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| V&P Scientific has developed a simple and efficient method of placing sterile stir bars, dowels and discs (stir elements) into microplates with liquid already in them. Simply pour bulk stir elements into the appropriate dispenser, shake/swirl until each of the holes is filled, pour off excess stir elements, place over microplate and dispense (drop) stir elements into the wells. The Drop dispensers on this page are made from plastic material and can not be sterilized by autoclaving. They can be disinfected with bleach or alcohol.
A key factor in loading the stir elements into the dispensers is that they must not be magnetic. If they are magnetic they will stick together and not fill the depressions. A simple pass over the VP 781 demagnetizer removes all residual magnetic fields.
The latest version of the drop dispensers incorporate an anti-jam feature that prevents the stir elements from jamming the dispenser mechanism. Although they are slightly more expensive this mechanism will decrease loading time. All of the dispensers with a "-1" after the part number designate this new anti-jam version feature.
If you want to load magnetized Stir StiXs or magnetic stir bars you will need to use our Stir StiX dispensers.
Watch an instructional video of how to use our drop tumble stirrer dispensers
Download video (mpeg movie- 5MB)
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VP 720B |
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Stir Disc Dispenser for VP 722 Stir Discs - 96 well format |
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Stir Disc Dispenser for VP 724 Stir Discs - 384 well format |
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VP 733-2A-1 |
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Several different companies make tube racks or blocks with a variety of shapes and heights that do not align to the bottom of our dispensers. We have solved that problem by building a universal Collar Adaptor that aligns the rack to the bottom of the Stir Element Dispenser. |
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| We also offer flip and drop Autoclaveable dispensers. The flip dispenser are the most cost effective but they can only be used when it is possible to place the stir element in the well prior to adding liquid. The autoclavable drop dispenser can be used to add stir elements to wells after they contain liquid. They are the most expensive of the dispensers.
To see Autoclaveable Drop/Tumble Stir Element Dispensers please follow this hyperlink.
To see Autoclaveable Drop Stir StiX Dispensers please follow this hyperlink Watch an instructional video of how to use our drop tumble stirrer dispensers |
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| As the loading jig advances across the plenum, discs are dropped into each hole, an attached retaining lid prevents the magnets from moving about. This operation is done on top of a VP 770 magnetic block to facilitate the loading process and to pull the magnetic discs into the microplate when the loading plenum is pushed to the open position as demonstrated in the photo to the right.
Once dispensed, the magnetic discs are captured in the microplate with a plate lid and removed from the magnet.
When removed from the VP 770 the magnetic discs are attracted to discs in neighboring wells. When place on a V&P Tumble Stirrer they are attracted to the Stirrer's magnetic cylinder and begin to tumble independently.
Watch an instructional video of how to
use the VP 779-5A Download video (mpeg movie- 36MB)
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About |
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Copyright © 2007, V&P Scientific, Inc. All rights reserved.