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l9<br />
Burgets (1994) dcveloped the mutsrt st6in of y@t Sa..hdrotht\es<br />
.endh". {hich wcrc dcficienl in prol4e enzym.. 'Ilt stains e€e used for<br />
preparation of yeasr €xtrdcts Siving maxnnM yield of nuclear prol€ins. They also<br />
developed anothe. mcthod for avoiding prclolysis during erlraction process llal h<br />
blendils c.lh with 8lN b.tds.<br />
Kalld-Mhiri dr aI. (1994) in a @culture fem€nlation prc.es studied lhe<br />
bioniass production on nedia eilhd ortlinin8 whey pemot dd glucose (WC)<br />
or whey permeatc. elucose and maltose (WGM). The orgmisms used for<br />
f€nneniation w* Sd..rarou)r.r ..nnide CBS 8066 .nd &utaetuht!.es Iragilis.<br />
Fo. eoch medium thc efist of y.st exlracr concotralios (0.1 and 0.5 e/L) was<br />
in!€stigated, Tley rcported lh.l the y€asi exlracr @ncentntion Ddledly elfect d<br />
the equilibriun of the co-cullue and c.ll yield, shich wd also influ€nced by the<br />
dil(ion.ak. Theyield varied from 0.261o 0.48 g/9.<br />
Niwa and Hirct(o (1994) prcparcd a cullurc medi! @ntaining yeasl extract.<br />
glucos. ed srdch havin8 pH 3-5. Th.y rcpon.d that lhe cultua d€dium wos<br />
useful for sel€ctive growth ofacidoplilic thermophilic bacteria toud in acidic fiuit<br />
juice at 40-60"C t mp@ture.<br />
Tabata €r d/. (1995) obse.v€d lb€ feding valu€ of th. yerst €itrEct- T1€<br />
e\trlct cotrlsitred 5 'neGlcolide, frce amino acid ad mannon and was lscful for<br />
enhancement of feeding efrrciency dd imono stimulalion. Tte extdc! 6<br />
prepar€d by autolysk ol ycasl celk grown in sulfile pulp spenl liquor healing 1o<br />
inacrivate lhe enzymic activilics and incubation of c.ll lysale wift 5 -<br />
ph$phodiestcBe ard 5 -adenylic acid deaminas.. The yeatt seleclcd were rortla<br />
yeast and sacc haronryes.<br />
El-S.baeny and Halsan (1996) in a study ob6€rv.d lhc influencc of mediom<br />
composition on producdon of laclic acid, lactic acid dehydrogenate (LDll) and<br />
single cell prolein. The] reportcd thal dried \fhey endched mediu'n (870 w/v)
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