Results 251 to 260 of about 167,754 (305)
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Perylene pigment wastewater treatment by fenton-enhanced biological process
Environmental Research, 2020Polycyclic aromatic hydrocarbons (PAHs) are regarded as priority pollutants owing to their toxic, mutagenic and carcinogenic characteristics. Perylene is a kind of 5-ring PAH with biological toxicity, and classified as a class III carcinogen by the World Health Organization (WHO). Nowadays, some of its derivatives are often used as industrial pigments.
Rui-Yun, Ren +8 more
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Phototrophic pigment production with microalgae: biological constraints and opportunities
Journal of Phycology, 2014There is increasing interest in naturally produced colorants, and microalgae represent a bio‐technologically interesting source due to their wide range of colored pigments, including chlorophylls (green), carotenoids (red, orange and yellow), and phycobiliproteins (red and blue).
Mulders, K.J.M. +3 more
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Biological image segmentation based on object pigmentation
Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference, 2002A methodology for segmenting biological images based on object pigmentation is proposed. The object of interest is extracted based on MacAdam's just noticeable difference (see J. Opti. Soc. Am., vol.32, p.247-74, 1942). The method combines pictorial and spectral information, into a single valued total color difference.
J. Zheng, K. Valavanis, J. Gauch
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Planta, 2011
To study the formation of the photosynthetic apparatus in nature, the carotenoid and chlorophyllous pigment compositions of differently developed leaf primordia in closed and opening buds of common ash (Fraxinus excelsior L.) and horse chestnut (Aesculus hippocastanum L.) as well as in closed buds of tree of heaven (Ailanthus altissima P.
Solymosi, Katalin +4 more
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To study the formation of the photosynthetic apparatus in nature, the carotenoid and chlorophyllous pigment compositions of differently developed leaf primordia in closed and opening buds of common ash (Fraxinus excelsior L.) and horse chestnut (Aesculus hippocastanum L.) as well as in closed buds of tree of heaven (Ailanthus altissima P.
Solymosi, Katalin +4 more
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Biological Perspectives on Human Pigmentation
1991Skin colour is perhaps the most decisive and abused physical characteristic of humankind. This book presents a multidisciplinary overview of how and why human populations vary so markedly in their skin colour. The biological aspects of the pigment cell and its production of melanin are reviewed.
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Biological Aspects of Pigment Cell Research
1966An important requisite in the struggle for life of many animals is camouflage. This capacity enables them to hide from predatory enemies or to spy upon their prey unobserved. Numerous invertebrates and nearly all poikilotherm vertebrates have developed this faculty into a fascinating art. These animals are able to adapt the colour of their skin rapidly
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Photoelectric and Magneto-Orientation Effects in Pigmented Biological Membranes
Journal of Colloid and Interface Science, 1977Abstract Photoelectric and magneto-orientation effects in pigmented biological membranes are analyzed and discussed with special reference to three different levels of order in the membrane structures. The kinetic results of photoelectric responses from an artificial pigmented bilayer lipid membrane/aqueous redox system, measured by a tunable voltage
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Neobonellin, a new biologically active pigment fromBonellia viridis
Experientia, 1978A difference of possible physiological significance is reported in the chemical nature of the green integumentary pigment of the echiuroidBonellia viridis, the proboscis of which contains the known bonellin (1, R=H) as the major constituent, while the body skin is mainly pigmented by an isoleucine conjugate, neobonellin, formulated tentatively as2 (R=H)
L. Cariello +3 more
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Biological Aspects of Marine Biofilm Bacterial Pigment
Marine bacterial species contribute to a significant part of the oceanic population, which substantially produces biologically effectual moieties having various medical and industrial applications. The use of marine-derived bacterial pigments displays a snowballing effect in recent times, being natural, environmentally safe, and health beneficial ...Balasubramanian Vellaisamy +4 more
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Cambridge Studies in Biological Anthropology, No 7, Biological Perspectives on Human Pigmentation
Archives of Dermatology, 1992This book provides a general overview of the distribution, structure, function, and genetic determinants of human melanocytes and the mechanisms involved in their differentiation in vivo. The description of the biological determinants of melanogenesis is relatively superficial but does provide updated information and references compared with previously
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