Takao Raku
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Explore the profile of Takao Raku including associated specialties, affiliations and a list of published articles.
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7
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35
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Recent Articles
1.
Enzymatic synthesis of arbutin undecylenic acid ester and its inhibitory effect on melanin synthesis
Tokiwa Y, Kitagawa M, Raku T, Yanagitani S, Yoshino K
Bioorg Med Chem Lett
. 2007 Apr;
17(11):3105-8.
PMID: 17418566
Transesterification of arbutin and undecylenic acid vinyl ester was catalyzed by alkaline protease, Bioprase, in dimethylformamide to get arbutin derivative having undecylenic acid at 6-position of glucose moiety, 6-O-undecylenoyl p-hydroxyphenyl...
2.
Lim H, Raku T, Tokiwa Y
Biotechnol Lett
. 2005 Jun;
27(7):459-64.
PMID: 15928850
The substrate specificity of alpha-chymotrypsin and other serine proteases, trypsin, elastase, proteinase K and subtilisin, towards hydrolysis of various polyesters was examined using poly(L-lactide) (PLA), poly(beta-hydroxybutyrate) (PHB), poly(ethylene succinate) (PES),...
3.
Fan H, Kitagawa M, Raku T, Tokiwa Y
Biotechnol Lett
. 2004 Oct;
26(16):1261-4.
PMID: 15483383
Enzymatic transesterification of guanosine having low solubility against organic solvent was examined. For the transesterification between guanosine and divinyl adipate catalyzed by alkaline protease from Bacillus (Bioprase), DMSO was added...
4.
Lim H, Raku T, Tokiwa Y
Macromol Biosci
. 2004 Oct;
4(9):875-81.
PMID: 15468296
A highly sensitive analytical method for evaluation of poly(L-lactide) (PLA), poly(epsilon-caprolactone) (PCL), poly(beta-hydroxybutyrate) (PHB), and poly(butylene succinate) (PBS) degradability was developed using coated cellulose paper, prepared by penetration and adhesion...
5.
Raku T, Tokiwa Y
Biotechnol Lett
. 2004 Jun;
26(8):665-70.
PMID: 15200178
For the purpose of developing a new synthetic polymer containing an asymmetric molecule branch, three racemic alcohols, i.e. 1-phenylethanol, 1-(4-methylphenyl)ethanol and 1-(2-naphthyl)ethanol, were esterified enzymatically with divinyladipate using a lipase...
6.
Raku T, Tokiwa Y
Biotechnol Lett
. 2003 Aug;
25(12):969-74.
PMID: 12889833
The lipophilicity of kojic acid [5-hydroxy-2-(hydroxymethyl)-4H-pyran-4-one] was improved by esterifying kojic acid with either divinyl adipate, vinyl hexanoate, vinyl octanoate or vinyl decanoate using protease from Bacillus subtilis for 7...
7.
Raku T, Kitagawa M, Shimakawa H, Tokiwa Y
Biotechnol Lett
. 2003 Jul;
25(2):161-6.
PMID: 12882293
To enhance water solubility of 10-undecylenic acid, which has anti-fungus, anti-bacterial and anti-virus activity, D-glucose, trehalose and sucrose were regioselectively esterified with vinyl 10-undecylenic acid ester in dimethyl formamide by...