Serum total vitamin B12 (TB12) measurement is the recommended first-line test but the result can be misleading because of method biases approaching 30% and the presence of different circulating forms of this vitamin. Approximately 80% of vitamin B12 in blood is bound in inert complexes with ...
0 ~ 4 ℃ storage is not an activity decreased, the detection of these projects must be timely and fast; some (such as creatine kinase) influenced by exercise and other factors. Avoid hemolysis occurs when blood is also important And, more particularly potassium, LDH and other measurement. ...
W. et al. Measurement of total vitamin B12 and holotranscobalamin, singly and in combination, in screening for metabolic vitamin B12 deficiency. Clin. Chem. 52, 278–285 (2006). Google Scholar Nexo, E. & Hoffmann-Lucke, E. Holotranscobalamin, a marker of vitamin B-12 status: ...
Radioactive vitamin B12 absorption studies: results of direct measurement of radioactivity in the blood. A physiological test dose of 0.46 µg. vitamin B12 labelled with 60Co (0.5 µC.) was given by mouth after an overnight fast and 2 hr. before breakfast... A Doscherholmen,PS Hagen...
Intestinal vitamin B12 level measurement Snap-frozen cecal and colonic digesta samples were weighed and homogenized with two rounds of beating (30 s at 4 m/s with a cooling step on ice) in a proprietary buffer provided by Calgary Laboratory Services: Diagnostic and Scientific Research Centre (Cal...
The extracted vitamin is then determined by differential spectrophotometric measurement. Assay results are presented in comparison... Fisher,A R. - 《Journal of Agricultural & Food Chemistry》 被引量: 25发表: 1953年 Assay methods of vitamin B12 Benzyl alcohol or n-propyl alcohol is used to ...
The proposed procedure is especially suitable for the measurement of B12 in blood serum because rise in pH and precipitation of serum proteins during incubation are minimized. Like bacillaris. the z strain allows the distinction between "combined" and "uncombined" B12 in serum. Serum may be an...
doxycycline and a bolus of vitamin B12as shown in the schematic. Met levels were measured in the indicated serum samples by mass spectrometry. Onlyn = 4 WT (day 0) and OSKM (day 6) mice are represented, as the blood volume was insufficient. Welch’s two-samplet-test was used to...
First, the circulating folate and vitamin B12 levels were based on a single serum measurement, which may not accurately reflect the long-term status. Second, covariates collected at baseline may change over time, which may attenuate the true association of serum folate and vitamin B12 levels with...
Unless otherwise stated, all exact values provided herein are representative of corresponding approximate values and vice versa (e.g., all exact exemplary values provided with respect to a particular factor or measurement can be considered to also provide a corresponding approximate measurement, modified...