نتایج جستجو برای: dominant frequency
تعداد نتایج: 606846 فیلتر نتایج به سال:
We investigate the suggestion that the frequencies of the kilohertz and other QPOs in the emission from neutron stars in low-mass X-ray binaries are generated by geodesic motion of gas clumps around the star. First we assume, following previous work, that the dominant frequencies produced by such motions are the azimuthal frequency ν K , the apsidal precession frequency ν AP , and the first ove...
Purpose: Identifying targets for catheter ablation remains challenging in persistent atrial fibrillation (persAF). The dominant frequency (DF) of electrograms during (AF) is believed to primarily reflect local activation. Highest DF (HDF) might be responsible the initiation and perpetuation persAF. However, spatiotemporal behavior not fully understood. Some DFs persAF were shown lack stability,...
HEN Habrobracon eggs are X-rayed at metaphase I and subsequently fertiw l i z e d , the decreased hatchability is attributed to dominant lethal mutation, in the same sense in which the term is used when sperm are irradiated. This is justified by WHITING'S demonstration (1946, 1948, 1949, 1950, 1955) that cytoplasmic injury is not lethal a t the doses employed. In unfertilized eggs, which develo...
Dominance status and carcass availability affect the outcome of sperm competition in burying beetles
Intense intrasexual competition between males often results in the establishment of a dominance hierarchy, promoting differential access to females. Dominant males are expected to evolve more prudent sperm allocation strategies, whereas subordinate males are expected to counteract their mating disadvantage by increasing their sperm allocation. Burying beetles, insects that breed on small verteb...
Background and purpose: Sand flies are widespread in Iran and are vectors of leishmaniasis and pappatci fever in most parts of the country including Southern Khorasan Province. Faunistic and ecological studies of these flies are necessary in order to implement proper vector control programs. This research was conducted to determine the sand flies fauna in Southern Khorasan province. Materials ...
the morphological diversity of arbuscular mycorrhizal fungi (amf) at the anguran zn and pb mining region (zanjan province, iran) were studied along a transect from the mine to 4500 m away. within each plot, a composite sample of root and rhizospheric soil from a dominant indigenous plant was collected. the soil samples were analyzed for their physico-chemical characteristics. spores were extrac...
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