Abstract The developed system allows to measure the thermal conductivity of solid materials used as insulators in building bioclimatic houses on high Andean zones. A unidirectional heat flow model through a sample dimensions 4.0 cm x 4.2 1.35 has been considered. K-type thermocouples were temperature’s gradient. obtained values were: 0.97 Wm −1 °C for glass, 0.38 ignimbrite, 0.58 roof brick and...

Parodiolyra is a member of Olyreae, a tribe of herbaceous bamboo species within the Poaceae. The genus has five species, four of which were previously regarded as belonging to Olyra L. Parodiolyra has a Neotropical distribution and only two species occur on forests in Eastern Brazil: P. micrantha (Kunth) Zuloaga & Davidse and P. ramosissima (Trin.) Soderstr. & Zuloaga, the first widely distribu...

Pion elastic, charge exchange scattering and induced eta production on the trin-ucleon systems are investigated in a coupled-channels approach in momentum space with Fadeev wave functions. The channel πN → ηN is included using an isobar model with S-, P-, and D-wave resonances. While the coherent reactions like 3 He(π, π) 3 He can be reasonably well reproduced up to T π =500 MeV, large discrepa...

Anther and pollen development were studied in Olyra humilis Nees, Sucrea monophylla Soderstr, (Bambusoideae), Axonopus aureus P. Beauv., Paspalum polyphyllum Nees ex Trin. (Panicoideae), Eragrostis solida Nees, and Chloris elata Desv. (Chloridoideae). The objective of this study was to characterise, embryologically, these species of subfamilies which are considered basal, intermediate and deriv...

Stagonospora sp. (4/99-1) is a beneficial endophytic fungus frequently transmitted by seeds of Phragmites australis [Cav.] Trin. ex Steudel. Here we show that this fungus also penetrates the root epidermis. At first, hyphae were attracted by the root and proliferated on the root surface, preferably over the anticlinal walls. Penetration occurred directly by undifferentiated hyphae or was facili...

background and objectives: achillea is an ancient medicinal herb. the genus comprises about 100 species which are mostly distributed in northern hemisphere and some have been investigated for different biological activities. there are also several reports in iranian traditional medicine (itm) texts about its anti-tumor effect. the cytotoxic activity of the methanol extract of achillea vermicula...

Native grasses interact spatially with themselves and their environment and can therefore be thought of as a system of dependent random variables. One method of modeling the spatial dependence of a multi-species population is a Gibbsian pairwise potential model. Since natural selection operates at the level of individual plants, the information obtained from such a model should provide a greate...