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Asian Pacific Journal of Tropical Biomedicine 2012年第8期2卷 645-650页

作者： Angela J Umosen Suleiman F Ambali Joseph O Ayo Bisala mohammed Chidiebere Uchendu Department of Veterinary Pharmacology Ahmadu Bello University Department of Veterinary Physiology Ahmadu Bello University Department of Veterinary Pathology Ahmadu Bello University

Objective:To evaluate the alleviating effects of melatonin on oxidative changes in the testes and pituitary gland induced by subacute chlopyrifos（CPF） exposure in ***:Forty adult male Wistar rats divided into 4 groups of 10 animals were used for the *** I received soya oil（2 mL/kg） while group II was administered with melatonin（0.5 mg/kg）.Group III was administered CPF only(8.5 mg/kg l/10th of the LD50) while group Ⅳ was pretreated with melatonin（0.5 mg/kg） and then exposed to CPF（8.5 mg/kg）,10 min *** regimens were administered by gavage once daily for a period of 28 *** the end of the exposure period, the rats were sacrificed and the testicular tissues and pituitary glands were evaluated for the malonaldehyde（MDA） concentration and activities of superoxide dismutase（SOD） and catalase（CAT）.Results:CPF increased MDA concentrations and reduced the activities of SOD and CAT in the testes and pituitary *** pretreatment reduced the testicular and pituitary MDA concentrations and improves the SOD and CAT ***:the study showed that subacute CPF-induced oxidative stress in the testes and pituitary glands were alleviated by melatonin due to its antioxidant property.

关键词： Chlorpyrifos Oxidative stress Testes Pituitary glands Alleviation Melatonin

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道砟劣化的二维图像分析及形状特性研究

铁道科学与工程学报 2020年第11期17卷 2774-2781页

作者：聂志红陈星臣 Ashiru mohammed Mohamud Saidhussein 中南大学土木工程学院湖南长沙410075 Ahmadu bello University Zaria 810107Nigeria

道砟劣化导致颗粒形态的变化,从而影响道砟使用性能。为探究道砟劣化机理及其表现形式,采用洛杉矶磨耗试验研究道砟劣化过程,通过AIMS集料图像测量系统获得道砟磨耗前后的颗粒图像以及形状指标,结合污染指数(FI)来讨论道砟劣化时的形状... 详细信息

道砟劣化导致颗粒形态的变化,从而影响道砟使用性能。为探究道砟劣化机理及其表现形式,采用洛杉矶磨耗试验研究道砟劣化过程,通过AIMS集料图像测量系统获得道砟磨耗前后的颗粒图像以及形状指标,结合污染指数(FI)来讨论道砟劣化时的形状特性变化。研究结果表明:道砟劣化主要表现为大粒径颗粒尖角破裂和边缘磨损,使得表面和边缘纹理整体更平滑圆润。随着磨耗试验转动圈数的增加,FI值增加的速率逐渐变慢,长扁度、棱角度及粗糙度指数减小的速率也降低。研究结果对道砟劣化评估及养护维修具有参考意义。

关键词：道砟劣化洛杉矶磨耗试验图像分析形状特性

Geochemical Classification and Geotectonic Setting of Granitic Gneisses from Southeastern Margin of Western Nigeria Basement

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Journal of Geological Research 2021年第2期3卷 1-6页

作者： mohammed Olatoye Adepoju Yinusa Ayodele Asiwaju-bello Department of Applied Geology The Federal University of TechnologyAkureNigeria

Chemical whole-rock major oxides and some trace element analyses were done on granitic-gneiss rocks from Dagbala-Atte District,located on the southeastern margin of western Nigeria Basement *** was meant to classify the rocks and to understand the tectonic setting in order to evaluate their crustal *** chemical analyses were done using inductively-coupled plasma mass *** the results obtained,these rocks classified into calc-alkaline to shoshonite series with metaluminous to peraluminous *** are I-type granitoids of feroan *** granitic gneisses formed from metamorphism of granite and ***,most of the rock samples plotted in the field of island arc,continental arc and continental-collisional granitoids,which indicated that the protolith granite and granodiorite are orogenic and are arc related inferring arc tectonic setting.

关键词： Migmatite-gneiss-quartzite complex Granitoid Protolith Calc-alkaline Dagbala-Atte district

First Review of Articles on Rhotrix Theory Since Its Inception

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Advances in Linear Algebra & Matrix Theory 2014年第4期4卷 216-224页

作者： A. mohammed M. Balarabe Department of Mathematics Ahmadu Bello University Zaria Nigeria

This paper presents an up-to-date review of the developments made in the field of rhotrix theory for a decade, starting from the year 2003, when the concept of rhotrix was introduced, up to the end of 2013. Over forty articles on rhotrix theory have been published in journals since its inception, indicating the need for a first review.

关键词： Rhotrix Matrix Rhotrix Theory Matrix Theory

Phytochemical screening and anticonvulsant studies of ethyl acetate fraction of Globimetula braunii on laboratory animals

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Asian Pacific Journal of Tropical Biomedicine 2014年第4期4卷 285-289页

作者： Musa Mumammad Aliyu Abdullahi Isma'il Musa Muhammad Ja'afar Kanial Magaji Garba mohammed Department of Pharmaceutical and Medicinal Chemistry Ahmadu Bello University Department of Pharmaceutical and Medicinal Chemistry Usmanu Danfodio University Chemistry Advance Laboratory Sheda Science and Technology Complex Department of Pharmacology and Therapeutics Ahmadu Bello University

Objective:To investigate the phytochemical properties and the anticonvulsant potential of the ethyl acetate soluble fraction of ethanol leaf extract of Globimetida braunii,a plant used in ethnomedicine for the treatment of ***:The phytochemical screening was carried out using standard protocol while the anticonvulsant activity was studied using maximal electroshock test in chicks,pentylenetetrazole and 4-aminopyridine—induced seizures in ***:The preliminary phytochemical screening carried out on the crude ethanol extract revealed the presence of saponins,carbohydrates,flavonoids,tannins,anthraquinones and ***,tannins,flavonoids and steroids/terpenes were found to be present in the ethyl acetate fraction,In the pharmacological screening,150 mg/kg of the fraction protected 83.33%of animals against pentylenetetrazole-induced seizure in mice whereas sodium valproate a standard anti-epileptic drug offered 100%*** the 4-aminopyridine-induced seizure model,the fraction produced a significant(P<0.05)increase in the mean onset of seizure in unprotected *** fraction did not exhibit a significant activity against maximal electroshock *** median lethal dose of the fraction was found to be 1261.91 mg/***:These results suggest that the ethyl acetate fraction of Globimetula braunii leaves extract possesses psychoactive compound that may be useful in the management of petit mal epilepsy and lend credence to the ethnomedical use of the plant in the management of epilepsy.

关键词： Epilepsy Globimetula braunii Seizure Medicinal Pentylenetetrazole

Lycopene Ameliorates Diabetic-Induced Changes in Erythrocyte Osmotic Fragility and Lipid Peroxidation in Wistar Rats

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Journal of Diabetes Mellitus 2017年第3期7卷 71-85页

作者： Ejike Daniel Eze Yusuf Tanko Ahmed Abubakar Sheu Oluwadare Sulaiman Karimah mohammed Rabiu Aliyu mohammed Department of Physiology Faculty of Biomedical Sciences Kampala International University Kampala Uganda Department of Human Physiology Faculty of Medicine Ahmadu Bello University Zaria Nigeria Department of Pharmacognosy and Drug Development Ahmadu Bello University Zaria Nigeria Department of Physiology Faculty of Medicine Kampala International University Dar es Salaam Tanzania Department of Biological Sciences Faculty of Science Yobe State University Damaturu Nigeria

Introduction: Diabetes mellitus has remained one of the serious health problems in the world;and oxidative stress has been reported to be a root cause for the progression and development of diabetes mellitus and its associated complications. Aim: This study investigated the possible ameliorative effects of lycopene on diabetic-induced changes in erythrocyte osmotic fragility and lipid peroxidation in Wistar rats. Methodology: The animals were made diabetic by single intraperitoneal injection of streptozotocin at 60 mg/kg b w. Diabetes was confirmed by the presence of high fasting blood glucose level ≥ 200 after 72 hours. Thereafter, diabetic rats were randomly assigned into six groups (1, 2, 3, 4, 5 and 6) comprising five animals each. Group 1 (Diabetic control) and group 2 (Normal control) rats received 0.5 ml of olive oil, groups 3, 4, 5 rats received 10, 20, 40 mg/kg bw of lycopene respectively, while those in group 6 received 2 mg/kg bw of glibenclamide orally once daily for a period of four weeks. At the end of the treatment, all animals were sacrificed;blood samples collected for determination of erythrocyte osmotic fragility (EOF) and lipid peroxidation (LPO). Results: The results obtained showed that there was a significantly (P Conclusion: From the available findings, it can be concluded that administration of lycopene to diabetic rats attenuated diabetic-induced changes in EOF and LPO and these observed effects may be attributed to anti-oxidative property of lycopene.

关键词： Diabetes Mellitus Streptozotocin Lycopene Erythrocyte Osmotic Fragility Lipid Peroxidation Rats

Rhotrix Linear Transformation

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Advances in Linear Algebra & Matrix Theory 2012年第4期2卷 43-47页

作者： Abdul mohammed Musa Balarabe Abdussamad Tanko Imam Department of Mathematics Ahmadu Bello University Zaria Nigeria

This paper considers rank of a rhotrix and characterizes its properties, as an extension of ideas to the rhotrix theory rhomboidal arrays, introduced in 2003 as a new paradigm of matrix theory of rectangular arrays. Furthermore, we present the necessary and sufficient condition under which a linear map can be represented over rhotrix.

关键词： Rhotrix Rank Rhotrix Rank Linear Transformation Rhotrix Linear Transformation

The Synthesis of Diaminoanthraquinone Coloured Cross Linked Epoxy Resins and Their Application in Paint and Selected Polymers

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Open Journal of Applied Sciences 2014年第1期4卷 13-21页

作者： Zwahruddeen Muhammad Salisu mohammed Kabir Yakubu Peter Obinna Nkeonye Hamza Abba Department of Chemistry Ahmad Bello University Zaria Nigeria Department of Textile Science and Technology Ahmadu Bello University Zaria Nigeria National Research Institute for Chemical Technology (NARICT) Zaria Nigeria

Novel polymeric pigments were synthesized in xylene by cross linked epoxy resin with 1,4 and 1,5-diaminoanthraquinones, by varying weight fractions from 5% to 20% of the diaminoanthraquinone derivatives. FTIR, UV and solubility tests were carried out. The pigments were then used to colour PLA, PMMA, PE and also in emulsion paints using polyvinyl alcohol as binder. Their light fastness, surface drying time and surface hardening time were assessed. It was found that λmax of the 1,4-diaminoanthraquinone shifted towards longer wavelength after the cross linkage, in contrast to the 1,5-diaminoanthraquinone which suffered a blue shift. However in all the cases, the λmax was not affected by the weight fractions of the anthraquinones, but the absorptivity coefficients was significantly increased as the weight fractions of the anthraquinones increased. The light fastness properties of the coloured plastics varied from 4 to 7, indicating a trend of increase with the weight fractions of the anthraquinones. Similar observations were seen with the emulsion paints produced. In all the cases, the 1,4-diaminoanthraqunione produced better result.

关键词： Epoxy Resin Diaminoanthraquinone Derivatives Chromophore Pigments

Synthesis and Characterisation of Colorants Derived from 1,4-Diamino Anthraquinone Polyamides

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Advances in Chemical Engineering and Science 2012年第2期2卷 300-308页

作者： mohammed Kabir Yakubu Mohammad Sani Gumel Mansur Bala Ibrahim Rakesh Kumar Centre for Scientific and Industrial Research (CSIR) Materials Science and Manufacturing Port Elizabeth South Africa Department of Pure and Industrial Chemistry Bayero University Kano Nigeria Department of Textile Science and Technology Ahmadu Bello University Zaria Nigeria

In this study, the polycondensation products of a diamine anthraquinone (1,4-diamino anthraquinone) and some aliphatic diacids with different methylene numbers were synthesised. Their UV-visible spectroscopy and thermal properties were then characterised. The synthesis was achieved by reacting equimolar solutions of the amine and the acid halides. The structure and thermal properties of the products were characterised. FT-IR Spectra of all the three products revealed the formation of amide due to the presence of strong bands at 1565 and 3390 cm?1 assignable to C=O stretching and N-H vibrations. Differential Scanning Calorimetry revealed high melting exotherms for the products. Thermogravimetry revealed moderate thermal stabilities for Poly NAM and Poly NAS and low thermal stability for Poly NAA which indicated 5.9%, 7.1% and 61.2% weight losses at 285℃, 285℃ and 374℃ for the three products respectively. The wavelengths of maximum absorbance for the dye samples are 601.5, 591 and 589 nm respectively with absorptivity coefficients (a1cm1% ) of 11640000, 11610000 and 11560000 respectively.

关键词： Anthraquinone Polymeric Dyes Polyamide Synthesis Characterisation

Impact of Swelling Indices of Sokoto Clays on the Moulding Properties of the Clays in Sand Mixtures

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Journal of Minerals and Materials Characterization and Engineering 2012年第10期11卷 1050-1054页

作者： Ihom A. Paul Suleiman U. mohammed Nyior G. Bem Department of Metallurgical and Materials Engineering Ahmadu Bello University Zaria Kaduna State Nigeria Department of Metallurgy National Metallurgical Development Centre Jos Plateau State Nigeria

The Impact of Swelling Indices of Sokoto Clays on the Moulding Properties of the Clays in Sand Mixtures was investi- gated. Four clays (labeled A, B, C, D) from different locations in Sokoto state of Nigeria were sampled. The sampling method was that for each deposit five samples were taken at different positions and then mixed together. At the labora- tory they were washed to remove organic matter and then dried at 110°C in the oven. A laboratory ball mill was used to grind the dried clays. Each of the clay was then sampled for the determination of its swelling index. The determination of the moulding properties of the clays then followed. Only green compression strength, dry compression strength and green permeability, moulding properties were determined. The analysis of the result revealed that clay B has the highest green and dry strength values it had the highest green compression strength of 71.7 KN/m2 and the highest dry com- pression strength of 3225.75 KN/m2. Clay B also has the highest swelling index of 60% and very high degree of expan- siveness when compared to the other three clays. Clay B was followed by clay A with swelling index of 25%;the clay has high green and dry compression strength and a moderate degree of expansiveness. The inability of clay D with swelling index of 40% to be the next clay to clay B which has the highest swelling index of 60% among the four clays in terms of good moulding properties is an indication that high swelling index does not always mean good moulding properties in clay binders.

关键词： Effect of Swelling Index Clay Sokoto Properties Mould Mixtures