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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 ...
Phytochemical investigation of thymus decassatus l. 1. Flavonoids and volatile oil
(
Qatar University
, 1993 , Article)
Investigation of the flavonoidal constituents of Thymus decassatus, L. resulted in the isolation and identification of thymonin, 5,6,4'-trihydroxy-7,3'-dimethoxyl flavone, and apigenin. Investigation of the volatile oil ...
Evaluation of Some Local Egyptian Plants as a Source of Chlorophyll Pigments
(
Qatar University
, 1994 , Article)
Four plant materials viz. Spinacia oleracae Linn, (spinach), Beta vulgaris Limm (chard), Medicago sativa Linn, (alfalfa) and Petroselinum sativum Hoff. (parsely) were studied as local sources for the preparation of chlorophyll ...
The Inhibitive Action Of Sodium Soya Sulphonate Towards The Corrosion Of Aluminium In Hydrochloric Acid
(
Qatar University
, 1993 , Article)
The dissolution of aluminium in 2M hydrochloric acid in the presence of sodium soya sulphonate (SSS) as corrosion inhibitor has been studied using hydrogen evolution and thermometric methods. The two methods gave consistent ...
Viscous Behavior of Dilute CMC Salt Solution Before and After Photodegradation
(
Qatar University
, 2006 , Article)
Photodegradation curve of carboxymethylcellulose (CMC) in aqueous solution has been reported. Densities and solution viscosities of very dilute CMC salt solution before and after UV-irradiation have been measured. ...
Formation of Usual and Bridging Complexes using organoselenium and -Tellurium compounds
(
Qatar University
, 2005 , Article)
The reactions of l,3-benzoselenadiazole with some diiodo selenium and tellurium heterocyclic compounds have led to the formation of charge transfer complexes. From the same reactions but in the presence of I9PtC14 new types ...
Phytochemical Studies On The Marine Algae Of Qatar, Arabian Gulf
(
Qatar University
, 1990 , Article)
The most dominant twenty three algal species representing the main three groups of benthic macroalgae, Chlorophyceae, Phaeophyceae and Rhodophyceae were collected from the coastal zones of the Qatar peninsula. These algae ...
Stability Constants of Lanthanide Complexes with some Structurally Related Organic Ligands
(
Qatar University
, 1982 , Article)
The stability constants of the complexes formed between trivalent lanthanide ions and related carboxyphenylhydrazo-B-diketones ligands are repoted, at 30 °C and at constant ionic strength (0.1 KN03), in 75 % dioxane-water. ...
Studies on Soil Cements: 1 - Role of Hydrated Lime and Dolomitic Monohydrate in Montmorillonite Stabilization
(
Qatar University
, 1982 , Article)
Montmorillonite clay was stabilized by either hydrated lime or the dolomitic monohydrate (Ca(OH)2. MgO) during suspension hydration at 25 and 60°C for 45 days. The distinct phases produced from the hydration of each ...
Microdetermination Of Some Organic Nitriles Using The Cyanide Ion Selective Electrode
(
Qatar University
, 1985 , Article)
The response characteristics of the solid state cyanide ion selective electrode toward some organic nitriles are investigated. In 10 M KOH solution, the electrode exhibits near Nemstian response over the range of 10~2 to ...