No abstract available

No abstract available

[en] If spinor structure of the neutron field is taken into account, neutron-antineutron oscillations cannot be described by a mass matrix. Cases with and without parity violation are considered

[en] Symmetry-breaking solutions of Green's function equations derived from Lagrangians without continuous internal symmetry are considered. The problem is discussed without appealing to perturbation theory. (U.K.)

[en] The author takes 'spacetime' R X R² X S¹ as a simple example of non-minkowskian spacetime and calculates the electromagnetic self-energies of massive and massless charged fields with spin 0, 1/2 and 1 to second order in perturbation theory. It is found that massless scalar and vector fields acquire a gauge-dependent mass and the mass renormalization of massive scalar and vector fields are gauge-dependent, while a massless spinor field does not acquire a mass and the mass renormalization of a massive spinor field is gauge independent. (Auth.)

[en] Green's function equations are considered for interacting spinor and (pseudo) scalar fields with interactions gbarpsiγpsiphi + 1/4 lambdaphi⁴. These equations do not determine higher many-point functions if two-point functions are given as 'input'. If vertex parts are given as input, two-point functions are determined but higher many-point functions are not determined. (author)

No abstract available

[en] The one-loop contribution to the self-energy of a massless scalar particle with a lambdaphi⁴ self-interaction is investigated in non-minkowskian spacetimes. It is found that the particle may acquire a mass in order lambda in perturbation theory. (Auth.)

[en] Any means helpful for the promotion of termite feeding activity has potential for use in a matrix in termite bait application. Therefore, energy transfer by gamma irradiation is worthy of consideration for converting wood into termite-accessible material. Wood specimens gamma-irradiated at 100 kGy and at lower levels were tested for their degrees of polymerization (DP) of cellulose and biological resistance. The DP of cellulose adversely decreased with increased doses of gamma irradiation. Termite wood consumption rates, which were determined by laboratory tests using undifferentiated larvae (workers) of Coptotermes formosanus Shiraki, were significantly higher at 100 kGy than at other doses. On the other hand, the decay resistance of gamma-irradiated wood against the fungi Fomitopsis palustris (Berkeley et Curtis) Murrill and Trametes versicolor (L. ex Fr.) Quel did not vary by irradiation dose. (author)

[en] In the course of the studies on preparation of novel compounds using the dissolution of Eu or Yb metals in liquid ammonia, the formation of Yb-Cu and Yb-Ag intermetallic films has been found. When Cu or Ag metal powders were placed in a reactor containing a solution of Yb metal in liquid ammonia, the dissolved Yb readily react with the Cu or Ag metal particles to form surface alloy compounds. X-ray diffraction of Yb-Cu showed that upon thermal treatment above 673 K, the Yb metal deposited on the Cu particles reacted together to be transformed into the YbCu_6.5 intermetallic compound. A characteristic endothermic peak at 749 K, due to alloying of Yb-Cu, was observed by the differential scanning calorimeter measurements. By use of the high reactivity of liquid ammonia metal solutions of ytterbium, it was found that the ytterbium intermetallic films were readily formed under mild conditions. Yb-Cu and Yb-Ag exhibited enhanced catalytic activity for the hydrogenation of ethene as a result of alloying