Especially developed for studying interactions in biological systems
DeltaPi series of Langmuir-tensiometers allow you to detect the penetration of drugs, peptides/proteins and nucleic acids into monolayers of specified lipid composition and at precisely controlled lateral packing density. The volume of the magnetically stirred subphase is minimally 150 microliters, which keeps your material consumption very low. One milligram of an antimicrobial peptide, for instance, is sufficient for a comprehensive characterization of its lipid-binding properties. Further, the choice of materials eliminates unwanted non-specific surface effects.
DeltaPi is a single-channel model, while DeltaPi-4 is equipped with four parallel microbalances, increasing significantly the throughput of experiments. When you are in a hurry and need to generate data fast, DeltaPi-4 is your choice. Both instruments measure surface tension with Kibron’s thin wire probes (DyneProbes) from small subphase volumes. They are compact and have an open and robust construction, easy to clean and maintain, operated with our intuitive software, DeltaGraph.
|Principle||Wilhelmy method using a small diameter ( 0.51 mm) special alloy wire. No artefactual hysteresis as when using the conventional Pt-plates. No drying and accumulation of salt which cause significant errors when filter paper is used.|
|Dynamic range||0 to 300 mN/m|
|Temperature sensor||Automatic monitoring and display of temperature in the course of the experiment, resolution 0.1 degrees (optional feature)|
|Temperature control||A heat control plate which connects to a circulating heat bath is available as an optional feature|
|Volume||300 µl in surface pressure measurements. Subphase can be magnetically stirred.|