Poly limiting factors

When phosphate is the limiting factor, the induction mechanism is more difficult to deduce. However, bacteria, like all other living systems, are not able to generate ATP by phosphorylating ADP in the absence of phosphate. It seems quite plausible that, under these conditions, 2/H/ do not flow away. As in the two previously mentioned limitations, 2/H/ remain and acetyl-CoA becomes available, thus both substrates could be assimilated and deposited intracellularly as poly(3HB). 

The physicochemical incompatibility of the polystyrene supports with the peptides has been observed to be one of the problems associated with the original Merrifield method. This has been approached successfully by Sheppard and coworkers by the introduction of the polar polyacrylamide supports. Poly(JV-acrylylpyrrolidine) resin is another polar polymeric support developed on similar grounds. The use of these polar resin supports facilitated the solid phase synthesis of a number of peptides and protein sequences in higher yield and purity than with the polystyrene resins. However, the inadequate availability of these polar supports appears to be a limiting factor for a wider utilization at present. 

Thus, the concept of universal calibration provides an appropriate calibration also for polymers for which no calibration standards exist. The limiting factor of this approach is the accuracy of determining K and a. There are very high variations in the values reported in the literature [63,64]. Even for such common polymers as polystyrene and poly(methyl methacrylate), the values may differ considerably. 

Bear MM, LeboucherDurand MA, Langlois V, Lenz RW, Goodwin S, Guerin P (1997) Bacterial poly-3-hydroxyalkenoates with epoxy groups in the side chains. React Funct Polym 34 65-77 Blackman FF (1905) Optima and limiting factors. Ann Bot 19 281-295... 

Charge trapping and untrapping of a bilayer system Pt/poly[Ru(Vbpy)3] / poly[Fe(Vbpy)j] was studied. It was shown that electron diffusion in the iimer bilayer film is an important rate-limiting factor. 

In the early sixties it was reported [19] that quite a few Diels/Alder reactions had been successfully accelerated by Lewis acids. The limiting factor usually is poly-... 

Fig. 7a, b. PMIM-image of (a) a poly-p-bromostyrene surface [118], (b) a PS/polybutadiene diblock copolymer, PS-b-PB, at approximately 100 fold magnification. The lateral resolution is of the order of 1 pm while the height resolution is of the order of 0.6 nm. The root-mean-square roughness averaged over the area shown is 0.8 nm in (a) close to the resolution limit of the technique. It is much larger (10 nm) in (b) due to the formation of steps after annealing. The scale in z-direction in (a) and (b) is different by a factor of 7... 

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