1,076 research outputs found
I Lieviti in enologia
No full textL'articolo, dopo un breve excursus storico, presenta l'utilizzo dei lieviti per la produzione dei vini, descrivendo i processi di fermentazione
Studio biogeografico della distribuzione di lieviti autoctoni nei processi di trasformazione delle olive da mensa dell'area libanese
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L'Invecchiamento biologico del Cannonau di Oliena
No full textAccelerated ageing trials were carried out on « Cannonau di Oliena» under production conditions.
Yeast «Flor» strains of the speciesSaccharomyces prostoserdoviiwere used as ageing agents.
Results showed that wines produced using these yeasts were superior to those produced normally
specially whenSacch. Prostoserdoviiwas added to the musts as «pied de cuve», thus reducing
maturing times considerably
Temperature profile of Candida cacaoi SS-2566
No full textCandida cacaoi SS-2566 was found to have a dissociative temperature profile and thermotolerant growth yield behaviour. With temperature-independent growth rates up to 42°C, its utilization at relatively high temperature for the production of cells (SCP, SCL) and/or metabolites may well be of interest, particularly in view of its hydrocarbon utilization
Su alcuni fattori di sviluppo del "flor" diSaccharomyces bailiiLindner
No full textFrom several tests carried out to obtain the time of formation and type
of flor on Vernaccia and the capacity to form film on synthetic medium with
a tea base, even with the presence of growing concentration of SO2and
of alcohol, some interesting differences in the behaviour of the strains ofSacch. Bailiiand the better known flor yeastsSacch. BayanusandSacch.
Prostoserdovii, are observed.
These results, moreover, with others a1ready obtained in previous experiments,
show the validity of the use of the speciesSacch. Bailiiin the
processes of the ageing of the “Vernaccia di Oristano”
Prove di tossicità da S C P nell'ovino: nota 7.: rilievi sul comportamento della microflora ruminale
No full textDuring chronic and acute toxicity trials on ovines, fed with an alkanegrown
SCP, observations were also made on the behaviour of the ruminaI
microflora.
The different diet supplied to both experimental and control groups of
animals, did not seem to have affected the total count and the total numbers
of Starch digesters, Cellulose digesters and Proteolytic bacteria. During the chronic toxicity test, 194 strains of yeast were identified
belonging to the following species:Candida boidinii, Candida slooffii, Candida tropicalis, Cryptococcus albidusvar.albidus, Cryptococcus albidusvar.diffluens, Cryptococcus dimennae,
Cryptococcus kuetzingii, Rhodotorula glutinisvar.dairenensis, Rhodotorula glutinisvar.glutinis, Rhodotorula graminis, Rhodotorula pallida, Rhodotorula
rubra, Torulopsis versatilis, Trichosporon cutaneum, Debaryomyces hansenii,
Debaryomyces phaffi, Debaryomyces tamarii, Saccharomyces vafer.
The yeast species that were isolated were not so different from those
discovered by other authors in similar researches, carried cut, however, in
animals fed differently. A marked diffusion of the genusDebaryomyceswas
to be observed, together with a notable lipolytic and caseinolytic activity in
most of the strains isolated.
At first the introduction of SCP in the diet at concentrations of 15%
and 40% seemed to favour the multiplication of the yeasts in the rumen
fluid, but their numbers diminished towards the end of both test in all
groups under observation.
The type of protein given, does not seem to have affected even the
species of yeasts that are usually lodged in the animals rumen.
Screening of the isolated strains is now in course for the SCP production
on glucose, lactose, xylose, starch, fruit and citrus pulps, and other conventional substrata
Stato dell'arte, prospettive e applicazioni di FT-IR e RAMAN nell'identificazione rapida dei microrganismi ambientali e patogeni
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