Results 271 to 280 of about 2,342,144 (289)
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Cytobios, 1993
Seven Gentile di Puglia sheep (Ovis aries L., 2n = 54) reared in southern Italy were cytogenetically investigated to reveal which chromosomes carry nucleolus organizer regions (NORs). The use of sequential GBG/Ag-NOR and RBG/Ag-NOR techniques in prometaphase preparations revealed NOR-localization at the telomeres of chromosomes 1p, 2q, 3q, 6 and 25 on ...
Di Meo GP +3 more
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Seven Gentile di Puglia sheep (Ovis aries L., 2n = 54) reared in southern Italy were cytogenetically investigated to reveal which chromosomes carry nucleolus organizer regions (NORs). The use of sequential GBG/Ag-NOR and RBG/Ag-NOR techniques in prometaphase preparations revealed NOR-localization at the telomeres of chromosomes 1p, 2q, 3q, 6 and 25 on ...
Di Meo GP +3 more
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A population analysis of Robertsonian and Ag-NOR polymorphisms in brown trout (Salmo trutta)
Theoretical and Applied Genetics, 1994An analysis of Robertsonian polymorphism and variation in the number of active NORs has been carried out in several populations of brown trout (Salmo trutta) from Northwestern Spain. The karyotype of this species appears to be soundly established, and essentially no variation has been found in chromosome number.
Castro, J +4 more
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Correlation of Ag-NOR protein measurements with prognosis in canine transmissible venereal tumour
Journal of Comparative Pathology, 1995Ten canine transmissible venereal tumour (TVT) cases were studied by digital image analysis quantification on sections stained with silver to demonstrate nucleolar organizer regions (Ag-NORs). In each animal, 100 neoplastic cells were randomly selected for evaluation. The following parameters were measured or calculated: area of nucleus, area of Ag-NOR
A, Harmelin, A, Zuckerman, A, Nyska
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Ag-NOR staining and in situ hybridization of rDNA in the chromosomes of the South American camelids
Genetica, 1989The location and frequency of Ag-stained NORs and sites of rDNA hybridization were studied in the chromosomes of the South American camelids. In the four camelids these regions occur distally on chromosomes 18, 21, and 27 and the smallest biarmed elements. Quantitative analysis of NOR distribution showed variations between both cells and species.
L, Vidal-Rioja +2 more
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The Ag-NOR proteins and transcription and duplication of ribosomal genes in mammalian cell nucleoli
Chromosoma, 1991The relationship between the Ag-NOR (silver-stained Nucleolar Organizer Region) proteins and the functional-structural organization of the nucleolar ribosomal chromatin was studied in regenerating and cortisol-stimulated rat hepatocytes. Statistical analysis of Ag-NOR proteins, carried out with an automated image analyzer, indicated that in ...
A, Pession +7 more
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Toxicology Letters, 1998
The induction of micronuclei (MN) in human lymphocytes can be used as a measure for the cytogenetic damage. The aim of this work was to study the induction, frequency, distribution and Ag-NOR activity in micronuclei of medical personell who administered antineoplastic drugs. For the study healthy non-smoking female subjects were chosen.
Kopjar, Nevenka, Garaj-Vrhovac, Vera
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The induction of micronuclei (MN) in human lymphocytes can be used as a measure for the cytogenetic damage. The aim of this work was to study the induction, frequency, distribution and Ag-NOR activity in micronuclei of medical personell who administered antineoplastic drugs. For the study healthy non-smoking female subjects were chosen.
Kopjar, Nevenka, Garaj-Vrhovac, Vera
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Identification of Ag-NOR Proteins, Markers of Proliferation Related to Ribosomal Gene Activity
Experimental Cell Research, 1994During mitosis, ribosomal genes are associated with a set of silver-stained nucleolar proteins designated Ag-nucleolar organizer region (NOR) proteins. The amount of Ag-NOR protein, estimated during interphase, may be used as marker of cell proliferation with a prognostic value for several human cancers.
P, Roussel, D, Hernandez-Verdun
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The nucleolar organizer regions associated protein (Ag-NORs) in salivary gland tumors
International Journal of Oral and Maxillofacial Surgery, 1989A silver colloid technique used to identify nucleolar organizer regions associated protein (Ag-NORs) has been applied to 20 salivary gland tumors. The method was readily applicable to the preparations of paraffin-embedded sections and the Ag-NORs were enumerated with ease.
K, Matsumura +3 more
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Expression of silver-stained nucleolar organizing regions (Ag-NORs) in human cancer
Cytogenetics and Cell Genetics, 2008Five cases of ovarian adenocarcinoma, three cases of endometrial adenocarcinoma, and one case of transitional cell carcinoma of the bladder have been studied for expression of silver-stained nucleolar organizing regions (Ag-NORs). The modal chromosome number of these tumors varied from 37 to 72, with a wide range of chromosome numbers (13 to 150).
J M, Trent, D A, Carlin, J R, Davis
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[Research on the regular pattern of Ag-NOR changes in patients with cancer].
Zhonghua zhong liu za zhi [Chinese journal of oncology], 2002To correlate the relationship between rDNA transcriptional activity of CD4+ helper T cells and immunity in patients with cancer through silver stainability of nucleolus organizing regions (Ag-NORs).The Th(CD4+) rDNA transcriptional activity was compared among patients with cancer, infectious diseases, non-cancerous non-infectious diseases through image
L, Chen, Y, Wan, L, Ding
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