Scheffersomyces stipitis (Pignal) Kurtzman et Suzuki
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ATCC highly recommends that appropriate personal protective equipment is always used when handling vials. For cultures that require storage in liquid nitrogen, it is important to note that some vials may leak when submersed in liquid nitrogen and will slowly fill with liquid nitrogen. Upon thawing, the conversion of the liquid nitrogen back to its gas phase may result in the vial exploding or blowing off its cap with dangerous force creating flying debris. Unless necessary, ATCC recommends that these cultures be stored in the vapor phase of liquid nitrogen rather than submersed in liquid nitrogen.
Potential biofuel production agent: lignocellulosic ethanol
1. To thaw a frozen ampoule, place in a 2530 °C water bath, until just thawed (approximately 5 minutes). Immerse the ampoule just sufficient to cover the frozen material. Do not agitate the ampoule.
2. Immediately after thawing, wipe down ampoule with 70% ethanol and aseptically transfer 10 microliter (or any amount desired up to all) of the content onto a plate or broth with medium recommended.
3. Incubate the inoculum/strain at the temperature and conditions recommended.
4. Inspect for growth of the inoculum/strain regularly. The sign of viability is noticeable typically after 1-2 days of incubation. However, the time necessary for significant growth will vary from strain to strain.
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Jeng RS, et al. Isoenzyme and protein patterns of pentose-fermenting yeasts. Can. J. Microbiol. 33: 1017-1023, 1987.
Wayman M, et al. SO2-catalysed prehydrolysis of coniferous wood for ethanol production. Biotechnol. Lett. 8: 749-752, 1986.
Wayman M, et al. Ethanol fermentation by Pichia stipitis of combined pentose and hexose sugars from lignocellulosics prehydrolysed by SO2 and enzymatically saccharified. Process Biochem. 22: 55-59, 1987.