Base de dados : MEDLINE
Pesquisa : D01.045.250.875.800 [Categoria DeCS]
Referências encontradas : 2208 [refinar]
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  1 / 2208 MEDLINE  
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[PMID]:28450249
[Au] Autor:Kurt A; Toker OS; Tornuk F
[Ad] Endereço:Department of Food Engineering, Engineering Faculty, Ondokuz Mayis University, 55139, Samsun, Turkey; Department of Food Engineering, Engineering and Architecture Faculty, Bitlis Eren University, 13000 Bitlis, Turkey. Electronic address: abdullahkurt48@gmail.com.
[Ti] Título:Effect of xanthan and locust bean gum synergistic interaction on characteristics of biodegradable edible film.
[So] Source:Int J Biol Macromol;102:1035-1044, 2017 Sep.
[Is] ISSN:1879-0003
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:The present study was aimed to use different combinations of xanthan (XG) and locust bean gum (LBG) in the biodegradable edible film preparation by benefitting from their synergistic interactions for the first time. Concentrations of LBG, XG and glycerol of the optimized film sample were found to be 89.6%, 10.4% and 20%, respectively. At the optimum point the WVP, TS, E% and EM values of film were found 0.22gmmh m kPa, 86.97MPa, 33.34% and 177.25MPa, respectively. The optimized film was characterized for its physical, thermal and structural behavior. The scanning electron microscopy (SEM), X-ray diffraction (XRD), differential scanning calorimetry (DSC) and fourier transform infrared spectroscopy (FTIR) analyses exhibited miscibility and presence of interaction between polymers. In conclusion, XG and LBG interaction was used successfully to get biodegradable films and coatings with improved characteristics.
[Mh] Termos MeSH primário: Materiais Biocompatíveis/química
Galactanos/química
Mananas/química
Gomas Vegetais/química
Polissacarídeos Bacterianos/química
Embalagem de Produtos
[Mh] Termos MeSH secundário: Materiais Biocompatíveis/metabolismo
Composição de Medicamentos
Glicerol/química
Fenômenos Mecânicos
Permeabilidade
Reologia
Vapor
Temperatura Ambiente
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Biocompatible Materials); 0 (Galactans); 0 (Mannans); 0 (Plant Gums); 0 (Polysaccharides, Bacterial); 0 (Steam); PDC6A3C0OX (Glycerol); TTV12P4NEE (xanthan gum); V4716MY704 (locust bean gum)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170429
[St] Status:MEDLINE


  2 / 2208 MEDLINE  
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[PMID]:28450246
[Au] Autor:Günes S; Tihminlioglu F
[Ad] Endereço:Graduate Program of Biogineering, Izmir Institute of Technology, Izmir, 35430, Turkey.
[Ti] Título:Hypericum perforatum incorporated chitosan films as potential bioactive wound dressing material.
[So] Source:Int J Biol Macromol;102:933-943, 2017 Sep.
[Is] ISSN:1879-0003
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Recent studies in wound dressing applications offer new therapies and promote wound healing process. The aim of this study was to develop Hypericum perforatum (St John's Wort) oil incorporated chitosan films for wound dressing applications. H. perforatum oil as a potential therapeutic agent was encapsulated in chitosan film to achieve a better wound dressing material. Oil incorporated chitosan films were successfully prepared by solvent casting method in different oil concentrations (0.25-1.5%v/v). Water vapor permeability (WVP), mechanical test, swelling behavior and surface hydrophobicity were performed in order to characterize the prepared films. Antimicrobial test was performed by disc diffusion method and the growth inhibition effects of the films including different amount of H. perforatum oil were investigated on Escherichia coli and Staphylococcus aureus. WVP increased with oil incorporation and the highest value was obtained for 0.25% oil concentration.The highest strain value was obtained in 0.25% oil content films although tensile stress decreased with increasing oil content. H. perforatum oil incorporated films had antimicrobial effect on both microorganisms. Chitosan based films had no cytotoxic effects on NIH3T3fibroblast cells and provided a good surface for cell attachment and proliferation. The results showed that the H. perforatum incorporated chitosan films seems to be a potential and novel biomaterial for wound healing applications.
[Mh] Termos MeSH primário: Bandagens
Materiais Biocompatíveis/química
Materiais Biocompatíveis/farmacologia
Quitosana/química
Hypericum/química
Óleos Vegetais/química
Cicatrização
[Mh] Termos MeSH secundário: Animais
Anti-Infecciosos/química
Anti-Infecciosos/farmacologia
Bandagens/microbiologia
Adesão Celular/efeitos dos fármacos
Proliferação Celular/efeitos dos fármacos
Sobrevivência Celular/efeitos dos fármacos
Fenômenos Mecânicos
Camundongos
Células NIH 3T3
Permeabilidade
Vapor
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anti-Infective Agents); 0 (Biocompatible Materials); 0 (Plant Oils); 0 (Steam); 9012-76-4 (Chitosan)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170429
[St] Status:MEDLINE


  3 / 2208 MEDLINE  
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[PMID]:28503942
[Au] Autor:Wang ZD; Li LH; Xia H; Wang F; Yang LG; Wang SK; Sun GJ
[Ad] Endereço:a Key Laboratory of Environmental Medicine and Engineering of Ministry of Education, and Department of Nutrition & Food Hygiene, School of Public Health , Southeast University , Nanjing , China.
[Ti] Título:Optimisation of steam distillation extraction oil from onion by response surface methodology and its chemical composition.
[So] Source:Nat Prod Res;32(1):112-115, 2018 Jan.
[Is] ISSN:1478-6427
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Oil extraction from onion was performed by steam distillation. Response surface methodology was applied to evaluate the effects of ratio of water to raw material, extraction time, zymolysis temperature and distillation times on yield of onion oil. The maximum extraction yield (1.779%) was obtained as following conditions: ratio of water to raw material was 1, extraction time was 2.5 h, zymolysis temperature was 36° and distillation time was 2.6 h. The experimental values agreed well with those predicted by regression model. The chemical composition of extracted onion oil under the optimum conditions was analysed by gas chromatography-mass spectrometry technology. The results showed that sulphur compounds, like alkanes, sulphide, alkenes, ester and alcohol, were the major components of onion oil.
[Mh] Termos MeSH primário: Destilação/métodos
Cebolas/química
Óleos Vegetais/isolamento & purificação
Sulfetos/isolamento & purificação
[Mh] Termos MeSH secundário: Cromatografia Gasosa-Espectrometria de Massas
Óleos Vegetais/química
Vapor
Sulfetos/química
Temperatura Ambiente
Água
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Plant Oils); 0 (Steam); 0 (Sulfides); 059QF0KO0R (Water); 4P3VLD98FL (onion oil)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180301
[Lr] Data última revisão:
180301
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170516
[St] Status:MEDLINE
[do] DOI:10.1080/14786419.2017.1327863


  4 / 2208 MEDLINE  
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[PMID]:28873566
[Au] Autor:Dadan M; Rybak K; Wiktor A; Nowacka M; Zubernik J; Witrowa-Rajchert D
[Ad] Endereço:Department of Food Engineering and Process Management, Faculty of Food Sciences, Warsaw University of Life Sciences, Nowoursynowska 159c, 02-776 Warsaw, Poland. Electronic address: magdalena_dadan@sggw.pl.
[Ti] Título:Selected chemical composition changes in microwave-convective dried parsley leaves affected by ultrasound and steaming pre-treatments - An optimization approach.
[So] Source:Food Chem;239:242-251, 2018 Jan 15.
[Is] ISSN:0308-8146
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Parsley leaves contain a high amount of bioactive components (especially lutein), therefore it is crucial to select the most appropriate pre-treatment and drying conditions, in order to obtain high quality of dried leaves, which was the aim of this study. The optimization was done using response surface methodology (RSM) for the following factors: microwave power (100, 200, 300W), air temperature (20, 30, 40°C) and pre-treatment variant (ultrasound, steaming and dipping as a control). Total phenolic content (TPC), antioxidant activity, chlorophyll and lutein contents (using UPLC-PDA) were determined in dried leaves. The analysed responses were dependent on the applied drying parameters and the pre-treatment type. The possibility of ultrasound and steam treatment application was proven and the optimal processing conditions were selected.
[Mh] Termos MeSH primário: Petroselinum
[Mh] Termos MeSH secundário: Micro-Ondas
Fenóis
Folhas de Planta
Vapor
Ultrassom
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Phenols); 0 (Steam)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171128
[Lr] Data última revisão:
171128
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170907
[St] Status:MEDLINE


  5 / 2208 MEDLINE  
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[PMID]:28869123
[Au] Autor:Katsimpouras C; Zacharopoulou M; Matsakas L; Rova U; Christakopoulos P; Topakas E
[Ad] Endereço:Industrial Biotechnology & Biocatalysis Group, School of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou Str., Zografou Campus, Athens 15780, Greece.
[Ti] Título:Sequential high gravity ethanol fermentation and anaerobic digestion of steam explosion and organosolv pretreated corn stover.
[So] Source:Bioresour Technol;244(Pt 1):1129-1136, 2017 Nov.
[Is] ISSN:1873-2976
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The present work investigates the suitability of pretreated corn stover (CS) to serve as feedstock for high gravity (HG) ethanol production at solids-content of 24wt%. Steam explosion, with and without the addition of H SO , and organosolv pretreated CS samples underwent a liquefaction/saccharification step followed by simultaneous saccharification and fermentation (SSF). Maximum ethanol concentration of ca. 76g/L (78.3% ethanol yield) was obtained from steam exploded CS (SECS) with 0.2% H SO . Organosolv pretreated CS (OCS) also resulted in high ethanol concentration of ca. 65g/L (62.3% ethanol yield). Moreover, methane production through anaerobic digestion (AD) was conducted from fermentation residues and resulted in maximum methane yields of ca. 120 and 69mL/g volatile solids (VS) for SECS and OCS samples, respectively. The results indicated that the implementation of a liquefaction/saccharification step before SSF employing a liquefaction reactor seemed to handle HG conditions adequately.
[Mh] Termos MeSH primário: Etanol
Fermentação
[Mh] Termos MeSH secundário: Explosões
Hipergravidade
Vapor
Zea mays
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Steam); 3K9958V90M (Ethanol)
[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:170905
[St] Status:MEDLINE


  6 / 2208 MEDLINE  
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[PMID]:28849871
[Au] Autor:Singh M; Singh M; Jaiswal N; Chauhan A
[Ad] Endereço:Department of Pediatrics, Post Graduate Institute of Medical Education and Research, Sector 12, Chandigarh, India, 160012.
[Ti] Título:Heated, humidified air for the common cold.
[So] Source:Cochrane Database Syst Rev;8:CD001728, 2017 08 29.
[Is] ISSN:1469-493X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Heated, humidified air has long been used by people with the common cold. The theoretical basis is that steam may help congested mucus drain better and that heat may destroy the cold virus as it does in vitro. This is an update of a review last published in 2013. OBJECTIVES: To assess the effects of inhaling heated water vapour (steam) in the treatment of the common cold by comparing symptoms, viral shedding, and nasal resistance. SEARCH METHODS: We searched the Cochrane Central Register of Controlled Trials (CENTRAL) (to February 2017), MEDLINE (1966 to 24 February 2017), Embase (1990 to 24 February 2017), and Current Contents (1998 to 24 February 2017). We also searched World Health Organization International Clinical Trials Registry Platform (WHO ICTRP) (8 March 2017) and ClinicalTrials.gov (8 March 2017) as well as reference lists of included studies. SELECTION CRITERIA: Randomised controlled trials using heated water vapour in participants with the common cold or experimentally induced common cold were eligible for inclusion. DATA COLLECTION AND ANALYSIS: We used standard methodological procedures expected by Cochrane. Three review authors independently screened titles and abstracts for inclusion of potential studies identified from the search. We recorded the selection process in sufficient detail to complete a PRISMA flow diagram. We used a data collection form for study characteristics and outcome data that was developed and used for previous versions of this review. Two review authors independently extracted data, and a third review author resolved any disagreements. We used Review Manager 5 software to analyse data. MAIN RESULTS: We included six trials from five publications involving a total of 387 participants. We included no new studies in this 2017 update. The 'Risk of bias' assessment suggested an unclear risk of bias in the domain of randomisation and a low risk of bias in performance, detection, attrition, and reporting.It was uncertain whether heated, humidified air provides symptomatic relief for the common cold, as the fixed-effect analysis showed evidence of an effect (odds ratio (OR) 0.30, 95% confidence interval (CI) 0.16 to 0.56; 2 studies, 149 participants), but the random-effects analysis showed no significant difference in the results (OR 0.22, 95% CI 0.03 to 1.95). There is an argument for using either form of analysis. No studies demonstrated an exacerbation of clinical symptom scores. One study conducted in the USA demonstrated worsened nasal resistance, but an earlier Israeli study showed improvement. One study examined viral shedding in nasal washings, finding no significant difference between treatment and placebo groups (OR 0.47, 95% CI 0.04 to 5.19). As judged by the subjective response to therapy (i.e. therapy did not help), the number of participants reporting resolution of symptoms was not significantly higher in the heated humidified group (OR 0.58, 95% CI 0.28 to 1.18; 2 studies, 124 participants). There was significant heterogeneity in the effects of heated, humidified air on different outcomes, therefore we graded the quality of the evidence as low. Some studies reported minor adverse events (including discomfort or irritation of the nose). AUTHORS' CONCLUSIONS: The current evidence does not show any benefits or harms from the use of heated, humidified air delivered via the RhinoTherm device for the treatment of the common cold. There is a need for more double-blind, randomised trials that include standardised treatment modalities.
[Mh] Termos MeSH primário: Ar
Resfriado Comum/terapia
Terapia Respiratória/métodos
Vapor
[Mh] Termos MeSH secundário: Resfriado Comum/virologia
Calefação
Seres Humanos
Umidade
Infecções por Picornaviridae/terapia
Ensaios Clínicos Controlados Aleatórios como Assunto
Rhinovirus/fisiologia
Vapor/efeitos adversos
Eliminação de Partículas Virais
[Pt] Tipo de publicação:JOURNAL ARTICLE; META-ANALYSIS; RESEARCH SUPPORT, NON-U.S. GOV'T; REVIEW
[Nm] Nome de substância:
0 (Steam)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170920
[Lr] Data última revisão:
170920
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170830
[St] Status:MEDLINE
[do] DOI:10.1002/14651858.CD001728.pub6


  7 / 2208 MEDLINE  
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[PMID]:28847085
[Au] Autor:Lizasoain J; Trulea A; Gittinger J; Kral I; Piringer G; Schedl A; Nilsen PJ; Potthast A; Gronauer A; Bauer A
[Ad] Endereço:AlpS-GmbH, Centre for Climate Change Adaptation Technologies, Grabenweg 68, A-6010 Innsbruck, Austria; University of Natural Resources and Life Sciences, Vienna, Department of Sustainable Agricultural Systems, Institute of Agricultural Engineering, Konrad-Lorenz-Strasse 24, A-3430 Tulln, Austria.
[Ti] Título:Corn stover for biogas production: Effect of steam explosion pretreatment on the gas yields and on the biodegradation kinetics of the primary structural compounds.
[So] Source:Bioresour Technol;244(Pt 1):949-956, 2017 Nov.
[Is] ISSN:1873-2976
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:This study evaluated the effect of steam explosion on the chemical composition and biomethane potential of corn stover using temperatures ranging between 140 and 220°C and pretreatment times ranging between 2 and 15min. Biodegradation kinetics during the anaerobic digestion of untreated and corn stover, pretreated at two different intensities, 140°C for 5min and 180°C for 5min, were studied in tandem. Results showed that pretreatment at 160°C for 2min improved the methane yield by 22%. Harsher pretreatment conditions led to lower hemicellulose contents and methane yields, as well as higher lignin contents, which may be due to the formation of pseudo-lignin. The biodegradation kinetics trial demonstrated that steam explosion enhances the degradation of structural carbohydrates and acid insoluble lignin.
[Mh] Termos MeSH primário: Biocombustíveis
Vapor
[Mh] Termos MeSH secundário: Explosões
Cinética
Lignina
Zea mays
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Biofuels); 0 (Steam); 9005-53-2 (Lignin)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171023
[Lr] Data última revisão:
171023
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170830
[St] Status:MEDLINE


  8 / 2208 MEDLINE  
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[PMID]:28822282
[Au] Autor:Boboescu IZ; Gélinas M; Beigbeder JB; Lavoie JM
[Ad] Endereço:Department of Chemical Engineering and Biotechnology Engineering, Université de Sherbrooke, Sherbrooke, Québec, Canada. Electronic address: Iulian-zoltan.boboescu@usherbrooke.ca.
[Ti] Título:A two-step optimization strategy for 2nd generation ethanol production using softwood hemicellulosic hydrolysate as fermentation substrate.
[So] Source:Bioresour Technol;244(Pt 1):708-716, 2017 Nov.
[Is] ISSN:1873-2976
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Ethanol production using waste biomass represents a very attractive approach. However, there are considerable challenges preventing a wide distribution of these novel technologies. Thus, a fractional-factorial screening of process variables and Saccharomyces cerevisiae yeast inoculum conditions was performed using a synthetic fermentation media. Subsequently, a response-surface methodology was developed for maximizing ethanol yields using a hemicellulosic solution generated through the chemical hydrolysis of steam treatment broth obtained from residual softwood biomass. In addition, nutrient supplementation using starch-based ethanol production by-products was investigated. An ethanol yield of 74.27% of the theoretical maximum was observed for an initial concentration of 65.17g/L total monomeric sugars. The two-step experimental strategy used in this work represents the first successful attempt to developed and use a model to make predictions regarding the optimal ethanol production using both softwood feedstock residues as well as 1st generation ethanol production by-products.
[Mh] Termos MeSH primário: Etanol
Fermentação
Saccharomyces cerevisiae
[Mh] Termos MeSH secundário: Hidrólise
Vapor
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Steam); 3K9958V90M (Ethanol)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171106
[Lr] Data última revisão:
171106
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170820
[St] Status:MEDLINE


  9 / 2208 MEDLINE  
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[PMID]:28805458
[Au] Autor:Ceylan E; McMahon W; Garren DM
[Ad] Endereço:1 Mérieux NutriSciences, 3600 Eagle Nest Drive, Crete, Illinois 60417; and.
[Ti] Título:Thermal Inactivation of Listeria monocytogenes and Salmonella during Water and Steam Blanching of Vegetables.
[So] Source:J Food Prot;80(9):1550-1556, 2017 Sep.
[Is] ISSN:1944-9097
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Thermal inactivation of Listeria monocytogenes and Salmonella was evaluated on peas, spinach, broccoli, potatoes, and carrots that were treated with hot water and steam. One gram-positive bacterium, L. monocytogenes, and one gram-negative bacterium, Salmonella, were selected as pertinent human pathogens for evaluation. Samples were inoculated with a composite of five strains each of L. monocytogenes and Salmonella to achieve approximately 10 to 10 CFU/g. Inoculated samples were treated with hot water at 85 and 87.8°C and with steam at 85 and 96.7°C for up to 3.5 min. A greater than 5-log reduction of L. monocytogenes and Salmonella was achieved on all products within 0.5 min by hot water blanching at 85 and 87.8°C. Steam blanching at 85°C reduced Salmonella populations by greater than 5 log on spinach and peas within 2 min and on carrots and broccoli within 3.5 min. Populations of Salmonella were reduced by more than 5 log within 1 min on carrot, spinach, and broccoli and within 2 min on peas by steam blanching at 96.7°C. Steam blanching at 85°C reduced L. monocytogenes populations by more than 5 log on carrots and spinach within 2 min and on broccoli and peas within 3.5 min. L. monocytogenes populations were reduced more than 5 log within 1 min on carrot, spinach, peas and broccoli by steam blanching at 96.7°C. Longer treatment times and higher temperatures were required for steam-blanched samples than for samples blanched with hot water. Results suggest that hot water and steam blanching practices commonly used by the frozen vegetable industry will achieve the desired 5-log lethality of L. monocytogenes and Salmonella and will enhance microbiological safety prior to freezing.
[Mh] Termos MeSH primário: Manipulação de Alimentos/métodos
Conservação de Alimentos/métodos
Listeria monocytogenes/crescimento & desenvolvimento
Salmonella/crescimento & desenvolvimento
Verduras/microbiologia
[Mh] Termos MeSH secundário: Contagem de Colônia Microbiana
Contaminação de Alimentos/análise
Contaminação de Alimentos/prevenção & controle
Microbiologia de Alimentos
Temperatura Alta
Seres Humanos
Vapor
Água
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Steam); 059QF0KO0R (Water)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171102
[Lr] Data última revisão:
171102
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170815
[St] Status:MEDLINE
[do] DOI:10.4315/0362-028X.JFP-16-517


  10 / 2208 MEDLINE  
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[PMID]:28787110
[Au] Autor:Jahandar Lashaki M; Ziaei-Azad H; Sayari A
[Ad] Endereço:Centre for Catalysis Research and Innovation (CCRI), Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, K1N 6N5, Canada.
[Ti] Título:Insights into the Hydrothermal Stability of Triamine-Functionalized SBA-15 Silica for CO Adsorption.
[So] Source:ChemSusChem;10(20):4037-4045, 2017 Oct 23.
[Is] ISSN:1864-564X
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:The hydrothermal stability of triamine-grafted, large-pore SBA-15 CO adsorbents was studied by using steam stripping. Following two 3 h cycles of steam regeneration, lower CO uptakes, lower CO /N ratios, and slower adsorption kinetics were observed relative to fresh samples, particularly at the lowest adsorption temperature (25 °C). CO adsorption measurements for a selected sample exposed to 48 h of steam stripping depicted that after the initial loss during the first exposure to steam (3-6 h), the adsorptive properties stabilized. For higher adsorption temperatures (i.e., 50 and 75 °C), however, all adsorptive properties remained almost unchanged after steaming, indicating the significance of diffusional limitations. Thermogravimetric analysis and FTIR spectroscopy on grafted samples before and after steam stripping showed no amine leaching and no change in the chemical nature of the amine groups, respectively. Also, a six-cycle CO adsorption/desorption experiment under dry conditions showed no thermal degradation. However, N adsorption measurement at 77 K showed significant reductions in the BET surface area of the grafted samples following steaming. Based on the pore size distribution of calcined, grafted samples before and after steaming, it is proposed that exposure to steam restructured the grafted materials, causing mass transfer resistance. It is inferred that triamine-grafted, large-pore SBA-15 adsorbents are potential candidates for CO capture at relatively high temperatures (50-75 °C; for example, flue gas) combined with steam regeneration.
[Mh] Termos MeSH primário: Aminas/química
Dióxido de Carbono/química
Dióxido de Silício/química
Temperatura Ambiente
[Mh] Termos MeSH secundário: Adsorção
Vapor
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Amines); 0 (SBA-15); 0 (Steam); 142M471B3J (Carbon Dioxide); 7631-86-9 (Silicon Dioxide)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171106
[Lr] Data última revisão:
171106
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170809
[St] Status:MEDLINE
[do] DOI:10.1002/cssc.201701439



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