studying the ecology of halophyte plant species provides useful information for reclamation and managements of arid and semiarid rangelands. this research was implemented as a pot experiment in which seeds of three rangeland species (erotiaceratoides, agropyrndesertorum, and salsolaarbusculiformis) were sown in the soil taken from understory of salsola or from the open spaces. soil samples were...

We investigated one causal explanation for geographic variation in clutch size and aggregative feeding of the pipevine swallowtail, Battus philenor. Populations in California lay larger clutches than those in Texas, and larger feeding aggregations grow at an accelerated rate on the California host plant. Using reciprocal transplant experiments with larvae from California and Texas populations, ...

A new species, Popowia bachmaensis Ngoc, Tagane & Yahara, sp. nov. is described from Bach Ma National Park in Thua Thien Hue Province, Central Vietnam. This species is morphologically similar to Popowia pisocarpa (Blume) Endl. ex Walp., but can be readily distinguished from it by its lower stems, smaller leaves, shorter flowering pedicels, shorter carpels, longer sepals and inner petals. A deta...

In the early 1990s after the collapse of the USSR, the new Russian state faced strong nationalist claims for sovereignty and increased autonomy from the side of regional elites. These nationalist challenges at the sub-national level were seriously considered by many experts to be a potential cause for the further breakup of Russia into a number of new independent states. The nationalist movemen...

We investigate the exclusive electroproduction of π mesons from nucleons. To leading twist, leading order αs accuracy the corresponding production amplitude can be decomposed into pseudovector and pseudoscalar parts. Both can be expressed in terms of quark double distribution functions of the nucleon. While the pseudovector contribution is connected to ordinary polarized quark distributions, th...