Transient responses of sap flow to step changes in wind speed were experimentally investigated in a wind tunnel. A Granier-type sap flow sensor was calibrated and tested in a cylindrical tube for analysis of its transient time response. Then the sensor was used to measure the transient response of a well-watered Pachira macrocarpa plant to wind speed variations. The transient response of sap fl...

Daily rates of whole tree water use were measured in a homogeneous 7-year-old plantation over 84 days. Two trees were selected in the two most contrasting ends, i.e., with mean water table at -1.5 m and -3.5 m. Results showed that the mean tree water use was close to 80 dm day with a small mean difference between the two sites (5.4 dm day, about 7%). Higher daily variations were observed on a s...

We investigated the assumption, necessary for comparison between bottom-up scaling of plot level fluxes to top-down scaling of regional models, that small plots of sap flux are representative of the transpiration component of regional land-surface atmosphere water vapor interactions. We conducted sap flux measurements in three stands dominated by sugar maple (Acer saccharum Marsh.) representing...

At the leaf scale, it is a long-held assumption that stomata close at night in the absence of light, causing transpiration to decrease to zero. Energy balance models and evapotranspiration equations often rely on net radiation as an upper bound, and some models reduce evapotranspiration to zero at night when there is no solar radiation. Emerging research is showing, however, that transpiration ...

In this paper we study the possibility to use artificial neural networks for trees classification based on real and approximated values of sap flow density flux describing water transport in trees. The data sets were generated by means a new tree monitoring system TreeTalker. Fourier series-based model is used fitting with periodic patterns. multivariate regression defines functional dependenci...

objective(s): the aim of this study was to synthesize triangular gold nanoparticles, and then to evaluate their capability for inhibition of candida albicans secreted aspartyl proteinase 2(sap2).materials and methods: to synthesize the nanoparticles, hydrogen tetrachloroaurate and hexadecyl trimethyl ammonium bromide were incubated in presence of sn(iv) meso-tetra(n-methyl-4-pyridyl) porphine t...