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Lipase-Mediated Syntheses of Trimethylolpropane-Based Biolubricant and Cyclic Carbonate

Abstract Biocatalysis is considered as benign and efficient alternative to chemical catalysis for organic syntheses. Lipases are the most versatile biological catalysts implemented so far with great potential for production of different chemicals and materials in non-conventional reaction media. This thesis presents investigations on lipase catalyzed esterification and transesterification reaction

Mapping a quartz vein using three electrode arrays at Santo Domingo, Nicaragua

The multi-electrode electrical resistivity method has become one of the most efficient geophysical methods used in a wide range of applications, which is also suitable when disturbances in the ground are to be avoided. The selection of the right electrode configuration can provide better effectiveness, depending on the target being investigated. In this work a case of the use of three electrode ar

Damage Identification in Concrete using Impact Non-linear Reverberation Spectroscopy

Non-linear acoustic methods has shown increasing potential in the identication of damage in brittle materials such as concrete. Commonly, these methods focus on one or several resonance frequencies of the material and on the relative change in resonance frequency and attenuation with strain amplitude which has been shown to allow one to identify the extent of the material damage. However, current