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PhD theses : Science: Recent submissions
Now showing items 181-200 of 647
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(جامعة السودان للعلوم والتكنولوجيا, 2019-08-10)تناول هذا البحث دراسة إزالة تأثير المشاهدات الشاذة على نتائج توفيق نموذج الانحدار الخطي. و يهدف الى التوصل لطرق تشخيص و معالجة يُعتمد عليها لإزالة تأثير المشاهدات الشاذة تتسم بالموضوعية و الكفاءة و سهولة التطبيق. حيث تم ...
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إستخدام إسلوبي تحليل الانحدار اللوجستي و التحليل التمييزي للعوامل المؤثرة على الإصابة بأمراض القلب (جامعة السودان للعلوم والتكنولوجيا, 2019-05-10)تشخيص أمراض القلب باستخدام نماذج تصنيفية و تمييزية إحصائية متقدمة يعتبر أمراً هاماً لكون أمراض القلب من الأمراض الخطيرة و التي تفتك بحياة المصاب، لذا يجب التشخيص المبكر و ذلك من خلال تصنيف و تمييز المرضي إلى مصابين و غير ...
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(Sudan University of Science and Technology, 2019-09-10)Fourteen Amino acid complexes, eight complexes [M(L)2]Cl type of Co (II) ion with glycine, serine, arginine, aspartic acid, Cu (II) and Fe (III) ions with glycine, Zn (II) ion with cysteine, and Ni (II) ion with leucine, ...
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Characterization of Some Phytochemicals from Sudanese Medicinal Plants and their Biological Activity (Sudan University of Science and Technology, 2019-09-10)This study was designed to study the constituents of the oils of some Sudanese medicinal plants and to assess their antimicrobial effect. The GC-MS analysis of Azadirachta indica oil revealed the presence of 29 components. ...
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(Sudan University of Science and Technology, 2019-09-10)This research was carried out to study the flavonoids of Pulcariacrispastem and oilsfromPortulacaoleracea,Coriandrumsativam andLinumusitatissimum. The stems of Pulcariacrispa were extracted with 95% ethanol at ambient ...
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(Sudan University of Science and Technology, 2019-05-27)This research is study about control theory, a primary objective of a control theory is to make the output of a dynamic process behave in a certain manner. Control theory is an interdisciplinary branch of engineering and ...
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(Sudan University of Science and Technology, 2019-10-20)In this work the optical properties of two group of samples were studied. In the first group Zinc Oxide was doped by ( Al ,Cd, Co, Li and Mg ). In the second group Titanium Oxide was doped by ( Al ,Cd, Co, Li and Mg ) ...
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(Sudan University of Science and Technology, 2019-08-22)In this research the carbon Nanotubes were doped by TiO2, MgO, CuO and ZnO, such that four samples from each metal oxide were prepared at different annealing temperatures (450,500,550 and 600)C0. The optical properties ...
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(Sudan University of Science and Technology, 2019-01-23)Moringa oleifera Lam. tree grows in many tropical and subtropical countries. The seed, leaves, root and flowers of M. oleifera are often used in traditional medicine, while the immature pods, leaves and seed are used as ...
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(Sudan University of Science and Technology, 2018-10-15)Samplesof Anogeissusleiocarpusgum were randomly collected as natural exudates from different locations of the Sudan gum belt. The physicochemical properties of composite samples studied were moisture content, ash, nitrogen, ...
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(Sudan University of Science and Technology, 2019-10-22)This study is concerned with derivation of quantum relation in a curved space –time . The importance of this study emerges from the use of energy and momentum in many applications. This study use mathematical derivation ...
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(Sudan University of Science and Technology, 2019-08-17)The flavonoids of two key species in Sudanese ethnomedicine have been investigated and three compounds (I-III) have been isolated. CompoundI wasisolatedfrom Combretum aculatum roots viapaperchromatography, while compounds ...
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(Sudan University of Science and Technology, 2019-10-12)This study aimed to investigate the major flavonoids of Terminalia brownie, Ziziphus abyssinica and Cassia sieberianaroots and to screen these plants for their antimicrobial activity. The flavonoids were extracted with ...
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(Sudan University of Science and Technology, 2019-10-03)In this thesis we studied one of the most important properties of a submanifold, namely the curvature that describes different geometrical and topological properties of a submanifold. We have three classes of submanifolds ...
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(Sudan University of Science and Technology, 2019-07-22)Simple, accurate, precise and economical UV spectrophotometric methods for estimation of tinidazole and domperidone have been developed and validated. The wavelengths of maximum absorbance selected for tinidazole and ...
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(Sudan University of Science and Technology, 2019-01-31)In the present study a number of α,β-unsaturated carbonyl compounds were prepared followed by cyclization with hydroxylamine hydrochloride to yield the isoxazoles derivatives. These α,β-unsaturated carbonyl compounds were ...
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(جامعة السودان للعلوم والتكنولوجيا, 2019-05-15)السلاسل الزمنية متعددة المتغيرات تعتبر من الأساليب الإحصائية الهامة التى تتنأول سلوك الظواهر وتفسيرها عبر حقب زمنية محددة ، وتنشأ العملية المتعددة عند ملاحظة سلسلة زمنية مع أخرى في وقت واحد ، تكمن مشكلة البحث فى الحوادث ...
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(Sudan University of Science and Technology, 2019-05-02)When different techniques of sampling are used, there are different formulas for determination of appropriate sample size. The aim of this study was to employ formula for determining representative sample size, when simple ...
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(Sudan University of Science and Technology, 2019-08-15)Samples of Five different plants(Psidium guajava (Aljawafa),Schoenanthus cymbopogone (Almharib) , Solenostemma argel(Alhargil), Hyphaene thebaica (Aldoum) and Petroselinum crispum (Albagdunas) used in many parts of Sudan ...
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(Sudan University of Science and Technology, 2019-06-10)The aim of this work is to find the optical parameters like absorption coefficient and energy gap and to find the electric permittivity and magnetic permeability for (Fe3O4 and Ni2O3) Nanomaterial thin films that were ...
Now showing items 181-200 of 647
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