Many plants, including agronomically important species, exhibit post-zygotic barriers to
hybridisation, in both interploidy crosses within species and interspecific crosses between …

In the present work, effective radium content and both area (surface) and mass exhalation
rates in beach sand samples collected from eight sea costs locations (Red Sea and …

The notion of (m-power closed) group was introduced Kappe et. al. We say that a group G is
(m-power closed) if 𝑮𝒎={𝒈𝒎; 𝒈∈ 𝑮} with fixed integer m is a subgroup of G. In this paper we …

Radon has been recognized as one of the major contributor to the natural radiation and
health hazards in the human dwellings, working places and mining areas. Even lung cancer …

Building composites are a main source of radioactive radon gas. Determination of such a
gas and its descendants are usually performed by passive detection technique using 105 …