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General designs

What is the main purpose of a chromatography column This question can be answered in several ways  [Pg.208]

Today we can find different established column designs. Concurrent technologies exist to lower and upper the piston like hydraulic pumps, manual moving, or an electrical motor. The different designs have different drawbacks and advantages, but have to obey the follovdng criteria  [Pg.208]

Chromatography columns have three basic components  [Pg.209]

Manually moved piston Generally used on column packed with low-pressure media, this technology could be applied on columns up to 600 mm. One of the advantages of this system is the reduction of column cost due to the fact that the use of automated technology is limited. This kind of system is often used in the biotechnology field for column packed with low-pressure bed which does not require high pressure for packing. [Pg.209]

Electrically or hydraulically moved piston In terms of column technology, there is a consensus today that the best (and probably only) feasible approach at any size is dynamic axial compression (DAC). The piston can be driven by a hydraulic jacket, or pushed by a liquid, by a spring, or by an electrical motor. Radial compression is an alternative but it does not seem to be available at (very) large column diameter sizes. It also requires the use of prepacked cartridges, thus reducing the operator s freedom compared to DAC. Under appropriate conditions, the DAC technology ensures bed stability and reproducible performance. DAC can be scaled-up to very large size with remarkable reproducibility in performance. This has been verifled with columns up to 1600 mm internal diameter. [Pg.209]


Submerged-Arc Furnace. Furnaces used for smelting and for certain electrochemical operations are similar in general design to the open-arc furnace in that they are usually three-phase, have three vertical electrode columns and a shell to contain the charge, but dkect current may also be utilised They are used in the production of phosphoms, calcium carbide, ferroalloys, siUcon, other metals and compounds (17), and numerous types of high temperature refractories. [Pg.123]

It should be noted that corrosion inhibitors and protection systems ate generally designed for specific conditions, and the effectiveness of the inhibitor can change with conditions. [Pg.10]

Numerical values for for use in the general design equation may be calculated from experimental data by... [Pg.1060]

The general design procedure consists of a number of steps to be taken into consideration. These include ... [Pg.2185]

Storage tanks are generally designed based upon the vapor pressure of their contents, and can range from low pressure (API-type) tanks to high pressure tanks for compressed gases or pressurized liquids. [Pg.36]

The circuit lends to interrupt at a normal current zero and causes no current chopping. A BOCB is generally designed with two breaks per pole that help in restoring the dielectric strength promptly during an arc interruption. [Pg.633]

A Generalized Design Approach to Power Supplies Introducing the Building-block Approach to Power Supply Design... [Pg.8]

From general design requirements, choose a switching regulator topology... [Pg.27]

The generalized design flow for the magnetic elements is as follows. [Pg.38]


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See also in sourсe #XX -- [ Pg.8 , Pg.12 ]




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General Design Procedure

General Design Recommendations

General Design Rules

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General Design Safety Checklist generally

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General comments on study designs in early phase clinical studies

General design aspects

General design basis

General design criteria

General design equations. Dimensionless groups

General design parameters

General library design

General requirements for design

General vessel design tips

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Generalized Mass Balance and Design Equations

Generalizing the Design

Joint design -general

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Molecule, design general framework

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Reactor design, general principles examples

Reactor design, general principles references

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The US general design criteria

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