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  • 1
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    Applications of mutant yeast strains with low glycogen storage capability (1981)
    In:  Other Sources
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    Publication Date: 2011-08-18
    Description: Several strains of Hansenula polymorpha were selected for possible low glycogen storage characteristics based on a selective I2 staining procedure. The levels of storage carbohydrates in the mutant strains were found to be 44-70% of the levels in the parent strain for cultures harvested in stationary phase. Similar differences generally were not found for cells harvested in exponential phase. Yeast strains deficient in glycogen storage capability are valuable in increasing the relative protein value of microbial biomass and also may provide significant cost savings in substrate utilization in fermentative processes.
    Keywords: LIFE SCIENCES (GENERAL)
    Type: Biotechnology and Bioengineering Symposia; 11, 1; 1981
    Format: text
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  • 2
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    Determining a carbohydrate profile for Hansenula polymorpha (1985)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Description: The determination of the levels of carbohydrates in the yeast Hansenula polymorpha required the development of new analytical procedures. Existing fractionation and analytical methods were adapted to deal with the problems involved with the lysis of whole cells. Using these new procedures, the complete carbohydrate profiles of H. polymorpha and selected mutant strains were determined and shown to correlate favourably with previously published results.
    Keywords: LIFE SCIENCES (GENERAL)
    Type: Enzyme and Microbial Technology (ISSN 0141-0229); 7; 339-345
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  • 3
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    An evaluation of microorganisms for unconventional food regeneration schemes in CELSS - Research recommendations (1982)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: The benefits and deficiencies of various candidates for a controlled ecological life support system (CELSS) for manned spacecraft missions of at least 3-14 yr are discussed. Conventional plants are considered unacceptable due to their inefficient production of foodstuffs and overproduction of stems and leafy matter. The alternate concepts are algae and/or bacteria or chemical synthesis of food. Microorganisms are considered the most promising because of their direct use of CO2 and possible utilization of waste streams. Yeasts are cited as the most viable candidates, since a large data base and experience already exists in the commercial food industry. The addition of hydrogen bactria and solar-grown algae is recommended, together with genetic manipulation experiments to tailor the microorganisms to production of foodstuffs closer to the 70 percent carbohydrate, 20 percent protein, and 10 percent lipid optimal food currently accepted. The yeast strain, Hansenula polymorpha, has been successfully grown in methanol and encouraged to produce a 55 percent carbohydrate content.
    Keywords: LIFE SCIENCES (GENERAL)
    Type: SAE PAPER 820852
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  • 4
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    Preliminary results of in vitro propagation of Guayule (1981)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: Guayule, Parthenium argentatum Gray, was first established in tissue culture by Bonner and Arreguin (1950) as a means to study the effects of various chemicals and extracts on rubber production. The propagation of whole guayule plants from tissue culture, however, has not been accomplished. The reported investigation is concerned with such an objective. In an attempt to stimulate rubber production in Guayule, Yokoyama et al. (1977) sprayed juvenile plants with 2-(3,4-dichloro-phenoxy)triethylamine (TEA derivative). This treatment resulted in increased isoprenoid levels in the plant tissue. In the current investigation, experiments were conducted to study the effect of TEA derivative on in vitro cultures. It was found that a suppression of callus formation occurs at a 10 mg/L concentration of TEA derivative with a resultant increase of shoot formation. Lower and higher concentrations of TEA derivative promote callus formation.
    Keywords: LIFE SCIENCES (GENERAL)
    Type: Journal of Agricultural and Food Chemistry; 29; 1981
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  • 5
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    Potential heat exchange fluids for use in sulfuric acid vaporizers (1981)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: A series of liquids have been screened as candidate heat exchange fluids for service in thermochemical cycles that involve the vaporization of sulfuric acid. The required chemical and physical criteria of the liquids is described with the results of some preliminary high temperature test data presented.
    Keywords: CHEMISTRY AND MATERIALS (GENERAL)
    Type: World Hydrogen Energy Conference; Jun 23, 1980 - Jun 26, 1980; Tokyo; Japan
    Format: text
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