Los ministros de Agricultura y de Ciencia, Tecnología e Innovación –Luis Basterra y Roberto Salvarezza, respectivamente– junto con la presidenta del INTA –Susana Mirassou– presentaron el desarrollo científico. Se trata de nanoanticuerpos VHH derivados de llama y anticuerpos aviares IgY con la capacidad de neutralizar el SARS-CoV-2 que causa la enfermedad de coronavirus-2.
Trabajos en Prensa
Mechanical properties of poplar wood from forest windbreaks from Río Negro, Patagonia, Argentina
In Río Negro province, Argentina, there are currently 6000 km of linear length of poplar windbreaks. Its main function is the protection of fruit and vegetable crops but they are also a real and potential forest resource. The objective of this work is to know the mechanical properties of the wood these poplars, nonexistent and essential information to optimize their use and maximize their value in different uses. Fifteen specimens of the most represented poplars in forest curtains (chileno, conti 12 and boleana) of farms in Allen were cutted. From each tree a 1.5 m long log was extracted to obtain wood for mechanical properties tests of static resistance of bending, compression (ASTM D-143), dowel bearing strenght (ASTM D-5764-97) and hardness (IRAM-9570). The results obtained were of the order of those reported for wood from other poplars grown in different areas of our country, some of them accepted for structural use. On the other hand, the values obtained were from the range of those reported for ponderosa pine, wood widely used in Patagonia in the construction, load-bearing structures (beams, columns, etc.) and frames of trusses in structural panels. The wood of boleana and conti 12 presented higher values of resistance to flexion, compression and hardness than chilean poplar (MOR flexion: 66.7 Mpa, MOE flexion: 8562.15 Mpa, MOR compression: 31.22 Mpa, MOE compression: 8270.52 MPa, radial hardness: 1.63 kN / cm2). The dowel bearing strenght did not show significant variations among them (conti 12: 29.42 MPa, boleana: 30.08 MPa and chilean: 29.65 MPa). These conclusions highlight the potential of poplar wood from Río Negro forest windbreaks to expand their possibilities of use.
Keywords: wood technology, forest curtains, poplar cultivation.
1 Universidad Nacional del Comahue, Asentamiento Universitario San Martín de los Andes, Pasaje de la Paz 235, (8370), San Martín de los Andes, Neuquén, Argentina. Correo electrónico: email@example.com
2 Universidad Nacional del Comahue, Facultad de Ingeniería, Departamento de Mecánica Aplicada, Grupo de Estudio de Polímeros Sintéticos y Naturales (GEPSyN), Buenos Aires 1400 (8300) Neuquén.