Apex-to-base

The V-A15 structure was first suggested for BgHg LB to account for the apex-to-base methyl migration of l-CHgBgHg in the presence of a Lewis base (i.e., two sets of borons become equivalent in a V-A15 intermediate), but the Lewis base equivalents of IV-A15 or III-A15... 

Determinate Inflorescences.—Determinate Anthotaxy is one in which the first flower that opens is the terminal one on the axis, the other appearing in succession from apex to base or from center to margin. The principal varieties are ... 

A segment of the left anterior descending coronary artery (LAD), approximately two-thirds the distance from apex to base, is isolated and a silk ligature is placed around the segment. 

Figure 12. Contoured wall thickening map (T/r - Tps) derived from circumferential wall measurement in the images of Figure 13. The difference in wall thickness between end diastole and end systole is related to the contractile state of a region of heart muscle. The horizontal axis is distance along the left ventricular long axis from apex to base. The ordinate is circumferential dimension of the left ventricle. Intensity is the scaled rate of wall thickening (maximum = 40 mm/s minimum = 4 mm/s) (Schwartz et ai, 1983a).

An easy way to quantify the adsorptive and acid/base characteristics of a column is to measure the peak height as a percentage of that expected for complete and undisturbed elution. The two alkanes and three fatty acid methyl esters (non-adsorbing peaks) are connected at their apexes to provide the 100% line as shown in Figure 2.8 [190]. The column activity is then quantified... 

Additionally, the outer ten A1 atoms are bonded to two bromine atoms each and saturated by a donor molecule (THF, THP). The apex and base atoms in the AI12 icosahedron are not naked they are shielded by one donor molecule each. Despite the great sensitivity of these Al22 subhalides 65 and 66, it was possible to obtain solid-state 27A1 NMR spectra and XPS measurements, which showed indeed that three electronically different types of A1 atoms are present [100]. The type of... 

With respect to the naked metal atoms, this is the largest metalloid duster that has ever been structurally determined by diffraction methods. The Ga2 unit in the center of the 64 naked Ga atoms is remarkable and unique in this entire field of chemistry [Figure 2.3-28(c)]. The Ga2 unit, which contains a bond that is almost as short (2.35 A) as the above-mentioned Ga-Ga triple bond (2.32 A) and resembles the Ga2 unit of a-Ga (2.45 A), is surrounded by a Ga32 shell in the form of a football with icosahedral caps [see d-Ga (Figure 2.3-17)]. The apex and base atoms of this Ga32 unit are naked and are oriented towards each other in the crystal in an unusual fashion (see below). The Ga2Ga32 unit is surrounded by a belt of 30 Ga atoms that are also naked . Finally the entire Ga framework is protected by 20 GaR groups. 

Some computer data systems have based their resolution calculations on the peak width at half the distance from the apex to the base of the peak [49]. Peak widths have also been measured at the point of inflection. 

Campylo tropous.—Applied to ovules or seeds that are curved so as to. bring the apex and base near together. 

Trim and slice the excised left ventricle transversely between apex and base into five to six approximately equal thickness slices with a razor blade. 

Turbinatei top-shaped, thick at the apex, tapering to base. 

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