Results 151 to 160 of about 1,736 (179)

Synthesis and stereochemistry of some derivatives of d-psicose

Carbohydrate Research, 1979
Abstract A number of derivatives of the ketohexose d -psicose have been synthesized, comprising examples of acetals, esters, ethers, and glycosides. Among them are precursors of 1-,3-,5-, and 6-mono- O -methyl- d -psicose, including 3- O -methyl-β- d -psicopyranose 4,5-carbonate, the first crystalline representative of the reducing form of the ...
Philippe C.M. Herve Du Penhoat, Arthur S. Perlin   +1 more
openaire   +1 more source

Crystal data of branched-chain derivatives of D-psicose

Journal of Applied Crystallography, 1981
Crystal data are reported for six derivatives of 1,2-O-isopropylidene-3-C-(pyridin-2-yl)-β-D-psicopyranose, C14H19NO6, previously studied in solution by NMR spectroscopy. Molecules that differ only by the replacement of H by CH3 on one non-ring oxygen atom, converting an alcohol to an ether molecule, show no similarity in cell dimensions, and have ...
N. Sharafi, G. Donnay, P. C. M. Herve du Penhoat, A. S. Perlin   +3 more
openaire   +1 more source

Efficient conversion of allitol to d-psicose by Bacillus pallidus Y25

Journal of Bioscience and Bioengineering, 2007
An efficient method for conversion of allitol to D-psicose was achieved by a resting cell reaction of Bacillus pallidus Y25 for the first time. Notably, it was possible to produce D-allose and D-altrose from allitol directly via D-psicose by prolonging the reaction time. This method was applied for the preparation of D-psicose using the extract of Itea
Wayoon, Poonperm, Goro, Takata, Yasuyo, Ando, Verasak, Sahachaisaree, Pipob, Lumyong, Saisamorn, Lumyong, Ken, Izumori   +6 more
openaire   +2 more sources

Synthesis of some derivatives of 3-C-methyl-d-psicose, 3-C-methyl-d-fructose, and 6-deoxy-3-C-methyl-d-psicose

Carbohydrate Research, 1981
Abstract The synthesis of di- O -isopropylidene derivatives of 3- C -methyl- d -psicose ( 3 ) and 3- C -methyl- d -fructose by the reaction of 1,2:4,5-di- O -isopropylidene-β- d - erythro -hexo-2,3-diulo-2,6-pyranose ( 2 ) with methylmagnesium iodide and methyl-lithium is described. The reaction of 2 with diazomethane and reduction of the resulting
Isidoro Izquierdo Cubero, Maria D. Portal Olea   +1 more
openaire   +1 more source

d-Allose and d-psicose reinforce the action of metronidazole on trichomonad

Parasitology Research, 2011
The effects of D-allose and D-psicose on Tritrichomonas foetus were examined. They were cultured in F-bouillon medium including glucose, but had never increased when glucose was substituted to those sugars. When cultured in a medium including a dose of ED(50) metronidazole and those sugars, trichomonad density was significantly less than that in a ...
Masakazu, Harada, Emi, Kondo, Hiromi, Hayashi, Chigusa, Suezawa, Setsuo, Suguri, Meiji, Arai   +5 more
openaire   +2 more sources

d-Allose production from d-psicose using immobilized l-rhamnose isomerase

Journal of Fermentation and Bioengineering, 1998
Abstract d -Psicose was produced from d -fructose using an immobilized d -tagatose 3-epimerase ( d -TE), and used as a substrate for the production of d -allose by immobilized l -rhamnose isomerase ( l -RI). d -Allose was produced from d -ssicose by l -RI, which was constitutively produced by a mutant strain of Pseudomonas sp.
Shakhawat Hossain Bhuiyan, Yoshiyuki Itami, Yuko Rokui, Takeshi Katayama, Ken Izumori   +4 more
openaire   +1 more source

The synthesis of D-psicose derivatives using recent oxidative procedures

Journal of the Chemical Society C: Organic, 1967
The oxidation of authentic 1,2,:4,5-di-O-cyclohexylidene-D-fructopyranose and of 1,2:4,5-di-O-isopropylidene-D-fructopyranose with dimethyl sulphoxide–acetic anhydride yields 1,2:4,5-di-O-cyclohexylidene-D-erythro-hex-3-ulopyranose and 1,2:4,5-di-O-isopropylidene-D-erythro-hex-3-ulopyranose, respectively.
K. James, A. R. Tatchell, P. K. Ray
openaire   +1 more source

Antioxidant properties of custard pudding dessert containing rare hexose, d-psicose

Food Control, 2007
Abstract Custard pudding (CP) is a sweet dessert composed of nutritionally valuable egg, milk and sucrose. In the present study, d -psicose (Psi), a noncalorie rare hexose, was added into raw materials of custard pudding as a substitute for sucrose in order to develop a new functional dessert.
Yuanxia Sun, Shigeru Hayakawa, Masahiro Ogawa, Ken Izumori   +3 more
openaire   +1 more source

Production of d-talitol from d-psicose by Candida famata R28

Journal of Fermentation and Bioengineering, 1998
A halotolerant yeast strain R28 that can convert d-psicose to d-talitol was isolated from soy sauce mash and identified as Candida famata. The cells grown on l-sorbose were found to have the best conversion potential. C. famata R28 converted d-psicose to d-talitol at a faster rate in the presence of various carbohydrates such as erythritol, d-sorbitol,
Hiroyuki Sasahara, Masaki Mine, Ken Izumori   +2 more
openaire   +1 more source

Conversion of d-psicose to allitol by Enterobacter agglomerans strain 221e

Journal of Fermentation and Bioengineering, 1995
Abstract Enterobacter agglomerans strain 221e transformed d -psicose to allitol at a faster rate in the presence of d -glucose in the reaction mixture when the entrance of oxygen was restricted. Cells grown on glycerol were found to be suitable for the transformation reaction.
Syed Muniruzzaman, Hisahiro Tokunaga, Ken Izumori   +2 more
openaire   +1 more source