ISSN:0027-5514    

DOI:10.1080/00275514.1953.12024246

出版商:Taylor&Francis    

年代:1953

数据来源: Taylor

摘要:

SUMMARY1.A factor necessary for the growth ofPilobolus kleinii, P. longipes, P. umbonatus, andP. roridushas been demonstrated.2.This factor has been named Coprogen.3.A stock medium consisting of dung decoction and oatmeal extract has been described for carrying species ofPilobolus.4.A block inoculum assay has been developed for the assay of Coprogen in agar in Petri dishes.5.The pH for maximum growth has been shown to be above 7.6.Growth ofPilobolus kleiniiin liquid media has been made possible resulting in a liquid assay that is both quantitative and qualitative.7.Certain aspects of spore germination have been studied in the genusPilobolus.

ISSN:0027-5514    

DOI:10.1080/00275514.1953.12024247

出版商:Taylor&Francis    

年代:1953

数据来源: Taylor

摘要:

SUMMARYStudies on the multiplication of four strains ofSaccharomyces cerevisiaeHansen and two strains ofHansenula anomala(Hansen) Sydow under various conditions revealed reductions in growth which parallel the lowered glucose utilization rates previously reported.Population curves for cultures containing various amounts of ethanol resemble those for glucose utilization by the same yeasts under similar conditions. A decrease in alcohol tolerance with elevated temperature is accompanied by reduced multiplication. Cells of the same yeast from aerated and nonaerated inocula, which exhibit differences in alcohol, also attain different population levels in the presence of ethanol.The primary effects of ethanol on yeast growth are reduction in the total number of cells formed and lowering of the exponential multiplication rate.Results of experiments involving estimation of cell numbers and glucose utilization in the same cultures indicate that the first effect of added ethanol is probably a reduction in multiplication, with glucose utilization by the culture as a whole declining only later.It is suggested that the decreased growth effected by ethanol results not only in fewer active cells, but also in the accumulation of high-energy phosphate bonds. These two effects, which result in a reduction in glucose utilization, could account for the occurrence of the phenomenon of alcohol tolerance.

ISSN:0027-5514    

DOI:10.1080/00275514.1953.12024248

出版商:Taylor&Francis    

年代:1953

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1953.12024249

出版商:Taylor&Francis    

年代:1953

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1953.12024250

出版商:Taylor&Francis    

年代:1953

数据来源: Taylor

摘要:

SUMMARYThe northern limit for heteroecious, self-sterile, long-cycled species ofPucciniaandUromycesis approximately tree line. Self-fertility and short-cycling enable many species to persist in the arctic on hosts of suitable habit. InChrysomyxa, overwintering of dikaryotic mycelium in evergreen leaves permits simultaneous development of uredinia and telia, and also makes the rust independent of the aecial host.Hyalopsora aspidiotusoverwinters both by amphispores and by mycelia in the aecial host, thereby producing aecia, uredinia and telia nearly simultaneously.Melampsora epiteaoverwinters as a systemic-perennial monokaryon inSaxifragaand as a dikaryon inSalixbuds, as well as by telia, thus being able to survive even when the sexual part of the life cycle cannot be completed.

ISSN:0027-5514    

DOI:10.1080/00275514.1953.12024251

出版商:Taylor&Francis    

年代:1953

数据来源: Taylor

摘要:

SUMMARYCultures ofMerulius lacrymanshave been distinguished from cultures of other wood-rotting fungi and from cultures of the common speciesMerulius americanus.The two species ofMeruliusmay be separated by differences in growth rate and mycelial mat characteristics when grown on 2 per cent malt agar in 90 mm. Petri dishes.M. lacrymansgrows best at a temperature of about 18°C and does not grow at 28°C.M. americanusgrows best at 26°C, grows well at a temperature of 30°C, and will even make a slight growth at 34°C. TheseMeruliusspecies have been encountered a few times in houses.Coniophora puteanaandPoria incrassataare two species causing destructive decay in houses in this country; they also have large brown spores. However,C. puteanais a much faster growing fungus than theMeruliusspecies andP. incrassatamay be differentiated from the other species by its mat and type of growth. Temperature requirements forC. puteana, P. incrassata, andM. americanusare quite similar.

ISSN:0027-5514    

DOI:10.1080/00275514.1953.12024252

出版商:Taylor&Francis    

年代:1953

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1953.12024253

出版商:Taylor&Francis    

年代:1953

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1953.12024254

出版商:Taylor&Francis    

年代:1953

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1953.12024255

出版商:Taylor&Francis    

年代:1953

数据来源: Taylor