs) on fish of the Amazon that exhibit air-breathing and aquatic surface respiration.","authors":"Lauren Zink, Adalberto L Val, Chris M Wood","doi":"10.1590/0001-3765202520250254","DOIUrl":"10.1590/0001-3765202520250254","url":null,"abstract":"<p><p>Fish in the Amazon basin have adapted to bouts of low water O2 and high CO2, with many species evolving air-breathing or aquatic surface respiration mechanisms to supplement respiratory gas exchange. While concurrently coping with greater instances of hypoxic and hypercarbic stress, fish in the Amazon are also facing microplastic pollution. Assessments of the Amazon basin reveal some of the highest microplastic concentrations globally. In this article, we highlight instances in which the evolution of air-breathing and aquatic surface respiration may make fish of the Amazon particularly susceptible to the effects of microplastic pollution. We consider these effects as they relate to gill morphology, specialized air-breathing organs, ion transport processes, aquatic surface respiration, and oxidative stress. Finally, we relate our perspectives with the recently published Executive Summary of the Status of Water Quality in the Amazon Basin to highlight the importance of considering microplastics alongside other pollutants threatening the ecological, economical, and cultural values of the Amazon.</p>","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97Suppl. 3 Suppl. 3","pages":"e20250254"},"PeriodicalIF":1.1,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144641571","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
Temperature Drives Microbial Dynamics during the ripening of Serrano Artisanal Cheese. Serrano手工奶酪成熟过程中温度对微生物动态的影响。
IF 1.1 4区 综合性期刊
Anais da Academia Brasileira de Ciencias Pub Date : 2025-07-11 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520240169
Jeferson Aloísio Ströher, Anderson S DE Freitas, Caroline Isabel Kothe, Voltaire Sant'anna, Marcela M Salazar, Rosiele L Padilha
{"title":"Temperature Drives Microbial Dynamics during the ripening of Serrano Artisanal Cheese.","authors":"Jeferson Aloísio Ströher, Anderson S DE Freitas, Caroline Isabel Kothe, Voltaire Sant'anna, Marcela M Salazar, Rosiele L Padilha","doi":"10.1590/0001-3765202520240169","DOIUrl":"https://doi.org/10.1590/0001-3765202520240169","url":null,"abstract":"<p><p>This study investigated the impact of ripening temperature on the microbial diversity of Serrano artisanal cheese (SAC), a raw milk specialty from southern Brazil. Despite its cultural and economic significance, the effects of ripening conditions on SAC microbiota remain underexplored, particularly in unpasteurized dairy products. Cheese maturation was conducted at 5°C, 12.5°C, and 20°C for 60 days, with microbial assessments every 15 days using metabarcoding (16S rDNA and ITS sequencing). The results revealed temperature-dependent shifts in bacterial and fungal communities. Maturation at 5°C favored the proliferation of pathogens associated with raw milk contamination, while higher temperatures reduced pathogenic bacteria and promoted lactic acid bacteria (LAB) (<italic>Enterococcus</italic>, <italic>Lactococcus</italic>, <italic>Lactobacillus</italic>, <italic>Leuconostoc</italic>, and <italic>Streptococcus</italic>), which contribute to pathogen inhibition and sensory quality preservation. Physicochemical analyses demonstrated correlations between temperature, humidity, pH, fat, NaCl, and microbial composition. A review of ripening criteria is recommended, including a reduction in the minimum legally required maturation period (from 60 to 30 days) under controlled temperature conditions, as demonstrated in this study, alongside the implementation of technical regulations and knowledge dissemination to ensure product quality and safety.</p>","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97 3","pages":"e20240169"},"PeriodicalIF":1.1,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144641548","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
Occurrence of microplastics in the gastrointestinal tract of Amazonian fish species with different feeding habits. 不同摄食习性的亚马逊鱼类胃肠道中微塑料的发生。
IF 1.1 4区 综合性期刊
Anais da Academia Brasileira de Ciencias Pub Date : 2025-07-04 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520241204
Maria Tereza V DE Souza, Grazyelle S DA Silva, Igor A Pinto, Lizandro Manzato, Adalberto Luis Val
{"title":"Occurrence of microplastics in the gastrointestinal tract of Amazonian fish species with different feeding habits.","authors":"Maria Tereza V DE Souza, Grazyelle S DA Silva, Igor A Pinto, Lizandro Manzato, Adalberto Luis Val","doi":"10.1590/0001-3765202520241204","DOIUrl":"https://doi.org/10.1590/0001-3765202520241204","url":null,"abstract":"<p><p>Plastic pollution has become commonplace and knowledge about microplastics is limited in relation to their real threat to the aquatic biota present in the Amazon basin. Through fish species collected in Lake Janauacá and the Anavilhanas Archipelago, in the state of Amazonas, Brazil, we investigated the ingestion of microplastics by Amazonian fish species with different eating habits. The fish were dissected, and the gastrointestinal tract underwent alkaline digestion for the separation of the microplastic particles. Using a stereomicroscope, the items characterized as microplastics were subjected to Fourier-transform infrared spectroscopy. Almost >60% of the analyzed fish species contained microplastics in their gastrointestinal tracts. Most of the microplastics were found in the intestine (91.5%) and the rest (8.5%) in the stomach. There were no significant differences in the feeding habits of the studied species, or between the locations. The characterization of microplastics highlights the possible sources of the microplastics such as discarded fishing artifacts, the lack of basic sanitation evident in the region and the lack of environmental education for tourists. This study provides data that can assist in the development and formation of practices that combat plastic pollution and raises awareness in regard to the correct disposal of plastics.</p>","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97Suppl 3 Suppl 3","pages":"e20241204"},"PeriodicalIF":1.1,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144607195","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
Correlating particle size distribution and thermal decomposition of intensely ground limestone and dolostone with microstructure and structural changes. 强磨灰岩和白云岩粒度分布和热分解与微观结构变化的关系
IF 1.1 4区 综合性期刊
Anais da Academia Brasileira de Ciencias Pub Date : 2025-06-30 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520240970
Filipe B Marinho DE Barros, Ulysses P DE Holanda Pereira, Maria Júlia S Luis, Pedro L Guzzo
{"title":"Correlating particle size distribution and thermal decomposition of intensely ground limestone and dolostone with microstructure and structural changes.","authors":"Filipe B Marinho DE Barros, Ulysses P DE Holanda Pereira, Maria Júlia S Luis, Pedro L Guzzo","doi":"10.1590/0001-3765202520240970","DOIUrl":"https://doi.org/10.1590/0001-3765202520240970","url":null,"abstract":"<p><p>An extensive investigation in limestone and dolostone ground in a planetary ball mill was achieved bearing in mind the different paths often observed in particle size reduction and agglomeration between these rocks and their increasing use in ultrafine size ranges for eco-friendly engineering applications. Two samples ground (dry) in a planetary ball mill up to 32 h were examined using laser scattering, physisorption, electron microscopy, X-ray diffraction, infrared spectroscopy and thermal analysis. Static hardness and crystal grain sizes were measured in parent rock specimens. For limestone, the apparent grinding limit (12 µm) was reached after 1 h, and no changes were observed in lattice strain, crystallite size and infrared bands related to CO32- vibration modes. For dolostone, these properties changed significantly when the grinding limit (6 µm) was achieved (8 h). Calcite-aragonite transformation was mostly observed in intensely ground dolostone. The activation energy for thermal decomposition of calcite and dolomite was correlated with lattice strain and particle agglomeration. The lower grinding rate noticed for dolostone was attributed to its refined grain size. Distinct energy dissipation mechanisms were portrayed once the grinding limit was reached: agglomeration and deagglomeration cycles in limestone; plastic deformation and growth of strong agglomerates in dolostone.</p>","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97 3","pages":"e20240970"},"PeriodicalIF":1.1,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144558837","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
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