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| 1 | Clayey soil stabilization using alkali-activated volcanic ash and slag显示文摘Lime and Portland cement are the most widely used binders in soil stabilization projects.However,due to the high carbon emission in cement production,research on soil stabilization by the use of more environmentally-friendly binders with lower carbon footprint has attracted much attention in recent years.This research investigated the potential of using alkali-activated ground granulated blast furnace slag(GGBS)and volcanic ash(VA)as green binders in clayey soil stabilization projects,which has not been studied before.The effects of different combinations of VA with GGBS,various liquid/solid ratios,different curing conditions,and different curing periods(i.e.7 d,28 d and 90 d)were investigated.Compressive strength and durability of specimens against wet-dry and freeze-thaw cycles were then studied through the use of mechanical and microstructural tests.The results demonstrated that the coexistence of GGBS and VA in geopolymerization process was more effective due to the synergic formation of N-A-S-H and C-(A)-S-H gels.Moreover,although VA needs heat curing to become activated and develop strength,its partial replacement with GGBS made the binder suitable for application at ambient temperature and resulted in a remarkably superior resistance against wet-dry and freeze-thaw cycles.The carbon embodied of the mixtures was also evaluated,and the results confirmed the low carbon footprints of the alkali-activated mixtures.Finally,it was concluded that the alkali-activated GGBS/VA could be promisingly used in clayey soil stabilization projects instead of conventional binders. | Hania Miraki Nader Shariatmadari Pooria Ghadir Soheil Jahandari Zhong Tao Rafat Siddique | 2022 | Journal of Rock Mechanics and Geotechnical Engineering2022，14，2： | 5 |
| 2 | Effect of Low Level Subchronic Microwave Radiation on Rat Brain显示文摘Objective The present study was designed to investigate the effects of subchronic low level microwave radiation(MWR) on cognitive function,heat shock protein 70(HSP70) level and DNA damage in brain of Fischer rats.Methods Experiments were performed on male Fischer rats exposed to microwave radiation for 90 days at three different frequencies: 900,1800,and 2450 MHz.Animals were divided into 4 groups: Group I: Sham exposed,Group II: animals exposed to microwave radiation at 900 MHz and specific absorption rate(SAR) 5.953 × 10-4 W/kg,Group III: animals exposed to 1800 MHz at SAR 5.835 × 10-4 W/kg and Group IV: animals exposed to 2450 MHz at SAR 6.672 × 10-4 W/kg.All the animals were tested for cognitive function using elevated plus maze and Morris water maze at the end of the exposure period and subsequently sacrificed to collect brain tissues.HSP70 levels were estimated by ELISA and DNA damage was assessed using alkaline comet assay.Results Microwave exposure at 900-2450 MHz with SAR values as mentioned above lead to decline in cognitive function,increase in HSP70 level and DNA damage in brain.Conclusion The results of the present study suggest that low level microwave exposure at frequencies 900,1800,and 2450 MHz may lead to hazardous effects on brain. | Pravin Suryakantrao Deshmukh Kanu Megha Namita Nasare Basu Dev Banerjee Rafat Sultana Ahmed Mahesh Pandurang Abegaonkar Ashok Kumar Tripathi Pramod Kumari Mediratta | 2016 | Biomedical and Environmental Sciences2016，29，12： | 4 |
| 3 | Use of cement kiln dust in cement concrete and its leachate characteristics显示文摘 | Kunal Rafat Siddique Anita Rajor | 2012 | Resources Conservation & Recycling2012，，： | 2 |
| 4 | Hydrothermal carbonization of agricultural residues:A case study of the farm residues-based biogas plants显示文摘Hydrothermal carbonization(HTC)of biomass is a promising method to produce carbonaceous materials.The work presented in this article addresses the application of hydrothermal carbonization(HTC)to produce a solid fuel named HTC-Biochar,whose characteristics are comparable to lignite coal.Biogas sludge(SD),maize silage(MS),and barley silage(BS)as a substrates were hydrothermally carbonized in a 1.5 L batch reactor at 200C for 6 h.The effect of mixing ratios of different substrates on HTC was investigated.Chemical compositions and combustion characteristics of hydro-chars obtained from mono-and co-carbonization were evaluated.Result showed that HTC increased carbon contents and higher heating values(HHV)by 1.4–14.4%and 13–36%,respectively.The evolution of the H/C and O/C atomic ratios indicated that dehydration and decarboxylation occurred during hydrothermal carbonization for all samples.Furthermore,a significant synergistic enhancement was observed for HHV and carbon content.A mixing ratio of 1:1 for BS and SD showed the best performance for co-HTC.In summary,hydrothermal co-carbonization is a promising strategy to tailor high-performance hydro-char for energy applications. | Samar Seyedsadr Rafat Al Afif Christoph Pfeifer | 2018 | Carbon Resources Conversion2018，1，1： | 2 |
| 5 | Lenalidomide plus high-dose dexamethasone versus lenalidomide plus low-dose dexamethasone as initial therapy for newly diagnosed multiple myeloma: an open-label randomised controlled trial显示文摘 | S Vincent Rajkumar Susanna Jacobus Natalie S Callander Rafael Fonseca David H Vesole Michael E Williams Rafat Abonour David S Siegel Michael Katz Philip R Greipp | 2010 | Lancet Oncology2010，，1： | 2 |
| 6 | Crosswinds effect on the performance of natural draft wet cooling towers显示文摘 | Rafat Al-Waked | 2009 | International Journal of Thermal Sciences2009，，1： | 1 |
| 7 | An integrate drobotie and machine vision system for surface flaw detection and elassifieation 显示文摘 | RAFAT H BOUN S | 1996 | Computers&Industrial Engineering1996，30，1： | 1 |
| 8 | PEG-stabilized carbodiimide crosslinked collagen-chitosanhydrogels for corneal tissue engineering 显示文摘 | Rafat M Li F Fagerholm P Lagali NS Watsky MA Munger R etal | 2008 | Biomaterials2008，29，29： | 1 |
| 9 | Properties of concrete containing scrap-tire rubber-An overview 显示文摘 | RAFAT S TARUN R N | 2004 | Waste Management2004，24，3： | 1 |
| 10 | Hydroxyl radical scavenging activity of flavonoids显示文摘 | RAFAT H S | 1987 | Phytochmistry1987，26，： | 1 |
| 11 | Detection of olive adulteration with some plant oils by GLC analysis of sterols using polar column显示文摘 | KHALIDM A-I ALIK A RAFAT A | 2010 | Food Chemistry2010，12，4： | 1 |
| 12 | Heterocyclizations of pregnenolone :novel synthesis of thiosemicarbazone, thiophene, thiazole, thieno pyridine derivatives and their cytotoxicity evaluations 显示文摘 | RAFAT M M WAGNAT W W GAMAL A E | 2012 | Steroids2012，77，14： | 1 |
| 13 | Properties of concrete containing scrap-tire rubber-an overview显示文摘 | RAFAT S TARUN R N | 2004 | Waste Management2004，，24： | 1 |
| 14 | The role of endothelial progenitor ceils in sepsis显示文摘 | Beck G C Rafat N Yard B | 2007 | Anaesthesist2007，56，5： | 1 |
| 15 | The performance of natural draft dry cooling towers under crosswind:CFD study显示文摘 | RAFAT A MASUD B | 2004 | International Journal of Energy Research2004，28，2： | 1 |
| 16 | Damage in granite under heating/cooling cycles and water freeze–thaw condition显示文摘 | Mokhfi Takarli William Prince Rafat Siddique | 2008 | International Journal of Rock Mechanics and Mining Sciences2008，，7： | 1 |
| 17 | CFD simulation of wet cooling towers 显示文摘 | Al-Waked Rafat Behni Masud | 2006 | Applied Thermal Engineer- ing2006，26，： | 1 |
| 18 | Simultaneous determination of nickel(Ⅱ) and Copper (Ⅱ) by second-derivative spectrophotometric method in micellar media显示文摘 | Pouretedal H R Rafat M | 2007 | J Chin Chem Soc2007，54，： | 1 |
| 19 | Enhancement of methane yield from cotton stalks by mechanical pre-treatment显示文摘Cotton stalks(CS)are lignocellulosic agricultural by-products,a potential source for biogas production,but pretreatment must be considered since hydrolysis is the rate-limiting stage for lignocellulosic biomass substrates.This study investigates the feasibility of mechanical pretreatment of CS to enhance methane production.Batch anaerobic digestion of CS samples with particle sizes ranging from 0.5 to 65 mm was carried out in 1 L eudiometer batch digesters for 48 days at 37◦C.Results showed that methane yield was inversely proportional to particle size,and the quality of biogas was good(54.0-55.2%CH_(4)).Significant increases in methane yield were observed with 20.3%and 26%for samples with a particle size of 3 mm and 0.5 mm,respectively,compared to untreated CS.The coefficient of anaerobic energy turnover was relatively low(20.2-25.5%).Reduction of the CS particle size to 3 mm or less is recommended to achieve effective methane conversion and decrease the retention time in an anaerobic digester from 31 to about 25 days.However,to offset the high energy demand required for grinding,further research should be conducted in combining size reduction with chemical and physicochemical pretreatment. | Rafat Al Afif Christoph Pfeifer | 2021 | Carbon Resources Conversion2021，4，1： | 1 |
| 20 | Single-port laparoscopic splenectomy for idiopathic thrombocytopenic purpura显示文摘 | Rafat Taher Mansour Tawfeeq | | 0，，06： | 1 |
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