Journal of the Association of Arab Universities for Basic and Applied Sciences最新文献_第6页

The effect of ascorbic acid on Bitis arietans venom induced toxicity in rats 抗坏血酸对大鼠黄鼠狼毒液毒性的影响

Journal of the Association of Arab Universities for Basic and Applied Sciences Pub Date : 2017-10-01 Epub Date: 2016-08-28 DOI: 10.1016/j.jaubas.2016.07.004

Abdulrahman K. Al-Asmari , Nasreddien M.A. Osman , Rajamohamed Abbasmanthiri , Sarah A. Al-Asmari

{"title":"The effect of ascorbic acid on Bitis arietans venom induced toxicity in rats","authors":"Abdulrahman K. Al-Asmari , Nasreddien M.A. Osman , Rajamohamed Abbasmanthiri , Sarah A. Al-Asmari","doi":"10.1016/j.jaubas.2016.07.004","DOIUrl":"10.1016/j.jaubas.2016.07.004","url":null,"abstract":"<div><p>Ascorbic acid (AsAc) was tested to evaluate its ability to reverse the oxidative stress induced by envenoming. Test groups of rats were envenomed with sub-lethal doses (4.0mg/kgs.c.) of <em>Bitis arietans</em> venom (BaV) whilst, single doses (500mg/kg, orally) of AsAc were pre-administered in half of them. Blood samples were collected within three periods and levels of lipid peroxidation (LPO) and total-SH increased significantly, whilst, the ‘Venom+AsAc’ groups were significantly less than both, the respective ‘Venom’ groups and controls, at different periods. The antioxidant, superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPx) enzyme level changes were trivial at the three periods, whilst, there were no changes in the ‘Venom+AsAc’ groups, compared with controls, except SOD which, became significant after 24h. SCr and BUN levels were significantly higher than the controls within the three periods with variable degrees, whilst, the ‘Venom+AsAc’ group level changes were insignificant compared with controls and their respective ‘Venom’ groups at all periods. Blood urea Nitrogen (BUN), became significantly lower after 24h. After 6 and 24h AST levels were significantly higher than controls, whilst, ALT was not. Level changes of both AST and ALT ‘Venom+AsAc’ groups were insignificant, compared with controls at all periods. It is concluded that oxidative stress due to envenoming by BaV induced variable levels of significant changes in levels of nephrotoxic, hepatotoxic markers and antioxidant enzyme parameters. Administration of AsAc relatively adjusted these changes with different degrees, at variable periods of time that demands further deeper research in beneficiary mechanisms of antioxidants.</p></div>","PeriodicalId":17232,"journal":{"name":"Journal of the Association of Arab Universities for Basic and Applied Sciences","volume":"24 ","pages":"Pages 89-94"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.jaubas.2016.07.004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87903563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of second-order slip on the flow of a fractional Maxwell MHD fluid 二阶滑移对分数阶Maxwell MHD流体流动的影响

Journal of the Association of Arab Universities for Basic and Applied Sciences Pub Date : 2017-10-01 Epub Date: 2017-05-22 DOI: 10.1016/j.jaubas.2017.04.001

Yaqing Liu , Boling Guo

{"title":"Effects of second-order slip on the flow of a fractional Maxwell MHD fluid","authors":"Yaqing Liu , Boling Guo","doi":"10.1016/j.jaubas.2017.04.001","DOIUrl":"10.1016/j.jaubas.2017.04.001","url":null,"abstract":"<div><p>The magnetohydrodynamic (MHD) flow of a generalized Maxwell fluid induced by a moving plate has been investigated, where the second-order slip between the wall and the fluid in the wall is considered. The fractional calculus approach is used to establish the constitutive relationship model of the non-Newtonian fluid model. Exact analytical solutions for the velocity field and shear stress in terms of Fox H-function are obtained by means of the Laplace transform. The solutions for the generalized Maxwell second-order slip model without magnetic field, the MHD flow of generalized Maxwell flow without slip effects or first-order slip model can be derived as the special cases. Furthermore, the influence of the order of fractional derivative, the magnetic body force, the slip coefficients and power index on the velocity and shear stress are analyzed and discussed in detail. The results show that the velocity corresponding to flows with slip condition is lower than that for flow with non-slip conditions, and the velocity with second-slip condition is lower than that with first-order slip condition.</p></div>","PeriodicalId":17232,"journal":{"name":"Journal of the Association of Arab Universities for Basic and Applied Sciences","volume":"24 ","pages":"Pages 232-241"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.jaubas.2017.04.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75354345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 36

Optimal variational iteration method for nonlinear problems 非线性问题的最优变分迭代法

Journal of the Association of Arab Universities for Basic and Applied Sciences Pub Date : 2017-10-01 Epub Date: 2016-12-18 DOI: 10.1016/j.jaubas.2016.09.004

Syed Tauseef Mohyud-Din, Waseem Sikander, Umar Khan, Naveed Ahmed

引用次数: 15

Semi-analytical method for solving Fokker-Planck’s equations 求解Fokker-Planck方程的半解析方法

Journal of the Association of Arab Universities for Basic and Applied Sciences Pub Date : 2017-10-01 Epub Date: 2017-09-08 DOI: 10.1016/j.jaubas.2017.07.001

Majeed Ahmed AL-Jawary , Ghassan Hasan Radhi , Jure Ravnik

引用次数: 14

Optimal solution of integro-differential equation of Suspension Bridge Model using Genetic Algorithm and Nelder-Mead method 用遗传算法和Nelder-Mead方法求解悬索桥模型的积分-微分方程

Journal of the Association of Arab Universities for Basic and Applied Sciences Pub Date : 2017-10-01 Epub Date: 2017-07-04 DOI: 10.1016/j.jaubas.2017.05.003

Ahmed Zeeshan , M. Atlas

引用次数: 6

The effect of domestication on seed yield, essential oil yield and antioxidant activities of fennel seed (Foeniculum vulgare Mill) grown in Moroccan oasis 驯化对摩洛哥绿洲小茴香种子产量、精油产量和抗氧化活性的影响

Journal of the Association of Arab Universities for Basic and Applied Sciences Pub Date : 2017-10-01 Epub Date: 2017-07-27 DOI: 10.1016/j.jaubas.2017.06.005

Mustapha Abdellaoui , Eimad dine Tariq Bouhlali , Ayoub Kasrati , Lhoucein El Rhaffari

{"title":"The effect of domestication on seed yield, essential oil yield and antioxidant activities of fennel seed (Foeniculum vulgare Mill) grown in Moroccan oasis","authors":"Mustapha Abdellaoui , Eimad dine Tariq Bouhlali , Ayoub Kasrati , Lhoucein El Rhaffari","doi":"10.1016/j.jaubas.2017.06.005","DOIUrl":"10.1016/j.jaubas.2017.06.005","url":null,"abstract":"<div><p>The objective of this study is to clarify, for the first time in Morocco, the impact of culture on seed yield, growth parameters, yield and antioxidant activity of seed essential oils obtained from wild and cultivated fennel. The cultivation test was installed according to the principles of organic agriculture in a parcel at the oasis of Oukhite South East of Morocco under a completely randomized design with three replications. The agro-morphological characteristics were evaluated during two successive years (2014 and 2015). The results showed that fennel produces more of seed and total dry matter under culture conditions and both are more important in second year. The best performance of seed yield and total dry matter are 20.53qx/ha and 199.79qx/ha respectively. Domestication has not improved the yield and the antioxidant activities of fennel seed essential oils. In fact, wild fennel presented an essential oil yield significantly high (3.67%) compared to cultivated fennel (2.13%). For both applied tests DPPH and reducing power, essential oil obtained from wild plant presented the most important antioxidant power (IC<sub>50</sub>:10.62±0.33 and 29.49±0.52mg/mL) compared to that extracted from cultivated plant (IC<sub>50</sub>:13.08±0.34 and 32.30±0.02mg/mL). However, fennel cultivation is promising. It will permit to achieve interesting seed yields and may be good alternative to safeguard this species as well as to be used as an antioxidant natural source.</p></div>","PeriodicalId":17232,"journal":{"name":"Journal of the Association of Arab Universities for Basic and Applied Sciences","volume":"24 ","pages":"Pages 107-114"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.jaubas.2017.06.005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73181198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 20

Three Gemini cationic surfactants based on polyethylene glycol as effective corrosion inhibitor for mild steel in acidic environment 以聚乙二醇为基材的三种Gemini阳离子表面活性剂在酸性环境下对低碳钢的有效缓蚀剂

Journal of the Association of Arab Universities for Basic and Applied Sciences Pub Date : 2017-10-01 Epub Date: 2017-04-29 DOI: 10.1016/j.jaubas.2017.03.004

Ali A. Abd-Elaal, Samy M. Shaban, Salah M. Tawfik

{"title":"Three Gemini cationic surfactants based on polyethylene glycol as effective corrosion inhibitor for mild steel in acidic environment","authors":"Ali A. Abd-Elaal, Samy M. Shaban, Salah M. Tawfik","doi":"10.1016/j.jaubas.2017.03.004","DOIUrl":"10.1016/j.jaubas.2017.03.004","url":null,"abstract":"<div><p>Three Gemini quaternary ammonium surfactants based on polyethylene glycol have been prepared and characterized using FTIR and <sup>1</sup>HNMR spectra. The effect of ethylene oxide units’ number on the steel corrosion in 1.0M HCl has been estimated using weight loss, polarization and electrochemical impedance spectroscopy. The Gravimetric technique has been done at three different temperatures 25, 40 and 55°C. The synthesized Gemini cationic surfactants with the higher molecular weight (higher number of ethylene oxide units) showed the higher inhibition efficiency under all conditions. All the prepared Gemini inhibitors showed higher inhibition efficiency upon raising the solution temperature from 25 to 55°C. The synthesized inhibitor G1500Br showed inhibition efficiency reach to 94% at temperature 55°C. The Langmuir adsorption isotherm is the best-fitted isotherm concerning the tested Gemini surfactants adsorption onto steel surface. The change in the free energy of adsorption refers to physicochemical adsorption on steel surface. The synthesized materials act as a mixed-type inhibitor based on the potentiodynamic polarization results.</p></div>","PeriodicalId":17232,"journal":{"name":"Journal of the Association of Arab Universities for Basic and Applied Sciences","volume":"24 ","pages":"Pages 54-65"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.jaubas.2017.03.004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80338471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 30

Isolation and surface modification of cellulose from underutilized Luffa cylindrica sponge: A potential feed stock for local polymer industry in Africa 从未充分利用的丝瓜海绵中分离和表面改性纤维素:非洲当地聚合物工业的潜在原料

Journal of the Association of Arab Universities for Basic and Applied Sciences Pub Date : 2017-10-01 Epub Date: 2017-01-17 DOI: 10.1016/j.jaubas.2016.12.003

Adewale Adewuyi , Fabiano Vargas Pereira

{"title":"Isolation and surface modification of cellulose from underutilized Luffa cylindrica sponge: A potential feed stock for local polymer industry in Africa","authors":"Adewale Adewuyi , Fabiano Vargas Pereira","doi":"10.1016/j.jaubas.2016.12.003","DOIUrl":"10.1016/j.jaubas.2016.12.003","url":null,"abstract":"<div><p>Cellulose was isolated from <em>Luffa cylindrica</em> sponge (LC) and modified by introducing acetyl ether functionality to its surface via simple reaction mechanism. <em>L. cylindrica</em> cellulose (LCC) and the acetyl ether modified <em>L. cylindrica</em> cellulose (LCS) were characterized using Fourier transformed infrared (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD), particle size distribution, zeta potential, thermogravimetric analysis (TGA) and Brunauer–Emmett–Teller surface area analysis (BET). They were further evaluated for water holding capacity, oil holding capacity, swelling capacity and heavy metal adsorption capacity. LC gave a cellulose yield of 46%. The XRD result revealed LCC and LCS to be typical of cellulose I crystal with LCS exhibiting higher crystallinity than LCC. Hydrophilicity was reduced in LCS with LCC showing higher water holding capacity, oil holding capacity, swelling capacity and heavy metal adsorption capacity. This study showed that surface modification of cellulose with acetyl ether group has the capacity of reducing hydrophilicity in cellulose.</p></div>","PeriodicalId":17232,"journal":{"name":"Journal of the Association of Arab Universities for Basic and Applied Sciences","volume":"24 ","pages":"Pages 39-45"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.jaubas.2016.12.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78934058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Stochastic solution for Cauchy one-dimensional advection model in mean square calculus 均方微积分中柯西一维平流模型的随机解

Journal of the Association of Arab Universities for Basic and Applied Sciences Pub Date : 2017-10-01 Epub Date: 2017-09-08 DOI: 10.1016/j.jaubas.2017.07.002

M.T. Yassen, M.A. Sohaly, I.M. Elbaz

引用次数: 3

Hall and ion slip effects on mixed convection flow of nanofluid between two concentric cylinders 两个同心圆柱体间纳米流体混合对流的霍尔和离子滑移效应

Journal of the Association of Arab Universities for Basic and Applied Sciences Pub Date : 2017-10-01 Epub Date: 2017-04-25 DOI: 10.1016/j.jaubas.2017.03.002

D. Srinivasacharya, Md. Shafeeurrahman

引用次数: 36