Colour Reactions Attributed to Vitamin A

Carr, Francis H.; Price, Ernest Arthur

doi:10.1042/bj0200497

Cited by 388 publications

(61 citation statements)

References 2 publications

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“…Colorimetry can measure retinol and only total carotenoids, the detected fraction is then erroneously called`b-carotene'. In particular, values derived from the old method of Carr & Price, 1926 Values for single carotenoids are available either for bcarotene alone (F fat, F milk, D BLS, E 92, S 94 and S 96), or also for other carotenoids (E carot, D SFK, and as appendixes in GB veg and GB fruit). Care should be taken when comparing vitamin A values between tables.…”

Section: Not Mentionedmentioning

confidence: 99%

Comparison of nutrients in the food composition tables available in the nine European countries participating in EPIC

et al. 1999

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and Sweden. They were compared from the point view of availability, de®nition, analytical methods, and mode of expression of the nutrients of interest for EPIC, and it was seen that most of the nutrients in the tables are analysed and expressed in a compatible way. For some nutrients, however, common methods and de®nitions (folate, dietary ®bre), or modes of expression (energy, protein, carbohydrates, carotenes, vitamin A and E) have not yet been agreed upon, so values are not comparable. For vitamin C a wide range of values are found due to the high natural variation in foods. For compiled tables, an additional problem is the use of several sources which may mean that the nutritional values are not comparable within the same table; and these values cannot be converted if the source is not stated. In addition, some tables were compiled using food composition values produced over 20 years ago with outdated analytical methods. In view of the inconsistent values for some nutrients and due to the large amount of foods reported within EPIC, it was concluded that standardised food composition tables have to be developed for the nine European countries involved in EPIC in order to provide comparable nutrient intake data.

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Section: Not Mentionedmentioning

confidence: 99%

Comparison of nutrients in the food composition tables available in the nine European countries participating in EPIC

et al. 1999

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“…Estimation of Vitamin-A: Vitamin A was estimated by method of Carr and Price [25]. 100 mg of fresh leaf tissue sample was weighed and ground well using mortar and pestle.…”

Section: Estimation Of Total Phenolsmentioning

confidence: 99%

Study of Antioxidant Activity and Immune Stimulating Potency of the Ethnomedicinal Plant, Cassia alata (L.) Roxb

Chatterjee¹,

Chatterjee²,

Dey³

et al. 2012

Med Aromat Plants

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“…The columns were eluted with light petroleum containing increasing amounts of acetone. The pigments were treated with the Carr-Price reagent (Carr & Price, 1926) to establish their carotenoid nature.…”

Section: Endogenous Reserve Materialsmentioning

confidence: 99%

Taxonomy of the Aerobic Pseudomonads: Pseudomonas diminuta and P. vesiculare

Ballard

Doudoroff

Stanier

et al. 1968

Journal of General Microbiology

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SUMMARYThirteen strains previously assigned to the species Pseudomonas diminuta and P. vesiculare were subjected to detailed characterization. Ten of these strains could be identified as P. diminuta and two as P. vesiculare. These two species can be readily distinguished by differences in their nutritional spectra, their growth factor requirements and their pigmentation. The DNA of the two strains of P. vesiculare contained 65.8 moles yo guanine +cytosine (GC), and the DNA of the ten strains of P. diminuta: from 66.3 to 67.3 moles yo. One of the 13 strains examined had DNA of significantly lower GC content (62.2 moles yo) and also differed in several phenotypic respects from both species; it is probably a monotypic representative of a third species, as yet unnamed.All the strains examined share a series of distinctive properties, which justify their recognition as a special subgroup of aerobic pseudomonads. The defining characters of this subgroup include : monotrichous flagellation, with flagella of very short wavelength; a requirement for pantothenate, biotin and cyanocobalamin; a limited range of carbon sources; production of acid from primary alcohols by all strains that can utilize alcohols; inability to denitrify or to use nitrate as a nitrogen source; and accumulation of poly-P-hydroxybutyrate as an intracellular reserve.

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Colour Reactions Attributed to Vitamin A

Cited by 388 publications

References 2 publications

Comparison of nutrients in the food composition tables available in the nine European countries participating in EPIC

Comparison of nutrients in the food composition tables available in the nine European countries participating in EPIC

Study of Antioxidant Activity and Immune Stimulating Potency of the Ethnomedicinal Plant, Cassia alata (L.) Roxb

Taxonomy of the Aerobic Pseudomonads: Pseudomonas diminuta and P. vesiculare

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