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.

A new method for measuring the crystallinity index of quartz by infrared spectroscopy

1991 ◽  
Vol 55 (381) ◽  
pp. 579-582 ◽  
Author(s):  
S. Shoval ◽  
Y. Ginott ◽  
Y. Nathan
Keyword(s):  
Absorption Spectrum ◽  
Infrared Spectroscopy ◽  
Infrared Absorption ◽  
Infrared Absorption Spectrum ◽  
Crystallinity Index ◽  
New Method ◽  
X Ray ◽  
First Derivative

AbstractA new method for measuring the crystallinity index of quartz is presented. It is based on the measurement of the intensity of the first derivative of the infrared absorption spectrum at the shoulder at c. 1145 cm−1. The results correlate well with X-ray and D.T.A. crystallinity measurements.

Conversion of Monetite, CaHPO4, To Apatites: Effect of Carbonate on the Crystallinity and the Morphology of the Apatite Crystallites

1970 ◽  
Vol 14 ◽  
pp. 57-66 ◽  
Author(s):  
Racquel Z. LeGeros ◽  
John P. LeGeros ◽  
Otto R. Trautz ◽  
W. Paul Shirra
Keyword(s):  
Crystallite Size ◽  
Diffraction Pattern ◽  
Absorption Spectra ◽  
Infrared Absorption ◽  
Carbonate Content ◽  
Structural Effects ◽  
X Ray Diffraction ◽  
X Ray ◽  
Carbonate Solutions ◽  
Infrared Absorption Spectra

AbstractThe incorporation of carbonate in the apatite causes a decrease in crystallite size as demonstrated in precipitated apatites prepared at 37°C. Carbonate disturbs the crystallization of the growing apatite crystallites to such an extent that materials with more than 15 wt% CO3 gives an ‘amorphous’ x-ray diffraction pattern. The incorporation of carbonate in precipitates prepared at 100°C. causes a shortening of the a-axis and a lengthening of the c-axis which is proportional to the carbonate content, supporting the concept that in these apatites, CO3 substitutes for PO4 (11). X-ray diffraction linebroadening studies of CO3-apatites precipitated at 100°C and electron micrographs show that the size and shape of the crystallites change from long needles to smaller rods to tiny spheroids, depending upon the amount of CO3. Carbonate causes the bonding in the apatite to become weaker and more isotropic, which results in the small spheroidal crystals.This paper reports the effect of carbonate on lattice parameters and morphology of carbonate-apatites which have been prepared by the conversion of rnonetite, CaHPO4 in hot carbonate solutions. The structural effects of CO3 on the apatite is further reflected by the modification of the vibrations of the PO4 groups in the infrared absorption spectra. The morphology of ‘amorphous’ CO3- containing apatitic precipitates and that of CO3∼apatite with high CO3 content (prepared at 100°C) is similar, i.e., spheroidal in shape, but greatly differing in crystallite size.

Experimental Studies on Micro-Characteristics of Nanocrystalline MgO

2013 ◽  
Vol 652-654 ◽  
pp. 178-181
Author(s):  
Guo Jian Zhao
Keyword(s):  
Infrared Absorption ◽  
Infrared Absorption Spectrum ◽  
Experimental Studies ◽  
Main Character ◽  
Line Broadening ◽  
X Ray Diffraction ◽  
X Ray ◽  
Average Grain Size ◽  
Microstructure Parameters ◽  
Nanocrystalline Mgo

By analysis of X-ray diffraction and infrared absorption spectrum, we obtained the microstructure parameters of the MgO powders sample and found that the main character infrared absorption peak was at 416 cm-1. And we calculated out the average grain-size of sample according to the breadth of diffraction peak and the line broadening formula.

Thermal, X-ray and infrared absorption spectrum analyses of a new uranyl sulphate mineral

1985 ◽  
Vol 86 ◽  
pp. 383-386 ◽  
Author(s):  
Z. Urbanec ◽  
Z. Mrázek ◽  
J. Čejka
Keyword(s):  
Absorption Spectrum ◽  
Infrared Absorption ◽  
Infrared Absorption Spectrum ◽  
X Ray

The Crystal Structure of Vanillosmopsis-Derived (-) α-Bisabolol p-Phenylazophenylurethane

1989 ◽  
Vol 42 (11) ◽  
pp. 2041 ◽  
Author(s):  
RM Carman ◽  
WT Robinson ◽  
MD Sutherland
Keyword(s):  
Crystal Structure ◽  
Melting Point ◽  
Diffraction Pattern ◽  
Optical Rotation ◽  
Unit Cell ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cell Dimensions ◽  
Unit Cell Dimensions

The p-phenylazophenylurethane of Vanillosmopsis-derived (-)-α-bisabolol has unit cell dimensions and an X-ray diffraction pattern identical with those reported for the p-phenylazophenylurethane of Matricaria-derived (-)-α-bisabolol, despite having a higher melting point and different optical rotation.

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