Results 261 to 270 of about 191,228 (312)
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Identification of Oxysterols in Human Bile and Pigment Gallstones
Gastroenterology, 2001Although cholesterol is the most abundant sterol in animal tissues, oxidized products of cholesterol (oxysterols) also occur in mammalian organs and blood and are cytotoxic, atherogenic, and carcinogenic. However, the presence of oxysterols in bile or gallstones has never been reported.Fresh human bile and gallstones were collected.
Lee, SP, Haigh, WGeoffrey
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IDENTIFICATION OF MALIGNANT POTENTIALITIES OF MELANOCYTIC (PIGMENTED) NEVUS
Journal of the American Medical Association, 1956• An attempt is made to state the clinical features by which the physician can decide whether a common pigmented mole, appropriately designated as a melanocytic nevus, should be removed. At the junction or interface between epidermis and dermis lie the melanocytes whose multiplication and extrusion into the dermis is called junctional activity ...
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A rapid pigmentation test for identification ofCryptococcus neoformans
Antonie van Leeuwenhoek, 1978A rapid pigmentation test for identification of Cryptococcus neoformans is described. The method is based on the formation of a characteristic, mouse-grey to violaceous-black pigment when shake cultures of C. neoformans in a phosphate-buffered, l-DOPA - ferric citrate medium are incubated at 37 C for one hour.
D K, Paliwal, H S, Randhawa
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Identification of organic pigments by solution spectrophotometry
Color Research & Application, 1982AbstractOrganic 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 +2 more
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Algorithms for Pigment Identification
2000In 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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DARK BROWN AMNIOTIC FLUID—IDENTIFICATION OF CONTRIBUTING PIGMENTS
BJOG: An International Journal of Obstetrics & Gynaecology, 1981SummaryA total of 208 second trimester amniotic fluid samples were examined visually and spectrophotometrically for pigmentation. Of these, 15 samples had dark brown colouration. Fourteen of the 15 samples had chemically detectable haemoglobin derived pigments and one had meconium only.
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Raman microscopy of Greek icons: identification of unusual pigments
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2003Five 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 +2 more
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Identification of GABA receptors in chick retinal pigment epithelium
Neuroscience Letters, 2013The retinal pigment epithelium (RPE) is a multifunctional, monolayer of cells located between the neural retina and the choroicapillaris. γ-Aminobutyric acid (GABA) is the most important inhibitory neurotransmitter in the retina and GABA receptors are known to be present in chick retina, sclera and cornea.
Cheng, Zhen-Ying +3 more
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The isolation and identification of indigoid pigments from urine
Clinica Chimica Acta, 1988A purple pigment, phyriaviolin, and a blue pigment, phyriaazulin, have been found in relatively large amounts in the urine of patients suffering from two diverse pathological conditions, porphyria cutanea tarda and Crohn's disease. The two pigments have been characterised by chemical, spectroscopic, and chromatographic studies and identified to be ...
A H, Jackson +4 more
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Potential of electrospray mass spectrometry for meat pigment identification
Meat Science, 1993The potential of electrospray mass spectrometry (ESMS) to identify haem pigments from different species has been investigated. Purified haemoglobin and myoglobin from various sources (pig, beef, sheep and horse) were analysed by ESMS. The spectra showed ions corresponding to the molecular weights of the globin portions of the haemoproteins. When boiled
A J, Taylor +4 more
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