Acetic acid under pressure: The formation below 0 °C, x‐ray powder diffraction pattern, and far‐infrared absorption spectrum of phase II

1981 ◽  
Vol 75 (4) ◽  
pp. 1639-1643 ◽  
Author(s):  
John E. Bertie ◽  
Richard W. Wilton
Keyword(s):  
Absorption Spectrum ◽  
Acetic Acid ◽  
Diffraction Pattern ◽  
Phase Ii ◽  
Powder Diffraction ◽  
Infrared Absorption ◽  
Infrared Absorption Spectrum ◽  
Far Infrared ◽  
X Ray

THE IDENTIFICATION OF A NINHYDRIN-POSITIVE URINARY COMPONENT RECENTLY REPORTED IN HYPOPHOSPHATASIA

1957 ◽  
Vol 35 (12) ◽  
pp. 1123-1133 ◽  
Author(s):  
Donald Fraser ◽  
C. C. Lucas
Keyword(s):  
Absorption Spectrum ◽  
Melting Point ◽  
Diffraction Pattern ◽  
Infrared Absorption ◽  
Mixed Melting Point ◽  
Infrared Absorption Spectrum ◽  
X Ray Diffraction ◽  
X Ray ◽  
Unequivocal Identification ◽  
Affected Infant

In 1955, the occurrence of a hitherto unreported ninhydrin-positive substance in the urine and plasma of infants suffering from hypophosphatasia was described. Evidence published at that time and subsequently suggested that the material might be phosphorylethanolamine, but the isolation and unequivocal identification of the substance has not been reported.The present paper describes the isolation of a small amount of the previously unidentified compound from the urine of the heterozygous father of a seriously affected infant. The melting point, mixed melting point, X-ray diffraction pattern, infrared absorption spectrum, and N: P ratio establish the identity of the substance to be phosphorylethanolamine. Proof that this compound occurs in hypophosphatasia provides a logical basis for further study of the metabolic importance of this substance.

THE IDENTIFICATION OF A NINHYDRIN-POSITIVE URINARY COMPONENT RECENTLY REPORTED IN HYPOPHOSPHATASIA

1957 ◽  
Vol 35 (1) ◽  
pp. 1123-1133
Author(s):  
Donald Fraser ◽  
C. C. Lucas
Keyword(s):  
Absorption Spectrum ◽  
Melting Point ◽  
Diffraction Pattern ◽  
Infrared Absorption ◽  
Mixed Melting Point ◽  
Infrared Absorption Spectrum ◽  
X Ray Diffraction ◽  
X Ray ◽  
Unequivocal Identification ◽  
Affected Infant

In 1955, the occurrence of a hitherto unreported ninhydrin-positive substance in the urine and plasma of infants suffering from hypophosphatasia was described. Evidence published at that time and subsequently suggested that the material might be phosphorylethanolamine, but the isolation and unequivocal identification of the substance has not been reported.The present paper describes the isolation of a small amount of the previously unidentified compound from the urine of the heterozygous father of a seriously affected infant. The melting point, mixed melting point, X-ray diffraction pattern, infrared absorption spectrum, and N: P ratio establish the identity of the substance to be phosphorylethanolamine. Proof that this compound occurs in hypophosphatasia provides a logical basis for further study of the metabolic importance of this substance.

New data for lansfordite

1982 ◽  
Vol 46 (341) ◽  
pp. 453-457 ◽  
Author(s):  
R. J. Hill ◽  
J. H. Canterford ◽  
F. J. Moyle
Keyword(s):  
Absorption Spectrum ◽  
Low Temperature ◽  
Diffraction Pattern ◽  
Powder Diffraction ◽  
Room Temperature ◽  
X Ray ◽  
Infra Red ◽  
Bicarbonate Solutions

AbstractEuhedral crystals of the low-temperature mineral lansfordite, MgCO3 · 5H2O, have been prepared from saturated magnesium bicarbonate solutions at temperatures below 10°C. The crystals are monoclinic P21/a with a = 12.4758(7), b = 7.6258(4), c = 7.3463(6)Å, β = 101.762(6)°, V = 684.24Å3, Dcalc. = 1.693 g cm−3, Dobs. = 1.70(1) g m−3. At room temperature, the crystals slowly effloresce to produce pseudomorphs of nesquehonite, MgCO3 · 3H2O. Dehydration is complete at 300°C, with decarbonation taking place in the interval to 560°C. A new X-ray powder diffraction pattern is presented, and details of the infra-red absorption spectrum are discussed.

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