たばこの引張特性に及ぼす温,湿度(水分),着葉位置の影響に関する実験的研究

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For the purpose of quantitatively distinguishing the influences of temperature (t), humidity (h), leaf position in a tobacco stalk (p) and direction in a leaf, upon the tensile characteristics or equilibrium moisture content of tobacco (Y), statistical calculations were carried out with many data on typical varieties in Japan, that is, Flue-cured (v_1) and Domestic variety (v_2). And the following formula to estimate Y was analyzed (Table III). Y= C_0+C_1t+C_2h+C_3h^2+C_4p+C_5p^2 After that, the relation between tensile characteristics and equilibrium moisture content (w) was searched with the formula Y. The important results obtained were as follows: (1) Tensile strength (P_m) The P_m of v_1 was greater than that of v_2. The P_m of v_1 was decreased when the h(w) or t was increased, but the P_m of v_2 did not show any notable tendency with the h (w) or t. In every variety the P_m was decreased toward the lower position in a stalk (Fig. 3 and 4). (2) Elongation percentage (ε) The ε of v_1 was higher than that of v_2. In every variety the e was increased when the h (w) or t was increased, and toward the upper position in a stalk (Fig. 3 and 4). (3) Elastic modulus (E) and Elasticity per unit dry weight (E_G) The E of v_1 was smaller than that of v_2. In every variety the E was decreased when thc h(w) or t was increased. In the variety v_1 the E became minimum at the upper or middle position of a stalk, and was increased toward the lower position. This tendency was shown in the variety v_2 too, but the degree of change with the stalk position in the v_2 Was smaller than that in the v_1. The appearance of the change in the E_G Was very similar to the above-mentioned results in the E (Fig. 5 and 6). (4) The influence of w on tensile characteristics (P_m, ε, E or E_G) was very much greater than that of t (Fig.4 and 6).
社団法人日本材料学会の論文
1974-12-15

著者

斎藤孝平
日本専売公社中央研究所

たばこの引張特性に及ぼす温,湿度(水分),着葉位置の影響に関する実験的研究

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