Abbreviations, decoding

In an effort to maximize economy of production and still retain clarity in presentation we have resorted to the extensive use of abbreviations in these tables. For the most part, these abbreviations should be self-explanatory and are decoded at the bottom of each page. Two less obvious abbreviations deserve special note. 

Despite the physical bulk of this volume and the stringency with which we applied the criteria, described in the Preface, for restricting its scope, ruthless abbreviation and condensation have been necessary in compressing the information that is given here into the space available for it. The list of abbreviations and symbols is therefore essential to the correct decoding and interpretation of entries that would be unintelligible without it-One copy of this list appears inside the front cover, there is another inside the back cover, and a third is on an unbound sheet intended to make the list immediately accessible to the user of any page. 

Some salient features of the apparatus are summarized in this column. The basic code is a three-character alphanumeric, of which the first character is a digit that describes the cell, the second is a letter that indicates whether and how dissolved oxygen was removed, and the third is a digit that identifies the technique of data acquisition. By means of a list of abbreviations, the typical entry "0A0" may be decoded to find that a two-electrode cell was used, that deaeration was accomplished with a stream of inert gas, and that the data were recorded on a pen-and-ink recorder. Inert gases are not identified because that would, In our judgment, consume more space than it would be worth, but they do not include hydrogen because hydrogen is sometimes not inert ... 

Figure 6. An overview of metabolic relationships. The arrows indicate dominant directions of carbon flow in, for example, a growing algal nnicell. Most of the pathways indicated are, however, found in nearly all living organisms and are reversible to some degree. The three-letter abbreviations designate amino acids and are decoded in Table 1. As indicated, isoprenoid hpids can be made from either C2 (acetyl-CoA) or C3 precursors (see discussions of Table 4 and Fig.

The main problem in natural-language text decoding is dealing with homographs, whether tiiey be accidental, part-of-speech or abbreviation homographs. Many systems choose to handle each of these separately, and in particular abbreviation homographs are often dealt with at the same time or in the same module as semiotic classification. 

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