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Growth cycling conditions

Modem process facHities are computer controHed. Temperature and AT are programmed upward during the start of a growth cycle, pressure and temperature are monitored and controHed, and pressure and temperature overshoot alarms and overrides are provided. Such systems also store data from previous mns for correlations with properties or for identical repHcation of past conditions. [Pg.519]

Plant Proteases. These include the well known proteases papain, bromelain and ficin. Most plant enzymes are available as comparatively unpurified powder extracts, although papain is notable for being available in a stabilized and purified liquid form. Prospects for increased supply of plant enzymes, in response to greater use in traditional applications or for new processes, depend on several factors. Tlie influence of cultivation conditions, growth cycle and climate requirements make new supplies long term projects. [Pg.65]

A characteristic feature of allelopathy is that the inhibitory effects of allelopathic compounds are concentration dependent. Dose-response curves with known compounds show an inhibition threshold. Below this level either no measurable effect occurs, or stimulation may result. Although the concentration of a compound required to exceed the inhibition threshold varies extensively according to different sensitivities among species and also among phases of the growth cycle for higher plants, the concept of an inhibition threshold seems consistent. Thus, it is reasonable to evaluate how, and if, a subthreshold concentration of an allelochemical may contribute to allelopathic interference. Also in need of evaluation is how environmental conditions may influence the deleterious action of an allelochemical and the concentration required for an effect. Such interactions are especially pertinent for those environmental situations that place some degree of stress on plant functions. [Pg.344]

Figure 6.6 shows the effect of the processing cycle on the void diameter for pure water and air-water voids of 0.1 cm initial diameter under the specified cycle conditions. It was assumed that the air—water void initially consists of pure air, even though there is likely to be a small but finite water partial pressure. This plot can be divided into the various stages of void growth and dissolution and interpreted as follows. [Pg.196]

In order to study the virus growth curve a one-step growth cycle is performed. A high multiplicity of infection (m.o.i.) is used to ensure every cell is infected — usually 10 plaque forming units (p.f.u.) per cell is adequate. For virus production, however, the infection is prolonged under conditions where secondary infection can occur and a low m.o.i. is recommended especially where there is a tendency for defective virus particles to be produced. [Pg.283]

Phytotoxins are classical secondary metabolites and as such possess all the characteristics one would expect of such compounds. They are a) structurally heterogeneous, b) contain a variety of functional groups, c) produced by a restricted number of microorganisms, d) produced at specific phases in the growth cycle, e) highly dependent on nutritional and environmental conditions for synthesis and f) not readily metabolized. [Pg.65]

The kinetics are dependent on the nature of the metal complex and also on the relative amount of initiator. Usually, the organic hahde used as an initiator and the metal compound are employed in a 1 1 molar raho as control of molecular weight is ophmal under these conditions, but higher ratios can also be used [155]. The metal compound is thus effechve in catalytic amounts . It should be noted that by contrast to, for instance, olefin polymerization the metal complexes involved in ATRP are not directly part of the polymerizahon chain growth cycle. Nonetheless, fhey are usually designated as catalysts in the hterature, and fhis des-ignahon is adopted throughout this sechon. [Pg.260]

Also, during start-up conditions with systems that nucleate heavily or with systems that exhibit cycling behavior with regard to crystal size, it will be found that lower-than-equilibrium values of the finer crystal sizes will be present for a time during the growth cycle. [Pg.119]


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See also in sourсe #XX -- [ Pg.200 ]

See also in sourсe #XX -- [ Pg.200 ]




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Growth conditions

Growth cycle

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