Results 211 to 220 of about 183,083 (248)

Building Goal-Directed Cognitive Graphs

Gungi A, Sepúlveda P, Aitsahalia IF, Blanco-Pozo M, Iigaya K.   +4 more
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Ag‐NOR" proteins are present when transcription is impaired

Biology of the Cell, 1984
The use of nucleolar silver staining in plant cells in conditions of impaired transcription, either natural (quiescent cells) or induced (actinomycin D, ethidium bromide and cordycepin treatments), shows that nucleoli with very low transcription rates, compared with controls, contain similar amounts of argyrophilic proteins, as well as the same ...
Sánchez-Pina, M. Amelia, Medina, F. Javier, Fernández-Gómez, M. E., Risueño, María Carmen   +3 more
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Complete dependence between Ag NORs and C-positive heterochromatin revealed by simultaneous Ag-NOR C-banding method

Cell Biology International Reports, 1983
In the present paper we report a technique which permits the simultaneous observation of C-banded material and the active NORs or nucleoli in both mitotic and meiotic chromosomes of mammals and insects. The use of the present technique permits to establish a complete correlation between the C-banded positive regions and the presence of nucleoli ...
J S, Rufas, J, Gosalvez, C, Lopez-Fernandez, H, Cardoso   +3 more
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Ag-NOR staining in mouse sarcoma ascites cells

Journal of Cancer Research and Clinical Oncology, 1983
In sarcoma cells, the nucleoli are small, ill-defined, and are present in large numbers making it difficult to stain them by classical staining procedures. A modified Ag-NOR technique has been applied to detect the nucleolus and the nucleolar-organizing region in the chromosome of a mouse sarcoma-180 ascites cell-line. The cells were found to have 8-14
A, Chaudhuri, S, Ghosh
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“Ag-NORs” are not always true NORs: new evidence in mammals

Cytogenetic and Genome Research, 2002
In spite of uncertainty about the biochemical processes involved, silver staining is a widely used technique for assessing the locations of active NORs in eukaryotic genomes in general, and in mammalian genomes in particular. However, following a previous study of hedgehog chromosomes, we present here a second example from two gerbil species (Rodentia,
G, Dobigny, C, Ozouf-Costaz, C, Bonillo, V, Volobouev   +3 more
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Brain Ag-NOR activity in cholestatic rats with hepatic encephalopathy

Hepatology Research, 2002
The serious repercussions of cholestasis in the liver and other organic systems have led to the creation of many experimental models in efforts to understand better its pathogenesis, prophylaxis and treatment. The extrahepatic cholestasis produces an encephalopathy by the deposition of neurotoxins in the brain similar to alcoholic and other hepatic ...
Luis M., García-Moreno, Ma, Angeles Aller, Nélida M., Conejo, Manuel A., Gómez, Francisco R., Marti;n, Jaime, Arias, Jorge L., Arias   +6 more
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A new version of the Ag−NOR technique. A combination with DAPI staining

The Histochemical Journal, 1996
The Ag-NOR staining technique is widely used for visualizing nucleolar organizer regions (NORs) in various plant and animal tissues. We describe a simple and time-saving combination of Ag-NOR staining with DNA detection by fluorescence microscopy. This modification was tested on cultured cells and semi-thin sections of plastic-embedded tissues.
S M, Biliński, B, Bilińska
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Nucleolar organizer regions (Ag-NORs) in multinuclear osteoclasts

Journal of Bone and Mineral Metabolism, 1998
Osteoclasts are multinuclear bone-resorbing cells. Little is known about regulation of gene expression in these cells and how it changes during the aging of an osteoclast, which is indicated by an increasing number of nuclei. Silver staining of nucleolar organizer regions, so-called Ag-NORs, allows us to assess the activity of rRNA expression.
Narelle Roennfeldt, Hiroshi Fujii, Ming Hao Zheng, Ulrich Seydel   +3 more
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Ultrastructural localization of Ag‐NOR proteins and nucleic acids in reticulated nucleoli

Biology of the Cell, 1984
Nucleoli with a thread‐like fibrillar structure found in several human breast cancer cells were investigated for the localization of Ag‐NOR proteins, RNA, DNA and associated nucleoproteins. Various cytochemical techniques were applied: the one‐step silver method for Ag‐NOR proteins, the Bernhard's staining preferential for RNP, the Feulgen‐like osmium ...
D, Ploton, M, Bendayan, J J, Adnet
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