Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 25

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
The growth of 14 yeast strains in a lucerne waste juice was compared. The particular yeast cultures differed in efficiency and rate of utilization of sugars from the juice in the attained increments of biomass as well as in the protein content of the cells. The highest increment of biomass from 11.4 to 19.1 g d.m/l. was noted in C. utilis Z-2, C. guilliermondii K-29 and C. brumptii Z-1. The most dynamie growth was observed in C. utilis Z-2 and C. guilliermondii K-29. As a result of yeast cultivation the BOD₅ of the effluent dropped from 30-36.000 to 9-15.000 mg O₂/l.
Cultivations of 16 yeast strains of the species Candida, Torulopsis, Pichia, Hansenula and Schizosaccharomyces were carried out in a fermented and non-fermented juice from sugar beet leaves. Most strains utilized well sugars and lactic acid contained in the medium. Increments of biomass in the best cultures from 12 to 20 g of dry matter/dm³ depending on the initial sugar concentration were noted. The crop of microbial protein was substantially battered by a complement of the medium with ammonia N. The strain C. scottii A-311 proved to be the best adapted to growth in this medium. A high growth dynamics of this culture was observed, which was expressed in a shortening doubling time of biomass.
Lucerne waste juice has been estimated from the point of view of its usability for the production of yeast biomass. Two Candida strains, isolated from lucerne, grew well in this parent medium in the whole vegetation season, but the substantial variability of the chemical composition, particularly the concentration of sugars and nitrogen had an essential eff ect on both finał cell mass and the dynamics of yeast growth. The highest increments of biomass from 9.4 to 20.4 g dry matter/dm³ were obtained at the outset of the vegetation season. Later, together with the drop in sugar concentration the increment of biomass was decreasing. The growth rate of yeast also fell to 0.26 h⁻¹. Yeasts were cultivated in a fermenter and on a shaker under non-sterile conditions at pH 3.8 to 3.9.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.