Nasco

Dialysis is a popular technique used for the exchange of buffer medium across semi-permeable membranes. Dialysis devices are available in many configurations for research applications. We offer innovative dialysis devices and accessories for processing small samples. Small sample dialysis has become a routine technique in life science research. Today's major concern with dialysis devices is the loss of precious samples, due to leaking or precipitation of samples during dialysis. One common cause of sample loss is the accidental piercing of the fragile dialysis membrane with a sharp object, such as a needle. A second concern is the efficiency and rate of the dialysis. G-Biosciences manufactures a unique dialysis device that allows efficient dialysis and ensures 100% sample recovery, even if precipitation occurs. The Tube-O-DIALYZER mini dialysis system is designed for small sample volumes of 20 to 2.5ml. The unique, patented tube design of Tube-O-DIALYZER permits easy sample handling and manipulation, without the use of specialized loading devices, costly syringes or hazardous needles. This specialized tube format also allows for easy sample loading, as simple as transferring your sample to a microcentrifuge tube. For sample recovery, simply pipette your sample into the Tube-O-DIALYZER and seal with the dialysis cap. Dialyze, then centrifuge for five seconds to collect 100% of your sample. For storage of the dialyzed sample, replace the dialysis cap with the supplied storage cap. The Tube-O-DIALYZER tube comes in two ideal sizes; the Micro unit allows efficient dialysis of 20-250 samples and the Medi unit is optimized for samples between 0.2-2.5ml. Both sizes are available with membranes with molecular weight cutoffs (MWCO) of 1k, 4k, 8k, 15k, and 50k

Filter bags are made from extra-heavy polyethylene with a strong perimeter seal Bags have a third layer of finely perforated polyethylene that filters out solids in the sample. The filter layer is sealed into the perimeter of the bag on the sides and bottom, allowing the sample to be placed in the bag on either side. Bags should not be used at temperatures above 82C (180F). Bags can be frozen to any temperature. Careful handling required after freezing. Sterilized with ethylene oxide gas.