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RISS 인기검색어
- 검색키워드
- 저자 : E.A. Al-Harbi (검색결과 4 건)
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M.S. El-Shahawi,H. Alwael,A. Arafat,A.A. Al-Sibaai,A.S. Bashammakh,E.A. Al-Harbi 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.28 No.-
A fast and selective method for cadmium(II) removal from water by procaine hydrochloride (PQ+ Cl )immobilized polyurethane foam (PUFs) sorbent was developed. The method was based upon formationof [CdI4] 2aq in the test aqueous KI solution and subsequent extraction by PQ+ Cl treated PUFs. Thesorption of Cd2+ ions followed first order equation with an overall rate constant of 0.132 0.033 min 1. The values of DH and DS were 41.54 0.9 kJ mol 1 and 144.58 3.1 J mol 1 K 1, respectively with acorrelation factor of 0.998. The thermodynamic parameters (DH, DS and DG) suggest that the sorption wasspontaneous and exothermic process. The negative value of DS provides indication of moderate sorption of[CdI4]2 ion associate and ordering of the ionic charges without compensatory disordering of the sorbedspecies onto the sorbent. Cadmium(II) sorption is mainly dominated by absorption related to ‘‘solventextraction’’ and an added component for ‘‘surface adsorption’’. PQ+ Cl treated PUFs packed column was alsotested for preconcentration of trace concentrations of cadmium(II) species in various water samples. Theretained Cd species were successfully recovered with dilute HNO3 (1.0 mol L 1) and subsequently analyzedby ICP–OES. Thus, the proposed sorbent packed column provides efficient removal of traces of cadmium(II)ions from water samples. The method could be extended for preconcentrate of trace and ultra trace cadmiumspecies from large samples onto PUF packed column and subsequently analyzed. Indeed, the developedmethod could be satisfactorily applied to the determination of trace Cd ions in natural water.
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Mahmoud, Ayman M.,Alqahtani, Sultan,Othman, Sarah I.,Germoush, Mousa O.,Hussein, Omnia E.,Al-Basher, Gadh,Khim, Jong Seong,Al-Qaraawi, Maha A.,Al-Harbi, Hanan M.,Fadel, Abdulmannan,Allam, Ahmed A. Hindawi 2017 Oxidative medicine and cellular longevity Vol.2017 No.-
<P>Hyperammonemia is a serious complication of liver disease and may lead to encephalopathy and death. This study investigated the effects of <I>Commiphora molmol</I> resin on oxidative stress, inflammation, and hematological alterations in ammonium chloride- (NH<SUB>4</SUB>Cl-) induced hyperammonemic rats, with an emphasis on the glutamate-NO-cGMP and Nrf2/ARE/HO-1 signaling pathways. Rats received NH<SUB>4</SUB>Cl and <I>C. molmol</I> for 8 weeks. NH<SUB>4</SUB>Cl-induced rats showed significant increase in blood ammonia, liver function markers, and tumor necrosis factor-alpha (TNF-<I>α</I>). Concurrent supplementation of <I>C. molmol</I> significantly decreased circulating ammonia, liver function markers, and TNF-<I>α</I> in hyperammonemic rats. <I>C. molmol</I> suppressed lipid peroxidation and nitric oxide and enhanced the antioxidant defenses in the liver, kidney, and cerebrum of hyperammonemic rats. <I>C. molmol</I> significantly upregulated Nrf2 and HO-1 and decreased glutamine and nitric oxide synthase, soluble guanylate cyclase, and Na<SUP>+</SUP>/K<SUP>+</SUP>-ATPase expression in the cerebrum of NH<SUB>4</SUB>Cl-induced hyperammonemic rats. Hyperammonemia was also associated with hematological and coagulation system alterations. These alterations were reversed by <I>C. molmol</I>. Our findings demonstrated that <I>C. molmol</I> attenuates ammonia-induced liver injury, oxidative stress, inflammation, and hematological alterations. This study points to the modulatory effect of <I>C. molmol</I> on glutamate-NO-cGMP and Nrf2/ARE/HO-1 pathways in hyperammonemia. Therefore, <I>C. molmol</I> might be a promising protective agent against hyperammonemia.</P>
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M.S. El-Shahawi,A.S. Bashammakh,M.I. Orief,A.A. Al-Sibaai,E.A. Al-Harbi 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.1
The sorption profile of cadmium (II) ions from aqueous iodide media onto procaine hydrochloride(PQ+ㆍCl-) treated polyurethane foams (PUFs) solid sorbent was studied. PQ+ㆍCl- treated PUFs solidsorbent was found suitable and fast for Cd2+ uptake as [CdI4]aq2-. Thus, removal of Cd2+ at trace levels bythe sorbent packed columns was achieved. The sorbed Cd2+ species onto packed column were recoveredwith HNO3 (10.0 mL, 1.0 mol L-1) prior determination by inductively coupled plasma-optical emissionspectrometry (ICP-OES). Plot of Cd2+ ions concentration was linear in the range 0.05–15 mg L-1. Thelimits of detection and quantification of Cd2+ were found 0.01 mg L-1 and 0.033 mg L-1, respectively. Such limits could be improved to lower values by retention of Cd2+ species from large sample volumes ofthe aqueous phase at the optimized conditions. The relative standard deviation of the packed column forthe extraction and recovery of standard aqueous solutions (0.1 L) containing 1.0 and 5.0 mg L-1 (n = 3) ofCd2+ ions at flow rate of 5.0 mL min-1 were 1.98 and 2.9%, respectively. The method was validated byanalysis of Cd in certified reference materials (CRMs) IAEA-Soil-7 and TMDW water and wastewatersamples.
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Samir A. El-Shazly,Mohamed M. Ahmed,Mohammad S. AL-Harbi,Mohamed E. Alkafafy,Hanan B. El-Sawy,Sayed A. M. Amer 한국식품과학회 2018 Food Science and Biotechnology Vol.27 No.5
The present study was performed to assess antiobesity effects of raw pineapple juice in high fat diet (HFD)-induced fatness. Based on food type, rats were divided into normal diet and HFD groups. When animals of HFD group become obese, they were given pineapple juice along with either HFD or normal diet. Blood biochemistry, liver and muscle gene expressions were analyzed. HFD induced significant elevations in body weight, body mass index (BMI), body fat accumulation, liver fat deposition and blood lipids while juice restored these parameters near to their normal values. Juice significantly decreased serum insulin and leptin while adiponectin was increased. Juice administration downregulated the increment of FAS and SERBP-1c mRNA expression in liver and upregulated HSL and GLUT-2 expressions. The muscular lipolytic CPT-1 expression was upregulted by juice treatment. Pineapple juice, therefore, may possibly be used as anti-obesity candidate where it decreased lipogenesis and increased lipolysis.
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