Results 271 to 280 of about 191,228 (312)
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Short Methods for the Identification of Pigments
American Antiquity, 1975Semi-micro methods have been devised for the identification of the metallic components comprising the pigments used in mesoamerican mural paintings. These methods are based upon samples of 10-15 mgfor each of the colors to be studied and include the reds, greens, blues, blacks and browns. The analyses are performed on individual samples for each color,
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Two rapid pigmentation tests for identification of Cryptococcus neoformans
Journal of Clinical Microbiology, 1982Two tests were developed for the rapid identification of Cryptococcus neoformans based on pigment produced by the organism's phenoloxidase activity. Caffeic acid was incorporated into cornmeal agar, a medium used routinely for yeast identification. When tested on this medium, only C. neoformans isolates produced brown pigment.
C S, Kaufmann, W G, Merz
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Identification and Spectroscopic Characterization of Photoreceptor Pigments
1980From the previous chapters it should be quite clear by now that living organisms interact with the external world via specialized molecules that are able to undergo certain physico-chemical modifications in response to environmental stimuli, thus initiating the process of signalling to the organism that something outside is now different.
Giuliano Colombetti, Francesco Lenci
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[29] Identification of carotenoid pigments in birds
1992Publisher Summary This chapter discusses the identification of carotenoid pigments in birds. One extraordinary feature of avian carotenoids is their packaging. Feathers are unique to birds and form the interface between a remarkable metabolic machine and an unforgiving environment. The colors and patterns of their display are exceedingly important in
Jocelyn Hudon, Alan H. Brush
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Pigment identification by analytical imaging using multispectral images
2009 16th IEEE International Conference on Image Processing (ICIP), 2009This study utilized multispectral images to analyze pigments on a painting. This was accomplished by capturing multispectral images using a high-resolution image scanning system equipped with a monochromatic line CCD. The images were used to reconstruct spectral reflectance by solving a linear transfer function model representing camera response and ...
Jay Arre Toque +2 more
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LIBS identification of pigments from Aula Leopoldina vault
SPIE Proceedings, 2009Aula Leopoldina is the most representative, baroque hall in Wroclaw University. In 2008, LIBS measurements of paintings layers of Aula vault were done. LIBS spectra permitted identification of mineral pigments used for specific colors of painting layers. This identification could not be unambiguous in each case since simultaneous occurrence of elements
R. Ostrowski +3 more
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Computer-assisted Pigment Identification in Artworks
2007False-color infrared represents a well known method for non-invasive pigment identification in artworks. This is particularly useful in the field of conservation of cultural heritage as it provides useful information about painting materials, techniques, retouches.
MAZZEO, ROCCO +3 more
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Identification of pigmented gram negative bacilli.
Health laboratory science, 1978Identification of chromogenic gram-negative bacilli on the basis of pigment production as a taxonomic criterion is unreliable. Because of this, a wide range of morphological, cultural and biochemical characteristics of bacteria in this category was examined.
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Pigment analysis in the identification of "Flavobacteria".
Health laboratory science, 1977Spectral properties of the intracellular pigments of flavpbacteroa were studied by "scanning" ultrasonic preparations, methanol extracts, MF preparations, slide cultures and whole cell suspensions. No genus-specific Amax were demonstrated with methanol extracts.
J R, Cohen, R C, Fuller, W, Litsky
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Pigment identification on medieval manuscripts by Raman microscopy
Journal of Molecular Structure, 1995Abstract The pigments — particularly the inorganic ones — used to illuminate medieval manuscripts are surveyed and the possible methods for their identification briefly summarised. Raman microscopy is now recognized to be the most effective technique for this purpose, and a range of recent applications is surveyed.
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