Revista Virtual de Química最新文献_第2页

Materials from Cellulose: Origin, Synthesis and Applications 纤维素材料:来源、合成和应用

Revista Virtual de Química Pub Date : 2023-01-01 DOI: 10.21577/1984-6835.20230037

Rafael B. W. Evaristo, Romulo C. Dutra, Paulo A. Z. Suarez, Grace F. Ghesti

引用次数: 0

Carvacrol and its Semi-synthetic Derivatives as Potential Antibacterial Agents 香芹酚及其半合成衍生物作为潜在的抗菌剂

Revista Virtual de Química Pub Date : 2023-01-01 DOI: 10.21577/1984-6835.20230020

Isabelle H. Castro, Fabrício A. A. Oliveira, Carla C. Perez, Marcelle L. F. Bispo

引用次数: 0

Analysis of Structural Modifications of Phlogoptite from Bahia/Brazil as an Alternative Source of Potassium in Agriculture 巴西巴伊亚省云母作为农业替代钾源的结构修饰分析

Revista Virtual de Química Pub Date : 2023-01-01 DOI: 10.21577/1984-6835.20230033

Tainara C. de Assis, Maria L. F. de Azevedo, Adriana de A. S. Felix, Fernanda A. N. G. da Silva, Fernanda V. M. Pontes, Adão B. da Luz B. da Luz, Carla N. Barbato, Aline M. dos S. Teixeira

{"title":"Analysis of Structural Modifications of Phlogoptite from Bahia/Brazil as an Alternative Source of Potassium in Agriculture","authors":"Tainara C. de Assis, Maria L. F. de Azevedo, Adriana de A. S. Felix, Fernanda A. N. G. da Silva, Fernanda V. M. Pontes, Adão B. da Luz B. da Luz, Carla N. Barbato, Aline M. dos S. Teixeira","doi":"10.21577/1984-6835.20230033","DOIUrl":"https://doi.org/10.21577/1984-6835.20230033","url":null,"abstract":"Brazil has an enormous agricultural potential, but crop yields can be hampered by the lack of some nutrients in soil. Potassium is one of the main macronutrients needed for plant development. The low content of potassium available in soil makes it necessary to apply fertilizers, mainly imported. In order to promote the development of the sector, phlogoptite rock was studied, from Pindobaçu region, Bahia, which contains 8.26% of K 2 O in its chemical composition. Two structural modification methods were applied. The first was the samples calcination with 10% w/w of CaO at different temperatures. The second involved mechanochemical activation by 10% of CaO for 30, 60 and 90 min followed by calcination at different temperatures. In both cases, the samples were submitted to extraction tests with citric acid 0.1 mol.L -1 . At the end of the tests, it was observed an increase in the nutrient solubility, going from 0.450 g.L -1 in the unprocessed rock to 4.14 g.L -1 in the sample calcined at 1,200 °C after addition of 10% w/w of CaO and to 25.1 g.L -1 in the sample subjected to mechanochemical activation for 90 minutes with 10% w/w of CaO, calcined at 1,000 °C.","PeriodicalId":21315,"journal":{"name":"Revista Virtual de Química","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82162100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Primary Sludge from Paper Processing as Filler in Poly(lactic acid) Composite: Physical, Thermal and Mechanical Properties 造纸过程中产生的初级污泥在聚乳酸复合材料中的填充作用:物理、热、机械性能

Revista Virtual de Química Pub Date : 2023-01-01 DOI: 10.21577/1984-6835.20230028

Lucas Franco Wrege, R. Marangoni

{"title":"Primary Sludge from Paper Processing as Filler in Poly(lactic acid) Composite: Physical, Thermal and Mechanical Properties","authors":"Lucas Franco Wrege, R. Marangoni","doi":"10.21577/1984-6835.20230028","DOIUrl":"https://doi.org/10.21577/1984-6835.20230028","url":null,"abstract":"This article characterizes and evaluates the use of primary sludge from the paper industry as a filler in poly(lactic acid) polymer. To improve the matrix/filler interaction, chemical treatments were carried out in the primary sludge, using alkaline sodium hydroxide solution, nitric acid solution and citric pectin. The composites were made with 1, 3 and 5% (wt/wt%). The composites were characterized by thermogravimetry (TGA) and differential scanning calorimetry (DSC), X-ray diffraction (XRD), vibrational infrared spectroscopic analysis (FTIR), scanning electron microscopy (SEM) and mechanical tensile and flexure tests. Thermal analyzes indicate a reduction of up to 8.35% in the decomposition temperature of the composite. FTIR analysis indicated that there was no molecular interaction between polymer and filler. The morphological analyzes using SEM, demonstrated a better interfacial adhesion of the filler with the polymer in the sludge treated with pectin. The mechanical tensile tests showed an improvement in the maximum tensile stress of up to 1.77% and 5.48% in the modulus of elasticity. The maximum flexural strength had an increase of up to 5.76% in relation to the unloaded PLA and the flexural modulus had an increase of up to 10.42%.","PeriodicalId":21315,"journal":{"name":"Revista Virtual de Química","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72725478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sorption and Desorption of Cyantraniliprole in Soils with Different Attributes 氰甲酰胺在不同性质土壤中的吸附与解吸

Revista Virtual de Química Pub Date : 2023-01-01 DOI: 10.21577/1984-6835.20230026

Stefania Mora Güezguán, Adalin Cezar Morais de Aguiar, Renata Pereira Lopes, A. F. Oliveira, A. D. da Silva

引用次数: 0

Metal Removal Using Fe3O4-Chitosan Nanoparticles for Environmental Applications fe3o4 -壳聚糖纳米颗粒去除金属的环境应用

Revista Virtual de Química Pub Date : 2023-01-01 DOI: 10.21577/1984-6835.20230053

Emerson Leandro Silva, Maria L. D. C. Silveira, Angelo R.F. Pipi, Marina Piacenti Silva, Aroldo G. Magdalena

引用次数: 0

Investigation of Quality of Propolis Acquired in Minas Gerais 米纳斯吉拉斯州蜂胶质量调查

Revista Virtual de Química Pub Date : 2023-01-01 DOI: 10.21577/1984-6835.20230054

Maria Cristina Marcucci, Adriana Melo, Mara Junqueira Carneiro, Paulo Cesar Pires Rosa

引用次数: 0

Recent Advances in the Application of Green Solvents Derived from Natural Sources in Organic Synthesis 天然绿色溶剂在有机合成中的应用进展

Revista Virtual de Química Pub Date : 2023-01-01 DOI: 10.21577/1984-6835.20230014

Julia Rosa Menezes, Maria Eduarda Candido Thedy, Mylena Mendes Gularte, Juliano Braun Azeredo

引用次数: 0

Advanced Glycation End Products Inhibitors from Talisia esculenta 来自山菖蒲的高级糖基化终产物抑制剂

Revista Virtual de Química Pub Date : 2023-01-01 DOI: 10.21577/1984-6835.20230019

Natália Felix Alves, Dayane Castro Ribeiro, H. Mannochio-Russo, Suzana Aparecida Silva Queiroz, G. Zocolo, V. da Silva Bolzani, M. Valli

引用次数: 1

The Science Developed by Young Researchers in Brazil – Part 1 巴西青年研究人员开发的科学-第一部分

Revista Virtual de Química Pub Date : 2023-01-01 DOI: 10.21577/1984-6835.20230023

Vanessa Nascimento, H. Mannochio-Russo, A. Pilon, Aldo Sena de Oliveira

引用次数: 0