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The effect of two substituents on different organoselenides and tellurides to form new charge-transfer complexes
(
Qatar University
, 2004 , Article)
Different organotellurides and selenides were prepared as electron donors and reacted with p-Benzoquinone (p-BQ) and m-Dinitrobenzene (m-DNB) as electron acceptors .
The resulted molecules were considered as new ...
Preparation, Characterization and Structural Determination of some coordination compounds of quadridentae thiosemicarbazone
(
Qatar University
, 2004 , Article)
New transtion metal complexes of Co", Ni" and Cu" with benzil bis 4-(p-Chlorophenyl-thiosemicarbazone) and benzil bis 4-(p-Bromophenyl-thiosemicarbazone) were synthesized. Attempts were made to ascertain their probable ...
Application of Stripping Voltammetry for the Determination of Cadmium, Lead, Copper and Zinc in Yemani soils and Vegetables
(
Qatar University
, 2004 , Article)
Heavy metals contents in the solutions from acid digestion of Yemeni soils and vegetables were deter¬mined by differential pulsed anodic stripping voltammetry. The geometric mean for Cd, Pb, Cu and Zn concentrations for ...
فعالية استخدام تقنية التشعب النصي في تدريس الكيمياء لطالبات السنة الأولى في المستوى الجامعي لكلية العلوم جامعة الملك عبد العزيز بجدة
(
Qatar University
, 2004 , Article)
يتناول البحث الحالي التحقق التجريبي من فعالية استخدام تقنية التشعب النصي Hypertext كخاصية من خواص معالجة النصوص لتكوين قاعدة بيانات يتم الربط بينها باستخدام مجموعة من الإحالات المرجعية cross-references تسهل على القارئ ...
Z1, center orientations and adsorption of atomic halogens at the (001) surfaces of Alkaili Chloride Crystals: DFT Calculations.
(
Qatar University
, 2004 , Article)
An attempt has been made to examine the relative stabilities of Z, center orientations at the surfaces of
Be2+, Mg2+ and Ca2+ doped LiCl, NaCl and KC1 ionic crystals as well as the effects of Z, center on the
adsorption ...