Normal segregation

Inherently incompatible blocks in block copolymers normally segregate into separate phases in the bulk. However, if block copolymers are included in and then subsequently coalesced from their CD-ICs, the phase segregation of their incompatible blocks may be controlled. For example, if all blocks of a block copolymer are included in its CD-IC, then, similar to the case for common CD-ICs containing two or more homopolymers, upon coalescence we would expect a reduction in the phase segregation of their blocks. On the other hand, if some blocks are included... 

Waste paper stock destined for recycling is normally segregated into grades according to whether the original pulp was produced by chemical or mechanical methods. The separate stocks are then repulped (dispersed) in a hot dilute solution of sodium hydroxide, sodium phosphate, or sodium silicate in water, and cleaned via a series of raggers, cyclones, and screens. Self adhesive labels and tapes pose a perennial problem in recycle pulps that a recently developed test method may help to solve [70]. Standard printer s inks... 

Type of flow Segregation Normal Normal Segregation Segregation... 

Normal segregation in a columnar ingot. soiiJified with an almost planar interface schematic). 

A i high solute concentrations a well-developed dendrite structure occurs (.vee Section 4.5) and under these conditions fluid flow between the dendrites becomes dominant. Normal segregation is no longer expected. 

Fig. 2c and d show the chlorophyll-protein complexes from mutant and normal segregants of hcf -3. The normal membranes (d) contain the full complement of complexes CP I, the reaction centre complex of PS 1 CP II and CP II, the oligomer and monomer forms of the LHCP CPa-1 CPa-2 and CP 29, the minor Chi arfb complex associated with PS II. Membranes from plants with the mutant phenotype contain all the other complexes but contain little or no CPa-1. It Is particularly Interesting that they do contain CPa-2, since this complex has also been proposed as part of the reaction centre. This evidence also supports our contention that CPa-1 Is the PS II reaction centre complex. 

The ripple experiment works as follows In Fig. 6, HDH and DHD are depicted by open and filled circles where the filled circles represent the deuterium labeled portions of the molecule and the open circles are the normal (protonated) portions of the chains. Initially, the average concentration vs. depth of the labeled portions of the molecules is 0.5, as seen along the normal to the interface, unless chain-end segregation exists at / = 0. If the chains reptate, the chain ends diffuse across the interface before the chain centers. This will lead to a ripple or an excess of deuterium on the HDH side and a depletion on the DHD side of the interface as indicated in the concentration profile shown at the right in Fig. 6. However, when the molecules have diffused distances comparable to Rg, the ripple will vanish and a constant concentration profile at 0.5 will again be found. 

Suitable sites are normally limited to those areas designed in development plans as being for industrial or commercial uses. Such land should be capable of being accessed directly from the primary or secondary distributor roads in the area. Segregation of tmcks and tmck access from residential areas should be achieved where possible. 

Alternatively, the contaminated surface drainage must be segregated from the normal storm water drains and may, for example, be led into a balancing tank. This tank must be large enough to even out the variations and to allow the contents to be added to the works effluent (treated or untreated) over a period of time. Provision must be made for periodically removing the inevitable accumulation of silt in the bottom of the tank. 

Ide and White W studied the viscoelastic effects in agitating polystyrene solutions with a turbine. At concentrations below 50% PS, flow was normal. Abovfe 35%, the viscoelastic forces caused the flow to reverse, moving away from the impeller along the axis. At 30 to 35% PS, both occurred, causing a segregated secondary flow around the turbine. 

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