C-banding at meiosis as a means of analyzing cytogenetic structure in wheat

1985 ◽  
Vol 27 (6) ◽  
pp. 689-696 ◽  
Author(s):  
A. Fominaya ◽  
N. Jouve
Keyword(s):  
Quantitative Analysis ◽  
Chinese Spring ◽  
Monosomic Analysis ◽  
C Banding ◽  
Staining Techniques

The characterization of reciprocal interchanges between chromosomes of wheat in the progeny of the backcross ((T. aestivum H-53 × S. cereale) × T. aestivum H-53) using Feulgen and C-banding staining techniques has been attempted. The translocated chromosomes were studied in detail in three lines using monosomic analysis. In the F1 of the crosses between these lines and the 21 monosomic lines of 'Chinese Spring' a total of five interchanges were identified. Using a Giemsa C-banding procedure it was possible to confirm the identity of the interchange chromosome pairs that were previously identified by monosomic analysis. Moreover, a total of 12 new interchanges were characterized or identified. C-banding also facilitated the identification of the arms involved in translocations and permitted the quantitative analysis of each multivalent in multiple interchange heterozygotes. The comparative availability of Feulgen and C-banding in studies of cytogenetic structure in wheat is discussed.Key words: C-banding, meiosis, heterochromatin, translocations, wheat, Triticum.

Characterization of Pacific abalone(Haliotis discus hannai)karyotype by C-banding and fluorescence in situ hybridization with rDNA

2013 ◽  
Vol 37 (7) ◽  
pp. 1002 ◽  
Author(s):  
Mingyi CAI ◽  
Xiande LIU ◽  
Ziying CHEN ◽  
Bingbing CAI ◽  
Caihuan KE
Keyword(s):  
In Situ Hybridization ◽  
Fluorescence In Situ Hybridization ◽  
Haliotis Discus Hannai ◽  
Pacific Abalone ◽  
C Banding ◽  
Haliotis Discus ◽  
Abalone Haliotis Discus

scholarly journals Complexity Analysis of Escher’s Art

Entropy ◽  
2019 ◽  
Vol 21 (6) ◽  
pp. 553 ◽  
Author(s):  
António M. Lopes ◽  
J. A. Tenreiro Machado
Keyword(s):  
Complex System ◽  
Quantitative Analysis ◽  
Complexity Analysis ◽  
Quantitative Characterization ◽  
Cultural Economic ◽  
Scaling Technique ◽  
Artistic Production ◽  
Formidable Challenge ◽  
Visualization Techniques

Art is the output of a complex system based on the human spirit and driven by several inputs that embed social, cultural, economic and technological aspects of a given epoch. A solid quantitative analysis of art poses considerable difficulties and reaching assertive conclusions is a formidable challenge. In this paper, we adopt complexity indices, dimensionality-reduction and visualization techniques for studying the evolution of Escher’s art. Grayscale versions of 457 artworks are analyzed by means of complexity indices and represented using the multidimensional scaling technique. The results are correlated with the distinct periods of Escher’s artistic production. The time evolution of the complexity and the emergent patterns demonstrate the effectiveness of the approach for a quantitative characterization of art.

scholarly journals Characterization of Spent Ni-MH Batteries

2012 ◽  
Vol 730-732 ◽  
pp. 569-574
Author(s):  
Marta Cabral ◽  
Fernanda Margarido ◽  
Carlos A. Nogueira
Keyword(s):  
Quantitative Analysis ◽  
Electrode Materials ◽  
Phase Identification ◽  
Recycling Process ◽  
X Ray ◽  
Leaching Experiments ◽  
Plastic Components ◽  
Definition Of ◽  
Physical And Chemical

Spent Ni-MH batteries are not considered too dangerous for the environment, but they have a considerable economical value due to the chemical composition of electrodes which are highly concentrated in metals. The present work aimed at the physical and chemical characterisation of spent cylindrical and thin prismatic Ni-MH batteries, contributing for a better definition of the recycling process of these spent products. The electrode materials correspond to more than 50% of the batteries weight and contain essentially nickel and rare earths (RE), and other secondary elements (Co, Mn, Al). The remaining components are the steel parts from the external case and supporting grids (near 30%) containing Fe and Ni, and the plastic components (<10%). Elemental quantitative analysis showed that the electrodes are highly concentrated in metals. Phase identification by X-ray powder diffraction combined with chemical analysis and leaching experiments allowed advancing the electrode materials composition. The cathode is essentially constituted by 6% metallic Ni, 66% Ni(OH)2, 4.3% Co(OH)2 and the anode consists mainly in 62% RENi5 and 17% of substitutes and/or additives such as Co, Mn and Al.

scholarly journals Cytogenetical analyses in three fish species of the genus Pimelodus(Siluriformes: Pimelodidae) from rio São Francisco: considerations about the karyotypical evolution in the genus

2005 ◽  
Vol 3 (2) ◽  
pp. 285-290 ◽  
Author(s):  
Caroline Garcia ◽  
Orlando Moreira Filho
Keyword(s):  
Chromosome Pair ◽  
Chromosomal Rearrangements ◽  
Nucleolar Organizer ◽  
Differential Staining ◽  
Nucleolar Organizer Regions ◽  
C Banding ◽  
Heteromorphic Sex Chromosomes ◽  
Chromosomal Markers ◽  
Staining Techniques ◽  
Species Specific

Karyotypes and other chromosomal markers were investigated in three species of the catfish genus Pimelodus, namely P. fur, P. maculatus and Pimelodus sp., from municipality of Três Marias, Minas Gerais, Brazil, using differential staining techniques (C-banding, Silver nitrate and CMA3 staining). The diploid chromosome number was 2n = 56 in P. maculatus and Pimelodus sp., while in P. fur 2n = 54. The karyotype of P. fur consisted in 32M + 8SM + 6ST + 8A with fundamental number (NF) of 100, that of P. maculatus 32M + 12SM + 12A with NF = 112, and that of Pimelodus sp. had 32M + 12Sm + 6ST + 6A with NF = 106.The nucleolar organizer regions (NORs) in all three species were invariably detected in telomeres of longer arm of the 20th chromosome pair. These sites were also positive after CMA3 and C-banding. No heteromorphic sex chromosomes were detected and C-banding pattern was species specific. Inferences about the karyotype differentiation in Pimelodus and putative chromosomal rearrangements are hypohesized.

scholarly journals Cytogenetic characterization of Melipona rufiventris Lepeletier 1836 and Melipona mondury Smith 1863 (Hymenoptera, Apidae) by C banding and fluorochromes staining

2008 ◽  
Vol 31 (1) ◽  
pp. 49-52 ◽  
Author(s):  
Denilce Meneses Lopes ◽  
Sílvia das Graças Pompolo ◽  
Lúcio Antônio de Oliveira Campos ◽  
Mara Garcia Tavares
Keyword(s):  
C Banding ◽  
Cytogenetic Characterization

scholarly journals Quantitative analysis and partial characterization of cytotoxin production by Salmonella strains.

1988 ◽  
Vol 56 (12) ◽  
pp. 3089-3094 ◽  
Author(s):  
S Ashkenazi ◽  
T G Cleary ◽  
B E Murray ◽  
A Wanger ◽  
L K Pickering
Keyword(s):  
Quantitative Analysis ◽  
Partial Characterization

scholarly journals Synthesis and Characterization of a Ternary Nanocomposite Based on CdSe Decorated Graphene-TiO2 and its Application in the Quantitative Analysis of Alcohol with Reduction of CO2

2018 ◽  
Vol 55 (4) ◽  
pp. 381-391 ◽  
Author(s):  
Asghar Ali ◽  
Md Rokon Dowla Biswas ◽  
Yonrapach Areerob ◽  
Dinh Cung Tien Nguyen ◽  
Won-Chun Oh
Keyword(s):  
Quantitative Analysis ◽  
Synthesis And Characterization ◽  
Ternary Nanocomposite ◽  
Reduction Of Co2

A novel method for purification, quantitative analysis and characterization of microplastic fibers using Micro-FTIR

Chemosphere ◽  
2020 ◽  
Vol 238 ◽  
pp. 124564 ◽  
Author(s):  
Fabiana Corami ◽  
Beatrice Rosso ◽  
Barbara Bravo ◽  
Andrea Gambaro ◽  
Carlo Barbante
Keyword(s):  
Quantitative Analysis ◽  
Novel Method

scholarly journals Resonant-XRD Characterization of Nanoalloyed Au-Pd Catalysts for the Direct Synthesis of H2O2: Quantitative Analysis of Size Dependent Composition of the Nanoparticles †

2019 ◽  
Vol 9 (15) ◽  
pp. 2959 ◽  
Author(s):  
Paolo Centomo ◽  
Patrizia Canton ◽  
Claudio Burato ◽  
Carlo Meneghini ◽  
Marco Zecca
Keyword(s):  
Quantitative Analysis ◽  
Metal Nanoparticles ◽  
Metal Surface ◽  
Bimetallic Nanoparticles ◽  
Amorphous Polymer ◽  
Direct Synthesis ◽  
Relative Number ◽  
Pd Catalysts ◽  
X Ray

The focus of this work is on the relationship between the quantitative structural characterization of bimetallic Au-Pd nanoparticles dispersed in an amorphous polymer matrix and their catalytic activity in the direct synthesis of hydrogen peroxide (DS reaction). Resonant X-ray powder diffraction with synchrotron radiation was employed to probe selectively and to reveal fine details of the structure of bimetallic nanoparticles embedded in the support. The semi-quantitative analysis of the resonant X-ray powdered diffraction data, made on a large number of metal nanoparticles, shows that in one of the polymer-supported Au-Pd catalyst for the DS reaction (P75) featured by an overall molar Pd/Au of about 5.54, the smallest metal nanoparticles (MNPs), which account for more than 99.9% of the total MNPs number and for more than 95% of the metal surface, are formed by practically pure palladium. The relative number of bimetallic alloyed nanoparticles is very small (less than 4 × 102 ppm) and they contribute to only about 2% of the total metal surface. In a second gold-enriched catalyst (P50) with an overall molar Pd/Au of 1.84, the proportion of the bimetallic alloyed nanoparticles increased to about 97% and they account for about 99% of the metal surface. As a result of the metal intermixing, the catalytic productivity for the DS reaction increased from 97 to 109 mmolH2O2/molH2, owing to the gold-promotion of palladium.

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