Methods of placing

Procedure VIII-2 requires the presence of a nitrile group (-ON). Since we have not covered the methods of placing a -ON on an aromatic ring, We will bypass this procedure. 

The Friedel-Crafts alkylation of naphthalene often yields a variety of products. For this reason it is not frequently used. A better method of placing an alkyl group involves reduction of the ketone formed from procedure XVI-4 using either the Wolff-Kiscliner or Clcmmcnscn reductions. 

Answer The Friedcl-Crafts alkylation reaction is useless in the naphthalene scries because of the polyalkylation that frequently occurs. The best method.of placing an alkyl group on a naphthalene nucleus involves the reduction of a ketone using the Wolff-Kischner or Clemmensen reductions as shown in procedure XVI-7. Thus wc need A. 

Method of placing the feed on the strand. Roll-type and vibrating feeders are preferred over the older swinging-spout feeders since they do not destroy bed permeability. 

A relatively easy method of placing an active phase homogeneously on a monolithic support is by deposition precipitation (76). The advantage of this method is that an insoluble metal salt is deposited on the support, which usually cannot spread readily during the drying step. Satisfactory results are obtained when supersaturation of the liquid occurs everywhere in the monolith at the same rate. This goal can be achieved by a homogeneous deposition precipitation procedure in which both the... 

Holes might be placed by drilling or driving. Jetting might also be used, but would probably disturb the formation too much. Only a field test or previous experience can decide the most economical method of placing grout pipes. 

Is the method of placing holes consistent with the formation and the depth and accuracy of placement required ... 

Special attention must be given to the method of placing the carbon into the liquid to be treated so as to avoid carbon dust from being blown or otherwise scattered throughout the premises, because dirt and black dust can be a significant deterrent to the use of powdered carbon. That the dust nuisance is avoidable is demonstrated by the successful use of powdered carbon in dry-cleaning establishments and water plants.3,10,11 12... 

The purpose of foundations is to distribute the loading from structures and equipment so that perpetual settlement of the load-bearing soil will not cause excessive maintenance or impair the usefulness of the plant. The selection of a suitable type of foundation or soil loading support structure depends on the loads to be transferred to the foundation, on the material on which the foundation rests, and on the method of placing the foundation as dictated by the subsoil conditions. 

A large number of techniques are available, depending on the specific need to analyze major chemical components, minor components, nonmetallic impurities, and metallic impurities (see Table 3). Further, the applicability of a technique depends on the concentration of impurities in the powder, a problem of considerable magnitude for ultrapure powders. A general problem with the techniques that require dissolution of the powders is their resistance to chemical attack and lack of complete dissolution. The two major methods of placing the powders in solution are acid dissolution and flux decomposition followed by dissolution [2,3]. The nonavailability of standard reference powders and procedures is a serious drawback to all the analysis methods. It is not possible to cover all the available techniques therefore, only selected techniques with applicability to bulk and minor impurities are described here. 

It has been observed that with high fibre content both and p are increased, while the length of the fibres influences only the plastic viscosity p. However, the main factor is the amount of dispersed fibres (cf. Chapter 5) when ordinary technology is applied. For higher fibre content non-conventional methods of placing the fresh mix in the forms like SIFCON are necessary (cf. Section 13.5). 

The preferred method of placing a sample on a preparative layer is to apply it as a narrow streak across the plate. It is highly desirable to have the streak as straight and as narrow as possible. With practice, skill, and care it is possible to streak a plate correctly by hand, using a syringe. The use of a Teflon tip on the end of the syringe has the advantage that the layer is not mechanically disturbed. 

The actual method of placing the dilute solution of protein on the surface appears to be relatively unimportant provided the conditions are favorable for spreading. Common sense dictates that the drop size be small and that the drops be distributed over the avfulable surface and not confined to a small area. The drops of protein solution are touched to the surface rather than allowed to fall on the surface. 

Irrespective of the method of placing the catheter into the peritoneal cavity, a decision about what to do with the external end must be made prior to the beginning the procedure. If the catheter is to be used within a short time, the exte-... 

Figure 7-10 Methods of placing the green sheets (a) placed rotated at 90° and, (b) z axis alignment checL...

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