Zn0.95−xFe0.05BxO (x=0, 0.05) nano-particles have been synthesized using a modified chemically derived citrate gel method. X-ray diffraction analysis demonstrates the wurtzite type hexagonal structure belonging to P63mc space group without the presence of any secondary phase in both compositions. The Diffraction analysis shows that Fe2+ and B3+ions have replaced some of the Zn2+ ions while some occupy un-detectable interstitial and inter-granular positions inside the structure.

In this study we investigated the effects of different cryomazine concentrations and host type on the biology of the southern cowpea weevil Callosobruchus maculatus F. (Coleoptera: Bruchidae). Our results showed that increasing cryomazine concentration led to the increase in the average incubation period of eggs and low hatching rate, reaching the highest average of egg incubation period 13.25 days for insects reared on a mung beans treated with cryomazine concentration of 3 and 5%.

Overlap of insect growth regulator (cyromazine) concentration, treatment method and rearing temperature was studied on the southern cowpea weevil, Callosobruchus maculatus F. (Bruchidae: Coleoptera), under laboratory conditions. A concentration of 5% cyromazine and dipping treatment at 30°C showed a significant reduction in the reproductive rate by 0.5%. Moreover, increasing the cyromazine concentration led to a decrease in food consumption. Hence, treatment of cowpea seeds via dipping method provided more protection compared to spraying method.

 In Ar-Riyadh Region in the Kingdom of Saudi Arabia (KSA), the Governorates of Al-Zulfi, Al-Ghat and Al-Majmah (north zone), of Al-Hariq, Al-Aflaj and Hawtat Bani Tamim  (south zone), of Hijrat Sa`ad (east zone), of Shaqra, Durma, Al-Qasab, Huraimela`a (west zone) and Riyadh City (central zone) were surveyed for the presence of Pachycondyla sennaarensis monthly during the period from December 2007 to December 2009. The ant was not detected in Al-Majmah or Al-Zulfi.

Black ant (Samsum), Pachycodyla sennarrensis, stings and injects venom and inflicts allergy (a rare clinical problem) due to its local and systemic reaction, which is considered as a health hazard amongst Saudi society. Thus, black ant is a source of serious concern for the government and experts as well.

We report the effect of glucose (C6H12O6) doping on the structural and electromagnetic properties of MgB2 superconductor fabricated by dry mixing using planetary ball milling. Herein, as-prepared bulk polycrystalline Mg (B1–xCx) 2 samples with different doping levels (x = 0, 2, 4, and 6 at. %) were systematically studied by X-ray diffraction, magnetic and resistivity measurements, and microstructure analysis. When carbon doped, the reduction in critical transition temperature and shrinkage in a-lattice were obviously observed.