In this paper we show that certain three-dimensional isometry algebras, specifically those of type I, II, III and V (according to Bianchi's classification), can be obtained as expansions of the isometries in two dimensions. ...

We extend a previous study of a predator-prey model with strong Allee effect on the prey in which the functional response is a function of the ratio of prey to predator. We prove that the solutions are always bounded and ...

A universal description of the effects of additive noise on super- and subcritical spatial bifurcations in one-dimensional systems is theoretically, numerically, and experimentally studied. The probability density of the ...

The objective of this study was to evaluate the production of hydrogen in a two-stage CSTR system - both reactors having the same volume - and compare its performance with a conventional one-stage process. The lab-scale ...

Biochemical analyses of the Hormoconis resinae fungal mycelium would explain behaviour differences of corrosive and non-corrosive strains on Al and its aeronautical alloys. In previous works its aggressiveness had been ...

Wild (Th11, Th12 and Th650) and mutant (Th11A80.1, Th12A40.1, Th12C40.1 and Th650-NG7) Trichoderma harzianum strains were stored for 180 days at 5°C or at 22°C, in two types of soils. Strains recovered at 90, 120 and 180 ...

Oenothera picensis plants (Fragrant Evening Primrose) grow in the acid soils contaminated by copper smelting in the coastal region of central Chile. We evaluated the effects of the biodegradable chelate MGDA (methylglycinediacetic ...

This study builds a long-term bioeconomic model for multi-generational tilapia farming in the coastal region of Ecuador, where associative semi-intensive tilapia culture projects have been implemented. Survival, weight and ...

Piscirickettsia salmonis is a bacterial fish pathogen seriously threatening the sustainability of the Chilean salmon industry. The biology and life cycle of this bacterium is not completely understood and there are no ...