The performance of membrane elements operating in a reverse osmosis system is affected by the feed water composition, feed temperature, feed pressure, and permeate recovery ratio. Membrane compaction and fouling also affect membrane performance. Performance at a given set of system operating parameters can be calculated from nominal membrane performance at reference test conditions. I. FEED WAT...

Selecting suitable cleaning agents and determining justifiable cleaning process parameters are critical prerequisites for cleaning validation. Proper selection of these cleaning agents and parameters could simplify cleaning validation efforts immensely. Process cleaners may range from a single component, such as an organic solvent, to multicomponent formulations that use multiple cleaning mecha...

PURPOSE To investigate the effect of feed preparation characteristics and operational parameters on mixing homogeneity in a convective batch ribbon mixer. METHODS Lactose 100M, lactose 200M, ascorbic acid, and zinc oxide powders were used for the mixing study. Operational parameters studied were rotational speed and mixing time. The feed preparations studied were the use of preblending and th...

Steady advances in VLSI technology and, in particular, Merged Logic and DRAM (MLD) technology are helping Processor-In-Memory (PIM) chips become more feasible and attractive. FlexRAM is an ongoing PIM project at the University of Illinois. In this report, we summarize some architectural aspects of the system and provide a detailed study of the energy consumption of the chip. In our analysis, we...

a viscosity model, based on eyring’s absolute rate theory combined with a cubic pr equation of state and wong-sandler mixing rule, has been proposed in order to correlate viscosities of aqueous solutions of alkanolamine mixtures at atmospheric pressure and different temperatures. in the proposed method, the energy and size parameters in studied equation of state (eos) have been obtained using t...

Effect of scale on the hydrodynamics of gas-solid fluidized beds was investigated in two fluidized beds of 152 mm and 78 mm in diameter.  Air at room temperature was used as the fluidizing gas in the bed of sand particles. The Radioactive Particle Tracking (RPT) technique was employed to obtain the instantaneous positions of the particles at every 20 ms of the experiments. These data were u...

OBJECTIVE To analyze the effectiveness of the Marshall scoring system to evaluate the severity of acute pancreatitis (AP). METHODS We performed a prospective, observational study in 39 patients with AP evaluated by the Marshall scoring system and the Ranson criteria (admission and 48 hours). We assessed the progression of the disease for seven days and compared the data of the two criteria. ...

There are a large number of binary liquid alloys the thermodynamic properties of mixing of which are not symmetrical about the equi-atomic composition—deviating maximally from those of the ideal alloys. Here we have considered three such alloys—indium-sodium, cadmium-sodium and copper-tin—and tried to calculate their heat of mixing at different concentrations of the ingredients. The liquidus li...