Vascular epiphytes were traditionally studied in pristine forests, and few studies were performed to understand their colonization in secondary forests, particularly in subtropical areas. Many secondary forests are invaded ...

In this paper we obtain a classification of compact n-submanifolds of the Euclidean space Rn+2 with 2-nonnegative curvature operator.

This paper takes the experiences and opinions of Costa Rican teachers and students about sexual diversity as a source of analysis. With the aim of decoding these discourses, queer pedagogy is understood as a theoretical ...

Hebanthe eriantha (Poir.) Pedersen, a climbing species of the Amaranthaceae increases in stem thickness by forming successive cambia. The family is dominated by herbaceous species and is constantly under discussion due to ...

There is strong evidence that expansion of university enrolment contributes to economic growth. Less clear, however, is whether that expansion will reduce income inequality. Human capital theory argues that education ...

The bark of Styrax camporum Pohl (Styracaceae) differs anatomically in the root and stem. Roots have layered secondary phloem; short sieve tubes with simple, transverse or more or less inclined sieve plates; fibres in ...