6 documents found, page 1 of 1
Poly(β-cyclodextrin)-Activated Carbon Gel Composites for Removal of Pesticides ...
Utzeri, Gianluca; Veríssimo, Luís; Murtinho, Dina; Pais, Alberto; Perrin, F. Xavier; Ziarelli, Fabio; Iordache, Tanta-Verona; Sarbu, AndreiPesticides are widely used in agriculture to increase and protect crop production. A substantial percentage of the active substances applied is retained in the soil or flows into water courses, constituting a very relevant environmental problem. There are several methods for the removal of pesticides from soils and water; however, their efficiency is still a challenge. An alternative to current methods relies o...
Poly(β-cyclodextrin)-Activated Carbon Gel Composites for Removal of Pesticides ...
Utzeri, Gianluca; Veríssimo, Luís; Murtinho, Dina; Pais, Alberto; Perrin, F. Xavier; Ziarelli, Fabio; Iordache, Tanta-Verona; Sarbu, AndreiPesticides are widely used in agriculture to increase and protect crop production. A substantial percentage of the active substances applied is retained in the soil or flows into water courses, constituting a very relevant environmental problem. There are several methods for the removal of pesticides from soils and water; however, their efficiency is still a challenge. An alternative to current methods relies o...
Biodiversity conservation: history, protected areas and hotspots
Huntley, B.J.; Beja, Pedro; Pinto, Pedro Vaz; Russo, Vladimir; Veríssimo, Luís; Morais, MiguelAngola is a large country of great physiographic, climatic and habitat diversity, with a corresponding richness in animal and plant species. Legally protected areas (National Parks and Game Reserves) were established from the 1930s and occupied 6% of the country’s terrestrial area at the time of independence in 1975. As a consequence of an extended war, the Protected Areas were exposed to serious neglect, poach...
The mammals of Angola
Beja, Pedro; Pinto, Pedro Vaz; Veríssimo, Luís; Bersacola, Elena; Fabiano, Ezequiel; Palmeirim, Jorge M.; Monadjem, Ara; Monterroso, PedroScientific investigations on the mammals of Angola started over 150 years ago, but information remains scarce and scattered, with only one recent published account. Here we provide a synthesis of the mammals of Angola based on a thorough survey of primary and grey literature, as well as recent unpublished records. We present a short history of mammal research, and provide brief information on each species known...
Characterization at 25 °C of sodium hyaluronate in aqueous solutions obtained b...
Mráček, Aleš; Gřundělová, Lenka; Minařík, Antonín; Veríssimo, Luís; Barros, Marisa C. F.; Ribeiro, Ana C. F.Mutual diffusion coefficients, D, were determined for aqueous solutions of sodium hyaluronate (NaHy) at 25 °C and concentrations ranging from 0.00 to 1.00 g·dm(-3) using the Taylor dispersion technique. From these experimental data, it was possible to estimate some parameters, such as the hydrodynamic radius Rh, and the diffusion coefficient at infinitesimal concentration, D0, of hyaluronate ion, permitting us ...
Binary Diffusion Coefficients for Aqueous Solutions of Lactic Acid
Ribeiro, Ana; Lobo, Victor; Leaist, Derek; Natividade, Joaquim; Veríssimo, Luís; Barros, Marisa; Cabral, AnaTaylor dispersion equipment installed at the University of Coimbra for the measurement of diffusion in liquids has been tested to ensure adequate accuracy and precision by measuring mutual diffusion coefficients for binary aqueous solutions of sucrose, glycine, lithium chloride, potassium chloride, and hydrochloric acid at 298.15 K. In addition, binary mutual diffusion coefficients for aqueous solutions of lact...