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Masoumeh Zakeri,Mohamed Mahmoud Nasef,Ebrahim Abouzari-Lotf,Arezoo Moharami,MAJID M. HERAVI 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.29 No.-
Green approaches to the synthesis of spiro-4H-pyrans are reported based on the one-pot and three-component condensation via a domino Knoevenagel/Michael/cyclization sequence. These approachesinvolve evaluation of the activity of several organocatalysts in water as a reaction media and also undersolvent-free in both microwave irradiation and ball milling conditions. Extensive experiments werecarried out to optimize the reaction parameters including type and amount of catalyst, reactiontemperature and time. Microwave irradiation in presence of 4-dimethylaminopyridine (DMAP) wasobserved as the best procedure with good yields, short reaction time, environmental friendliness, andconvenient operation.
Enhancement of electronic protection to reduce e-waste
Yadollah Abdollahi,Suhana Binti Mohd Said,Nor Asrina Sairi,Mohd Faizul Bin Mohd Sabri,Azmi Zakaria,Ebrahim Abouzari-lotf,Masoumeh Dorraj,Raba’ah Syahidah Aziz 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.29 No.-
The electronic devices turn to e-waste due to their insufficient electrical protection which is provided bya ceramic core varistor. The ceramic consists of the surrounded ZnO grains of melted an additives layer. The layer is origin of the quality of the protection. To enhance the quality and consequently prevent ewaste,the fabrication of the varistor was modeled by artificial neural network. The model predicted theoptimized condition that was experimentally fabricated and electrically characterized. The resultsconfirmed the model predictability. In conclusion, the optimization which has industrial scales uppotential warranties the electronic protection that controls the global e-waste.