Anais da Academia Brasileira de Ciencias最新文献_第10页

Textile effluent treatment by reductive process using commercial steel wool followed by oxidative process. 先使用商用钢丝绒进行还原处理，然后再进行氧化处理的纺织污水处理方法。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2024-08-26 eCollection Date: 2024-01-01 DOI: 10.1590/0001-3765202420230851

Ana Carolina F Figueiredo, Kely V DE Souza

{"title":"Textile effluent treatment by reductive process using commercial steel wool followed by oxidative process.","authors":"Ana Carolina F Figueiredo, Kely V DE Souza","doi":"10.1590/0001-3765202420230851","DOIUrl":"https://doi.org/10.1590/0001-3765202420230851","url":null,"abstract":"Textile industries stand out as one of the main polluters of water resources, generating large amounts of liquid effluents with variable composition and intense coloration. The objective of this work is the integration of the reductive process using commercial steel wool, combined with oxidative processes, in the treatment of textile effluent. The effect of the variables of the reductive process were studied using a 32 factorial design. After 30 minutes, the reductive process allowed a reduction of 68% COD, 46% TOC, 62% true color and 72% of total phenols, but showed an increase in color apparent and turbidity, due to the iron species formed by the oxidation of steel wool during the process. With the combined process using sunlight, the reduction was 73% COD, 50% TOC, 97% phenols, 93% true color and 48% apparent color. With artificial light, the reduction was 94% COD, 63% TOC, 95% phenols, 98% true color and 65% apparent color. The evaluation of the acute toxicity against Daphnia magna indicated that after the proposed treatments, the effluent did not present toxicity or the toxicity was reduced. It is concluded that the combined process can be considered an efficient alternative for the treatment of textile effluent.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 4","pages":"e20230851"},"PeriodicalIF":1.1,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142078904","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

Anthropogenic effect on the pedochemical variability of potentially toxic elements at the vicinity of an Antarctic research station. 人类活动对南极考察站附近潜在有毒元素的植物化学变化的影响。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2024-08-26 eCollection Date: 2024-01-01 DOI: 10.1590/0001-3765202420230724

Caik O DE Miranda, Elias DE Lima Neto, Carlos Ernesto G R Schaefer

{"title":"Anthropogenic effect on the pedochemical variability of potentially toxic elements at the vicinity of an Antarctic research station.","authors":"Caik O DE Miranda, Elias DE Lima Neto, Carlos Ernesto G R Schaefer","doi":"10.1590/0001-3765202420230724","DOIUrl":"https://doi.org/10.1590/0001-3765202420230724","url":null,"abstract":"Antarctica represents an isolated continent devoted to conservation and scientific research, although it accumulates records of increasing anthropic contamination. The historical continued use of fuel for power generation in Antarctic settlements is a potential source of toxic elements to the soil. We investigate Cd, Cr, Cu, Mn, Ni, Pb, V and Zn levels in surface soils in the vicinity of the Henryk Arctowski Antarctic Station, aiming to identify anthropic effects on their local pedochemical variability. Pollution indices were used and compared to evaluate possible cumulative anthropic impacts, whereas correlation analyzes were explored to identify potential sources of contamination. High concentrations of Pb and Zn were locally observed near fuel tanks and machinery facilities. Correlation and principal component analysis suggest that old fuel tanks, vehicle traffic and machinery disturbance are key, and contrasting, sources of contamination. Among the eight indices we compared, Enrichment Factor and Modified Degree of Contamination were chosen, showing very high enrichment for Pb and moderate for Zn. All other elements presented minimal or null enrichment. The evidence of potentially toxic elements enrichment on Antarctic soils associated with the long-term occupation of Antarctic research stations highlights the need for further monitoring and mitigation measures, especially in energy-generating systems.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 suppl 2","pages":"e20230724"},"PeriodicalIF":1.1,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142078837","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

Waterborne metal levels in four freshwater lakes from Harmony Point, Nelson Island, Antarctica. 南极洲纳尔逊岛和谐点四个淡水湖的水载金属含量。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2024-08-26 eCollection Date: 2024-01-01 DOI: 10.1590/0001-3765202420231140

Bernardo Baldisserotto, Vinícius M Neves, Valderi L Dressler, Cristiano N Rosa, Ulisses F Bremer, Waterloo Pereira Filho

{"title":"Waterborne metal levels in four freshwater lakes from Harmony Point, Nelson Island, Antarctica.","authors":"Bernardo Baldisserotto, Vinícius M Neves, Valderi L Dressler, Cristiano N Rosa, Ulisses F Bremer, Waterloo Pereira Filho","doi":"10.1590/0001-3765202420231140","DOIUrl":"https://doi.org/10.1590/0001-3765202420231140","url":null,"abstract":"The aim of this study is to analyze the waterborne metal levels in four lakes (one endorheic and three exorheic) of Harmony Point, Nelson Island, Antarctica. Water samples were analyzed by using a quadrupole type inductively coupled plasma mass spectrometer and an inductively coupled plasma optical emission spectrometer. The levels of As, Cu, Mn, Mo, and V were significantly lower and those of Cr, Mg, Na, and Sr were significantly higher in the endorheic lake than in the other lakes. Most water samples presented levels of Ag, Be, Cd, Pb, Se, Tl, and U below the limit of quantification, while for Ba, Co, and Ni around half of the samples were below this limit. The waterborne metal levels were not significantly different between the exorheic lakes. Waterborne metal levels in the freshwater lakes from Harmony Point did not show any clear relationship with their levels in the soil of the region or with bird guano, and overall, their levels indicate an environment without anthropogenic influence. Apparently, the Na levels are influenced by salt spray from the ocean, as they are related to the distance of the lakes from the ocean.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 suppl 2","pages":"e20231140"},"PeriodicalIF":1.1,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142078839","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

Determinants of anuran assemblages in Amazonian White-sand Ecosystems. 亚马逊白沙生态系统中无尾目动物群落的决定因素。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2024-08-26 eCollection Date: 2024-01-01 DOI: 10.1590/0001-3765202420230082

Rafaela Caroline S Pereira, Jussara S Dayrell, Ramiro Dário Melinski, Albertina P Lima

{"title":"Determinants of anuran assemblages in Amazonian White-sand Ecosystems.","authors":"Rafaela Caroline S Pereira, Jussara S Dayrell, Ramiro Dário Melinski, Albertina P Lima","doi":"10.1590/0001-3765202420230082","DOIUrl":"https://doi.org/10.1590/0001-3765202420230082","url":null,"abstract":"Amazonian white-sand ecosystems have predominantly sandy soils and a high amount of endemism, and several species found within them are adapted to long periods of drought. However, little is known about the variation in the structure of anuran assemblages in these ecosystems. Considering that most species are not uniformly distributed in heterogeneous landscapes, we tested the hypothesis that anuran assemblage variation in white-sand ecosystems is related to changes in vegetation structure. Specifically, we focused on a heterogeneous patch of white-sand ecosystems of the central Amazon and evaluated whether vegetation structure and soil characteristics, including root depth, influence the richness, abundance, and composition of anuran assemblages. Our results showed that low amounts of clay in the soil play an important role in structuring vegetation in these ecosystems, and these are the main factors that organize anuran assemblages. The Campinaranas close to the water bodies have a high species richness, while Campina landscapes limit the occupation of most of species. Our findings indicate that anurans undergo environmental filtering in white-sand ecosystems and are organized into hierarchical subgroups, in which only species with specialized reproduction can successfully occupy the most water-restricted environments.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 4","pages":"e20230082"},"PeriodicalIF":1.1,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142078903","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

Biocontrol mechanisms of the Antarctic yeast Debaryomyces hansenii UFT8244 against post-harvest phytopathogenic fungi of strawberries. 南极酵母 Debaryomyces hansenii UFT8244 对草莓收获后植物病原真菌的生物防治机制。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2024-08-26 eCollection Date: 2024-01-01 DOI: 10.1590/0001-3765202420240255

Eskálath Morganna S Ferreira, Gabriela Garmendia, Vívian N Gonçalves, Juliana F M DA Silva, Peter Convey, Luiz Henrique Rosa, Silvana Vero, Raphael S Pimenta

{"title":"Biocontrol mechanisms of the Antarctic yeast Debaryomyces hansenii UFT8244 against post-harvest phytopathogenic fungi of strawberries.","authors":"Eskálath Morganna S Ferreira, Gabriela Garmendia, Vívian N Gonçalves, Juliana F M DA Silva, Peter Convey, Luiz Henrique Rosa, Silvana Vero, Raphael S Pimenta","doi":"10.1590/0001-3765202420240255","DOIUrl":"https://doi.org/10.1590/0001-3765202420240255","url":null,"abstract":"The use of yeasts has been explored as an efficient alternative to fungicide application in the treatment and prevention of post-harvest fruit deterioration. Here, we evaluated the biocontrol abilities of the Antarctic yeast strain Debaryomyces hansenii UFT8244 against the post-harvest phytopathogenic fungi Botrytis cinerea and Rhizopus stolonifer for the protection and preservation of strawberry fruit. The strongest inhibition of germination of B. cinerea (57%) was observed at 0 °C, followed by 40% at 25 °C. In addition, germ tubes and hyphae of B. cinerea were strongly surrounded and colonized by D. hansenii. Production of the enzymes β-1,3-glucanase, chitinase and protease by D. hansenii was detected in the presence of phytopathogenic fungus cell walls. The activity of β-1,3-glucanase was highest on day 12 of incubation and remained high until day 15. Chitinase and protease activities reached their highest levels on the day 15 of incubation. D. hansenii additionally demonstrated the ability to resist oxidative stress. Our data demonstrated that the main biocontrol mechanisms displayed by D. hansenii were the control of phytopathogenic fungal spore germination, production of antifungal enzymes and resistance to oxidative stress. We conclude that isolate D. hansenii UFT8422 should be further investigated for use at commercial scales at low temperatures.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 suppl 2","pages":"e20240255"},"PeriodicalIF":1.1,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142078838","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

Errata. 勘误表。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2024-08-26 DOI: 10.1590/0001-3765202420221048e

引用次数: 0

Impact of the COVID-19 pandemic on the severity of newly diagnosed cases of head and neck cancer in southern Brazil. COVID-19 大流行对巴西南部头颈癌新确诊病例严重程度的影响。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2024-08-26 eCollection Date: 2024-01-01 DOI: 10.1590/0001-3765202420230462

Kívia L Ferrazzo, Cristiane C Danesi, Nara Maria B Martins, Raquel P Antoniazzi

{"title":"Impact of the COVID-19 pandemic on the severity of newly diagnosed cases of head and neck cancer in southern Brazil.","authors":"Kívia L Ferrazzo, Cristiane C Danesi, Nara Maria B Martins, Raquel P Antoniazzi","doi":"10.1590/0001-3765202420230462","DOIUrl":"10.1590/0001-3765202420230462","url":null,"abstract":"This observational study aimed retrospectively assess the impact of the COVID-19 pandemic on the head and neck squamous cell carcinoma (HNSCC) diagnosis and severity of the disease in southern Brazil. All new cases diagnosed with HNSCC from March 11, 2019 to March 10, 2020 (pre-COVID-19) and from March 11, 2020 to March 10, 2021 (COVID-19) were included. The data collected were: date of the histopathological diagnosis, sociodemographic data, place of residence, data related to the tumor (location of the primary tumor, lymph node involvement, distant metastasis and TNM clinical staging), time elapsed between the diagnosis and treatment initiation. There was no significant difference in the number of new diagnoses in the COVID-19 group (n=45) compared to the pre-COVID-19 group (n=47). There was also no statistical difference regarding patients' sociodemographic profile, time between diagnosis and treatment, and overall TNM staging. However, the clinical N classification was more severe in the COVID-19 group (p=0.021). Patients diagnosed during the COVID-19 pandemic were 4.05 times more likely to have the N-stage more advanced (95% CI:1.62 - 10.12). Although there was no reduction in the number of new diagnosis of HNSCC during COVID-19 pandemic, the diagnosed cases showed lymph node metastasis in more advanced stages.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 3","pages":"e20230462"},"PeriodicalIF":1.1,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142078902","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 theoretical view on the stereochemistry of 1,3-benzoxazol-2-(3H)-ylidenes obtained from double vinylic substitution. 通过双乙烯基取代获得的 1,3-苯并恶唑-2-(3H)-亚基的立体化学理论观点。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2024-08-23 eCollection Date: 2024-01-01 DOI: 10.1590/0001-3765202420240156

Matheus P DE Freitas, Ana Júlia F Souza, Julliane Yoneda, Diego P Sangi

引用次数: 0

An investigation on the physical properties of cementitious pastes modified with low dosage of waste glass powder and silica fume. 关于用低剂量废玻璃粉和硅灰改性的水泥浆物理性质的研究。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2024-08-23 eCollection Date: 2024-01-01 DOI: 10.1590/0001-3765202420231153

André L S Patriota, Filipe B M Barros, Arnaldo M P Carneiro, Pedro L Guzzo

{"title":"An investigation on the physical properties of cementitious pastes modified with low dosage of waste glass powder and silica fume.","authors":"André L S Patriota, Filipe B M Barros, Arnaldo M P Carneiro, Pedro L Guzzo","doi":"10.1590/0001-3765202420231153","DOIUrl":"https://doi.org/10.1590/0001-3765202420231153","url":null,"abstract":"Portland cement (PC) production is among the industrial activities that most emit harmful gases. Its replacement to green binders turns into a timely issue to face the global restrictions due to climate changes. In this study, some properties of cementitious pastes prepared with waste packing glass powder (GP) and silica fume (SF) were characterized in line with a prefixed alkaline equivalent limit. These materials were obtained in Northeastern Brazil. Grinding operations used to produce GP into four size ranges ([45-75] µm, < 45 µm; [25-45] µm, < 25 µm) were disclosed. X ray diffraction showed that GP and SF substitutions did not change the hydration products commonly observed in PC pastes. The portlandite content measured with thermogravimetry was affected by GP size in both unitary and binary substitutions. The compressive strength measured after 56 days of curing was dependent on portlandite and void index contents measured in hardened pastes. Scanning electron microscopy coupled to energy dispersive spectroscopy were useful to show the effect of the particle size on the pozzolanic activity. It was found that 5% of PC replacement for GP < 25 µm was enough to raise the compressive strength by ~5%. For binary substitution, the strength increasing was ~ 20 %. The collectors of solid residues are the main players of waste glass recycling in Brazil. It is expected that the results of this study contribute to take out these workers from the fringes of the citizenship.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 3","pages":"e20231153"},"PeriodicalIF":1.1,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142078899","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

Artificial Neural Network and Remote Sensing combined to predict the Aboveground Biomass in the Cerrado biome. 人工神经网络与遥感相结合，预测塞拉多生物群落的地上生物量。

IF 1.1 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2024-08-23 eCollection Date: 2024-01-01 DOI: 10.1590/0001-3765202420221041

Paula L G Oliveira, Eraldo A T Matricardi, Eder P Miguel, Ben Hur Marimon Júnior, Alba Valéria Rezende

{"title":"Artificial Neural Network and Remote Sensing combined to predict the Aboveground Biomass in the Cerrado biome.","authors":"Paula L G Oliveira, Eraldo A T Matricardi, Eder P Miguel, Ben Hur Marimon Júnior, Alba Valéria Rezende","doi":"10.1590/0001-3765202420221041","DOIUrl":"https://doi.org/10.1590/0001-3765202420221041","url":null,"abstract":"Cerrado is the second largest biome in Brazil, and it is responsible for providing us several ecosystem services, including the functions of storing Carbon and biodiversity conservation. In this study, we developed a modeling approach to predict the Aboveground biomass (AGB) in Cerrado vegetation using Artificial Neural Networks (ANNs), vegetation indices retrieved from RapidEye satellite imagery, and field data acquired within the Federal District territory, Brazil. Correlation testing was performed to identify potential vegetation index candidates to be used as input in the AGB modeling. Several ANNs were trained to predict the AGB in the study area using vegetation indices and field data. The optimum ANN was selected according to criteria of mean error of the estimate, correlation coefficient, and graphical analysis. The best performing ANN showed a predictive power of 90% and RMSE less than 17%. The validation tests showed no significant difference between the observed and ANN-predicted values. We estimated an average AGB of 16.55± 8.6 Mg.ha-1 in shrublands in the study area. Our study results indicate that vegetation indices and ANNs combined could accurately estimate the AGB in the Cerrado vegetation in the study area, showing to be a promising methodological approach to be broadly applied throughout the Cerrado biome.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"96 3","pages":"e20221041"},"PeriodicalIF":1.1,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142078900","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