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J Cazin

Publications and source records attributed to J Cazin.

23 records · Page 2Linked to original sources
PubMed1969

Extracellular deoxyribonuclease production by yeasts.

A total of 20 genera of yeasts and yeastlike organisms were tested for their ability to produce an extracellular deoxyribonuclease. Results indicate that ability to produce the enzyme appears to be a specific characteristic of the three genera Rhodotorula, Cryptococcus, and Tremella. A single strain of Endomycopsis fibuligera was also shown to be positive for the enzyme. In comparing the ability of the organisms to excrete extracellular deoxyribonuclease with their ability to produce urease, a surprisingly close correlation was found. With the exception of Lipomyces starkeyi, all the organisms which were deoxyribonuclease-negative were also urease-negative. Of those organisms which were deoxyribonuclease-positive, only E. fibuligera was urease-negative. The ability of cryptococci to produce extracellular deoxyribonuclease is discussed in relation to the implication which this finding may have for the taxonomy and phylogeny of the genus.

Culture Media↗
PubMed1968

Assimilation of alkanes and alkenes by fungi.

A group of filamentous fungi were assayed for their ability to utilize a series of n-alkanes and 1-alkenes as the sole source of carbon. Although strains of Cunninghamella exhibited profuse growth on most of the hydrocarbons tested, the majority of fungi tested were able to produce definite growth on one or more of the compounds. The hydrocarbons with a 14-carbon chain length appeared to be more consistently utilized than any other. Strains of Aspergillus appeared to differ in their capacity to utilize individual members of the hydrocarbon series. Thin-layer chromatographic analyses of ether extracts from C. blakesleeana grown on n-tetradecane and 1-tetradecene were similar and revealed the presence of a monocarboxylic acid, a primary alcohol, and a secondary alcohol.

Alkanes↗
PubMed1965

Growth of Allescheria boydii in anitbiotic-containing media.

Cazin, John, Jr. (University of Iowa, Iowa City), and David W. Decker. Growth of Allescheria boydii in antibiotic-containing media. J. Bacteriol. 90:1308-1313. 1965.-Thirteen isolates of Allescheria boydii were surveyed for their ability to grow and sporulate on media containing cycloheximide and chloramphenicol. The fungus grew well in the presence of 4 to 8 mg/ml of cycloheximide, whereas ascocarps and coremia were always inhibited at a concentration of the drug lower than that required to inhibit growth and conidial production. In certain strains, ascocarp production was inhibited by concentrations of cycloheximide (0.4 mg/ml) normally used in selective media; however, two strains produced mature ascocarps at a concentration of 1 mg/ml of the antibiotic, and two strains produced immature ascocarps at a concentration of 4 mg/ml. Growth inhibition was not observed with concentrations of chloramphenicol as high as 1,000 mg per liter in any of eight strains tested.

Anti-Bacterial Agents↗