Results 11 to 20 of about 7,874,791 (304)

Robertsonian Fusion and Centromere Repositioning Contributed to the Formation of Satellite-free Centromeres During the Evolution of Zebras

Molecular biology and evolution, 2022
Centromeres are epigenetically specified by the histone H3 variant CENP-A and typically associated with highly repetitive satellite DNA. We previously discovered natural satellite-free neocentromeres in Equus caballus and Equus asinus. Here, through ChIP-
Eleonora Cappelletti, Francesca M. Piras, Lorenzo Sola, Marco Santagostino, Wasma A Abdelgadir, E. Raimondi, Francesco Lescai, S. Nergadze, E. Giulotto   +8 more
semanticscholar   +2 more sources

Birth, evolution, and transmission of satellite-free mammalian centromeric domains [PDF]

Genome Research, 2018
Mammalian centromeres are associated with highly repetitive DNA (satellite DNA), which has so far hindered molecular analysis of this chromatin domain. Centromeres are epigenetically specified, and binding of the CENPA protein is their main determinant ...
S. Nergadze, Francesca M. Piras, Riccardo Gamba, Marco Corbo, F. Cerutti, J. McCarter, Eleonora Cappelletti, Francesco Gozzo, R. Harman, D. Antczak, Donald C. Miller, M. Scharfe, G. Pavesi, E. Raimondi, K. Sullivan, E. Giulotto   +15 more
semanticscholar   +2 more sources

Evolution of the Orbital Elements for Geosynchronous Orbit of Communications Satellite, II [PDF]

Journal of Astronomy and Space Sciences, 1987
For a geostationary satellite north-south station keeping maneuver must control the inclination elements. The effects on the orbit plane of maneuvers and natural perturbations may be represented by a plane plot of Wc versus Ws, since these inclination ...
Kyu-Hong Choi, Jae-Woo Park, Kyung-Mee Kim   +2 more
doaj   +1 more source

U. S. Air Force Satellite Control Network Evolution

, 1986
International Telemetering Conference Proceedings / October 13-16, 1986 / Riviera Hotel, Las Vegas, NevadaThis paper traces the evolution of the Air Force Satellite Control Network (AFSCN) from its inception twenty-seven years ago to the present, and ...
Walker, Donald
core   +5 more sources

Landsat Satellite Image-Derived Area Evolution and the Driving Factors Affecting Hulun Lake from 1986 to 2020

Remote Sensing, 2023
The area fluctuation of lakes directly affects the stability of the surrounding ecological environment. Research on the area evolution of lakes and the driving factors affecting it plays an important role in sustainable water resource management. In this
Wei Song, A. Yinglan, Yun-Tao Wang, Bao-Lin Xue   +3 more
semanticscholar   +1 more source

Sesquinary Catastrophe for Close-in Moons with Dynamically Excited Orbits

The Astrophysical Journal, 2023
We identify a new mechanism that can lead to the destruction of small, close-in planetary satellites. If a small moon close to the planet has a sizable eccentricity and inclination, its ejecta that escape to the planetocentric orbit would often reimpact ...
Matija Ćuk, Douglas P. Hamilton, David A. Minton, Sarah T. Stewart   +3 more
doaj   +1 more source

Evolution of Virulence in Natural Populations of the Satellite RNA of Cucumber mosaic virus [PDF]

Phytopathology®, 2000
From 1986 to 1992, an epidemic of tomato necrosis caused by Cucumber mosaic virus (CMV) plus CMV satellite RNAs (satRNAs) occurred in eastern Spain. From 1989 onward, the frequency of tomato necrosis di-minshed, and it almost completely disappeared after 1991. Analyses of plants infected with CMV and with CMV satRNA and of the phenotype (necrogenic or
F, Escriu, A, Fraile, F, García-Arenal
openaire   +2 more sources

Annual Variation of Global Air Pollution: Initial Aerosol Effect or Climate Interaction?

Frontiers in Environmental Science, 2021
The aerosol at the previous time (initial aerosol) and climate conditions control the next step annual variation of global air pollution through the complex aerosol-climate interaction.
Huihui Feng, Huihui Feng, Ying Ding, Bin Zou, Bin Zou, Chuanfeng Zhao   +5 more
doaj   +1 more source

Temporal Evolution of Land Use Patterns in Tamil Nadu: A Satellite-Based Analysis

Geo eye, 2023
To study the dynamics of different land cover categories and their implications, this paper compares Land Use Land Cover (LULC) data for the state of Tamil Nadu over the years 2005–2006, 2011–2012, and 2015–2016. The study reveals important trends in the
S. Sushmitha, B. Chandrashekara
semanticscholar   +1 more source

Genetic variability and evolution of the satellite RNA of cucumber mosaic virus during natural epidemics [PDF]

Journal of Virology, 1993
The genetic structure of populations of cucumber mosaic virus (CMV) satellite RNA (satRNA) and its evolution were analyzed during the course of a CMV epidemic in tomatoes in eastern Spain. A total of 62 variants of CMV-satRNA from epidemic episodes in 1989, 1990, and 1991 were characterized by RNase protection assay (RPA); RPA patterns defined 60 ...
M A, Aranda, A, Fraile, F, Garcia-Arenal
openaire   +2 more sources