Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry最新文献_第2页

Obtaining nanocomposites based on recycled polystyrene from urban solid waste with carbon nanostructures: graphene oxide and multi-wall carbon nanotubes, modified with organic acids 用有机酸改性从城市固体废弃物中回收的聚苯乙烯与碳纳米结构（氧化石墨烯和多壁碳纳米管）获得纳米复合材料

Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry Pub Date : 2023-12-20 DOI: 10.55815/422405

Jonathan Emmanuel De la Peña-González, J. J. Cedillo-Portillo, R. I. Narro-Céspedes, A. Castañeda-Facio, Aidé Sáenz Galindo

{"title":"Obtaining nanocomposites based on recycled polystyrene from urban solid waste with carbon nanostructures: graphene oxide and multi-wall carbon nanotubes, modified with organic acids","authors":"Jonathan Emmanuel De la Peña-González, J. J. Cedillo-Portillo, R. I. Narro-Céspedes, A. Castañeda-Facio, Aidé Sáenz Galindo","doi":"10.55815/422405","DOIUrl":"https://doi.org/10.55815/422405","url":null,"abstract":"The excessive use of polystyrene has caused great environmental problems at a global level, an alternative to reduce this problem is recycling, in order to obtain new products from waste, so the objective of this manuscript is to obtain nanocomposites (NCs) from recycled polystyrene with the integration of graphene oxide (OG) and multiple walled carbon nanotubes (NTCPM) previously modified with benzoic acid at concentrations of 0.33 and 5% respectively. Low toxicity solvent was used. The materials obtained were characterized by infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and light microscopy, finding by FTIR that the chemical structure of the polystyrene was not affected after the integration of the nanostructures and processing, which suggests that they are maintained the properties, regarding the optical micrographs, it can be observed that the NCs with the modified nanostructures presented a homogeneous dispersion, with respect to the thermogravimetric analysis, they increased 27 ° C in thermal stability.","PeriodicalId":263806,"journal":{"name":"Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry","volume":"44 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138957332","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

Ecology treatment of a real industrial effluent with chitosan: Characterization and design of coagulation-flocculation process 用壳聚糖对实际工业废水进行生态处理：混凝-絮凝工艺的特性和设计

Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry Pub Date : 2023-12-20 DOI: 10.55815/422668

M. I. Delletesse, María Cielo Pompei, G. N. Eyler, Rosa K. Nesprias

引用次数: 0

Effect of pressure in the filtration operation on the suspension to be purified of Furvina 过滤操作中的压力对芙芙娜悬浮液净化的影响

Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry Pub Date : 2023-12-20 DOI: 10.55815/422407

María Isabel Díaz Molina, Ana Rosa Brito Martínez, Luis Andrés Gómez Rodríguez, Isleidy de la Caridad Ruiz Pérez, Elizabeth Cepero Rodríguez

{"title":"Effect of pressure in the filtration operation on the suspension to be purified of Furvina","authors":"María Isabel Díaz Molina, Ana Rosa Brito Martínez, Luis Andrés Gómez Rodríguez, Isleidy de la Caridad Ruiz Pérez, Elizabeth Cepero Rodríguez","doi":"10.55815/422407","DOIUrl":"https://doi.org/10.55815/422407","url":null,"abstract":"The influence of pressure on the filtration operation of the Furvina suspension is studied. From the established suspension volume, the average amount of Furvina, alcohol, and carbon to be used is determined. The experiments were carried out in a range of initial pressure values of 44 139.65 Pa and 91 712.37 Pa to determine the filtrate volume and filtration time. The density of Furvina 0.73 g/ mL and the viscosity of the filtrate suspension of Furvina, 7.931x10-4 Pa.s, physical properties not previously determined and essential to determine the resistance of the filter medium (Rm) and the specific resistance of the cake (α) at different pressure values, are determined. It is concluded that the cake is compressible because its specific resistance (α) increases from 1.083x1012 m/kgto 2.15085x1012 m/kg with increasing pressure, which is demonstrated by the MANN-WHITNEY U analysis of variance, not having the same behavior on the filter media resistance (Rm). At pressures of 49033.26 Pa and 88259.87 Pa, the performance of the operation is 60.74 % and 74.34 % respectively, which shows an increase in performance for each batch and a decrease in the impact on the environment.","PeriodicalId":263806,"journal":{"name":"Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry","volume":"37 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138954568","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

Synthesis of Poly(methylmethacrylate-cobutylacrylate) Nanocompounds and Silver Nanoparticles Using Sustainable Method 用可持续方法合成聚（甲基丙烯酸甲酯-丙烯酸丁酯）纳米化合物和纳米银粒子

Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry Pub Date : 2023-12-20 DOI: 10.55815/422379

P. F. Vera-García, L. Faías-Cepeda, S. Vázquez-Rodríguez, P. Acuna-Vazquez, R. Díaz de León, A. Sáenz Galindo, A. Castañeda-Facio

{"title":"Synthesis of Poly(methylmethacrylate-cobutylacrylate) Nanocompounds and Silver Nanoparticles Using Sustainable Method","authors":"P. F. Vera-García, L. Faías-Cepeda, S. Vázquez-Rodríguez, P. Acuna-Vazquez, R. Díaz de León, A. Sáenz Galindo, A. Castañeda-Facio","doi":"10.55815/422379","DOIUrl":"https://doi.org/10.55815/422379","url":null,"abstract":"Nanocomposites of poly(methylmethacrylate-cobutylacrylate) P(MMA-co-BuA) and silver nanoparticles (NPsAg) synthesized with extracts of O. ficus-indica (OFI) and A. vera (AV) were obtained by using microwaves. The nanocomposites were synthesized by “in situ” emulsion polymerization, where different concentrations of NPsAg (0.05, 0.1, 0.5 and 1%) with respect to the polymer were studied. Films were formed from the latex, which were characterized by different techniques. Using UV-Vis, the characteristic absorbance of the surface plasmon resonance of the NPsAg in the nanocomposite was observed in the range of 415-436 nm. The thermal stability of the nanocomposites was carried out using TGA, where it was observed that the higher the concentration of NPsAg, the lower thethermal stability. The DSC results showed that the glass transition temperatures (Tg) for the nanocomposites with nanoparticles are between 8 and 12ºC. The percentage elongation of the nanocomposites was 400%, in addition, the Young’s modulus and the tensile strength of the same were determined, observing that the higher the content of NPsAg, the lower the elastic behavior and the mechanical resistance of the nanocomposites. Using SEM, it was confirmed that the NPsAg maintain a spherical morphology. Finally, using FTIR, the possible interaction between the PMMA-Co-BuA copolymer and the NPsAg was determined.","PeriodicalId":263806,"journal":{"name":"Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry","volume":"124 28","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138994542","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

Thickening capacity of Cordia lutea Lam mucilage gum in a liquid soap formulation 黄豆胶在液体肥皂配方中的增稠能力

Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry Pub Date : 2023-08-24 DOI: 10.55815/418005

Walter Quezada Moreno, Edwin Cevallos Carvajal, Marcia Yomara Proaño, Reina Medina Litardo, Paola Mariela Proaño, Walter Quezada Torres, Mauro Caicedo Álvarez, Carmen Muñoz López

{"title":"Thickening capacity of Cordia lutea Lam mucilage gum in a liquid soap formulation","authors":"Walter Quezada Moreno, Edwin Cevallos Carvajal, Marcia Yomara Proaño, Reina Medina Litardo, Paola Mariela Proaño, Walter Quezada Torres, Mauro Caicedo Álvarez, Carmen Muñoz López","doi":"10.55815/418005","DOIUrl":"https://doi.org/10.55815/418005","url":null,"abstract":"The study refers to the use of Cordia lutea Lam gum as a natural thickener in a liquid soap formulation. The aim was to determine the phytochemical components and the thickening capacity of mucilage gum in a liquid soap formula. The color of the fruit and the mucilage gum were determined by CIELab methodology, the phytochemical screening of the mucilage gum extracted by manual pressure, by rapid chemical reactions. The hydrocarbons were determined by gas chromatography and the viscosity using a rotational viscometer. Liquid soap was made according to a commercial formula using a DCA design along with the factors amount of mucilage and Texapon at two levels (low and high) and viscosity and foam formation that were used as response variables. The thickening effect of the mucilage gum in the soap was evidenced through the viscosity (mPa.s) and foaming capacity by the test tube method; those variables were tabulated using the statistical software statgraphics plus. Phytochemical results showed the presence of saponins, quinones, carotenoids and coumarins; and hydrocarbon compounds: tetratriacontane (34,28%), n-hexadecanoic acid (28,74%) and 9-12-15-Octadecatrienoic acid (18,19%). The viscosity of the mucilage gum was greater than 14000 mPa.s and that of the liquid soap that ranged from 1931 to 2822 mPa.s. The pH was 6,5 to 6,8 and the foaming was comparatively higher than commercial products. The mucilage gum obtained constitutes a natural thickener with an important projection of immediate application in the pharmaceutical and cosmetic industries.","PeriodicalId":263806,"journal":{"name":"Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123445165","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

Caracterización de cortes de perforación contaminados con diésel y su tratamiento 柴油污染钻井剖面的特征及其处理

Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry Pub Date : 2023-08-24 DOI: 10.55815/417972

Roberto Romero Silva, Miguel Ángel Díaz Díaz, Claudia Chao Reyes, Jennifer Martinez González, Yaima Barrios San Martín

{"title":"Caracterización de cortes de perforación contaminados con diésel y su tratamiento","authors":"Roberto Romero Silva, Miguel Ángel Díaz Díaz, Claudia Chao Reyes, Jennifer Martinez González, Yaima Barrios San Martín","doi":"10.55815/417972","DOIUrl":"https://doi.org/10.55815/417972","url":null,"abstract":"La introducción de nuevas formulaciones de fluidos de perforación en la extracción del crudo en Cuba, requiere contar con metodologías ambientales viables, de bajos costos y facilidades de manejo, para evitar el impacto negativo del almacenamiento de grandes cantidades de residuos peligrosos sin disposición final. El nivel de contaminación de los cortes de perforación impregnados con fluido, depende del tipo de lodo que se use y de las condiciones existentes en el lugar donde se encuentra el pozo. El objetivo del presente trabajo fue caracterizar los cortes de perforación contaminados con diésel y su tratamiento. Para determinar su composición se utilizaron métodos standards establecidos. Se realizó un proceso químico-biológico a escala de banco, mediante la utilización de sulfato de calcio y la aplicación de la biorremediación para el tratamiento de cortes de perforación contaminados con combustible diésel. Adicionalmente se utilizó un producto a base de acondicionadores orgánicos con alta carga de nutrientes. Se lograron alcanzar niveles de concentración por debajo de la normativa de referencia. El tratamiento aplicado permitió alcanzar porcientos de remoción en el proceso de 68 % grasas y aceites y 71 % hidrocarburos totales, respectivamente.","PeriodicalId":263806,"journal":{"name":"Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120936148","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

Minimum inhibitory but maximum non-hemolytic concentration of Larrea tridentata and Origanum vulgare extracts 三叶草和牛耳草提取物的最小抑制浓度和最大非溶血浓度

Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry Pub Date : 2023-08-24 DOI: 10.55815/418007

Francisco Javier Alonso Montemayor, M. D. Dávila Medina, Alejandro Zugasti Cruz, Maria de Lourdes Guillen Cisneros, Rosa Idala Narro Céspedes, María Guadalupe Neira Velázquez, Aidé SÁENZ GALINDO, Brenda Jaritzi Juárez Corona

{"title":"Minimum inhibitory but maximum non-hemolytic concentration of Larrea tridentata and Origanum vulgare extracts","authors":"Francisco Javier Alonso Montemayor, M. D. Dávila Medina, Alejandro Zugasti Cruz, Maria de Lourdes Guillen Cisneros, Rosa Idala Narro Céspedes, María Guadalupe Neira Velázquez, Aidé SÁENZ GALINDO, Brenda Jaritzi Juárez Corona","doi":"10.55815/418007","DOIUrl":"https://doi.org/10.55815/418007","url":null,"abstract":"Larrea tridentata and Origanum vulgare extracts are used in popular medicine to obtain antibacterial compounds to combat bacterial infections. Although the antibacterial activity of L. tridentata and O. vulgare extracts has been reported, hemolytic activity needs to be studied for therapeutic application. This work hypothesized minimum inhibitory but non-hemolytic concentration (MIC-NH) for L. tridentata and O. vulgare extracts. Thus, this study aimed to obtain non-hemolytic crude extracts with antibacterial activity. It was estimated that the MIC-NH of L. tridentata and O. vulgare extracts against the Staphylococcus aureus strain, an important skin pathogen bacterium, were 100 and 75 μg mL-1, respectively. Thus, these in vitro-tested extracts prevented the S. aureus strain growth without provoking hemolysis if the extract concentration was less or equal to the MIC-NH. At the same time, it was determined by gas chromatography coupled with mass spectroscopy that bis-ethylhexyl-phthalate, catechol, encecalinol, isopropyl cinnamate, phenol, guaiacine, and NDGA were antibacterial compounds in the L. tridentata extracts. Meanwhile, for O. vulgare extracts, these compounds were cymene, terpinene, thymol, carvacrol, cimendiol, hexadecanoic acid, bis-ethylhexyl-phthalate, and sitosterol. The findings of this research work must encourage the development of potential biomaterial coatings to replace conventional ones.","PeriodicalId":263806,"journal":{"name":"Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry","volume":" 20","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120828408","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

Relationships between the structural characteristic of curcumins that affect cell proliferation of hepatocarcinoma cells 姜黄素结构特征与肝癌细胞增殖的关系

Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry Pub Date : 2023-08-24 DOI: 10.55815/417980

R. Ramírez-Tagle, L. Alvarado-Soto, J. Santibañez, C. Echeverria

引用次数: 0

An easy and convenient approach to novel diarypyrrole-2-carbaldehydes 一种制备新型二硝基吡咯-2-乙醛的简便方法

Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry Pub Date : 2023-08-24 DOI: 10.55815/417975

S. Aslam, Aroog Fatima, Noreen Aslam, Miraj Fatima, M. Naeem Khan, Gilberto Alves Romeiro, Munawar Ali Munawar, Misbahul Ain Khan

引用次数: 0

Adsorption of 2,4-dichlorophenoxyacetic acid (2,4D) on sargassum activated carbon 马尾藻活性炭对2,4-二氯苯氧乙酸(2,4d)的吸附

Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry Pub Date : 2023-08-24 DOI: 10.55815/417977

Omar Paíno Perdomo, L. E. Rodríguez de Francisco, J. Aceituno, Yeray Álvarez Galván, Nicolás Brehm, C. Yacou, S. Gaspard, Michel Manduca-Artiles, Andy Machín Garriga, U. Jáuregui-Haza

引用次数: 0