Volume-11 ~ Issue-9 ~ September-2018

Abstract: Characterization of waste Aluminium dross for recovery of metal and other valuable elements are very important for secondary processing industries. Metallic impurity was determined using both classical and ICP-AES. Sample preparation plays key role in accurate quantitative determinations as it is a heterogeneous material. Different sample size (10 to 50 g) were taken for the analysis of metal and other impurities such as Fe, Ti, Ca, Mg, V, P, Cu, Mn, Na, Ni, Zn etc. The percentage of metallic Aluminium was obtained to be 20-21 % and alumina was around 70 %. In the present paper, sample preparation methodology, equipment operating condition optimization, comparative analysis using both classical and ICP-AES has been studied. Precision of measurement in the dross samples were achieved to be less than 5 % RSD.

Keywords: ICP-AES, Aluminium dross, Alumina

[1]. Gary D. Christian, Analytical Chemistry, 6th edition, Edited by Gary D. Christian, John Wiley & Sons (ASIA) Pte Ltd. 2003, p.457.
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[3]. David J. Roth, History and Future of Dross Processing,Light Metal, 2015, p. 1005-1009
[4]. Upendra Singh, M. S. Ansari, S. P. Puttewar and A. Agnihotri, Studies on Process for Conversion of Waste Aluminium Dross into Value Added Products, Russian Journal of Non-Ferrous Metal, 2016 Vol. 57, p. 296-300
[5]. J. Mukhopadhyay, Y. V. Ramana and Upendra Singh, Extraction of Value Added Products from Aluminium Dross Material to Achieve Zero Waste, Light Metal, 2004, p. 1209.

Abstract: Quality control (QC) is one of the most important impacts on laboratory testing—it ensures both precision and accuracy of patient sample results. The integrity of quality control samples is important to both management of overall quality as well as to meeting requirements of proficiency testing.The study was done to assess the quality control monitoring and evaluation of triglycerides & Cholesterol and also for inter-laboratory studies of somehaematological parameters[ Whiteblood cell (WBC),Red blood cell (RBC)andHeamoglobin (Hgb), in Nisa Premier Hospital Abuja and the Benue State University Teaching Hospital Makurdi,North central Nigeria.The quality control monitoring& evaluation of Triglycerides and cholesterol were conducted for..........

Keywords: Quality Control, Triglycerides, Cholesterol,Inter-laboratory,Westgard Rule

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Abstract: A Chiral high-performance liquid chromatographic (HPLC) method was developed and validated for the enantiomeric separation of glycidyl butyrate and the quantification of S (+)-glycidyl butyrate. Separation was achieved on Chiralcel OD-H (250 × 4.6mm, 5μ) column using a mixture of Hexane: 2-Propanol (100:1, v/v) as a mobile phase with flow rate of 1.0 mL/min on UV detector. The resolution between S (+)-glycidyl butyrate (SGB) and R (-)-glycidyl butyrate (RGB) enantiomers was found to be more than 2. The proposed method was validated with respect to linearity, precession, accuracy, limit of detection (LOD), limit of quantitation (LOQ) and robustness. The SGB showed an excellent linearity over the concentrations range from 2 to 24 μg/mL, while the mean recovery..........

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Abstract: 4-nitro benzene diazoniumsulphatewas prepared by the diazotization reaction of 4-nitro aniline with sodium nitrite and concentrated sulphuric acid at 00c.Thenthe diazonium salt was coupled with 3-amino-9-ethyl carbazole dissolved in acetic acid at 00c.The obtained azodye namely 4-azo-(4'-nitro-1'-phenyl) 3-amino-9-ethyl carbazole was purified and characterized by IR,UV and NMR spectroscopy. 2-methacryloyl-3-(4-azo-4'-nitro-1'-phenyl) amino-9-ethyl carbazole was synthesized by the reaction of 4-azo-(4'-nitro-1'-phenyl)-3- amino-9-ethyl carbazole with methacryloyl chloride in the solvent medium of THF under stirring for 50h.Lastly,the polymer was synthesized by the radical polymerization of 2-metharyloyl-3(4-azo-4'-nitro-1'-phenyl)-3-amino-9-ethyl carbazole with methylmethacrylate by using AIBN as radical initiator under stirring at 1100c in the solvent medium of DMF for 80h. All the monomers and polymer was characterized by IR,UV and NMR spectroscopy.

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Abstract: Density and viscosity studies of sucrose in aqueous medium and in non aqououes 5% ,10 % ethanol -water medium were measured at 313.15 K. The concentration ranges were 0.1-0.9 M. The results obtained from volumetric and viscometric studies measurement have been utilized to calculate the Falkenhagen coefficient A and Jones-Dole coefficient B. Each data are interpreted in the light of solute-solvent and solute-solute interactions.

Keyword :- Sucrose, Ethanol, Water,density, viscosity,jones-Dole coeff.B,Falkenhagen coeff.A.

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Abstract: Nanotechnology is an advanced technology that has gained much attention, due to their considerably small size and remarkable properties. Nanomaterials with their unique structural properties offer many advantages such asgreater surface area, excellent adsorption capability and high selectivity. These exceptional properties make them preferable to be used as solid phase extractant for the removal of toxic metal ions, which have adverse effect on human health. Lead is one of the most toxic metal ions as even its trace concentration possesses risk to humans and other organisms. Since it is usually present in environmental samples in very low concentration, its direct determination..........

Keyword :- Flow-injection, Hyphenated, Lead, Nanomaterials, Solid phase extraction,Singular.

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Abstract: A facile synthesis of novel chalcones (E)-3-(4-chlorophenyl)-N-(4-(2,4-dioxo-dihydroquinazolin-3(4H)-yl)phenyl)acrylamide (2a,b) has been achieved by the condensation of isatoic anhydride, aromatic ketones with different aldehydes. These chalcones on cyclization with hydrazine hydrate, phenyl hydrazine in the presence of glacial acetic acid and guanidine hydrochloride in the presence of alkali to afford corresponding acetyl pyrazoline (3a,b) phenyl pyrazoline (4a,b) and amino pyrimidines (5a,b) respectively. All synthesised compounds were fully characterized by spectral studies and elemental analysis. Antibacterial activities of the final compounds have been Sent for bacterial growth..

Keyword :- Chalcones, pyrazoline, aminopyrimidine, antibacterial activ

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Abstract:This study involves synthesis and characterization of some biologically important metal complexes of Cu(II), Ni(II), and Co(II) with novel ligand derived from 1,2,3- triazole. The synthesized ligand and complexes were examined for antibacterial activity. The antimicrobial analysis was carried out using disc diffusion method. The effected zone values of the compounds against the growth of microorganisms are observed for ligand and metal complexes. The results indicate that the metal complexes are more active than parent ligand.

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Abstract: Schiff base ligand derived from salicylaldehyde and 2,4-dinitrophenylhydrazine were synthesized. Cu(II) and Zn(II) complexes (CuL2 and ZnL2) were synthesized. The compound were characterized on the basis of melting point/decomposition temperature, solubility, molar conductance, magnetic susceptibility infrared analysis and UV visible spectrophotometry. The complexes have been found to be 1:2 (Metal-Ligand) ratio. All the complexes have low molar conductance values, between (6.39-6.59) indicating non-electrolytic nature. The synthesized ligand and its metal (II) complexes were screened for antibacterial activity against five bacterial isolates (Escherichia coli, Proteus mirabilis, Klebsiella pneumoniae, Pseudomonas aureginosa and Staphylococcus aureus) and three fungal isolate (Fusarium solani, Aspergillus fumigate and Candida albicans) using well method. The results revealed that the complexes show more activity against the microorganisms compared to the Schiff base.

Keywords: Schiff bases, Metal complexes, 2,4-Dintrophenylhydrazine, Salicylaldehyde Microorganisms.

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Abstract:Present work deals with synthesizing novel chalcones using 4-aminoacetanilide with different types of benzaldehyde derivatives using Claisen-Schmidt condensation reaction. The synthesized chalcones were purified by recrystallization with ethanol. The characterization of the purified chalcones was made by IR, 1H NMR and 13C NMR data. The compounds were further subjected to antioxidant and antibacterial activities.

Key words: Chalcone, Claisen-Schmidt condensation, Antioxidant and Antibacterial activity.

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