Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry最新文献

A Novel Approach to a Recurrent Fuzzy Logic Controller Design Applied to Systems with Multiple Disturbances 应用于多重干扰系统的循环模糊逻辑控制器设计新方法

Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry Pub Date : 2024-05-21 DOI: 10.55815/428834

José Cruz Múñoz-Esparza, J. Jaime-Leal

引用次数: 0

ChemBioEng IQS Talks 化学生物工程 IQS 讲座

Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry Pub Date : 2024-05-21 DOI: 10.55815/428911

Roser Escudé

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Synthesis and characterization of Ionic liquid supported on Zeolitic Imidazolate Framework-8 (ZIF-8) as a highly effective additive for visbreaking of petroleum vacuum bottom 以沸石咪唑酸盐框架-8 (ZIF-8) 为支撑的离子液体的合成与表征，作为石油真空底层破粘的高效添加剂

Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry Pub Date : 2024-05-21 DOI: 10.55815/428833

Ali Asghar Pasban, Alireza Asghari, A. A. Miran Beigi, M. Rajabi

{"title":"Synthesis and characterization of Ionic liquid supported on Zeolitic Imidazolate Framework-8 (ZIF-8) as a highly effective additive for visbreaking of petroleum vacuum bottom","authors":"Ali Asghar Pasban, Alireza Asghari, A. A. Miran Beigi, M. Rajabi","doi":"10.55815/428833","DOIUrl":"https://doi.org/10.55815/428833","url":null,"abstract":"In this present work, a zeolitic imidazolate framework, ZIF-8, an oil-soluble long chain Ionic Liquids, [OMIM][NTf2], was separately synthesized and characterized. Ex-situ preparation of [OMIM][NTf2]-ZIF8 (IL@ZIF8) nanostructures were performed solvothermal, and the products were specified by the several techniques including XRD, FESEM, H-NMR, FTIR, TGA and N2 adsorption-desorption. The products were evaluated as a highly effective material in visbreaking process of petroleum vacuum bottoms (PVBs). To best our knowledge, no was reported in survey on the literature for MOFs as conversion enhancer and viscosity modifier in a visbreaking process especially for atmospheric pressure and elevated temperatures of 375 -400 °C during maximum 120 min. Injection of a little amount of the synthesized products to PVBs caused to produce gaseous compounds, naphtha, middle distillates, lubricating oil and tar. However, viscosity measurement results revealed that IL@ZIF8 was ideally suited for viscosity reduction of PVBs up to 321% after cracking and conversion of PVBs to its distillates up to 1400%. Catalytic upgrading with IL@ZIF-8 also yielded a liquid with 50% light hydrocarbon without any further coke formation.","PeriodicalId":263806,"journal":{"name":"Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry","volume":"72 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141113898","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

The Juliá-Colonna Reaction: A Phase-Transfer Catalyzed Enantioselective Olefin Epoxidation 朱利亚-科隆纳反应：相转移催化的不对称烯烃环氧化反应

Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry Pub Date : 2024-05-21 DOI: 10.55815/428767

Rosa Ma Claramunt, Concepción López, Dolores Santa María, J. Elguero

引用次数: 0

Coagulant and flocculant effect of Opuntia ficus-indica in water treatment Opuntia ficus-indica 在水处理中的混凝剂和絮凝剂作用

Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry Pub Date : 2024-05-21 DOI: 10.55815/428768

Andrés Gaviria-Bedoya, A. Rubio-Clemente

引用次数: 0

Optimization of parameters affecting the recovery in the analysis of polycyclic aromatic hydrocarbons in natural waters by HPLC-fluorescence 用高效液相色谱-荧光法分析天然水体中的多环芳烃时影响回收率的参数的优化

Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry Pub Date : 2024-05-21 DOI: 10.55815/428773

Rosa Amaro, Norielys Herrera, Katya Reategui

{"title":"Optimization of parameters affecting the recovery in the analysis of polycyclic aromatic hydrocarbons in natural waters by HPLC-fluorescence","authors":"Rosa Amaro, Norielys Herrera, Katya Reategui","doi":"10.55815/428773","DOIUrl":"https://doi.org/10.55815/428773","url":null,"abstract":"To improve the recovery percentages in the analysis of PAH (polycyclic aromatic hydrocarbons) in natural waters, parameters such as standard stability, filtration, storage time and matrix effect were optimized for five PAH by HPLC-FD. For aqueous standards, with the addition of 10% acetonitrile, good linearity was found for naphthalene, acenaphthene, anthracene, pyrene, and chrysene curves up to the second day of standards preparation. In filtration, the best results were obtained using the AP10 and Nylon filters with 10% acetonitrile, with recovery ranges of 98-72% and 93-56%, respectively. In contrast, lower values were obtained with cellulose filters in a polyethylene holder without the addition of 10% acetonitrile with recoveries of 52-0%. A 23 factorial design established, for natural water, that the most important factors were: storage time for naphthalene and acenaphthene, with area losses at 48 hours and the use of organic solvent for anthracene, pyrene and chrysene, with area gain for 20 % acetonitrile. For liquid-liquid extraction in standards, recoveries of 62-45% were found in aqueous matrix without acetonitrile and 98-35% with 20% acetonitrile + 2.5% NaCl, at 24 hours of preparation.","PeriodicalId":263806,"journal":{"name":"Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry","volume":"14 23","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141118573","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

Efficient and Convenient One-pot Synthesis of Quinoxalines Promoted by Schiff base dioxomolybdenum(VI) complex 在希夫碱二氧钼（VI）络合物的促进下高效便捷地一步法合成喹喔啉类化合物

Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry Pub Date : 2024-05-21 DOI: 10.55815/428769

Jingjing Xie, Qingmin Yan, Hang Wei, Yingying Zhang, Bin Sun, Gang Liu, Weili Wang

引用次数: 0

Essential oil from Senecio rudbeckiifolius Meyen & Walp.: Chemical analysis, antioxidant assessment, and literature review of Senecio essential oils Senecio rudbeckiifolius Meyen & Walp：番泻叶精油的化学分析、抗氧化评估和文献综述

Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry Pub Date : 2023-12-20 DOI: 10.55815/422402

Leoncio Solís-Quispe, Jorge A. Pino, Ciro Tomaylla-Cruz, Jorge A. Solís-Quispe, Luz J. Aragón-Alencastre

{"title":"Essential oil from Senecio rudbeckiifolius Meyen & Walp.: Chemical analysis, antioxidant assessment, and literature review of Senecio essential oils","authors":"Leoncio Solís-Quispe, Jorge A. Pino, Ciro Tomaylla-Cruz, Jorge A. Solís-Quispe, Luz J. Aragón-Alencastre","doi":"10.55815/422402","DOIUrl":"https://doi.org/10.55815/422402","url":null,"abstract":"Species of the genus Senecio have the largest medicinal value for the Andes communities, and studies on the biological activities attributed to them are scarce. Among them, Senecio rudbeckiifolius Meyen & Walp. is used in decoction for rheumatic affection and skin allergies. The chemical composition and antioxidant activity of the leaf essential oil from plants grown in the Peruvian Andes were studied. Eighty compounds were identified in the essential oil. Monoterpene hydrocarbons had the major percentage (91.4%), followed by oxygenated monoterpenes (4.2%). The most abundant compounds were myrcene (23.4%), b-phellandrene (17.1%), sabinene (15.1%) and limonene (11.7%). In addition, the possible applicability of volatile metabolites for revealing taxonomic/evolutionary relationships among Senecio species was explored. Antioxidant activity were examined using 1,1-diphenyl-2-picryl-hydrazyl and ferric reducing antioxidant power assays. The essential oil had a moderate scavenging effect and it showed ferric reducing activity.","PeriodicalId":263806,"journal":{"name":"Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry","volume":"16 23","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138955263","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

Determination of the toxic metabolite aflatoxin M1 in raw, pasteurized and ultra-pasteurized milks comparing the ELISA Technique and High Performance Liquid Chromatography. 比较 ELISA 技术和高效液相色谱法测定生奶、巴氏杀菌奶和超巴氏杀菌奶中的有毒代谢物黄曲霉毒素 M1。

Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry Pub Date : 2023-12-20 DOI: 10.55815/422377

María Fernanda Uguña Rosas, José Guillermo Vidal Vidal, Juana María Cabrera Quito, Luisa Mayra Vera Cabezas

{"title":"Determination of the toxic metabolite aflatoxin M1 in raw, pasteurized and ultra-pasteurized milks comparing the ELISA Technique and High Performance Liquid Chromatography.","authors":"María Fernanda Uguña Rosas, José Guillermo Vidal Vidal, Juana María Cabrera Quito, Luisa Mayra Vera Cabezas","doi":"10.55815/422377","DOIUrl":"https://doi.org/10.55815/422377","url":null,"abstract":"Aflatoxins are very potent toxic metabolites with carcinogenic, teratogenic, mutagenic, hepatotoxic and immunosuppressive effects, which constitute a potential risk to human health, so they should be considered as a latent problem that requires continuous examination in order to ensure food quality. This study was carried out with the objective of quantitatively determining the content of Aflatoxin M1 in three types of raw, pasteurized and ultrapasteurized milk consumed in the city of Cuenca-Ecuador, through thecomparative analysis of the High Performance Liquid Chromatography HPLC Techniques, after an extraction process in immunoaffinity columns and the ELISA Technique. Eighty-four samples were analyzed in three types of milk: raw, pasteurized and ultra-pasteurized, with the ELISA technique, none exceeded the detection limit of Aflatoxin M1(125 ppt or 0.125 ppb), established both by the national INEN: 9-10 in force and the parameters established by the Food and Agriculture Organization of the United Nations, Food and Drug Administration of the United States (0.5ppb) and with the High Performance Liquid Chromatography technique, 16 positive samples were found that were between the limit of detection and quantification (0.09 - 0.18 ppb.), obtaining a prevalenceof 19%, so that the High Performance Liquid Chromatography technique is more sensitive in the quantitative detection of the toxic metabolite Aflatoxin M1 in milk.","PeriodicalId":263806,"journal":{"name":"Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry","volume":"115 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138958410","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

“Automated Glycan Assembly Enables the Glycoscience” lecture by Dr. Peter Seeberger at IQS "Peter Seeberger 博士在 IQS 举办的讲座 "自动糖装配促进了糖科学的发展

Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry Pub Date : 2023-12-20 DOI: 10.55815/422412

Antoni Planas

引用次数: 0