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Antimicrobial and antioxidant activity and chemical composition of the essential oil of tanacetum macrophyllum (Waldst. et Kit.) schultz. bip. / K. Javidnia in The journal of essential oil research, Vol. 22 N° 2 (Mars/Avril 2010) 

Public ISBD [article]  in The journal of essential oil research > Vol. 22 N° 2 (Mars/Avril 2010) . - pp. 186 - 188 Titre : Antimicrobial and antioxidant activity and chemical composition of the essential oil of tanacetum macrophyllum (Waldst. et Kit.) schultz. bip. Type de document : texte imprimé Auteurs : K. Javidnia, Auteur ; Gholami, M., Auteur ; O. Firuzi, Auteur Année de publication : 2010 Article en page(s) : pp. 186 - 188 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Tanacetum  macrophyllum  Essential  oil  components  Antimicrobial  activity  Antioxidant  activity Index. décimale : 646 Résumé : The essential oil of Tanacetum macrophyllum growing wild in Turkey was obtained by hydrodistillation, and antimicrobial activity of the essential oil was tested against six bacteria and two yeasts including Candida albicans and Aspergillus niger by disc diffusion method. Further the oil of this plant was analyzed by GC and GC/MS technique. Best effect of the oil was against pseudomonas earuginosa. Twenty-eight components, representing 95.6% of the total oil, were identified. The main component of the oil was β-eudesmol (89.5%). The antioxidant activity of the essential oil was measured by the ferric reducing antioxidant power (FRAP) assay. DEWEY : 646 ISSN : 1041-2905 En ligne : http://www.jeoronline.com/archive/detail/50 [article] Antimicrobial and antioxidant activity and chemical composition of the essential oil of tanacetum macrophyllum (Waldst. et Kit.) schultz. bip. [texte imprimé] / K. Javidnia, Auteur ; Gholami, M., Auteur ; O. Firuzi, Auteur . - 2010 . - pp. 186 - 188. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 22 N° 2 (Mars/Avril 2010) . - pp. 186 - 188 Mots-clés : Tanacetum  macrophyllum  Essential  oil  components  Antimicrobial  activity  Antioxidant  activity Index. décimale : 646 Résumé : The essential oil of Tanacetum macrophyllum growing wild in Turkey was obtained by hydrodistillation, and antimicrobial activity of the essential oil was tested against six bacteria and two yeasts including Candida albicans and Aspergillus niger by disc diffusion method. Further the oil of this plant was analyzed by GC and GC/MS technique. Best effect of the oil was against pseudomonas earuginosa. Twenty-eight components, representing 95.6% of the total oil, were identified. The main component of the oil was β-eudesmol (89.5%). The antioxidant activity of the essential oil was measured by the ferric reducing antioxidant power (FRAP) assay. DEWEY : 646 ISSN : 1041-2905 En ligne : http://www.jeoronline.com/archive/detail/50

Investigation of simplifying assumptions in mathematical modeling of natural gas dehydration using adsorption process and introduction of a new accurate LDF model / Gholami, M. in Industrial & engineering chemistry research, Vol. 49 N° 2 (Janvier 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 2 (Janvier 2010) . - pp 838–846 Titre : Investigation of simplifying assumptions in mathematical modeling of natural gas dehydration using adsorption process and introduction of a new accurate LDF model Type de document : texte imprimé Auteurs : Gholami, M., Auteur ; Talaie, M. R., Auteur Année de publication : 2010 Article en page(s) : pp 838–846 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Natural  gas  dehydration  Adsorption  process  LDF  model. Résumé : In this study, a comprehensive mathematical model was developed to investigate the simplifying assumptions in modeling of natural gas dehydration by the adsorption process. In the developed model the variations of pressure, velocity, and temperature along the bed and the temperature changes inside the particles were considered. Convective heat and mass transfer were considered outside the particles and a diffusion mechanism was taken into account for the heat and mass transfer inside the particles. A dual site Langmuir model was selected to predict adsorption equilibrium and the Peng−Robinson equation of state was used to calculate the gas compressibility factor. The experimental data of Mohamadinejad et al. [Mohamadinejad, H.; et al. Sep. Sci. Technol. 2000, 35, 1] was used to verify the model. Good agreement was observed between the predictions of the comprehensive model and the experimental data. The results showed that applying the assumptions of uniform temperature distribution inside the pellet (lump method), thermal equilibrium between gas and particles, and isothermal and isobaric conditions had no significant effects on the predictions. It was also concluded that external mass transfer resistance was negligible at the industrial operating conditions of gas dehydration processes and common linear driving force models (LDFs) were not able to predict the performance of the dehydration bed well. Also, a new accurate correlation was introduced for an LDF proportionality coefficient applicable in gas dehydration systems. The predictions based on the proposed correlation were in good agreement with the results of the comprehensive model. Using this new accurate LDF model instead of diffusion model saves a large amount of CPU time without a loss of accuracy. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901183q [article] Investigation of simplifying assumptions in mathematical modeling of natural gas dehydration using adsorption process and introduction of a new accurate LDF model [texte imprimé] / Gholami, M., Auteur ; Talaie, M. R., Auteur . - 2010 . - pp 838–846. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 2 (Janvier 2010) . - pp 838–846 Mots-clés : Natural  gas  dehydration  Adsorption  process  LDF  model. Résumé : In this study, a comprehensive mathematical model was developed to investigate the simplifying assumptions in modeling of natural gas dehydration by the adsorption process. In the developed model the variations of pressure, velocity, and temperature along the bed and the temperature changes inside the particles were considered. Convective heat and mass transfer were considered outside the particles and a diffusion mechanism was taken into account for the heat and mass transfer inside the particles. A dual site Langmuir model was selected to predict adsorption equilibrium and the Peng−Robinson equation of state was used to calculate the gas compressibility factor. The experimental data of Mohamadinejad et al. [Mohamadinejad, H.; et al. Sep. Sci. Technol. 2000, 35, 1] was used to verify the model. Good agreement was observed between the predictions of the comprehensive model and the experimental data. The results showed that applying the assumptions of uniform temperature distribution inside the pellet (lump method), thermal equilibrium between gas and particles, and isothermal and isobaric conditions had no significant effects on the predictions. It was also concluded that external mass transfer resistance was negligible at the industrial operating conditions of gas dehydration processes and common linear driving force models (LDFs) were not able to predict the performance of the dehydration bed well. Also, a new accurate correlation was introduced for an LDF proportionality coefficient applicable in gas dehydration systems. The predictions based on the proposed correlation were in good agreement with the results of the comprehensive model. Using this new accurate LDF model instead of diffusion model saves a large amount of CPU time without a loss of accuracy. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901183q