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15 resultados
[General argyria caused by administration of tobacco-withdrawal tablets containing silver acetate].
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In a 49-year-old man generalised argyria was diagnosed, a systemic dissemination and tissue deposition of silver in the body. The clinical picture was brought about by use of a silver acetate-containing lozenge as a deterrent to smoking. Argyria is characterised by a slate blue-gray discolouration
Two-Dimensional Gel Electrophoretic Analysis of Chromatin-associated Proteins from Leaves of Different Species and Varieties of Nicotiana.
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From different Nicotiana species (N. sylvestris Spegaz. et Comes, N. glutinosa L., and N. tabacum L. cultivars) which differ in their sensitivity towards tobacco mosaic virus (TMV), chromatin-associated protein profiles were compared by two-dimensional polyacrylamide gel electrophoresis. After
Microsatellite alterations on chromosome 9 in chewing tobacco-induced oral squamous cell carcinomas from India.
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Genomic instability as reflected by microsatellite alterations in specific target regions is an important characteristic of oral squamous cell carcinoma (OSCC). Microsatellite instability (MSI) and loss of heterozygosity (LOH) on chromosome 9 has been reported as an early event in oral cancers,
Construction of a directory of tobacco plasma membrane proteins by combined two-dimensional gel electrophoresis and protein sequencing.
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The polypeptide pattern of the plasma membrane from tobacco was studied by two-dimensional gel electrophoresis. When using classical carrier ampholyte isoelectric focusing/sodium dodecyl sulfate-polyacrylamide gel electrophoresis (IEF/SDS-PAGE) approximately 400 polypeptide spots were detected after
The tobacco mosaic virus RNA polymerase complex contains a plant protein related to the RNA-binding subunit of yeast eIF-3.
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A sucrose density gradient-purified, membrane-bound tobacco mosaic virus (tomato strain L) (TMV-L) RNA polymerase containing endogenous RNA template was efficiently solubilized with sodium taurodeoxycholate. Solubilization resulted in an increase in the synthesis of positive-strand, 6.4-kb
Quantification of AgNOR expression in exfoliated oral mucosal cells of tobacco chewers with and without lesion.
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BACKGROUND
Nucleolar organizer regions (NOR) are associated with proliferative activity and represent a diagnostic and prognostic marker.
METHODS
Smears were taken from smokers, tobacco chewers, oral squamous cell carcinoma patients, and normal subjects and evaluated by 2 silver-staining nucleolar
[Generalized argyrosis].
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For many years a 52-year-old patient suffering from duodenal ulcer had taken a silver-containing preparation, the total quantity of silver ingested in this manner amounting to about 35 g. 18 years after the first manifestation of duodenal ulcer a dermatologist diagnosed argyria and confirmed this by
Isolation and characterization of an RNA-dependent RNA polymerase from Nicotiana clevelandii plants infected with red clover necrotic mosaic dianthovirus.
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A template-bound RNA polymerase was isolated from Nicotiana clevelandii plants infected with red clover necrotic mosaic dianthovirus (RCNMV) by differential centrifugation, solubilization with dodecyl beta-D-maltopyranoside, and chromatography on columns of Sephacryl S-400 and Q-Sepharose. Analysis
Characterisation and immunolocation of an 87 kDa polypeptide associated with UDP-glucuronic acid decarboxylase activity from differentiating tobacco cells (Nicotiana tabacum L.).
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UDP-glucuronic acid decarboxylase catalyses the reaction responsible for the formation of UDP-xylose and commits assimilate for the biosynthesis of cell wall polysaccharides and glycosylation of proteins. Xylose-rich polymers such as xylans are a feature of dicot secondary walls. Thus a cell culture
A novel cell division factor from tobacco 2B-13 cells that induced cell division in auxin-starved tobacco BY-2 cells.
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Effects of auxin as plant hormones are widespread; in fact in almost all aspects of plant growth and development auxin plays a pivotal role. Although auxin is required for propagating cell division in plant cells, its effect upon cell division is least understood. If auxin is depleted from the
Nicotine produces selective degeneration in the medial habenula and fasciculus retroflexus.
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Nicotine's neurotoxic properties in rats were investigated by administering (-)-nicotine tartrate for 5 days either continuously in doses of 5.01, 5.72, 6.44, 7.13, 20.41 and 43.1 mg/kg/day via osmotic minipump or intermittently at 11.32 mg/kg/day via one daily subcutaneous injection. As assessed by
Differential immunological cross-reactions with antisera against the V-ATPase of Kalanchoë daigremontiana reveal structural differences of V-ATPase subunits of different plant species.
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Two antisera (ATP88 and ATP95) raised against the V-ATPase holoenzyme of Kalanchoë daigremontiana were tested for their cross-reactivity with subunits of V-ATPases from other plant species. V-ATPases from Kalanchoë blossfeldiana, Mesembryanthemum crystallinum, Nicotiana tabacum, Lycopersicon
Programmed cell death: dying cells synthesize a co-ordinated, unique set of proteins in two different episodes of cell death.
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Intersegmental muscles of the tobacco hornworm, Manduca sexta, degenerate promptly after the ecdysis of the moth. Protein content of the growing, static, and degenerating muscle was evaluated by two-dimensional electrophoresis; RNA was isolated from the muscle and translated, and the translation
Oral leukoplakia-epidemiological survey and histochemical analysis of 107 cases in Brazil
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Objective: To perform an epidemiological survey comparing the cell proliferative activity of 107 cases of oral leukoplakia with their clinical and histopathological characteristics.
Materials and methods:
The hamster cheek pouch model for field cancerization studies.
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External carcinogens, such as tobacco and alcohol, induce molecular changes in large areas of oral mucosa, which increase the risk of malignant transformation. This condition, known as 'field cancerization', can be detected in biopsy specimens using histochemical techniques, even before histological
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