We investigate the strong stability preserving (SSP) property of two-step Runge– Kutta (TSRK) methods. We prove that all SSP TSRK methods belong to a particularly simple subclass of TSRK methods, in which stages from the previous step are not used. We derive simple order conditions for this subclass. Whereas explicit SSP Runge–Kutta methods have order at most four, we prove that explicit SSP TS...

Angiosperm stigmas have long been known to exhibit high levels of peroxidase activity when they are mature and most receptive to pollen but the biological function of stigma peroxidases is not known. A novel stigma-specific class III peroxidase gene, SSP (stigma-specific peroxidase) expressed exclusively in the stigmas of Senecio squalidus L. (Asteraceae) has recently been identified. Expressio...

In this study there are demonstrated for the first time in albanian literature palynomorphologic characteristics of two types plants (Centaurea epirota and Viola epirota), collected Zagoria valley, Gjirokastra region, Albania. To carry out study, light microscopy was used it concluded that pollen grains Centaurea were 3 colporate, isopolar, with radial symmetry. polar view, have a circular tria...

BACKGROUND Exploring the residence time of allelochemicals released by plants into different soils, episodic exposure of plants to allelochemicals, and the effects of allelochemicals in the field has the potential to improve our understanding of interactions among plants. METHODOLOGY/PRINCIPAL FINDINGS We conducted experiments in India and the USA to understand the dynamics of soil concentrat...

The notion of partial deduction known from logic programming is deened in the framework of Structural Synthesis of Programs (SSP). Partial deduction for computability statements in SSP is deened. Completeness and correctness of partial deduction in the framework of SSP are proven. Several tactics and stopping criteria are suggested.

The notion of partial deduction known from logic programming is deened in the framework of Structural Synthesis of Programs (SSP). Partial deduction for unconditional computability statements in SSP is deened. Completeness and correctness of partial deduction in the framework of SSP are proven. Several tactics and stopping criteria are suggested.

Structured sequence processing (SSP) refers to the neurocognitive mechanisms used to learn sequential patterns in the environment. SSP ability seems to be important for language (Conway, Bauernschmidt, Huang, & Pisoni, 2010); however, there are few neural studies showing an empirical connection between SSP and language. The purpose of this study was to investigate the association between SSP an...

The teosintes, the closest wild relatives of maize, are important resources for the study of maize genetics and evolution and for plant breeding. We genotyped 237 individual teosinte plants for 93 microsatellites. Phylogenetic relationships among species and subspecific taxa were largely consistent with prior analyses for other types of molecular markers. Plants of all species formed monophylet...