t-,/rrr',r47c

sdn. prcrcin digcstibilily, biologi€l vatue oer prorei! utiliario4 f..d efilci.nc1
Erio and prclein efliciency ratio.
Gitl.reral. (1958) rcplaed ftc fish malwnh Toruta yest .l 25, 50, 75 and
100 perccnt lqeh in rhe basal dier of lats. They concluded $at 25% subslitulion
did rot cffect the grcw1h but subsritDiion of50, Z5 md I00% decrea.d the groMh
rate by I 8, 29 aqd 4E peunt respsliv.ty .s conpsed to contrcl. Thc p€llaing of
Torula yeasl improved ib perfomance and 50% r.placmenr tevel was comparable
with that of control. But subsritution ar ?5 or 100% of rh. fish m$t rcsutr€d in !
reduced Srosth by I ? md 35% r€spectively.
Bo.k .t al. (1968) d.l@ined rh. nuritiv. vshe ofscp prep@d ftom thrc.
diff.renr year stmins yiL, C.tdida ttilx, Candi.t ttoDi.alb and Condida
Iipo,tica in a ftr fea ing nial. C.ttilit ai C.lropicatis werc rich in lysine $at is
nore tlan 6.5% oftotal prcbin and in .ll l:as the S-mino acids wft limiring thar
is less thon 2% of the prcl€in. Tl€y obseNed lhat biotogicat value of Ct,rotr.ca is
bclow 50 but the addirion of melhioninc inro tyo sept€s of C.tropicatis incrcas.d
biological value from 55 to fron 8910 93.
Breesani (1968) obsen€d the prorein digesribitiry, proreiD efliciency l.rio
and biologisl vafuc of the SCP prcp r.d ft@ Candida dittu s 88%, r .4 and 48yo
resp@liv€ly. Tho ndhionine suppl€mctrralion of the sct, at 0.5% level was
obswed to improve rhe valo.s ro 9070,2.1 ud EE %, respecrivety.
Calloway and Kumar (1969) hsesled the cells ot Hrdroeehonon8
4!r.oprd fron senimtinuous autrophic cdtu !. Th. ells conraincd |3% nitroS.:n
on dry wciShr basis. Th. biotogi@t vatue $6! found to be iTvo borh for cc ut.r
protein ard @ein whefeas diSestibility wd 93% and 99% ofcellutar pror€in and
cdein prolctn, repcctively. Tle amino acid @mposirion ofrhe badc.ia as in rhe
dse ofcas€in indicaled methionine a! dc fiBl limiting anino acid.