Single center

Compressors up to around 75 kW (100 hp) usually have a single center-throw crank, as illustrated in Fig. 10-83. In larger sizes compressors are commonly of duplex construction with cranks on each end of the shaft (see Fig. 10-87). Some large synchronous motor-driven units are of four-corner construction i.e., they are of doubleduplex construction with two connecting rods from each of the two crank throws (see Fig. 10-88). Steam-driven compressors have one or more steam cylinders connected directly by piston rod or tie rods to the gas-cyhnder piston or crosshead. 

The presence of two reactive nucleophilic centers on the terminal units, as opposed to single centers of doubly bound units already in the chain. 

Florvaag E Anaphylaxis during anesthesia in Norway a 6-year single-center follow-up study. Anesthesiology 2005 102 897. iS... 

Stener and co-workers [59] used an alternative B-spline LCAO density functional theory (DFT) method in their PECD investigations [53, 57, 60-63]. In this approach a normal LCAO basis set is adapted for the continuum by the addition of B-spline radial functions. A large single center expansion of such... 

A single-center review of 350 acute stroke patients treated with lAT using urokinase showed recanalization rates greater than 75% when additional endovascular techniques (such as mechanical fragmentation of the thrombus, thromboaspiration,... 

Of course, there is intrinsically no sharp physical distinction between a strongly delocalized lone pair and a highly polarized dative bond. As shown by Eq. (1.31a), a general NBO allows smooth variations of polarization coefficients between the single-center ionic (ca = 0, cb = 1) and two-center covalent (ca = cb) limits. 

One way around the slow convergence of single-center expansions is a multi-center multipole expansion [225-229], Several workers have explored the utility ofDME within the SCRF framework [112, 164, 171], Of course, when the multipoles do not reside at atomic positions, it is clear that calculation of such quantities as analytic energy derivatives will become more difficult. 

Cernea S, Kidron M, Wohlgelernter J, and Raz I (2005) Dose-response relationship of an oral insulin spray in six patients with type 1 diabetes A single-center, randomized, single-blind, 5-way crossover study. Clin. Ther. 27 1562-1570. 

We will follow the derivations presented in the work by Poshusta and Kinghorn [104] for the single-center Gaussians. The present work differs from theirs in that we use multicenter Gaussians to shift density away from the origin of the coordinate system. A definition used in the integral formulas is... 

The reaction of an olefin with hydrogen may be analogous to the related homogeneous reaction (44, 46). The olefin may form a n complex with a single center and combine with hydrogen in the sequence shown in Fig. 22A. Besides the reverse of the preceding sequence, an alternative... 

Schmitt T, Keller E, Dietrich S, Wuchter P, Ho AD, Egerer G (2010) Trabectedin for metastatic soft tissue sarcoma A retrospective single center analysis. Mar Drugs 8 2647-2658. 

Since the hydrogenlike Sturmian basis functions form a complete set, the term %i,o,o(xy-R) can be represented as a single-center expansion in terms of functions localized at the origin ... 

As discussed earlier in this chapter, the spin density of a radical indicates where its unpaired electron resides. This in turn allows qualitative assessment of radical stability. A radical in which the unpaired electron is localized onto a single center is likely to be more labile than a radical in which the unpaired electron is delocalized over several centers. An even more useful indicator of radical stability and radical reactivity is provided by a so-called spin density map. Like the other property maps considered in this chapter, this measures the value of the property (in this case the spin density) on an electron density surface corresponding to overall molecular size. 

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