Results 251 to 260 of about 181,873 (305)
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The nature of pigment in pigmented apocrine hidrocystoma
Journal of Cutaneous Pathology, 1985Apocrine hidrocystomas are often pigmented clinically. The cause of this pigmentation is not known. A case of pigmented apocrine hidrocystoma is presented with evidence of melanin as the underlying mechanism of the pigmentation. Review of an additional 150 cases suggests that this is rare.
R. Malhotra, Jag Bhawan
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Liquid chromatography of natural pigments
Biomedical Chromatography, 2000The newest results in the application of various liquid chromatographic techniques for the analysis of natural pigments in pure state and in complicated matrices are compiled. The methods employed for the separation and quantitative determination of the different pigment classes (flavonoids, coumarins, chlorophylls, etc.) are described and critically ...
Teresa Mota +3 more
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Russian Chemical Reviews, 1963
CONTENTS I. Introduction 283 II. Pigments of the aliphatic and alicyclic series 283 III. Pigments of the aromatic series 284 IV.
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CONTENTS I. Introduction 283 II. Pigments of the aliphatic and alicyclic series 283 III. Pigments of the aromatic series 284 IV.
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Natural Food Pigments and Colorants
Current Opinion in Food Science, 2016The natural color of foods is due primarily to carotenoids, anthocyanins, betanin and chlorophylls, either as inherent food constituents or as food or feed additives. These compounds have drawn considerable attention in recent years, not because of their coloring properties, but due to their potential health-promoting effects.
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The bioefficacy of microemulsified natural pigments in egg yolk pigmentation
British Poultry Science, 20141. This study was designed to test the hypothesis that microemulsified carotenoid products show improved bioavailability over corresponding regular preparations, leading to greater yolk pigmentation at lower dosages. 2. The first trial was conducted using a maize-soya bean basal diet supplemented with either 0.25, 0.5, 0.75, 1.0 and 1.25 g/kg of ...
S Z Gue, L B Goh, P Y Chow, S K Leow
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Nature of a Pigmented Substance in the Labyrinth
Acta Oto-Laryngologica, 1964The pigment existing in the loose connective tissue of the posterior labyrinth is originated by hemorrhage, pathological or “physiological” inflammations and wearing out of tissues. Such pigment is contained in macrophages.
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Production of Natural Pigments Using Microorganisms
Journal of Agricultural and Food Chemistry, 2023Pigments are involved in many aspects of human life, including food, cosmetics, and textiles. At present, the pigment market is mainly occupied by synthetic pigments. However, synthetic pigments have gradually presented safety and environmental problems. Therefore, humans have begun to focus on the use of natural pigments. In contrast to the extraction
Zhijie Qin +4 more
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Natural pigments in biology [PDF]
, 1996 This introductory chapter provides a working definition of ‘natural’ pigments. The greater part of the chapter consists of a survey of pigmented compounds found in biology. Two systems of classification are adopted, one based on structural affinities, the second based on the natural occurrence of the pigment in biology.
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The nature of the pigment of silage
The Journal of Agricultural Science, 1923It has been shown that the pigment in silage is phaeophytin, the magnesium-free derivative of chlorophyll. It is produced from chlorophyll by the action of carbonic acid and organic acids developed during fermentation in the silo.
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