Attribute type limitations

In seeking to re-establish faith in Debye s intuitive concept, we tend to view that these difficulties derive from the present limitations of statistical mechanics in dealing with what is essentially an electrostatic problem. Because of the failure to recognize the differences in the two types of averaging process, Debye s critics have illogically attributed the limitations of DH theory to an inadequacy of the LPBE, whereas all the evidence suggests that it is the unlinearized equation which is suspect (19). 

There are numerous types of paint employed in the protection of steel and they are designed to meet the conditions imposed by the environment in which they are expected to function. For steel exposed to the atmosphere, the most common type of paint system is based on alkyl resin and this may be mixed with other types or may itself be chemically modified for a specific purpose, e.g. vinyl toluenated or styrenated to give rapid drying. Other generic types are chlorinated rubber, vinyl, acrylic, epoxy, and polyurethane. All have particular attributes and limitations and selection is usually a matter of discussion between user and supplier. 

Ceramic types belonging to the Early Late Prehistoric Clemson Island and Owasco types are often used to document and reconstmct interaction patterns in north-central Pennsylvania. Despite efforts to do so, the high degree of stylistic similarity between these ceramics often makes it difficult to distinguish between types limiting their use in interaction studies. In this study, trace element analysis was employed to determine if compositional profiles correspond with identified ceramic types. The study suggests that there is no clear distinction between ceramic types and exploited clay deposits. Instead, differences in the technological attributes of thes pots may reflect the location of sites to material resource zones. 

Each class of sealants has certain attributes inherent to the polymer on which it is based. These attributes often define the sealant s appHcations and limitations. Table 12 summarizes each type of sealant s key attributes, principal markets, and limitations. 

Many of the technical problems of fabrication that formerly inhibited the use of titanium alloys in dental castings (164—166) have been effectively solved, and titanium castings may now be obtained for virtually any type of dental appHance at prices that are increasingly competitive. Special induction or electric-arc furnaces are necessary for casting titanium alloys, and this specialized equipment has, until now, been available in only a limited number of commercial dental laboratories. However, the relatively high price of this equipment, attributed to development costs, is expected to decline significantly this should help to improve the general availabihty of cast titanium appHances. 

Since PAN-based carbon fibers tend to be fibrillar in texture, they are unable to develop any extended graphitic structure. Hence, the modulus of a PAN-based fiber is considerably less than the theoretical value (a limit which is nearly achieved by mesophase fibers), as shown in Fig. 9. On the other hand, most commercial PAN-based fibers exhibit higher tensile strengths than mesophase-based fibers. This can be attributed to the fact that the tensile strength of a brittle material is eontrolled by struetural flaws [58]. Their extended graphitic structure makes mesophase fibers more prone to this type of flaw. The impure nature of the pitch preciusor also contributes to their lower strengths. 

Like enzymes, whole cells are sometime immobilized by attachment to a surface or by entrapment within a carrier material. One motivation for this is similar to the motivation for using biomass recycle in a continuous process. The cells are grown under optimal conditions for cell growth but are used at conditions optimized for transformation of substrate. A great variety of reactor types have been proposed including packed beds, fluidized and spouted beds, and air-lift reactors. A semicommercial process for beer used an air-lift reactor to achieve reaction times of 1 day compared with 5-7 days for the normal batch process. Unfortunately, the beer suffered from a mismatched flavour profile that was attributed to mass transfer limitations. 

The difference, e.g., 5.0 - 1.4 in the eolumn marked 20 ng/ml, must be attributed to the interpolation error, which in this case is due to the uneer-tainties associated with the four Rodbard parameters. For this type of analysis, the FDA-accepted quantitation limit is given by the lowest ealibration concentration for which CV < 15%, in this case 5 ng/ml the eross indicates... 

Numerous experimental therapeutics have shown potency in vitro however, when they are tested in vivo, they often lack significant efficacy. This is often attributed to unfavorable pharmacokinetic properties and systemic toxicity, which limit the maximum tolerated dose. These limitations can be overcome by use of drug carriers. Two general types of carrier systems have been designed drug conjugation to macromolecular carriers, such as polymers and proteins and drug encapsulation in nanocarriers, such as liposomes, polymersomes and micelles. 

Microbiological aspects will need to be discussed, but the amount of information will depend on the type of product. For nonsterile products there will need to be a description of the microbiological attributes of the product and, if appropriate, a rationale for not performing microbial limit tests. For preserved products the selection of the antimicrobial preservatives will need to be discussed and the effectiveness of the selected system demonstrated. For sterile products there will need to be appropriate process validation data and information on the integrity of the container-closure system. 

This activity dependence on CO pressure could be attributed to a dissociative-type mechanism, i.e., one that necessitates loss of a carbonyl ligand as a kinetically limiting step ... 

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