Reference

Concentrations of vitamin E in various neuroanatomical regions and subcellular fractions, and the uptake of vitamin E by specific areas, of rat brain

Concentrations of vitamin E in various neuroanatomical regions and subcellular fractions, and the uptake of vitamin E by specific areas, of rat brain. Vatassery, G. T.; Angerhofer, C. K.; Knox, C.In this study，59-02-9 is also used. A.; Deshmukh, D. S. (Educ. Clin. Cent., VA Med. Cent., Minneapolis, MN 55417, USA). Biochim. Biophys. Acta, 792(2), 118-22 (English) 1984. CODEN: BBACAQ. ISSN: 0006-3002. DOCUMENT TYPE: Journal CA Section: 13 (Mammalian Biochemistry) Vitamin E (a-tocopherol) concns. were detd. by high-performance liq. chromatog. in different anatomical regions of the brain from 3-mo-old Fischer 344 rats. Gray matter from cerebellum and cervical spinal cord contained the lowest concns., whereas gray matter from the frontal cortex and thalamus had the highest concns. of vitamin E. Radioactive a-tocopherol injected i.v. into the rat was readily taken up by brain although the level of uptake was very low compared with the liver. The ratios of brain-to-serum radioactivities ranged from 0.011 to 0.016 depending upon the brain region. Cerebellar gray matter is characterized by a low concn. of unlabeled a-tocopherol and a high level of uptake of radioactive a-tocopherol and thus is particularly active in the metab. of vitamin E. Concns. of unlabeled a-tocopherol were highest in microsomal and mitochondrial fractions and were the lowest in cytosol and nuclear fractions. .

Determination of vitamin E in oils and foods by fluorometer and TLC scanner

Determination of vitamin E in oils and foods by fluorometer and TLC scanner. Zuo, Jingshan; Zhang, Lijuan; Chen, Ziqian; Ke, Weilun (Shanghai Food Ind. Res. Inst. 119-13-1 and 1406-18-4 are also occured in this study., Shanghai, Peop. Rep. China). Yingyang Xuebao, 5(3), 289-97 (Chinese) 1983. CODEN: YYHPA4. ISSN: 0512-7955. DOCUMENT TYPE: Journal CA Section: 17 (Food and Feed Chemistry) Peanut oil was sapond. and total vitamin E [1406-18-4] was detd. in the unsaponifiable fraction by fluorometry at 285 excitation and 324 nm emission. Alternatively the vitamin E isomers (a- [59-02-9], b- [148-03-8], g- [7616-22-0], and d-tocopherol [119-13-1]) may be sepd. by TLC and quantitated by fluorometric scanning of the plates. Recoveries and std. deviations for the fluorometric method were 99.3% and 0.58 mg/100 g, resp., and for the TLC method the values were 103.04% and 0.959 mg/100 g, resp. .