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RISS 인기검색어
- 검색키워드
- 저자 : Suleiman Mohammed M. (검색결과 3 건)
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Mohamed F. Suleiman,Bahram M. Shahrooz,Herbert L. Bill,Patrick J. Fortney,William A. Thornton 한국강구조학회 2017 International Journal of Steel Structures Vol.17 No.2
Twisting and lateral-torsional stability of extended shear-plate connections could be a design issue due to the relatively long distance between the weld and the bolt centroid of the shear tab, and the eccentricity between the thickness of the connection plate and web of the supported beam. The 13th edition of the Steel Construction Manual did not include checks for determining whether or not twisting would have to be considered as a controlling design limit state. However, the current edition (i.e., the 14th edition) provides a methodology for evaluating the need for stiffeners (also called stabilizer plates) that based on the amount of twisting of the connection plate. This paper presents the results of three-dimensional non-linear finite element analyses of a number of extended single plate connections in which the floor slab, which braces the top flange of the supported member, was incorporated. The primary goal of the reported research was to examine the need for stabilizer plates, and to investigate twist in extended shear tabs.
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Progress in the development of sour corrosion inhibitors: Past, present, and future perspectives
Bio-Composites,Moses M. Solomon,Saviour A. Umoren,Rami Suleiman,Mohamed Elanany,Nayef M. Alanazi,Ahmad A. Sorour 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.79 No.-
Metallic pipelines and gathering tanks play a vital role during oil and gas exploration, production,transmission, and processing. These facilities are usually attacked by corrosion. The use of corrosioninhibitors is one of the most economical and reliable approaches to control the corrosion of oil and gasmetallic facilities. This paper looks at the progress made in the development of sour corrosion inhibitorsfrom early 1900 to date. Scientific literatures were reviewed. The review identified four classes of organiccorrosion inhibitors for sour environments, namely, amine-based, imidazoline-based, polymer-based,and Gemini-surfactant-based inhibitors. The strengths and weaknesses of these inhibitors werehighlighted. The review revealed that the patronage of amine-based chemistries has declined, and thecurrent technology is based on imidazoline and quaternary salt chemistries. The existing knowledge gapand the future research direction in the area of sour corrosion inhibitors development have beenhighlighted.
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Olatunji Aishat O.,Ayo Joseph O.,Suleiman Mohammed M.,Ambali Suleiman F.,Shittu Muftau,Akorede Ganiu J.,Raji Lukman O.,Atata Jamila A.,Biobaku Khalid T.,Azeez Mistura O. 한국독성학회 2022 Toxicological Research Vol.38 No.3
Alteration of redox status is one of the molecular pathways commonly associated with pesticide toxicity. Antioxidants, including those obtained from plant phenolics, have been shown to mitigate pesticide-induced cellular injury. The present study was aimed at evaluating the effect of daflon-500®, a flavonoid compound on sub-chronic chlorpyriphos-evoked changes in antioxidant and biochemical parameters in the hypophysis and testes of adult male rats. Twenty-five male albino rats were randomly divided into 5 groups of 5 animals each. Group I (DW) received distilled water (2 ml/kg); group II (SO) was dosed with soya oil (2 ml/kg); Group III (DAF) received daflon-500® at 1000 mg/kg ̴ 1/5th of LD50 (≥ 5000 mg/kg); group IV (CP) was administered chlorpyriphos at 7.74 mg/kg ̴ 1/10th of LD50 (77.4 mg/kg) while group V (DAF + CP) was previously treated with daflon-500® (1000 mg/kg) and then exposed to CP (7.74 mg/kg), 30 min later. Daily oral regimen administration was done for 60 days after which the animals were sacrificed by cervical venesection after light chloroform anesthesia. The hypophysis and testicular tissues were harvested, and their homogenates were analyzed for malondialdehyde, catalase and superoxide dismutase, and acetylcholinesterase levels. A significant increase in the hypophysis and testicular MDA concentrations, coupled with a decrease in the SOD, CAT, and AChE activities were observed in the CP group. The levels of these oxidative and biochemical parameters were alleviated in the group pretreated with Daflon-500®. Results of this study demonstrated that pre-treatment with Daflon-500® mitigated CP-induced alterations in oxidative and biochemical parameters apparently due to the antioxidant effect of the flavonoid compound.
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