Naschie, M. S. E., S. ALATHEL, A. S. Wifi, and C. W. Wu,
"A Discrete Element Method for Nonlinear Bifurcation of Elastic Structures",
TRANSACTIONS OF THE CANADIAN SOCIETY FOR MECHANICAL ENGINEERING, vol. 11, no. 1: CANADIAN SOC MECH ENG DEPT MECHANICAL ENGINEERING UNIV OF ALBERTA, EDMONTON AB T6G 2G8, CANADA, pp. 13–20, 1987.
Abstractn/a
Bachman, S. E., J. M. Bachman, and M. A. G. D. I. M. MASHALY,
"Effect of photoperiod on the diurnal rhythm of plasma testosterone, dihydrotestosterone and androstenedione in mature male chickens",
Comparative Biochemistry and Physiology Part A: Physiology, vol. 87, issue 3: Elsevier, pp. 775-779, 1987.
Abstractn/a
El‐Sherbini, T. M., A. A. Farrag, H. M. Mansour, and A. A. Rahman,
"Electric dipole oscillator strengths and radiative lifetimes in the boron isoelectronic sequence",
Annalen der Physik, vol. 499, issue 6: Wiley Online Library, pp. 412-418, 1987.
Abstractn/a
Darwish, K. A., M. Mounir, A. L. El-Ansary, and H. B. Hassib,
"Electrical properties of charge transfer complexes of 2-aminopyrimidine and 2-aminopyrazine schiff bases with nitrobenzene derivatives",
Thermochimica Acta, vol. 114, no. 2, pp. 265 - 271, 1987.
AbstractA study of the electrical properties of charge-transfer (CT) complexes of 2-aminopyrimidine and 2-aminopyrazine Schiff bases with mtrobenzene derivatives has been done. The investigation comprises the 1:1 as well as the 1:2 donor: acceptor (D:A) complexes. The behaviour of the electrical conductivity for all \{CT\} complexes m the studied range of temperatures indicates a semiconducting character. The 1:1 \{CT\} complexes show higher electrical conductivity values with respect to those of the corresponding Schiff bases due to the increased π-electron delocalization in the \{CT\} complexes. The decrease of activation energy in dinitrobenzene \{CT\} complexes with respect to the corresponding Schiff base is lower than that observed in trinitrobenzene derivatives. This confirms that the molecular complexes of the former are much weaker than the latter. The 1:2 complexes are characterized by higher activation energy values (lower electrical conductivity) with respect to the corresponding 1:1 complexes: a behaviour which is due to participation of both rings in \{CT\} leading to an increased localization of the π-electrons. There is a correlation between the dielectric constant for most of the studied \{CT\} complexes and their electrical conductivities.
Mounir, M., K. A. Darwish, A. L. El-Ansary, and H. B. Hassib,
"The electrical properties of some 2-aminopyrimidine and 2-aminopyrazine schiff bases",
Thermochimica Acta, vol. 114, no. 2, pp. 257 - 263, 1987.
AbstractThe electrical properties of some Schiff bases of 2-aminopyrimidine and 2-aminopyrazine with benzaldehyde derivatives have been investigated. Such measurements have rarely been done on these compounds. The positive temperature coefficient of electrical conductivity (dσ/dT) found for all the samples investigated is evidence for the semiconducting character within the range of temperature studied. For the compounds studied, a correlation between the electrical properties and their chemical structure is established. The mechanism of the conduction process in these samples is also studied.