Results 11 to 20 of about 4,194,275 (243)

Quasitriangular Hopf algebras whose group-like elements form an abelian group [PDF]

open access: yesProceedings of the American Mathematical Society, 1996
The author is interested in the basic structure of quasitriangular Hopf algebras, and asks: if \((A,R)\) is a quasitriangular pointed indecomposable Hopf algebra, do its group-like elements form a finite abelian group? This is clearly true for the special case of a cocommutative pointed irreducible Hopf algebra, since then \(G(A)\) is trivial; in the ...
openaire   +1 more source

Study of VIPER and TATE in kinetoplastids and the evolution of tyrosine recombinase retrotransposons

open access: yesMobile DNA, 2019
Background Kinetoplastids are a flagellated group of protists, including some parasites, such as Trypanosoma and Leishmania species, that can cause diseases in humans and other animals.
Yasmin Carla Ribeiro   +6 more
doaj   +1 more source

Soft Sets with Atoms

open access: yesMathematics, 2022
The theory of finitely supported structures is used for dealing with very large sets having a certain degree of symmetry. This framework generalizes the classical set theory of Zermelo-Fraenkel by allowing infinitely many basic elements with no internal ...
Andrei Alexandru, Gabriel Ciobanu
doaj   +1 more source

Evolution of Regulated Transcription

open access: yesCells, 2020
The genomes of all organisms abound with various cis-regulatory elements, which control gene activity. Transcriptional enhancers are a key group of such elements in eukaryotes and are DNA regions that form physical contacts with gene promoters and ...
Oleg V. Bylino   +2 more
doaj   +1 more source

3D LANDSCAPE OBJECTS FOR BUILDING INFORMATION MODELS (BIM) [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019
Building Information Modeling (BIM) is a method for the digital collaborative design, construction and operation of buildings. However, in order to realize a complete view on needed work and expenses of a building, the surrounding landscape elements must
M. Fritsch, C. Clemen, R. Kaden
doaj   +1 more source

A periodic-like table of space groups

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2023
There are about 100 chemical elements, and 200 space groups, rounding to the nearest hundreds. The elements, by virtue of the iconic periodic table, which hangs in schoolrooms worldwide, are part of our common culture.
Bart Kahr
doaj   +1 more source

DIRS1-like retrotransposons are widely distributed among Decapoda and are particularly present in hydrothermal vent organisms

open access: yesBMC Evolutionary Biology, 2009
Background Transposable elements are major constituents of eukaryote genomes and have a great impact on genome structure and stability. Considering their mutational abilities, TEs can contribute to the genetic diversity and evolution of organisms ...
Bonnivard Eric, Piednoël Mathieu
doaj   +1 more source

Characterization of an endogenous retrovirus class in elephants and their relatives

open access: yesBMC Evolutionary Biology, 2004
Background Endogenous retrovirus-like elements (ERV-Ls, primed with tRNA leucine) are a diverse group of reiterated sequences related to foamy viruses and widely distributed among mammals. As shown in previous investigations, in many primates and rodents
Englbrecht Claudia C   +2 more
doaj   +1 more source

Detailed Abundances of 15 Stars in the Metal-Poor Globular Cluster NGC 4833 [PDF]

open access: yes, 2015
We have observed 15 red giant stars in the relatively massive, metal-poor globular cluster NGC 4833 using the Magellan Inamori Kyocera Echelle spectrograph at Magellan.
Roederer, Ian U., Thompson, Ian B.
core   +1 more source

Mycoplasma- or PLT Group-like Microorganisms Found in the Phloem Elements of Plants Infected with Mulberry Dwarf, Potato Witches' Broom, Aster Yellows, or Paulownia Witches' Broom

open access: yesJapanese Journal of Phytopathology, 1967
Repeated electron microscopic examinations of thin sections of young leaves and shoots from mulberry tree infected naturally or artificially with dwarf disease, have failed to show any such uniform particles, spherical or elongated, as have been described for plant viruses in the past.
Yoji DOI   +3 more
openaire   +2 more sources

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