DATABASE / Databases

Remove or Change Data

Removing and changing data is based on reading a database after all other databases.

The order in which databases are searched can be changed using the pull-down menu “Options / Data / Database files”. The order is important because for two species with the same name (but different logK° value), only the last one will be retained.

Single User (when there is a copy of DATABASE/SPANA installed on your computer):

• change a logK-value by entering the new value using the menu “Options / Data / Add data!”. A new logK-file (default name: New-Data.txt) and the corresponding element-file (New-Data.elt) are then created and these files are read after reading the binary database supplied with DATABASE. For two species with the same name (but different logK° value), only the last one read will be retained.
• remove components from the list for an element by adding a new component with the same name but preceeding the name with a “@” (in menu “Options / Data / Add data!”). For example, adding “@Fe 2+” linked to “Fe” removes Fe(II) from the components available for iron.
• remove reactions by adding a new species with the same name but inserting a “@” at the beginning of the name. For example, to remove the species “FeOH 2+” just add a species named “@FeOH 2+”. The logK° value is not used, because the species will be removed.

Running on a Network server:

• Each user may change or remove data as indicated above. The database New-Data is then saved locally on a user directory.
• To make collective changes and deletions of data if DATABASE has been installed on a network server, and all users run the same program file:
  • Create the database New-Data as indicated above for a single user.
  • Move then the files that you created (for example New-Data.elt and New-Data.txt) to the network directory where the DATABASE program is located.
  • Start the DATABASE program (from the network server) and use the pull-down menu “Options / Data / Database files” to add your new database (New-Data.txt, newly created and moved to the network folder) as the last database in the list. Then close the DATABASE program.
  The database list will be stored in the “ini”-file in the network directory. In this way the new data are then automatically used by all users. See also Installing and Uninstalling.