Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Influence of pH, lactose and lactic acid on the growth of Streptococcus cremoris: a kinetic study (1988)
    Springer
    Applied microbiology and biotechnology 28 (1988), S. 340-344 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The effect of various culture conditions on growth kinetics of an homofermentative strain of the lactic acid bacterium Streptococcus cremoris were investigated in batch cultures, in order to facilitate the production of this organism as a starter culture for the dairy industry. An optimal pH range of 6.3–6.9 was found and a lactose concentration of 37 g·l-1 was shown to be sufficient to cover the energetic demand for biomass formation, using the recommended medium. The study of the effect of lactic acid concentration on growth kinetics revealed that the end-product was not the sole factor affecting growth. The strain was characterized for its tolerance towards lactic acid and a critical concentration of 70 g·l-1 demonstrated. With the product yield of 0.9 g·g-1 at non-lactose limiting conditions the lactic acid concentration of 33 g·l-1 could not explain the low growth rates obtained, implicating a nutritional limitation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00268192
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Production of volatile compounds in liquid cultures by six strains of coryneform bacteria (1992)
    Springer
    Applied microbiology and biotechnology 36 (1992), S. 790-794 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The aromatic profiles of four strains of Brevibacterium linens, one strain of Brevibacterium sp. and one strain of Microbacterium sp. were determined with some pure cultures of these microorganisms in standard trypcase soy liquid medium, which enabled four of these six strains to produce flavour compounds of ripened cheese. Thirty-two flavour compounds were identified by gas chromatography and mass spectrometry. The identified flavour compounds included the following: fatty acids, alcohols, methylketones, sulphur compounds, aromatic compounds and a pyrazine. Some important differences were found among the six strains studied. The four strains of B. linens had similar flavour profiles. Their typical flavour was probably due to dimethyltrisulphide. The two other strains did not appear to produce this compound. Three strains produced significant amounts of the floral aromas phenylethanol and phenylpropanone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00172196
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Enhanced inhibitory effect of lactic acid on growth kinetics of Streptococcus cremoris during nutritional medium limitations (1989)
    Springer
    Applied microbiology and biotechnology 30 (1989), S. 630-635 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary In batch cultures of Streptococcus cremoris growth parameters, especially the specific growth rate and its alteration during time-courses of fermentation, were found to be dependent on the culture conditions, in particular the inoculum size and medium composition. It was demonstrated that growth was subject to two main factors, inhibition by lactic acid and limitation by nutritional compounds, the first effect being strongly dependent on medium composition. The tolerance of the strain towards lactic acid was characterized, and critical values of the end-product were related to the concentration of yeast extract and bactotryptone in the medium. After taking into consideration the inhibitory effect of lactic acid, the level of nutritional limitation accounted for the change in specific growth rate during time courses of the culture.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00255371
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    High-concentration cultivation of Lactococcus cremoris in a cell-recycle reactor (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 37 (1991), S. 746-754 
    Details
    ISSN: 0006-3592
    Keywords: Lactococcus cremoris ; cell-recycle fermentor ; cross-flow filtration ; high cell concentration cultures ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: High-cell concentration cultivation of Lactococcus cremoris, a homofermentative lactic acid producer, in a cell-recycle fermentor is described. Cross-flow filtration allowing continuous removal of the inhibitory metabollte, the influence of dilution rate on growth was investigated in total or partial cell-recycle cultures. The dependence of growth characteristics on operating conditions was identified and quantified using lactose as the carbon source. Growth kinetics could be described by both lactate removal efficiency and nutrient availability. Based on physiological observations, biomass and lactic acid productivities were predicted in partial cell-recycle cultures.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260370809
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...