Waste oil is an inexpensive source for biodiesel production, but the high amount of impurities present (free fatty acids, oxidation products) impedes its practical application. The aim of this work is to assess the purification efficiency of the adsorption process with eggshell and its active carbon. Carbonization of eggshell was done at 200 ºC for 4 hours. For activation of the resultant carbo...

Traditional curriculum in electrical engineering separates semiconductor processing courses from courses in circuit design. As a result, manufacturing topics involving yield management, and the study of random process variations impacting circuit behavior are usually vaguely treated. The subject matter of this paper is to report a course developed at Texas A&M University to compensate for the a...

Cold roll forming (CRF) is a bending process where the bending occurs gradually in severalforming steps from an undeformed strip to a finished profile. The process is very interesting for thesheet metal industry due to the high speed in which the profile can be produced. High strength steelhas, in recent years, become more common in CRF. These materials have advantages but also<...

Correspondence analyses were used to explore the relationships between yield and populations of Pratylenchus zeae in an upland rice field and in a greenhouse experiment. Initial soil (Pi) and final root (Pf) population densities of P. zeae, and yield (Y) of rice cv. UPL Ri5 were determined at 490 spots in the field. Very low Y was linked to very high Pf. Low Y was linked to medium or high Pi an...

H2S and CO2 are two well-known emissions with cumbersome management not yet established bulk utilization plans. The invention converts in syngas and, as the only by-products, elemental sulphur water by means of a dedicated (i) Regenerative Thermal Reactor (RTR) (ii) Acid Gas to (AG2S) process layout thanks overall reaction: 2 + = H2 CO S2 H2O. reaction is globally endothermic, but it can energe...