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Poor, identifying

In general, the polymers with polyconjugated systems of double and triple bonds are photoeonductive in the UV and at least part of the visible range. In some cases the photoresponse extends to the near infrared range. Although their usefulness in practical applications has been many times suggested, the results have been more or less disappointing. The main problems still remain difficult synthesis, in most cases poorly identified structure, and with few exceptions insolubility and intractability of the polymers. The direct comparison with poly(N-vinyl carbazole) and other photoeonductive polymers is not possible for lack of comparative data. [Pg.21]

The interpretation of ion-exchange kinetics in terms of homogeneous 1 heory is mathematically exact in most cases, but shortcomings are present and can be attributed to the effect of poorly identified solid-phase structural and morphological parameters on ionic migration (Sparks et al., 1980 Nkedi-... [Pg.103]

The TPD of both Cat 1 and Cat 2 could be described by the quasiequilibrium model with two adsorption states. The TPD curves of Cat 2 were best described by two significant adsorption states whereas those of Cat 1 were best described by one major and one minor adsorption state. The parameters of the minor adsorption state were poorly identified and the pre-exponential factor was therefore fixed to match the maximum AS. The estimated parameters with their 95 % confidence intervals are reported in Tables 2 and 3. The enthalpy estimates for state 1 were nearly the same for Cat 1 and Cat 2, whereas those for state 2 differed. Figure 2 presents the model solution and the TPD data of Cat 2. Compared to the previous results obtained by applying the differential reactor model the fit and the number of required states remained the same despite the reactor model. [Pg.97]

Pump code. These are usually self-explanatory. Only the regular CO2 laser transitions are given explicidy (e.g. 9P34, 10P08). Occasionally the pump transition is poorly identified — this is signified by for example 9P . Other codes are ... [Pg.51]

Chemists usually learn about reactions according to fiinctional groups for example, How can I make an aldehyde and what reactions are known for aldehydes " This is clearly not a very good starting point for classifying reactions. The poor state of affairs in the definition of reaction types is further quite vividly illustrated by the fact that many chemical reactions are identified by being named after their inventor Diels-Alder reaction, Michael addition, Lobry-de Bruyn-van Ekenstein rear-... [Pg.172]

Basil (Sweet Basil). Basil consists of the brown, dried leaves and tender stems of Ocimum basilicum L. (Labiatae), an aimual native to India, Africa, and Asia, and cultivated in Egypt, southern Erance, Morocco, the Mediteranean countries, and the United States. Basil is one of the oldest known herbs, and it is reported that there are perhaps 50—60 poorly defined Ocimum species which can only be identified according to their chemical components. The flavor of the basihcum type is warm, sweet, somewhat pungent, and pecuhar, ie, methyl chavicol and linalool. It is used with meats, fish, certain cheeses, and tomato-based salads. The fresh leaves are ground and known as pesto with pastas. It is the main component of the Hqueur Chartreuse. [Pg.27]

Chemical and physical solvent losses can render a process uneconomical. Desirable solvents are good solvents for urea, poor solvents for CA, high boiling, and stable to pyrolysis intermediates, ammonia, oxygen, and heat. Although no perfect solvent has been identified, some solvents, eg, dinitriles (94), pyrrohdinones (95,96), and sulfones (97) largely meet these requirements. [Pg.420]

Manways left off trays. Poor separation. Everything looked good. Scan interpretation did not identify problem until after the tower was opened. In fact, the trays with properly installed manways were thought to be entraining. Installation error. [Pg.300]

Because the hazard is still present, there is always a danger that its potential impacts could be realized by some unanticipated route or mechanism. Nature may be more creative in inventing ways by which a hazardous event can occur than experts are in identifying them. Accidents can occur by mechanisms that were unanticipated or poorly understood. [Pg.10]

Baird is the 20-acre site of a former chemical mixing and batching company. Poor waste disposal practices resulted in the contamination of groundwater, soil, the municipal water supply, and a brook adjacent to the site. Over one hundred contaminants, including chlorinated and nonchlorinated volatile organics, heavy metals, pesticides, herbicides, and dioxins, had been identified in site soil and groundwater. Remediation activities included soil excavation and incineration, and groundwater treatment (the audit focused on the soil excavation and incineration... [Pg.179]

In this book those ferroelectric solids that respond to shock compression in a purely piezoelectric mode such as lithium niobate and PVDF are considered piezoelectrics. As was the case for piezoelectrics, the pioneering work in this area was carried out by Neilson [57A01]. Unlike piezoelectrics, our knowledge of the response of ferroelectric solids to shock compression is in sharp contrast to that of piezoelectric solids. The electrical properties of several piezoelectric crystals are known in quantitative detail within the elastic range and semiquantitatively in the high stress range. The electrical responses of ferroelectrics are poorly characterized under shock compression and it is difficult to determine properties as such. It is not certain that the relative contributions of dominant physical phenomena have been correctly identified, and detailed, quantitative materials descriptions are not available. [Pg.113]

At the same time, companies whose PSM requirements vary widely among locations may not find a centralized, compan3wide approach practical, unless PSM status is uniformly poor. In any case, some central coordination will help identify common issues and facilitate the sharing of knowledge and experience among locations. [Pg.96]

As previously noted, cility-specific approaches tend not to succeed where the overall current status of PSM is poor. Local staff will not have the necessary knowledge or experience of safety management to develop and implement a program without considerable outside assistance. Even if you have identified significant variations, if your team decides that overail PSM performance is low you should consider a companywide strategy rather than a facility-specific approach. [Pg.98]


See other pages where Poor, identifying is mentioned: [Pg.256]    [Pg.198]    [Pg.283]    [Pg.284]    [Pg.44]    [Pg.300]    [Pg.271]    [Pg.806]    [Pg.601]    [Pg.256]    [Pg.198]    [Pg.283]    [Pg.284]    [Pg.44]    [Pg.300]    [Pg.271]    [Pg.806]    [Pg.601]    [Pg.449]    [Pg.705]    [Pg.28]    [Pg.126]    [Pg.131]    [Pg.161]    [Pg.269]    [Pg.182]    [Pg.2550]    [Pg.2573]    [Pg.17]    [Pg.90]    [Pg.104]    [Pg.247]    [Pg.37]    [Pg.106]    [Pg.724]    [Pg.196]    [Pg.198]    [Pg.235]    [Pg.248]    [Pg.140]    [Pg.242]    [Pg.25]    [Pg.54]    [Pg.86]    [Pg.88]   
See also in sourсe #XX -- [ Pg.51 ]




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