COLUMN CHROMATOGRAPHY docx

... 1. Schematic diagram of the principles of chromatography as discovered by Tswett (1901). Column Chromatography 2 2. Ion chromatography Classical liquid chromatography based on adsorption- desorption ... Similar to liquid chromatography, ion chromatography utilizes a liquid mobile phase, a separation column and a detector to measure the species eluted from the column. Ion- exch...

Ngày tải lên: 17/03/2014, 02:20

... Business Rules with Column Expressions Problem You need to enforce a business rule based on multiple columns in a table at the user interface tier. Solution Use expression-based columns to enforce ... EnforceBusinessRulesWithColumnExpressionsForm_Load( object sender, System.EventArgs e) { DataColumnCollection cols; // Build the table. dt = new DataTable(TABLENAME); cols =...

Ngày tải lên: 21/01/2014, 11:20

... of DataColumnMapping objects in its DataColumnMappingCollection that are accessed through its ColumnMappings property. These objects map the name of a column in the data source to a column ... "tblmapCategories"); // Create the column mappings for the Categories table. dtm.ColumnMappings.Add("CategoryID", "colmapCategoryID"); dtm.ColumnMappings.Add(&qu...

Ngày tải lên: 14/12/2013, 18:16

... Introduction Limitations of single -column systems 9.1.1 9.1.2 Multi -column systems 9.1.3 Multi -column chromatography 9.1.3.1 Definition 9.1.3.2 Variants of column switching Selectivity ... (similar to the standard 5 pm columns). These columns are also much more expensive than standard columns [99]. The more practical options are the 4.6 mm i.d. columns (p...

Ngày tải lên: 21/02/2014, 01:21

... ater 10 : 40 : 50 (v/v/v). High performance liquid chromatography Protein s eparation by HPLC was performed using a reversed phase Vydac Protein C-4 column (250 · 4.6 mm internal diameter 5 , The ... delivery pumps. Samples were introduced onto the column by a Model 210 A sample injection valve with either a 20- or a 50-lL sample l oop. The V ydac C-4 columns were pre-equilibrated with...

Ngày tải lên: 08/03/2014, 16:20

... the GC column with solvent according to manufacturer's instructions. 525.2-23 10.3.6.4 Break off a short portion (about 1 m) of the column from the end near the injector; or replace GC column. ... 525.2 DETERMINATION OF ORGANIC COMPOUNDS IN DRINKING WATER BY LIQUID-SOLID EXTRACTION AND CAPILLARY COLUMN GAS CHROMATOGRAPHY/ MASS SPECTROMETRY Revision 2.0 J.W. Eichelberger, T.D. Beh...

Ngày tải lên: 22/03/2014, 14:20

... ex- tremely common operation in a column store. Naive column- stores [13, 14] store data on disk (or in memory) column- by -column, read in (to CPU from disk or memory) only those columns relevant for a particular ... three columns will result in a contiguous set of results (or a range predicate on the sorted column) . As another example, the supplier table has a region column, a nation...

Ngày tải lên: 30/03/2014, 13:20

Ngày tải lên: 07/08/2012, 01:37

Ngày tải lên: 07/08/2012, 01:49