منابع مشابه
Fluorometric Determination of Vitamin Constituents in Human Plasma
Methods: Alpha tocopherol, gamma tocopherol, and retinol are assayed using fluorescence detection. Excitation/emission wavelengths are 295 nm/330 nm and 325 nm/470 nm for the analysis of both tocopherols and retinol, respectively. Retinol acetate is employed as the internal standard. The reversed phase method incorporates gradient elution with a mobile phase consisting of methanol and acetonitr...
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A. FLUOROMETRIC METHOD for the determination of histidine was developed in response to the need for an accurate and precise manual method for the confirmation of histidinemia (1). it is based on the fluorometric method of Shore et a!. (2), which involves the condensation of histaniine with o-phthalaidehyde (OPT) in a strongly alkaline solution to form a rather labile fluorescent compound which ...
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With 4-chloro-7-nitrobenzo-2, 1,3-oxadiazole (I), fluorescent derivatives of propoxyphene can be prepared, thus enabling quantitation of the drug in biological samples. This technique offers an acceptable alternative to gas chromatographic (1-5) or ultraviolet spectrophotometric (6, 7) procedures. Favorable aspects of the fluorometric technique are high sensitivity, specificity, potential for r...
متن کاملHepatic Vitamin B6 Metabolism
nM. Thus, pyridloxal-P is the principal B6 vitaimer in plasma. Durinig pyridoxine stupplemiienitation, mealn plasnma levels of the B6 vitaimers anid pyridoxic acidl increasedl to 655±122 aindl 222±55 nM, respectively. The plasma content of pyridoxal-P aind( pyricloxic acidl increased 6-7-fold anid thatt of pyridoxal, 12-fold, but the pyridloxiine level did niot increase. Isolatedlhepatocytes, 1...
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In 1949, Rinehart and Greenberg reported that marked arteriosclerosis occurs in vitamin-B6-deficient monkeys. The present study investigates the relationship between vitamin B6 and arteriosclerosis and summarizes the results. I found that thrombogenesis, disorder of collagen metabolism and production of free radicals may be the processes that cause arteriosclerosis in human and experimental ani...
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ژورنال
عنوان ژورنال: THE JOURNAL OF VITAMINOLOGY
سال: 1955
ISSN: 0022-5398
DOI: 10.5925/jnsv1954.1.4_279