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General
Where is my login information?
What are your standard lead times?
What type of payment do you accept?
What is your return policy?
General Filtration
What is a membrane filter?
What is the maximum temperature for the different filter membranes?
What is hydrophilic vs hydrophobic membrane?
How is the performance of a filter measured?
What variables affect the performance of a filter?
How are pore sizes rated?
How is pore size determined?
What is the maximum operating pressure for the Capsule filters?
What is the difference between nominal and absolute pore size ratings?
What organisms are used to determine pore size?
What is a bubble point test?
How many times can the Capsule filters be autoclaved?
What is a KD (kiloDalton)?
Are Sterlitech Syringe Filters certified pyrogen free?
Can I filter aqueous solutions through a polytetrafluoroethylene (PTFE) hydrophobic membrane?
I am interested in gridded, sterile membranes, but I am concerned about the high costs of shipping Nitrocellulose internationally. Do you have other types of membranes that can be used?
Can my Nylon membranes be treated exactly like Nitrocellulose during colony hybridization?
Which membrane is recommended for size characterization analysis?
We would like to filter fluids and wonder which membrane to use for cytology?
Which membranes are recommended for gravimetric analysis?
Why does Epifluorescent microscopy work?
What membrane has been used to prevent water vapor from passing, but would allow regular air to pass?
What is the shelf life of your membranes?
Is your Cellullose Acetate (CA) membrane made of mono-, di-, or triacetate?
What is the difference between cellulose and "regenerated" cellulose?
What is the amount of Lignin, if any, in the Cellulose Acetate membranes?
What is the function of a binder in the glass fiber filter?
What is the thickness of the polypropylene membranes?
Silver Membrane Filters
What is the shelf life of silver metal membranes?
What if my membrane is slightly discolored?
What NIOSH Standards are Silver Membranes specified for?
Can silver metal membranes be cleaned?
What are the specifications for the silver metal membranes?
What are the advantages of silver metal membranes over conventional membranes?
What are the Silver Membrane lead times?
Track Etch Membranes
What is a Polycarbonate or Polyester Track Etch filter membrane?
What are the benefits of using Sterlitech Polycarbonate or Polyester filter membranes?
Will Sterlitech Track Etch filter membranes keep liquid behind the filter and let gases pass through?
Do Sterlitech Track Etch filter membranes have any type of wetting agent on them?
What materials can I use to dissolve Polycarbonate or Polyester membranes?
Can Polycarbonate membrane be bonded with adhesives?
How clear are the PCTE membrane filters? I am interested in looking at them under an optical microscope.
Do cells adhere to the surface of the Sterlitech track etch membranes?
Should I use the shiny or dull side of the membrane?
I am looking for a black polycarbonate membrane pore size that is not listed. Can I dye the standard polycarbonate membrane? How do I do this?
Do you have a method for coating the PVP-Free Polycarbonate membranes for Chemotaxis?
Why offer both polyester and polycarbonate track-etch filter membranes?
I am having a problem when I force liquids under pressure through a membrane with a very small pore size. Little or no liquid is seen to pass through the membrane, what could be the problem?
I just received a box of Sterlitech Track-Etch filter membranes and I am trying to use them, but there is no liquid passing through. What is wrong?
We would like a higher density Polycarbonate membrane (PCTE). Is it available?
Are the polycarbonate and polyester track-etch membranes biocompatible?
What membrane works best for cell studies?
Is there any way I can get rid of the pores on Sterlitech's Track-Etch filter membranes?
I need to take the PVP off my Polycarbonate membrane, is there any way I can do that?
Why are black polycarbonate membranes better than other membranes for counting bacteria?
HP4750 Stirred Cell
What size membrane does the HP4750 Stirred Cell use?
What material is the HP4750 Stirred Cell made out of?
What type of stir plate do you recommend for use with the HP4750 Stirred Cell?
What do I do to release the pressure on the HP4750 Stirred Cell?
Can I cut a membrane for use in the HP4750?
Sepa CF Cell
What is the difference between Sepa CF and Sterlitech HP4750?
Does the feed spacer penetrate the membrane?
How do I calculate Reynolds number based on the feed cross-flow velocities for the various feed spacers?
How do I distinguish between the low foulant (34ml) feed spacer and the high foulant (68ml) feed spacer when I hold them in my hands?
Is the low foulant spacer the same as the permeate carrier?
In the instruction manual of the Sepa CF, tubular and mesh spacers are mentioned. Can I conclude that the tubular is the low foulant and the mesh is the high foulant?
Could the filter cloth of industrial filters be used in the Sepa filtrations units, after cutting it to proper size?
How is the Sepa System repassivated?
Can I use the Sepa CF membrane cell without spacers?
How can I set the maximum flow from my Sepa CF?
What is the definition of GFD?
Will there be a difference in flow rate on the Sepa CF if it is run continuously or in intervals?
What fluid do I use in my Hydraulic hand pump for my Sepa CF?
What is the proper way to store the membranes for the Sepa CF after they have been used?
Flat Sheet Membranes
The Flat Sheet Membranes appear dry in their packaging. How do I pre-wet them? Do I need to do this?
What do I do to store the membranes after I use them?
Do you have any information on the storage of the MX series of membranes?
I have a DK series and wonder if there is a shelf life?
How can I store the membranes?