Volume-11 ~ Issue-1 ~ January-2018

Abstract: In the present work the formation constant of ternary complexes [MAL], where M = Cu(II), A = 2,2'-Bipyridyl(2,2'-bipy) and L = Oxalic acid, Tyrosin, Ethylenediamine, Glycine,  - Alaline, Phenylalanine, Tryptophan have been determined and the values of ΔlogK have been calculated by using SCOG computer program. The analysis of the representative species distribution curves shows that in the pH range 1-3, metal ion Cu(II) is the major species. In the pH range 3-5, the species [MA] and [ML] is predominate. In the pH range 5-7, the species [MAL] exists. The value of logK of the complexes [Cu(2,2'-bipy)L] show more positive value when, L= tyr . This is due to the fact that the intramolecular interligand interaction involves in complex. The non-coordinated side group hydroxyphenyl ring.........

Keywords: Stability, Ternary Complex, 2,2'-Bipyridyl, SCOG etc.

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Abstract: Metals transition complexes, [M(Li)(H2O)2].(X)2.(H2O)n, (M= Mn, Ni, Cu or Zn; i=1 or 2; n=0, ½, 1 or 2) where L1 is the neutral tridentate Schiff base (E)-N1-(2-(phenyl(pyridin-2-yl)methyleneamino)ethyl)ethane-1,2-diamine and L2 is the neutral tetradentate Schiff base N-(phenyl(pyridine-2-ylmethylene)-2-(2-(2-(phenyl(pyridine-2-yl)methyleneamino)ethoxy)ethoxy)ethanamine both derived from benzoylpyridine. All these complexes were synthesized and characterized by physicochemical methods and spectroscopic studies. Both ligands are coordinated to the central atom as tetradentate through four nitrogen atoms. Each metal ion is also coordinated with two water molecules yielding octahedral complexes. The single crystal X-ray determination was also used to establish the structure of the complex (2) formulated as [Ni(L1)(H2O)2].(Cl)2. The asymmetric unit contains one molecule.........

Keywords: Schiff base, Complex, NMR, IR, Octahedral, Crystal structure..

[1]. A.R.J.Azar, S. Mohebbi, Novel magnetic nanomaterials: Synthesis, characterization and study of their catalytic application, Mater. Chem. Phys., 168, 2015, 85-94.
[2]. B. Shafaatian, S.S. Mousavi, S. Afshari, Synthesis, characterization, spectroscopic and theoretical studies of new zinc(II), copper(II) and nickel(II) complexes based on imine ligand containing 2-aminothiophenol moiety, J. Mol. Struct., 1123, 2016, 191-198.
[3]. A. Routaray, N. Nath, S. Mantri, T. Maharana, Synthesis and structural studies of copper(II) complex supported by –ONNO– tetradentate ligand: Efficient catalyst for the ring-opening polymerization of lactide, Chin. J. Catal., 36, 2015, 764-770.
[4]. A.R.J. Azar, S. Mohebbi, A novel magnetic hybrid nanomaterial as a highly efficient and selective catalyst for alcohol oxidation based on new Schiff base complexes of transition metal ions, J. Mol. Catal. A: Chem., 397, 2015, 158-165.
[5]. A. Messai, D. Bilge, M. Bilge, C. Parlak, New Cu(II) coordination polymer by chiral tridentate Schiff base ligand, J. Mol. Struct., 1137, 2017, 349-353...

Abstract: This work is aimed to compare the cytotoxic activity of Moringa oleifera and viscum cruciatum (Mistletoe) plants using brine shrimps utility technique. it also compares the anti-oxidative activity of the plants using DPPH radical scavenging assay. 100g of powdered samples were percolated with 96% ethanol. The extracts were macerated with petroleum ether, ethyl acetate and methanol respectively. The petroleum ether fraction of Viscum cruciatum and that of Moringa oleifera showed higher activity to brine shrimp lethality test wit LC50 values of 99.459 and145.684 respectively, while that of methanol fraction of Viscum cruciatum and that of Moringa oleifera showed fair activity to brine shrimp lethality test with LC50 values of 471.220 and 573.893. While, the methanol extract.........

Keywords: Anti-oxidative activities, Brine shrimp lethality Bioassay, Cytotoxic activity, DPPH, Moringa Oleifera, Mistletoe

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[4]. Talepo Po, Bassole IHM, Tamboura HN, Belemtougri R.G. Anti-spermatogenic activity of Moringa Oleifera, leaf steams aqueous extracts in male wistar rats. J. Pharmacol Toxicol. 6, 2011, 1-9
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Abstract: The aim of the current work is to screen in vitro inhibition of alpha-amylase enzyme activity in S1 ((E) – 2 – cyano – N'- (3-methyl-2,6-diphenylpiperdine-4-ylidene) acetohydrazide), S2 ((E) – 2-cyano-N'-(3-methyl-2,6, di-p-tolypiperidin – 4-ylidene) acetohydrazide) and S3 ((E) – 2-cyano-N'-(3-methyl-2,6, di-o-tolypiperidin – 4-ylidene) acetohydrazide). This in vitro study explores the antidiabetic properties of S1, S2 and S3 and it can be considered as a potential candidate for the management of type-II diabetes mellitus. The present findings exhibited a concentration dependent inhibition of α-amylase activity by S1, S2 and S3. The half inhibition concentration (IC50) of S1, S2, S3 and Acarbose tested against α-amylase were 1.240 0.648 0.2730.274mg/ml-1 respectively. The results of the study revealed that the antidiabetic activity of the S3 is much higher than that of S1 and S2 and near to the standard.

Keywords:Diabetes mellitus, S1, S2, S3, Acarbose, α-amylase

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Abstract: In the present investigation physico-chemical characteristics of river Ganga at Chandighat in Haridwar was studied during the period November 2008 to October 2009. Parameters studied were Temperature, pH, free CO2, D.O., B.O.D, T.D.S., Acidity, Alkalinity, Hardness, Calcium, Chlorides and Conductivity. Statistical analysis of the analytical data was computed in the table.

Keywords: Physicochemical parameter, River Ganga, Water quality

[1]. APHA-AWWA-WPCF 1998. Standard methods for examination of water and wastewater. 20th Eds. American Public Health Association; 1015, Fifteen street, New Washington. pp: 1-1134.
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Abstract: The radionuclide concentrations in fishes, water and sediments were analyzed using the (NaI) gamma-ray spectrophotometer and from the activity concentrations their radiological health hazard indices were mathematical computed and the physiochemical parameters of River Kaduna, Nigeria were also carried out. The result of the physiochemical parameters analysed in the river showed that BOD had mean value of 0.070mg/L ± 0.003, COD mean value was 3.84 ± 0.07mg/L, TSS obtained was 0.018 mg/L ± 0.023, Conductivity and TDS mean results were 0.380 ± 0.001 mS/cm and 0.18 ± 0.026 mg/L respectively while the pH and temperature were 6.70 ± 0.01 and 24.00 ± 0.040C respectively. The results of the samples analysed showed that the activity concentrations of 226Ra in fishes............

Keywords: Radionuclide, Hazard Indices, River Kaduna, Sediments, Gamma ray spectroscopy

[1]. Adamu R., Zakari Y. I., Ahmed A. Y., Abubakar. S. and Vatsa, A. M. Analysis of activity concentrations due to natural radionuclides in the fish of Kainji lake. Advances in Applied Science Research, 4(4):283-287 (2013)
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Abstract: The effect of difference in carbon number of the n-alkane precipitants on the precipitation of heavy organics from wellhead, separator and flowline crude oil samples was studied. N-pentane, n-hexane, n-heptane and their corresponding binary mixtures were used to precipitate the heavy organics from the crude oils using the simple or normal laboratory precipitation method. The result obtained showed that n-pentane precipitant yielded the highest precipitate at the three locations of the production system while n-heptane yielded the least precipitate (nC5> nC6 > nC7). Similarly, 1:1 nC5:nC6 binary mixtures recorded the highest precipitates while 1:1 nC6:nC7 recorded the least (1:1 nC5:nC6> 1:1 nC5:nC7> 1:1 nC6:nC7). The result is in agreement with previous reports that the lower carbon number n-alkane precipitants yield more precipitate than the higher carbon number. Crude oils from wellhead showed the highest precipitation tendency followed by those from Flowline and Separator.

Keywords: Asphaltenes, Binary mixtures, Crude oil, Heavy Organics, Hydrocarbon, Precipitation

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Abstract: In this study, Vanadium nanoparticles (VNps) were synthesized using Moringaoleifera leaf extract as both reducing and stabilizing agent using green method of synthesis and characterized using Ultraviolet (UV) spectrophotometer, pH, Conductivity, Fourier Transform Infrared (FT-IR) spectroscopy, Scanning Electron Microscopy (SEM). The Antimicrobial activity of the synthesized nanoparticle was tested against Bacteria and fungi. The determination of pH at different time interval shows a gradual decrease as a function of time and stabilizes from 14 – 24th hour this confirm the stability of the nanoparticles synthesized.The FTIR spectrum reveal the functional groups responsible for the reduction and synthesis of the nanoparticles, this is obvious from the two spectra of biomass and Vanadium that the flavones and phenolic led to the bio-reduction. The SEM Analysis reveals disperse particles that are..........

Keywords: Vanadium Nanoparticles, Moringaoleifera, antimicrobial activity, Nanoparticles

[1] C. V. Subba, K. Park, S. Mho, I. H. Yeo and S. M. Park, Simple preparation of V2O5. Nanostructures and their characterization. Bull. Korean Chem. Soc. 29(10), 2008, 2061-2064.
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Abstract: The use of the Fungus Penicillium species for the synthesis of silver nanoparticles was discussed in the present paper. The prepared nanoparticles were characterized by using UV-visible spectrophotometry, X-ray diffraction analysis, Transmission Electron Microscopy. The surface plasmon resonance peak observed at 413 nm in UV-visible spectra confirm the formation of silver nanoparticles. (TEM) images revealed that the particles were spherical with size in the range between 11 nm to 20 nm. Surface area electron diffraction pattern revealed the crystalline nature of silver nanoparticles with face centred cubic geometry. The synthesized silver nanoparticles were evaluated for the antimicrobial activity against Gram Positive bacteria S.aureus. and displayed the zone of inhibition 21mm in diameter.

Keywords: Biosynthesis, silver nanoparticles, UV-visible spectroscopy, XRD, TEM, antimicrobial activity

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Abstract: Guanidine and phosphonate derivatives of Benzothiazole, guanidinobenzothiazole, (GBT), guanidinophosphonatebenzothiazole, (GPBT)were synthesized alongwith their metal complexes, Fe(II), Co(II), Ni(II) Cu(II) and Zn(II). They werecharacterized by 1H NMR, 13C NMR, C.H.N analysis, percentage metal composition, FT-Infrared spectra analysis, UV–Visible electronic spectroscopy and magnetic susceptibility measurements. The results from the percentage composition of the metals in the complexes suggest that ratio of the metal to ligands is 1: 2 (M: L) where M = Fe(II), Co(II), Ni(II), Cu(II) and Zn(II). Thus, the prepared complexes have the general formulae [ML2]. Spectral analyses revealed that the nitrogen in the imidazolic, exocyclic and the terminal end of the ligands are the coordination sites.The electronic spectral data and the values of the magnetic moments suggest octahedral geometry for all the complexes except copper(II) complexes with a distorted octahedral geometry..

Keywords: Characterization, guanidine derivatives, metal complexes, synthesis

[1]. Bradley, L. N. and Larry E. O. (2006). Concise Synthesis of Guanidine-Containing Heterocycles Using the Biginelli Reaction.Journal of Organic Chemistry, 71, 7706–7714
[2]. Alan R. Katritzky*,± and Boris V. Rogovoy§ ( 2005 ). Recent developments in guanylatingagents ,Center for Heterocyclic Compounds,ARKIVOC. (iv), 49-87.
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[4]. Malek, T. M.;Sayyed, M. H.;Reza, H.; Nourallah, H.;Seyed, S. S. and Mohsen, R. (2011). An efficient and simple synthesis of α-amino phosphonates as drug like molecules catalyzed by silica supported per chloric acid (HClO4–SiO2). Arabian Journal of Chemistry. 4, 481–485.
[5]. Padmaja, M., Pragathi, J. and Kumari, C.G (2011). Synthesis, Spectral Characterization, Molecular Modeling and Biological Activity of First Row Transition Metal Complexes with Schiff Base Ligand Derived from Chromone-3-Carbaldehyde and o-Amino Benzoic Acid. Journal of Chemical and Pharmaceutical Research, 3, 602-613...

Abstract: Two derivatives of dithiocarbamate ligand (sodium phenyldithiocarbamate and sodium cyclohexyldithiocarbamate) were synthesized and infrared spectroscopy (IR) was used to confirm the functional groups associated with the ligands. The synthesized ligands ability to extract metal (Fe, Cu, Zn and Pb) ions from aqueous solutions was investigated. The analyses were carried out in five different pH to monitor its effect on heavy metal removal. Metal salts and synthesized ligands were dissolved in the same solvent (ethanol for Fe, Cu and Zn salts and dimethylsulfoxide for Pb salt) and a ligand-metal ratio of 2:1 used in the experiment. The ligands showed effective metal removal efficiency of up to 97.96%. It was observed that both ligands exhibited highest percentage metal removal efficiency at the same pH value (11.0) for all the metals used with the exception of copper (pH 8.5). Though both ligands were effective in metal removal, the aromatic derivative of the ligand showed better percentage removal efficiencies (71.20% - 97.96%). Statistical analysis carried out on the data generated showed significant difference in the metal removal for both ligand particularly in respect of copper and iron.

Keywords: Dithiocarbamate, Ligands, Metal removal, water pollution, Heavy metal.

[1]. R. Abu-El-Halawa, and S. A. Zabinb, Removal efficiency of Pb, Cd, Cu and Zn from polluted water using dithiocarbamate ligands Journal of Taibah University for Science 11, (2015) 57–65
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Abstract: Poly (N-Imidazolylmaleamic acid) PIM was synthesized from monomer (N-Imidazolylmaleamic acid) NIMin aqueous solution using electrochemical oxidation procedures. The polymer film was formed on Stainless steel electrodes (working electrode). Its structure has been examined by infrared, FTIR, scanning electron microscopy SEM and atomic force microscopy AFM studies indicate that the polymer was formed. Also, study the anticorrosion action of polymer film on stainless steel by electrochemical polarization method.Furthermore, enhanced the anticorrosion of polymerby nanomaterial such as (TiO2 and ZnO (bulk-nano)) by adding to monomer solution. The results obtained showed that the corrosion rate of S-steel increased with temperature increase from 293K to 323K and the values of inhibition efficiency by coating polymer increase with nanomaterial addition. Kinetic and..........

Keywords: electro polymerization, N-Imidazolylmaleamic acid, anti-corrosion, nanomaterial.

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Abstract: Street dusts were collected from twenty two road side locations in Dhaka City, Bangladesh. Dusts samples were sieved below 90 μm and analyzed by Energy Dispersive X-ray Fluorescence (EDXRF) for eight toxic heavy metals (Pb, Cr, Cu, Cd, Ni, As, Zn and Mn). This study revealed that the concentrations of these metals were higher than that of the background value of the respective metals in soil. For the assessment of pollution level in the street dusts in Dhaka City, several important indices: enrichment factor (EF), pollution index (PI), pollution load index (PLI), and geo-accumulation index (Igeo) were followed in this study. ArcGIS software is used to generate the spatial distribution map for the heavy metals, which specifies high and low concentrated zone of toxic heavy metals in the study area. Enrichment factors analysis indicated the anthropogenic and natural sources of metal contamination. Pearson's correlation coefficients analysis show that Cu, Pb, Cd, Ni, Zn, As and Mn which are significantly positively correlated, likely originate from common anthropogenic sources. Chromium was found at high concentrations in all the samples that seems also to have anthropogenic sources, but not the same ones as for the other contaminants. All the models agreed that contamination levels is in increasing order of Mn>Zn >Cr>Cu>Ni>Pb>Cd>As..

Keywords: --Street dusts; Enrichment factor; Heavy metals; Chromium, Contamination factor; Dhaka city.

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