| column chromatography |
is the oldest chromatographic technique. The apparatus consists of a glass tube (approximately about 20mm ( 250mm) which has a glass frit at the bottom of the tube and a stopcock. A thin layer of coarse, clean sand is placed over the frit, and the chosen adsorbent (usually alumina or silica) is then placed in the tube as a slurry. The sample under analysis (ie the mixture) is poured into the top of the column and continuously washed through with an eluting solvent. Fractions are collected. ...
출처: www.ucc.ie/ucc/depts/chem/dolchem/html/dict/000c2....
|
|---|---|
| column |
A column is a sub-land unit patch representing particular plant functional types. Each "regular" land unit contains one or more columns corresponding to the number of plant functional types within the land unit. "Special" land units consist of a single column.
출처: www.cgd.ucar.edu/tss/clm/distribution/lnd_reqdoc/n...
|
| column |
A vertical support, usually supporting a member above.
출처: www.eastrow.org/design_review/glossary.html
|
| column |
A column is a distinct field in a table that has a specific data type.
출처: www.rtlabs.com/macsql/manual3/glossary/main.html
|