April 2013

Kinetics of demineralization of shrimp exoskeleton in chitin and chitosan synthesis

  Kinetic data obtained from acid demineralization (using 1.25 N hydrochloric acid solution) of deproteinized exoskeleton of shrimp was fitted to the shrinking core models for heterogeneous reactions. The element of interest was calcium which was the most abundant element in the deproteinized shrimp (66.27%) and the mostly affected by the demineralization. Experimental kinetic data was fitted to the shrinking...

Author(s):   Ameh A. O., Isa M. T., Adeleye T. J. and Adama K. K.      

April 2013

Failure analysis of bridle chain used for hoisting in mines

  Failure of engineering components due to presence of defects in the material is common. These defects are either present in the material from the casting stage or get developed during subsequent hot working and thermal treatment operations. Identification of the origins of defects is an important task while analyzing failures where pre-existing defects in the material are the causative factors. A case study...

Author(s): Umesh Singh, M. K. Singh and Mohan Singh