Alphabet, letters

Patis Numheting. Parts shall he completely identified with a numerical system (no alphabetical letters) to facilitate parts inventory control and stocking. Each part shall he properly identified by a separate number, and those parts that are identical shall have the same number to effect minimum spare parts inventory. 

As you have probably already noticed, Excel uses alphabetical letters for the column index and numbers for the row index in order to specify a cell on the spreadsheet. The column index appears before the row index, e.g. cell A3 refers to column A row 3. This is contrary to the general convention as introduced earlier and, if desired, you can change Excel s default settings (T ools-Options-General) to accommodate a row-column notation. The notation A3 will then be altered into R3C1 (row 3, column 1). 

The nosology for CYP enzymes involves grouping into families and subfamilies according to structural similarity. All CYP enzymes in the same family have at least 40% structural similarity, and those in the same subfamily have at least 60% structural similarity. The family is designated by the first Arabic number, the subfamily by an alphabetic letter, and the trailing Arabic number designates the gene that codes for a specific CYP enzyme (10, 35, 51). 

CYP enzymes are grouped into families and subfamilies based on amino acid homology, because function follows structure ( 487). Families are designated by the first Arabic number and subfamilies by the alphabetic letter. To be in the same family and subfamily, the enzymes must have at least 40% and 60% sequence homology, respectively. The last Arabic number identifies a given enzyme, which is a specific gene product. 

In this area, a unique nomenclature system has gradually developed where differing rings are assigned alphabetical letters. The E-ring contains the diamine backbone, and this effectively defines a meridional plane in the octahedron. Chelate rings within this plane are the G... 

The nuclei under the influence of the second perturbing field are denoted by the last Latin alphabet letters, and the observed nuclei by the initial ones. (25)... 

Structures are identified in text with boldface numerals (either arabic or roman), boldface alphabet letters (capital or lowercase), or a combination of... 

The picture of molecules being composed of structural units, functional groups , which behave similarly in different molecules forms the very basis of organic chemistry. The drawing of molecular structures where alphabetic letters represent atoms and lines represent bonds is used universally. Organic chemists often build ball and stick, or CPK space-filling, models of their molecules to examine their shapes Force, field methods are... 

Reactions can be labeled in the same sequence as mathematical equations, with lightface numerals or alphabet letters or combinations of them in parentheses at the right margin. Depending on the complexity of the material, you may use one set of sequential labels for both chemical reactions and mathematical equations, or two separate but different numbering sequences (e.g., eqs 1,2,3,... and reactions I, II, III,. ..). Do not confuse structure labels with reaction labels. 

---