Revista Colombiana de Quimica最新文献_第8页

Preparación, caracterización y aplicación de sensores de Pd-SnO como nariz electrónica en la clasificación de vinos peruanos y su comparación con técnicas cromatográficas Pd-SnO传感器作为电子鼻在秘鲁葡萄酒分类中的制备、表征和应用，以及与色谱技术的比较

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Revista Colombiana de Quimica Pub Date : 2018-04-01 DOI: 10.15446/REV.COLOMB.QUIM.V47N1.63070

Ana Lucía Paredes Doig, Rosario Sun Kou, Gino Picasso, E. Camino, A. Gómez

{"title":"Preparación, caracterización y aplicación de sensores de Pd-SnO como nariz electrónica en la clasificación de vinos peruanos y su comparación con técnicas cromatográficas","authors":"Ana Lucía Paredes Doig, Rosario Sun Kou, Gino Picasso, E. Camino, A. Gómez","doi":"10.15446/REV.COLOMB.QUIM.V47N1.63070","DOIUrl":"https://doi.org/10.15446/REV.COLOMB.QUIM.V47N1.63070","url":null,"abstract":"SnO-based sensors doped with palladium (0, 1, 3, 5 and 7%) were prepared by the wet impregnation method. To characterize them, the techniques of infrared spectroscopy with Fourier transform (FTIR), adsorption and desorption of N2 (BET), XRD, scanning electron microscopy (SEM), and X-ray dispersive energy (EDX) spectroscopy were used. The sensors were evaluated with ethanol to form, together with two commercial sensors, an electronic nose (E-nose) that could detect volatile aroma components in Peruvian wines. The results were interpreted through principal component analysis (PCA) to find a technique that complemented the information collected by gas chromatography (GC) and liquid chromatography (HPLC), and by comparing the PCAs obtained from GC and HPLC with those resulting from E-nose. It was found that the latter classified the samples better. It was possible to differentiate both wines from the same grape and from a different strain, and to detect adulterated wines, which contributes to the wine industry in controlling its production to improve the quality of this drink for the consumer.","PeriodicalId":43662,"journal":{"name":"Revista Colombiana de Quimica","volume":"47 1","pages":"41-49"},"PeriodicalIF":0.8,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15446/REV.COLOMB.QUIM.V47N1.63070","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67056339","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: 1

Método cualitativo rápido (screening) para la detección de residuos de plaguicidas en frutas y hortalizas 水果和蔬菜中农药残留的快速定性(筛选)检测方法

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Revista Colombiana de Quimica Pub Date : 2018-04-01 DOI: 10.15446/REV.COLOMB.QUIM.V47N1.62240

Iván Mauricio Huérfano Barco, J. A. G. Dallos

引用次数: 0

Ensayo de migración global en empaques para alimentos: evaluación de patrones internos alternativos 食品包装的全球迁移测试:替代内部模式的评估

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Revista Colombiana de Quimica Pub Date : 2018-01-01 DOI: 10.15446/REV.COLOMB.QUIM.V47N1.63859

Edgar Andres Avendaño Florez, Elianna Castillo Serna, Diana Cristina Sinuco León

引用次数: 2

Preparative method to obtain ursolic acid from Clinopodium revolutum 从羊角草中制备熊果酸的制备方法

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Revista Colombiana de Quimica Pub Date : 2018-01-01 DOI: 10.15446/REV.COLOMB.QUIM.V47N1.65375

M. Huamán

引用次数: 2

Transamidación y transamidación-reducción de N-benciltiramina con DMF DMF的n-苄基酪胺转胺和转胺还原

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Revista Colombiana de Quimica Pub Date : 2018-01-01 DOI: 10.15446/REV.COLOMB.QUIM.V47N1.63976

Christian Díaz Oviedo, Ariel Rodolfo Quevedo Pastor

引用次数: 0

Synthesis, characterization, X-ray crystal structure and DFT calculations of 4-([2,2':6',2''-terpyridin]- 4'-yl)phenol 4-([2,2':6'，2 " -三联吡啶]- 4'-基)苯酚的合成、表征、x射线晶体结构和DFT计算

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Revista Colombiana de Quimica Pub Date : 2018-01-01 DOI: 10.15446/REV.COLOMB.QUIM.V47N1.66281

César A. Sierra, Brian Castro Agudelo, Cristian Ochoa‐Puentes, William Rodríguez-Córdoba, A. Reiber

{"title":"Synthesis, characterization, X-ray crystal structure and DFT calculations of 4-([2,2':6',2''-terpyridin]- 4'-yl)phenol","authors":"César A. Sierra, Brian Castro Agudelo, Cristian Ochoa‐Puentes, William Rodríguez-Córdoba, A. Reiber","doi":"10.15446/REV.COLOMB.QUIM.V47N1.66281","DOIUrl":"https://doi.org/10.15446/REV.COLOMB.QUIM.V47N1.66281","url":null,"abstract":"The synthesis of new terpyridine (Tpy) derivatives has been subject of extensive research due to its potential as functional materials for solar energy conversion, among other applications. In this contribution, the 4-([2,2':6',2''-terpyridin]-4'-yl)phenol (TpyOH) has been synthesized, characterized and studied through several methods, including X-ray crystallography and computational approaches. Single crystal X-ray structure analysis shows that TpyOH is essentially planar, with dihedral angles of about 5.03° between the central pyridinyl and the phenolic ring, and also 6.05 and 12.2° in the terpyridine moiety. In the crystal, molecules are linked by intermolecular hydrogen bonds and through π-π stacking interactions. Using a time-dependent density functional theory approach and taking into account bulk solvent effects, the absorption and fluorescence spectra of TpyOH were investigated and compared. The TD-DFT S0 → Sn and S1 → S0 transition energies are in good agreement with experimental results. The frontier molecular orbitals analysis showed that the low-energy absorption band has an intraligand charge transfer character (ICT), while the high-energy band is a common feature of π-π* transitions of the Tpy moiety. The S1→S0 emission transition also has an ICT character, with a 90% contribution from the HOMO→LUMO transitions.","PeriodicalId":43662,"journal":{"name":"Revista Colombiana de Quimica","volume":"47 1","pages":"77-85"},"PeriodicalIF":0.8,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67056655","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: 3

Diseño experimental para determinar el efecto del tamaño del pellet de catalizadores bimetálicos Cu-Ni en la reacción de desplazamiento de agua 测定双金属铜镍催化剂颗粒大小对水置换反应的影响的实验设计

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Revista Colombiana de Quimica Pub Date : 2018-01-01 DOI: 10.15446/REV.COLOMB.QUIM.V47N1.64699

Oscar Felipe Arbeláez Pérez, Víctor Ignacio López Ríos, Aída Luz Villa Holguín, Adriana Patricia Villegas Quiceno

引用次数: 3

Diseño y producción de diversas proteínas fusión de la nicotinamida/nicotinato mononucleótido adenilil transferasa (NMNAT) de Plasmodium falciparum

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Revista Colombiana de Quimica Pub Date : 2017-09-01 DOI: 10.15446/REV.COLOMB.QUIM.V46N3.63492

C. Clavijo, Nicolás Forero Baena, Marializ Magaly Ramírez Hernández

{"title":"Diseño y producción de diversas proteínas fusión de la nicotinamida/nicotinato mononucleótido adenilil transferasa (NMNAT) de Plasmodium falciparum","authors":"C. Clavijo, Nicolás Forero Baena, Marializ Magaly Ramírez Hernández","doi":"10.15446/REV.COLOMB.QUIM.V46N3.63492","DOIUrl":"https://doi.org/10.15446/REV.COLOMB.QUIM.V46N3.63492","url":null,"abstract":"Recombinant proteins have become useful tools in biochemistry research. During their production, however, inclusion bodies (IB) appear, on the one hand, due to the high expression rate from the recombinant plasmids, which have high efficiency promoters, and, on the other hand, intrinsic characteristics of the expressed protein. Furhtermore, the nicotinamide/nicotinate mononucleotide adenilyl transferase (NMNAT) is a central protein in NAD(H)+ biosynthesis, an essential cofactor in cell metabolism, and in protozoon parasite has been studied. To study the NMNAT protein of these parasites, their recombinant version in E. coli has been expressed, getting a great quantity of IB as a by-product. To increase the solubility of the protein, the coding sequence of the NMNAT enzyme of Plasmodium falciparum was cloned in different expression plasmids which were subsequently transformed into E. coli BL21(DE3) expression strain. The solubility of the recombinant proteins was assessed and the one with the highest presence in the soluble fraction was subsequently purified and its enzyme activity was determined. The recombinant protein with a MBP (maltose-binding protein) tag showed an increased solubility and purity.","PeriodicalId":43662,"journal":{"name":"Revista Colombiana de Quimica","volume":"46 1","pages":"5-10"},"PeriodicalIF":0.8,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44286460","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: 1

Nanopartículas de CuO y su propiedad antimicrobiana en cepas intrahospitalarias 纳米氧化铜及其对医院内菌株的抗菌性能

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Revista Colombiana de Quimica Pub Date : 2017-09-01 DOI: 10.15446/REV.COLOMB.QUIM.V46N3.62386

L. Román, F. Castro, D. Maurtua, C. Condori, Darwin Vivas, A. E. Bianchi, F. Paraguay-Delgado, J. Solís, M. M. Gómez

引用次数: 4

Synthesis of acyl-hydrazone from usnic acid and isoniazid and its anti-Mycobacterium tuberculosis activity usnic酸和异烟肼合成酰基腙及其抗结核分枝杆菌活性

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Revista Colombiana de Quimica Pub Date : 2017-09-01 DOI: 10.15446/REV.COLOMB.QUIM.V46N3.61980

Melissa Barrera Tomas, Gloria Eva Tomas Chota, Patricia Sheen Cortavarría, Patricia Fuentes Bonilla, Miguel Angel Inocente Camones, J. Contreras

引用次数: 7