Data Item _diffrn_standards.decay_%
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General 
- Item name
- _diffrn_standards.decay_%
- Category name
- diffrn_standards
- Attribute name
- decay_%
- Required in PDB entries
- no
- Used in currrent PDB entries
- No
Item Description
The percentage decrease in the mean of the intensities
for the set of standard reflections from the start of the
measurement process to the end. This value usually
affords a measure of the overall decay in crystal quality
during the diffraction measurement process. Negative values
are used in exceptional instances where the final intensities
are greater than the initial ones.
Data Type 
- Data type code
- float
- Data type detail
- float item types are the subset of numbers that are the floating numbers.
- Primitive data type code
- numb
- Regular expression
- -?(([0-9]+)[.]?|([0-9]*[.][0-9]+))([(][0-9]+[)])?([eE][+-]?[0-9]+)?
Allowed Boundary Conditions
| Minimum Value | Maximum Value |
|---|---|
-∞ |
100.0 |
Aliases
| Alias Item Name | Dictionary Name | Dictionary Version |
|---|---|---|
| _diffrn_standards_decay_% | cif_core.dic | 2.0.1 |