Barley slicing

Table 6.2 provides, as an example, the set of design equations for drying of sliced vegetables in a PFB dryer with relocated gas stream. Another set of equations for a spouted bed configuration obtained from experiments with wheat, barley, beet, onion, rapeseed, and carrot seeds is given in Table 6.3. Detailed information as well as relationships for other products such as sugar or pharmaceuticals can be found in a comprehensive paper by Gawrzynski and Glaser (1996).

The active transport of amino acids and their accumulation in vacuoles has been demonstrated with carrot slices 16, 17, 33). Active transport of amino acids has been shown for leaf strips of barley (2, 273, 308) and for leaf slices of barley 200). In the latter investigation competition experiments indicated a single carrier system for all amino acids. However, experiments on the uptake of amino acids into barley roots indicated different transport systems for lysine -i- arginine, proline, and methionine, respectively 310). 

Lien, R., and S. E. Rognes Uptake of amino acids by barley leaf slices kinetics, specificity, and energetics. Physiol. Plant. 41, 175 (1977). 

In recent years a number of in vitro experiments have been reported on a variety of plant materials—segments of oat coleoptiles, segments of barley root, cut-up spinach leaves, discs of rhubarb leaves, slices of potato tubers —which demonstrate the utilization of di-and tricarboxylic acids by respiring cells and an increased rate of oxidation on addition of these substances they demonstrate further that malonate inhibits plant respiration. The stimulating effect of the substrates is often absent in fresh material, which is saturated with oxidizable substrates, but it is marked after storage, which depletes the tissue of substrates. The malonate inhibition is usually found only when the medium is acid (pH 5 or below) and when the concentration of malonate is relatively high (0.01 M and above). To obtain the same effects as in animal tissues ten- to a hundredfold concentrations of malonate are required. 

Discussion. Labeling experiments in which a number of C labeled acids were administrated to barley organ slices gave B-diketones containing the isotopic marker. Diketones were isolated and degradated by basic hydrolysis to fatty acids whose radioactivity was measured. Some data most pertinent to our discussion are reported in the Table. 

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