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Mukundan D.,Crescent University | Mohankumar R.,SRM University | Vasanthakumari R.,Crescent University
Bulletin of Materials Science | Year: 2017

Nanotechnology is an emerging field in science and technology, which can be applied to synthesize new materials at the nanoscale level. The present investigation aimed at comparing the synthesis, characterization and in vitro anticancer efficacy of synthesized silver and gold nanoparticles using leaves extract of Bauhinia tomentosa Linn. Silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs) were synthesized using aqueous extract of leaves with solution of silver nitrate (AgNO3, 1mM) and chloroauric acid (HAuCl4·3H2O, 1mM), respectively. The synthesized nanoparticles were characterized using UV-visible spectrophotometry, Fourier transform infrared spectroscopy, field emission scanning electron microscopy, high-resolution transmission electron microscopy, energy-dispersive analysis of X-rays, X-ray diffraction, thermogravimetric analysis and cyclic voltammetry, which confirmed the reduction of Ag+ ions to Ag0 and Au3+ ions to Au0. The in vitro anticancer efficacy of AgNPs, AuNPs and aqueous extract of leaves confirmed by MTT assay exhibited IC50 concentrations of 28.125, 46.875 and 50 μgml-1 for lung A-549 cells, 103.125, 34.375 and 53.125 μgml-1 for HEp-2 cells and 62.5, 23.4 and 13.26 μgml-1 for MCF-7 cells, respectively. The concentrations indicate that both silver and gold nanoparticles as well as aqueous extract of leaves exhibited high anticancer efficacy.

Gulzar Z.,Crescent University | Anny Leema A.,Crescent University
Journal of Advanced Research in Dynamical and Control Systems | Year: 2017

Having a plan for higher education is important, and it can be frustrating for students if they do not have proper tools that will help them in planning and organize their work. The study is based on the Seven Step Methodology that was used to Structure our proposed Ontology development process. The aim of this study is to understand the development of a knowledge model for better understanding of a domain and the courses it includes using protégé tool. Almost 200 Different Subjects from the School of Computer Sciences at BSA University was chosen as an example for the development of Ontology. Before Categorization of the Concepts for a particular domain, a thorough study was conducted by using University Syllabus, Books, and Some Experts also. Different Ontologies for many domains exist but their educational context in not clear as far as quality and stability is concerned, and for numerous domains and subjects do not exist all. Therefore, Ontology building can prove helpful in providing the content in an efficient and effective manner to improve the interest of a learner. The Ontology aims to help scholars and researchers to plan their course work by providing some graphical representation of the domain courses, and how these courses are related together within a particular domain or with other domains. With the help of Ontology, we can focus mainly on the concepts in a domain and their relationship rather than Information alone. The reusability saves the time for domain experts and they can make use of already built ontology. The main goal is to build Ontology to help in personalization by providing the content in an efficient and effective manner to improve the performance and interest of a learner. Various aspects concepts, class hierarchy, object properties, data properties, Creating Instances, query retrieval process and graphical visualization have been demonstrated. © 2017, Institute of Advanced Scientific Research, Inc. All rights reserved.

Edeki S.O.,Covenant University | Akinlabi G.O.,Covenant University | Adeosun S.A.,Crescent University
AIP Conference Proceedings | Year: 2016

In this paper, a proposed semi-Analytical method referred to as modified transformation Method resulting from the modification of the classical Differential Transformation Method (DTM) is applied to linear Schrödinger Equations. The results obtained converge faster to their exact forms. Illustrative examples are used and the results show that this modified version is very efficient, reliable and better than the classical DTM and other semi-Analytical methods, as less computational work is involved. Hence, it is strongly recommended for both linear and nonlinear partial differential equations (PDEs) and stochastic differential equations (SDEs). © 2016 AIP Publishing LLC.

Wani P.A.,Crescent University | Khan M.S.,Aligarh Muslim University
Bulletin of Environmental Contamination and Toxicology | Year: 2013

Pollution of the biosphere by heavy metals is a global threat that has accelerated dramatically since the beginning of industrial revolution. The aim of the study is to check the resistance of RL9 towards the metals and to observe the effect of Rhizobium species on growth, pigment content, protein and nickel uptake by lentil in the presence and absence of nickel. The multi metal tolerant and plant growth promoting Rhizobium strain RL9 was isolated from the nodules of lentil. The strain not only tolerated nickel but was also tolerant o cadmium, chromium, nickel, lead, zinc and copper. The strain tolerated nickel 500 μg/mL, cadmium 300 μg/mL, chromium 400 μg/mL, lead 1,400 μg/mL, zinc 1,000 μg/mL and copper 300 μg/mL, produced good amount of indole acetic acid and was also positive for siderophore, hydrogen cyanide and ammonia. The strain RL9 was further assessed with increasing concentrations of nickel when lentil was used as a test crop. The strain RL9 significantly increased growth, nodulation, chlorophyll, leghaemoglobin, nitrogen content, seed protein and seed yield compared to plants grown in the absence of bioinoculant but amended with nickel The strain RL9 decreased uptake of nickel in lentil compared to plants grown in the absence of bio-inoculant. Due to these intrinsic abilities strain RL9 could be utilized for growth promotion as well as for the remediation of nickel in nickel contaminated soil. © 2013 Springer Science+Business Media New York.

Wani P.A.,Crescent University | Khan M.S.,Aligarh Muslim University
Pakistan Journal of Biological Sciences | Year: 2014

Heavy metal contamination has accelerated due to the rapid industrialization world wide. Accumulation of metals in excess can modify the structure of essential protein or can replace an essential element. Bradyrhizobium strains showed tolerance to cadmium, chromium, nickel, lead, zinc and copper. All the isolates showed maximum tolerance towards lead and zinc which was followed by nickel and chromium. These strains also showed tolerance towards most of the antibiotics. Bradyrhizobium strains were also tested for their Plant Growth Promoting (PGP) substances, all isolates produced good amount of indole acetic acid and were positive for ammonia but only three strains were positive for HCN and siderophore (RM1, RM2 and RM8), the rest isolates showed negative result. Based on the above intrinsic abilities of Bradyrhizobium species, these strains can be used for the growth promotion, as well for the detoxification of the heavy metals in metal polluted soils. © 2014 Asian Network for Scientific Information.

Wani P.A.,Crescent University | Khan M.S.,Aligarh Muslim University
Food and Chemical Toxicology | Year: 2010

Pollution of the agricultural land by the toxic chromium is a global threat that has accelerated dramatically since the beginning of industrial revolution. Toxic chromium affects both the microbial diversity as well as reduces the growth of the plants. Understanding the effect of the chromium reducing and plant growth promoting rhizobacteria on chickpea crop will be useful. Chromium reducing and plant growth promoting Bacillus species PSB10 significantly improved growth, nodulation, chlorophyll, leghaemoglobin, seed yield and grain protein of chickpea crop grown in the presence of different concentrations of chromium compared to the plants grown in the absence of bio-inoculant. The strain also reduced the uptake of chromium in roots, shoots and grains of chickpea crop compared to plants grown in the absence of bio-inoculant. This study thus suggested that the Bacillus species PSB10 due to its intrinsic abilities of growth promotion and attenuation of the toxic effects of chromium could be exploited for remediation of chromium from chromium contaminated sites. © 2010 Elsevier Ltd.

Baoku I.G.,Crescent University | Israel-Cookey C.,Rivers State University of Science And Technology | Olajuwon B.I.,Abeokuta Federal University of Agriculture
Journal of Applied Fluid Mechanics | Year: 2012

The paper examines transient MHD Couette flow of an electrically conducting fluid in the presence of an applied transverse magnetic field and thermal radiation through a porous medium. The dimensionless governing equations of the flow are coupled non-linear partial differential equations and are solved by an efficient and unconditionally stable finite difference scheme of Crank-Nicolson type. The influence of the medium permeability is also assessed. The velocity and temperature profiles for the flow are studied for various interesting parameters of Prandtl number, Nahme number and Hartmann number, and are presented graphically. The results show that the thermal radiation has appreciable influence on the flow.

Alegbeleye W.O.,Abeokuta Federal University of Agriculture | Obasa S.O.,Abeokuta Federal University of Agriculture | Olude O.O.,Abeokuta Federal University of Agriculture | Otubu K.,Abeokuta Federal University of Agriculture | Jimoh W.,Crescent University
Aquaculture Research | Year: 2012

A preliminary feeding trial was conducted to evaluate the nutritive value of adult variegated grasshopper (Zonocerus variegatus) meal (VGM) as a replacement for fish meal in the diets of Clarias gariepinus fingerlings. Proximate analysis result showed that VGM had 61.50% crude protein, 6.87% crude lipid, 27.33 NFE and 9.35% chitin. Five isonitrogenous (30%) and isoenergetic (18.42MJkg -1) diets were formulated in which VGM progressively replaced fishmeal at five inclusion levels (0%, 25%, 50%, 75% and 100%). The best performance in terms of % weight gain was observed in the group of fish fed ED 1 (25% inclusion level) and was not significantly different (P>0.05) from the groups fed the control diet. Weight gain and specific growth rate were significantly lower (P<0.05) in the group fed ED 4 (100%VGM). Feed conversion ratio and protein efficiency ratio were numerically but not significantly different (P>0.05) among the different groups. The results indicate that apparent protein and lipid digestibility were high at all levels, although there were decreases with an increase in the inclusion levels. Carcass lipid decreased with an increase in the inclusion level of VGM. The VGM can replace fish meal up to 25% in the diets of C. gariepinus fingerlings without any adverse effect on growth and nutrient utilization. © 2011 Blackwell Publishing Ltd.

Maskooki A.,Asian Institute of Technology | Mortazavi S.A.,Ferdowsi University of Mashhad | Maskooki A.,Crescent University
Desalination | Year: 2010

Cleaning effects of ultrasound and alkaline solution of EDTA individually and together on spiralwound ultrafiltration membrane were studied. Several frequencies of 28, 45 and 100 kHz and alternative waveforms of ultrasound, alkaline solutions of EDTA (pH 11, 1 mM and 3 mM) as well as their interaction effects were used as cleaning agents of spiralwound membranes that fouled using 1% solution of skim milk. The flux recovery and hydrodynamic resistance of each treated membrane were measured during and after cleaning process and cleaning efficiency of each factor was also calculated during various time intervals on treated membranes. The obtained data statistically analyzed in ANOVA table using multifactor design. The overall results showed that the cleaning efficiency of each treatment including different frequencies of ultrasound and alkaline solutions of EDTA individually is relatively low. However, the cleaning efficiency of ultrasound and EDTA increased when applied altogether. The maximum cleaning effects were obtained in the first seconds and after 5 min and additional cleaning process were not necessary. The best results were obtained when mixed waveform of ultrasound and 3 mM EDTA were used together. This effect may be due to a synergistic sonochemical effect of ultrasound and EDTA as cleaning factors. © 2010 Elsevier B.V.

Jimoh W.A.,Crescent University | Aroyehun H.T.,Crescent University
Turkish Journal of Fisheries and Aquatic Sciences | Year: 2011

A 56-day feeding trial was conducted to assess the replacement value of cooked and mechanically defatted sesame seed meal as dietary replacement of soybean meal in diets of Clarias gariepinus. All diets were prepared to be isonitrogenous, (40% crude protein), isolipidic (12% lipid) and isoenergetic (18 Mj/g). Cooked and mechanically defatted sesame seed meals were used to replace soybean meal at a rate of 0, 25, 50, 75, 100% respectively. The performance of the fish fed sesame seed meal-based test diets was compared to fish fed a soybean meal-based control diets containing 40% crude protein. Each treatment had three replicates using 15 catfish fingerlings per tank with mean initial body weight of 6.37±0.21 g. There was no significant difference (P>0.05) in protein productive value, feed intake; specific growth rate, % weight gain and crude deposition between fish fed control diets and fish fed diets containing 25% sesame. Similarly there was no significant difference (P>0.05) in protein productive value, feed intake; specific growth rate, % weight gain and crude deposition between fish fed fish fed diets containing 25% sesame and fish fed diets containing 50% sesame. However, a significant difference (P<0.05) was recorded between fish fed control diets and fish fed other test diets using the above indices. Comparable performance in growth nutrient utilization and carcass crude protein deposition in Clarias gariepinus fed diets with SSM25 and SSM50 showed that these meals could be viable means of improving the cost of fish feeding. © Published by Central Fisheries Research Institute (CFRI) Trabzon, Turkey.

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