Urinary vanillyl-mandelic acid (VMA) excretion by chronically anaemic children.
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چکیده
منابع مشابه
Urinary vanillyl-mandelic acid (VMA) excretion by chronically anaemic children.
Hypoxia has been regarded as one of the many factors stimulating augmented catecholamine biosynthesis (Vogt, 1960). Plasma levels of epinephrine and norepinephrine were found to be increased in newborns with the respiratory distress syndrome or placental insufficiency (Cheek, Malinek, and Fraillon, 1963). Infants with severe heart failure eliminate in the urine twice as much metanephrine, norme...
متن کاملThe urinary excretion of mandelic acid administered intravenously to cats.
MANDELIc acid, when administered to animals, may be recovered almost quantitatively from the urine. Moreover, when mandelic acid appears in the body as the result of metabolic processes, it is supposed to be excreted without further change [Knoop, 1905; Dakin, 1922; Quick, 1928]. Neubauer [1909], Neubauer & Fischer [1910], Neubauer & Gross [1910] and Neubauer & Warburg [1910] claimed that after...
متن کاملEnzymatic Method for Determination of Vanillyl Mandelic Acid.
An enzymatic method is described for the measurement of vanillyl mandelic acid (VMA). The method utilizes an L-mandelic acid dehydrogenase preparation from Pseudomonas fluorescens A-312 to catalyze the transformation of VMA to vanillin. The method is specific for VMA becauseonly the final product, vanillin, will absorb maximally at 350 m/L. The results compare favorably with the method of Pisan...
متن کاملThe Excretion of 4-hydroxy-3-methoxy-mandelic Acid by Children.
Much interest has been shown recently in the urinary excretion of 4-hydroxy-3-methoxy-mandelic acid (HMMA, but also known as VMA). It is accepted that its estimation may assist in the diagnosis of neuroblastoma and phaeochromocytoma, the high excretion usually found with these tumours being well above that possibly due to dietary constitutents, the stress of hospital admission, or recent operat...
متن کاملA Simple Low-voltage Paper Electrophoretic Method for the Determination of Urinary Vanillylmandelic Acid (vma).
A simple and accurate method for the determination of urinary 3-methoxy-4-hydroxy-mandelic acid, vanillyl-mandelic acid (VMA), is described. The separation of VMA from all other phenolic acids in approximately 0.05 ml. untreated urine is achieved by using low-voltage paper electrophoresis with different buffer concentrations for the cathode and the anode. The concentration of the electrophoreti...
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ژورنال
عنوان ژورنال: Archives of Disease in Childhood
سال: 1968
ISSN: 0003-9888,1468-2044
DOI: 10.1136/adc.43.229.372