[en] In the Alpha-particle model, we can consider the equilibrium configuration of the four and the five alpha particles of ¹⁶ o and ²⁰ Ne respectively to be a tetrahedron belonging to the symmetry group T_d. Using Gaussian potential and with Hartree-Fock method, binding energy, root mean square radius and form factors are evaluated. A good fit to experimental data is achieved. 5 figs., 1 tab

[en] The total number of general protein bands separated electrophoretically in the full grown larvae of Phthorimaea Operculella to 8 bands. The number of these bands changed after treatment with different insecticides. The number increased to 10 bands after using diflubenzuron (d) whereas it decreased to 6 and 7 bands after using bioresmethrin (b) petroleum ether extract of Artimisia Absinthium (PE), respectively. exposing the full grown larvae to gamma irradiation alone (50 Gy) resulted in decreasing the number of bands to 7. The number of bands generally increased to 10, 11 and 9 when radiation was combined with bioresmethrin (B+R), diflubenzuron (D+R) or extract of Artimisia Absinthium (PE+R), respectively. The number 6 is considered as a major protein constituent since it was detected after the treatments with high relative concentration (R C). The band number 4 was found after all treatments except for B with low R C. The band number 7 was found after all treatments except for D and PE+R with high R C. Bands number 9 and 11 were detected after all treatments except PE and R, respectively with low R C. 2 figs., 2 tab

[en] The accumulated effects of irradiated materials in the mediterranean fruit fly (medfly), ceratitis capitata (Wied) offsprings resulted from successively irradiated generations of eggs, pupae or adults were evaluated . Results showed that successive irradiation affected only the biological parameters that concern with the genetic cells i.e. sterility and fecundity. On the other hand, parameters concern the somatic cells i.e. Survival, sex-ration and mating activity were not significantly affected

[en] Eggs of the mediterranean fruit fly, ceratitis capitata (24 h. old) were dipped in solutions of 5 or 160 ppm of dimilin for 24 hours, the produced pupae were irradiated with 70 or 90 Gy gamma radiation. This dipping led to a decrease in the fertility and an increase in mating competitiveness of the produced males. However, when the LC₅₀ of either dimilin or IKI was mixed with the larval medium on which eggs were planted, and the produced pupae were irradiated (70 or 90 Gy) neither adult emergence adult survival was affected. However, egg hatch ability was affected by radiation and insignificantly affected by using either chemical applied separately, and significantly decreased when applying radiation and either chemical in combination together. Male mating competitiveness was not significantly when radiation and either chemical was applied together. 5 tabs

[en] Chelex-100, in the anionic form has been studied for its ability to perform selective separation and concentration of some metal of nuclear importance from mineral acid solutions. Thus, the sorption behaviour of Zr(IV)-Nb(V), Mo(VI), Tc(VII), Te(IV) and U(VI) from solutions of hydrochloric and sulphuric acids on chelex-100 has been studied under static and dynamic conditions. The sorption behaviour of Ce(III) and Am(III), as representative for the trivalent lanthanides and transplutonium elements respectively, and Th(IV) has also been investigated. Mo(VI) and Tc(III) have been concentrated on the resin from hydrochloric or sulphuric acid solutions at low acidities probably, as the anions Mo O₄² and Tc O₄, respectively. Te(IV) has been isolated from hydrochloric acid solutions of normalities ≥ 6 in the form of the anionic chloro complex Te Cl₆². Optimum conditions for elution and separation of Mo(VI), Tc(VII), Te(IV) and U(VI) were recommended.5 figs., 1 tab

[en] The present work was carried out on the onion bulb fly, Eumerus Amoenus to study the changes which occurred in the components of the sterilized adults, especially the total protein content and amino acid composition. The total protein content in males was more than in females and decreased in sterilized males. An increase from 170.8 in the control to 177.5, 214.3 and 207.7 mg/g body weight was noted in sterilized females. The amino acid contents of the sterilized flies was greatly affected, the effect was obvious in alanine, glycine and glutamic acid. 2 tabs

[en] This paper offers an additional material for decontamination of radioactive nuclides of ion exchange mechanism. Grafted and non-grafted synthetic ion-exchange membranes namely nylon-6 were used for decontamination of radioactive ¹⁵²,¹⁵⁴ Eu. The grafting process of nylon-6 was carried out using acrylic acid, acrylamide and a mixture of both. Pretreatment of the synthetic ion exchange membranes (annealing) using formic acid was also tried. The results obtained indicated that grafting, in general, increases the uptake of radioactive Eu by nylon-6 ion-exchange synthetic membranes due to the formation of side branches which increase the active centers and expand the surface area of the polymer and consequently its uptake capacity, in addition to the hydrophilic character of the polymer. Annealing of nylon-6 with formic acid before grafting was also studied to evaluate its effect on the uptake capacity. The uptake % of ¹52^,154 Eu of both non-grafted and irradiated nylon-6 films did not exceed 60%, while that of grafted one reached about 99%. Annealing process of non-grafted nylon-6 films with formic acid affected positively the uptake capacity in case of acrylic acid grafting, while suppressed the uptake capacity in case of acrylamide grafting. This may be due to much higher swelling capacity of the annealed membranes than that of the non annealed ones, which can be attributed most probably to phase separation between the polyacrylamide and the nylon matrix. 6 figs

[en] The effect of larval pretreatment with malathion on sensitivity of the resulting pupae of the rice moth, corcyra cephalonica subjected to gamma radiation was studied. The combined application of malathion and gamma radiation caused a great reduction in both fecundity and fertility of adults as compared to the effect of gamma radiation or malathion alone. The percent pupation and adult emergence among the first generation were decreased when the parents irradiated as full grown pupae were pretreated with malathion in the larval stage. The females were more sensitive than males to the effect of insecticide or gamma radiation or the combined effect of both. 1 fig., 3 tabs

[en] The aim of the present is to consider the influence of pr equilibrium processes on the activation cross-sections of ²⁷ Al(n,p) ²⁷ Mg, ⁵¹ V(n,p) ^51m Ti, ⁸⁸ Sr(n,p) ^88m Rb, ⁹⁴ Zr(n,p) ^94m Y and ^97Mo(n,p) ^97m Nb in the neutron energy range 13 to 15 MeV. Comparison with recent measurements is given for all considered isotopes. 2 figs., 1 tab

[en] Three day-old adults of the confused flour beetle, tribolium confusum were irradiated with gamma doses (10-40 Gray) to investigate the effects of irradiation on the F₁ development and on the activity of esterase enzyme in F₁ adult males and females. The total numbers of the F₁ larvae, pupae and adults were decreased with increasing the irradiation dose. Esterase pattern of the adults was affected by the higher doses of irradiation. The mutagenic effect of these doses is represented by the disappearance of the electrophoretic patterns of some beetles.4 Figs., 1 Tab