t-,/rrr',r47c

l5
nunber of yeast c.ll in 10-14 h dd found nccessary to ae frcsh su8e @e juic.
qhoce rH $s 4.5-5.2. ar incubdrion remptrsture or 12 t. Tle oprimum
concentntion of rcducing sugar at initial nage wc 70 8/L.
Elsabacny and Hlus (1996) femmted d.i.d vhey *ith ltutobtuiUa
delbub uec*ii sub sp.cies dg@r'tu 369 and cpo.(ed the hi8h6t producrion of
lactic acid l.7l 8,{-{r by using medium enriched wi$ whey (8% q/v} at pH 5.5.
Spccific activily oflactic acid dehyd.oSenrse was 1.03 U/mg prolein and single cell
prclein produced was 32.8%.In balch culture, the addirioD of20 tL elucose plus
0.759 nilrcSen/L a (NHaLSO. reruX€d in highst prcducliviry. By contrar when
xylose ed cellubios. rw 6.d d a eure of fm.ntlbl. clrbohydrar€s all
vad.bl6 serc reD.escd.
Han.t 41. (1997) isolared a'nicrcorg.nism from th€ provincial soil of Soulh
Korea. Tlt orgarism was idotilt d ts Candida sp. Dt t6. 't h€ oigrnism had ability
lo grcw in minimal poultry fa€B extEct. Supplddtation ofglucose to poulry
fa€c€s exhcl medium helped in compl.t upirte of soluble protein by lle
micrcorgatrism. Uric acid in lhe poultry famq cxctEct mcdiun could b.
con,plerely dcsodcd du.iDg ,nicrobial Srowth, but this deSadation wa faler in
taecs exkact thar in lhe gllcde oomplement medium, They obtlined maximun
cellsro*lh (l.8xl0'CUF/ml) at 36h of incubation. Addilion of4% neopetlore ro
th€ oinimal poltllry faecs edEct medium promoted Inaxilnal growth ofcells.
Lo sr o/. ( I 997) studied the cffecl of th. gl$coser'yeast cxtEcr 6tio (c/YE) in
$e medium on c€ll srowth and xmthan production in various op€.aling models
includios barch, two stages batch atrd fed barch fermentarions. They {o!nd thar
incred€d C/YE in the m€dium r.sultld in incrcdcd x.ntlan Drduction bur
d@l%ed c.ll yicld Md speific growth ra1c, lt ws @nclud.d that two slag6 balch
fmatation wirh C/YE shin frcm (2.5% 8lu@ser'o.3% y.!st .)dtnct ro (5.9%
glucose/0.3% y6si €itdc9 at th. €nd of.xponential gowth ph&c€ ws prcf.nblc