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  • 2,8-dimethyl-1,7-dioxaspiro[5.5]undecane  (1)
  • Antibiotics from Aspergilli  (1)
  • 2,6-di-O-methyl-3-O-pentyl-β- and y-cyclodextrins
  • Springer  (2)
Collection
Keywords
Publisher
Years
  • 1
    Electronic Resource
    Electronic Resource
    Metabolic products of microorganisms (1978)
    Springer
    Archives of microbiology 116 (1978), S. 253-257 
    Details
    ISSN: 1432-072X
    Keywords: Antibiotics from Aspergilli ; Cladosporin ; Dimethyl cladosporin ; Asperentin ; Isocoumarins
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Cladosporin was isolated from the cultures of three species of the genus Eurotium. Cladosporin inhibited the growth of several fungi and at very low concentrations the growth of Bacillus brevis and Clostridium pasteurianum. Bacillus subtilis and most other Gram-positive bacteria were not sensitive. Gram-negative bacteria and yeasts were not affected by concentrations up to 100 μg/ml. Dimethyl cladosporin showed only weak activity against Bacillus brevis with the minimal inhibitory concentrations being a 100 times higher than of cladosporin. The incorporation of leucine and uracil into acid insoluble material in Bacillus brevis cells was completely inhibited by concentration of 0.5 μg/ml cladosporin. The incorporation of thymidine was not affected at this concentration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00417848
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  • 2
    Electronic Resource
    Electronic Resource
    Andrena wilkella male bees discriminate between enantiomers of cephalic secretion components (1990)
    Springer
    Journal of chemical ecology 16 (1990), S. 429-441 
    Details
    ISSN: 1573-1561
    Keywords: Enantiomer discrimination ; male patrolling ; odor marking ; Hymenoptera ; Apoidea ; Andrena wilkella ; bee ; EAG ; spiroacetal ; absolute configuration ; 2,8-dimethyl-1,7-dioxaspiro[5.5]undecane
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Diastereomers of the spiroacetal, 2,8-dimethyl-1,7-dioxaspiro [5.5]undecane, represent main components of the cephalic secretion from males of the solitary bee,Andrena wilkella. The major compound proved to be of high enantiomeric purity, showing (2S,6R,8S) configuration. Only the naturally occurring enantiomer attracted patrolling males in the field; its antipode was behaviorally inactive and in a racemic mixture did not inhibit response. The (E,Z) diastereomers were also found to be almost inactive. EAG studies gave the same result as the behavioral tests. The biological function of the spiroacetal is discussed in view of the evolution of the mating behavior inA. wilkella.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01021775
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