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  1 / 2064 MEDLINE  
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[PMID]:28456653
[Au] Autor:Dening TJ; Rao S; Thomas N; Prestidge CA
[Ad] Endereço:School of Pharmacy and Medical Sciences, University of South Australia, City East Campus, Adelaide, South Australia 5001, Australia.
[Ti] Título:Montmorillonite-lipid hybrid carriers for ionizable and neutral poorly water-soluble drugs: Formulation, characterization and in vitro lipolysis studies.
[So] Source:Int J Pharm;526(1-2):95-105, 2017 Jun 30.
[Is] ISSN:1873-3476
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Lipid-based formulations (LBFs) are a popular strategy for enhancing the gastrointestinal solubilization and absorption of poorly water-soluble drugs. In light of this, montmorillonite-lipid hybrid (MLH) particles, composed of medium-chain triglycerides, lecithin and montmorillonite clay platelets, have been developed as a novel solid-state LBF. Owing to the unique charge properties of montmorillonite, whereby the clay platelet surfaces carry a permanent negative charge and the platelet edges carry a pH-dependent charge, three model poorly water-soluble drugs with different charge properties; blonanserin (weak base, pKa 7.7), ibuprofen (weak acid, pKa 4.5) and fenofibrate (neutral), were formulated as MLH particles and their performance during biorelevant in vitro lipolysis at pH 7.5 was investigated. For blonanserin, drug solubilization during in vitro lipolysis was significantly reduced 3.4-fold and 3.2-fold for MLH particles in comparison to a control lipid solution and silica-lipid hybrid (SLH) particles, respectively. It was hypothesized that strong electrostatic interactions between the anionic montmorillonite platelet surfaces and cationic blonanserin molecules were responsible for the inferior performance of MLH particles. In contrast, no significant influence on drug solubilization was observed for ibuprofen- and fenofibrate-loaded MLH particles. The results of the current study indicate that whilst MLH particles are a promising novel formulation strategy for poorly water-soluble drugs, drug ionization tendency and the potential for drug-clay interactions must be taken into consideration to ensure an appropriate performance.
[Mh] Termos MeSH primário: Bentonita/química
Portadores de Fármacos/química
Lipídeos/química
[Mh] Termos MeSH secundário: Química Farmacêutica
Lipólise
Solubilidade
Água
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Drug Carriers); 0 (Lipids); 059QF0KO0R (Water); 1302-78-9 (Bentonite)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180104
[Lr] Data última revisão:
180104
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170501
[St] Status:MEDLINE


  2 / 2064 MEDLINE  
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[PMID]:28910343
[Au] Autor:Liang X; Liao C; Soupir ML; Jarboe LR; Thompson ML; Dixon PM
[Ad] Endereço:Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, Iowa, United States of America.
[Ti] Título:Escherichia coli attachment to model particulates: The effects of bacterial cell characteristics and particulate properties.
[So] Source:PLoS One;12(9):e0184664, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:E. coli bacteria move in streams freely in a planktonic state or attached to suspended particulates. Attachment is a dynamic process, and the fraction of attached microorganisms is thought to be affected by both bacterial characteristics and particulate properties. In this study, we investigated how the properties of cell surfaces and stream particulates influence attachment. Attachment assays were conducted for 77 E. coli strains and three model particulates (ferrihydrite, Ca-montmorillonite, or corn stover) under environmentally relevant conditions. Surface area, particle size distribution, and total carbon content were determined for each type of particulate. Among the three particulates, attachment fractions to corn stover were significantly larger than the attachments to 2-line ferrihydrite (p-value = 0.0036) and Ca-montmorillonite (p-value = 0.022). Furthermore, attachment to Ca-montmorillonite and corn stover was successfully modeled by a Generalized Additive Model (GAM) using cell characteristics as predictor variables. The natural logarithm of the net charge on the bacterial surface had a significant, positive, and linear impact on the attachment of E. coli bacteria to Ca-montmorillonite (p-value = 0.013), but it did not significantly impact the attachment to corn stover (p-value = 0.36). The large diversities in cell characteristics among 77 E. coli strains, particulate properties, and attachment fractions clearly demonstrated the inadequacy of using a static parameter or linear coefficient to predict the attachment behavior of E. coli in stream water quality models.
[Mh] Termos MeSH primário: Aderência Bacteriana
Escherichia coli/fisiologia
[Mh] Termos MeSH secundário: Algoritmos
Sítios de Ligação Microbiológicos
Bentonita
Tamanho da Partícula
Propriedades de Superfície
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
1302-78-9 (Bentonite)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171013
[Lr] Data última revisão:
171013
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170915
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0184664


  3 / 2064 MEDLINE  
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[PMID]:28820086
[Au] Autor:Sánchez-Castro I; Ruiz-Fresneda MA; Bakkali M; Kämpfer P; Glaeser SP; Busse HJ; López-Fernández M; Martínez-Rodríguez P; Merroun ML
[Ad] Endereço:1​Departamento de Microbiología, Campus de Fuentenueva, Universidad de Granada, 18071 Granada, Spain.
[Ti] Título:Stenotrophomonas bentonitica sp. nov., isolated from bentonite formations.
[So] Source:Int J Syst Evol Microbiol;67(8):2779-2786, 2017 Aug.
[Is] ISSN:1466-5034
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A Gram-stain negative, rod-shaped, aerobic bacterial strain, BII-R7T, was isolated during a study targeting the culture-dependent microbial diversity occurring in bentonite formations from southern Spain. Comparative 16S rRNA gene sequence analysis showed that BII-R7T represented a member of the genus Stenotrophomonas (class Gammaproteobacteria), and was related most closely to Stenotrophomonas rhizophila e-p10T (99.2 % sequence similarity), followed by Stenotrophomonas pavanii ICB 89T (98.5 %), Stenotrophomonas maltophilia IAM 12423T, Stenotrophomonas chelatiphaga LPM-5T and Stenotrophomonas tumulicola T5916-2-1bT (all 98.3 %). Pairwise sequence similarities to all other type strains of species of the genus Stenotrophomonas were below 98 %. Genome-based calculations (orthologous average nucleotide identity, original average nucleotide identity, genome-to-genome distance and DNA G+C percentage) indicated clearly that the isolate represents a novel species within this genus. Different phenotypic analyses, such as the detection of a quinone system composed of the major compound ubiquinone Q-8 and a fatty acid profile with iso-C15 : 0 and anteiso-C15 : 0 as major components, supported this finding at the same time as contributing to a comprehensive characterization of BII-R7T. Based on this polyphasic approach comprising phenotypic and genotypic/molecular characterization, BII-R7T can be differentiated clearly from its phylogenetic neighbours, establishing a novel species for which the name Stenotrophomonas bentonitica sp. nov. is proposed with BII-R7T as the type strain (=LMG 29893T=CECT 9180T=DSM 103927T).
[Mh] Termos MeSH primário: Bentonita
Stenotrophomonas/classificação
[Mh] Termos MeSH secundário: Técnicas de Tipagem Bacteriana
Composição de Bases
DNA Bacteriano/genética
Ácidos Graxos/química
Hibridização de Ácido Nucleico
Filogenia
RNA Ribossômico 16S/genética
Análise de Sequência de DNA
Espanha
Stenotrophomonas/genética
Stenotrophomonas/isolamento & purificação
Ubiquinona/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Bacterial); 0 (Fatty Acids); 0 (RNA, Ribosomal, 16S); 1302-78-9 (Bentonite); 1339-63-5 (Ubiquinone); CQA993F7P8 (ubiquinone 8)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170918
[Lr] Data última revisão:
170918
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170819
[St] Status:MEDLINE
[do] DOI:10.1099/ijsem.0.002016


  4 / 2064 MEDLINE  
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[PMID]:28771153
[Au] Autor:Naghizadeh A; Gholami K
[Ad] Endereço:Medical Toxicology and Drug Abuse Research Center (MTDRC), Birjand University of Medical Sciences (BUMS), Birjand, Iran and Social Determinants of Health Research Center, Faculty of Health, Birjand University of Medical Sciences, Birjand, Iran E-mail: al.naghizadeh@yahoo.com; aliinaghizadeh@gmail.com; Department of Environmental Health Engineering, Faculty of Health, Birjand University of Medical Sciences, Birjand, Iran.
[Ti] Título:Bentonite and montmorillonite nanoparticles effectiveness in removal of fluoride from water solutions.
[So] Source:J Water Health;15(4):555-565, 2017 Aug.
[Is] ISSN:1477-8920
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The aim of this study was to evaluate the effectiveness of montmorillonite and bentonite nanoparticles in removal of fluoride from water solutions. This experimental study has been conducted in batch condition in which the effects of different parameters such as contact time, pH, initial concentration of fluoride and amount of adsorbent mass have been investigated. Finally thermodynamics, isotherm and kinetics of the both adsorbents have been studied. The maximum adsorption capacity for both adsorbents occurred at fluoride concentration of 20 mg/L, contact times of 60 minutes, pH = 3 and adsorbent mass of 0.25 g/L. The adsorption process was exothermic and the result of the Langmuir and Freundlich isotherm study show that bentonite nanoparticles behave more similar to the Langmuir isotherm model and montmorillonite nanoparticles behave according to the both isotherms. Furthermore, the adsorption of fluoride by bentonite in all studied fluoride concentrations and montmorillonite in higher fluoride concentrations followed pseudo second-order kinetics.
[Mh] Termos MeSH primário: Bentonita/química
Fluoretos/química
Nanopartículas/química
Poluentes Químicos da Água/química
Purificação da Água/métodos
[Mh] Termos MeSH secundário: Adsorção
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Water Pollutants, Chemical); 1302-78-9 (Bentonite); Q80VPU408O (Fluorides)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171103
[Lr] Data última revisão:
171103
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170804
[St] Status:MEDLINE
[do] DOI:10.2166/wh.2017.052


  5 / 2064 MEDLINE  
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[PMID]:28768106
[Au] Autor:Wang M; Maki CR; Deng Y; Tian Y; Phillips TD
[Ad] Endereço:Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University , College Station, Texas 77845, United States.
[Ti] Título:Development of High Capacity Enterosorbents for Aflatoxin B1 and Other Hazardous Chemicals.
[So] Source:Chem Res Toxicol;30(9):1694-1701, 2017 Sep 18.
[Is] ISSN:1520-5010
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Previously, a calcium montmorillonite clay (NovaSil) included in the diet of animals has been shown to bind aflatoxin B1 (AfB1) and reduce the symptoms of aflatoxicosis. To investigate and improve the capacity and efficacy of clay-based materials as aflatoxin sorbents, we developed and tested calcium and sodium montmorillonite clays amended with nutrients including l-carnitine and choline. Also, we determined the sorption of AfB1 by isothermal analysis and tested the ability of these amended sorbents to protect adult hydra from AfB1 toxicity. The results showed that exchanging montmorillonite clays with l-carnitine and choline inhibited swelling of the clays and increased the sorption capacity and efficacy of clay surfaces for AfB1. Results from dehydroxylated and heat-collapsed clays suggested that AfB1 was primarily adsorbed in the clay interlayer, as predicted from thermodynamic calculations and computational modeling. The hydra bioassay further indicated that the modified clays can significantly protect adult hydra from AfB1 with as low as 0.005% clay inclusion. This enterosorbent therapy may also be applied to screen hazardous chemicals such as pesticides and PAHs based on similar sorption mechanisms. Taken together, enterosorbent therapy could be delivered in nutritional supplements, foods that are vulnerable to aflatoxin contamination, flavored liquids and animal feeds during emergencies and outbreaks of acute aflatoxicosis, and as a screening model for hazardous environmental chemicals.
[Mh] Termos MeSH primário: Aflatoxina B1/química
Silicatos de Alumínio/química
Substâncias Perigosas/química
[Mh] Termos MeSH secundário: Adsorção
Animais
Bentonita/química
Carnitina/química
Colina/química
Dieta
Contaminação de Alimentos/análise
Modelos Moleculares
Termodinâmica
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Aluminum Silicates); 0 (Hazardous Substances); 1302-78-9 (Bentonite); 1302-87-0 (clay); 9N2N2Y55MH (Aflatoxin B1); N91BDP6H0X (Choline); S7UI8SM58A (Carnitine)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:171016
[Lr] Data última revisão:
171016
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170803
[St] Status:MEDLINE
[do] DOI:10.1021/acs.chemrestox.7b00154


  6 / 2064 MEDLINE  
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[PMID]:28687034
[Au] Autor:Tangaraj V; Janot JM; Jaber M; Bechelany M; Balme S
[Ad] Endereço:Institut Européen des Membranes, UMR 5635, Université de Montpellier, ENSCM, CNRS, Place Eugène Bataillon, F-34095 Montpellier Cedex 5, France.
[Ti] Título:Adsorption and photophysical properties of fluorescent dyes over montmorillonite and saponite modified by surfactant.
[So] Source:Chemosphere;184:1355-1361, 2017 Oct.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:In the present study, the adsorption capacities of two intercalated smectites, CTAB-saponite and CTAB-montmorillonite with a cationic surfactant, were investigated with three fluorescent dyes namely Rhodamine 640 perchlorate rhodamine (Rho), sulforhodamine B (SR) and Kiton red 620 (KR). The adsorption isotherms fit well with the non-linear Langmuir isotherm model and the maximum adsorption capacities of all the composites are determined. The photophysical properties such as anisotropy and fluorescence lifetime of all the fluorescent dyes over the clay materials are determined. The set of experimental data based on X-Ray diffraction (XRD), transmission electron microscopy (TEM), Thermal analysis (TG-DTA) and fluorescence measurements allow highlighting the presence or the absence of interactions between the dyes and the modified clay minerals.
[Mh] Termos MeSH primário: Silicatos de Alumínio/química
Bentonita/química
Corantes Fluorescentes/química
Tensoativos/química
[Mh] Termos MeSH secundário: Adsorção
Microscopia Eletrônica de Transmissão
Rodaminas
Silicatos
Difração de Raios X
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Aluminum Silicates); 0 (Fluorescent Dyes); 0 (Rhodamines); 0 (Silicates); 0 (Surface-Active Agents); 1302-78-9 (Bentonite); 1302-87-0 (clay); 2609-88-3 (lissamine rhodamine B); 66732-77-2 (saponite); A3N5ZCN45C (Smectite)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171024
[Lr] Data última revisão:
171024
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170709
[St] Status:MEDLINE


  7 / 2064 MEDLINE  
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[PMID]:28687030
[Au] Autor:Zhao S; Jia H; Nulaji G; Gao H; Wang F; Wang C
[Ad] Endereço:Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics & Chemistry, Chinese Academy of Sciences, Urumqi 830011, China.
[Ti] Título:Photolysis of polycyclic aromatic hydrocarbons (PAHs) on Fe -montmorillonite surface under visible light: Degradation kinetics, mechanism, and toxicity assessments.
[So] Source:Chemosphere;184:1346-1354, 2017 Oct.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Photochemical behavior of various polycyclic aromatic hydrocarbons (PAHs) on Fe -modified montmorillonite was explored to determine their potential kinetics, pathways, and mechanism under visible light. Depending on the type of PAH molecules, the transformation rate follows the order of benzo[a]pyrene ≈ anthracene > benzo[a]anthracene > phenanthrene. Quantum simulation results confirm the crucial role of "cation-π" interaction between Fe and PAHs on their transformation kinetics. Primary intermediates, including quinones, ring-opening products and benzene derivatives, were identified by gas chromatography-mass spectrometer (GC-MS), and the possible photodegradation pathway of benzo[a]pyrene was proposed. Meanwhile, radical intermediates, such as reactive oxygen species (ROS) and free organic radicals, were detected by electron paramagnetic resonance (EPR) technique. The photolysis of selected PAHs, such as anthracene and benzo[a]pyrene, on clay surface firstly occurs by electron transfer from PAHs to Fe -montmorillonite, followed by degradation involving photo-induced ROS such as ·OH and ·O . To investigate the acute toxicity of photolysis products, the Microtox toxicity test was performed during the photodegradation processes of various PAHs. As a result, the photo-irradiation initially induces increased toxicity by generating reactive intermediates, such as free organic radicals, and then the toxicity gradually decreases with increasing of reaction time. Overall, the present study provides useful information to understand the fate and photo-transformation of PAHs in contaminated soils.
[Mh] Termos MeSH primário: Fotólise
Hidrocarbonetos Aromáticos Policíclicos/química
[Mh] Termos MeSH secundário: Antracenos
Bentonita/química
Benzo(a)pireno/análise
Benzo(a)pireno/química
Espectroscopia de Ressonância de Spin Eletrônica
Radicais Livres
Cromatografia Gasosa-Espectrometria de Massas
Cinética
Luz
Modelos Químicos
Fenantrenos
Hidrocarbonetos Aromáticos Policíclicos/análise
Testes de Toxicidade
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anthracenes); 0 (Free Radicals); 0 (Phenanthrenes); 0 (Polycyclic Aromatic Hydrocarbons); 1302-78-9 (Bentonite); 3417WMA06D (Benzo(a)pyrene); 448J8E5BST (phenanthrene); EH46A1TLD7 (anthracene)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171024
[Lr] Data última revisão:
171024
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170709
[St] Status:MEDLINE


  8 / 2064 MEDLINE  
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[PMID]:28654836
[Au] Autor:Zhang L; Sun X
[Ad] Endereço:College of Forestry, Beijing Forestry University, Beijing 100083, PR China.
[Ti] Título:Addition of seaweed and bentonite accelerates the two-stage composting of green waste.
[So] Source:Bioresour Technol;243:154-162, 2017 Nov.
[Is] ISSN:1873-2976
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Green waste (GW) is an important recyclable resource, and composting is an effective technology for the recycling of organic solid waste, including GW. This study investigated the changes in physical and chemical characteristics during the two-stage composting of GW with or without addition of seaweed (SW, Ulva ohnoi) (at 0, 35, and 55%) and bentonite (BT) (at 0.0, 2.5%, and 4.5%). During the bio-oxidative phase, the combined addition of SW and BT improved the physicochemical conditions, increased the respiration rate and enzyme activities, and decreased ammonia and nitrous oxide emissions. The combination of SW and BT also enhanced the quality of the final compost in terms of water-holding capacity, porosity, particle-size distribution, water soluble organic carbon/organic nitrogen ratio, humification, nutrient content, and phytotoxicity. The best quality compost, which matured in only 21days, was obtained with 35% SW and 4.5% BT.
[Mh] Termos MeSH primário: Bentonita
Alga Marinha
Resíduos Sólidos
[Mh] Termos MeSH secundário: Nitrogênio
Solo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Soil); 0 (Solid Waste); 1302-78-9 (Bentonite); N762921K75 (Nitrogen)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170628
[St] Status:MEDLINE


  9 / 2064 MEDLINE  
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[PMID]:28651314
[Au] Autor:Yu K; Xu J; Jiang X; Liu C; McCall W; Lu J
[Ad] Endereço:Shanghai Research Institute of Building Sciences Group, Shanghai, 200232, PR China. Electronic address: recarudo@yeah.net.
[Ti] Título:Stabilization of heavy metals in soil using two organo-bentonites.
[So] Source:Chemosphere;184:884-891, 2017 Oct.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Stabilization of Cu, Zn, Cd, Hg, Cr and As in soil using tetramethylammonium (TMA) and dodecyltrimethylammonium (DTMA) modified bentonites (T-Bents and D-Bents) as amendments was investigated. Toxicity characteristic leaching procedure (TCLP) was used to quantify the metal mobility after soil treatment. The structural parameters of modified bentonites, including the BET surface area, basal spacing and zeta potential were obtained as a function of the TMA and DTMA loading at 40, 80, 120, 160 and 200% of the bentonite's cation exchange capacity, respectively. The results indicated that the characteristics of the organo-bentonites fundamentally varied depending on the species and concentration of modifiers loaded on bentonite. T-Bents and D-Bents manifested distinct immobilization effectiveness towards various metals. In association with the organo-bentonite characteristics, the main interactive mechanisms for Cu, Zn and Cd proceeded via cation exchange, Hg proceeded via physical adsorption and partitioning, Cr and As proceeded via specific adsorption and electrostatic attraction, respectively. This study provided operational and mechanistic basis for optimizing the organic clay synthesis and selecting as the appropriate amendment for remediation of heavy metal contaminated soils.
[Mh] Termos MeSH primário: Bentonita/química
Metais Pesados/análise
Poluentes do Solo/análise
Solo/química
[Mh] Termos MeSH secundário: Adsorção
Silicatos de Alumínio
Poluição Ambiental
Recuperação e Remediação Ambiental
Modelos Químicos
Compostos de Amônio Quaternário
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Aluminum Silicates); 0 (Metals, Heavy); 0 (Quaternary Ammonium Compounds); 0 (Soil); 0 (Soil Pollutants); 1302-78-9 (Bentonite); 1302-87-0 (clay); GT3793XV5S (dodecyltrimethylammonium); H0W55235FC (tetramethylammonium)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170628
[St] Status:MEDLINE


  10 / 2064 MEDLINE  
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[PMID]:28622119
[Au] Autor:Shiono T; Yamamoto K; Yotsumoto Y; Yoshida A
[Ad] Endereço:a Research Laboratories for Beverage Technologies, Research & Development Division , Kirin Company, Ltd. , Yokohama , Japan.
[Ti] Título:Caffeine adsorption of montmorillonite in coffee extracts.
[So] Source:Biosci Biotechnol Biochem;81(8):1591-1597, 2017 Aug.
[Is] ISSN:1347-6947
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The growth in health-conscious consumers continues to drive the demand for a wide variety of decaffeinated beverages. We previously developed a new technology using montmorillonite (MMT) in selective decaffeination of tea extract. This study evaluated and compared decaffeination of coffee extract using MMT and activated carbon (AC). MMT adsorbed caffeine without significant adsorption of caffeoylquinic acids (CQAs), feruloylquinic acids (FQAs), dicaffeoylquinic acids (di-CQAs), or caffeoylquinic lactones (CQLs). AC adsorbed caffeine, chlorogenic acids (CGAs) and CQLs simultaneously. The results suggested that the adsorption selectivity for caffeine in coffee extract is higher in MMT than AC. The caffeine adsorption isotherms of MMT in coffee extract fitted well to the Langmuir adsorption model. The adsorption properties in coffee extracts from the same species were comparable, regardless of roasting level and locality of growth. Our findings suggest that MMT is a useful adsorbent in the decaffeination of a wide range of coffee extracts.
[Mh] Termos MeSH primário: Bentonita/química
Cafeína/isolamento & purificação
Coffea/química
Café/química
Extratos Vegetais/química
[Mh] Termos MeSH secundário: Adsorção
Carvão Vegetal/química
Ácidos Cumáricos/química
Cinética
Lactonas/química
Ácido Quínico/análogos & derivados
Ácido Quínico/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (1,3-di-O-feruloylquinic acid); 0 (Coffee); 0 (Coumaric Acids); 0 (Lactones); 0 (Plant Extracts); 0 (caffeoylquinic acid); 058C04BGYI (Quinic Acid); 1302-78-9 (Bentonite); 16291-96-6 (Charcoal); 3G6A5W338E (Caffeine)
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170726
[Lr] Data última revisão:
170726
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170617
[St] Status:MEDLINE
[do] DOI:10.1080/09168451.2017.1340087



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