Before Carmen left, she invited them all to breakfast and orientation before the first ride in the morning.
When they were all seated and attentive, she began with the orientation she had been memorizing for the last two weeks.
The purins themselves may be considered as a combination of the pyrimidine and glyoxaline ring systems. For formulae see below; the numbers about the first ring explain the orientation of pyrimidine derivatives.
Swan's measurements, which had misled Bent into accepting a chronology based on a supposed orientation of the "temple," had been shown to be inexact.
Thus the structure of an old thickened root approximates to that of an old thickened stem, and so far as the vascular tissue is concerned can often only be distinguished from the latter by the position and orientation of the primary xylems. The cambium of the primary root, together with the tissues which it forms, is always directly continuous with that of the primary stem, just in the same way as the tissues of the primary stele.