Moisture sorption isotherms and heat of sorption of Algerian bay leaves (Laurus nobilis)

ABSTRACT: The moisture sorption isotherms of Algerian bay leaves (Laurus nobilis) were determined experimentally in this work. The equilibrium moisture contents of the leaves were measured at 40, 50, and 60 °C using static gravimetric method. Six mathematical models were tested to fit the experimental data of sorption isotherms and predict the hygroscopic behavior during storage or drying. Peleg model was found to be the best fitting model for describing the sorption curves. The net isosteric heat of sorption was computed from the equilibrium data at different temperatures by applying the integrated form of the Clausius-Clapeyron equation. The net isosteric heat of sorption is inversely proportional to the equilibrium moisture content and is found to be an exponential function of moisture content

Moisture sorption isotherms and heat of sorption of Algerian bay leaves (Laurus nobilis)

The moisture sorption isotherms of Algerian bay leaves (Laurus nobilis) were determined experimentally in this work. The equilibrium moisture contents of the leaves were measured at 40, 50, and 60 °C using static gravimetric method. Six mathematical models were tested to fit the experimental data of sorption isotherms and predict the hygroscopic behavior during storage or drying. Peleg model was found to be the best fitting model for describing the sorption curves. The net isosteric heat of sorption was computed from the equilibrium data at different temperatures by applying the integrated form of the Clausius-Clapeyron equation. The net isosteric heat of sorption is inversely proportional to the equilibrium moisture content and is found to be an exponential function of moisture content

Anti-inflammatory activity of essential oil of an endemic Thymus fontanesii Boiss. & Reut. with chemotype carvacrol, and its healing capacity on gastric lesions

International audienceThe aim of the current study is to evaluate the anti-inflammatory effect of Thymus fontanesii with chemotype carvacrol and its gastroprotective effect against ethanol-induced gastric ulcer model by using the image analysis method by means of the ImageJ® software. The chemical composition of the essential oil was analyzed by gas chromatography/mass spectrometry and the acute toxicity was evaluated. The anti-inflammatory activity was assessed by two methods such the Carrageenan-induced paw edema in mouse at dose of 500 mg/kg and topical inflammation induced by 12-O-tetradecanoylphorbol-13-acetate at dose of 03 and 10 mg/ear. The antiulcer activity of the essential oil of the studied plant was assayed at dose of 250 and 500 mg/kg, by ethanol-induced gastric ulcer model in rats, showed a significant decrease of gastric lesion areas. The obtained results confirm the anti-inflammatory and the gastroprotective activity probably attributed to its main compound, carvacrol which support the traditionally uses of the studied plant. Practical applications: The Thymus fontanesii, which is an endemic plant to Algeria and Tunisia, is traditionally used in the treatment of inflammation and fever. This study revealed that the T. fontanesii essential oil with chemotype carvacrol possesses significant anti-inflammatory activity, side by side with the antiulcer activity as the Ethanol-induced gastric ulcer model showed a significant decrease of gastric lesion areas. Thus, it stands as a promising candidate for further investigations in this area. © 2017 Wiley Periodicals, Inc

Moisture sorption isotherms and heat of sorption of algerian bay leaves (Laurus nobilis)

The moisture sorption isotherms of Algerian bay leaves (Laurus nobilis) were determined experimentally in this work. The equilibrium moisture contents of the leaves were measured at 40, 50, and 60 °C using static gravimetric method. Six mathematical models were tested to fit the experimental data of sorption isotherms and predict the hygroscopic behavior during storage or drying. Peleg model was found to be the best fitting model for describing the sorption curves. The net isosteric heat of sorption was computed fromthe equilibrium data at different temperatures by applying the integrated form of the Clausius-Clapeyron equation. The net isosteric heat of sorption is inversely proportional to the equilibrium moisture content and isfound to be an exponential function of moisture content

Reuse of glass bottles for structural columns

Container glass is omnipresent and reuse can be observed all around the world. It can even be reused for the construction of structural components for buildings of which several examples exist around the world. However, research on the reuse of glass for structural components seems lacking. Therefore, this paper investigates the potential of reusing glass bottles for the construction of structural columns. Firstly, the compression strength of artificially abraded glass bottles was investigated in compression tests, revealing a compression strength between 10 and 20 kN. Secondly, alternative assemblies of multiple glass bottles were tested in compression, to determine their suitability for constructing a column. Finally, an exemplary column prototype constructed of glass bottles is presented. From the findings it is concluded that it is feasible to reuse glass bottles for the construction of structural columns that could carry small scale structures.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Applied Mechanic

Inter-Diffusion of cobalt and silicon through an ultrathin aluminum oxide layer

International audienceOptical emission spectroscopy of sputtered species during ion bombardment, Auger electron spectroscopy and high-resolution transmission electron microscopy were used to study the cobalt and silicon diffusion through the interfaces of Co/AlO/Si(0 0 1) hetero-structure. The results are discussed as a function of the annealing temperature of sample and show that the diffusion process at the interfaces starts for annealing temperatures above 200 °C without detectable modification of the oxide layer