The concept of HNN-extensions of groups was introduced by Higman, Neumann and Neumann in 1949. HNN-extensions and amalgamated free products have played a crucial role in combinatorial group theory, especially for algorithmic ...

The effect of the pathogenic fungus, Beauveria bassiana, on the invasion and proliferation of the entomopathogenic nematode, Heterorhabditis indica, in larvae of the waxmoth, Galleria mellonella, was investigated. ...

In this paper we report the first karyotypic data on Nebo hierichonticus (Simon 1872) from the occupied Palestinian territories. The karyotype consists of 50 chromosomes which appear acrocentric except for pair 3, likely ...

The distribution of four species of amphibians (Bufotes variabilis, Pelophylax bedriagae, Hyla savignyi / H. felixarabica, and Pelobates syriacus) are given in the occupied Palestinian territories of the West Bank are ...

Our data showed that in the 1960s/1970s some 31 species of mammals and 78 species of birds were present in the area of the Bethlehem governorate, between Bethlehem and Deir Mar Saba. Comparison with observations done in ...