The classification of Eriosyce subgenus Neoporteria ("subsection" in the sense of Kattermann) and the role of allopatry/sympatry in the diversification of the group were studied by use of cladistic and predictive distribution ...

Zeta-regularized products Πmam are known not to commute with finite products, so one studies the discrepancy Fn given by exp(Fn) := {equation presented}. For a rather general class of products, associated to polynomials ...

Reactivity prediction in the series of MPR 3 + fragments (M=Au, Ag, Cu; R=-H, -Me, -Ph) has been achieved at the ab initio (HF and MP2) and density functional theory (B3LYP and PBE) levels. We have used global and local ...

Theory predicts that in more stressful environments, positive plant-plant interactions should be more important than negative ones. For instance, in arid and semiarid regions, amelioration of soil drought produced by the ...

The toppling of young trees considerably reduces the value of the first log in Pinus radiata plantations. Although wind is the main cause of toppling, the quality and type of plants, planting techniques, soil fertility and ...

Carrot is an important nutritional crop due to the high levels of pro-vitamin A carotenoids (β-carotene and, to a lower extent, α-carotene) that accumulate in its storage root during secondary growth. In this work we show ...

Semidalis kolbei occupies a significant area of south central Chile. However, it is necessary to determine and predict the occurrence of the insect at a given site. The aim of this research is to analyze the potential ...

In this paper, a new type of mathematical model to represent certain processes with impulsive dynamic behavior is introduced. The main assumption is that the next impulse time is determined by three fundamental elements: ...

This work reports a systematic study of the structural and electrical behavior of three ternary phases of the Ta xMo 1-xS 2 system (x = 0.55, 0.75 and 0.90) and their intercalation compounds resulting from both chemical ...

Phenotypic flexibility in metabolic rates allows organisms to reversibly adjust their energy flow to meet challenges imposed by a variable environment. In turn, the food habits hypothesis (FHH) predicts that species or ...