Half-Baffle TUNAIR™ Polypropylene Erlenmeyer Flask Kit, 2.5 Liters

Model Number SS-6002C

  • Item Description
  • Specifications
  • Technical Information
  • Comes complete withfour (4) polypropylene2.5L Half-Baffle TUNAIR™ Shake Flasks,four (4) two-piece caps, and five (5) dri-gauze filters.

The TUNAIR™ Polypropylene Flask Systems are a unique and patented flask and closure system, designed for microbiology and biotechnology applications. This system provides optimum growth conditions for aerobic microorganisms, mammalian cells, and plant cells. They also provide better culture growth and productivity than standard Erlenmeyer flasks. The TUNAIR™’s high oxygen absorption rate is due to the unique baffling and turbo-vane closure design. The TUNAIR™ systems are designed to increase the availability of dissolved oxygen as well as improve cell yields.

The Half-Baffle Shaker Flask has two baffles that produce a vortex motion. The working volume is 1L.

The Dri-Gauze filter is 0.22 micron and constructed of nitrocellulose. Each filter can be used 10 - 12 times. The Dri-Gauze filters can beautoclaved in the cap and left in place until a new filter is needed. The Dri-Gauze filters cannot be cleaned.

The flasks are constructed of polypropylene and resistant to most solvents.

All TUNAIR™ flasks and caps can be cleaned by soaking in water with a light detergent solution to loosenparticulates and contaminants, then air dry.

Flask Dimensions:
Flask Size: 2.5L
Working Volume: 1L
Base Diameter: 6.50” [16.51cm]
Neck Diameter: 3.00” [7.62cm]
Height: 10.75” [27.31cm]

Height With Cap in Place= 12.75"
Weight: 0.02 lbs. [0.008Kg]

Half-Baffle (2 Baffles): Vortex Motion

Shaker Speed:
1” Throws: 300-400rpm or possibly higher
2” Throws: 150-200rpm or possibly higher

All TUNAIR flasks and caps are constructed of chemical resistant polypropylene. All flasks and caps are fully autoclavable.

All TUNAIR flasks and caps can be cleaned by soaking in water with a light detergent (i.e. Joy) solution to loosen dirt and contaminants; air dry. All TUNAIR flasks and caps can be autoclaved, if required.

Cell Growth Evaluation of Commonly Used Shake Flasks

TUNAIR™ flasks were compared to conventional flasks using four different types of microorganisms;Escherichia coli,Saccharomyces cerevisiae,Penicillium avellaneum, andStreptomyces chartreusis. The aeration capacities of the shake flasks were determined by the sulfate oxidation method, and the values shown below are presented as oxygen absorption rate (OAR) in mM oxygen/L/Min. The growth rates ofE.coliandS.cerevisiaewere expressed as optical densities (OD) at 555mM. ForS.chartreusisandP.avellaneumgrowth rates were evaluated by percent sedimentation. ForE.coliandS.cerevisiae, the growth rates were determined after an 18-hour incubation period; forS.charteusis, a 24-hour incubation period; and forP.avellaneum, a 72-hour incubation period. Growth and OAR evaluations were carried out with 3-9 replicates and statistically analyzed using Turkey’s w-procedure. See results below.

Growth Evaluation of Four (4) Microbial Types in TUNAIR™ Flasks vs. Other Currently Used Shake Flasks
OAR Value OD @ 555mM % Sedimentation
Flask mM O2/L/Min. E.coli S.cerevisiae S.chartreusis P.aveilaneum
TUNAIR™ Full-Baffle 4.25 7.09 5.63 19.7 3.3M
TUNAIR™ Half-Baffle 1.22 5.36 5.57 27.73 30.50P
Triple Indented Flasks 2.47 5.97 5.31 19.20 9.50MP
Unbaffled Erlenmeyer 0.52 5.97 5.19 17.37 25.10P

*Growth Morphology: M, mycelial; P, pellet; MP, mixed mycelial. The mycelial growths mostly adhered to the walls of the flask, which accounted for the low overall sedimentation value.

Reference Papers:

1.Method to Increase the Yield of Eukaryotic Membrane Protein Expression inSaccharomyces Cerevisiae

2.Optimisation of Recombinant Production of Active Human Cardiac SERCA2a ATPase

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