‎in this paper we introduce the concept of order difference interval graph $gamma_{odi}(g)$ of a group $g$‎. ‎it is a graph $gamma_{odi}(g)$ with $v(gamma_{odi}(g)) = g$ and two vertices $a$ and $b$ are adjacent in $gamma_{odi}(g)$ if and only if $o(b)-o(a) in [o(a)‎, ‎o(b)]$‎. ‎without loss of generality‎, ‎we assume that $o(a) leq o(b)$‎. ‎in this paper we obtain several properties of $gamma_...

Species turnover and temporal variation of forest insects were used to explain the ecological succession and ecological segregation between efficiently competing species. In this study, species richness, abundance, and beta-diversity of the genus Onthophagus (Coleoptera: Scarabaeidae) assemblages between 2003 and 2007 were described and the diel-flight activity was examined in the disturbed for...

A total o f 28 strains o f several species o f Rhizobium were screened for the presence and regulation of the enzyme alkaline phosphatase. In contrast to all other species o f Rhizobium, the activity of this enzyme was absent in R. trifolii. D ifferent levels o f alkaline phosphatase were observed in various species o f Rhizobium. Both, species as well as strain specific differences were found ...

The Neotropical Orasema festiva species group is revised, retaining O. festiva (Fabricius) and O. delicatula (Walker) as valid species, and describing four new species: O. alvarengai n. sp., O. caesariata n. sp., O. erwini n. sp., and O. reburra n. sp. The festiva-group is characterized by features that are unusual or unique in Orasema, including the presence of 8-11 labral digits, a smooth fac...

In the polymeric title compound, [Ba(NO3)2(C6H9N3O2)2] n , the Ba(II) atom is located on a crystallographic twofold axis and is coordinated by ten O atoms. Six are derived from two zwitterionic l-histidine mol-ecules that simultaneously chelate one Ba(II) atom and bridge to another. The remaining four O atoms are derived from two chelating nitrates. The mol-ecules assemble to form a chain along...

This second part of the revision of the Argentine species of Ora Clark, 1865 provides detailed redescriptions, habitus photos, illustrations of male and female genitalia for eight species, an identification key and updated distributions for all the species. A lectotype is hereby designated for Ora bruchi Pic, 1928. Scirtes brevenotatus v. mediolineatus Pic, 1928 and S. brevenotatus wagneri Pic,...