The sand termite Psammotermes allocerus is widely distributed in southern Africa. To investigate the genetic diversity of this species 113 samples were collected arid regions South Africa, Namibia and Angola fairy circles also landscapes without circles. mitochondrial markers COI COII selected to perform Bayesian Inference analysis. phylogenetic tree composed eight well-supported groups within ...

Two A2B cobalt triaryl corroles bearing ester (1) or carboxylic acid group (2) at the 10-para-phenyl were prepared and used as homogeneous electrocatalysts for hydrogen evolution reaction (HER) with acetic water proton sources. CV results revealed HER underwent two routes [CoIII–H]– (EECC pathway) [CoII–H]2– (ECEC intermediates low concentration. While mainly went through ECEC route high The tu...

in this paper, the photochemical degradation of azure-b by cu2+/s2o82− process has beenpresented. cu2+ as photocatalyst and s2o82− ion as photooxidant used in this process. atextremely low concentrations, cupric ion showed true catalytic activity in the overall process.the influence of various parameters on the performance of the treatment process has beenconsidered, such as ph, concentration o...

Decomposition of transition-metal amidinates [M{MeC(NiPr)2} n ] [M(AMD) n ; M=MnII, FeII, CoII, NiII, n=2; CuI, n=1) induced by microwave heating in the ionic liquids (ILs) 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIm][BF4]), 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIm][PF6]), 1-butyl-3-methylimidazolium trifluoromethanesulfonate (triflate) ([BMIm][TfO]), and 1-butyl-3-methyl...

a new, simple, rapid, and cheap method for determination of trace amounts of nitrite ion is reported.determination is based on reduction of bromate ion by nitrite ion, in the presence of murexide inacidic media. during reaction of bromate ion with nitrite ion, the reaction mixture is decolorized.the absorbance changes is then monitored spectrophotometricaly at 520 nm, at 25 °c. dynamicrange of ...

After more than one hundred years, a new drywood termite of the genus Proneotermes is described from the tropical dry forest in the Caribbean coast of Colombia. Morphological and genetic analyses are given for Proneotermes macondianussp. n. This termite occurs in tropical dry forests in small colonies inside thin branches of dry wood. The soldier of Proneotermes macondianus is smaller and the g...

The genus Dichaetophora Duda comprises 61 described species classified into four species groups: agbo, tenuicauda, acutissima and sinensis. This genus is distributed exclusively in the Old World, and is rich in species in the tropical and subtropical areas of the Oriental, Australasian, and Afrotropical regions. In this paper, a new species group, the trilobita group, is established for six new...

ion channels are naturally occurring pores through the proteins that regulate the passage of ions and thus maintain the concentration of ions inside and outside the cell. the ion channels control many physiological functions and they can show selectivity for a specific ion. ion channels are mostly observed in nerve cells and muscle cells. the influx of ions into cells can be regulated by a gate...