!±8± Western Digital 160 GB Scorpio Blue 100 Mb/s 5400 RPM 8 MB Cache Bulk/OEM Notebook Hard Drive - WD1600BEVE

Brand : Western Digital | Rate :

| Price : $98.93
Post Date : Mar 03, 2012 14:47:08 | Usually ships in 1-2 business days

With capacities up to 320 GB, WD Scorpio Blue 2.5-inch PATA hard drives from Western Digital deliver lightning-fast and ultra-quiet performance hand-in-hand with low power consumption. In addition, they are designed with ruggedness, reliability, and data-protection features that actively watch over valuable data. These drives feature up to a 100 Mb/s PATA interface and 8 MB cache. WD Scorpio Blue hard drives are designed for portable digital devices of all kinds, including notebook computers, external storage, and digital media players.

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Saturday, January 21, 2012

A mechanistic study on the coupled organic and colloidal fouling of nanofiltration membranes.

!±8± A mechanistic study on the coupled organic and colloidal fouling of nanofiltration membranes.

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| Price : $69.00
Post Date : Jan 21, 2012 04:17:31 | Usually ships in 24 hours

A mechanistic study on the coupled organic and colloidal fouling of nanofiltration membranes.

The more wide-spread use of nanofiltration membranes in industrial applications is dependent upon understanding the fouling behavior of representative feed solutions, such as complex suspensions with both organic and colloidal inorganic foulants. In this thesis, three hypothesized mechanisms responsible for enhanced membrane flux decline in the presence of multiple foulant types are examined experimentally: increased hydraulic resistance of the mixed cake layer structure, hindered foulant diffusion due to interactions between solute concentration polarization (CP) layers, and changes in colloid surface properties due to organic adsorption. Additionally, a modified composite cell-model is developed to incorporate the structural differences of a merged, combined fouling layer. Results, including a synergistic effect caused by increased resistance of a heterogeneous fouling layer as well as the adsorption effects of interacting foulants, indicate that current fouling layer models need to be reexamined to include the mechanisms suggested in this study.