Mnemonic code

Zeolites are aluminosilicates characterized by a network of silicon and aluminum tetrahedra with the general formula Mx(A102)x(Si02)Y. The M are cations that are necessary to balance the formal negative charge on the aluminum atoms. The tetrahedra are linked to form repeating cavities or channels of well-defined size and shape. Materials with porous structures similar to zeolites but with other atoms in the framework (P, V, Ti, etc.), as a class are referred to as zeotypes. The structure committee of the International Zeolite Association (IZA http //www.iza-online.org/) has assigned, as of July 1st 2007, 176 framework codes (three capital letters) to these materials. These mnemonic codes do not depend on the composition (i.e. the distribution of different atom types) but only describe the three-dimensional labyrinth of framework atoms. 

Level 1 data categories cover nine areas. A six-digit numeric coding system (similar to MTM-V) is used to provide a detailed description of the operation being studied, each of which is documented with a specific MTM-1 motion pattern. Level 2 data are directly traceable to Level 1 rmd to MTM-1, which covers the same activities at a combined motion level. Distance ranges are reduced to one, and elements use simplified alphanumeric and mnemonic codes. 

The 20 different side chains that occur in proteins are shown in Panel 1.1 (pp. 6-7). Their names are abbreviated with both a three-letter and a one-letter code, which are also given in the panel. The one-letter codes are worth memorizing, as they are widely used in the literature. A mnemonic device for linking the one-letter code to the names of the amino acids is given in Panel 1.1. 

Mnemonic Sugar Position of hydroxyl groups C4 C3 C2 Binary code Decimal number... 

The subroutine MENU displays a list of mnemonics on the screen at predefined locations. In my code, these mnemonics are usually in a vertical stack, and they are all accompanied by a line of explanatory text per mnemonic. Use of the cursor keys causes a highlighted bar to step through the mnemonics. Pressing the RETURN key selects the option equivalent to the currently selected mnemonic. 

There will be no magic numbers (explicit, mysterious constants) in the code all symbols will be explicitly defined with mnemonics which are valid throughout the code. 

PDB-ID Codes. The structure record accessioning scheme of the Protein Data Bank is a unique four-character alphanumeric code, called a PDB-ID or PDB code. This scheme uses the digits 0 to 9 and the uppercase letters A to Z. This allows for over 1.3 million possible combinations and entries. Many older records have mnemonic names that make the structures easier to remember, such as 3INS, the record for insulin shown earlier. A different method is now being used to assign PDB-IDs, with the use of mnemonics apparently being abandoned. 

However, there is a big difference between the EXGAS notation and the CHEMKIN notation the first is an unambiguous coding of the developed molecular formula of a chemical species, which can therefore be "understood" by the computer, whereas the second notation is more of a "mnemonic" easily understood by the chemist who had defined it, but not by the computer. 

The items may be entered in any order. The computer will rearrange the features, in order, automatically. The blank margin above the spaces may be used for the convenience of the respondent (e.g., for mnemonics of the features). The coding structure yields a table of strains by features. 

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