Retting of fibrous plants such as flax is an essential step in the extraction fibre bundles and their transformation into textiles reinforcement fabrics for use garments composites. Dew-retting traditionally performed from Northwest France to Netherlands, climate highly favourable this process. Hemp a plant that can be grown almost all over Europe with low environmental impact. A retting also r...

We developed a novel dew-point control system [advanced (ADCS)] in primary standard humidity generator based on the two-pressure technique. In ADCS, actual vapor–liquid equilibrium temperature of water was estimated for control, and pressure inside main saturator controlled by adjusting variable opening an expansion valve. Using periodic variation (oscillation) dew point observed low range grea...

Dew formation was investigated in three developmental stages of biological soil crusts (BSC), which were collected along a catena of an inland dune and in the initial substrate. The Penman equation, which was developed for saturated surfaces, was modified for unsaturated surfaces and used for prediction of dewfall rates. The levels of surface saturation required for this approach were predicted...

OBJECTIVES Use of a positron emission tomography (PET)/single-photon emission computed tomography (SPECT) system facilitates the simultaneous acquisition of images with fluorine-18 fluorodeoxyglucose ((18)F-FDG) and technetium ((99m)Tc)-tetrofosmin. However, (18)F has a short half-life, and 511 keV Compton-scattered photons are detected in the (99m)Tc energy window. Therefore, in this study, we...

an essential requirement for an operating pem fuel cell is providing proper water content in the membrane. to avoid water flooding an appropriate water balance is required. here, an analytic model of a planar membrane humidifier for pem fuel cell is proposed where the effect of dimensional parameters includes membrane thickness, membrane area and channel hydraulic diameter are investigated. a n...