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

TerraSAR-X SAR data for classification of ice-free areas and glacier facies on Fildes Peninsula, King George Island, Antarctica. 南极洲乔治国王岛菲尔德斯半岛无冰区和冰川相分类的TerraSAR-X SAR数据。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-01-13 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202420240362

André M DE Andrade, Roberto F M Michel, Kátia K DA Rosa, Ulisses F Bremer, Carlos Ernesto G R Schaefer, Jefferson C Simões

{"title":"TerraSAR-X SAR data for classification of ice-free areas and glacier facies on Fildes Peninsula, King George Island, Antarctica.","authors":"André M DE Andrade, Roberto F M Michel, Kátia K DA Rosa, Ulisses F Bremer, Carlos Ernesto G R Schaefer, Jefferson C Simões","doi":"10.1590/0001-3765202420240362","DOIUrl":"https://doi.org/10.1590/0001-3765202420240362","url":null,"abstract":"The region of the Maritime Antarctic suffers significantly from climate change, resulting in regional warming and consequently affecting coverage. This study characterized three surface zones of Collins Glacier and three other zones in ice-free areas on the Fildes Peninsula, which has an area of 29.6 km². We used TerraSAR-X satellite images from 2014 to 2016 and analyzed the influence of meteorological and environmental conditions on these surface zones. We used five images from the TerraSAR-X satellite, three of these data were obtained during the same period of fieldwork. The classification considered three classes on the glacier (higher moisture, transition in moisture, and lower moisture) and three on the ice-free areas (wet snow, transition wet snow-bare ice, and bare ice), using Maximum Likelihood and ISODATA methods. In low-altitude glaciers with maritime influence, such as Collins, monitoring variations in surface zones is essential because the continuous increase in exposed ice may indicate potential retreat. The TerraSAR-X images enabled the classification of land features, highlighting the potential for continuous monitoring in the Maritime Antarctic, regardless of weather conditions and solar illumination.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 suppl 2","pages":"e20240362"},"PeriodicalIF":1.1,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142998542","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

Polyphenolic contents, antioxidant, and antimicrobial activities of Saccocalyx satureioides Coss. & Dur. essential oil and methanol extracts. 甜果多酚含量、抗氧化及抗菌活性研究。&大调的。精油和甲醇提取物。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-01-13 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202420240703

Noui Hendel, Djamel Sarri, Madani Sarri, Achwaq Ali Ghafsi, Aicha Benseghir

{"title":"Polyphenolic contents, antioxidant, and antimicrobial activities of Saccocalyx satureioides Coss. & Dur. essential oil and methanol extracts.","authors":"Noui Hendel, Djamel Sarri, Madani Sarri, Achwaq Ali Ghafsi, Aicha Benseghir","doi":"10.1590/0001-3765202420240703","DOIUrl":"https://doi.org/10.1590/0001-3765202420240703","url":null,"abstract":"The whole plant Saccocalyx satureioides, an endemic medicinal plant in Algeria, was evaluated for its polyphenolic contents, antioxidant and antimicrobial activities. The polyphenolic contents of the plant methanolic extracts ranged from 170.47 to 285.56 (µg GAEs/mg extract) and from 25.39 to 82.68 (µg QEs/mg extract), respectively. High antioxidant activity was registered: DPPH average IC50 = 14.68 µg/mL, and β-carotene average IC50 = 21.08 µg/mL. The essential oil and methanolic extracts from the aerial parts and roots were tested against bacteria and molds. Different methods, including disk diffusion, well diffusion, and microdilution tests for bacteria, were used. The essential oil (February and June harvest periods) value 1.25 µL/mL was the MIC and the MBC for all bacterial strains, except E. coli, K. pneumonia and Ps. aeruginosa. The average fungal inhibition of the methanol extracts ranged from 5.10 to 71.25%, except for F. oxysporum. The essential oil effect was 6.67-83.53% and 17.01-90.57% by the food poisoned and fumigation methods, respectively. The preliminary phytochemical evaluation demonstrated the high polyphenolic contents and effective antioxidant power of the plant extracts. This may have an essential role in the antimicrobial effectiveness and indicate that the plant contains high-quality bioactive molecules in addition to the essential oil.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 suppl 3","pages":"e20240703"},"PeriodicalIF":1.1,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142998759","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

DNA metabarcoding reveal hidden diversity of periphytic eukaryotes on marine Antarctic macroalgae. DNA元条形码揭示了南极海洋巨藻周围植物真核生物隐藏的多样性。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-01-13 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202420240570

Paulo Eduardo A S Câmara, Franciane Maria Pellizzari, Fabyano A C Lopes, Eduardo T Amorim, Fábio L V Bones, Dafne A Anjos, Micheline Carvalho-Silva, Peter Convey, Luiz Henrique Rosa

{"title":"DNA metabarcoding reveal hidden diversity of periphytic eukaryotes on marine Antarctic macroalgae.","authors":"Paulo Eduardo A S Câmara, Franciane Maria Pellizzari, Fabyano A C Lopes, Eduardo T Amorim, Fábio L V Bones, Dafne A Anjos, Micheline Carvalho-Silva, Peter Convey, Luiz Henrique Rosa","doi":"10.1590/0001-3765202420240570","DOIUrl":"https://doi.org/10.1590/0001-3765202420240570","url":null,"abstract":"Polar marine macroalgae thrive in extreme conditions, often displaying geographic isolation and high degree of endemism. The \"phycosphere\" refers to the zone around the algae inhabited by microrganisms. Our study used DNA metabarcoding to survey the eukaryotic communities associated with seven seaweed species obtained at King George Island (South Shetland Islands, maritime Antarctic), including two Rhodophyta, two Chlorophyta and three Phaeophyceae. The ITS2 region was used as a barcode and our analysis yielded 77 eukaryotic ASVs spanning five Kingdoms (Fungi, Metazoa, Chromista, Protozoa, and Viridiplantae) and ten phyla (Ascomycota, Basidiomycota, Cercozoa, Ciliophora, Ochrophyta, Amebozoa, Chlorophyta, Rhodophyta, Bryophyta and Cnidaria). Additionally, we identified 14 potential new occurrence records for Antarctica. Ciliates and green algae were the most species-rich groups. The most abundant assigned associated species was Monostroma angicava (Chrorophyta). Within the macroalgal, the Chlorophyceans Ulothrix sp. hosted the greatest number of taxa, followed by Monostroma hariotii. Our data suggested that Antarctic macroalgae host a rich diversity of associated organisms and the biodiversity associated with the phycosphere remains underestimated.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 suppl 2","pages":"e20240570"},"PeriodicalIF":1.1,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142998525","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

Soilscapes from Byers Peninsula, Maritime Antarctic: landform-lithology controls in soil formation. 南极海域拜尔斯半岛土壤景观：地形岩性对土壤形成的控制。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-01-13 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202420240583

Jônatas Pedro DA Silva, Márcio R Francelino, André Luiz L DE Faria, Heitor P Palma, Isabelle DE A Oliveira, José João L L DE Souza, Carlos Ernesto G R Schaefer

{"title":"Soilscapes from Byers Peninsula, Maritime Antarctic: landform-lithology controls in soil formation.","authors":"Jônatas Pedro DA Silva, Márcio R Francelino, André Luiz L DE Faria, Heitor P Palma, Isabelle DE A Oliveira, José João L L DE Souza, Carlos Ernesto G R Schaefer","doi":"10.1590/0001-3765202420240583","DOIUrl":"https://doi.org/10.1590/0001-3765202420240583","url":null,"abstract":"The Byers Peninsula, the largest ice-free area in Maritime Antarctica, is vital for studying landscape-scale natural processes due to its diverse periglacial landforms. This study aim to characterize the soils and environments of its southern sector, focusing on soil-landform-lithology interactions. Thirty-seven soil profiles were classified, collected, and chemically and physically analyzed. Principal component analysis explored relationships among variables in these profiles and 36 others from the Peninsula project database. The soils are generally shallow, with lithic or paralithic contact within the first meter. Four main soil groups were identified: patterned-ground soils on plateaus, ornithogenic soils, non-ornithogenic soils, and non-ornithogenic sodic and sandy soils on beaches and marine terraces. The Peninsula, divided into six geological units, represents a diverse periglacial morphogenetic system. Sixteen landform types were identified, each associated with different processes, topographies, lithologies, altitudes, and orientations, highlighting the importance of periglacial morphogenesis. Stable soilscapes, such as upper cryoplanation platforms, raised beaches, volcanic plugs, and ornithogenically influenced areas, show greater soil development and weathering. In contrast, dynamic periglacial landforms like scree stony slopes and talus exhibit minimal soil development and instability. The Byers Peninsula's pedodiversity is due to its varied lithologies, landforms, extensive ornithogenic influences from seabirds, and long-term vegetation establishment.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 suppl 2","pages":"e20240583"},"PeriodicalIF":1.1,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142998528","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

Inhibitory Effect on the Tyrosinase Activity and Low Cytotoxicity of Monounsaturated Long-Chain Chelating Fatty Ester. 单不饱和长链螯合脂肪酯对酪氨酸酶活性的抑制作用及低细胞毒性。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-01-13 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202420240668

Antonio Sergio C Carvalho, Tatiana N Pedrosa, Heronildes A Dantas Filho, Raquel C Montenegro, Emerson S Lima, Marne C DE Vasconcellos, Alberdan S Santos

{"title":"Inhibitory Effect on the Tyrosinase Activity and Low Cytotoxicity of Monounsaturated Long-Chain Chelating Fatty Ester.","authors":"Antonio Sergio C Carvalho, Tatiana N Pedrosa, Heronildes A Dantas Filho, Raquel C Montenegro, Emerson S Lima, Marne C DE Vasconcellos, Alberdan S Santos","doi":"10.1590/0001-3765202420240668","DOIUrl":"https://doi.org/10.1590/0001-3765202420240668","url":null,"abstract":"In the present study, 5-Hydroxy-2-(Oleoyloxymethyl) -4H-pyran-4-one (KMO 3), and their chelated with Cu(II) and Fe(III) ions were synthesized to explore their inhibitory activity against tyrosinase and cytotoxicity. To this end, the structures of the obtained compounds were confirmed by ATR/FT-IR, 13C and 1H-NMR, and UV-vis techniques. The results show that chelating fatty ester presents the bands at 1567m, 1511w cm-1 attributed to the coordinated carbonyl (Cu(II)←[O=C]2), and the bands at 1540m, 1519m cm-1 which were attributed to the coordinated carbonyl (Fe(III)←[O=C]3). The inhibitory effect of chelating Oleic acid 2 (inhibition 68.3% ± 4.5) showed a factor of 19 times higher than free fatty acid (3.6% ± 3.2). IC50 Anti-tyrosinase activity of the Kojic acid 1 and KMO 3 compounds were 62.8 ± 6.6 µM and 77.6 ± 4.3 µM. The IC50 and IC90 values for tyrosinase inhibitory activity for chelating fatty ester and their complexes are values > 400 µM. Finally, the assay with the series showed no hemolytic activity (EC50> 250 μg mL-1), and not cytotoxic to B16F10, ACP-02, and human dermal fibroblast cells at 100 µM and showed no hemolytic potential at the concentration of IC50 250 µM.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 suppl 3","pages":"e20240668"},"PeriodicalIF":1.1,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142998547","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

Production of free fatty acids by enzymatic hydrolysis of residual frying oil using non-commercial lipases from Aspergillus niger. 利用黑曲霉非商业脂肪酶水解煎炸油生产游离脂肪酸。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-01-13 eCollection Date: 2025-01-01 DOI: 10.1590/0001-3765202420240781

Claudio Junior Dos Santos, Rosiane Dos Santos, Keilla S Cerqueira, Jacqueline R S Rodrigues, Roberto R DE Souza

{"title":"Production of free fatty acids by enzymatic hydrolysis of residual frying oil using non-commercial lipases from Aspergillus niger.","authors":"Claudio Junior Dos Santos, Rosiane Dos Santos, Keilla S Cerqueira, Jacqueline R S Rodrigues, Roberto R DE Souza","doi":"10.1590/0001-3765202420240781","DOIUrl":"https://doi.org/10.1590/0001-3765202420240781","url":null,"abstract":"Lipases are enzymes that have an important role in the industry for their wide use, giving rise to a great interest in industrial bioprocesses due to their versatility. One of the applications is the enzymatic hydrolysis of waste oils. This work consists of evaluating the production of lipases using several concentrations of residual frying oil (RFO) and different pHs, through ANOVA analysis. The production of free fatty acids was carried out by hydrolysis of RFO using noncommercial lipases produced in the previous step. The production of lipase enzymes was favored at pH 2.0, with an oil concentration of 1.5% (v/v) for a period of 24 hours, resulting in an enzyme activity of 141.90 U. mL-1 . The highest result of enzymatic hydrolysis of RFO was 20.70% in 40 minutes. This conversion was favored by increasing the concentration of the enzymatic extract. In this study, it was possible to obtain free fatty acids (FFAs) using a noncommercial enzyme and waste oil as an environmentally correct and low-cost alternative.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 suppl 3","pages":"e20240781"},"PeriodicalIF":1.1,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142998760","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

New challenges ahead in scientific publishing. 科学出版面临的新挑战。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2025-01-10 DOI: 10.1590/0001-37652024964

Alexander W A Kellner

引用次数: 0

Role of the Southern Annular Mode in the sea level over the southern Blue Amazon. 南环模在蓝亚马逊南部海平面中的作用。

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: 10.1590/0001-3765202420240592

Venisse Schossler, Francisco E Aquino, Jefferson C Simões, Rafael C Silva, Gabriel S Hofmann, Denilson R Vianna, Pedro H R Lira, Gianluca Pozzi, Andressa M DE Oliveira

引用次数: 0

Anthophilous beetles ubiquitously inhabit night-blooming cacti but exhibit distinct responses to the spatial distribution of flowers. 嗜花甲虫普遍栖息于夜花仙人掌中，但对花的空间分布有明显的响应。

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: 10.1590/0001-3765202420231361

Arthur Domingos-Melo, Artur C D Maia, Paulo Milet-Pinheiro

{"title":"Anthophilous beetles ubiquitously inhabit night-blooming cacti but exhibit distinct responses to the spatial distribution of flowers.","authors":"Arthur Domingos-Melo, Artur C D Maia, Paulo Milet-Pinheiro","doi":"10.1590/0001-3765202420231361","DOIUrl":"https://doi.org/10.1590/0001-3765202420231361","url":null,"abstract":"Night-blooming cacti, primarily pollinated by bats and hawkmoths, also attract beetles seeking food and safe shelter for mating and brooding their offspring. The influence of flower density on beetle visitation rates remains unclear, with responses varying by species and environmental factors. In the Caatinga Seasonally Dry Tropical Forest, we studied the flower occupancy distribution of two beetle species, Cyclocephala paraguayensis and Nitops aff. pilosocerei, in Pilosocereus pachycladus cacti. Our findings indicate that both beetle species act as commensals with minimal impact on effective pollination. They forage for nectar and pollen without causing damage to pistils or ovaries. N. aff. pilosocerei was more abundant than C. paraguayensis, and their distributions significantly differed, with N. aff. pilosocerei displaying a more uniform spread. Instances of both species occupying the same flower were more frequent than exclusive occupation. Nitops aff. pilosocerei abundance exhibited spatial autocorrelation. Flower height and beetle species influenced the total number of beetles within flowers. Future studies should explore the impact of cactus flower distribution on beetle abundance with other species, conduct selective pollination experiments to determine their role as pollinators, and investigate how flower-beetle interaction systems are affected by flower and individual distribution in processes like florivory and pollination.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 suppl 3","pages":"e20231361"},"PeriodicalIF":1.1,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142852176","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 a special issue on Antarctic research to the AABC impact factor. 南极研究特刊对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: 10.1590/0001-3765202496s2

Alexander W A Kellner

引用次数: 0