Previous analysis of actin in a dicotyledonous plant, Phaseolus vulgaris (or common bean), showed very low actin levels in cotyledons but they were concentrated in the embryo axis. Upon imbibition, actin expression increased 5-fold and a maximum of four actin isoforms were observed, two of them transient and two major ones were steadily expressed. In this work, analysis of the actin expression ...

We propose a method that allows probing quantitatively the individual saturations of crudeoil/brine/mud-filtrate mixtures during imbibition-drainage experiments on a petroleum rock-system. The experiments have been also performed at different temperature and pressure conditions.

development of pore network models for real porous media requires a detailed understanding of physical processes occurring on the microscopic scale and a complete description of porous media morphology. in this study, the microstructure of porous media has been represented by three dimensional networks of interconnected pores and throats which are designed by an object oriented approach. afterw...

The fracture-controlled matrix unit is commonly found in low-permeability fractured reservoirs. Due to the permeability difference between fracture system and system, a large amount of oil will remain during traditional water injection development, thus limiting reservoir productivity. However, special imbibition mode provides breakthrough for secondary recovery. In this paper, based on model s...

Countercurrent membrane supported reactive extraction (MSRE) was studied for removal of carboxylic acids from aqueous streams with a PTFE capillary membrane. Analysis the mass transfer rates performed to support modeling process. Total coefficients ranging 2.0·10-7 4.0·10-7 m/s were obtained when extracting lactic acid 20 wt% tri-N-octyl amine in 1-decanol thicknesses 260 µm and 80 µm. The limi...

drought resistance is a very important characteristic needed for plant survival especially at germination stage, in arid and semi-arid lands. phosphatase enzymes are widely found in plants. these enzymes are responsible for dephosphorylation of organic phosphate and altering it to mineral phosphate. germination experiments were conducted in two bread wheat cultivars (sardari and alvand) under s...

We have studied spontaneous imbibition fronts generated by capillary rise between two roughened glass plates, the separation d of which varied between 10 and 50 microm. Perfect agreement with Washburn's law was obtained. We have determined the roughness exponent chi of the fronts, and found chi=0.81+/-0.01 for small length scales. Above a certain crossover length xi, it reached chi=0.58+/-0.04,...

When surface wetting drives liquids to invade porous media or microstructured materials with uniform channels, the penetration distance is known to increase as the square root of time. We demonstrate, experimentally and theoretically, that shape variations of the channel, in the flow direction, modify this ‘diffusive’ response. At short times, the shape variations are not significant and the im...