The generation of urban waste represents a problem for cities, so quantifying and analyzing its is fundamental municipal planning. To obtain these data, study was conducted in Riobamba, forty households were selected, data collected, phase I determined the composition based on quartering methodology, II pilot source sepa-ration program implemented quantified, with obtained estimates made accord...

the gas separation performance of commercial ceramic titania and hybrid silica (hybsi®) membranes was assessed using the gas permeation and permporometry methods. results indicated that the hybsi® membranes have a hybrid surface containing regions covered by a polymeric matrix and others with inorganic pores. these membranes have high h2 selectivity, which increases significantly with temperatu...

In this paper we explore tramp ship routing and scheduling. Tramp ships operate much like taxies following the available demand as opposed to liner ships that operate more like busses on a fixed route network according to a published timetable. Tramp operators can determine some of their demand in advance by entering into long term contracts and then try to maximise profits from optional voyage...

HPLC stationary phases of monolithic and fused core type can be used to achieve fast chromatographic separation as an alternative to UPLC. In this study, monolithic and fused core stationary phases are compared for fast separation of four fat-soluble vitamins. Three new methods on the first and second generation monolithic silica RP-18e columns and a fused core pentafluoro-phenyl propyl column ...

A recent model of the hippocampus predicts that the unique properties of the dentate gyrus allow for temporal separation of events. This temporal separation is accomplished in part through the continual generation of new neurons, which, due to a transient window of hyperexcitability, could allow for preferential encoding of information present during their development. Here we obtain in vivo el...