TT8 rev cell disruption

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					           CELL DISRUPTION




                                                                                                               Permit No. 910
                                                                                          U.S.Postage
          for fun and profit!




                                                                                                                 Clifton, NJ
                                                                                            Prsrt Std

                                                                                                        PAID




                                                                                                                                                             GM71/2003
Whether your needs (and budget!) are for
disrupting a single vial of organic material or the
continuous disruption of yeast or E. Coli, GLEN
MILLS has a machine to fit the bill:
Shaker-style bead mills                 HIGH SPEED
                                        MIXER MILL
• High Speed Mixer Mills
• Bead Beaters




                                                                                                                                                                                                              THE GRINDING GUY
• Geno/Grinder™
These mills use a violent shaking
action, either side-to-side (wrist-
like) or up-and-down to produce rapid cell
                                                                                                                                                                                    Glen
disruption in single 2ml vials, multiple small vials,
96-well titer plates or jars as big as 50ml.
Ultrasonic Liquid Processors
                                                                                                                                                                                    Mills’
• Sonicator®
• Sonitube™
A piezoelectric cell vibrating at
                                      SONITUBE

                                                                                                                                                                                    guide
ultrasonic frequencies creates
a rapid mechanical movement
of a submerged disruptor. This
in turn causes localized
                                                                                                                                                                                    to size
cavitation producing huge shear
forces, breaking apart even the toughest cell.
The Sonicator is a batch machine, while the
                                                                                                                                                                                    reduction.
Sonitube is used in a continuous mode.
                                                                                                                                                                                    •   Common terms
Horizontal bead mills
                                                                                                                        ADDRESS SERVICE REQUESTED




• Dyno®-Mill
The combination of a high
                                        DYNO-MILL
                                        MULTILAB                                                                                                                                    •   FAQ’s

                                                                                                                                                    Please visit our web site for
                                                                                                                                                                                    •   Choosing the
                                                                                        www.glenmills.com




speed rotor with agitator
                                                                                        Clifton, NJ 07012
                                                                                        395 Allwood Road




discs and small glass or


                                                                                                                                                    Tech Tip back issues
ceramic grinding media
                                                                                                                                                                                        right mill
                                                                                        Glen Mills Inc.




produces hurricane-like
forces that will disrupt cells                                                                                                                                                                Tech Tips 8.0
in either small 150ml batches or continuously at
flow rates up to 40 liters/hour.

All copyrighted and trademarked names remain the property of their respective owners.
         Common Terms
         Common                                                                 FAQ’s                                  Choosing the right mill
Coarse grind. The classic understanding of a             Q. How fine can I grind with one machine?                    Q. What’s the best mill for my application?
coarse grind was anywhere between an inch and a          A. A good rule of thumb to use is to assume that one         A. It all depends....on the characteristics of the
foot! We think of anything bigger than 1mm as            mill is capable of size reduction in the range of 10-        material to be ground (is it soft, hard, brittle, fi-
being coarse.                                            15:1, so one machine might process 50mm chunks               brous, temperature sensitive, etc.), how fine you
                                                         down to 5mm but not down to 50 microns (0.05mm).             need to grind, how much material you need to grind,
Fine grind. Commonly used to                                             The other big factor is the behavior of      materials of construction required to minimize
describe between 10-50 microns.                                             the material itself - some materials      contamination, budget considerations and other
Ultra-fine is generally regarded as                                         will exceed this rule if it is friable;   factors. The reality is that there is NO universal mill
being single digit microns and                                               others will quickly reach a size         that will handle all materials with all the possible
below.                                                                       where further reduction is almost        size ranges and batch sizes. Some come close, but
                                                                             impossible without enormous              all have their limitations.
Grinding aid. Something                                                      expenditures of energy.
added to the material being ground to help                                                                      Q. So how do I choose the right mill?
with the grinding process. It could be a few                       Q. What’s the difference between “grinding”, A. You work very closely with the helpful experts
drops of a liquid to aid the grinding in a ball
                                                                  “milling”, “comminuting”, “micronizing”,            from GLEN MILLS! They will run trials on one or
mill or some magnesium stearate to prevent
                                                                  “atomizing”, “crushing” and “pulverizing”?          more mills to assist with the selection process.
caking in a hammer mill.
                                                  Cross
                                                                  A. Not a lot! The words themselves may              Before purchase you can rent a mill and run exten-
Grinding media. The generic term given Beater Mill                have different derivations but all refer to the     sive trials in your own lab.
                                                  Coarse          creation of small particles from bigger ones.       Call 973-777-0777 or e-mail
to the material that allows the force of a ball grinding
mill to act upon the material to be processed                     “Grinding” and “milling” have become                       staff@glenmills.com to discuss your
- the “ball” in ball mill or “bead” in bead mill.                 virtually interchangeable. The other
                                                                                                                               application
                                                        words convey a sense of scale; “comminuting”,
Mesh. The actual woven, interlocking fabric in a “micronizing” and “atomizing” normally refer to
sieve which is commonly used to designate a             the creation of micron-sized particles; “pulveriz-
particle size. Anything that falls through the mesh     ing” and “crushing” are normally used to
is said to be minus (mesh size); anything that stays    discuss larger pieces.
on top is plus (mesh size). Common standards
include ASTM and Tyler (for more details refer to the    Q. When would I use a wet grinding                                             Glen Mills Inc.
Sieving section on our web site).                        method over a dry grinding method?
                                                         A. For a product that will be used                                         Tel: 973-777-0777
Micron. A small measured distance equal to               wet it makes sense to grind it wet
1/1000th of a millimeter used to describe the            rather than dry it, grind it and wet it                                    Fax: 973-777-0070
particle size of powders. Common bacteria are            again. Wet grinding helps to reduce Electric Mortar Grinder
about 1 micron in size.                                  dust and contamination hazards. Also
                                                                                                  Fine grinding
                                                                                                                             www.glenmills.com
                                                         if very small particles are required (single digit micron
Nanometer. A really small measured distance              and less) wet grinding is one of only a few methods to          staff@glenmills.com
equal to 1/1000th of a micron, 1 billionth of a          give consistent results (another option is jet milling).
meter, about 10 atoms placed side by side.

				
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posted:4/27/2010
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