Crystalline Modifications of D-Mannitol.

Crystal structure of anhydrous d-D-mannitol

The crystal structure of anhydrous d-D-mannitol (C6H14O6) was solved from high-resolution synchrotron X-ray powder diffraction data collected on a mixture containing 20% and 80% w/w of band d-D-mannitol, respectively. The direct space simulated annealing program PSSP, and Rietveld analysis employing GSAS were used to determine and refine the structure. The polymorph has monoclinic symmetry, spa...

Improved detection sensitivity of D-mannitol crystalline phase content using differential spectral phase shift terahertz spectroscopy measurements.

We report quantitative measurement of the relative proportion of δ- and β-D-mannitol crystalline phases inserted into polyethylene powder pellets, obtained by time-domain terahertz spectroscopy. Nine absorption bands have been identified from 0.2 THz to 2.2 THz. The best quantification of the δ-phase proportion is made using the 1.01 THz absorption band. Coherent detection allows using the spec...

Crystalline D-serine dehydrase.

D-mannitol metabolism by Aspergillus candidus.

Pathways of mannitol biosynthesis and utilization in Aspergillus candidus NRRL 305 were studied in cell-free extracts of washed mycelia prepared by sonic and French pressure cell treatments. A nicotinamide adenine dinucleotide-linked mannitol-1-phosphate (M1P) dehydrogenase was found in French pressure cell extracts of d-glucose-grown cells, whereas a specific mannitol-1-phosphatase was present...

Production of D-mannitol by conidia of Aspergillus candidus.

Conidia of Aspergillus candidus converted glucose and other sugars to mannitol. Low pH (ca. 3.0) apparently favored the percentage yield but decreased the fermentation rate.