Conservation procedure

In most instances, external-beam radiation therapy used in conjunction with breast-conserving procedures involves 4 to 6 weeks of radiation therapy directed to the breast tissue to eradicate residual disease. Complications associated with radiation therapy to the breast are minor and include reddening and erythema of the breast tissue and subsequent shrinkage of total breast mass beyond that predicted on the basis of breast tissue removal. Some clinical situations also require postmastectomy radiation therapy as well (see section on locally advanced breast cancer). 

FIGURE 41 Bronze disease. Bronze disease, one of the most serious corrosive processes besetting recovered bronze antiquities, results from the interaction of one component of the patina on ancient bronze, namely, cuprous chloride with atmospheric oxygen, in a damp environment. Small spots of a light green powder (composed mainly of cuprous chloride) that grow rapidly on the surface of the patina are indicative that the bronze disease process is active. Unless the chemical activity of cuprous chloride is inhibited by some conservation procedure, bronze disease generally results in the eventual total destruction of bronze objects. 

C] is a nonscientific, judgmental safety factor, i.e., a social or political value judgment. The default value is 1, indicating that no additional MOS is needed over that provided by the inherently conservative procedure above. 

In cases where confidence limits can be calculated for the bias, the critical CV-p should be read from the dotted curve at a position corresponding to the 95% upper confidence limit for the bias. This is a conservative procedure. 

Since Vaughn s work has indicated a stronger dependency of pressure drop upon wall temperature than is given by Eq. (33), it seems probable that use of this procedure would also be in error if applied to the cooling of non-Newtonian fluids, but in the direction of predicting pressure drops lower than those actually encountered. Until adequate design methods are developed, the following conservative procedure is recommended. 

The one-hit or linear multistage models should always be among the models employed because they are usually among the more conservative procedures. Reasonable worst-case assumptions must often be made to err on the side of safety. 

Testing treated books with other conservation procedures. 

TAye analysis, especially in conjunction with other research, can provide much information for those entrusted with historic textiles. Information regarding the effects of pesticides, conservation procedures, storage environments, and exhibition conditions on fibers and dyes will allow curators and conservators to make decisions in the best interest of the preservation of the textiles. In the past, dye analysis of historic textiles has not always been successful, attributable to a great extent to the small sample sizes afforded. Refinements in the field of thin layer chromatography, especially in adsorbants, has made dye analysis much more... 

Once the artifact has been brought to the museum laboratory, a wide range of conservation procedures are undertaken not only to assure the long term survival of the artifact but also to return it to an approximation of its original state. 

That none of the above methods is completely satisfactory as a conservation procedure is generally agreed. One interesting recent development involves the application of freeze-drying technology (24,25) combined with polyethylene glycol impregnation. 

It will be seen that the successful treatment of any object requires the conservator to have a wide range of skills. These include an understanding of the scientific principles behind any treatment process, a knowledge of the technology of the material from which the object was made, an appreciation of the techniques employed in its manufacture and the craft skills to undertake the conservation procedure. This applies just as much to the treatment of leather artefacts as to those which are sometimes more conventionally valued. 

Freeboard Design Refrigerated Freeboard Devices Carbon Adsorber Conservation Procedures... 

In the recipe adopted for treatment of the fast-neutron attenuation, it is assumed that all fast neutrons entering the concrete are captured after penetrating the concrete by a distance equal to the "age displacement." IHie secondary y rays so formed are then postulated to all flow outward with the estimated 10 cm relaxation length. The required shielding is calculated on the basis that these y rays and the neutrons are to be attenuated to tolerance. It can be shown that this- is a more conservative- procedure than that of considering an exponentially distributed source of capture y rays from the absorption - of the neutrons in the- shield. ... 

In the response spectrum method, the maximum response of each mode should be calculated by direct use of the design response spectrum. The maximum response in each principal direction should be determined by an appropriate combination of the modal maxima, such as the square root of the sum of the squares of each modal response, or by the complete quadratic combination procedure. For closely spaced modal frequencies, a conservative procedure should be applied by taking the sum of the absolute values of each closely spaced modal and rigid response. The missing mass as a function of the modelling detail, cut-off frequencies and modal participation factors used in the analysis should also be carefully assessed and documented. 

A variety of surgical of conservative procedures can be used for treatment of the different penile traumas depending of the type and severity of injuries. 

A class of improved population analysis schemes has been designed to reproduce the total dipole moment of the molecule when calculated by point charges. Such a dipole moment conserving procedure was proposed e.g. by Jug [99] and by Thole and van Duijnen [100]. A more general multipole fitted scheme has also been derived [101]. A slightly different approach is to determine potential derived atomic charges which are fitted to reproduce the values of the electrostatic potential outside the van der Waals envelope of the molecule [102, 103]. 

The techniques for reversal should be made explicit during the initial conservation procedures. 

Palmer, M. H., Lloyd, M. E., and Lloyd, K. E., An experimental analysis of electricity conservation procedures, /. Appl. Behav. Anal, 10,665,1978. 

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