A mathematical model was developed to simulate the deep-bed convective drying of Algerian wheat and barley using the characteristics of the selected local varieties. The nonequilibrium model, composed of a system of partial differential equations (PDEs), was solved using temporal and spatial discretization with some simplifying assumptions. The simulated results were compared with experimental data obtained during drying of wheat in deep beds (1-, 5-, and 10-cm depths) in a laboratory dryer under the experimental conditions of 60°C temperature, 10% RH, 0.7 m/s air velocity, and initial grain moisture content of 25.0% (db). The simulation results obtained by the mathematical model were in good agreement with those obtained by experiments carried out on the Algerian wheat.
Study of meiosis in a clone of S. spontaneum (2n = 54), revealed that 11.39 ± 2.52% of PMCs undergo cytomixis during premetaphase I. Only 18 bivalents migrated with the nucleolus into the recipient cell and 9 remained in the donor cell, which was taken to indicate the existence of a basic number of 9, in addition to previously reported basic numbers of 6, 8 and 10.
N-Phenylcinnarnohydroxamic acid (PCHA) reacts with iron(III) and vanadium(V) in the presence of thiocyanate to form water-insoluble orange and green complexes, respectively. The iron(III)-PCHA and vanadium(V)-PCHA-thiocyanate complexes can be quantitatively extracted into toluene and other common organic solvents at pH 1.5–2.0. The absorption spectra and composition of both complexes are described. The effects of foreign ions and of experimental variables on the extraction and determination of the two metal ions are studied. A simple, selective method is described for the simultaneous determination of iron(III) and vanadium(V) by extraction-spectrophotometry; absorbances are measured at 440 and 580 nm. Mixtures can be determined over the range 10−4–10−5 M in each metal. The method was applied successfully to the analysis of standard steels for iron and vanadium.