Papers by Asif Ahmed Shaikh
RSC Advances, 2021
Study investigated single element noble metal nanoparticle shape-dependent ROS generation and qua... more Study investigated single element noble metal nanoparticle shape-dependent ROS generation and quantification, and investigated selective ROS species action on microbes.
Optimisation of Biomethane Production Admixing Organic Fraction of Municipal Solid Waste and Sewage Sludge
Optimisation of biomethane production was carried out using the co-blended organic fraction of mu... more Optimisation of biomethane production was carried out using the co-blended organic fraction of municipal solid waste (OFMSW) and sewage sludge (SS). The co-blending was evaluated at a range of carbon to nitrogen ratios (C:N) using a standard biochemical methane potential (BMP) test. OFMSW has a very high C:N ratio of around 30 and is predominantly carbon whereas by contrast, waste activated sludge has a low ratio of around 4.9 and comprises nitrogen. Co-blending of OFMSW with the thickened sludge from wastewater increases both the amount and the methane produced during anaerobic digestion. The optimum blend occurs at a C:N ratio of 15 which is achieved with 30% of organic fraction of municipal solid waste. The highest methane yield of 161 mL/gVSremoved was also observed at C:N 15. The highest destruction of volatile solids of 85% was achieved at C:N of 20 followed by C:N 30 and 15. No inhibition was observed by ammonia at any C:N ratio’s
8th International Conference on Higher Education Advances (HEAd'22)
This article presents a framework for the implementation of Quality 4.0 aspect in the higher educ... more This article presents a framework for the implementation of Quality 4.0 aspect in the higher education institute. Quality 4.0 is a major domain of Industry 4.0 revolution. Beside the industry, educational institutes are also embracing the new technology-based framework, which does not only revolutionize the educational system, but also impact their performance.In this research, a comprehensive framework for the implementation of Quality 4.0 is presented. The enablers and the components of Quality 4.0 are discussed in detail. The article also discusses the implementation of the framework, consisting of big data analysis, SWOT analysis of the institute, implementation of documentation, digitalization and record management, ERP system and finally the key performance indicators (KPIs).The framework is specially designed for the higher education institute for the consistency and standardization, through the latest technology and digitization.
Materials for Renewable and Sustainable Energy, 2022
Rechargeable batteries have gained a lot of interests due to rising trend of electric vehicles to... more Rechargeable batteries have gained a lot of interests due to rising trend of electric vehicles to control greenhouse gases emissions. Among all type of rechargeable batteries, lithium air battery (LAB) provides an optimal solution, owing to its high specific energy of 11,140 Wh/kg comparable to that of gasoline 12,700 Wh/kg. However, LABs are not widely commercialized yet due to the reactivity of the lithium anode with the components of ambient air such as moisture and carbon dioxide. To address this challenge, it is important to understand the effects of moisture on the electrochemical performance of LAB. In this review, the effects of ambient air on the electrochemical performance of LAB have been discussed. The literature on the deterioration in the battery capacity and cyclability due to operation in ambient environment and degradation of lithium anode due to exothermic reaction between lithium and water is reviewed and explained. The effects of using oxygen-selective membrane (...
入退院を繰り返す統合失調症患者の看護--心理社会的様式のアセスメントからの再構成 (日本適応看護理論研究会第3回学術集会)
Implementation of Risk Management System to Improve the Quality of Higher Education Institutes
World Academy of Science, Engineering and Technology, International Journal of Educational and Pedagogical Sciences, 2018
女性に対して妄想を抱く統合失調症患者の看護 (日本適応看護理論研究会 第4回学術集会)
Materials Science, 2021
Concrete structural properties are compromised largely due to corrosion susceptibility of steel r... more Concrete structural properties are compromised largely due to corrosion susceptibility of steel reinforcements. This results in weakening and eventual failure of structures. Several strategies have been employed in past to control corrosion and increase mechanical strength of concretes, in particular for structural applications. In this study, fly ash and polypropylene fibers were utilized as the admixtures for preparation of concrete blocks with variable water-cement (w/c) ratios i.e. 0.45, 0.5 and 0.65. Three different grades of cements were selected in this study namely OPC 43, OPC 53 and sulfate resistant one. Also, two different steel alloys were used i.e. ASTM-615 and ASTM-706, since both of them are very common reinforcement materials (rebars). The curing time of 56 consecutive days was employed before testing and characterization. The results suggest remarkable improvement in the mechanical properties of blocks upon the incorporation of admixtures. However, rebars exhibited ...
Materials Science, 2021
An attempt has been made in the present research work to investigate the role and influence of ch... more An attempt has been made in the present research work to investigate the role and influence of chemical effect of aluminum addition in the experimental steel towards the formation of k-carbides. Two steel grades were made with and without aluminum addition by induction melting furnace and were cast to ingots. Steel A has no aluminum addition and steel B has some aluminum content. These ingots were then solution heat treated on a temperature of 1200°C for 2-hours’ time and were cooled in the air. After that, they were hot rolled to drawn in plate and sheet. The small samples were cut from bulk and were then heat-treated at 800°C for 1 hour and quenched. Microstructure by OM and SEM was captured. In steel A there was no k-carbide present in the matrix and surprisingly in steel B, small fine k-carbides were present this was then confirmed by XRD later. OM, SEM, and TEM analysis revealed that the presence of k-carbides in steel B makes less dense. It was concluded that aluminum in conju...
Korean Journal of Materials Research, 2021
The oxidation resistance of the diffusion aluminide bond coat (BC) is compromised largely by inte... more The oxidation resistance of the diffusion aluminide bond coat (BC) is compromised largely by interdiffusion (ID) effects on coated turbine blades of aeroengines. The present study is designed to understand the influence of ID on βNiAl coatings or BC. In this regard, nickel substrate and CMSX-4 superalloy are deposited. In total, four sets of BCs are developed, i.e. pure βNiAl (on Ni substrate), simple βNiAl (on CMSX-4 substrate), Zr-βNiAl (on CMSX-4 substrate) and Pt-βNiAl (on CMSX-4 substrate). The main aim of this study is to understand the interdiffusion of Al, Zr and Pt during preparation and oxidation. In addition, the beneficial effects of both Zr and platinum are assessed. Pure βNiAl and simple βNiAl show Ni-outdiffusion, whereas for platinum inward diffusion to the substrate is noticed under vacuum treatment. Interestingly, Zr-βNiAl shows the least ID in all BCs and exhibit stability under both vacuum and oxidation treatments. However, its spallation resistance is slightly lower than that of Pt-βNiAl BC. All BCs show similar oxide growth trends, except for Zr-βNiAl, which exhibits two-stage oxidations, i.e. transient and steady-state. Moreover, it is suggested that the localized spallation in all BCs is caused by βNiAl -γ'-Ni 3 Al transformation.
Journal of Mining and Metallurgy, Section B: Metallurgy, 2021
Platinum-modified-?NiAl is a bond coat (BC) material for thermal barrier coatings (TBCs) applicat... more Platinum-modified-?NiAl is a bond coat (BC) material for thermal barrier coatings (TBCs) applications applied on aero-engine hardware to reduce their surface temperatures. However, it is desirable to minimize its production and material costs by the low-cost alternatives of similar performance. As, it has been acknowledged that the small concentration of the reactive elements (REs), such as Zr, Hf, and Y, could tremendously enhance the oxide adhesion even in some cases better than Pt modified counterparts. The present study aims to design and fabricate the Zr-modified-?NiAl bond coat on CMSX-4 superalloy using an aluminizing method. Moreover, the study focuses on the development of a systematic understanding of underlying mechanisms behind the beneficial effects of REs. Initially, three sets of BCs were prepared: Zr-free ?NiAl (undoped), Al and Zr co-deposited in a single-step process (1SP), and Zr and Al, which were individually deposited in two processing steps (2SP): zirconizing ...
Materials, 2022
Most of the food packaging materials used in the market are petroleum-based plastics; such materi... more Most of the food packaging materials used in the market are petroleum-based plastics; such materials are neither biodegradable nor environmentally friendly and require years to decompose. To overcome these problems, biodegradable and edible materials are encouraged to be used because such materials degrade quickly due to the actions of bacteria, fungi, and other environmental effects. In this work, commonly available household materials such as gelatin, soy protein, corn starch, and papaya were used to prepare cost-effective lab-scale biodegradable and edible packaging film as an effective alternative to commercial plastics to reduce waste generation. Prepared films were characterized in terms of Fourier transform infrared spectroscopy (FTIR), water vapor transmission rate (WVTR), optical transparency, and tensile strength. FTIR confirmed the addition of papaya and soy protein to the gelatin backbone. WVTR of the gelatin-papaya films was recorded to be less than 50 g/m2/day. This wa...
Journal of natural disaster science, 2005
Natural disasters are inevitable and it is almost impossible to fully prevent the damage that the... more Natural disasters are inevitable and it is almost impossible to fully prevent the damage that they cause. However, it is possible to reduce the potential risk by developing disaster early warning strategies and to help in rehabilitation and post disaster reduction. Remote sensing technology has proven its usefulness, not only for monitoring disastrous events, but also to provide accurate and timely information well before the occurrence of a disaster. The study of the temporal changes of spatial patterns is important to understand the underlying factors and the functional effects. This paper addresses a multi-temporal analysis of land cover changes from 1986 to 2000 in Nagasaki City. Nagasaki City was studied using Thematic Mapper (TM) data acquired by Landsat-5. Particular attention is given to the selection of an appropriate method for land cover classification. A common and reputable unsupervised classification method, the Iterative Self-Organizing Data Analysis Technique (ISODATA) is used. The overall results of the study area show that the amounts of forestland and agricultural land are decreasing and in contrast the amounts of urban land and barren land are increasing. This trend is especially clear in detailed analysis of typically developed areas such as Tagonoura, Koebaru and Kaminoshima.
Environmental Pollutants and Bioavailability
A microbiological and sanitation survey of ready-to-eat (RTE) food samples, cutlery, utensils, an... more A microbiological and sanitation survey of ready-to-eat (RTE) food samples, cutlery, utensils, and hands of food handlers, food preparation surfaces, serving counters, washing areas, and refrigerator handles were conducted. The samples were collected using environmental swabs, and these samples were analyzed using standard plating techniques. Samples were characterized after aerobic plate counts (APC) and isolated for mesophilic aerobic bacteria (MAB), total coliforms, Staphylococcus aureus, Escherichia coli., Salmonella spp., Shigella spp., Pseudomonas spp., Enterobacter spp., Klebsiella spp., and yeast. This study suggested that good-hygiene practices can minimize bacterial counts, thereby decreasing the reservoirs for bacterial contamination. It also improves the hygienic condition of RTE-foods in the cafeteria of Universities.
Journal of the Japan Society of …, 2007
Abstract; Metropolitan cities grow beyond imaginable proportions, particularly in the developing ... more Abstract; Metropolitan cities grow beyond imaginable proportions, particularly in the developing world. Urban issues therefore warrant-and receive-increasing attention. This paper summarizes the general pattern of urban land-cover changes in Karachi, Pakistan ...
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Papers by Asif Ahmed Shaikh