Anais da Academia Brasileira de Ciencias最新文献

Isolation of lactic acid bacteria and quantification of Lentilactobacillus buchneri using qPCR in sorghum silage inoculated with native strains in tropical conditions.

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-03-31 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520240783

João Paulo S Roseira, Odilon G Pereira, Tâmara C DA Silveira, Ricardo M A Pinho, Renan S Cascardo, Rosinea A DE Paula, Poliane A Zerbini, Hilário C Mantovani, Wagner S Alves, Karina G Ribeiro

{"title":"Isolation of lactic acid bacteria and quantification of Lentilactobacillus buchneri using qPCR in sorghum silage inoculated with native strains in tropical conditions.","authors":"João Paulo S Roseira, Odilon G Pereira, Tâmara C DA Silveira, Ricardo M A Pinho, Renan S Cascardo, Rosinea A DE Paula, Poliane A Zerbini, Hilário C Mantovani, Wagner S Alves, Karina G Ribeiro","doi":"10.1590/0001-3765202520240783","DOIUrl":"https://doi.org/10.1590/0001-3765202520240783","url":null,"abstract":"The objective of this study was to isolate lactic bacteria, quantify the population of Lentilactobacillus buchneri by qPCR, and evaluate the effects of the inoculation of native strains of L. buchneri in sorghum silage. The treatments were arranged in a 4 × 5 factorial scheme, with four inoculants (I) and five fermentation periods (P) (7, 14, 28, 45, and 90), in a completely randomized design, with three replicates. Forty-seven LAB strains were isolated from control silage, and L. buchneri was the predominant species at 45 and 90 days of fermentation. The qPCR data showed that L. buchneri predominated during all fermentation periods in the inoculated silages. There was an effect (P<0.05) of I × P interaction on all studied variables of the fermentative profile and microbial population. There was an effect (P<0.05) of I × P interaction on the dry matter (DM), neutral detergent fiber (NDF), in vitro DM digestibility, and in vitro NDF digestibility. Inoculation with L. buchneri resulted in silages with better fermentative quality and digestibility and a lower yeast population. The native LB.1 and LB.4 strains have potential to be used as inoculants in sorghum silage production, with effects on fermentation quality at 45 days of storage.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97 1","pages":"e20240783"},"PeriodicalIF":1.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143762818","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

Reproductive biology of Psomophis genimaculatus (Boettger 1885) (Serpentes: Dipsadidae) from Brazil.

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-03-31 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520240469

Kelvin Y Mori, Cecília M Ferracini, Liliana Piatti, Hugo Cabral, Vanda Lúcia Ferreira

{"title":"Reproductive biology of Psomophis genimaculatus (Boettger 1885) (Serpentes: Dipsadidae) from Brazil.","authors":"Kelvin Y Mori, Cecília M Ferracini, Liliana Piatti, Hugo Cabral, Vanda Lúcia Ferreira","doi":"10.1590/0001-3765202520240469","DOIUrl":"https://doi.org/10.1590/0001-3765202520240469","url":null,"abstract":"Although the geographic distribution, phylogeny and natural history of Psomophis genimaculatus, a snake that inhabits diverse environments, such as the Chiquitana Forest, Cerrado, Pantanal, and Chaco, have been investigated in several studies, reproductive biology assessments are still lacking for this species. In this sense, this research investigated sexual dimorphism, sexual maturity, and reproductive cycle of P. genimaculatus, specimens from Brazil. Sexually reproductive females display longer body lengths, while males possess longer tails, although similar head lengths and widths are noted males and females. The female reproductive cycle exhibits a prolonged seasonal pattern, with secondary vitellogenesis taking place from September to June and oviductional eggs appearing between July and September. Follicular length, however, was not correlated to seasonality. Fecundity was not associated to body length but was closely aligned with potential fecundity. Histological assessments indicate secondary vitellogenesis beginning at follicle length of 7.6 mm. Ductus deferens and testicular volume in males are not influenced by body size or season. A spermatogenesis peak is noted in early autumn, with residual activity observed throughout winter. This study contributes with novel data on the reproductive biology of P. genimaculatus, aiding in this species conservation efforts.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97 1","pages":"e20240469"},"PeriodicalIF":1.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143762819","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

Avian malaria in birds from Atlantic Rainforest: a record of Plasmodium cathemerium and other novel lineages. 大西洋热带雨林鸟类中的禽疟原虫：疟原虫(Plasmodium cathemerium)和其他新品系的记录。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-03-31 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520240698

Talys H A Jardim, Mariana F Rossi, Huarrisson A Santos, Marta T D'Agosto, Roberto Júnio P Dias

引用次数: 0

Analysis of Deep Learning Techniques for Vehicle Detection and Reidentification Using Data from Multiple Drones and Public Datasets.

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-03-31 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520240623

Felipe P A Euphrásio, Rafael M DE Andrade, Elcio H Shiguemori, Liangrid L Silva, Moisés José S Freitas, Nathan Augusto Z Xavier, Argemiro S S Sobrinho

{"title":"Analysis of Deep Learning Techniques for Vehicle Detection and Reidentification Using Data from Multiple Drones and Public Datasets.","authors":"Felipe P A Euphrásio, Rafael M DE Andrade, Elcio H Shiguemori, Liangrid L Silva, Moisés José S Freitas, Nathan Augusto Z Xavier, Argemiro S S Sobrinho","doi":"10.1590/0001-3765202520240623","DOIUrl":"https://doi.org/10.1590/0001-3765202520240623","url":null,"abstract":"The detection and re-identification of vehicles in dynamic environments, such as highways monitored by a swarm of drones, presents significant challenges, particularly due to the variability of images captured from different angles and under various conditions. This scenario necessitates the development of suitable methods that integrate appropriate computational techniques, such as convolutional neural networks (CNN) to address the diversity of drone captures and improve accuracy in detection and re-identification. In this paper, a solution for vehicle detection and Re-ID is proposed, combining CNN techniques VGG16, VGG19, ResNet50, InceptionV3 and EfficientNetV2L. YOLOv4 was selected for detection, while the DeepSORT algorithm was chosen for tracking. The proposed solution considers the generalization capabilities of these techniques with varied images from different drones in different positions. Two datasets were employed: the first is a public dataset from Mendeley used for method evaluation, while the second consists of images and data collected by a swarm of drones. In the first experiment, the best performing network was ResNet50, with an average accuracy of 55%. In the second experiment, the highest accuracy CNN was VGG19, with 91% accuracy. Overall, the techniques were able to distinguish vehicles of different models and adapted to the data captured by drones.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97 2","pages":"e20240623"},"PeriodicalIF":1.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143762821","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

Characterization, effect of metal ions and organophosphates on the brain acetylcholinesterase of Nile Tilapia (Oreochromis niloticus) in vitro. 金属离子和有机磷对尼罗罗非鱼（Oreochromis niloticus）体外脑乙酰胆碱酯酶的特性和影响

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-03-31 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520240659

Allysson K DE Carvalho Silva, Fernanda Jeniffer L Lima, Suzane Meriely DA S Duarte, Marllen S DA Silva, Carolina B Cordeiro, Ulisses M Nascimento, Wener M T Dos Santos, Maria DO D S B Nascimento, Talita DA S Espósito, Antônio Carlos R Borges

{"title":"Characterization, effect of metal ions and organophosphates on the brain acetylcholinesterase of Nile Tilapia (Oreochromis niloticus) in vitro.","authors":"Allysson K DE Carvalho Silva, Fernanda Jeniffer L Lima, Suzane Meriely DA S Duarte, Marllen S DA Silva, Carolina B Cordeiro, Ulisses M Nascimento, Wener M T Dos Santos, Maria DO D S B Nascimento, Talita DA S Espósito, Antônio Carlos R Borges","doi":"10.1590/0001-3765202520240659","DOIUrl":"https://doi.org/10.1590/0001-3765202520240659","url":null,"abstract":"Acetylcholinesterase (AChE; EC 3.1.1.7) inhibition in vitro is an effective method for monitoring pesticide contamination, particularly organophosphates, offering advantages over in vivo approaches. Environmental factors like temperature, age, and stress can alter enzyme activity in vivo, making controlled in vitro studies necessary. This research focused on the brain AChE of Nile tilapia (Oreochromis niloticus), a key species in global aquaculture, to detect organophosphate contamination. The study examined pesticides such as chlorpyrifos, fenitrothion, malathion, and temephos. Optimal pH (8.0) and temperature (55°C) conditions were determined for AChE activity. The enzyme also showed sensitivity to several heavy metals, including Co²⁺, Cd²⁺, Cu²⁺, Hg²⁺, Mn²⁺, and Zn²⁺, with mercury causing 100% inhibition. AChE exhibited high substrate affinity, with a Vmax of 0.651 ± 0.26 mU/mg and a Michaelis-Menten constant (Km) of 399 mU/mg. Pesticide inhibition varied, with chlorpyrifos and temephos showing the highest efficacy at lower concentrations. IC20, IC50, and Ki values ranked pesticide potency as follows: malathion, fenitrothion, temephos, and chlorpyrifos. These results support the use of Nile tilapia AChE as a reliable environmental biomarker for detecting pesticides, offering valuable insights for environmental monitoring and filling gaps in the existing literature.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97 2","pages":"e20240659"},"PeriodicalIF":1.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143762823","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

Flesh and bone: The musculature and cervical movements of pterosaurs.

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-03-31 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520240478

Richard Buchmann, Taissa Rodrigues

{"title":"Flesh and bone: The musculature and cervical movements of pterosaurs.","authors":"Richard Buchmann, Taissa Rodrigues","doi":"10.1590/0001-3765202520240478","DOIUrl":"https://doi.org/10.1590/0001-3765202520240478","url":null,"abstract":"The osteological variations present in the cervical vertebrae of pterosaurs represent changes in the soft tissues of the neck and reflect their function. Here, we infer the presence, volume, and capacity of the cervical musculature of pterosaurs. We performed our analyses on three-dimensionally preserved cervical series of Anhanguera sp. (AMNH 22555), Anhanguera piscator (NSM-PV 19892), Azhdarcho lancicollis (ZIN PH and CCMGE, several specimens), and Rhamphorhynchus muensteri (MGUH 1891.738), the last three of which were digitally modeled for muscle reconstruction. We identified osteological correlates from structures observed in extant archosaur vertebrae and skulls and supported by Extant Phylogenetic Bracket (EPB) criteria. We estimated the muscular capacity using the \"Maximal Force Production\" formula. According to our analyses, at least thirteen muscles were present in the neck of pterosaurs, only one of which does not correspond to an EPB level I inference. The muscles that performed skull and neck pitching were more robust and stronger to execute the movements. Muscles that showed extremely low potential had a more cervical stabilization function. Specializations we identified in the muscles are compatible with the foraging habits previously inferred for these pterosaurs, namely surface fishing by Rhamphorhynchus and Anhanguera and capture of small terrestrial prey by Azhdarcho.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97Suppl. 1 Suppl. 1","pages":"e20240478"},"PeriodicalIF":1.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143762840","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

Testing the occlusal relations between isolated upper and lower molars of an Eocene metatherian (Mammalia): The case of Xenocynus crypticus.

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-03-31 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520240861

Leonardo M Carneiro, Hugo Bampi, Sérgio Lages

{"title":"Testing the occlusal relations between isolated upper and lower molars of an Eocene metatherian (Mammalia): The case of Xenocynus crypticus.","authors":"Leonardo M Carneiro, Hugo Bampi, Sérgio Lages","doi":"10.1590/0001-3765202520240861","DOIUrl":"https://doi.org/10.1590/0001-3765202520240861","url":null,"abstract":"Xenocynus crypticus is a metatherian from the Itaboraí Basin (early Eocene) in the state of Rio de Janeiro, Brazil. While this taxon was initially described based on a single upper molar and three isolated lower molars, the occlusal relations between these teeth have never been previously analyzed. In this study, the upper and lower molars assigned to this taxon, along with specimen AMNH 49805, were included in a scatterplot and two principal component analyses (PCA), assessing several morphometric parameters that were diagnostic of this taxon. We inferred the occlusal relationships between the assigned molars to assess their morpho-occlusal compatibility. Our analyses have demonstrated that the Xenocynus crypticus molars are morphometrically distinct from other sympatric taxa of similar size, with m1s having proportionally shorter talonids. Furthermore, the upper and lower molars of X. crypticus are occlusally compatible, exhibiting similar inferred proportions in the length and width of the talonid. These findings support the taxonomic validity of X. crypticus and an association of the lower molars with this species. Additionally, our results indicate that PCAs can reliably assess morphometric similarity between isolated upper and lower molars in metatherians, offering valuable insights for taxonomic studies on fragmentary dental-based taxa.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97 2","pages":"e20240861"},"PeriodicalIF":1.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143762836","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

Thematic trends in fact-checking in Brazil's COVID-19 infodemic: the first year in focus.

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-03-31 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520240316

Nathália Helena Azevedo, Luciana Massi, Guilherme S Lima

{"title":"Thematic trends in fact-checking in Brazil's COVID-19 infodemic: the first year in focus.","authors":"Nathália Helena Azevedo, Luciana Massi, Guilherme S Lima","doi":"10.1590/0001-3765202520240316","DOIUrl":"https://doi.org/10.1590/0001-3765202520240316","url":null,"abstract":"Fact-checking agencies were pivotal in countering misinformation during the COVID-19 pandemic. We investigated the predominant thematic orientations within Brazilian fact-checking agencies during the pandemic's initial year. Brazil's case is relevant because it has a high traffic of false information and was the second country most affected by the pandemic. From Latam Chequea Coronavirus's database, 838 assertions checked of fact-checking were analysed by automated content analysis, allowing the identification of the thematic incidence through descending hierarchical classification and factorial correspondence analysis. The emerged themes encompassed vaccine, virus origin, social isolation, economic relief, disease mortality, and treatment. Fact-checking agencies assigned varying levels of importance to specific themes, which may reinforce the idea of possible non-neutrality fact-checking journalism. Most categories displayed an irregular publication pattern, indicating they were not part of continuous communicative processes. This research addresses methodological, temporal, and sampling gaps by employing automated analysis, covering the pandemic's initial year, and utilising a substantial dataset from the global South. The study contributes to the ongoing discourse on fact-checking agencies' roles and limitations.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97 2","pages":"e20240316"},"PeriodicalIF":1.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143762838","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

The role of dispersal of repetitive DNAs in the diversification of bristlenose plecos (Loricariidae, Hypostominae, Ancistrus) from South Atlantic Coastal drainages.

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-03-31 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520240901

Fabio H Takagui, Luís P Santana, Marceleia Rubert, Patrik Viana, Paulo Roberto A M Affonso, Lucia Giuliano-Caetano

{"title":"The role of dispersal of repetitive DNAs in the diversification of bristlenose plecos (Loricariidae, Hypostominae, Ancistrus) from South Atlantic Coastal drainages.","authors":"Fabio H Takagui, Luís P Santana, Marceleia Rubert, Patrik Viana, Paulo Roberto A M Affonso, Lucia Giuliano-Caetano","doi":"10.1590/0001-3765202520240901","DOIUrl":"https://doi.org/10.1590/0001-3765202520240901","url":null,"abstract":"Sea-level changes during the Pleistocene and the geomorphological history have largely molded the intricate shaping of coastal drainages in Eastern South America. Therefore, freshwater fishes from this region are promising models to infer how riverine isolation and reconnections affected their genetic diversification and geographic distribution. In the present study, we provided a detailed cytogenomic analysis of Ancistrus multispinis and Ancistrus brevipinnis, including the physical mapping of repetitive DNA classes, to verify whether chromosome differentiation would be related to the split between two major watersheds in Southern Brazil. Both species of Ancistrus shared the same modal diploid number (2n=52) and karyotype formulae (14 metacentric, 8 submetacentric and 30 subtelo/acrocentric chromosomes), besides single and terminal 18S ribosomal cistrons, (CGG)10 microsatellite sequences interspersed with heterochromatin in nucleolar organizer regions and a dispersed content of (AC)15 and (GT)15 microsatellites. In turn, the patterns of heterochromatin distribution, number of (GAG)10 microsatellites and 5S rDNA clusters diverged between both taxa. Most likely, these microstructural differences were determined by independent evolutionary processes, strongly associated to the geographic isolation between watersheds. Furthermore, the mapping of repetitive DNAs revealed a dynamic reorganization of genomes of Ancistrus, being useful for the taxonomic disambiguation in this complex group of Neotropical fish.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97 1","pages":"e20240901"},"PeriodicalIF":1.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143762820","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

Raman evaluation of graphene oxide dispersed in naphthenic oil.

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-03-31 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202520240617

Alan Passero, Taynara A DE Carvalho, Natalia B Sanches, Lidia M S Murakami, Jorge Carlos N Dutra, Rita DE Cássia L Dutra

{"title":"Raman evaluation of graphene oxide dispersed in naphthenic oil.","authors":"Alan Passero, Taynara A DE Carvalho, Natalia B Sanches, Lidia M S Murakami, Jorge Carlos N Dutra, Rita DE Cássia L Dutra","doi":"10.1590/0001-3765202520240617","DOIUrl":"https://doi.org/10.1590/0001-3765202520240617","url":null,"abstract":"Graphene oxide is a revolutionary material that enhances properties in electronics, automotive, civil construction, aerospace, and industrial sectors. Even added in low levels (0.1 - 5.0%), properly dispersed in polymer composites, it results in significant differences in mechanical, thermal, chemical, and electrical properties. Often, a suitable dispersant facilitate homogenization and provides stability in the fabrication process. However, there are few studies in the literature that assess graphene oxide dispersion. This paper presents methodologies for determining the graphene oxide content and its dispersion in naphthenic plasticizer in the presence of surfactant. A multivariate method, based on partial least squares regression and Raman spectroscopy, was used to determine the particle size and graphene oxide content in the graphene oxide /plasticizer system, with linearity (R2 > 0.99) and analytical error (> 0.29%). A laser diffraction methodology was developed for the dispersibility study. The results contribute to the state of the art of researching industrial aerospace solutions for polymeric systems containing graphene oxide.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"97 2","pages":"e20240617"},"PeriodicalIF":1.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143762835","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