pdb-l: Rapid protein separation
Fred Tepper
fred@argonide.com
Mon, 28 Oct 2002 14:17:56 -0500
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Dear Colleagues:
We have developed a fibrous filter (about 1.3 mm thick) capable of =
excluding > 6 logs of virus size particles at flow velocities of about =
0.5 to 1 cm/sec, or about 500 times faster than an ultraporous (virus =
rated) membrane. The active component is AlOOH nanofibers (about 2 nm =
diameter) that are electropositive. Since the filter behaves as a depth =
filter, it has a high capacity for sub-micron particles and is rather =
resistant to clogging. The microbials can be desorbed intact. It is =
capable of very efficient removal of nucleic acids, but these are rather =
tenaciously held.=20
Proteins are readily adsorbed at or near neutral solutions, even in 0.5 =
M saline. A stack of (5) filters was used for chromatographic =
adsorption of proteins from diluted mouse serum. An adsorbed protein =
was regenerated intact with 0.5 M sodium carbonate or EDTA solution.=20
We believe the filter has applications for protein separation, =
identification and enrichment because of high efficiency and high flow =
capability. Does anyone know of someone with expertise in protein =
separation that might be interested in a collaboration on applications. =
We would appreciate any advice about this unusual material. =20
Please reply to me directly by e-mail or phone. =20
Fred Tepper
Argonide Corp.=20
407-322-2500
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<DIV><FONT face=3DArial size=3D2>Dear Colleagues:</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>We have developed a fibrous filter =
(about 1.3 mm=20
thick) capable of excluding > 6 logs of virus size particles at =
flow=20
velocities of about 0.5 to 1 cm/sec, or about 500 times faster than an=20
ultraporous (virus rated) membrane. The active component is AlOOH=20
nanofibers (about 2 nm diameter) that are electropositive. Since =
the=20
filter behaves as a depth filter, it has a high capacity for sub-micron=20
particles and is rather resistant to clogging. The microbials can =
be=20
desorbed intact. It is capable of very efficient removal of =
nucleic acids,=20
but these are rather tenaciously held. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Proteins are readily adsorbed at or =
near neutral=20
solutions, even in 0.5 M saline. </FONT><FONT =
face=3DArial=20
size=3D2>A stack of (5) filters was used for chromatographic=20
adsorption of proteins from diluted mouse =
serum. An=20
adsorbed protein was regenerated intact with 0.5 M sodium carbonate or =
EDTA=20
solution. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>We believe the filter has applications =
for protein=20
separation, identification and enrichment because of high efficiency and =
high=20
flow capability. Does anyone know of someone with expertise in =
protein=20
separation that might be interested in a collaboration on=20
applications. We would appreciate any advice about =
this=20
unusual material. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Please reply to me directly by =
e-mail or=20
phone. </FONT><FONT face=3DArial size=3D2> </FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Fred Tepper</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Argonide Corp. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>407-322-2500</FONT></DIV></BODY></HTML>
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