Anais da Academia Brasileira de Ciencias最新文献_第2页

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

Addressing Gearbox Health Monitoring Challenges for Helicopters: A Machine Learning Approach. 解决直升机变速箱健康监测挑战：一种机器学习方法。

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: 10.1590/0001-3765202420240404

Guilherme Moreira, Alexandre Pereira, Airton Nabarrete, Willer Gomes

引用次数: 0

Water masses drive the spatial and temporal distribution of marine Archaea in the northern Antarctic Peninsula. 南极半岛北部海洋古菌的时空分布受水体影响。

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: 10.1590/0001-3765202420240585

Luana C Vargas, Laiza C Faria, Lucas T Pereira, Camila N Signori

{"title":"Water masses drive the spatial and temporal distribution of marine Archaea in the northern Antarctic Peninsula.","authors":"Luana C Vargas, Laiza C Faria, Lucas T Pereira, Camila N Signori","doi":"10.1590/0001-3765202420240585","DOIUrl":"https://doi.org/10.1590/0001-3765202420240585","url":null,"abstract":"The Southern Ocean influences the planet's biogeochemical cycles. Marine microorganisms are important in this scenario, being the main biological agents in the cycling of many elements. The Archaea domain is widely distributed in the oceans, and its presence in Antarctica is acknowledged. In this context, this work aimed to analyze the diversity and distribution of archaea according to environmental parameters in the waters surrounding the north of the Antarctic Peninsula. For environmental characterization studies, surface and bottom data were used for the ten monitoring stations of expeditions that took place in the summer of 2014 and 2015. The sequencing of the 16S rRNA gene was performed on the Illumina HiSeq platform, using the SILVA v138 database. The results revealed the presence of three main water bodies: Antarctic Surface Water, Shelf Waters, and modified Circumpolar Deep Water. Deep waters had higher diversity than surface waters, and the dominant groups were Nitrososphaeria and MGII. In the study region, the main factor responsible for the differences in the ecosystems was the presence of distinct water masses and the stratification of the water column. We argue that it is essential to consider water mass dynamics to study the microbial landscape of the Southern Ocean.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 suppl 2","pages":"e20240585"},"PeriodicalIF":1.1,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142852162","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

Allometric mixed-effects models for Dicksonia sellowiana Hook. and its contribution to biomass stocks of Araucaria forests in southern Brazil. 黄钩花异速生长混合效应模型。及其对巴西南部Araucaria森林生物量储量的贡献。

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: 10.1590/0001-3765202420230176

Laio Zimermann Oliveira, Alexander Christian Vibrans, Adilson Luiz Nicoletti, Jocasta Lerner

引用次数: 0

Spatial distribution of atmospheric pollutants and fire outbreaks in the Pantanal biome from 2016 to 2021. 2016 - 2021年潘塔纳尔生物群落大气污染物空间分布与火灾爆发

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: 10.1590/0001-3765202420240174

Débora S Alvim, Cássio Aurélio Suski, Mariana C Kasemodel, Dirceu Luís Herdies, João H Megale, Rafael C G DE Oliveira, Monica Tais S D'Amelio, Simone Marilene S DA Costa, Sergio M Corrêa, Silvio N Figueroa

{"title":"Spatial distribution of atmospheric pollutants and fire outbreaks in the Pantanal biome from 2016 to 2021.","authors":"Débora S Alvim, Cássio Aurélio Suski, Mariana C Kasemodel, Dirceu Luís Herdies, João H Megale, Rafael C G DE Oliveira, Monica Tais S D'Amelio, Simone Marilene S DA Costa, Sergio M Corrêa, Silvio N Figueroa","doi":"10.1590/0001-3765202420240174","DOIUrl":"https://doi.org/10.1590/0001-3765202420240174","url":null,"abstract":"Pantanal fires have a significant impact on the environment. Anthropogenic emissions of residual gases have changed the tropospheric composition in this region due to burning. This study aims to analyze the spatial patterns of atmospheric pollutants (including carbon monoxide (CO), nitrogen dioxide (NO2), black carbon (BC), organic carbon (OC) and sulfur dioxide (SO2) and aerosol optical depth, along with fire outbreaks across the Pantanal biome from 2016 to 2021. The data collected is based on remote sensing data. The fire outbreaks peaked pollutant concentrations reached their highest between June to November, particularly during the drier months of August to October. This increase was even greater during the last three years (2019-2021), especially in 2020, when the average CO, NO2, SO2, BC, and OC concentrations increased by 29%, 31%, 50%, 52%, and 50%, respectively. The rainfall values do not justify the increase in the number of fire outbreaks between 2019 and 2021, indicating that the rise is likely due to increased burning. In 2021, the average monthly rainfall was 48% greater than that in 2016-2020 but it had the highest FRP value and the second highest fire outbreak number and pollutant concentration. The 2020 year experienced a record number of fire outbreaks and the highest levels of pollutants in the atmosphere in the region for this period.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 suppl 3","pages":"e20240174"},"PeriodicalIF":1.1,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142852210","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