PMCCPMCCPMCC

Search tips
Search criteria 

Advanced

 
Logo of aemPermissionsJournals.ASM.orgJournalAEM ArticleJournal InfoAuthorsReviewers
 
Appl Environ Microbiol. 1977 August; 34(2): 150–154.
PMCID: PMC242613

Dry-heat resistance of selected psychrophiles.

Abstract

The dry-heat resistance characteristics of spores of psychrophilic organisms isolated from soil samples from the Viking spacecraft assembly areas at Cape Kennedy Space Flight Center, Cape Canaveral, Fla., were studied. Spore suspensions were produced, and dry-heat D values were determined for the microorganisms that demonstrated growth or survival under a simulated Martian environment. The dry-heat tests were carried out by using the planchet-boat-hot plate system at 110 and 125 degrees C with an ambient relative humidity of 50% at 22 degrees C. The spores evaluated had a relatively low resistance to dry heat. D(110 degrees C) values ranged from 7.5 to 122 min, whereas the D(123 degrees C) values ranged from less than 1.0 to 9.8 min.

Full text

Full text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (742K), or click on a page image below to browse page by page. Links to PubMed are also available for Selected References.

Selected References

These references are in PubMed. This may not be the complete list of references from this article.
  • Angelotti R, Maryanski JH, Butler TF, Peeler JT, Campbell JE. Influence of spore moisture content on the dry-heat resistance of Bacillus subtilis var. niger. Appl Microbiol. 1968 May;16(5):735–745. [PMC free article] [PubMed]
  • Brannen JP. Role of water activity in the dry heat sterilization of micro-organisms. J Theor Biol. 1971 Aug;32(2):331–334. [PubMed]
  • Brannen JP, Garst DM. Dry heat inactivation of Bacillus subtilis var. niger spores as a function of relative humidity. Appl Microbiol. 1972 Jun;23(6):1125–1130. [PMC free article] [PubMed]
  • Bruch MK, Smith FW. Dry heat resistance of spores of Bacillus subtilis var. niger on Kapton and Teflon Film at high temperatures. Appl Microbiol. 1968 Dec;16(12):1841–1846. [PMC free article] [PubMed]
  • Drummond DW, Pflug IJ. Dry-heat destruction of Bacillus subtilis spores on surfaces: effect of humidity in an open system. Appl Microbiol. 1970 Nov;20(5):805–809. [PMC free article] [PubMed]
  • Foster TL, Winans L., Jr Psychrophilic microorganisms from areas associated with the Viking spacecraft. Appl Microbiol. 1975 Oct;30(4):546–550. [PMC free article] [PubMed]
  • Hall LB, Bruch CW. Procedures necessary for the prevention of planetary contamination. Life Sci Space Res. 1965;3:48–62. [PubMed]
  • Howell DS, Muniz O, Pita JC, Arsenis C. Preliminary observations on phosphatases in articular cartilages. Arthritis Rheum. 1976 May-Jun;19 (Suppl 3):495–498. [PMC free article] [PubMed]
  • Murrell WG, Scott WJ. The heat resistance of bacterial spores at various water activities. J Gen Microbiol. 1966 Jun;43(3):411–425. [PubMed]
  • Pflug IJ. Planetary quarantine. Sterilization of space hardware. Environ Biol Med. 1971 May;1(1):63–81. [PubMed]
  • Pheil CG, Pflug IJ, Nicholas RC, Augustin JA. Effect of various gas atmospheres on destruction of microorganisms in dry heat. Appl Microbiol. 1967 Jan;15(1):120–124. [PMC free article] [PubMed]
  • Simko GJ, Devlin JD, Wardle MD. Dry-heat resistance of Bacillus subtilis var. niger spores on mated surfaces. Appl Microbiol. 1971 Oct;22(4):491–495. [PMC free article] [PubMed]

Articles from Applied and Environmental Microbiology are provided here courtesy of American Society for Microbiology (ASM)