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Screening and optimizing culture conditions of Bacillus

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ChineseJournalofBioprocessEngineering
Vol.8No.1
Jan.2010
doi:10.3969/j.issn.1672-3678.2010.01.008
OPQI
:2009-05-03
KCR!

ÿXê!ŠwÝäæçàáâã
(J08LE55);
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(20307000108)
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:1672-3678(2010)01-0040-05
ScreeningandoptimizingcultureconditionsofBacilusstrainfor
producingγpolyglutamicacid
FENGZhibin,CHENGShiwei,MIAOJing,ZHANGYuxiang,
WANGQinqin,YANGZaidong,ZHUYingpu
(ColegeofLifeScience,LudongUniversity,Yantai264025,China)
Abstract:γPolyglutamicacidproducingstrainyt102wasisolatedfromsoilsandtaxonomicalyidentified
asBacilussubtilis.Ahighproductivestrainofγpolyglutamicacidwasobtainedfromyt102withmuta
genesisbyUVandNTG,anditwasgeneticalystablein10generations.Fermentationmediumcomposi
tionforthemutantstrainwasoptimizedbyasinglefactorandpreliminaryorthogonalexperiments.The
averageyieldofγpolyglutamicacidreached285g/Lontheoptimizedmedium.
Keywords:Bacilussubtilis;optimization;γpolyglutamicacid;screening
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OD600
ρ(γ PGA)/
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Fp
1112 193
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P
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(g·L-1)
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ρ
(γ PGA)
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2 1(10) 2(50) 2(7) 2(30) 232
3 1(10) 3(70) 3(9) 3(50) 217
4 2(30) 1(30) 2(7) 3(50) 272
5 2(30) 2(50) 3(9) 1(10) 237
6 2(30) 3(70) 1(5) 2(30) 250
7 3(50) 1(30) 3(9) 2(30) 224
8 3(50) 2(50) 1(5) 3(50) 242
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A(
-.†G
) B(
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K3 22233 22267 22600 24367

R 3567 1433 0900 3000
Èùª
22376 3282 1242 14389 4129
Û̘
2 2 2 2 8

w
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-3Ts

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M“6i

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