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C
Système International d’Unités

In the text of this report, the Système International d’Unités (SI units) are presented for hematological and clinical chemistry values, with traditional units in parentheses. The conversion factors for hematological and clinical chemistry values are given in Table C-1.



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OCR for page 451
DRI Dietary Reference Intakes: For Thiamin, Riboflavin, Niacin, Vitamin B6, Folate, Vitamin B12, Pantothenic Acid, Biotin, and Choline C Système International d’Unités In the text of this report, the Système International d’Unités (SI units) are presented for hematological and clinical chemistry values, with traditional units in parentheses. The conversion factors for hematological and clinical chemistry values are given in Table C-1.

OCR for page 451
DRI Dietary Reference Intakes: For Thiamin, Riboflavin, Niacin, Vitamin B6, Folate, Vitamin B12, Pantothenic Acid, Biotin, and Choline TABLE C-1 Factors Used to Convert Between Traditional Units and the Système International d’Unités (SI Units) Nutrient Traditional Unit Conversion Factor SI Unit Molecular Weight Thiamin µg/24h 0.003324468 µmol/d 300.8 Thiamin hydrochloride µg/24h 0.00296472 µmol/d 337.3 Riboflavin µg/dL 26.5674814 nmol/L 376.4 Flavin mononucleotide (FMN) ng/mL 2.191540653 nmol/L 456.3 Flavin-adenine dinucleotide (FAD) ng/mL 1.205545509 nmol/L 829.5 Niacin mg/d 8.123476848 µmol/d 123.1 Niacinamide mg/d 8.19000819 µmol/d 122.1 Pyridoxine hydrochloride mg 4.86381323 µmol 205.6 Vitamin B6 ng/mL 5.910165485 nmol/L 169.2 Pyridoxal ng/mL 5.980861244 nmol/L 167.2 Pyridoxamine ng/mL 5.94530321 nmol/L 168.2 Pyridoxal 5′-phosphate ng/mL 4.046944557 nmol/L 247.1 Folic acida ng/mL 2.265518804 nmol/L 441.4 5-Methyltetrahydrofolateb ng/mL 2.176752286 nmol/L 459.4 Vitamin B12 (cyano) pg/mL 0.737789582 pmol/L 1,355.4 Coenzyme B12 pg/mL 0.633071664 pmol/L 1,579.6 Methylcobalamin pg/mL 0.743826242 pmol/L 1,344.4 Pantothenic acid µg/mL 4.562043796 µmol/L 219.2 Coenzyme A µg/mL 1.302931596 µmol/L 767.5 Biotin ng/mL 4.093327876 nmol/L 244.3 Choline base mg/mL 8.250825083 mmol/L 121.2 Choline chloride mg/mL 7.163323782 mmol/L 139.6 NOTE: Conversion factors convert traditional values to SI units. To convert to SI units, multiply the traditional unit by the conversion factor. To convert to traditional units, divide the SI unit by the conversion factor. a Pteroylglutamic acid. b Most predominant form in serum, plasma, and erythrocytes.