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Showing 1-20 of 20 results for "R8750" within Papers
Antoine Dupé et al.
ChemSusChem, 5(11), 2249-2254 (2012-09-27)
The modification of methyl ricinoleate by etherification of the hydroxyl group was accomplished by using a nonclassical ruthenium-catalyzed allylation reaction and also by esterification. Methyl ricinoleate derivatives were engaged in ring-closing metathesis (RCM) reactions leading to biosourced 3,6-dihydropyran and α,β-unsaturated
Yanqiong Guo et al.
Microbiological research, 167(4), 246-252 (2011-11-26)
The yeast Yarrowia lipolytica growing on methyl ricinoleate can produce γ-decalactone, the worthy aroma compound, which can exhibit fruity and creamy sensorial notes, and recognized internationally as a safe food additive. Unfortunately, the yield is poor because of lactone degradation
Mario Aguedo et al.
Journal of agricultural and food chemistry, 51(10), 3007-3011 (2003-05-02)
The adhesion of methyl ricinoleate droplets to cells of the yeast Yarrowia lipolytica was investigated. A new cytometric method, relying on the double staining of fatty globules with Nile Red and of cells with Calcofluor, enabled us to quantify methyl
Thao T T Ho et al.
ChemSusChem, 2(8), 749-754 (2009-07-02)
A design-of-experiments approach for the investigation of the cross-metathesis of methyl ricinoleate with methyl acrylate is described. Two second-generation metathesis initiators were studied using different reaction conditions, revealing optimal reaction conditions for each catalyst. Interestingly, the two catalysts showed completely
G Feron et al.
FEMS microbiology letters, 149(1), 17-24 (1997-04-01)
This paper provides new information about the metabolism of various fatty acids and gamma-decalactone production by yeast. An analysis of the fatty acid composition of the yeast Sporidiobolus salmonicolor during batch production of lactone with ricinoleic acid methyl ester as
Y Waché et al.
Applied and environmental microbiology, 66(3), 1233-1236 (2000-03-04)
We reported previously on the function of acyl coenzyme A (acyl-CoA) oxidase isozymes in the yeast Yarrowia lipolytica by investigating strains disrupted in one or several acyl-CoA oxidase-encoding genes (POX1 through POX5) (H. Wang et al., J. Bacteriol. 181:5140-5148, 1999).
M S Lie Ken Jie et al.
Lipids, 29(12), 889-892 (1994-12-01)
A novel 1-pyrroline fatty acid ester isomer (viz. 8-5-hexyl-1-pyrrolin-2-yl) octanoate) has been synthesized from methyl ricinoleate by two routes with an overall yield of 42 and 30%, respectively. Most of the reactions are carried out under concomitant ultrasonic irradiation (20
Gilles Feron et al.
FEMS microbiology letters, 250(1), 63-69 (2005-07-27)
Cell structure modifications and beta-oxidation induction were monitored in two strains of Sporidiobolus, Sp. Ruinenii and Sp. pararoseus after cultivation on ricinoleic acid methyl ester. Ultrastructural observations of the yeast before and after cultivation on fatty acid esters did not
Mario Aguedo et al.
Biotechnology letters, 27(6), 417-422 (2005-04-19)
The surface of the lipid-degrading yeast, Yarrowia lipolytica, was characterized by contact angle and zeta potential (zeta) measurements. The cells were mainly hydrophilic with a negative charge that was only affected from pH 2 to 4. To study the effects
A Endrizzi et al.
Journal of basic microbiology, 35(5), 285-292 (1995-01-01)
The capacity of several strains of yeasts to do the bioconversion of methyl ricinoleate into gamma-decalactone, was studied in a medium containing this methylic ester of fatty acid as sole carbon source. Amongst the strains which are able to do
David S Wunschel et al.
The Analyst, 137(9), 2077-2085 (2012-03-15)
The investigation of crimes involving chemical or biological agents is infrequent, but presents unique analytical challenges. The protein toxin ricin is encountered more frequently than other agents and is found in the seeds of Ricinus communis, commonly known as the
J T Lin et al.
Lipids, 35(5), 481-486 (2000-07-25)
We have examined the role of 2-oleoyl-PE (phosphatidylethanolamine) in the biosynthesis of triacylglycerols (TAG) by castor microsomes. In castor microsomal incubation, the label from 14C-oleate of 1-palmitoyl-2-[1-(14)C]oleoyl-sn-glycero-3-phosphoethanolamine is incorporated into TAG containing ricinoleate. The enzyme characteristics, such as optimal pH
Y Waché et al.
Applied and environmental microbiology, 67(12), 5700-5704 (2001-11-28)
Some microorganisms can transform methyl ricinoleate into gamma-decalactone, a valuable aroma compound, but yields of the bioconversion are low due to (i) incomplete conversion of ricinoleate (C(18)) to the C(10) precursor of gamma-decalactone, (ii) accumulation of other lactones (3-hydroxy-gamma-decalactone and
Y Waché et al.
Letters in applied microbiology, 30(3), 183-187 (2000-04-04)
Size of methyl ricinoleate droplets during biotransformation into gamma-decalactone by Yarrowia lipolytica was measured in both homogenized and non-homogenized media. In non-homogenized but shaken medium, droplets had an average volume surface diameter d32 of 2.5 microm whereas it was 0.7
M Aguedo et al.
Biotechnology letters, 27(20), 1617-1621 (2005-10-26)
Yarrowia lipolytica converts methyl ricinoleate to gamma-decalactone, a high-value fruity aroma compound. The highest amount of 3-hydroxy-gamma-decalactone produced by the yeast (263 mg l(-1)) occurred by increasing the k(L)a up to 120 h(-1) at atmospheric pressure; above it, its concentration
Nelma Gomes et al.
Biotechnology letters, 33(8), 1601-1606 (2011-03-25)
Oil-in-water emulsions composed of methyl ricinoleate (MR) or castor oil (CO) as the organic phase, stabilized by Tween 80, are in the basis of the biotechnological production of γ-decalactone. Yarrowia lipolytica was used due to its ability to grow on
Y Waché et al.
Applied microbiology and biotechnology, 61(5-6), 393-404 (2003-05-24)
The gamma- and delta-lactones of less than 12 carbons constitute a group of compounds of great interest to the flavour industry. It is possible to produce some of these lactones through biotechnology. For instance, gamma-decalactone can be obtained by biotransformation
M S Jie et al.
Lipids, 30(2), 115-120 (1995-02-01)
Using a combination of selective irradiation 1H nuclear magnetic resonance experiments and two-dimensional 1H-13C correlation spectroscopy spectral analysis of homoallylic and bis homoallylic substituted (azido, acetoxy, chloro and oxo) fatty ester derivatives, the carbon shifts of the ethylenic carbon atoms
Nelma Gomes et al.
Biotechnology letters, 34(4), 649-654 (2011-12-14)
Constant medium feeding rate and intermittent fed-batch fermentation strategies were investigated aiming to increase the yields of γ-decalactone production by Yarrowia lipolytica, using methyl ricinoleate as substrate and ricinoleic acid source. The accumulation of another compound, 3-hydroxy-γ-decalactone, was also analyzed
M S Jie et al.
Lipids, 27(1), 59-64 (1992-01-01)
Methyl oleate (18:1) and linoleate (18:2) were readily transformed to the corresponding gem-dichlorocyclopropane derivatives in high yield, using triethylbenzylammonium chloride as the phase-transfer catalyst in the presence of aqueous NaOH and CHCl3. Reaction of dichlorocarbene with methyl 12-hydroxystearate furnished methyl
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