This study aimed to explore the effectiveness potential of Eichhornia crassipes, Pistia stratiotes and Salvinia molesta for reduction potentially toxic metals from effluents enriched with Cd, Cr Pb. Based on a 21-day laboratory-scale experiment, total three concentrations at 1, 5 10 mg/L were selected culture each macrophytes. In addition, kinetics prediction models used analyze metal data unde...

We study the expected number of real zeros for random linear combinations of orthogonal polynomials. It is well known that Kac polynomials, spanned by monomials with i.i.d. Gaussian coefficients, have only (2/π + o(1)) logn expected real zeros in terms of the degree n. On the other hand, if the basis is given by Legendre (or more generally by Jacobi) polynomials, then random linear combinations...

"Reid's paradox" is the mismatch between theoretical estimates of invasion rates for plants and "observed" rates of plant migration, particularly in the Holocene postglacial migration northwards. While Reid couched his paradox in terms of the migration of oaks in Great Britain, observers have documented the same problem in a wide variety of species. In almost all cases, these authors suggest th...

The main problem of upland rice cultivation is the presence weeds, which cause a decrease in quantity and quality crop yields. Generally, farmers use synthetic herbicides to control weeds. One way reduce by using kiambang extract bioherbicides are applied Currently, there no research determine effect on germination. purpose this study was assess bioherbicide germination phase giving several con...