Results 221 to 230 of about 37,556 (266)

Short Methods for the Identification of Pigments

American Antiquity, 1975
Semi-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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Identification and Inheritance of Pigments in Wild Rice

Crop Science, 1981
The identity and inheritance of anthocyanin pigments in the leaf sheath and staminate florets are not known in wild rice (Zizania aquatica L.). The objectives of this research were to identify the anthocyanins in wild rice and to initiate a study on the inheritance of these pigments.
L. H. Gutek, D. L. Woods, K. W. Clark
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Identification of organic pigments by solution spectrophotometry

Color Research & Application, 1982
AbstractOrganic pigments can be extracted readily into organic solvents from paints, plastics, inks, and other colored samples. If visible (in some cases near‐infrared) wave‐length spectrophotometric data are obtained from the resulting solutions using a log‐absorbance presentation, the pigments can be identified by matching curve shapes to those in a ...
Fred W. Billmeyer, Max Saltzman, Romesh Kumar   +2 more
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Algorithms for Pigment Identification

2000
In the study of pigments in art works, we want to identify which pigments were mixed by the artists. The technique used is the Raman spectroscopy. We designed a specific database and we developed some algorithms for processing and understanding the original ...
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Pigment analysis in the identification of "Flavobacteria".

Health laboratory science, 1977
Spectral 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 by analytical imaging using multispectral images

2009 16th IEEE International Conference on Image Processing (ICIP), 2009
This 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, Yuji Sakatoku, Ari Ide-Ektessabi   +2 more
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Raman microscopy of Greek icons: identification of unusual pigments

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2003
Five Greek icons, made between the 15th and 18th centuries and now belonging to the Victoria and Albert Museum collections, were analysed by energy-dispersive X-ray fluorescence (EDXRF), optical microscopy and Raman microscopy in order to determine the stratigraphy of the artworks and the identity of the pigments used.
Lucia, Burgio, Robin J H, Clark, Krini, Theodoraki   +2 more
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[29] Identification of carotenoid pigments in birds

1992
Publisher 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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Identification and Spectroscopic Characterization of Photoreceptor Pigments

1980
From 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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Spectrophotometric Identification of Feather Pigments in the Brown Leghorn Fowl

Nature, 1964
BROWN Leghorn fowl show a strong sexual dimorphism in the plumage pigmentation, the female colouring being developed only in presence of the ovary whereas the male shades characterize intact or castrate bird alike. All feather tracts differ in some respects between the sexes ; the present discussion centres on the pectoral (breast) region which is ...
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