Clippard Solenoid-Operated PTFE Media Gradient Isolation Valves

We Have Protection Down to a Science

A Guide To Freeze Drying for the Laboratory

There are, however, many other uses for the process including heat-sensitive sample preparation, plant material research, the stabilization of living materials such as microbial cultures, long term storage of HPLC samples, preservation of whole animal specimens for museum display, restoration of books and other items damaged by water, and the concentration and recovery of reaction products.

Dos & Don'ts of Fume Hood Operation

In a laboratory, the fume hood is the primary control device for protecting workers using flammable and/or toxic chemicals. OSHA's laboratory standard (29 CFR 1910.1450) requires that fume hoods be maintained and function properly when used.

Thermal Field-Flow Fractionation of Polymers

Thermal field flow fractionation (TF3) is an exciting technique that provides a highly efficient method of separating and characterizing complex polymer samples such as natural or synthetic rubbers, starches and paints from approximately 5 kDa up to 1000 MDa and more in organic and aqueous solvents. The TF3 technique uses a temperature gradient as the driving force for its separation of polymers and particles. Molecules affected by the thermal gradient undergo diffusion which enables separation by both their molar mass and chemical composition. This unique feature allows the separation of different materials having the same molar mass. The separation can be further optimized by the use of different eluents and various temperature programs.

Mechanically Driven Diaphragm Pumps for Use with Gases

This 58-page booklet is intended to provide an overview of gas diaphragm pumps with mechanical drives, covering subjects such as their design, function, properties, and a comparison of diaphragm types. In addition, examples of applications and advice concerning selection of the right pump are included.

Thermal Field-Flow Fractionation of Polymers

Thermal field flow fractionation (TF3) is an exciting technique that provides a highly efficient method of separating and characterizing complex polymer samples such as natural or synthetic rubbers, starches and paints from approximately 5 kDa up to 1000 MDa and more in organic and aqueous solvents. The TF3 technique uses a temperature gradient as the driving force for its separation of polymers and particles. Molecules affected by the thermal gradient undergo diffusion which enables separation by both their molar mass and chemical composition. This unique feature allows the separation of different materials having the same molar mass. The separation can be further optimized by the use of different eluents and various temperature programs.