Draft:Notations
Notations may be a series or system of written symbols used to represent numbers, amounts, or elements in something such as music or mathematics.
Contents
Astronomy[edit]
Notation: let the symbol indicate the Draft:Earth.
Notation: let the symbol ʘ or indicate the Sun.
Notation: let the symbol indicate the total solar irradiance.
Notation: let the symbol indicate the solar visible luminosity.
Notation: let the symbol indicate the solar bolometric luminosity.
Notation: let the symbol indicate the solar bolometric luminosity.
Notation: let the symbol represent the bolometric magnitude, the total energy output.
Notation: let the symbol represent the visual magnitude.
Notation: let the symbol indicate the solar mass.
Notation: let the symbol represent the net solar charge.
Notation: let the symbol indicate the Earth's radius.
Notation: let the symbol indicate the radius of Jupiter.
Notation: let the symbol indicate the solar radius.
Transcriptions start sites[edit]
Notation: let the symbol bp indicate a nitrogenous nucleobase pair as linked by a hydrogen bond between the two antiparallel helices that compose DNA.
Notation: let the symbol nt indicate a nucleotide.
Notation: for the coding of individual nucleobases along a DNA strand, the following letters are standardized by convention:
 adenine  A,
 cytosine  C,
 guanine  G, and
 thymine  T.
Notation: let the subscript (+1) indicate the specific nucleobase along the template strand that is a transcription start site. For example, A_{+1}.
Degenerate nucleotides[edit]
Alphabetically,
IUPAC nucleotide code  Base 

A  Adenine 
B  C or G or T (U) [not A] 
C  Cytosine 
D  A or G or T (U) [not C] 
G  Guanine 
H  A or C or T (U) [not G] 
K  G or T (U) [Keto] 
M  A or C [aMine] 
N  aNy base 
R  A or G [puRine] 
S  G or C [Strong] 
T (or U in RNA)  Thymine (or Uracil) 
V  A or C or G [not T] 
W  A or T (U) [Weak] 
X^{[1]}  N, aNy base 
Y  C or T (U) [pYrimidine] 
The International Union of Pure and Applied Chemistry (IUPAC) is an international federation of National Adhering Organizations that represents chemists in individual countries. IUPAC's Interdivisional Committee on Nomenclature and Symbols (IUPAC nomenclature) is the recognized world authority in developing standards for the naming of the chemical elements and compounds. Some important work IUPAC has done in these fields includes standardizing nucleotide base sequence code names.
Symbol^{[2]}  Description  Bases represented  

A  adenosine  A  1  
C  cytidine  C  
G  guanosine  G  
T  thymidine  T  
U  uridine  U  
W  weak  A  T  2  
S  strong  C  G  
M  [Amine] amino  A  C  
K  [Ketone] keto  G  T  
R  [Purine] purine  A  G  
Y  [Pyrimidine] pyrimidine  C  T  
B  not A (B comes after A)  C  G  T  3  
D  not C (D comes after C)  A  G  T  
H  not G (H comes after G)  A  C  T  
V  not T (V comes after T and U)  A  C  G  
N or   any base (not a gap)  A  C  G  T  4 
These nucleotide notations are an International Union of Pure and Applied Chemistry (IUPAC)^{[2]} representation for a position on a DNA sequence that can be have multiple possible alternatives.
Semantics[edit]
Notation: let the symbol Def. indicate that a definition is following.
Pragmatics[edit]
Notation: let the symbols between [ and ] be replacement for that portion of a quoted text.
Notation: let the symbol ... indicate unneeded portion of a quoted text.
Sometimes these are combined as [...] to indicate that text has been replaced by ....
Theoretical notations[edit]
Notational locations Weight Oversymbol Exponent Coefficient Variable Operation Number Range Index
For each of the notational locations around the central Variable, conventions are often set by consensus as to use. For example, Exponent is often used as an exponent to a number or variable: 2^{2} or x^{2}.
In the Notations at the top of this section, Index is replaced by symbols for the Sun (ʘ), Draft:Earth (), or can be for Jupiter (J) such as .
A common Oversymbol is one for the average .
Operation may be replaced by a function, for example.
All notational locations could look something like
bx x = n a f(x) n → ∞
where the center line means "a x Σ f(x)" for all added up values of f(x) when x = n from say 0 to infinity with each term in the sum before summation multiplied by bn, then divided by n for an average whenever n is finite.
Mathematics[edit]
Sciences[edit]
Scientific notation (more commonly known as standard form) is a way of writing numbers that are too big or too small to be conveniently written in decimal form. Scientific notation has a number of useful properties and is commonly used in calculators and by scientists, mathematicians and engineers.
Standard decimal notation  Normalized scientific notation 

2  2×100 
300  3×102 
4,321.768  4.321768×103 
53,000  −5.3×104 
6,720,000,000  6.72×109 
0.2  2×10−1 
0.000 000 007 51  7.51×10−9 
A metric prefix or SI prefix is a unit prefix that precedes a basic unit of measure to indicate a decadic multiple or fraction of the unit. Each prefix has a unique symbol that is prepended to the unit symbol.
Metric prefixes  


Hypotheses[edit]
 Ancient languages may have been little more than notations.
See also[edit]
References[edit]
 ↑ G. P. Moss (1992). Nomenclature for Incompletely Specified Bases in Nucleic Acid Sequences. Department of Chemistry, Queen Mary University of London, Mile End Road, London, E1 4NS, UK: Nomenclature Committee of the International Union of Biochemistry (NCIUB). Retrieved 20170902.
 ↑ ^{2.0} ^{2.1} Nomenclature Committee of the International Union of Biochemistry (NCIUB) (1984). Nomenclature for Incompletely Specified Bases in Nucleic Acid Sequences. Retrieved 20080204.
External links[edit]
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